TY - JOUR
T1 - Estrogen regulates expression of the jun family of protooncogenes in the uterus
AU - Chiappetta, Constance
AU - Kirkland, John L.
AU - Loose-Mitchell, David S.
AU - Murthy, Lata
AU - Stancel, George M.
N1 - Funding Information:
Grants HD-08615 and DX-38965 and a grant from the John P. McGovern Foundation.
PY - 1992/2
Y1 - 1992/2
N2 - Treatment of immature female rats with estradiol increases uterine levels of c-jun and jun-B mRNAs approx. 10-fold. This effect is specific for estrogenic steroids. The induction of jun transcripts is blocked by actinomycin D but not puromycin, suggesting that the hormonal effect is due at least in part to transcriptional activation. The hormone effect is rapid and peak levels of jun mRNAs are seen within 3 h after treatment. Inductions of jun and fos transcripts in the uterus by estradiol exhibit similar dose response curves (maximum responses at 4 μg/kg). Estradiol also elevates uterine levels of jun-D, and this induction is insensitive to puromycin. In vivo treatment with the phorbol ester TPA rapidly elevates uterine levels of fos, jun, and myc transcripts, indicating that expression of these photooncogenes is under non-estrogenic as well as estrogenic regulation in this target tissue. These results suggest that multiple members of the jun and fos protooncogene families may play a role in amplifying the uterine response to estrogens.
AB - Treatment of immature female rats with estradiol increases uterine levels of c-jun and jun-B mRNAs approx. 10-fold. This effect is specific for estrogenic steroids. The induction of jun transcripts is blocked by actinomycin D but not puromycin, suggesting that the hormonal effect is due at least in part to transcriptional activation. The hormone effect is rapid and peak levels of jun mRNAs are seen within 3 h after treatment. Inductions of jun and fos transcripts in the uterus by estradiol exhibit similar dose response curves (maximum responses at 4 μg/kg). Estradiol also elevates uterine levels of jun-D, and this induction is insensitive to puromycin. In vivo treatment with the phorbol ester TPA rapidly elevates uterine levels of fos, jun, and myc transcripts, indicating that expression of these photooncogenes is under non-estrogenic as well as estrogenic regulation in this target tissue. These results suggest that multiple members of the jun and fos protooncogene families may play a role in amplifying the uterine response to estrogens.
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U2 - 10.1016/0960-0760(92)90037-J
DO - 10.1016/0960-0760(92)90037-J
M3 - Article
C2 - 1543678
AN - SCOPUS:0026529372
SN - 0960-0760
VL - 41
SP - 113
EP - 123
JO - Journal of Steroid Biochemistry and Molecular Biology
JF - Journal of Steroid Biochemistry and Molecular Biology
IS - 2
ER -