Possible roles of thrombin-induced activation of protease-activated receptor 1 in human luteinized granulosa cells.
The presence of thrombin and its receptor, protease-activated receptor 1 (PAR 1), in the ovary suggests that thrombin may regulate ovarian function. In particular, to address the possible role of thrombin in ovulation, a phenomenon displaying mimicry of inflammation, we investigated the effects of thrombin and PAR 1 on the production of inflammation-related substances in human luteinized granulosa cells (LGC). Thrombin stimulated the production of IL-8 and monocyte chemoattractant protein-1 by cultured LGC. The stimulatory effects of thrombin were inhibited by both inhibitors of thrombin (hirudin and PPACK) and a protein kinase C inhibitor (calphostin C). The PAR 1 agonist, SFLLRN, also stimulated the production of IL-8 and monocyte chemoattractant protein-1. Thrombin and SFLLRN stimulated the geletinase activities of LGC, the effect of both being inhibited by hirudin and PPACK. Immunocytochemical study showed that thrombin and SFLLRN induced translocation of nuclear factor kappaB to the nucleus from the cytoplasm in LGC. Expression of PAR 1 mRNA was detected in LGC by RT-PCR analysis. These findings suggest that thrombin plays physiological roles in ovulation by enhancing the production of chemoattractive and gelatinolytic substances by granulosa cells by a mechanism involving PAR 1.
Hirota
Yasushi
Y
Department of Obstetrics and Gynecology, University of Tokyo, Tokyo 113-8655, Japan.
Osuga
Yutaka
Y
Yoshino
Osamu
O
Koga
Kaori
K
Yano
Tetsu
T
Hirata
Tetsuya
T
Nose
Emi
E
Ayabe
Takuya
T
Namba
Akira
A
Tsutsumi
Osamu
O
Taketani
Yuji
Y
D000328:Adult; D001777:Blood Coagulation / Q000187:drug effects; D002478:Cells, Cultured; D018932:Chemokine CCL2 / Q000096:biosynthesis; D018925:Chemokines / Q000096:biosynthesis; D005260:Female; D005455:Fluorescent Antibody Technique; D018093:Gelatinases / Q000096:biosynthesis; D006107:Granulosa Cells / Q000187:drug effects / Q000378:metabolism*; D006801:Humans; D018836:Inflammation Mediators / Q000378:metabolism; D016209:Interleukin-8 / Q000096:biosynthesis; D014975:Lutein / Q000494:pharmacology*; D020782:Matrix Metalloproteinases / Q000096:biosynthesis; D016328:NF-kappa B / Q000096:biosynthesis / Q000235:genetics; D044463:Receptor, PAR-1; D018179:Receptors, Thrombin / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013917:Thrombin / Q000494:pharmacology*
D018932:Chemokine CCL2; D018925:Chemokines; D018836:Inflammation Mediators; D016209:Interleukin-8; D016328:NF-kappa B; D044463:Receptor, PAR-1; D018179:Receptors, Thrombin; D013917:Thrombin; D018093:Gelatinases; D020782:Matrix Metalloproteinases; D014975:Lutein