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Abstract
The existence of coronaviruses has been known for many years. These viruses cause significant disease that primarily seems to affect agricultural species. Human coronavirus disease due to the 2002 outbreak of Severe Acute Respiratory Syndrome and the 2012 outbreak of Middle East Respiratory Syndrome made headlines; however, these outbreaks were controlled, and public concern quickly faded. This complacency ended in late 2019 when alarms were raised about a mysterious virus responsible for numerous illnesses and deaths in China. As we now know, this novel disease called Coronavirus Disease 2019 (COVID-19) was caused by Severe acute respiratory syndrome-related-coronavirus-2 (SARS-CoV-2) and rapidly became a worldwide pandemic. Luckily, decades of research into animal coronaviruses hastened our understanding of the genetics, structure, transmission, and pathogenesis of these viruses. Coronaviruses infect a wide range of wild and domestic animals, with significant economic impact in several agricultural species. Their large genome, low dependency on host cellular proteins, and frequent recombination allow coronaviruses to successfully cross species barriers and adapt to different hosts including humans. The study of the animal diseases provides an understanding of the virus biology and pathogenesis and has assisted in the rapid development of the SARS-CoV-2 vaccines. Here, we briefly review the classification, origin, etiology, transmission mechanisms, pathogenesis, clinical signs, diagnosis, treatment, and prevention strategies, including available vaccines, for coronaviruses that affect domestic, farm, laboratory, and wild animal species. We also briefly describe the coronaviruses that affect humans. Expanding our knowledge of this complex group of viruses will better prepare us to design strategies to prevent and/or minimize the impact of future coronavirus outbreaks.
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Key Words
- bcov, bovine coronavirus
- ccov, canine coronavirus
- cov(s), coronavirus(es)
- covid-19, coronavirus disease 2019
- crcov, canine respiratory coronavirus
- e, coronaviral envelope protein
- ecov, equine coronavirus
- fcov, feline coronavirus
- fipv, feline infectious peritonitis virus
- gfcov, guinea fowl coronavirus
- hcov, human coronavirus
- ibv, infectious bronchitis virus
- m, coronaviral membrane protein
- mers, middle east respiratory syndrome-coronavirus
- mhv, mouse hepatitis virus
- pedv, porcine epidemic diarrhea virus
- pdcov, porcine deltacoronavirus
- phcov, pheasant coronavirus
- phev, porcine hemagglutinating encephalomyelitis virus
- prcov, porcine respiratory coronavirus
- rt-pcr, reverse transcriptase polymerase chain reaction
- s, coronaviral spike protein
- sads-cov, swine acute diarrhea syndrome-coronavirus
- sars-cov, severe acute respiratory syndrome-coronavirus
- sars-cov-2, severe acute respiratory syndrome–coronavirus–2
- tcov, turkey coronavirus
- tgev, transmissible gastroenteritis virus
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Affiliation(s)
- Alfonso S Gozalo
- Comparative Medicine Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland;,
| | - Tannia S Clark
- Office of Laboratory Animal Medicine, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - David M Kurtz
- Comparative Medicine Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, Durham, North Carolina
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Motwani R, Deshmukh V, Kumar A, Kumari C, Raza K, Krishna H. Pathological involvement of placenta in COVID-19: a systematic review. LE INFEZIONI IN MEDICINA 2022; 30:157-167. [PMID: 35693050 PMCID: PMC9177177 DOI: 10.53854/liim-3002-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
The mammalian placenta, which is responsible for bonding between the mother and the fetus, is one of the first organs to develop. Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) infection has caused a great threat to public health and affected almost all the organs including the placenta. Owing to limited available data on vertical transmission and pathological changes in the placenta of SARS-CoV-2 positive patients, we aim to review and summarize histopathological and ultrastructural changes in the placental tissue following SARS-CoV-2 infection. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2009 guidelines were used for review writing. Multiple studies have reported significant pathological changes in the placental tissue of SARS-CoV-2 positive mothers. On the other hand, some studies have demonstrated either no or very little involvement of the placental tissue. The most common pathological changes reported are fetal and maternal vascular malformation, villitis of unknown etiology, thrombus formation in the intervillous space and sub-chorionic space, and chorangiosis. Reports on vertical transmission are less in number. The observations of this review present a strong base for the pathological involvement of the placenta in SARS-CoV-2 infected mothers. However, a smaller number of original studies have been done until now, and most of them have small sample sizes and lack matched control groups, which are the big limitations for drawing an effective conclusion at this stage. Antenatal care can be improved by a better understanding of the correlation between maternal SARS-CoV-2 infection and placental pathology in COVID-19.
