WO2018100143A1 - Facteur de croissance placentaire pour le traitement des troubles causes par l'alcoolisation foetale (tcaf) - Google Patents
Facteur de croissance placentaire pour le traitement des troubles causes par l'alcoolisation foetale (tcaf) Download PDFInfo
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- WO2018100143A1 WO2018100143A1 PCT/EP2017/081159 EP2017081159W WO2018100143A1 WO 2018100143 A1 WO2018100143 A1 WO 2018100143A1 EP 2017081159 W EP2017081159 W EP 2017081159W WO 2018100143 A1 WO2018100143 A1 WO 2018100143A1
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/18—Growth factors; Growth regulators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/18—Growth factors; Growth regulators
- A61K38/1858—Platelet-derived growth factor [PDGF]
- A61K38/1866—Vascular endothelial growth factor [VEGF]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/30—Drugs for disorders of the nervous system for treating abuse or dependence
- A61P25/32—Alcohol-abuse
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6883—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6872—Intracellular protein regulatory factors and their receptors, e.g. including ion channels
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/112—Disease subtyping, staging or classification
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/118—Prognosis of disease development
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/158—Expression markers
Definitions
- Alcohol is a teratogen responsible for physical and behavioral damage. In humans, prenatal exposure to alcohol can lead to alterations in brain development. Thus, alcohol consumption during pregnancy (fetal alcoholization) is the leading cause of disability and in particular mental retardation of non-genetic origin in the world and also in France.
- the damage varies according to the period in which the fetus was exposed, blood alcohol levels, genetic and environmental factors, and the mode of consumption (chronic, binge drinking).
- Fetal Alcohol Syndrome is the most extreme and disabling manifestation of fetal alcohol spectrum disorder (FASD). Its incidence is estimated in France at 1, 5% of births. FAS associates physical abnormalities such as hypotrophy (growth retardation), craniofacial dysmorphism and neurobehavioral abnormalities resulting in cognitive function disorders (attention deficit, motor skills, learning disorders, memorization). Neurological sequelae are also present in FASD children whose incidence is estimated in France at nearly 1% of births.
- Cerebral angiogenesis is concomitant with the process of neurogenesis and contributes to good brain development by providing nerve cells with nutrients, oxygen and trophic factors.
- cerebral angiogenesis is a prerequisite for the proper development of the neural network.
- a direct impact of cerebral vessels on the migration process of neuronal populations and oligodendrocytes has recently been demonstrated. It has also been established previously by the inventors that alcohol in utero interferes with cerebral angiogenesis and that this effect contributes to brain abnormalities of alcoholization.
- Targeting vascular abnormalities of in utero exposure to alcohol therefore appears as a therapeutic strategy to reduce the neurodevelopmental effects of alcohol and to correct impaired brain functions.
- the current management of FASD children aims, by stimulating motor and cognitive functions, to reduce language, learning and attention disorders that are diagnosed late, often between 4 and 5 years of age. The scholarship. The results obtained by such monitoring are limited and the disorders
- placental determination of placental growth factor makes it possible to identify, among children exposed in utero to alcohol, those who have suffered brain damage. In particular, these children show a decrease in placental PIGF levels which corresponds to impaired cerebral angiogenesis.
- placental PIGF supplementation corrects the action of alcohol on morphometric and anatomical indicators indicative of fetal growth such as the size body and head at birth.
- the inventors have demonstrated that increasing the amount of PIGF can greatly reduce the deleterious effect of alcohol on the cerebral vasculature of the fetus. In particular, it makes it possible to improve cerebral angiogenesis and to correct the disorganization of microvessels induced by alcohol.
- PIGF Fetal Growth Factor
- the present invention thus opens a new way in the prevention and / or treatment of FASD and in particular, in the prevention and / or treatment of neurological disorders (such as hyperactivity, loss of attention, depression, anxiety, emotional disturbances, excessive irritability, behavioral problems, etc.) due to abnormal neuronal and oligodendrocytic migraine-mediated migrations or growth disorders (hypotrophy) following alcohol consumption during the pregnancy.
- the present invention thus relates to a placental growth factor (PIGF) for its use in the prevention and / or treatment of fetal alcohol spectrum disorder (FASD) in a subject having been exposed to alcohol. in utero.
- PIGF placental growth factor
- PIGF vascular endothelial growth factors
- VEGF vascular endothelial growth factors
- PIGF within the meaning of the invention is a 149 amino acid protein highly similar to VEGF-A which is recognized by the same receptor as the latter, VEGF-R1, but which is not recognized by the VEGF receptor. -R2.
- PIGF is strongly expressed by the placenta, but not by the fetus and in particular by the fetal brain. N-terminal glycosylated PIGF is secreted and functions as a dimer to control angiogenesis.
- PIGF refers in particular to all 4 isoforms PIGF1-4: PlGF-1 and PlGF-3 are isoforms that do not bind heparin while PlGF-2 and PlGF-4 contain additional domains that allow to fix heparin. Even more preferentially, PIGF is understood to mean a human protein whose sequence is chosen from any of the isoforms identified by Uniprot accession numbers P49763-2 (PlGF-1, the amino acid sequence of which corresponds to SEQ ID No.
- recombinant PIGF or protein analogs of human PIGF can also be used in the prevention and / or treatment of FASD.
- the PIGF of the present invention is obtained by using a prokaryotic or eukaryotic recombinant protein production system, in particular by i) culturing a microorganism or transformed eukaryotic cells using a nucleotide sequence coding for the Human PIGF (accession number NCBI of gene 5228, accession number of transcripts NM_002632.5 (SEQ ID NO: 5), NM001207012.1 (SEQ ID NO: 6), NM_001293643.1 (SEQ ID NO: 5) ID NO: 7)) and ii) isolating the protein produced by said microorganism or said eukaryotic cells.
- This technique is well known to those skilled in the art.
- the PIGF protein is preferably purified / isolated from cell lysates and / or cell supernatants by which it is expressed and / or secreted. This purification can be done by any means known to those skilled in the art. Many purification techniques are described in Voet D and Voet JG, Protein and Nucleic Acid Purification Techniques.
- the recombinant protein production systems use nucleic acid vectors comprising nucleic acids encoding the polypeptides to be synthesized, which are introduced into host cells that produce said polypeptides (for more details, refer to "Recombinant DNA Technology I", Editors Aies Prokop, Raskesh K Bajpai, Annals of the New York Academy of Sciences, Volume 646, 1991).
