| First Author | Yamaguchi M | Year | 1998 |
| Journal | Biochem Biophys Res Commun | Volume | 252 |
| Issue | 2 | Pages | 363-7 |
| PubMed ID | 9826535 | Mgi Jnum | J:51074 |
| Mgi Id | MGI:1314560 | Doi | 10.1006/bbrc.1998.9636 |
| Citation | Yamaguchi M, et al. (1998) Mouse placental cells secrete soluble leptin receptor (sOB-R): cAMP inhibits sOB-R production. Biochem Biophys Res Commun 252(2):363-7 |
| abstractText | The aims of this study were to identify whether mouse placenta secretes soluble OB-R (sOB-R) and to find the regulating factor of OB-R expression. Total RNAs were extracted from placenta and decidua, and OB- R expression was assessed by Northern blot analysis. Decidua did not express OB-R mRNA. However, OB-R mRNA expression was detectable in the placenta on day 13 of pregnancy, and then it increased and reached a peak on day 17 of pregnancy. Mouse placental cells from day 12 of pregnancy were cultured and OB-R gene expression was assessed by Northern blot analysis. OB-R mRNA expression was detectable from the second day of culture and reached a peak on the third day of culture. To determine whether placental cells release sOB-R, supernatant of cultured placental cells was subjected to Western blot analysis. sOB-R was detected in the medium by the second day of culture and sOB-R release increased up to the fourth day of culture. Addition of leptin to the medium did not affect expression of OB-R mRNA. However, 8-bromo cAMP inhibited both steady-state levels of OB-R mRNA and the amount of sOB-R protein in the medium in a dose- and time-dependent manner. These results suggest that trophoblast cells differentiate, express, and release sOB-R both in vivo and in vitro and that cAMP is one of several potent regulators of sOB-R secretion by the mouse placenta. Copyright 1998 Academic Press. |
