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Progesterone and estradiol effects on SRC-1 and SRC-3 expression in human astrocytoma cell lines.

Abstract：

:Progesterone (P(4)) and estradiol (E(2)) regulate many cell functions through their interaction with specific intracellular receptors, which require the participation of coactivators such as SRC-1 and SRC-3 for enhancing their transcriptional activity. Coactivator expression is altered in many cancers and in some of them their expression is regulated by P(4) and E(2). In this study, we determined progesterone and estrogen receptor isoform expression in two human astrocytoma cell lines with different evolution grade (U373, grade III; and D54, grade IV) by Western Blot. We studied the role of P(4) and E(2) on SRC-1 and SRC-3 expression in U373 and D54 cell lines by RT-PCR and Western blot. In U373 cells, P(4) did not modify SRC-1 expression, but in D54 cells it increased SRC-1 mRNA expression after 12 h of treatment without significant changes after 24 h. P(4) also increased SRC-1 protein content after 24 h, but reduced it after 48 h. E(2) did not change SRC-1 expression in any cell line. SRC-3 expression was not regulated by either E(2) or P(4). Our data suggest that SRC-1 and SRC-3 expression is differentially regulated by sex steroid hormones in astrocytomas and that P(4) regulates SRC-1 expression depending on the evolution grade of human astrocytoma cells.

journal_name

Endocrine

journal_title

Endocrine

authors

Hernández-Hernández OT,Rodríguez-Dorantes M,González-Arenas A,Camacho-Arroyo I

doi

10.1007/s12020-009-9288-6

subject

Has Abstract

pub_date

2010-02-01 00:00:00

pages

194-200

issue

1

eissn

1355-008X

issn

1559-0100

journal_volume

37

pub_type

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