A+U-rich-element RNA-binding factor 1/heterogeneous nuclear ribonucleoprotein D gene expression is regulated by oestrogen in the rat uterus.
Oestrogen-mediated gene expression is regulated at both the transcriptional and post-transcriptional levels. The molecular mechanism of transcriptional regulation has been well characterized. On the other hand, there is little understanding of the mechanism of post-transcriptional regulation. To clarify the mechanism of oestrogen-mediated post-transcriptional regulation, we focused on A+U-rich-element RNA-binding factor 1/heterogeneous nuclear ribonucleoprotein D (AUF1/hnRNP D), which is known as a regulator of cytosolic mRNA degradation and nuclear pre-mRNA maturation. However, little is known about the expression levels and the regulation of AUF1/hnRNP D mRNA in tissues. We further investigated the expression levels of AUF1/hnRNP D isoform mRNAs to determine whether AUF1/hnRNP D gene expression is regulated by oestrogen in the ovariectomized adult female rat uterus. Uterine AUF1/hnRNP D mRNA was induced by a single subcutaneous injection (1 microg/kg) of 17beta-oestradiol (E2), reaching a peak level within 6 h. Furthermore, we observed that the E2-induced AUF1/hnRNP D isoform mRNAs are p45 and p40 transcripts, and that E2-mediated induction is suppressed by the oestrogen receptor antagonist ICI 182,780. Finally, using the transcriptional inhibitor actinomycin D, we confirmed that the E2-mediated increase in AUF1/hnRNP D mRNA is caused by E2-dependent AUF1/hnRNP D mRNA stabilization.
Arao
Yukitomo
Y
Department of Health Science, Jichi Medical School, 3311-1 Yakushiji, Minamikawachi-machi, Tochigi 329-0498, Japan. ya@jichi.ac.jp
Kikuchi
Atsumi
A
Ikeda
Kazuhiro
K
Nomoto
Satoshi
S
Horiguchi
Hyogo
H
Kayama
Fujio
F
D000818:Animals; D004958:Estradiol / Q000031:analogs & derivatives* / Q000494:pharmacology*; D004965:Estrogen Antagonists / Q000494:pharmacology; D005260:Female; D000077267:Fulvestrant; D005786:Gene Expression Regulation / Q000187:drug effects; D000081035:Heterogeneous Nuclear Ribonucleoprotein D0; D034502:Heterogeneous-Nuclear Ribonucleoprotein D; D034441:Heterogeneous-Nuclear Ribonucleoproteins; D010052:Ovariectomy; D020033:Protein Isoforms / Q000235:genetics; D020871:RNA Stability / Q000187:drug effects; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000235:genetics*; D051381:Rats; D012261:Ribonucleoproteins / Q000235:genetics*; D014599:Uterus / Q000187:drug effects* / Q000378:metabolism*
D004965:Estrogen Antagonists; D000081035:Heterogeneous Nuclear Ribonucleoprotein D0; D034502:Heterogeneous-Nuclear Ribonucleoprotein D; D034441:Heterogeneous-Nuclear Ribonucleoproteins; C000630988:Hnrnpd protein, rat; D020033:Protein Isoforms; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D012261:Ribonucleoproteins; D000077267:Fulvestrant; D004958:Estradiol