WO1993007900A1 - Perfusion in vitro de greffes de reins avec des anticorps - Google Patents
Perfusion in vitro de greffes de reins avec des anticorps Download PDFInfo
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- WO1993007900A1 WO1993007900A1 PCT/GB1992/001890 GB9201890W WO9307900A1 WO 1993007900 A1 WO1993007900 A1 WO 1993007900A1 GB 9201890 W GB9201890 W GB 9201890W WO 9307900 A1 WO9307900 A1 WO 9307900A1
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- antibody
- kidney
- mab
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/289—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against CD45
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N1/00—Preservation of bodies of humans or animals, or parts thereof
- A01N1/10—Preservation of living parts
- A01N1/12—Chemical aspects of preservation
- A01N1/122—Preservation or perfusion media
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N1/00—Preservation of bodies of humans or animals, or parts thereof
- A01N1/10—Preservation of living parts
- A01N1/12—Chemical aspects of preservation
- A01N1/122—Preservation or perfusion media
- A01N1/126—Physiologically active agents, e.g. antioxidants or nutrients
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N1/00—Preservation of bodies of humans or animals, or parts thereof
- A01N1/10—Preservation of living parts
- A01N1/16—Physical preservation processes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- This invention relates to the treatment of kidney grafts to reduce the risk of rejection. More particularly it relates to the perfusion of kidneys in vitro with a liquid containing antibodies directed against passenger leukocytes in the kidney.
- the technique reported involved the preparation of vials containing 2 mg of each antibody in 2 ml phosphate buffered saline.
- the allograft was prepared for transplantation by standard method.
- the renal veins were clamped and the contents of the vial in 50 ml Marshall's solution at 4°C were injected into the renal arteries.
- Biopsy specimens were taken from the majority of transplants prior to wound closure and used to measure allograft uptake of anti-CD45 mAbs. The authors reported that the perfusion technique needs to be improved, as at least 25% of the grafts were poorly perfused with an antibody uptake of less than 50%.
- the renal vein should be clamped (occluded) during perfusion, so that a hydrostatic pressure is built up, presumably causing the perfusate and antibody to move into the interstitium of the kidney.
- the volume of liquid is suitably about 50 ml.
- a small improvement may be obtained by using higher volumes, eg 100 ml, but the risk of rupture of some part of the organ places a practical limit on the volume in the interests of safety, suggesting that volumes significantly higher than 100 ml are best avoided.
- the concentration of monoclonal antibody would seem to be suitably about 40 ⁇ g/ml. This value would apply to each antibody species if there is more than one to be used. Thus, for example, if the objective is to target a lytic antibody to the passenger leukocytes, then a single lytic mAb could be applied at 40 ⁇ g/ml, or a lytic pair (such as YTH24.5 YTH54.12) applied at 40 ⁇ g/ml each.
- This low (CI) temperature is not a specific value, but rather is generally that which is achieved by keeping the organ on (melting) ice. It will therefore normally be expected to be in the range 0-4°C, but may rise somewhat, say to 8°C. This latter could particularly be the case when the organ is perfused, since the perfusion liquid will normally have been kept in a refrigerator, where the temperature is not strictly regulated, but may be as high as 8-10°C, even though ideally it should be rather lower, eg around 4-6°C.
- the organ will warm up from its CI condition to a WI condition.
- its temperature will be that of the recipient's body when the blood flow is established, but during the operation the organ will warm up prior to opening the blood vessels, possibly reaching a temperature as high as 20°C or so, which would still be regarded as WI, since biological functions, and consequent deterioration of the organ in vitro, are generally active at such temperatures.
- the present disclosure contemplates incubation of the organ with the mAb in vitro under CI conditions (say, less than 12°C, and preferably less than 8°C) for a period prior to allowing WI conditions to occur during the surgical procedure.
- This CI incubation time with the mAb is preferably at least 20 minutes, and may be longer, as the data show. This produces a very significant improvement in the % antibody uptake over that reported in Brewer 1989 (supra) and also good antibody saturation levels.
- the clinical data presented herewith also demonstrate an apparent correlation of this improvement with reduced incidence of graft rejection.
- Kidneys were obtained from outbred pigs at an abattoir, typically after 20-30 minutes of warm ischaemia. The kidneys were perfused on site via the renal artery, with cold organ preservation solution (OPS * , Royal Free Hospital, London). Kidneys were cold-perfused until the venous effluent, appeared colourless (400-500ml). They were then sealed in polythene bags containing cold OPS, stored on ice, and returned to the laboratory. After the appropriate cold ischaemia time (CIT, see later), redundant non-renal tissue was dissected off, and the kidneys were weighed. The renal veins were next isolated and clamped. * The composition of this is given in Appendix 1 of this description.