- nucleic acid molecule of interest in which a nucleic acid molecule of interest can be inserted in order to introduce and maintain it in a eukaryotic or prokaryotic host cell are known; the choice of an appropriate vector depends on the use envisaged for this vector (for example replication of the sequence of interest, expression of this sequence, maintenance of this sequence in extrachromosomal form or integration into the chromosomal material of the host ), as well as the nature of the host cell (for example, plasmids are preferably introduced into bacterial cells, while YACs are preferably used in yeasts).
- These expression vectors may be plasmids, YACs, cosmids, retroviruses, episomes derived from EBV, and all the vectors that the person skilled in the art may judge appropriate for the expression of said chains.
- the vectors according to the invention comprise the nucleic acid encoding PIGF, or a similar sequence, as well as the means necessary for its expression.
- the term "means necessary for the expression of a peptide” means the term peptide being used for any peptide molecule, such as protein, polyprotein, polypeptide, etc. any means which makes it possible to obtain the peptide, such as in particular a promoter, a transcription terminator, an origin of replication and preferably a selection marker.
- the means necessary for the expression of a peptide are operably linked to the nucleic acid sequence encoding the polypeptide fragment of the invention.
- operably related is meant a juxtaposition said elements necessary for the expression of the gene encoding the polypeptide fragment of the invention, which are in a relationship such that it allows them to function in an expected manner. For example, there may be additional bases between the promoter and the gene encoding the polypeptide fragment of the invention as long as their functional relationship is preserved.
- the means necessary for the expression of a peptide can be homologous means, that is to say naturally understood in the genome of the vector used, or else be heterologous, that is to say artificially added to from another vector and / or organism.
- heterologous promoters include viral promoters such as SV40 promoter (Simian Virus 40), Herpes simplex virus thymidine kinase gene promoter (TK-HSV-1), sarcoma virus LTR of Rous (RSV), the immediate first promoter of cytomegalovirus (CMV) and the major adenoviral major promoter (MLP), as well as any cellular promoter that controls the transcription of genes encoding peptides in higher eukaryotes, such as the promoter of constitutive phosphoglycerate kinase (PGK) gene (Adra et al., Gene Volume 60, Issue 1, 1987, Pages 65-74), the liver specific gene promoter alphal-antitrypsin and FIX, and the SM22 specific promoter smooth muscle (Moessler et al., Development 1996 Aug; 122 (8): 2415-25).
- viral promoters such as SV40 promoter (Simian Virus 40), Herpes simple
- the vectors of the invention may also include sequences necessary for targeting the peptides to particular cell compartments.
- An example of targeting may be targeting to the endoplasmic reticulum obtained using adenovirus E3 leader-type targeting sequences (Ciernik IF, et al., The Journal of Immunology, vol. 162, 1999, pages 3915 -3925).
- the term "transcription terminator” here designates a sequence of the genome that marks the end of the transcription of a gene or operon, into messenger RNA. The mechanism of transcription termination is different in prokaryotes and eukaryotes.
- Rho-independent terminator inverted repeat sequence followed by a series of T (uracils on transcribed RNA) or a Rho-dependent terminator ( consisting of a consensus sequence recognized by the Rho protein).
- Rho-independent terminator inverted repeat sequence followed by a series of T (uracils on transcribed RNA) or a Rho-dependent terminator ( consisting of a consensus sequence recognized by the Rho protein).
- the term "origin of replication” also called ori
- ori is a unique DNA sequence for the initiation of replication. It is from this sequence that unidirectional or bidirectional replication begins.
- the skilled person knows that the structure of the replication origin varies from one species to another; it is species specific well that it has some common features between species. A protein complex is formed in this sequence and allows the opening of the DNA and the start of the replication.
- the vectors comprising the genetic sequence encoding PIGF are prepared by methods commonly used by those skilled in the art.
- the resulting clones can be introduced into an appropriate host by standard methods known to those skilled in the art to introduce polynucleotides into a host cell.
- Such methods may be processing using dextran, precipitation by calcium phosphate, transfection using polybrene, protoplast fusion, electroporation, encapsulation of the polynucleotide into liposomes, the 'biolistic injection and direct microinjection of DNA into the nucleus.
- Said sequence (isolated or inserted in a plasmid vector) can also be combined with a substance which allows it to cross the host cell membrane, such that a carrier as a nanotransporter or a liposome preparation, or cationic polymers.
- a carrier as a nanotransporter or a liposome preparation, or cationic polymers.
- these methods can advantageously be combined, for example by using electroporation associated with liposomes.
- microorganisms suitable for the purposes of the invention include yeast (Buckholz RG, Current Opinion in Biotechnology vol 4, No. 5, 1993, pages 538 -.. 42) and bacteria (Olins and Lee, Current Opinion in Biotechnology, Vol 4, No. 5, 1993, pp. 520-5).
- eukaryotic cells include cells from animals such as mammals (Edwards CP and Aruffo A, Current Opinion in Biotechnology vol 4, No. 5, 1993, pages 558 -.. 63), the reptiles, and the like.
- the plant cells can also be used.
- the host cell used to produce the fragment of the invention is a bacterium, preferably the bacterium E. coli.
- the person skilled in the art knows the conditions under which these cells should be cultivated, as well as the experimental conditions necessary for the expression of the polypeptide fragments by these cells.
- the method for producing recombinant PIGF may comprise the following steps: a) culturing in a suitable culture medium and conditions a host cell comprising the PIGF coding vector; and b) isolating the PIGF produced in step a).
- PIGF can be isolated (purified) from the expressing cell. In this case, a preliminary step of lysis of said cells may be necessary.
- the media and culture conditions associated with each cell type used for the production of recombinant proteins are well known to those skilled in the art.
- Isolation (or purification) of IGFP can be done by any means known to those skilled in the art. For example, differential precipitation or ultracentrifugation. It may also be advantageous to purify the PIGF by ion exchange chromatography, affinity chromatography, molecular sieving, or isofocalization. All of these techniques are described in Voet D and Voet JG, Protein and Nucleic Acid Purification Techniques, Chapter 6, Biochemistry, 2nd Edition.
- the material from which the protein is to be extracted (animal or plant tissue, bacteria, etc.) is generally ground.