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Affiliation(s)
- Rohini Motwani
- Department of Anatomy, All India Institute of Medical Sciences, Bibinagar, Hyderabad (Telangana), India
| | - Vishwajit Deshmukh
- Department of Anatomy, All India Institute of Medical Sciences, Nagpur (Maharashtra), India
| | - Ashutosh Kumar
- Department of Anatomy, All India Institute of Medical Sciences, Patna (Bihar), India
| | - Chiman Kumari
- Department of Anatomy, Post Graduate Institute of Medical Education & Research, Chandigarh, India
| | - Khursheed Raza
- Department of Anatomy, All India Institute of Medical Sciences, Deoghar (Jharkhand), India
| | - Hare Krishna
- Department of Anatomy, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
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Caldera-Crespo LA, Paidas MJ, Roy S, Schulman CI, Kenyon NS, Daunert S, Jayakumar AR. Experimental Models of COVID-19. Front Cell Infect Microbiol 2022; 11:792584. [PMID: 35096645 PMCID: PMC8791197 DOI: 10.3389/fcimb.2021.792584] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 11/26/2021] [Indexed: 12/20/2022] Open
Abstract
COVID-19 is the most consequential pandemic of the 21st century. Since the earliest stage of the 2019-2020 epidemic, animal models have been useful in understanding the etiopathogenesis of SARS-CoV-2 infection and rapid development of vaccines/drugs to prevent, treat or eradicate SARS-CoV-2 infection. Early SARS-CoV-1 research using immortalized in-vitro cell lines have aided in understanding different cells and receptors needed for SARS-CoV-2 infection and, due to their ability to be easily manipulated, continue to broaden our understanding of COVID-19 disease in in-vivo models. The scientific community determined animal models as the most useful models which could demonstrate viral infection, replication, transmission, and spectrum of illness as seen in human populations. Until now, there have not been well-described animal models of SARS-CoV-2 infection although transgenic mouse models (i.e. mice with humanized ACE2 receptors with humanized receptors) have been proposed. Additionally, there are only limited facilities (Biosafety level 3 laboratories) available to contribute research to aid in eventually exterminating SARS-CoV-2 infection around the world. This review summarizes the most successful animal models of SARS-CoV-2 infection including studies in Non-Human Primates (NHPs) which were found to be susceptible to infection and transmitted the virus similarly to humans (e.g., Rhesus macaques, Cynomolgus, and African Green Monkeys), and animal models that do not require Biosafety level 3 laboratories (e.g., Mouse Hepatitis Virus models of COVID-19, Ferret model, Syrian Hamster model). Balancing safety, mimicking human COVID-19 and robustness of the animal model, the Murine Hepatitis Virus-1 Murine model currently represents the most optimal model for SARS-CoV-2/COVID19 research. Exploring future animal models will aid researchers/scientists in discovering the mechanisms of SARS-CoV-2 infection and in identifying therapies to prevent or treat COVID-19.
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Affiliation(s)
- Luis A Caldera-Crespo
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
- St. George's University Graduate Medical Education Program, University Centre Grenada, West Indies, Grenada
| | - Michael J Paidas
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Sabita Roy
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Carl I Schulman
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Norma Sue Kenyon
- Department of Microbiology & Immunology, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Biomedical Engineering, University of Miami Miller School of Medicine, Miami, FL, United States
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Sylvia Daunert
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, United States
- Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami Miller School of Medicine, Miami, FL, United States
- University of Miami Clinical and Translational Science Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Arumugam R Jayakumar
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
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Lu-Culligan A, Chavan AR, Vijayakumar P, Irshaid L, Courchaine EM, Milano KM, Tang Z, Pope SD, Song E, Vogels CBF, Lu-Culligan WJ, Campbell KH, Casanovas-Massana A, Bermejo S, Toothaker JM, Lee HJ, Liu F, Schulz W, Fournier J, Muenker MC, Moore AJ, Konnikova L, Neugebauer KM, Ring A, Grubaugh ND, Ko AI, Morotti R, Guller S, Kliman HJ, Iwasaki A, Farhadian SF. Maternal respiratory SARS-CoV-2 infection in pregnancy is associated with a robust inflammatory response at the maternal-fetal interface. MED 2021; 2:591-610.e10. [PMID: 33969332 PMCID: PMC8084634 DOI: 10.1016/j.medj.2021.04.016] [Citation(s) in RCA: 87] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/01/2021] [Accepted: 04/16/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Pregnant women are at increased risk for severe outcomes from coronavirus disease 2019 (COVID-19), but the pathophysiology underlying this increased morbidity and its potential effect on the developing fetus is not well understood. METHODS We assessed placental histology, ACE2 expression, and viral and immune dynamics at the term placenta in pregnant women with and without respiratory severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. FINDINGS The majority (13 of 15) of placentas analyzed had no detectable viral RNA. ACE2 was detected by immunohistochemistry in syncytiotrophoblast cells of the normal placenta during early pregnancy but was rarely seen in healthy placentas at full term, suggesting that low ACE2 expression may protect the term placenta from viral infection. Using immortalized cell lines and primary isolated placental cells, we found that cytotrophoblasts, the trophoblast stem cells and precursors to syncytiotrophoblasts, rather than syncytiotrophoblasts or Hofbauer cells, are most vulnerable to SARS-CoV-2 infection in vitro. To better understand potential immune mechanisms shielding placental cells from infection in vivo, we performed bulk and single-cell transcriptomics analyses and found that the maternal-fetal interface of SARS-CoV-2-infected women exhibited robust immune responses, including increased activation of natural killer (NK) and T cells, increased expression of interferon-related genes, as well as markers associated with pregnancy complications such as preeclampsia. CONCLUSIONS SARS-CoV-2 infection in late pregnancy is associated with immune activation at the maternal-fetal interface even in the absence of detectable local viral invasion. FUNDING NIH (T32GM007205, F30HD093350, K23MH118999, R01AI157488, U01DA040588) and Fast Grant funding support from Emergent Ventures at the Mercatus Center.
