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• W2147889295 abstract "The basic helix-loop-helix transcription factor pancreas-specific transcription factor 1alpha (PTF1alpha)/p48 is critical for committing cells to a pancreatic fate and for the maintenance of the differentiated state in acinar cells. The aim was to analyze the ability of p48 to modulate cell proliferation, its relationship with cell differentiation, and the mechanisms involved therein.Pancreatic and nonpancreatic cells were transfected with p48 cDNA, and the effects on cell proliferation were examined. The effects on cell cycle regulators were analyzed by Western blotting and RT-PCR; transient transfection assays were used to analyze promoter regulation.p48 Inhibited proliferation of acinar and nonacinar cells by inducing a delay in G1-S progression through the up-regulation of p21 CIP1/WAF1 and p27 KIP1 and the down-regulation of cyclin D2. A 2-fold increase in p21 CIP1/WAF1 mRNA and in the activity of the p21 CIP1/WAF1 promoter was observed. The growth inhibition action of p48 was not associated with exocrine differentiation or with apoptosis. The antiproliferative effects were dependent on the COOH-terminal region of p48 and did not require the bHLH domain. Loss of p48 expression occurring during acinar-to-ductal transitions, characteristic of chronic pancreatitis, was associated with an increase of cell proliferation in ductal complexes.The results indicate that p48 couples cell proliferation and cell differentiation in the exocrine pancreas, thus contributing to tissue homeostasis. These effects may play a role in the increased risk for pancreatic cancer associated with chronic pancreatitis." @default.
• W2147889295 created "2016-06-24" @default.
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• W2147889295 date "2004-09-01" @default.
• W2147889295 modified "2023-10-03" @default.
• W2147889295 title "PTF1α/p48 and cell proliferation" @default.
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• W2147889295 doi "https://doi.org/10.1053/j.gastro.2004.06.058" @default.
• W2147889295 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15362048" @default.
• W2147889295 hasPublicationYear "2004" @default.
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