Abstract:
:We have previously shown a specific significant overexpression in the exocrine pancreatic tissue of two members of the regenerating gene multifamily: reg I and reg II in the non-obese diabetic (NOD) mouse during active diabetogenesis. To strengthen the hypothesis that the overexpression of these genes may represent a defence of the acinar cell against pancreatic endocrine agression, we studied the pancreatic expression and the localization of another member of this family: the pancreatitis-associated protein (PAP) in NOD mice under the same conditions. We found that NOD mice present significantly higher PAP mRNA levels than control IOPS-OF1 mice. There is no difference between female NOD mice which progressively develop type I diabetes between 100 and 200 days and male NOD mice which are protected. The only difference observed was in function of the age of onset of diabetes. Before 180 days, the PAP mRNA levels were similar to those found in NOD males and nondiabetic females, but above 180 days the levels of PAP mRNA increased significantly. More importantly immunohistological studies demonstrate a striking difference in the protein localization between normal or nondiabetic NOD mice and diabetic NOD mice. If the protein is mainly detected in the islet cells in the absence of diabetes, a specific and intense expression of PAP was observed in the acinar cells of diabetic NOD mice. In conclusion, our data demonstrates that the acinar cells may react to a long-lasting pancreatic endocrine aggression by an induction of PAP and underlines the existence of a symbiotic relationship between endocrine and exocrine tissue.
journal_name
Digestionjournal_title
Digestionauthors
Baeza N,Sanchez D,Christa L,Guy-Crotte O,Vialettes B,Figarella Cdoi
10.1159/000048867subject
Has Abstractpub_date
2001-01-01 00:00:00pages
233-9issue
4eissn
0012-2823issn
1421-9867pii
48867journal_volume
64pub_type
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