1. Hofbauer cells and COVID-19 in pregnancy: Molecular pathology analysis of villous macrophages, endothelial cells, and placental findings from 22 placentas infected by SARS-CoV-2 with and without fetal transmission
- Author
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Schwartz, D.A., Baldewijns, M., Benachi, A., Bugatti, M., Bulfamante, G., Cheng, K., Collins, R.R.J., Debelenko, L., Luca, D. de, Facchetti, F., Fitzgerald, B., Levitan, D., Linn, R.L., Marcelis, L., Morotti, D., Morotti, R., Patane, L., Prevot, S., Pulinx, B., Saad, A.G., Schoenmakers, S., Strybol, D., Thomas, K., Tosi, D., Toto, V., Meeren, L.E. van der, Verdijk, R.M., Vivanti, A.J., Zaigham, M., Obstetrics & Gynecology, and Pathology
- Subjects
Adult ,Male ,Placenta ,Infectious Disease Transmission ,viruses ,VIRAL-INFECTION ,Research & Experimental Medicine ,PROCOAGULANT ,PHAGOCYTOSIS ,SDG 3 - Good Health and Well-being ,Pregnancy ,Pathology ,Humans ,Vertical ,Endothelium ,reproductive and urinary physiology ,Cell Proliferation ,Retrospective Studies ,Science & Technology ,Hyperplasia ,SARS-CoV-2 ,Macrophages ,fungi ,PROLIFERATION ,Infectious ,COVID-19 ,Infant ,Stillbirth ,Newborn ,Trophoblasts ,Pregnancy Complications ,body regions ,Medical Laboratory Technology ,Medicine, Research & Experimental ,embryonic structures ,Female ,Infant, Newborn ,Pregnancy Complications, Infectious ,Infectious Disease Transmission, Vertical ,Life Sciences & Biomedicine - Abstract
CONTEXT.—: SARS-CoV-2 can undergo maternal-fetal transmission, heightening interest in the placental pathology findings from this infection. Transplacental SARS-CoV-2 transmission is typically accompanied by chronic histiocytic intervillositis together with necrosis and positivity of syncytiotrophoblast for SARS-CoV-2. Hofbauer cells are placental macrophages that have been involved in viral diseases, including HIV and Zika virus, but their involvement in SARS-CoV-2 is unknown. OBJECTIVE.—: To determine whether SARS-CoV-2 can extend beyond the syncytiotrophoblast to enter Hofbauer cells, endothelium, and other villous stromal cells in infected placentas of liveborn and stillborn infants. DESIGN.—: Case-based retrospective analysis by 29 perinatal and molecular pathology specialists of placental findings from a preselected cohort of 22 SARS-CoV-2-infected placentas delivered to pregnant women testing positive for SARS-CoV-2 from 7 countries. Molecular pathology methods were used to investigate viral involvement of Hofbauer cells, villous capillary endothelium, syncytiotrophoblast, and other fetal-derived cells. RESULTS.—: Chronic histiocytic intervillositis and trophoblast necrosis were present in all 22 placentas (100%). SARS-CoV-2 was identified in Hofbauer cells from 4 of 22 placentas (18.2%). Villous capillary endothelial staining was positive in 2 of 22 cases (9.1%), both of which also had viral positivity in Hofbauer cells. Syncytiotrophoblast staining occurred in 21 of 22 placentas (95.5%). Hofbauer cell hyperplasia was present in 3 of 22 placentas (13.6%). In the 7 cases having documented transplacental infection of the fetus, 2 (28.6%) occurred in placentas with Hofbauer cell staining positive for SARS-CoV-2. CONCLUSIONS.—: SARS-CoV-2 can extend beyond the trophoblast into the villous stroma, involving Hofbauer cells and capillary endothelial cells, in a small number of infected placentas. Most cases of SARS-CoV-2 transplacental fetal infection occur without Hofbauer cell involvement. ispartof: ARCHIVES OF PATHOLOGY & LABORATORY MEDICINE vol:145 issue:11 pages:1328-1340 ispartof: location:United States status: published
- Published
- 2021