Xu BL, Zhao QZ, Gao XY, Hou GJ. Effect of estradiol and bisphenol A on human hepatoblastoma cell viability and telomerase activity.
ACTA ACUST UNITED AC 2015;
48:1004-9. [PMID:
26397976 PMCID:
PMC4671527 DOI:
10.1590/1414-431x20154400]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 04/28/2015] [Indexed: 12/05/2022]
Abstract
Sex hormones from environmental and physiological sources might play a major role in
the pathogenesis of hepatoblastoma in children. This study investigated the effects
of estradiol and bisphenol A on the proliferation and telomerase activity of human
hepatoblastoma HepG2 cells. The cells were divided into 6 treatment groups: control,
bisphenol A, estradiol, anti-estrogen ICI 182,780 (hereinafter ICI), bisphenol A+ICI,
and estradiol+ICI. Cell proliferation was measured based on average absorbance using
the Cell Counting-8 assay. The cell cycle distribution and apoptotic index were
determined by flow cytometry. Telomerase activity was detected by polymerase chain
reaction and a telomeric repeat amplification protocol assay. A higher cell density
was observed in bisphenol A (P<0.01) and estradiol (P<0.05) groups compared
with the control group. Cell numbers in S and G2/M phases after treatment for 48 h
were higher (P<0.05), while the apoptotic index was lower (P<0.05) and
telomerase activities at 48 and 72 h (P<0.05) were higher in these groups than in
the control group. The cell density was also higher in bisphenol A+ICI (P<0.01)
and estradiol+ICI (P<0.05) groups compared with the ICI group. Furthermore, cell
numbers were increased in S and G2/M phases (P<0.05), while the apoptotic index
was lower (P<0.05) and telomerase activities at 48 and 72 h were higher
(P<0.05) in these groups than in the ICI group. Therefore, bisphenol A and
estradiol promote HepG2 cell proliferation in vitro by inhibition of
apoptosis and stimulation of telomerase activity via an estrogen receptor-dependent
pathway.
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