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Affiliation(s)
- Alice Lu-Culligan
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Arun R Chavan
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Pavithra Vijayakumar
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Lina Irshaid
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Edward M Courchaine
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
- Department of Cell Biology, Yale School of Medicine, New Haven, CT, USA
| | - Kristin M Milano
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Zhonghua Tang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Scott D Pope
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Eric Song
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Chantal B F Vogels
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - William J Lu-Culligan
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
- Department of Cell Biology, Yale School of Medicine, New Haven, CT, USA
| | - Katherine H Campbell
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Arnau Casanovas-Massana
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Santos Bermejo
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Jessica M Toothaker
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hannah J Lee
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Feimei Liu
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Wade Schulz
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
| | - John Fournier
- Section of Infectious Diseases, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
| | - M Catherine Muenker
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Adam J Moore
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Liza Konnikova
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Karla M Neugebauer
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Aaron Ring
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Nathan D Grubaugh
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Albert I Ko
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Raffaella Morotti
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Seth Guller
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Harvey J Kliman
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Akiko Iwasaki
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
- Department of Molecular, Cellular and Developmental Biology, New Haven, CT, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
| | - Shelli F Farhadian
- Section of Infectious Diseases, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
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Lu-Culligan A, Chavan AR, Vijayakumar P, Irshaid L, Courchaine EM, Milano KM, Tang Z, Pope SD, Song E, Vogels CB, Lu-Culligan WJ, Campbell KH, Casanovas-Massana A, Bermejo S, Toothaker JM, Lee HJ, Liu F, Schulz W, Fournier J, Muenker MC, Moore AJ, Konnikova L, Neugebauer KM, Ring A, Grubaugh ND, Ko AI, Morotti R, Guller S, Kliman HJ, Iwasaki A, Farhadian SF. SARS-CoV-2 infection in pregnancy is associated with robust inflammatory response at the maternal-fetal interface. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2021:2021.01.25.21250452. [PMID: 33532791 PMCID: PMC7852242 DOI: 10.1101/2021.01.25.21250452] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Pregnant women appear to be at increased risk for severe outcomes associated with COVID-19, but the pathophysiology underlying this increased morbidity and its potential impact on the developing fetus is not well understood. In this study of pregnant women with and without COVID-19, we assessed viral and immune dynamics at the placenta during maternal SARS-CoV-2 infection. Amongst uninfected women, ACE2 was detected by immunohistochemistry in syncytiotrophoblast cells of the normal placenta during early pregnancy but was rarely seen in healthy placentas at full term. Term placentas from women infected with SARS-CoV-2, however, displayed a significant increase in ACE2 levels. Using immortalized cell lines and primary isolated placental cells, we determined the vulnerability of various placental cell types to direct infection by SARS-CoV-2 in vitro. Yet, despite the susceptibility of placental cells to SARS-CoV-2 infection, viral RNA was detected in the placentas of only a subset (~13%) of women in this cohort. Through single cell transcriptomic analyses, we found that the maternal-fetal interface of SARS-CoV-2-infected women exhibited markers associated with pregnancy complications, such as preeclampsia, and robust immune responses, including increased activation of placental NK and T cells and increased expression of interferon-related genes. Overall, this study suggests that SARS-CoV-2 is associated with immune activation at the maternal-fetal interface even in the absence of detectable local viral invasion. While this likely represents a protective mechanism shielding the placenta from infection, inflammatory changes in the placenta may also contribute to poor pregnancy outcomes and thus warrant further investigation.
