Abstract:
OBJECTIVES:We investigated the relationship of pancreatic regenerating protein (reg) in models of acinar cell atrophy and aging, and the effect of reg I protein replacement on glucose tolerance. METHODS:Rats underwent pancreatic duct ligation (PDL) and were followed through 12 months. Aging rats were studied at 12 and 20 months. Intraperitoneal glucose tolerance tests (IPGTTs) were performed, pancreatic reg I, reg I receptor, insulin gene expression, and reg I protein levels were measured. Pancreatic duct ligation and aged animals were treated with exogenous reg I protein and assessed for glucose metabolism. RESULTS:After PDL, chronic atrophic pancreatitis developed, with a progressive loss of acinar cells and pancreatic reg I. During aging, a similar depression of reg I gene expression was also noted. The reg I levels correlated with pancreatic insulin levels. Twelve months after PDL, IPGTT results were abnormal, which were significantly improved by administration of reg I protein. Aged animals demonstrated depressed IPGTT, which marginally improved after reg I administration. Anti-reg antibody administration to young rats depressed IPGTT to elderly levels. CONCLUSIONS:Depletion of the acinar product reg I is associated with the pathogenesis of impaired glucose tolerance of pancreatitis-associated diabetes and aging, and replacement therapy could be useful in these patients. Reg I is an acinar cell product, which affects islet function.
journal_name
Pancreasjournal_title
Pancreasauthors
Bluth M,Mueller CM,Pierre J,Callender G,Kandil E,Viterbo D,Fu SL,Sugawara A,Okamoto H,Zenilman MEdoi
10.1097/MPA.0b013e31817f7893subject
Has Abstractpub_date
2008-11-01 00:00:00pages
386-95issue
4eissn
0885-3177issn
1536-4828pii
00006676-200811000-00007journal_volume
37pub_type
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