Constitutive Androstane Receptor Expression in the Rat Cervix During Gestation

Reproductive Sciences - Tập 7 - Trang 355-357 - 2000
Daniel F. Rychlik1, Eric Bieber1, Mark Phillippe1
1Department of Obstetrics and Gynecology (MC 2050), University of Chicago, Chicago, USA

Tóm tắt

To investigate expression of the constitutive androstane receptor (CAR) in the pregnant rat cervix. Rat uterine tissue was obtained on gestational days 12, 16, 20, 21, and 22 (the day of parturition), and postpartum day 1. In addition, liver, lung, kidney, heart, and skeletal muscle tissue were obtained. Expression of the two known CAR isoforms was evaluated using reverse transcriptase-polymerase chain reaction. These studies confirmed CAR expression in the liver; however, CAR was not demonstrated in the myometrium or cervical tissue. The currently described CAR1 and CAR2 isoforms are not expressed in rat uterine tissue; therefore, they do not appear to participate in parturition in the pregnant rat.

Tài liệu tham khảo

Russell DW, Wilson JD. Steroid 5α-reductase: Two genes/two enzymes. Annu Rev Biochem 1994;63:25–61. Mahendroo MS, Gala KM, Russell DW. 5 alpha-reduced androgens play a key role in murine parturition. Mol Endocrinol 1996; 10:380–92. Mahendroo MS, Porter A, Russel DW, Word RA. The parturition defect in steroid 5α-reductase type 1 knockout mice is due to impaired cervical ripening. Mol Endocrinol 1999; 13:981–92. Forman BM, Tzameli I, Ghoi HS. et al. Androstane metabolites bind to and deactivate the nuclear receptor GAR-β. Nature 1998;395:612–5. Choi HS, Ghung M. Tzameli I, et al. Differential transactivation by two isoforms of the orphan nuclear hormone receptor CAR. J Biol Chem 1997;272:23565–71. Baes M, Gulick T. Ghoi HS, Martinoh MG. Simha D. Moore DD. A new orphan member of the nuclear hormone receptor superfamily that interacts with a subset of retinoic acid response elements. Mol Cell Biol 1994;14:1544–52.