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Affiliation(s)
- Alice Lu-Culligan
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Arun R. Chavan
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Pavithra Vijayakumar
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Lina Irshaid
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Edward M. Courchaine
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
- Department of Cell Biology, Yale School of Medicine, New Haven, CT, USA
| | - Kristin M. Milano
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Zhonghua Tang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Scott D. Pope
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Eric Song
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Chantal B.F. Vogels
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - William J. Lu-Culligan
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
- Department of Cell Biology, Yale School of Medicine, New Haven, CT, USA
| | - Katherine H. Campbell
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Arnau Casanovas-Massana
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Santos Bermejo
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Jessica M. Toothaker
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hannah J. Lee
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Feimei Liu
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Wade Schulz
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
| | - John Fournier
- Section of Infectious Diseases, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
| | - M. Catherine Muenker
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Adam J. Moore
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | | | - Liza Konnikova
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Karla M. Neugebauer
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Aaron Ring
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Nathan D. Grubaugh
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Albert I. Ko
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Raffaella Morotti
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Seth Guller
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Harvey J. Kliman
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Akiko Iwasaki
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
- Department of Molecular, Cellular and Developmental Biology, New Haven, CT, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
| | - Shelli F. Farhadian
- Section of Infectious Diseases, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
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Kotlyar AM, Grechukhina O, Chen A, Popkhadze S, Grimshaw A, Tal O, Taylor HS, Tal R. Vertical transmission of coronavirus disease 2019: a systematic review and meta-analysis. Am J Obstet Gynecol 2021; 224:35-53.e3. [PMID: 32739398 PMCID: PMC7392880 DOI: 10.1016/j.ajog.2020.07.049] [Citation(s) in RCA: 363] [Impact Index Per Article: 121.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/23/2020] [Accepted: 07/29/2020] [Indexed: 02/08/2023]
Abstract
OBJECTIVE This study aimed to conduct a systematic review of the current literature to determine estimates of vertical transmission of coronavirus disease 2019 based on early RNA detection of severe acute respiratory syndrome coronavirus 2 after birth from various neonatal or fetal sources and neonatal serology. DATA SOURCES Eligible studies published until May 28, 2020, were retrieved from PubMed, EMBASE, medRxiv, and bioRxiv collection databases. STUDY ELIGIBILITY CRITERIA This systematic review included cohort studies, case series, and case reports of pregnant women who received a coronavirus disease 2019 diagnosis using severe acute respiratory syndrome coronavirus 2 viral RNA test and had reported data regarding the testing of neonates or fetuses for severe acute respiratory syndrome coronavirus 2 immediately after birth and within 48 hours of birth. A total of 30 eligible case reports describing 43 tested neonates and 38 cohort or case series studies describing 936 tested neonates were included. STUDY APPRAISAL AND SYNTHESIS METHODS The methodological quality of all included studies was evaluated by a modified version of the Newcastle-Ottawa scale. Quantitative synthesis was performed on cohort or case series studies according to the neonatal biological specimen site to reach pooled proportions of vertical transmission. RESULTS Our quantitative synthesis revealed that of 936 neonates from mothers with coronavirus disease 2019, 27 neonates had a positive result for severe acute respiratory syndrome coronavirus 2 viral RNA test using nasopharyngeal swab, indicating a pooled proportion of 3.2% (95% confidence interval, 2.2-4.3) for vertical transmission. Of note, the pooled proportion of severe acute respiratory syndrome coronavirus 2 positivity in neonates by nasopharyngeal swab in studies from China was 2.0% (8/397), which was similar to the pooled proportion of 2.7% (14/517) in studies from outside of China. Severe acute respiratory syndrome coronavirus 2 viral RNA testing in neonatal cord blood was positive in 2.9% of samples (1/34), 7.7% of placenta samples (2/26), 0% of amniotic fluid (0/51), 0% of urine samples (0/17), and 9.7% of fecal or rectal swabs (3/31). Neonatal serology was positive in 3 of 82 samples (3.7%) (based on the presence of immunoglobulin M). CONCLUSION Vertical transmission of severe acute respiratory syndrome coronavirus 2 is possible and seems to occur in a minority of cases of maternal coronavirus disease 2019 infection in the third trimester. The rates of infection are similar to those of other pathogens that cause congenital infections. However, given the paucity of early trimester data, no assessment can yet be made regarding the rates of vertical transmission in early pregnancy and potential risk for consequent fetal morbidity and mortality.
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Affiliation(s)
- Alexander M Kotlyar
- Sections of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, Yale University, New Haven, CT.
| | - Olga Grechukhina
- Maternal-Fetal Medicine, Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, Yale University, New Haven, CT
| | - Alice Chen
- Sections of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, Yale University, New Haven, CT
| | - Shota Popkhadze
- Maternal-Fetal Medicine, Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, Yale University, New Haven, CT
| | - Alyssa Grimshaw
- Harvey Cushing/John Hay Whitney Medical Library, Yale University, New Haven, CT
| | - Oded Tal
- School of Business, Conestoga College, Kitchener, Ontario, Canada
| | - Hugh S Taylor
- Sections of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, Yale University, New Haven, CT
| | - Reshef Tal
- Sections of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, Yale University, New Haven, CT
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Ghosh S, Malik YS. Drawing Comparisons between SARS-CoV-2 and the Animal Coronaviruses. Microorganisms 2020; 8:E1840. [PMID: 33238451 PMCID: PMC7700164 DOI: 10.3390/microorganisms8111840] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/01/2020] [Accepted: 11/19/2020] [Indexed: 12/19/2022] Open
Abstract
The COVID-19 pandemic, caused by a novel zoonotic coronavirus (CoV), SARS-CoV-2, has infected 46,182 million people, resulting in 1,197,026 deaths (as of 1 November 2020), with devastating and far-reaching impacts on economies and societies worldwide. The complex origin, extended human-to-human transmission, pathogenesis, host immune responses, and various clinical presentations of SARS-CoV-2 have presented serious challenges in understanding and combating the pandemic situation. Human CoVs gained attention only after the SARS-CoV outbreak of 2002-2003. On the other hand, animal CoVs have been studied extensively for many decades, providing a plethora of important information on their genetic diversity, transmission, tissue tropism and pathology, host immunity, and therapeutic and prophylactic strategies, some of which have striking resemblance to those seen with SARS-CoV-2. Moreover, the evolution of human CoVs, including SARS-CoV-2, is intermingled with those of animal CoVs. In this comprehensive review, attempts have been made to compare the current knowledge on evolution, transmission, pathogenesis, immunopathology, therapeutics, and prophylaxis of SARS-CoV-2 with those of various animal CoVs. Information on animal CoVs might enhance our understanding of SARS-CoV-2, and accordingly, benefit the development of effective control and prevention strategies against COVID-19.