- Various devices “ Waring Blender” , Potter-Eveljhem apparatus, “ Polytron “ , etc.) may be used for this purpose.
- This homogenization is done in a buffer of appropriate composition, well known to those skilled in the art.
- the homogenate thus obtained is then clarified, usually by centrifugation, to remove large particles poorly ground or to obtain the cellular fraction containing the desired protein.
- a mild detergent Triton X-100, Tween 20, sodium deoxycholate, etc.
- the detergent use must often be done in a controlled manner because they can break lysosomes, releasing hydrolytic enzymes (proteases, nucleases, etc.) that can attack and destroy the proteins or other molecules that we want to isolate. Special precautions should be taken when working with degradation-sensitive or few proteins.
- a Frequent solution to this problem is the inclusion in solutions of protease inhibitors that are physiological (trypsin inhibitors, antipain, leupeptin, etc.) or artificial (E64, PMSF, etc.). Then various techniques exist to isolate the desired protein.
- a vector bearing a sequence making it possible to identify the PIGF of the invention.
- PIGF can be produced at levels of at least 1 mg per liter, preferably 2 mg per liter, even more preferably 5 mg per liter of cell culture.
- the PIGF by chemical synthesis.
- chemical synthesis processes for example techniques employing solid phases or using partial solid phases, by condensation of the protein or by synthesis in conventional solution.
- the fragments of the invention may for example be synthesized by synthetic chemistry techniques, such as Merrifield synthesis which is advantageous for reasons of purity, antigenic specificity, absence of undesired side products and for its ease of production.
- This chemical synthesis can be coupled to a genetic engineering or genetic engineering approach alone using techniques well known to those skilled in the art and described for example in Sambrook J. et al., Molecular Cloning: A Laboratory Manual, 1989.
- PIGF Factorous Alcohol Spectrum Disorder
- Reagents and starting materials are commercially available, or can be synthesized by well-known conventional techniques (see for example, WO 00/12508, WO 2005/085260).
- PIGF analogs can be synthesized using the technique described by Zheng et al. (Acta Ophthalmologica 2012 90 (7): e512 - e523).
- the present invention relates to a PIGF for its use in the prevention and treatment of FASD.
- Fetal Alcohol Spectrum Disorder (FASD) refers to all disorders in children resulting from exposure to alcohol during pregnancy. This term includes, among other things, all the behavioral disorders that will gradually become apparent with age. Children with these disorders are called "FASD children.
- FASD fetal alcohol syndrome
- craniofacial dysmorphia including shortened palpebral fissures, a smooth, elongated, erased nasolabial fold, and a thin upper lip
- nonspecific growth retardation prenatal or postnatal height or weight or head circumference
- miscellaneous malformations cardiacopathies, urogenital malformations, digestive malformations or cerebral architectural disorders
- neurodevelopmental disorders sometimes expressed by mental retardation and more often by learning difficulties.
- cerebrovascular disease is meant here any alteration of the cerebrovascular system, including an alteration resulting in impaired or even defective operation of the system.
- a cerebrovascular disease in the context of the invention may in particular be a disorganization of the cerebrovascular system. More particularly, fetal alcoholization induces a random orientation of the cerebral vessels.
- the fetal alcohol disorder is linked to cerebrovascular disease. Even more particularly, said fetal alcohol disorder is related to disorganization of the cerebrovascular system.
- Cerebral angiogenesis is the process of forming blood vessels in the brain.
- PIGF is used to stimulate cerebral angiogenesis and thus improve brain function.
- the PIGF can be used to prevent and / or treat at least one FASD selected from any of the above-mentioned maladjustment and behavior disorders.
- PIGF can also be used to prevent and / or treat fetal alcohol syndrome (FAS), especially when FAS is manifested as hypotrophy.
- FAS fetal alcohol syndrome
- FES Fetal Alcohol Syndrome
- FASD fetal alcohol spectrum disorder
- Partial FAS is when the child has only a part of the FAS symptoms. Partial SAF children, however, always have one or more neurobehavioral abnormalities.
- hypotrophic if its weight and height are below the 10th percentile of the reference curves. This is often the case for premature newborns and newborns exposed in utero to alcohol.
- the hypotrophy can also be diagnosed before term, by ultrasound: one speaks about fetal hypotrophy or intrauterine growth retardation.
- the present invention thus relates to a PIGF for its use in the prevention and / or treatment of FAS, especially when FAS is manifested in the form of hypotrophy due to intrauterine exposure to FAS. 'alcohol.
- the subject is a hypotrophy of the whole body of a subject or one or more of its parts selected from the torso (or called the body), the abdomen and the skull.
- the subject is a fetus or a child, particularly a premature baby.
- the subject having been exposed in utero to the alcohol is selected from an embryo, a fetus or a child, preferably a fetus or a child, in particular, a premature child.
- the period between the 30th gestational week and the term of pregnancy is the period during which brain angiogenesis is the most important. It is thus particularly preferred to administer the PIGF to a fetus exposed in utero to alcohol at precisely this time.
- the treatment when the subject TCAF is a premature child, the treatment will consist in supplementing in PIGF this subject on the exerter period corresponding to the lost weeks of intra-uterine life.
- the treatment window can extend from the 30th gestational week to the theoretical term (40 gestational weeks), during which time cerebral angiogenesis in humans is particularly intense.
- subject means a human, and preferably an embryo, a fetus or a child.
- An "embryo” as it is understood here corresponds to a fertilized oocyte less than three months old.
- fetus is meant an individual taken before birth and whose gestational age is between 3 and 9 months. After childbirth, the subject becomes a child.
- child is meant according to the invention an individual whose age is less than 3 years.
- newborns whose age is between 0 and 1 month
- infants who are between 1 month and 2 years
- the children themselves who are at least 2 years old.
- premature children may as well be born at term as it is premature.
- premature refers to a child born alive before 37 weeks of amenorrhea. This term covers three sub-categories: extreme prematurity ( ⁇ 28 weeks); extreme prematurity (between the 28th and 32nd week); average prematurity or late (between the 32nd and 37th week).
- premature children treated with PIGF are preferably in the category of medium or even late prematurity.
- a subject with Fetal Alcohol Spectrum Disorder refers to an embryo, fetus or subject, particularly human, who is exposed to or likely to be exposed to In utero alcohol with fetal alcohol impairment or who is at risk of developing maternal alcohol consumption as a condition related to fetal alcohol spectrum disorder, including the effects described above.
