Molecular Human Reproduction, Vol. 7, No. 5, 475-481,
May 2001
© 2001 European Society of Human Reproduction and Embryology
Implantation and pregnancy |
Effects of platelet-activating factor on cytokine production by human uterine cervical fibroblasts
Department of Obstetrics and Gynecology, Oita Medical University, 1-1 Idaigaoka, Hasama, Oita 879-5593, Japan
Abstract
Platelet-activating factor (PAF), a lipid that acts as a potent proinflammatory mediator, is involved in several reproductive processes including parturition. To investigate the effects of PAF on expression of various cytokines by cultured human uterine cervical fibroblasts obtained at term prior to labour, Northern blot analyses and enzyme-linked immunosorbent assays were performed. C-PAF, a stable analogue of PAF, increased expression of interleukin-6 and -8 mRNA in a dose-dependent manner (10-10 to 10–8 mol/l of C-PAF), and the expression peaked within 4 h. The corresponding protein concentrations were increased in culture media. Monocyte chemoattractant protein-1 mRNA showed marked induction by 10–8 mol/l of C-PAF; this peaked by 4 h and was followed by an increase in the protein concentration. Another cytokine, RANTES (regulated upon activation, normal T cell expressed and secreted) showed marked mRNA induction by 10–8 mol/l of C-PAF, and continued to increase in a time-dependent manner until 24 h. The protein concentration was correspondingly increased in the medium. The PAF-induced cytokine production was abolished by co-incubation with WEB 2170, a specific PAF receptor antagonist. PAF may stimulate local production of cytokines which may induce migration of leukocytes and accelerate collagenolysis in the uterine cervix, thus contributing to cervical ripening during parturition.
cervix/cytokines/fibroblasts/platelet-activating factor/platelet-activating factor receptor
Notes
1 Current address: Department of Obstetrics and Gynecology, Oita National Hospital, 2-11-45 Yokota, Oita-city, Oita 870-0263, Japan
2 To whom correspondence should be addressed. E-mail: sugano{at}oita-med.ac.jp
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