Title : Progesterone receptor (PR) isoforms PRA and PRB differentially regulate expression of the breast cancer resistance protein in human placental choriocarcinoma BeWo cells.

Pub. Date : 2008 Mar

PMID : 18042733






6 Functional Relationships(s)
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Protein Name
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1 Consistently, transcriptional activity of the BCRP promoter was induced 2- to 6-fold by 10(-8) to 10(-5) M progesterone in PRB-transfected cells. Progesterone RB transcriptional corepressor 1 Homo sapiens
2 Progesterone had little effect on BCRP expression and activity and transcriptional activity of the BCRP promoter in PRA-transfected cells; however, cotransfection of PRA and PRB significantly decreased the progesterone-response compared with that in cells transfected with only PRB. Progesterone RB transcriptional corepressor 1 Homo sapiens
3 Mutations in a novel progesterone response element (PRE) identified between -243 to -115 bp of the BCRP promoter region significantly attenuated the progesterone-response in PRB-transfected cells, and deletion of the PRE nearly completely abrogated the progesterone effect. Progesterone RB transcriptional corepressor 1 Homo sapiens
4 Mutations in a novel progesterone response element (PRE) identified between -243 to -115 bp of the BCRP promoter region significantly attenuated the progesterone-response in PRB-transfected cells, and deletion of the PRE nearly completely abrogated the progesterone effect. Progesterone RB transcriptional corepressor 1 Homo sapiens
5 Mutations in a novel progesterone response element (PRE) identified between -243 to -115 bp of the BCRP promoter region significantly attenuated the progesterone-response in PRB-transfected cells, and deletion of the PRE nearly completely abrogated the progesterone effect. Progesterone RB transcriptional corepressor 1 Homo sapiens
6 Collectively, progesterone induces BCRP expression in BeWo cells via PRB but not PRA. Progesterone RB transcriptional corepressor 1 Homo sapiens