Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/68174
標題: Differential role of actin-binding proteins in controlling the adipogenic differentiation of human CD105-positive Wharton's Jelly cells
作者: Peng, K.W.
Liou, Y.M.
關鍵字: WJCs
ABPs
Small interfering RNAs
Overexpression
Atomic force
microscopy
human umbilical-cord
mesenchymal stem-cells
regulatory protein
f-actin
tropomyosin
adipocytes
gelsolin
cytoskeleton
caldesmon
formin-2
期刊/報告no:: Biochimica Et Biophysica Acta-General Subjects, Volume 1820, Issue 4, Page(s) 469-481.
摘要: Background: Wharton's Jelly cells (WJCs) can be differentiated into adipocytes by cytoskeletal reorganisation in association with changes in the mechanical properties of cells. Methods: WJCs subjected to adipocyte induction were observed changes in the cell morphology and alterations in actin filament formation. Transfection with either small interfering RNAs (siRNAs) against formin-2 (FMN-2), tropomyosin-1 (Tm-1), caldesmon (CaD), and profilin (Pro) or a pcDNA6-gelsolin (GSN)-constructed vector in WJCs was used to establish their regulatory roles in controlling adipogenesis. Phenotypic transformation of the cell shape and changes in cell surface adhesion force were determined in WJCs after transformation. Results: The levels of protein and mRNA expression of beta-actin and several key actin binding ptoteins (ABPs) were decreased during the early stage of adipogenic induction but were recovered in the later induction. The siFMN-2, siTm-1, siCaD, and siPro gene knockdown in WJCs caused a widening of the cell shape, while WJCs overexpressing GSN retained a fibroblast cell shape. For both transformations, atomic force microscopy revealed alterations in the biomechanical signals on the cell surface. However, the adipogenic potency was increased after siFMN-2, siTm-1, siCaD, and siPro gene knockdown and decreased during GSN overexpression. Conclusions: siRNA gene knockdown of siFMN-2, siTm-1, siCaD, and siPro enhances the potency for WJCs commitment to adipocyte, while GSN overexpression modulates the PPAR-gamma-independent pathway for the adipogenesis of WJCs. General significance: The phenotypic changes associated with decreased ABP gene expression are critical for regulating the adipogenic differentiation of WJCs through the temporal control of actin filament organisation. (C) 2012 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/68174
ISSN: 0304-4165
文章連結: http://dx.doi.org/10.1016/j.bbagen.2012.01.014
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