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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 peroxisomeproliferator- 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-γactivity 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.
Keywords: Adipocyte, bone regeneration, marrow mesenchymal stroma/stem cells, osteoblast, osteoclast, PPAR-γ.
Current Stem Cell Research & Therapy
Title:Molecular Mechanisms of PPAR-γ Governing MSC Osteogenic and Adipogenic Differentiation
Volume: 11 Issue: 3
Author(s): Haoliang Zhuang, Xu Zhang, Chuntie Zhu, Xiaoshan Tang, Fang Yu, Guang wei Shang and Xiaoxiao Cai
Affiliation:
Keywords: Adipocyte, bone regeneration, marrow mesenchymal stroma/stem cells, osteoblast, osteoclast, PPAR-γ.
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 peroxisomeproliferator- 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-γactivity 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.
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Cite this article as:
Zhuang Haoliang, Zhang Xu, Zhu Chuntie, Tang Xiaoshan, Yu Fang, Shang wei Guang and Cai Xiaoxiao, Molecular Mechanisms of PPAR-γ Governing MSC Osteogenic and Adipogenic Differentiation, Current Stem Cell Research & Therapy 2016; 11 (3) . https://dx.doi.org/10.2174/1574888X10666150531173309
DOI https://dx.doi.org/10.2174/1574888X10666150531173309 |
Print ISSN 1574-888X |
Publisher Name Bentham Science Publisher |
Online ISSN 2212-3946 |
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