Aquaporin 1 Facilitated Hepatocellular Carcinoma SMMC7221 Cell Migration Associated with Water Perme

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The authors investigated the regulation of human aquaporin 1(hAQP1)and the involvement of aquaporin1(AQP1)in the migration of human hepatocellular carcinoma SMMC-7221 cells using RNA intereference technology.Firstly,two short hairpin RNA(shRNA)constructs in PBSU6 vector were reconstructed and their knockdown effects were identified in SMMC-7221 cells.Next,the involvement of endogenous hAQP1 in regulating the migration of SMMC-7221 cells was investigated via siRNA technology.HAQP1-shRNA can specifically inhibit AQP1 dependent osmotic water permeability.Meanwhile the migration of SMMC-7221 cells was inhibited remarkably after silencing AQP1 by performing transwell cell migration assay and in vitro wound healing assay.Furthermore,in the presence of an inhibitor HgCl2,the water permeability of the cell membrane was remarkably decreased,the expression of AQP1was upregulated after HgCl2 treatment and the cell movement was decreased at the moment.Increased AQP1 cannot attenuate cell migration ability when cell membrane loses its water permeability function.This demonstrates that the cell migration was remarkably related to the transporting water function of cell membrane.
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