Activin A inhibits vascular endothelial cell growth and suppresses tumour angiogenesis in gastric cancer.
Activin A inhibits vascular endothelial cell growth and suppresses tumour angiogenesis in gastric cancer.
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DOI:
10.1038/bjc.2011.348
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发表时间:
2011-10-11
影响因子:
8.8
通讯作者:
Nishio, K.
中科院分区:
文献类型:
--
作者:
Kaneda, H.;Arao, T.;Matsumoto, K.;De Velasco, M. A.;Tamura, D.;Aomatsu, K.;Kudo, K.;Sakai, K.;Nagai, T.;Fujita, Y.;Tanaka, K.;Yanagihara, K.;Yamada, Y.;Okamoto, I.;Nakagawa, K.;Nishio, K.
Activin A is a multi-functional cytokine belonging to the transforming growth factor-β (TGF-β) superfamily; however, the effect of activin A on angiogenesis remains largely unclear. We found that inhibin β A subunit (INHBA) mRNA is overexpressed in gastric cancer (GC) specimens and investigated the effect of activin A, a homodimer of INHBA, on angiogenesis in GC. Anti-angiogenic effects of activin A via p21 induction were evaluated using human umbilical vein endothelial cells (HUVECs) in vitro and a stable INHBA-introduced GC cell line in vivo. Compared with TGF-β, activin A potently inhibited the cellular proliferation and tube formation of HUVECs with induction of p21. A promoter assay and a chromatin immunoprecipitation assay revealed that activin A directly regulates p21 transcriptional activity through Smads. Stable p21-knockdown significantly enhanced the cellular proliferation of HUVECs. Notably, stable p21-knockdown exhibited a resistance to activin-mediated growth inhibition in HUVECs, indicating that p21 induction has a key role on activin A-mediated growth inhibition in vascular endothelial cells. Finally, a stable INHBA-introduced GC cell line exhibited a decrease in tumour growth and angiogenesis in vivo. Our findings highlight the suppressive role of activin A, unlike TGF-β, on tumour growth and angiogenesis in GC.
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