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Affiliation(s)
- Souvik Ghosh
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, Basseterre 334, Saint Kitts and Nevis
| | - Yashpal S. Malik
- College of Animal Biotechnology, Guru Angad Dev Veterinary and Animal Science University, Ludhiana 141004, India;
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Körner RW, Majjouti M, Alcazar MAA, Mahabir E. Of Mice and Men: The Coronavirus MHV and Mouse Models as a Translational Approach to Understand SARS-CoV-2. Viruses 2020; 12:E880. [PMID: 32806708 PMCID: PMC7471983 DOI: 10.3390/v12080880] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 02/06/2023] Open
Abstract
The fatal acute respiratory coronavirus disease 2019 (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Since COVID-19 was declared a pandemic by the World Health Organization in March 2020, infection and mortality rates have been rising steadily worldwide. The lack of a vaccine, as well as preventive and therapeutic strategies, emphasize the need to develop new strategies to mitigate SARS-CoV-2 transmission and pathogenesis. Since mouse hepatitis virus (MHV), severe acute respiratory syndrome coronavirus (SARS-CoV), and SARS-CoV-2 share a common genus, lessons learnt from MHV and SARS-CoV could offer mechanistic insights into SARS-CoV-2. This review provides a comprehensive review of MHV in mice and SARS-CoV-2 in humans, thereby highlighting further translational avenues in the development of innovative strategies in controlling the detrimental course of SARS-CoV-2. Specifically, we have focused on various aspects, including host species, organotropism, transmission, clinical disease, pathogenesis, control and therapy, MHV as a model for SARS-CoV and SARS-CoV-2 as well as mouse models for infection with SARS-CoV and SARS-CoV-2. While MHV in mice and SARS-CoV-2 in humans share various similarities, there are also differences that need to be addressed when studying murine models. Translational approaches, such as humanized mouse models are pivotal in studying the clinical course and pathology observed in COVID-19 patients. Lessons from prior murine studies on coronavirus, coupled with novel murine models could offer new promising avenues for treatment of COVID-19.
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Affiliation(s)
- Robert W. Körner
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany;
| | - Mohamed Majjouti
- Comparative Medicine, Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany;
| | - Miguel A. Alejandre Alcazar
- Department of Pediatric and Adolescent Medicine, Translational Experimental Pediatrics—Experimental Pulmonology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany;
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
- Member of the German Center for Lung Research (DZL), Institute for Lung Health, University of Giessen and Marburg Lung Center (UGMLC), 50937 Cologne, Germany
| | - Esther Mahabir
- Comparative Medicine, Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany;
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Abstract
This study describes the pathology and clinical information on 20 placentas whose mother tested positive for the novel Coronovirus (2019-nCoV) cases. Ten of the 20 cases showed some evidence of fetal vascular malperfusion or fetal vascular thrombosis. The significance of these findings is unclear and needs further study.
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Affiliation(s)
- Rebecca N Baergen
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, New York
| | - Debra S Heller
- Department of Pathology, Immunology & Laboratory Medicine, Rutgers-New Jersey Medical School, Newark, New Jersey
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10
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Muldoon KM, Fowler KB, Pesch MH, Schleiss MR. SARS-CoV-2: Is it the newest spark in the TORCH? J Clin Virol 2020; 127:104372. [PMID: 32335336 PMCID: PMC7195345 DOI: 10.1016/j.jcv.2020.104372] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 04/11/2020] [Indexed: 02/07/2023]
Abstract
The SARS-CoV-2 pandemic poses under-appreciated risks during pregnancy, and perinatal infections endanger newborn outcomes. SARS-CoV-2 virus is transmitted in utero, although the clinical manifestations of neonatal infection are not understood. While the route of infection is uncertain, infection control measures should be developed to protect the newborn infant. Breast milk acquisition of COVID-19 is not described, and breast-feeding remains the preferred source of infant nutrition. The study of SARS-CoV-2 vaccines should target not only protection of the pregnant patient, but also the newborn infant.
