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  • Title: Measurement of interleukin-1 alpha and interleukin-6 in pregnancy-associated tissues.
    Author: Gunn L, Hardiman P, Tharmaratnam S, Lowe D, Chard T.
    Journal: Reprod Fertil Dev; 1996; 8(7):1069-73. PubMed ID: 8916283.
    Abstract:
    The concentrations of interleukin-1 alpha (IL-1 alpha) and IL-6 in pregnancy-associated tissues were investigated in term labour and delivery in the absence of labour (elective Caesarean section). Samples of amniotic fluid, placenta, fetal membranes, umbilical venous and, where possible, umbilical arterial blood were collected at delivery (37-41 weeks of gestation). Maternal blood was sampled during labour. Fluid and tissue extracts were assayed for IL-1 alpha and IL-6 by radioimmunoassay. Placenta and membranes were examined histologically for evidence of infection. Concentrations of IL-1 alpha and IL-6 in amniotic fluid and membrane extract, and IL-1 alpha in maternal and fetal blood, were raised after the onset of labour. Concentrations of both cytokines in the placenta remained unchanged. There was a good correlation between concentrations of both cytokines in amniotic fluid and membranes. There was also a significant correlation between concentrations of IL-1 alpha and IL-6 in amniotic fluid, placenta and membranes. It is suggested that the fetal membranes or maternal decidua, but not the placenta, internal fetal or maternal tissues, are the main sources of IL-1 alpha and IL-6 during labour.
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