Increased Proliferation of the Pancreatic Duct Gland Compartment in Type 1 Diabetes.

Increased Proliferation of the Pancreatic Duct Gland Compartment in Type 1 Diabetes.

J Clin Endocrinol Metab. 2016 Nov 4;:jc20163001

Authors: Md Moin AS, Butler PC, Butler AE

Abstract
CONTEXT: Pancreatic duct glands (PDGs) have been proposed as a source of regeneration in response to exocrine pancreas injury, and thus may serve as an organ stem cell niche. There is evidence to suggest ongoing beta-cell formation in longstanding type 1 diabetes (T1D), but the source is unknown.
OBJECTIVE: To investigate the pancreatic duct gland (PDG) compartment of the pancreas in humans with T1D for evidence of an active regenerative signature (presence of progenitor cells and increased proliferation) and, in particular, as a potential source of beta-cells.
DESIGN, SETTING AND PARTICIPANTS: Pancreas from 46 brain dead organ donors (22 with T1D, 24 nondiabetic controls) were investigated for activation (increased proliferation) and markers of pancreatic exocrine and endocrine progenitors.
RESULTS: PDG cell replication was increased in T1D (6.3 ± 1.6 vs. 0.6 ± 0.1%, p < 0.001, T1D vs. ND), most prominently in association with pancreatic inflammation. There were increased progenitor-like cells in PDGs of T1D, but predominantly with an exocrine fate.
CONCLUSION: The PDG compartment is activated in T1D consistent with a response to ongoing inflammation, and via resulting ductal hyperplasia may contribute to local obstructive pancreatitis and eventual pancreatic atrophy characteristic of T1D. However, there is no evidence of effective endocrine cell formation from PDGs.

PMID: 27813705 [PubMed - as supplied by publisher]

http://ift.tt/2f3PlDA