- a TCAF subject may have a whole body size or its parts below normal and a disorganized cerebral vascular network, said disorganization being notably related to a random orientation of the cerebral vessels.
- treatment is meant any action to reduce or eradicate the symptoms or causes of FASD.
- a treatment within the meaning of the invention may comprise the administration of PIGF, a pharmaceutical composition or a product comprising it with or without a psychotherapeutic follow-up.
- prevention is meant any action that completely or partially prevents the risk of symptoms or the causes of FASD.
- Prevention within the meaning of the present invention comprises the administration of PGIG, of a pharmaceutical composition, to a subject exposed in utero to alcohol or to a subject having been exposed in utero to alcohol but for which the symptoms of TCAF have not yet appeared and cerebral angiogenesis still in progress.
- the inventors take advantage of the fact that PIGF is an angiogenic factor naturally present at these stages of fetal development in a healthy subject, which has the advantage of easy use of IFIG by compensation in the prevention of FASD.
- the placental growth factor is administered in a therapeutically effective amount to a subject having been exposed to the alcohol in utero.
- a therapeutically effective amount means an amount sufficient to influence the therapeutic course of a particular disease state.
- a therapeutically effective amount is also that to which all the toxic effects or side effects of the agent are compensated by the therapeutically beneficial effects of the active ingredient used.
- the placental growth factor is administered in utero and / or ex utero. It is thus conceivable to start a treatment (or prevention) by the administration of IGFI during the intrauterine period and to continue it after delivery especially when the child is born prematurely and therefore loses the physiological contribution of placental PIGF.
- the PIGF will be administered alone or in a pharmaceutical composition systemically, particularly intravenously, intramuscularly, intradermally, intraperitoneally, subcutaneously, or orally. More preferably, the PIGF will be administered several times, spread over time.
- IGF insulin growth factor
- IFIG intravenously
- Optimal modes of administration, dosages and dosage forms may be determined according to the criteria generally considered in establishing a patient-specific treatment such as, for example, the age or body weight of the patient, the severity of his or her general condition, tolerance to treatment and side effects noted.
- PIGF When PIGF is administered as pharmaceutical compositions, for subcutaneous, intramuscular, intravenous, transdermal local administration, PIGF can be administered in unit dosage forms, in admixture with conventional pharmaceutical carriers to the subject in need thereof. . Suitable unit dosage forms include intramuscular, intravenous forms.
- the choice of the most appropriate administrative voice will depend on when this administration is performed.
- this will be done intermuscularly or intravenously, preferably at the placental level.
- administration of the pharmaceutical composition comprising PIGF to a newborn child or a premature child is preferably made intravenously.
- aqueous suspensions for parenteral, intranasal or intraocular administration, aqueous suspensions, isotonic saline solutions or sterile and injectable solutions containing dispersing agents and / or pharmacologically compatible wetting agents are used.
- Forms for parenteral administration are conventionally obtained by mixing PIGF with buffers, stabilizing agents, preservatives, solubilizing agents, isotonic agents and suspending agents. In accordance with known techniques, these mixtures are then sterilized and then packaged in the form of intravenous injections.
- buffers based on organic phosphate salts.
- suspending agents include methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, acacia and sodium carboxymethylcellulose.
- useful stabilizers according to the invention are sodium sulfite and sodium metasulfite, while sodium p-hydroxybenzoate, sorbic acid, cresol and chlorocresol can be mentioned as preservatives.
- compositions of the invention may be formulated to be administered to the patient by a single route or by different routes.
- the dosage depends of course on the form in which the PIGF will be administered, the mode of administration, the therapeutic indication, the age of the patient and his condition.
- the dose to be administered is preferably from 0.001 to 250 mg / kg of PIGF per day, preferably from 0.01 to 100 mg / kg of PIGF per day, more preferably from 0.1 to 50 mg / kg of PIGF per day. day and even more preferably from 1 to 25 mg / kg of PIGF per day.
- the unit dose of PIGF preferably comprises from 0.1 to 50 mg / kg of this compound.
- the initially administered dose of PIGF may be adjusted if necessary during treatment depending on the response to this treatment of the subject being treated.
- the skilled person based on this general knowledge and on the present description will adjust the dose of PIGF so as to optimize its therapeutic effect.
- the placental growth factor can also be used in the form of active ingredient in a pharmaceutical composition.
- the present invention thus relates to a pharmaceutical composition
- a pharmaceutical composition comprising a placental growth factor (PIGF) as defined above and a pharmaceutically acceptable vehicle for its use in the prevention and / or treatment of disorders caused by the fetal alcoholization (FASD).
- the pharmaceutical composition according to the present invention can be used in the prevention and / or treatment of different types of FASD as described for the PIGF below.
- these FASD are selected from the group consisting of disorders of maladjustment and behavior or fetal alcohol syndrome (FAS), especially when manifested as hypotrophy and cerebrovascular disease due to exposure to alcohol in utero.
- composition of the present invention can also be used to enhance cerebral angiogenesis in a subject having been exposed to alcohol in utero.
- the term "pharmaceutically acceptable carrier” means any material which is suitable for use in a pharmaceutical product.
- a pharmaceutically acceptable vehicle mention may be made of lactose, optionally modified starch, cellulose, hydroxypropylmethylcellulose, mannitol, sorbitol, xylitol, dextrose, calcium sulphate, sodium phosphate and the like.
- composition according to the invention can be in various forms and be administered in different ways as indicated above in detail.
- the pharmaceutical composition of the present invention comprises a PIGF as an active ingredient in a concentration of between 0.001 mg / kg and 250 mg / kg by weight relative to the total weight of the subject to whom the pharmaceutical composition will be administered.
- the concentration of PIGF is between 0.01 mg / kg and 100 mg / kg by weight relative to the weight of the subject to which the pharmaceutical composition will be administered and even more particularly, between 0.15 mg / kg and 50 mg / kg. kg by weight relative to the weight of the subject to which the pharmaceutical composition will be administered or between 1 mg / kg and 25 mg / kg by weight relative to the total weight of the subject to which the composition will be administered.
- the inventors have demonstrated that the increase in the amount of PIGF is particularly effective in restoring the attainment of cerebral vasculature thus making it possible to reduce the neuronal function to a normal state.
