Substrate stiffness affects epithelial-mesenchymal transition of cervical cancer cells through miR-106b and its target protein DAB2.

Abstract:

:The effects of different substrate stiffness were investigated on epithelial-mesenchymal transition (EMT) of cervical cancer cell lines and the role of miR-106b and its target protein DAB2 therein. Cervical cancer cell lines HeLa and SiHa were cultured on artificial substrates with different stiffness prepared using different ratios of acrylamide and bis-acrylamide. Changes of microRNA profiles were detected using microRNA chip analysis, and the expression levels of EMT-related markers E-cadherin and vimentin were detected using western blotting and real-time PCR. In addition, the effects of miR-106b overexpression as well as miR-106b and DAB2 knockdown on expression of E-cadherin and vimentin were also examined using western blotting and real-time PCR. The results showed that i) cervical cancer cell lines SiHa and HeLa cultured on substrate with stiffness of 20 kPa had the strongest EMT ability, showed the highest levels of vimentin and lowest levels of E-cadherin, compared with cells cultured on substrate with stiffness of 1 kPa; ii) miR-106b knockdown reversed the effects of substrate stiffness on EMT of cervical cancer cells, while miR-106 overexpression and DAB2 knockdown induced EMT of cervical cancer cells cultured on substrate with stiffness of 20 kPa. Overall, the results indicated that substrate stiffness could regulate EMT of cervical cancer cell lines HeLa and SiHa at least partially through miR-106b and its downstream target DAB2.

journal_name

Int J Oncol

authors

Piao J,You K,Guo Y,Zhang Y,Li Z,Geng L

doi

10.3892/ijo.2017.3978

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

2033-2042

issue

6

eissn

1019-6439

issn

1791-2423

journal_volume

50

pub_type

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