Treatment for hyperglycemia promotes pancreatic regeneration in rats without CCK-1 receptor gene expression.

Abstract:

INTRODUCTION AND AIM:Recent studies have suggested that CCK is not essential for normal pancreatic growth in mice. We examined whether the treatment of hyperglycemia participates in a non-CCK-1-receptor-mediated mechanism of pancreatic regeneration after partial (30%) pancreatectomy (Px) with use of Otsuka Long-Evans Tokushima Fatty (OLETF) rats, an animal model for type 2 diabetes mellitus without CCK-1 receptor gene expression. METHODOLOGY:Male OLETF rats were divided into five groups at 24 weeks of age. The first group was killed to examine the pancreas at 24 weeks of age (PrePx). The second group underwent a midline laparotomy and received a standard rat chow (ShamPx). The remaining three groups of rats received one of the following three treatments after Px: a standard rat chow (PxC), a diet containing acarbose (PxA), or a standard rat chow and once-daily subcutaneous injection of insulin (PxI) for 8 weeks. RESULTS:PxC rats had significantly higher serum glucose levels than did PxA and PxI rats. Pancreatic weight and pancreatic contents of protein in PxA and PxI rats were significantly higher than in PxC rats. The pancreas in PxC rats was atrophic, and marked inflammatory cell infiltration was observed in the pancreas. In addition, tumor necrosis factor-alpha (TNFalpha) was expressed in the inflammatory cells, acinar cells, and islets in PxC rats. However, histologic alterations, including expression of TNFalpha, remained at a minimum in PxA and PxI rats. CONCLUSION:We conclude that the control of serum glucose levels plays an important role in preventing pancreatic atrophy and participates in the non-CCK-1-receptor-mediated mechanisms of pancreatic growth in rats.

journal_name

Pancreas

journal_title

Pancreas

authors

Yamamoto M,Jia DM,Fukumitsu K,Otsuki M

doi

10.1097/00006676-200305000-00010

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

368-74

issue

4

eissn

0885-3177

issn

1536-4828

journal_volume

26

pub_type

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