Preparation and xenotransplantation of porcine islets
First Claim
Patent Images
1. A method of preparing a xenotransplantable islet comprising in sequential order the steps of:
- (i) harvesting the pancreas of a piglet, said piglet having an age of between −
20 to +10 days relative to full-term gestation,(ii) exposing said harvested pancreas to nicotinamide,(iii) exposing said harvested pancreas to lignocaine; and
(iv) extracting pancreatic β
islet cells from said harvested pancreas and simultaneously contacting said pancreatic β
islet cells with a quinolone antibiotic, wherein said method results in said xenotransplantable islet.
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Abstract
The invention relates to developments in the treatment of diabetes in mammals. Particularly it relates to a method of preparing a xenotransplantable porcine islet preparation capable upon xenotransplantation of producing porcine insulin in an appropriate recipient mammal, the method including or comprising the steps of:
- (I) harvesting the pancreas of piglets at or near full term gestation, and
- (ii) extracting pancreatic β islet cells from the harvested pancreas wherein the islets (at least at some stage in the performance of the method) are exposed to nicotinamide.
Further, the invention relates to a method of encapsulation of a xenotransplantable porcine islet preparation, and transplantation of such a preparation, or a capsule containing such a preparation, into an appropriate recipient mammal.
34 Citations
17 Claims
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1. A method of preparing a xenotransplantable islet comprising in sequential order the steps of:
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(i) harvesting the pancreas of a piglet, said piglet having an age of between −
20 to +10 days relative to full-term gestation,(ii) exposing said harvested pancreas to nicotinamide, (iii) exposing said harvested pancreas to lignocaine; and (iv) extracting pancreatic β
islet cells from said harvested pancreas and simultaneously contacting said pancreatic β
islet cells with a quinolone antibiotic, wherein said method results in said xenotransplantable islet. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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2. A method of preparing a xenotransplantable porcine islet, said method comprising in sequential order at least the steps of:
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(i) harvesting a pancreas of a piglet, the piglet having an age of between −
20 to +10 days relative to full-term gestation,(ii) exposing said harvested pancreas to nicotinamide, and (iii) extracting pancreatic β
islet cells from said harvested pancreas and simultaneously contacting said pancreatic β
islet cells with ciprofloxacin;
wherein said method results in said xenotransplantable porcine islet.
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3. A method of preparing a xenotransplantable porcine islet, said method comprising in sequential order at least the steps of:
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(i) harvesting a pancreas of a piglet, said piglet having an age of between −
20 to +10 days relative to full-term gestation,(ii) exposing said harvested pancreas to nicotinamide, and (iii) extracting pancreatic β
islet cells from said harvested pancreas and simultaneously contacting said pancreatic β
islet cells with lignocaine, wherein said method results in said xenotransplantable porcine islet.
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4. A method of preparing a xenotransplantable porcine islet comprising in sequential order the steps of:
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(i) harvesting the pancreas of a piglet, the piglet having an age of between −
20 to +10 days relative to full-term gestation,(ii) exposing said harvested pancreas to nicotinamide, (iii) exposing said harvested pancreas to ciprofloxacin; and (iv) extracting pancreatic β
islet cells from said harvested pancreas and simultaneously contacting said pancreatic β
islet cells with a trauma-protecting agent, wherein said method results in said xenotransplantable islet. - View Dependent Claims (15, 16, 17)
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5. A method of preparing a xenotransplantable porcine islet, comprising in sequential order the steps of:
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(i) harvesting the pancreas of a piglet, the piglet having an age of between −
20 to +10 days relative to full term gestation,(ii) exposing the harvested pancreas to a trauma-protecting agent lignocaine, (iii) exposing the harvested pancreas to nicotinamide, and (iv) extracting pancreatic β
islet cells from the harvested pancreas and simultaneously contacting the pancreatic β
islet cells with a quinolone antibiotic;
the method resulting in a xenotransplantable islet.
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6. A method of preparing a xenotransplantable porcine islet comprising in sequential order the steps of:
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(i) harvesting the pancreas of a piglet, the piglet having an age of between −
20 to +10 days relative to full term gestation,(ii) exposing the harvested pancreas to the quinolone antibiotic ciprofloxacin, (iii) exposing the harvested pancreas to nicotinamide, and (iv) extracting pancreatic β
islet cells from the harvested pancreas and simultaneously contacting the pancreatic β
islet cells with a trauma protecting agent lignocaine;
the method resulting in a xenotransplantable islet.
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7. A method of preparing a xenotransplantable porcine islet comprising in sequential order the steps of:
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(i) harvesting the pancreas of a piglet, said piglet having an age of between −
20 to +10 days relative to full-term gestation;(ii) exposing said harvested pancreas of said piglet to nicotinamide; (iii) exposing said harvested pancreas to lignocaine; (iv) extracting pancreatic β
islet cells from said harvested pancreas in the presence of a suitable collagenase; and
(v) contacting said extracted pancreatic β
islet cells with a quinolone antibiotic, wherein said method results in the preparation of said xenotransplantable porcine islet.
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8. A method of preparing a xenotransplantable porcine islet comprising in sequential order the steps of:
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(i) harvesting the pancreas of a piglet, said piglet having an age of between −
20 to +10 days relative to full-term gestation;(ii) exposing said harvested pancreas of said piglet to nicotinamide; (iii) exposing said harvested pancreas to a trauma-protecting agent; (iv) extracting pancreatic β
islet cells from said harvested pancreas in the presence of a suitable collagenase; and(v) contacting said extracted pancreatic β
islet cells with the quinolone antibiotic ciprofloxacin, wherein said method results in the preparation of said xenotransplantable porcine islet.
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Specification