PMID- 6759227 OWN - NLM STAT- MEDLINE DCOM- 19830311 LR - 20190515 IS - 0012-1797 (Print) IS - 0012-1797 (Linking) VI - 31 IP - 2 DP - 1982 Feb TI - Selective binding of fluoresceinated-avidin to A-cells of sectioned pancreas. PG - 107-9 AB - Fluoresceinated-avidin (FITC-avidin) was observed to bind specifically to a subset of pancreatic islet cells in sections of both human and rat pancreas. FITC-avidin binding was inhibited by excess unlabeled avidin, and by biotin, but not by glucagon, somatostatin, or insulin. Labeling of islets with anti-insulin, anti-glucagon, anti-somatostatin, and anti-human pancreatic polypeptide antibodies showed the avidin binding subset to correspond to islet cells identified by anti-glucagon antibody. Conversely, avidin reacted with no insulin, somatostatin, or cells containing HPP. We conclude that avidin localizes specifically to A-islet cells. Binding may be to a biotin-containing enzyme within the A-cells, but the precise molecular site of binding is currently unidentified. FAU - Rowley, R F AU - Rowley RF FAU - Eisenbarth, G S AU - Eisenbarth GS LA - eng GR - AM 25778-01/AM/NIADDK NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Diabetes JT - Diabetes JID - 0372763 RN - 0 (Fluoresceins) RN - 0 (fluorescein isothiocyante avidin) RN - 1405-69-2 (Avidin) RN - 9006-59-1 (Ovalbumin) RN - I223NX31W9 (Fluorescein-5-isothiocyanate) SB - IM MH - Adult MH - Animals MH - Avidin/*analogs & derivatives MH - *Fluorescein-5-isothiocyanate/*analogs & derivatives MH - *Fluoresceins MH - Histocytochemistry MH - Humans MH - Islets of Langerhans/*cytology MH - Microscopy, Fluorescence MH - Ovalbumin/*analogs & derivatives MH - Rats MH - Rats, Inbred Lew MH - Rats, Inbred Strains EDAT- 1982/02/01 00:00 MHDA- 1982/02/01 00:01 CRDT- 1982/02/01 00:00 PHST- 1982/02/01 00:00 [pubmed] PHST- 1982/02/01 00:01 [medline] PHST- 1982/02/01 00:00 [entrez] AID - 10.2337/diab.31.2.107 [doi] PST - ppublish SO - Diabetes. 1982 Feb;31(2):107-9. doi: 10.2337/diab.31.2.107.