Research Article

Golgin Subfamily A Member 5 Is Essential for Production of Extracellular Matrix Proteins during TGF-β1-Induced Periodontal Ligament-Fibroblastic Differentiation

Figure 5

GOLGA5/LG11 is involved in synthesis of ECM proteins. (a) Inhibition of TGF-β1-induced fibroblastic differentiation by SB431542 treatment caused Golgi fragmentation. The structures of Golgi apparatus detected by Cy3-labeled GM130. Golgi marked with arrowheads in (A) are enlarged and shown in (B). (b) Synthesis of ECM proteins such as collagen type 1 and fibronectin in PDL-fibroblastic progenitors was significantly blocked by decrease in GOLGA5 amount, as well as GOLGA5/LG11, collagen type 1α1, collagen type 1α2, and fibronectin in fibroblastic cells were completely decreased by GOLGA5 depletion by siRNA (A) and SB431542 treatment (B). (C) Immunocytochemistry of endogenous collagen type 1. Expression of collagen type 1 in cells was detected by Cy3 signals. Nuclei were detected by DAPI staining.
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