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[Analysis different transcriptional factors in different phenotype endometrial cancer cells].

OBJECTIVE
To analysis the activity of transcriptional factors in endometrial cancer cell lines with different estrogen receptor subtypes.


METHODS
The mRNA levels of estrogen receptor (ER) was detected by quantitative RT-PCR, and the activity of transcriptional factors was also analysed by 345-channel protein/DNA array in RL-952 (the expression status of ERalpha and ERbeta both positive), HEC-1A [ERalpha (+/-), while ERbeta negative] and HEC-1B (ERalpha and ERbeta both negative). The transcription factors of NFkappaBp65 and p38MAPK with different activity were tested by enzyme-linked immunosorbent assay (ELISA) to confirm the results of protein/DNA array.


RESULTS
The mRNA levels of ERalpha in RL-952, HEC-1A and HEC-1B were (6780+/-282), (684+/-84) and (168+/-38) copy/ng, respectively. Among 345 candidate transcriptional factors, there were 28 factors associated with ER status. Compared with RL-952 cells, 13 transcriptional activity factors were concomitantly up-regulation, while 15 concomitantly down-regulation in HEC-1A and HEC-1B cells. Transcriptional activities of TTF (1)-1, NRF-1, TCE were significantly correlated with the high-expression status of ERalpha mRNA (r=0.523, P=0.037), while RFX123 and Ikaros were significantly correlated with the low-expression status of ERalpha mRNA (r=-0.312, P=0.041).


CONCLUSION
Transcriptional factors of TTF (1)-1, NRF-1, TCE may be associated with ER-mediated signal pathway, while RFX123 and Ikaros may be associated with non ER-mediated signal pathway in endometrial cancer.