- the mAb employed was a mouse IgG2a anti-pig CD45 (common epitope), Pgl/45.9 (cell line provided by Dr Richard Binns, AFRC, Babraham, Cambridge, England and antibody purified by Cantab Pharmaceuticals Research Limited).
- the mAb was diluted in various volumes of cold OPS, in 50ml plastic syringes (Sherwood Medical, Ballymoney, Northern Ireland).
- a 2.6mm diameter Medicut cannula was cut short, and placed on the end of the syringe. This was introduced into the renal artery, which was then sealed by finger pressure alone.
- the mAb solution was slowly injected at a constant rate of 20ml/minute. The syringe was then removed, and the renal artery left patent (only minimal mAb reflux was observed).
- the kidneys were returned to the polythene bags employed previously, and again stored on ice. After varying periods of incubation, wedge biopsies were taken, layed on 1.5cm 2 cork tiles coated with Cryo-M-Bed embedding compound (Bright Instrument Co. Ltd., Huntingdon, England), covered with further Cryo-M-Bed, and snap-frozen in liquid nitrogen. Biopsies were stored at -70°C.
- Study Design Determination of optimal concentration and incubation times of perfused antibody.
- Three groups of five kidneys were perfused with 4, 2 or 1 mg mAb diluted in 100ml OPS (effective concentrations of 40, 20 and 10 ⁇ g/ml respectively).
- a volume of 100ml was chosen as this was found to be the largest volume that would not visibly over-distend the kidney or renal vein.
- Cortical wedge biopsies were then taken at 20, 40 and 60 minutes, 2, 4, 8 and 14 hours post-mAb perfusion.
- One kidney was subsequently perfused with 6 mg, and one with 8 mg mAb, in 100 ml OPS.
- CD45+ cells labelled by perfused antibody would stain red.
- Pgl/45.9 50 ⁇ g/ml in TBS/BSA was incubated on the sections for one hour at room temperature, which would bind to any CD45 antigens not bound by the perfused antibody.
- Detection was by the subsequent application of 5nm colloidal gold-conjugated goat anti-mouse (GAM) Igs (Biocell Research Laboratories, Edinburgh, UK) for one hour, diluted 1:25 in 5% dried milk powder in TBS.
- GAM colloidal gold-conjugated goat anti-mouse
- a negative control perfusion was performed, where one kidney of a pair was perfused with lmg of the mouse IgG2a monoclonal myeloma protein UPC10 (Sigma M7769), diluted in 100 mis OPS, whilst the contra-lateral kidney was perfused with lmg of PG1/45.9 diluted in the same volume.
- Non ⁇ specific binding of slide-applied Pgl/45.9 was checked by comparing the labelling produced on unperfused pig kidney sections with that produced by substitution of the primary with TBS/BSA or UPC10.
- Cross-reactivity of the GAM-gold reagent with the RAM-AP reagent was checked each time a new supply or either of these reagents was obtained, by double- labelling perfused kidney sections as described above, but substituting TBS/BSA for Pgl/45.9.
- Cell counting Biopsies were examined under high power (x400) using a Leitz Laborlux microscope. Field area was calculated as 0.15mm 2 using a stage micrometer (Graticules Ltd.). The field was divided into four quadrants with a cross-lines graticule (Graticules Ltd. ) to aid cell counting. Any cell stained red or black within the interstitium was considered a CD45+ cell.
- Results are expressed as the median (and range) of the five kidneys within each group. Comparisons of percentage uptake and saturation scores between biopsies and kidneys were made by Wilcoxon rank sum analysis.
- the median cold ischaemia time prior to mAb perfusion for these 15 kidneys was 3 hours (range 3 - 4 hours).
- the variation in mAb uptake and antigen saturation with time is shown in Tables la and lb.
- mAb uptake can be seen to have been rapid, and was maximal within one hour of mAb perfusion.
- mAb % uptake was similarly good in kidneys perfused with any of the three volumes, whilst CD45 antigen saturation by perfused mAb was consistently better with 40 ⁇ g/ml than with 20 or lO ⁇ g/ml, reaching statistical significance at several time points. No improvement in uptake was seen in two kidneys perfused with 60 or 80 ⁇ g/ml mAb (% uptake 100% and 100%, saturation score 3.0 and 4.0 respectively).
- Double-staining of the ureteric biopsies revealed that CD45+ cells in the urothelium were well labelled by perfused antibody (median % uptake 100% in all three groups), but that CD45+ cells within the lamina intestinal were variably labelled, with no clear relation to perfusate volume.
- kidney grafts The effectiveness of anti-dendritic cell treatment of kidney grafts will depend on the specific elimination or inactivation of most or all of these cells, without causing graft damage.
