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. 2017 Sep 10:403:305-317.
doi: 10.1016/j.canlet.2017.06.027. Epub 2017 Jul 4.

Circular RNA MYLK as a competing endogenous RNA promotes bladder cancer progression through modulating VEGFA/VEGFR2 signaling pathway

Zhenyu Zhong  1 , Mengge Huang  2 , Mengxin Lv  3 , Yunfeng He  4 , Changzhu Duan  3 , Luyu Zhang  5 , Junxia Chen  6
Affiliations

Circular RNA MYLK as a competing endogenous RNA promotes bladder cancer progression through modulating VEGFA/VEGFR2 signaling pathway

Zhenyu Zhong et al. Cancer Lett. .

Erratum in

Abstract

Accumulating evidences indicate that circular RNAs (circRNAs) play a vital role in modulating gene expression. However, the mechanisms underlying circRNAs remain largely elusive. Here, we screened circRNA and mRNA expression profiles of bladder carcinoma (BC) using microarray analysis VSports手机版. We found that circRNA-MYLK and VEGFA were significantly up-regulated and co-expressed in BC. Importantly, circRNA-MYLK levels were related to the progression of stage and grade of BC. Mechanistically, we demonstrated that circRNA-MYLK could directly bind to miR-29a and relieve suppression for target VEGFA, which activated VEGFA/VEGFR2 signaling pathway. Functionally, we found that ectopically expressing circRNA-MYLK accelerated cell proliferation, migration, tube formation of HUVEC and rearranged cytoskeleton. Moreover, up-regulating circRNA-MYLK promoted epithelial-mesenchymal transition (EMT). Whereas circRNA-MYLK knockdown decreased cell proliferation, motility, and induced apoptosis. Finally, up-regulating circRNA-MYLK promoted the growth, angiogenesis and metastasis of BC xenografts. Taken together, this study demonstrated for the first time that circRNA-MYLK might function as competing endogenous RNA (ceRNA) for miR-29a, which could contribute to EMT and the development of BC through activating VEGFA/VEGFR2 and downstream Ras/ERK signaling pathway. Our data suggest that circRNA-MYLK would be a promising target for BC diagnosis and therapy. .

Keywords: Bladder cancer; VEGFA/VEGFR2 signaling pathway; ceRNA; circRNA-MYLK; miR-29a V体育安卓版. .

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