Abstract
Interleukin-8 (IL-8) has an essential role in the mechanism of parturition. IL-8 induces its effect through specific cell binding receptors. The main purpose of this research was to elucidate the presence of IL-8 receptors in the gestational tissues and their relation to parturition. Fetal membranes, placenta, umbilical cord and myometrial samples were collected before the initiation of labor during elective Cesarean sections (n = 15). Similar biopsies (except myometrial samples) were also gathered after normal vaginal delivery (n = 15). Immunohistochemical staining for IL-8 receptors type I and II was carried out for the fresh frozen sections of all samples. Immunoreactive score (IRS) was calculated for the stained sections. IL-8 Receptors type I and II were recognized in the fetal membranes, placenta, umbilical cord and myometrial samples collected from patients before the initiation of labor. The staining of amnion and placentas were found to be more intensified in the samples collected after vaginal delivery compared to those from elective cesarean sections and before initiation of labor. Increased expression of IL-8 receptors after initiation of labor may indicate that IL-8 receptors might have a role during parturition.
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