Amid the rapidly evolving global coronavirus disease 2019 (COVID-19) pandemic that has already had profound effects on public health and medical infrastructure globally, many questions remain about its impact on child health. The unique needs of neonates and children, and their role in the spread of the virus (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) should be included in preparedness and response plans. Fetuses and newborn infants may be uniquely vulnerable to the damaging consequences of congenitally- or perinatally-acquired SARS-CoV-2 infection, but data are limited about outcomes of COVID-19 disease during pregnancy. Therefore, information on illnesses associated with other highly pathogenic coronaviruses (i.e., severe acute respiratory syndrome (SARS) and the Middle East respiratory syndrome [MERS]), as well as comparisons to common congenital infections, such as cytomegalovirus (CMV), are warranted. Research regarding the potential routes of acquisition of SARS-CoV-2 infection in the prenatal and perinatal setting is of a high public health priority. Vaccines targeting women of reproductive age, and in particular pregnant patients, should be evaluated in clinical trials and should include the endpoints of neonatal infection and disease.
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Affiliation(s)
- Kathleen M Muldoon
- Department of Anatomy, College of Graduate Studies and Arizona College of Osteopathic Medicine, Midwestern University, Glendale, AZ, 85308, USA; National CMV Foundation, Tampa, FL, 33679, USA
| | - Karen B Fowler
- Department of Pediatrics, University of Alabama at Birmingham Medical School, Pediatric Division of Infectious Diseases, Birmingham, AL, 35233, USA; National CMV Foundation, Tampa, FL, 33679, USA
| | - Megan H Pesch
- Department of Pediatrics, University of Michigan Medical School, Division of Developmental and Behavioral Pediatrics, Ann Arbor, MI, 48109, USA; National CMV Foundation, Tampa, FL, 33679, USA
| | - Mark R Schleiss
- Division of Pediatric Infectious Diseases and Immunology, University of Minnesota Medical School, Department of Pediatrics, Minneapolis, MN, 55455, USA; National CMV Foundation, Tampa, FL, 33679, USA.
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Shek WR, Smith AL, Pritchett-Corning KR. Microbiological Quality Control for Laboratory Rodents and Lagomorphs. LABORATORY ANIMAL MEDICINE 2015. [PMCID: PMC7150201 DOI: 10.1016/b978-0-12-409527-4.00011-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Mice (Mus musculus), rats (Rattus norvegicus), other rodent species, and domestic rabbits (Oryctolagus cuniculus) have been used in research for over 100 years. During the first half of the 20th century, microbiological quality control of lab animals was at best rudimentary as colonies were conventionally housed and little or no diagnostic testing was done. Hence, animal studies were often curtailed and confounded by infectious disease (Mobraaten and Sharp, 1999; Morse, 2007; Weisbroth, 1999). By the 1950s, it became apparent to veterinarians in the nascent field of comparative medicine that disease-free animals suitable for research could not be produced by standard veterinary disease control measures (e.g., improved sanitation and nutrition, antimicrobial treatments) in conventional facilities. Henry Foster, the veterinarian who founded Charles River Breeding Laboratories in 1948 and a pioneer in the large-scale production of laboratory rodents, stated in a seminar presented at the 30th anniversary of AALAS, “After a variety of frustrating health-related problems, it was decided that a major change in the company’s philosophy was required and an entirely different approach was essential”. Consequently, he and others developed innovative biosecurity systems to eliminate and exclude pathogens (Allen, 1999). In 1958, Foster reported on the Cesarean-originated barrier-sustained (COBS) process for the large-scale production of specific pathogen-free (SPF) laboratory rodents (Foster, 1958). To eliminate horizontally transmitted pathogens, a hysterectomy was performed on a near-term dam from a contaminated or conventionally housed colony. The gravid uterus was pulled through a disinfectant solution into a sterile flexible film isolator where the pups were removed from the uterus and suckled on axenic (i.e., germ-free) foster dams. After being mated to expand their number and associated with a cocktail of nonpathogenic bacteria to normalize their physiology and prime their immune system, rederived rodents were transferred to so-called barrier rooms for large-scale production. The room-level barrier to adventitious infection entailed disinfection of the room, equipment, and supplies, limiting access to trained and properly gowned personnel, and the application of new technologies such as high-efficiency particulate air-filtration of incoming air (Dubos and Schaedler, 1960; Foster, 1980; Schaedler and Orcutt, 1983; Trexler and Orcutt, 1999). The axenic and associated rodents mentioned in the COBS process are collectively classified as gnotobiotic to indicate that they have a completely known microflora. By contrast, barrier-reared rodent colonies are not gnotobiotic because they are housed in uncovered cages and thus acquire a complex microflora from the environment, supplies, personnel, and other sources. Instead, they are described as SPF to indicate that according to laboratory testing, they are free from infection with a defined list of infectious agents, commonly known as an ‘exclusion’ list.
