Cultured pancreas islets
First Claim
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1. A method of preparing pancreatic islets, comprising:
- culturing pancreatic islets obtained from a donor pancreas ex vivo in the presence of a donor tissue material in a culturing medium comprising at least a detectable amount of acinar tissue obtained from the donor pancreas;
whereinthe donor tissue material is produced by distending and dissociating a pancreas orpancreas tissueby ductal infusion of a collagenase enzyme, andthe islets are dispersed in the culture medium, and the islets are present in an amount less than about 70% and greater than about 20% of the total area of the acinar tissue and an endocrine tissue present in the culture medium, the amount of islets being calculated by the ratio of the area encompassed by the islets to the total area of acinar tissue and endocrine tissue present in the culture medium; and
forming pancreatites in the culture medium via aggregation of the acinar tissue and the dispersed islets;
whereinthe islets were obtained from a donor selected from the group consisting of a non-adult donor and a juvenile donor,the islets comprise immature islets, andthe culture medium is present on a gas permeable membrane.
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Abstract
Methods of preparing pancreatic islets that may comprise pancreatites are provided. The methods may involve subjecting a pancreas and/or pieces thereof to disruption, such as, for example, an enzyme digest, and seeding the recovered cellular product comprising islets in a culture medium comprising at least a detectable amount of endocrine tissue and/or exocrine tissue.
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Citations
11 Claims
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1. A method of preparing pancreatic islets, comprising:
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culturing pancreatic islets obtained from a donor pancreas ex vivo in the presence of a donor tissue material in a culturing medium comprising at least a detectable amount of acinar tissue obtained from the donor pancreas;
whereinthe donor tissue material is produced by distending and dissociating a pancreas or pancreas tissue by ductal infusion of a collagenase enzyme, and the islets are dispersed in the culture medium, and the islets are present in an amount less than about 70% and greater than about 20% of the total area of the acinar tissue and an endocrine tissue present in the culture medium, the amount of islets being calculated by the ratio of the area encompassed by the islets to the total area of acinar tissue and endocrine tissue present in the culture medium; and forming pancreatites in the culture medium via aggregation of the acinar tissue and the dispersed islets;
whereinthe islets were obtained from a donor selected from the group consisting of a non-adult donor and a juvenile donor, the islets comprise immature islets, and the culture medium is present on a gas permeable membrane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for preparing pancreatites, comprising:
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treating donor tissue comprising pancreatic islets via digestion with an enzyme to obtain cellular product comprising islets and a detectable amount of exocrine tissue comprising acinar tissue; seeding the cellular product comprising the islets and the detectable amount of exocrine tissue comprising acinar tissue into a culture medium to form a culture medium comprising dispersed islets;
whereinthe islets are present in an amount less than about 60% and greater than about 20% of the total area of acinar tissue and endocrine tissue present in the culture medium, the amount of islets being calculated by the ratio of the area encompassed by the islets to the total area of acinar tissue and endocrine tissue present in the culture medium; aggregating the exocrine tissue and the dispersed islets to form pancreatites in the culture medium;
whereinthe islets were obtained from a donor selected from the group consisting of a non-adult donor and a juvenile donor, the islets comprise immature islets, and the culture medium is present on a surface of a gas permeable membrane. - View Dependent Claims (10, 11)
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Specification