- the perfusion of monoclonal antibodies into kidneys prior to transplantation offers a means of targeting such cells.
- Antibody uptake was essentially homogeneous in both the cortex and medulla, using the larger perfusate volumes, and this effect was not diminished by longer cold ischaemia times.
- HK1 The first, "HK1", was obtained as a nephrectomy from a patient with severe renal artery stenosis. Consequently the organ was diseased, shrunken and scarred.
- the cold ischaemia time for this kidney was 7 hours (i.e. prior to antibody perfusion).
- the kidney was perfused (by injection into renal artery) with 4 mg of the rat anti-human IgG2b mAb pair YTH 24.5 and YTH 54.12 [2mg of each antibody] .
- the total 4 mg mAb was given in a total volume of only 50 ml preservation fluid (RFS) owing to the very small size of this particular kidney.
- RFS ml preservation fluid
- each individual antibody was injected into the kidney at a concentration of 40 ⁇ g/ml to provide a total dose of 2 mg of each antibody.
- the 50 ml volume containing the 2 mg of each antibody was injected over 2.5 minutes.
- the kidney was left to incubate for 12 hours, and then washed out with 300 mis of ice-cold (approximately 4°C) organ preservation fluid.
- the washing with preservation fluid was carried out by use of a 1 m gravity controlled drip and took approximately 5 minutes.
- Measurement of the amount of mAbs which leaked out of the kidney during perfusion, 12 hour incubation, and which were washed out of the kidney were made by collecting of the fluid, and analysis of mAb concentration by a rat IgG2b EIA.
- HK2 and 3 A pair of human kidneys ( "HK2 and 3") from a single organ donor became available after they were rejected for transplantation purposes in view of mild renal artery stenosis, though the kidneys were normal macroscopically.
- HK2 was perfused with 4mg of anti-human CD45 mAb pair YTH 24.5 and YTH 54.12 (2 mg of each antibody).
- the total 4 mg mAb was given in a total volume of 100 mis.
- each individual antibody was injected into the kidney at a concentration of 20 ⁇ g/ml to provide a total dose of 2 mg of each antibody.
- the 100 ml volume at 20 ⁇ g/ml was divided between two 50 mis syringes.
- the slides were then given three further two-minute TBS washes followed by 10 minute reincubations with rabbit anti-rat and rat APAAP reagents respectively, with three two minute TBS washes between and after them.
- Alkaline phosphatase substrate was then filtered onto the slides and left for 20 minutes.
- the substrate was composed of naphthol AS-MX di- sodium phosphate salt (Sigma) and Fast Red salt TR (Sigma), with levamisole added to block endogenous alkaline phosphatase activity.
- Table 3 shows the uptake and saturation of antibody onto human kidneys using the perfusion protocol developed in the pig.
- the double staining protocol used is shown in Appendix 2.
- Fig. 3 is a graph showing the relative binding of the two antibodies to a CD45-positive human B cell line called Raji. Relative binding is measured as the mean fluorescence intensity (MFI) in a FACS apparatus.
- MFI mean fluorescence intensity
- the graph in Fig. 4 shows the percentage of maximal activity of the antibody pair binding to Raji cells compared to the percentage maximal activity of lysis of Raji cells coated with anti CD45 antibodies in the presence of human complement.
- the antibody concentration in ⁇ g/ml is the total immunoglobulin concentration while the antibodies are reacting with the cells.
- the concentration of each antibody separately is one half of the amount shown.
- the lysis measured by 51 Cr release was carried out essentially as described in Bindon et al 3 replacing Raji cells for human lymphocytes.
- the antibody binding experiment was carried out as follows. 250,000 Raji cells in 25 microlitres of phosphate buffered saline containing 1% BSA (FACS buffer) were incubated with 25 microlitres of the different concentration of immunoglobulin. After one hour at 4°C the cells were washed three times and the antibody bound to the surface of the cells detected by using a saturating amount of an FITC conjugated affinity purified anti-rat immunoglobulin. The cells were incubated for a further 30 minutes at 4°C washed twice in FACS buffer and once in PBS 1% BSA. The cells were finally resuspended and analyzed on a Becton Dickinson FACS scan using standard procedures.
