1. Maternal-fetal immune responses in pregnant women infected with SARS-CoV-2
- Author
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Valeria Garcia-Flores, Roberto Romero, Yi Xu, Kevin R. Theis, Marcia Arenas-Hernandez, Derek Miller, Azam Peyvandipour, Gaurav Bhatti, Jose Galaz, Meyer Gershater, Dustyn Levenson, Errile Pusod, Li Tao, David Kracht, Violetta Florova, Yaozhu Leng, Kenichiro Motomura, Robert Para, Megan Faucett, Chaur-Dong Hsu, Gary Zhang, Adi L. Tarca, Roger Pique-Regi, and Nardhy Gomez-Lopez
- Subjects
Placenta ,viruses ,General Physics and Astronomy ,Umbilical cord ,Umbilical Cord ,Pregnancy ,Pregnancy Complications, Infectious ,skin and connective tissue diseases ,reproductive and urinary physiology ,education.field_of_study ,Multidisciplinary ,Immune evasion ,Reverse Transcriptase Polymerase Chain Reaction ,Neonatal Immunity ,medicine.anatomical_structure ,Fetal circulation ,Cord blood ,embryonic structures ,Cytokines ,RNA, Viral ,Female ,Reproductive signs and symptoms ,Adult ,IgM ,IgG ,Science ,Population ,T cells ,Immunoglobulins ,Article ,General Biochemistry, Genetics and Molecular Biology ,Young Adult ,Fetus ,Immune system ,medicine ,Humans ,education ,SARS-CoV-2 ,business.industry ,Macrophages ,fungi ,Immunity ,Infant, Newborn ,COVID-19 ,General Chemistry ,biochemical phenomena, metabolism, and nutrition ,medicine.disease ,Infectious Disease Transmission, Vertical ,Immunoglobulin M ,Viral infection ,Immunoglobulin G ,Immunology ,business - Abstract
Pregnant women represent a high-risk population for severe/critical COVID-19 and mortality. However, the maternal-fetal immune responses initiated by SARS-CoV-2 infection, and whether this virus is detectable in the placenta, are still under investigation. Here we show that SARS-CoV-2 infection during pregnancy primarily induces unique inflammatory responses at the maternal-fetal interface, which are largely governed by maternal T cells and fetal stromal cells. SARS-CoV-2 infection during pregnancy is also associated with humoral and cellular immune responses in the maternal blood, as well as with a mild cytokine response in the neonatal circulation (i.e., umbilical cord blood), without compromising the T-cell repertoire or initiating IgM responses. Importantly, SARS-CoV-2 is not detected in the placental tissues, nor is the sterility of the placenta compromised by maternal viral infection. This study provides insight into the maternal-fetal immune responses triggered by SARS-CoV-2 and emphasizes the rarity of placental infection., As pregnant women are considered vulnerable to SARSCoV-2 infection, it is important to investigate the actual risks involved. The authors show here that, while a T cell-dominant inflammatory response is observed at the maternal-foetal interface, the virus remains undetectable in the placenta but triggers specific immune responses in the neonatal (umbilical cord blood) circulation.
- Published
- 2022