Beta2-glycoprotein I cooperate with hepatitis B surface antigen promotes hepatocellular carcinogenesis via the nuclear factor kappa B signal pathway were enhanced by the lipopolysaccharide

Abstract

Aim: We aimed to elucidate whether beta2-glycoprotein I (β2GPI) cooperation with hepatitis B surface antigen (HBsAg) promoted hepatocellular carcinogenesis enhanced by the lipopolysaccharide (LPS) via activation of nuclear factor kappa B (NF-κB) and expression of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and alpha fetal protein (AFP) in liver cancer cells.

Methods: Liver cancer cells (SMMC-7721) were transiently transfected with β2GPI and/or HBsAg and were subjected to LPS treatment. TNF-α, IL-1β, and AFP expression were measured in all groups by ELISA. NF-κB activation was assessed by non-radioactive electrophoretic mobility shift assay (EMSA) and was quantified in all groups.

Results: Cells transfected with β2GPI and/or HBsAg induced activation of NF-κB, with the highest activation seen in the doubly β2GPI- and HBsAg-transfected cells treated with LPS. Non-transfected cells treated with LPS exhibited lower activation compared to either β2GPI- or HBsAg-transfected cells with LPS treatment. In addition, cells transfected with β2GPI and/or HBsAg induced significantly increased expression of TNF-α, IL-1β and AFP, with the highest levels again seen in the doubly β2GPI- and HBsAg-transfected cells treated with LPS.

Conclusion: These observations suggest that the activity of NF-κB induced by β2GPI and HBsAg was enhanced by LPS. Expression of TNF-α, IL-1β and AFP increased in β2GPI and HBsAg cotransfected liver cancer cells.

Keywords

Beta2-glycoproten I / hepatitis B surface antigen / lipopolysaccharide / liver cancer SMMC-7721 / nuclear factor kappa B

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