The effects of histone deacetylase inhibitors on the induction of differentiation in chondrosarcoma cells

Riku Sakimura, Kazuhiro Tanaka, Syunsaku Yamamoto, Tomoya Matsunobu, Xu Li, Masuo Hanada, Takamitsu Okada, Tomoyuki Nakamura, Yang Li, Yukihide Iwamoto

研究成果: ジャーナルへの寄稿学術誌査読

46 被引用数 (Scopus)


Purpose: Histologically, chondrosarcomas represent the degree of chondrogenic differentiation, which is associated with the prognosis of the disease. Histone acetylation and deacetylation play key roles in the regulation of chondrocytic differentiation. Here, we describe the antitumor effects of histone deacetylase (HDAC) inhibitors as differentiating reagents on chondrosarcomas. Experimental Design: We examined the effects of a HDAC inhibitor, depsipeptide, on the growth of chondrosarcoma cell lines. We also investigated the modulation of the expression levels of extracellular matrix genes and the induction of phenotypic change in chondrosarcoma cells treated with depsipeptide. Finally, we examined the antitumor effect of depsipeptide on chondrosarcoma in vivo. Results: Depsipeptide inhibited the growth of chondrosarcoma cells by inducing cell cycle arrest and/or apoptosis. HDAC inhibitors increased the expression of the α1 chain of type II collagen (COL2A1) gene due to the enhanced histone acetylation in the promoter and enhancer. Depsipeptide also up-regulated the expressions of aggrecan and the α2 chain of type XI collagen (COL11A2) mRNA in a dose-dependent manner. Moreover, long-term treatment with a low dose of depsipeptide resulted in the induction of differentiation into hypertrophic phenotype, as shown by the increment of the α1 chain of type X collagen (COL10A1) expression in chondrosarcoma cells. In vivo studies and histologic analyses confirmed that depsipeptide significantly inhibited tumor growth and induced differentiation into the hypertrophic and mineralized state in chondrosarcoma cells. Conclusions: These results strongly suggest that HDAC inhibitors may be promising reagents for use as a differentiating chemotherapy against chondrosarcomas.

ジャーナルClinical Cancer Research
出版ステータス出版済み - 1月 1 2007

!!!All Science Journal Classification (ASJC) codes

  • 腫瘍学
  • 癌研究


「The effects of histone deacetylase inhibitors on the induction of differentiation in chondrosarcoma cells」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。