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  • Title: Materno-fetal immunotolerance: is Interleukin-1 a fundamental mediator in placental viviparity?
    Author: Paulesu L, Romagnoli R, Bigliardi E.
    Journal: Dev Comp Immunol; 2005; 29(5):409-15. PubMed ID: 15707662.
    Abstract:
    Cytokines are important regulators of materno-fetal immunotolerance in mammals. They act within an intricate network, in which the balance among different cytokines contributes to the success of reproductive processes. Despite numerous studies, however, the role of cytokines at the materno-fetal interface remains largely unknown. Interleukin-1 (IL-1) is a proinflammatory cytokine with many functions in the immune system and in defence against infections. There have been very many studies of the presence and role of IL-1 in human and murine reproduction. Although studies on mammals have shown that IL-1 is an essential mediator in embryo implantation and establishment of pregnancy, mice that are transgenic for most components of the IL-1 family breed normally, suggesting that IL-1 acts in concert with other cytokines at the materno-fetal interface. We recently showed that IL-1 is also expressed by the placenta of non-mammalian vertebrates, including some squamate reptiles and elasmobranch fishes. The expression of IL-1 at the materno-fetal interface in the phylogenetically oldest extant placental vertebrates suggests that IL-1 is a fundamental regulator of materno-fetal relationships.
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