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Over-expression of PPAR-γ2 gene enhances the adipogenic differentiation of hemangioma-derived mesenchymal stem cells in vitro and in vivo .
Oncotarget 2017 December 30
Background: Most of infantile hemangiomas involute into fibrofatty tissue in childhood, which indicates adipogenesis during this period. Mesenchymal stem cells (MSCs) contribute to the adipogenesis in IH. In this study, we investigated the effects of overexpression of PPAR-γ2 gene on the adipogenic differentiation of Hemangioma-derived MSCs (Hem-MSCs), and discussed the possibility of targeted therapy via PPAR-γ pathway.
Methods: MSCs were isolated from proliferating hemangioma by their selective adhesion to plastic culture dishes. Recombinant lentivirus with PPAR-γ2 gene were prepared, and used to transfect Hem-MSCs. Transfected cells were cultured in adipogenic medium to observe the differentiation in vitro . And the cells were mixed with Matrigel, then subcutaneously injected into the back of nude mice to observe the differentiation in vivo .
Results: In the in vitro tests, Hem-MSCs with overexpression of PPAR-γ2 gene showed enhanced adipogenic differentiation with increased expression of adipogenic-related genes, including PPAR-γ2, ADD1, LPL, and CEBPA genes. In the in vivo tests, Hem-MSCs/Matrigel plugs with overexpression of PPAR-γ2 gene also showed accelerated adipogenesis and time-phased changes of above genes.
Conclusions: Overexpression of PPAR-γ2 gene enhances and accelerates the adipogenic differentiation of Hem-MSCs in vitro and in vivo . The results may provide the preliminary evidences for the targeted therapy of IH via PPAR-γ signal pathway.
Methods: MSCs were isolated from proliferating hemangioma by their selective adhesion to plastic culture dishes. Recombinant lentivirus with PPAR-γ2 gene were prepared, and used to transfect Hem-MSCs. Transfected cells were cultured in adipogenic medium to observe the differentiation in vitro . And the cells were mixed with Matrigel, then subcutaneously injected into the back of nude mice to observe the differentiation in vivo .
Results: In the in vitro tests, Hem-MSCs with overexpression of PPAR-γ2 gene showed enhanced adipogenic differentiation with increased expression of adipogenic-related genes, including PPAR-γ2, ADD1, LPL, and CEBPA genes. In the in vivo tests, Hem-MSCs/Matrigel plugs with overexpression of PPAR-γ2 gene also showed accelerated adipogenesis and time-phased changes of above genes.
Conclusions: Overexpression of PPAR-γ2 gene enhances and accelerates the adipogenic differentiation of Hem-MSCs in vitro and in vivo . The results may provide the preliminary evidences for the targeted therapy of IH via PPAR-γ signal pathway.
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