- Rat APAAP (Dako D488) 1/25 in TBS/1%BSA, 30 mins RT
- Biotinylated rat anti-human CD45 (YTH 24.5/54.12 1:1, Cantab Pharmaceuticals Research Ltd), 5 ⁇ g each Mab/ml in TBS/1%BSA 1 hour RT
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Abstract
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP92921156A EP0610257A1 (fr) | 1991-10-18 | 1992-10-15 | Perfusion in vitro de greffes de reins avec des anticorps |
JP5507533A JPH07500331A (ja) | 1991-10-18 | 1992-10-15 | 腎臓の移植片の生体外抗体灌流 |
BR9206649A BR9206649A (pt) | 1991-10-18 | 1992-10-15 | Processo para o tratamento in vitro de um rim antes do transplante em um receptor humano |
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GB919122160A GB9122160D0 (en) | 1991-10-18 | 1991-10-18 | Delivery of biological substances |
GB9122160.6 | 1991-10-18 | ||
GB929217344A GB9217344D0 (en) | 1991-10-18 | 1992-08-14 | Delivery of biological substances |
GB9217344.2 | 1992-08-14 |
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WO1993007900A1 true WO1993007900A1 (fr) | 1993-04-29 |
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PCT/GB1992/001890 WO1993007900A1 (fr) | 1991-10-18 | 1992-10-15 | Perfusion in vitro de greffes de reins avec des anticorps |
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Country | Link |
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EP (1) | EP0610257A1 (fr) |
JP (1) | JPH07500331A (fr) |
AU (1) | AU2695492A (fr) |
BR (1) | BR9206649A (fr) |
CA (1) | CA2121235A1 (fr) |
WO (1) | WO1993007900A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995013093A1 (fr) * | 1993-11-10 | 1995-05-18 | Leiden University | Traitement d'un patient avant une transplantation |
FR2763072A1 (fr) * | 1997-05-12 | 1998-11-13 | Pasteur Merieux Serums Vacc | Utilisation d'un anticorps monoclonal anti-lfa1 en transplantation renale |
WO1999026974A1 (fr) * | 1997-05-27 | 1999-06-03 | Arch Development Corporation | Proteines et peptides stimulant la croissance in vitro et in vivo pour cellules epitheliales renales |
US5922598A (en) * | 1995-03-24 | 1999-07-13 | Organ, Inc. | Reducing tissue immunogenicity by induction of apoptosis |
RU2169009C2 (ru) * | 1994-04-25 | 2001-06-20 | Трастиз Оф Дартмут Колледж | Способы индуцирования т-клеточной толерантности к тканевому или органному трансплантату |
Families Citing this family (1)
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KR20210132644A (ko) * | 2018-12-18 | 2021-11-04 | 캐터펄트 테라퓨틱스 비.브이. | 이식편 대 숙주 질환(GvHD)의 예방 또는 치료를 위한 항-CCR7 mAb의 용도 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991005568A1 (fr) * | 1989-10-20 | 1991-05-02 | Lynxvale Ltd. | Materiaux et procedes de traitement de tissu etranger |
-
1992
- 1992-10-15 AU AU26954/92A patent/AU2695492A/en not_active Abandoned
- 1992-10-15 JP JP5507533A patent/JPH07500331A/ja active Pending
- 1992-10-15 WO PCT/GB1992/001890 patent/WO1993007900A1/fr not_active Application Discontinuation
- 1992-10-15 CA CA002121235A patent/CA2121235A1/fr not_active Abandoned
- 1992-10-15 EP EP92921156A patent/EP0610257A1/fr not_active Withdrawn
- 1992-10-15 BR BR9206649A patent/BR9206649A/pt not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1991005568A1 (fr) * | 1989-10-20 | 1991-05-02 | Lynxvale Ltd. | Materiaux et procedes de traitement de tissu etranger |
Non-Patent Citations (6)
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995013093A1 (fr) * | 1993-11-10 | 1995-05-18 | Leiden University | Traitement d'un patient avant une transplantation |
RU2169009C2 (ru) * | 1994-04-25 | 2001-06-20 | Трастиз Оф Дартмут Колледж | Способы индуцирования т-клеточной толерантности к тканевому или органному трансплантату |
US5922598A (en) * | 1995-03-24 | 1999-07-13 | Organ, Inc. | Reducing tissue immunogenicity by induction of apoptosis |
FR2763072A1 (fr) * | 1997-05-12 | 1998-11-13 | Pasteur Merieux Serums Vacc | Utilisation d'un anticorps monoclonal anti-lfa1 en transplantation renale |
WO1998051343A1 (fr) * | 1997-05-12 | 1998-11-19 | Imtix-Sangstat | Utilisation d'un anticorps monoclonal anti-lfa1 en transplantation renale |
WO1999026974A1 (fr) * | 1997-05-27 | 1999-06-03 | Arch Development Corporation | Proteines et peptides stimulant la croissance in vitro et in vivo pour cellules epitheliales renales |
Also Published As
Publication number | Publication date |
---|---|
AU2695492A (en) | 1993-05-21 |
JPH07500331A (ja) | 1995-01-12 |
EP0610257A1 (fr) | 1994-08-17 |
BR9206649A (pt) | 1995-10-24 |
CA2121235A1 (fr) | 1993-04-29 |
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