TY - JOUR
T1 - IFITM proteins inhibit placental syncytiotrophoblast formation and promote fetal demise
AU - Buchrieser, Julian
AU - Degrelle, Séverine A.
AU - Couderc, Thérèse
AU - Nevers, Quentin
AU - Disson, Olivier
AU - Manet, Caroline
AU - Donahue, Daniel A.
AU - Porrot, Françoise
AU - Hillion, Kenzo Hugo
AU - Perthame, Emeline
AU - Arroyo, Marlene V.
AU - Souquere, Sylvie
AU - Ruigrok, Katinka
AU - Dupressoir, Anne
AU - Heidmann, Thierry
AU - Montagutelli, Xavier
AU - Fournier, Thierry
AU - Lecuit, Marc
AU - Schwartz, Olivier
N1 - Publisher Copyright:
© 2019 American Association for the Advancement of Science. All rights reserved.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85068955277&partnerID=8YFLogxK
U2 - 10.1126/science.aaw7733
DO - 10.1126/science.aaw7733
M3 - Article
C2 - 31296770
AN - SCOPUS:85068955277
SN - 0036-8075
VL - 365
SP - 176
EP - 180
JO - Science
JF - Science
IS - 6449
ER -