- the PIGF or the pharmaceutical composition comprising it is therefore used for the treatment and / or prevention of cerebral vasculature damage due to exposure to alcohol in utero.
- PIGF insulin growth factor
- the inventors have also demonstrated that increasing the amount of PIGF makes it possible to increase the size of the entire body of a fetus or one or more of its parts, in particular the size of the skull, the size of the body, abdomen size and depth after exposure to alcohol during the intrauterine period. This allows partial or complete recovery of the normal morphometric appearance.
- the present invention thus relates to a PIGF or a pharmaceutical composition comprising it for its use in the prevention and / or treatment of hypotrophy due to intrauterine exposure to alcohol, especially when this hypertrophy is a manifestation of FAS.
- it is a hypotrophy of the whole body of a subject or one or more of its parts selected from the torso (or called the body), the abdomen and the skull.
- the subject is a SAF subject who is a fetus or newborn, particularly a premature baby.
- a fourth aspect of the invention relates to a method of treating fetal alcohol disorder in a subject.
- the method comprises a step of administering or overexpressing PIGF or administering a pharmaceutical composition comprising same to a subject having FASD including in particular fetal alcohol syndrome (FAS), particularly when manifested in the form of FASD. hypotrophy and / or cerebrovascular disease of a subject who has been exposed to alcohol in utero.
- FAS fetal alcohol syndrome
- This method of treatment may comprise a prior stage of diagnosis of FASD.
- the present invention relates to the placental growth factor (PIGF), a pharmaceutical composition or a product comprising it according to the invention for use in the treatment of FASD, said use comprising a step prior to identification of the subject, said identification comprising the steps of: a) measuring the amount of PIGF in a biological sample of said subject, preferably from the placenta or cord blood; b) comparing the amount of PIGF of step a) with a reference that is a measure of the amount of PIGF in a healthy individual, and c) determining a FASD or risk of developing FASD in said subject.
- biological sample according to the invention any sample that can be taken from a subject.
- the biological sample is a sample from the placenta, including the umbilical cord.
- PIGF is expressed by placental cells throughout pregnancy. This makes it possible to assay the PIGF without compromising the integrity of the subject, in particular when the subject is an embryo or a fetus.
- the biological sample must allow the determination of the level of expression of PIGF.
- the test sample may be used as obtained directly from the biological source or as a result of pretreatment to change the character of the sample.
- pretreatment may include plasma preparation from blood, dilution of viscous fluids, and so on.
- Pre-treatment methods may also involve filtration, precipitation, dilution, distillation, mixing, concentration, inactivation of disrupting components, addition of reagents, lysis, etc.
- it may be beneficial to modify a solid test sample to form a liquid medium or to release the analyte.
- PIGF protein is a secreted protein (DeFalco, Exp Mol Med 44 (1): 1-9, 2012).
- Preferred biological samples for determining the level of expression of said protein include in particular blood, plasma, or lymph samples.
- the biological sample is a blood sample.
- the biological sample is a sample of placental blood or cord blood. This is usually collected during childbirth. Blood from placental vessels can then be obtained to measure the rate of PIGF.
- the subject when the amount of PIGF measured in step a) is less than the reference, the subject is determined to be suffering from or having a risk of developing a FASD and in particular an impairment of cerebral vasculature or FAS. , especially hypotrophy.
- the amount of PIGF is measured when a subject has at least one disorder that may be related to intrauterine alcohol exposure.
- the amount of PIGF will also be measured when a subject does not present one or more particular disorders related to intrauterine alcohol exposure but for whom exposure to alcohol during that period has been proven or suspected.
- measuring the amount of PIGF as described above will make it possible to confirm or refute a FASD or the risk of developing one prior to the therapeutic management.
- the amount of PIGF is determined by measuring the amount of transcripts encoding the PIGF or the amount of the polypeptide.
- the level of gene expression or protein can be measured by many methods that are available to those skilled in the art. There may be several intermediate steps between taking the biological sample and measuring the PIGF expression, said steps corresponding to extracting from said sample an mRNA sample (or corresponding cDNA) ) or a protein sample. This can then be directly used to measure the expression of PIGF. Preparation or extraction of mRNA (as well as retrotranscription thereof into cDNA) or proteins from a cell sample are only routine procedures well known to those skilled in the art.
- mRNA level i.e., all mRNAs or cDNAs
- proteins i.e., all the proteins present in the sample
- PIGF When the expression of PIGF is measured at the level of the mRNA (or corresponding cDNA), any technology usually used by those skilled in the art can be implemented. These technologies for analyzing the level of gene expression, such as, for example, transcriptome analysis, include well-known methods such as PCR (Polymerase Chain Reaction, based on DNA) and RT-PCR (reverse transcription). PCR transcription, if you start from RNA) or quantitative RT-PCR or nucleic acid chips (including DNA chips and oligonucleotide chips) for higher throughput.
- PCR Polymerase Chain Reaction, based on DNA
- RT-PCR reverse transcription
- nucleic acid chips is meant herein several different nucleic acid probes that are attached to a substrate, which may be a microchip, a glass slide, or a microsphere-sized bead.
- the microchip may consist of polymers, plastics, resins, polysaccharides, silica or a material based on silica, carbon, metals, inorganic glass, or nitrocellulose.
- the probes can be nucleic acids such as cDNAs ("cDNA chips”), mRNAs (“mRNA chips”) or oligonucleotides (“oligonucleotide chips”), said oligonucleotides typically having a length of between about 25 and 60 nucleotides.
- cDNA chips cDNA chips
- mRNA chips mRNAs
- oligonucleotide chips oligonucleotides
- nucleic acid corresponding to all or part of said gene is labeled and then brought into contact with the chip under hybridization conditions, leading to the formation of complexes between said nucleic acid.
- tissue chips also known as TMAs: "tissue microarrays”
- the tests usually used with tissue chips include immunohistochemistry and fluorescent in situ hybridization. For mRNA analysis, the tissue chips can be coupled with fluorescent in situ hybridization.
- RNA-Seq or "Whole Transcriptome Shotgun Sequencing”
- mass sequencing in parallel several methods of mass sequencing in parallel are available. Such methods are described in, for example, US 4,882,127, US 4,849,077; US 7,556,922; US 6,723,513; WO 03/066896; WO 2007/11 1924; US 2008/0020392; WO 2006/084132; US 2009/0186349; US 2009/0181860; US 2009/0181385; US 2006/0275782; EP-B1-1141399; Shendure to Ji, Nat Biotechnol., 26 (10): 1135-45.
