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. 1976 Jan;57(1):47–52. doi: 10.1172/JCI108267

Maintenance of insulin release from pancreatic islets stored in the cold for up to 5 weeks.

B J Frankel, E Gylfe, B Hellman, L A Idahl
PMCID: PMC436623  PMID: 1107356

Abstract

Insulin content and release were measured from hand-dissected pancreatic islets from noninbred ob/ob mice after 1-5 wk storage in tissue culture medium 199 at various temperatures and glucose concentrations. After storage of islets for 1 wk at 37 degrees, 22 degrees, or 8 degrees C in 18 mM glucose medium and preincubation with 1 mM glucose, glucose-stimulated insulin release during the subsequent incubation was only 20-35% of that of fresh islets. The addition of a 4-h period at 37 degrees C with 18 mM glucose between the cold storage and perincubation restored glucose-stimulated insulin release from 8 degrees C stored islets to fresh-islet levels. Release throughout the 1-18 mM glucose range was strikingly parallel to that of fresh islets. Exposure of fresh islets to the same 4-h period increased basal release but did not affect maximal release. When islets were stored at 8 degrees C with 18 mM glucose for more than 1 wk, a short period at 37 degrees C every week was necessary for maintenance of release. After 5 wk of this procedure, glucose-stimulated insulin release was one-third that of fresh islets, or similar to that of islets stored for only 1 wk at 37 degrees C. Storage at 8 degrees C for 1 wk with 3 mM glucose, or continuously for 3 or 5 wk with 18 mM glucose, maintained islet insulin content, whereas release was lost. Thus, glucose-stimulated insulin release is best maintained by storage of pancreatic islets in tissue culture medium with a high concentration of glucose at 8 degrees C with short weekly periods at 37 degrees C.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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