| First Author | Mizoguchi Y | Year | 1997 |
| Journal | Mol Cell Endocrinol | Volume | 132 |
| Issue | 1-2 | Pages | 177-83 |
| PubMed ID | 9324059 | Mgi Jnum | J:42778 |
| Mgi Id | MGI:1096264 | Doi | 10.1016/s0303-7207(97)00134-2 |
| Citation | Mizoguchi Y, et al. (1997) Corticosterone is required for the prolactin receptor gene expression in the late pregnant mouse mammary gland. Mol Cell Endocrinol 132(1-2):177-83 |
| abstractText | In order to clarify the prolactin receptor (PRL-R) gene expression at lactogenesis, the levels of the long and short forms of PRL-R mRNA were determined by the competitive RT-PCR in the pregnant, lactating and ovariectomized midpregnant mouse mammary gland. Plasma concentrations of corticosterone and progesterone were determined by RIA. The long form of PRL-R mRNA level was low until 10:00 on day 18, increased 3.3-fold at 22:00 on day 18 of pregnancy and further increased to 4.6-fold at 10:00 on day 0 of lactation. The short form of PRL-R mRNA level remained unchanged during this time period. The corticosterone:progesterone ratio increased 15.5-fold during the last 1.5 days of pregnancy. Corticosterone increased the long form of PRL-R mRNA level when the tissues on day 17 were cultured. On day 12 of pregnancy and following ovariectomy, corticosterone was exceedingly high from 2 h to 8 h and the corticosterone:progesterone ratio changed prior to the increase in the long form of PRL-R mRNA level. We conclude that corticosterone increases the PRL-R gene expression in the mammary gland before the onset of parturition. |
