PMID- 8788206 OWN - NLM STAT- MEDLINE DCOM- 19961022 LR - 20190512 IS - 0006-3363 (Print) IS - 0006-3363 (Linking) VI - 54 IP - 2 DP - 1996 Feb TI - Expression of monocyte chemoattractant protein-1 in the corpus luteum of the rat. PG - 513-20 AB - The known accumulation of macrophages in corpora lutea (CL) at the time of luteal regression prompted us to investigate whether the chemoattractant protein monocyte chemoattractant protein-1 (MCP-1) is expressed in the rat CL. On the day of confirmed mating (Day 0 of pregnancy), regressing CL from the previous (nonfertile) estrous cycle contained immunodetectable MCP-1 and numerous monocytes/macrophages, whereas the newly formed CL of pregnancy, within the same ovary, contained little MCP-1 and few monocytes/macrophages. MCP-1 diminished in the regressing CL on Days 3 and 9 of pregnancy, although numerous monocytes/macrophages remained. The CL of pregnancy on Days 3 and 9 of pregnancy contained minimal MCP-1 and relatively few monocytes/macrophages. By Days 17 and 21 of pregnancy, however, prior to parturition and prior to an accumulation of monocytes/macrophages, expression of MCP-1 increased in the CL of pregnancy. Northern blots revealed a resurgence of luteal MCP-1 mRNA on Day 21 of pregnancy: 3805 +/- 1077 on Day 21 vs. 1059 +/- 177 on Day 9 (p < 0.05; expressed as densitometric units relative to beta-actin). In conclusion, the expression of MCP-1 in the rat CL in association with, or preceding, the appearance of monocytes/macrophages at the time of luteal regression is consistent with the known role of MCP-1 as a potent chemoattractant for monocytes/macrophages. This suggests that MCP-1 might have a prominent role in the immunological process of luteal regression. FAU - Townson, D H AU - Townson DH AD - Department of Physiology, University of Michigan Medical School, Ann Arbor 48109-0622, USA. townson@umich.edu FAU - Warren, J S AU - Warren JS FAU - Flory, C M AU - Flory CM FAU - Naftalin, D M AU - Naftalin DM FAU - Keyes, P L AU - Keyes PL LA - eng GR - P30 HD18258/HD/NICHD NIH HHS/United States GR - T32-HD07048/HD/NICHD NIH HHS/United States GR - U54 HD29184/HD/NICHD NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Biol Reprod JT - Biology of reproduction JID - 0207224 RN - 0 (Chemokine CCL2) RN - 0 (RNA, Messenger) SB - IM MH - Animals MH - Base Sequence MH - Blotting, Northern MH - Chemokine CCL2/analysis/*genetics MH - Corpus Luteum/chemistry/cytology/*metabolism MH - Female MH - *Gene Expression MH - Immunohistochemistry MH - Luteolysis MH - Macrophages MH - Molecular Sequence Data MH - Monocytes MH - Pregnancy MH - RNA, Messenger/metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Time Factors EDAT- 1996/02/01 00:00 MHDA- 1996/02/01 00:01 CRDT- 1996/02/01 00:00 PHST- 1996/02/01 00:00 [pubmed] PHST- 1996/02/01 00:01 [medline] PHST- 1996/02/01 00:00 [entrez] AID - 10.1095/biolreprod54.2.513 [doi] PST - ppublish SO - Biol Reprod. 1996 Feb;54(2):513-20. doi: 10.1095/biolreprod54.2.513.