- the expression of the PIGF is measured at the protein level by a method selected from immunohistology, immunoprecipitation, western blot, dot blot, ELISA or ELISPOT, protein chips, microarray chips.
- the amount of PIGF is determined by a method chosen from immunoprecipitation, immunohistology, western blot, dot blot, ELISA or ELISPOT, protein chips, antibody chips, or tissue chips coupled with immunohistochemistry.
- Antibodies directed against PIGF are commercially available (see, for example, RaD Systems, Santa Cruz, Abcam, etc.) and may be used in the methods of the invention. Even more preferably, the expression of PIGF is measured by Western Blot or ELISA.
- the amount of PIGF is normalized with respect to a control marker which may be a gene selected from B2M, TFRC, YWHAZ, RPLO, 18S, GUSB, UBC, TBP, GAPDH, PPIA, POLR2A, ACTB, PGK1, HPRT1, IP08 and HMBS, or a polypeptide selected from the product of said genes.
- a control marker which may be a gene selected from B2M, TFRC, YWHAZ, RPLO, 18S, GUSB, UBC, TBP, GAPDH, PPIA, POLR2A, ACTB, PGK1, HPRT1, IP08 and HMBS, or a polypeptide selected from the product of said genes.
- the rate of PIGF thus measured is then compared to an expression level of reference PIGF to determine whether it is a FASD subject.
- a level of expression of reference PIGF is meant within the meaning of the present application any rate of expression of said factor used for reference.
- a reference expression level can be obtained by measuring the level of expression of PIGF in a biological sample, for example a placenta or umbilical blood, of a healthy subject, i.e. a subject who has not been exposed to alcohol in utero.
- FIG. 1 Effects of in utero alcohol exposure on cortical angiogenesis in mouse E20 embryos.
- A, B Effects of Fetal Alcohol Exposure from GD15 to GD20 on the Organization of Cortical Microvessels in Control (A) Animals and Exposed to Alcohol (B). Microvessels of the brain were visualized by immunohistochemistry against CD31. The arrows indicate the microvessels of the brain with a radial orientation in the "control" group. It should be noted a loss of the radial organization in the group "Alcohol”.
- I -VI Cortical layers; CC: Corpus callosum.
- C Distribution of orientation (angle categories) of cortical microvessels in the immature cortex of fetus GD20.
- FIG. 1 Effects of In utero Alcohol Exposure on Expression of VEGF / PIGF Family Members in Mouse E20 Embryos.
- AE Western blot quantification of protein levels of VEGFA (A), PIGF (B), sVEGF-RI (C), mVEGF-R1 (D) and VEGF-R2 in the cortex of the "Control” and “Alcohol” groups.
- F Western blot comparison of PIGF protein levels in the cortex and placenta of the E20 embryos of the "control” group. * p ⁇ 0.05; *** p ⁇ 0.001 vs the "Witness" group using an unpaired t-test.
- EH Images acquired by medium (E, F) and strong (G, H) electron microscopy showing the cellular morphology of giant trophoblasts and the presence of zonula occludens (arrows) in the "control” (E, G) and “Alcohol” (F, H). Zonula occludens (stars) is no longer visible in animals treated with alcohol.
- the inserts in E and F indicate the area observed at higher magnification at G and H, respectively.
- D maternal decidua
- J junction area
- L labyrinth area
- Tg layer of giant trophoblasts.
- FIG. 4 Effects of in utero alcohol exposure on the expression of proteins involved in the placental barrier and placental energy metabolism.
- A, B Immunohistochemical observation of the ZO-1 protein in the mouse placenta maze area of the "Control” (A) and "Alcohol” (B) groups. The ZO-1 protein appears to form groups of points (arrows) in the "Control” group while the labeling is diffuse in the "Alcohol” group. The trophoblast layers were demonstrated by immunoreactivity with the Glut-1 glucose transporter. The nuclei were marked at Hoechst.
- C Double labeling with antibodies against MCT-1 monocarboxylate transporters and glucose in the labyrinth zone of a "control" placenta.
- EH Immunohistochemistry tests illustrate the distribution of VEGF-R1 (E), Glut-1 (F, G) and PIGF (H) in layers of syncytiotrophoblasts from the mouse placenta. The nuclei were marked at Hoechst.
- FIG. 5 Effects of in utero alcohol exposure on the expression of VEGF / PIGF family members in murine placenta.
- AF Western blot quantification of effects of alcohol exposure during the last week of gestation on placental expression of VEGF-A (A), PIGF (B), sVEGF-RI (C), mVEGF-R1 (D), VEGF-R2 (E) and CD31 (F) to GD20.
- G, H Immunohistochemical labeling showing the distribution of VEGF-R2 (G) in Glut-1-labeled (H) labeled placenta syncytiotrophoblast layers. The nuclei were marked at Hoechst.
- FIG. 6 Diffusion of Evans blue and recombinant human PIGF injected in utero from the placenta into the fetal brain and effect of placental repression of PIGF on cerebral vasculature.
- A, B Time-course visualization of Evans Blue administered by microinjection into the placenta of a GD15-gravid mouse. The fluorescence was detected by UV illumination (A) and is represented using a dummy color scale (B).
- C, D Time-based visualization of Evans Blue fluorescence in the fetal brain following GD15 placental microinjection.
- E Quantification over time by spectrophotometry of the absorbance at 595 nm of the Evans blue signal injected into the placentas (E) and subsequently into the brains of the corresponding fetuses (F).
- G ELISA quantification of human PIGF in mouse fetal brain 30 min after injection of hPIGF into placentas of GD15 pregnant mice. * p ⁇ 0.05 vs the "control" group using an unpaired t-test.
- H Photomicrograph visualizing the expression of eGFP 48 hours after in utero transfection of GD15 pregnant mouse placenta with a plasmid encoding an eGFP.
- I, J Triple staining eGFP / Glut-1 / Hoechst indicating that the fluorescence of eGFP (I) is mainly associated with Glut-1-tagged fetal trophoblastic layer (J) (arrowheads). The fetal part of the trophoblastic layers is identified by the presence of nucleated red blood cells specific to the fetal circulation (arrows).