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Overview of new developments in and the future of cryopreservation in the laboratory mouse. Mamm Genome 2012; 23:572-9. [PMID: 22936001 DOI: 10.1007/s00335-012-9423-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 07/30/2012] [Indexed: 10/27/2022]
Abstract
The large-scale mutagenesis programmes underway around the world are generating thousands of novel GA mouse strains that need to be securely archived. In parallel with advances in mutagenesis, the procedures used to cryopreserve mouse stocks are being continually refined in order to keep pace with demand. Moreover, the construction of extensive research infrastructures for systematic phenotyping is fuelling demand for these novel strains of mice and new approaches to the distribution of frozen and unfrozen embryos and gametes are being developed in order to reduce the dependency on the transportation of live mice. This article highlights some contemporary techniques used to archive, rederive, and transport mouse strains around the world.
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Parker SE, Malone S, Bunte RM, Smith AL. Infectious diseases in wild mice (Mus musculus) collected on and around the University of Pennsylvania (Philadelphia) Campus. Comp Med 2009; 59:424-30. [PMID: 19887025 PMCID: PMC2771607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 05/16/2009] [Accepted: 07/16/2009] [Indexed: 05/28/2023]
Abstract
Laboratory mice serve as important models in biomedical research. Monitoring these animals for infections and infestations and excluding causative agents requires extensive resources. Despite advancements in detection and exclusion over the last several years, these activities remain challenging for many institutions. The infections and infestations present in laboratory mouse colonies are well documented, but their mode of introduction is not always known. One possibility is that wild rodents living near vivaria somehow transmit infections to and between the colonies. This study was undertaken to determine what infectious agents the wild mice on the University of Pennsylvania (Philadelphia) campus were carrying. Wild mice were trapped and evaluated for parasites, viruses, and selected bacteria by using histopathology, serology, and PCR-based assays. Results were compared with known infectious agents historically circulating in the vivaria housing mice on campus and were generally different. Although the ectoparasitic burdens found on the 2 populations were similar, the wild mice had a much lower incidence of endoparasites (most notably pinworms). The seroprevalence of some viral infections was also different, with a low prevalence of mouse hepatitis virus among wild mice. Wild mice had a high prevalence of murine cytomegalovirus, an agent now thought to be confined to wild mouse populations. Helicobacter DNA was amplified from more than 90% of the wild mice (59% positive for H. hepaticus). Given the results of this study, we conclude that wild mice likely are not a source of infection for many of the agents that are detected in laboratory mouse colonies at the University of Pennsylvania.
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Affiliation(s)
- Sharon E Parker
- School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Sarah Malone
- School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ralph M Bunte
- University Laboratory Animal Resources, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Abigail L Smith
- School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- University Laboratory Animal Resources, University of Pennsylvania, Philadelphia, Pennsylvania
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Gagneur A, Dirson E, Audebert S, Vallet S, Legrand-Quillien MC, Laurent Y, Collet M, Sizun J, Oger E, Payan C. Materno-fetal transmission of human coronaviruses: a prospective pilot study. Eur J Clin Microbiol Infect Dis 2008; 27:863-6. [PMID: 18373106 PMCID: PMC7087967 DOI: 10.1007/s10096-008-0505-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Accepted: 03/03/2008] [Indexed: 11/26/2022]
Abstract
This prospective pilot study investigates the possibility of materno-fetal transmission of human coronaviruses (HCoV) responsible for cases of neonatal infection. This vertical transmission was studied with 159 samples from mother-child couples: maternal vaginal (MV) and respiratory (MR) samples during labor; and newborn gastric sample (NG) with detection of HCoV (229E, OC-43, NL-63, HKU1) via real time RT PCR. HCoV was detected in 12 samples (229E: 11; HKU1: 1) from seven mother-child couples. For three couples, only MR tested positive (cases 1–3). For two other couples all three samples (MV, MR and NG) tested positive (cases 4 and 5). For case 6, only MV and NG tested positive. In case 7, only MV was positive. Possible vertical transmission of HCoV was hypothesized in this pilot study and requires further investigation on a larger scale.
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Affiliation(s)
- A Gagneur
- Department of Pediatrics, CHU Morvan, 2 avenue Foch, Brest cedex, France.
