Molecular Mechanisms of PPAR-γ Governing MSC Osteogenic and Adipogenic Differentiation.

Abstract:

:Sharing the same precursor cell lineage located in the bone marrow, mesenchymal stroma/stem cells (MSCs), osteoblasts and adipocytes have a reciprocal relationship in differentiation and function. The nuclear transcription factor peroxisome-proliferator- activated receptor-gamma (PPAR-γ) has been found expressed in both osteoblasts and adipocytes, as well as in MSCs, suggesting its crucial role in regulating adipocyte formation and osteoblast development. It has been observed in animal models that upregulated PPAR-γ activity results in bone loss where marrow adiposity is facilitated, while downregulated PPAR-γ activity leads to bone mass elevation. Evidence suggests that the dual function of PPAR-γ in either anti-osteoblastic or pro-adipocytic aspects is determined by its ligand. Furthermore, various cytokines and extracellular signaling pathways are involved in the transactivation of PPAR-γ, which can trigger the adipogenesis/osteoblastogenesis switch. PPAR-γ, therefore, shows tremendous potential in novel strategies for bone tissue engineering and clinical application. This review summarizes the regulatory function of PPAR-γ in MSC differentiation, as well as the cytokine and extracellular signaling pathways participating in the cross-talk between adipogenesis and osteoblastogenesis.

authors

Zhuang H,Zhang X,Zhu C,Tang X,Yu F,Shang GW,Cai X

doi

10.2174/1574888x10666150531173309

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

255-64

issue

3

eissn

1574-888X

issn

2212-3946

pii

CSCRT-EPUB-67800

journal_volume

11

pub_type

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