- K Western blot visualization of PIGF, GFP and actin proteins in placentas of non-transfected animals (sh- / GFP-), GFP-transfected (sh- / GFP +) and shPLGF / GFP transfected (sh + / GFP +).
- L, M Western blot quantification of PIGF (L) levels and expression of GFP (M) in placentas of non-transfected animals (sh- / GFP-), GFP-transfected (sh- / GFP +) and shPLGF / GFP transfected (sh + / GFP +) four days after transfection.
- N Western transfer quantification of VEGF-R1 expression levels in fetal brain from non-transfected (sh- / GFP-), GFP-transfected (sh- / GFP +) and shPLGF / GFP transfected placenta (sh + / GFP +) four days post-transfection. * P ⁇ 0.05 vs group "sh- / GFP" using one-way ANOVA followed by a post-hoc Tukey test.
- Figure 7 Morphometric characterization of the effects of in utero alcohol exposure on the human placenta from gestational weeks 20 to 25.
- A, B Immunohistochemical labeling against CD31 and counterstaining with toluidine blue to visualize microvessels (chestnuts) present in the placental villi (blue) of the "control” (A) and "FAS / pFAS” (B) groups at gestational ages [20-25 WG [.
- C Percentage of villi classified by size in the placentas of the "control” and "FAS / pFAS” groups at gestational ages [20-25 WG [.
- D Distribution of vessels by villous size in placentas of the "control” and "FAS / pFAS” groups at gestational ages [20-25 WG [.
- E Village vascular vascular surface area in the placentas of the "control” and "FAS / pFAS” groups at gestational ages [20-25 WG [. * P ⁇ .05 vs the control group using an unpaired t-test.
- Figure 8 Morphometric characterization of the effects of in utero alcohol exposure on the human placenta from gestational weeks 25 to 35.
- A, B Immunohistochemical labeling against CD31 and toluidine blue staining to visualize microvessels (chestnuts) present in Placental (blue) villi of the "control” (A) and "FAS / pFAS” (B) groups at gestational ages [25-35 WG [.
- C Percentage of villi classified by size in the placentas of the "control” and "FAS / pFAS” groups at gestational ages [25-35 WG [.
- D Distribution of vessels by villous size in placentas of the "control” and "FAS / pFAS” groups at gestational ages [25-35 WG [.
- E Vascular villous surface area in placentas of the "control” and “FAS / pFAS” groups at gestational age [25-35 WG [. * p ⁇ 0.05 vs the "control” group using an unpaired t-test.
- Figure 9 Morphometric characterization of the effects of in utero alcohol exposure on the human placenta from gestational weeks 35 to 42.
- A, B Immunohistochemical labeling against CD31 and toluidine blue staining to visualize the microvessels (chestnuts) present in placental villi (blue) groups' Witness "(A) and” FAS / pFAS "(B) at gestational ages ranging from [35-42 WG [. The luminal region of the microvessels is greatly reduced in the "FAS / pFas" group.
- C Percentage of villi classified by size in placentas of the "control” and "FAS / pFAS” groups at gestational ages ranging from [35-42 WG [.
- D Distribution of vessels by villous size in placentas of the "control” and “FAS / pFAS” groups at gestational ages ranging from [35-42 WG [.
- E Village-size vascular area in placentas of the "control” and "FAS / pFAS” groups at gestational ages ranging from [35-42 WG [. * p ⁇ 0.05 vs the "control” group using an unpaired t-test.
- Figure 10 Time-course effects of in utero alcohol exposure on villous and vessel densities in human placentas and western blot characterization of pro-angiogenic proteins and energy metabolism.
- A Evolution of villous densities in placentas of the "control” (A) and "FAS / pFAS” (B) groups at gestational age [20-25 WG [, [25-35 WG [and [35-42 WG [.
- B Evolution of vessel densities in placentas of the "control” and "FAS / pFAS” groups at gestational ages [20-25 WG [, [25- 35 WG [and [35-42 WG [.
- Figure 1 Comparison of cerebral and placental damage observed in human fetuses and induced by in utero alcohol exposure and statistical correlation.
- A-H Comparison of cerebral and placental damage observed in human fetuses and induced by in utero alcohol exposure and statistical correlation.
- I, J Statistical correlation between cortical vascular disorganization and placental vascular density in patients in the "Control" (I) and FAS / pFAS (J) groups.
- FIG. 12 Effects of overexpression of IFN in utero on fetal growth and cortical vascularization during intrauterine exposure to alcohol.
- A, B A PGF / CRISPR / dCas9 activation approach coupled to electroporation of the placenta in utero was performed at GD13 (A) and overexpression of PIGF was monitored at GD20 (B). In the "Alcohol" group, exposure to alcohol in utero takes place between GD15 and GD20.
- C, D Visualization of E20 fetuses from pregnant mice exposed to NaCl (C) or alcohol (D). It is worth noting the small size of fetuses exposed to alcohol.
- E F: Visualization of E20 fetuses from pregnant mice after electroporation in utero PGF / CRISPR-dCas9 plasmids in placentas of "control" groups (E) or pregnant mice exposed to alcohol (F).
- G, H Quantification of the size of the abdomen (G) and the whole fetus (H) in the group "Control” (NaCl) and in the group "Alcohol".
- IK Visualization of the vascular system in the fetal cortex E20 from control (NaCl) / non-transfected (I), transfected alcohol / CRISPR-cas9 (J) and alcohol PGF / CRISPR-dCas9 placentas transfected. It is noted that overexpression of PIGF at the placental level corrects the disorganization of the cerebral vasculature induced by alcoholization in utero.
- Figure 1 Effects of placental overexpression of PIGF on the size of the head and body of the fetus E20 in the "control" and “alcohol” groups.
- A, B Quantification of the size of the head (A) and the body (B) in the group “Control” (NaCl) and the group “Alcohol”.
- CRISPR-cas9 control plasmids black bars
- PGF CRISPR-dCas9 plasmids white bars.
- Examples A Abnormalities following alcohol abuse in utero Examples A below include several results of tests carried out prior to the present invention demonstrating that in mice and humans:
- morphometric analysis indicates that the distribution of placental vessels by villous size and vascular area are significantly impacted by alcoholization (Figure 10).
