IFITM proteins inhibit placental syncytiotrophoblast formation and promote fetal demise

Julian Buchrieser, Séverine A. Degrelle, Thérèse Couderc, Quentin Nevers, Olivier Disson, Caroline Manet, Daniel A. Donahue, Françoise Porrot, Kenzo Hugo Hillion, Emeline Perthame, Marlene V. Arroyo, Sylvie Souquere, Katinka Ruigrok, Anne Dupressoir, Thierry Heidmann, Xavier Montagutelli, Thierry Fournier, Marc Lecuit, Olivier Schwartz

    Résultats de recherche: Contribution à un journalArticleRevue par des pairs

    104 Citations (Scopus)

    Résumé

    Elevated levels of type I interferon (IFN) during pregnancy are associated with intrauterine growth retardation, preterm birth, and fetal demise through mechanisms that are not well understood. A critical step of placental development is the fusion of trophoblast cells into a multinucleated syncytiotrophoblast (ST) layer. Fusion is mediated by syncytins, proteins deriving from ancestral endogenous retroviral envelopes. Using cultures of human trophoblasts or mouse cells, we show that IFN-induced transmembrane proteins (IFITMs), a family of restriction factors blocking the entry step of many viruses, impair ST formation and inhibit syncytin-mediated fusion. Moreover, the IFN inducer polyinosinic:polycytidylic acid promotes fetal resorption and placental abnormalities in wild-type but not in Ifitm-deleted mice. Thus, excessive levels of IFITMs may mediate the pregnancy complications observed during congenital infections and other IFN-induced pathologies.

    langue originaleAnglais
    Pages (de - à)176-180
    Nombre de pages5
    journalScience
    Volume365
    Numéro de publication6449
    Les DOIs
    étatPublié - 1 janv. 2019

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