Journal of Oral Science Research ›› 2018, Vol. 34 ›› Issue (2): 152-156.DOI: 10.13701/j.cnki.kqyxyj.2018.02.011

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Effect of Calpain 1 Gene Silencing by RNA Interference on Proliferation and Migration of Oral Squamous Cell Carcinoma Cell Lines HSC3

ZHANG Hou-hua1*, FAN Hua-li2   

  1. 1. Department of Stomatology, Jingzhou Hospital of Traditional Chinese Medicine, Jingzhou 434000, China;
    2. Changsha Stomatological Hospital, Changsha 410000, China.
  • Received:2017-10-09 Online:2018-02-28 Published:2018-02-26

Abstract: Objective: To explore the silencing effect of calpain 1 by RNA interference on cell proliferation and migration in oral squamous cell carcinoma cell line HSC3. Methods: siRNA expression vector (siRNA-calpain 1) against the calpain 1 gene was transiently transfected into HSC3. The proliferation was tested by MTT method. The cell cycle and apoptosis was detected by flow cytometry. The cell migration and invasion were assessed by Transwell assay. The expression of TGF-β RII, Vimentin, Smad2, Smad3, phosphorylated Smad2/3, E-cadherin, N-cadherin, MMP-2, and MMP-9 protein were detected by western blot. Results: The expression of calpain 1 in HSC3 cell lines was significantly higher than those in NOKSI cell lines (P<0.05). Compared with the blank group and the si-NC group, the expression of calpain 1 was significantly decreased (P<0.05). Compared with si-NC group, the viability of si-calpain group was significantly decreased after 48 h, 76 h and 96 h after transfection with si-calpain1 (P<0.05). The proportion of G0/G1 phase cells in si-calpain group was significantly increased, while the proportion of S phase cells was significantly decreased (P<0.05). The expression of E-cadherin in si-calpain group was significantly increased, while cyclin-D1, cyclin-E, Vimentin, N-cadherin, MMP-2, MMP-9, TGF-β RII, Smad2, Smad3, p-Smad2/3 protein expression were significantly decreased (P<0.05). Conclusion: siRNA silencing calpain 1 gene can inhibit cell proliferation by inhibiting cell cycle G0/G1, and inhibit cell migration and invasion by inhibiting MMPs and EMT. This process involves TGF-β/Smad signaling pathway.

Key words: Oral squamous cell carcinoma, Calpain 1, Cell line HSC3, Cell proliferation, Cell migration

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