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Paracrine cellular senescence exacerbates biliary injury and impairs regeneration.

TitleParacrine cellular senescence exacerbates biliary injury and impairs regeneration.
Publication TypeJournal Article
Year of Publication2018
AuthorsFerreira-González S, Lu W-Y, Raven A, Dwyer B, Man TYung, O'Duibhir E, Lewis PJStarkey, Campana L, Kendall TJ, Bird TG, Tarrats N, Acosta J-C, Boulter L, Forbes SJ
JournalNat Commun
Date Published2018 Mar 09

Cellular senescence is a mechanism that provides an irreversible barrier to cell cycle progression to prevent undesired proliferation. However, under pathological circumstances, senescence can adversely affect organ function, viability and regeneration. We have developed a mouse model of biliary senescence, based on the conditional deletion of Mdm2 in bile ducts under the control of the Krt19 promoter, that exhibits features of biliary disease. Here we report that senescent cholangiocytes induce profound alterations in the cellular and signalling microenvironment, with recruitment of myofibroblasts and macrophages causing collagen deposition, TGFβ production and induction of senescence in surrounding cholangiocytes and hepatocytes. Finally, we study how inhibition of TGFβ-signalling disrupts the transmission of senescence and restores liver function. We identify cellular senescence as a detrimental mechanism in the development of biliary injury. Our results identify TGFβ as a potential therapeutic target to limit senescence-dependent aggravation in human cholangiopathies.

Alternate JournalNat Commun
PubMed ID29523787
PubMed Central IDPMC5844882
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