A decline in Wnt3a signaling is necessary for mesenchymal stem cells to proceed to replicative senescence.

ABSTRACT: Umbilical cord blood-derived mesenchymal stem cells are a promising source of cells for regeneration therapy due to their multipotency, high proliferative capacity, relatively noninvasive collection, and ready availability. However, extended cell culture inevitably triggers cellular senescence-the irreversible arrest of cell division-thereby limiting the proliferative lifespan of adult stem cells. Wnt/β-catenin signaling plays a functional role as a key regulator of self-renewal and differentiation in mesenchymal stem cells (MSCs), and thus Wnt/β-catenin signaling and cellular senescence might be closely connected. Here, we show that the expression levels of canonical Wnt families decrease as MSCs age during subculture. Activation of the Wnt pathway by treatment with Wnt3a-conditioned medi

SUBMITTER: Jeoung JY 

PROVIDER: S-EPMC4389919 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature