期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 357, 期 4, 页码 997-1003出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2007.04.035
关键词
Gas6; chondrogenesis; differentiation; C3H10T1/2 cell; MAPK
The mesenchymal cell line C3H10T1/2 can be preferentially induced toward chondrogenesis by culturing as a micromass in the presence of bone morphogenetic protein 2. To screen new regulator genes for chondrogenic differentiation, we performed differential display polymerase chain reaction and identified growth arrest-specific 6 (Gas6) as a gene that was clearly downregulated by this induction of chondrogenic differentiation. Blockage of Gas6 mRNA expression by siRNA remarkably enhanced the chondrogenic differentiation, while stimulation with recombinant Gas6 inhibited the mRNA expressions of type 11 collagen (Col2a1) and aggrecan. Gas6 signaling activated the phosphorylation of ERK1/2, SAPK/JNK, and Akt, but not p38 MAPK. These results suggest that Gas6 negatively regulates chondrogenic differentiation, at least through the MAPK pathway. (c) 2007 Elsevier Inc. All rights reserved.
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