- a longitudinal analysis of vascular density taking into account the "age” factor indicates that in the "control” group, placental angiogenesis strongly increases between age groups [20-25GW [and [25-35GW [. This strong increase in placental vasculature is explained by significant brain development during the third trimester of pregnancy that requires increased oxygen and nutrient requirements.
- fetal alcoholization induces stagnation or even a decrease in placental vascular density (Figure 10).
- the present results indicate that there are vascular abnormalities in the human placenta as well as in the cerebral cortex in subjects who have been exposed to alcohol. These results therefore support the hypothesis of a correlation between brain disorders and placental deficits of angiogenesis.
- the CRISPR-dCas9 approach is an innovative gene overexpression method for identifying the role of endogenous proteins in processes of development.
- the PGF CRISPR-dCas9 activation plasmids (sc-42221 1 -ACT) constituting a complex of synergistic activation mediators (SAM) were designed and provided by Santa Cruz Biotechnology. SAM binds to a specific site upstream of the transcription initiation site of the PGF gene, thereby activating the endogenous transcription of the target gene.
- the PGF-CRISPR dCas9 activation plasmids are transfected by in utero electroporation to GD13 in two groups of mice ("Control" and "Alcohol"). Exposure to alcohol occurs between GD15 to GD20. A two-day delay between transfection of PGF CRISPR-dCas9 activation plasmids and alcohol treatment is required to allow for plasmid expression and overexpression of PLGF.
- control For a given pregnant mouse, 3 placentas were transfected with CRISPR-dCas9 PGF activation plasmids, 3 placentas were transfected with the CRISPR-cas9 control plasmids (sc-418922) targeting a non-specific 20 nt guide RNA (negative control). The other placentas are not transfected and are used as a control ("control" group).
- the overexpression of PIGF in the placenta of a pregnant mouse exposed to alcohol allows the complete disappearance of morphometric abnormalities in the abdomen and of the skull of the fetus caused by exposure to alcohol.
- the size of the skull and abdomen that is reduced following exposure to alcohol returns to normal after overexpression of PIGF
- overexpression of PIGF in the placenta of a pregnant mouse exposed to Alcohol allows the reduction of morphometric abnormalities in the body of the fetus and the whole fetus caused by exposure to alcohol.
- the size of the fetal body as well as the size of the whole fetus reduced during exposure to alcohol returns to almost normal after the overexpression of PIGF
- the overexpression of PIGF at the placental level allows the improvement of the cerebral angiogenesis of the fetus altered by exposure to alcohol of a pregnant mouse.
- the neuronal function of this fetus will thus be improved
- overexpression of PIGF can be used effectively as a drug in the treatment of FASD-like abnormalities, particularly to improve cerebral angiogenesis and / or restore the normal morphological appearance of the vascularization of the fetus with FASD.
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Abstract
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Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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KR1020197018530A KR20190109398A (ko) | 2016-12-01 | 2017-12-01 | 태아알콜증후군 장애(fasd)의 치료를 위한 태반 성장인자 |
EP17821808.7A EP3548060A1 (fr) | 2016-12-01 | 2017-12-01 | Facteur de croissance placentaire pour le traitement des troubles causes par l'alcoolisation foetale (tcaf) |
CA3045080A CA3045080A1 (fr) | 2016-12-01 | 2017-12-01 | Facteur de croissance placentaire pour le traitement des troubles causes par l'alcoolisation foetale (tcaf) |
AU2017367175A AU2017367175A1 (en) | 2016-12-01 | 2017-12-01 | Placental growth factor for the treatment of fetal alcohol syndrome disorders (FASD) |
US16/465,465 US20190351018A1 (en) | 2016-12-01 | 2017-12-01 | Placental growth factor for the treatment of fetal alcohol syndrome disorders (fasd) |
BR112019011141A BR112019011141A2 (pt) | 2016-12-01 | 2017-12-01 | fator de crescimento placentário, plgf para uso, composição farmacêutica e pigf ou composição para uso |
JP2019529500A JP2020503275A (ja) | 2016-12-01 | 2017-12-01 | 胎児性アルコール症候群障害(fasd)の治療のための胎盤増殖因子 |
CN201780084741.4A CN110225761A (zh) | 2016-12-01 | 2017-12-01 | 用于治疗胎儿酒精综合征障碍(fasd)的胎盘生长因子 |
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FR1661813A FR3059550B1 (fr) | 2016-12-01 | 2016-12-01 | Traitement des troubles causes par l'alcoolisation foetale (tcaf) |
FR1661813 | 2016-12-01 |
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KR (1) | KR20190109398A (fr) |
CN (1) | CN110225761A (fr) |
AU (1) | AU2017367175A1 (fr) |
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WO2019229253A1 (fr) * | 2018-05-30 | 2019-12-05 | Universite De Rouen Normandie | TRAITEMENT DES TROUBLES NEUROLOGIQUES AVEC LE PlGF |
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WO2020181263A1 (fr) * | 2019-03-06 | 2020-09-10 | San Diego State University (SDSU) Foundation, dba San Diego State University Research Foundation | Méthodes et systèmes de mesure et/ou de criblage en continu d'anomalies pour une analyse des troubles du spectre de l'alcoolisme fœtal |
KR20220044151A (ko) * | 2020-09-29 | 2022-04-06 | (주)세포바이오 | Plgf를 포함하는 신경정신질환의 예방 또는 치료용 조성물 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019229253A1 (fr) * | 2018-05-30 | 2019-12-05 | Universite De Rouen Normandie | TRAITEMENT DES TROUBLES NEUROLOGIQUES AVEC LE PlGF |
FR3081707A1 (fr) * | 2018-05-30 | 2019-12-06 | Universite De Rouen Normandie | Traitement des troubles neurologiques causes par l'alcoolisation foetale |
Also Published As
Publication number | Publication date |
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FR3059550A1 (fr) | 2018-06-08 |
US20190351018A1 (en) | 2019-11-21 |
EP3548060A1 (fr) | 2019-10-09 |
FR3059550B1 (fr) | 2020-01-03 |
CA3045080A1 (fr) | 2018-06-07 |
KR20190109398A (ko) | 2019-09-25 |
JP2020503275A (ja) | 2020-01-30 |
BR112019011141A2 (pt) | 2019-10-01 |
CN110225761A (zh) | 2019-09-10 |
AU2017367175A1 (en) | 2019-06-20 |
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