The zinc finger transcription factor PW1/PEG3 restrains murine beta cell cycling

Mozhdeh Sojoodi, Leslie Stradiot, Karo Tanaka, Yves Heremans, Gunter Leuckx, Vanessa Besson, Willem Staels, Mark Van de Casteele, Giovanna Marazzi, David Sassoon, Henry Heimberg, Paola Bonfanti

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


AIMS/HYPOTHESIS: Pw1 or paternally-expressed gene 3 (Peg3) encodes a zinc finger transcription factor that is widely expressed during mouse embryonic development and later restricted to multiple somatic stem cell lineages in the adult. The aim of the present study was to define Pw1 expression in the embryonic and adult pancreas and investigate its role in the beta cell cycle in Pw1 wild-type and mutant mice.

METHODS: We analysed PW1 expression by immunohistochemistry in pancreas of nonpregant and pregnant mice and following injury by partial duct ligation. Its role in the beta cell cycle was studied in vivo using a novel conditional knockout mouse and in vitro by lentivirus-mediated gene knockdown.

RESULTS: We showed that PW1 is expressed in early pancreatic progenitors at E9.5 but becomes progressively restricted to fully differentiated beta cells as they become established after birth and withdraw from the cell cycle. Notably, PW1 expression declines when beta cells are induced to proliferate and loss of PW1 function activates the beta cell cycle.

CONCLUSIONS/INTERPRETATION: These results indicate that PW1 is a co-regulator of the beta cell cycle and can thus be considered a novel therapeutic target in diabetes.

Original languageEnglish
Pages (from-to)1474-1479
Number of pages6
Issue number7
Publication statusPublished - 29 Apr 2016


  • diabetes
  • beta cell
  • transcription factor
  • PW1/PEG3
  • cell cycle


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