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15
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Gagneur A, Dirson E, Audebert S, Vallet S, Quillien MCL, Baron R, Laurent Y, Collet M, Sizun J, Oger E, Payan C. [Vertical transmission of human coronavirus. Prospective pilot study]. ACTA ACUST UNITED AC 2007; 55:525-30. [PMID: 17889450 PMCID: PMC7119136 DOI: 10.1016/j.patbio.2007.07.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Accepted: 07/05/2007] [Indexed: 11/30/2022]
Abstract
Les coronavirus humains (HCoV) ont été impliqués dans la survenue d'infections respiratoires nosocomiales chez les nouveau-nés. Plusieurs cas d'infections néonatales ont été mis en évidence. Cette étude pilote recherche l'existence d'une éventuelle transmission maternofœtale des HCoV pouvant expliquer les cas infections néonatales observées dans les premières 24 heures de vie. Matériel et méthode Étude monocentrique prospective pilote. Étude des couples mère–enfant par la réalisation de trois prélèvements : vaginal et respiratoire chez la mère (VM et RM) lors du travail, gastrique chez le nouveau-né (GNN). Suivi clinique des nouveau-nés et des mères jusqu'à j3. Analyse virologique des échantillons par reverse transcription-polymerase chain reaction (RT-PCR) en temps réel pour la recherche des HCoV 229-E et OC43. Résultats Cent cinquante-neuf couples mère–enfant ont été inclus de juillet 2003 à août 2005. Seul HCoV 229-E a été détecté dans 11 échantillons chez six couples mère–enfant. Pour deux couples, les trois prélèvements (VM, RM et GNN) étaient positifs (cas 1 et 2). Pour le cas 3, seuls le VM et GNN étaient positifs. Pour deux couples, seuls les RM étaient positifs (cas 4 et 5). Pour le cas 6, seul le VM était positif. Pour les trois GNN positifs, aucun enfant n'était symptomatique. Conclusion Une possible transmission verticale des HCoV est mise en évidence dans cette étude pilote qui nécessite désormais d'être poursuivie à plus large échelle. Il convient également d'inclure la recherche des coronavirus humains identifiés récemment, HCoV NL63 et HKU1, et d'analyser le profil génomique des HCoV détectés chez les trois couples mère–enfant positifs.
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Affiliation(s)
- A Gagneur
- Département de Pédiatrie, Inserm CIC 0502, CHU de Brest, Brest, France.
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16
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Dent A, Malhotra I, Mungai P, Muchiri E, Crabb BS, Kazura JW, King CL. Prenatal malaria immune experience affects acquisition of Plasmodium falciparum merozoite surface protein-1 invasion inhibitory antibodies during infancy. THE JOURNAL OF IMMUNOLOGY 2007; 177:7139-45. [PMID: 17082631 DOI: 10.4049/jimmunol.177.10.7139] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
African infants are often born of mothers infected with malaria during pregnancy. This can result in fetal exposure to malaria-infected erythrocytes or their soluble products with subsequent fetal immune priming or tolerance in utero. We performed a cohort study of 30 newborns from a malaria holoendemic area of Kenya to determine whether T cell sensitization to Plasmodium falciparum merozoite surface protein-1 (MSP-1) at birth correlates with infant development of anti-MSP-1 Abs acquired as a consequence of natural malaria infection. Abs to the 42- and 19-kDa C-terminal processed fragments of MSP-1 were determined by serology and by a functional assay that quantifies invasion inhibition Abs against the MSP-1(19) merozoite ligand (MSP-1(19) IIA). Infants had detectable IgG and IgM Abs to MSP-1(42) and MSP-1(19) at 6 mo of age with no significant change by age 24-30 mo. In contrast, MSP-1(19) IIA levels increased from 6 to 24-30 mo of age (16-29%, p < 0.01). Infants with evidence of prenatal exposure to malaria (defined by P. falciparum detection in maternal, placental, and/or cord blood compartments) and T cell sensitization at birth (defined by cord blood lymphocyte cytokine responses to MSP-1) showed the greatest age-related increase in MSP-1(19) IIA compared with infants with prenatal exposure to malaria but who lacked detectable T cell MSP-1 sensitization. These data suggest that fetal sensitization or tolerance to MSP-1, associated with maternal malaria infection during pregnancy, affects the development of functional Ab responses to MSP-1 during infancy.
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Affiliation(s)
- Arlene Dent
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, OH 44106, USA
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Mahabir E, Bulian D, Needham J, Mayer A, Mateusen B, Van Soom A, Nauwynck H, Schmidt J. Transmission of mouse minute virus (MMV) but not mouse hepatitis virus (MHV) following embryo transfer with experimentally exposed in vivo-derived embryos. Biol Reprod 2006; 76:189-97. [PMID: 17021342 PMCID: PMC7109837 DOI: 10.1095/biolreprod.106.056135] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The present study investigated the presence and location of fluorescent microspheres having the size of mouse hepatitis virus (MHV) and of mouse minute virus (MMV) in the zona pellucida (ZP) of in vivo-produced murine embryos, the transmission of these viruses by embryos during embryo transfer, and the time of seroconversion of recipients and pups. To this end, fertilized oocytes and morulae were exposed to different concentrations of MMVp for 16 h, while 2-cell embryos and blastocysts were coincubated for 1 h. In addition, morulae were exposed to MHV-A59 for 16 h. One group of embryos was washed, and the remaining embryos remained unwashed before embryo transfer. Serological analyses were performed by means of ELISA to detect antibodies to MHV or MMV in recipients and in progeny on Days 14, 21, 28, 42, and 63 and on Days 42, 63, 84, 112, 133, and 154, respectively, after embryo transfer. Coincubation with a minimum of 105/ml of fluorescent microspheres showed that particles with a diameter of 20 nm but not 100 nm crossed the ZP of murine blastocysts. Washing generally led to a 10-fold to 100-fold reduction of MMVp. Washed MMV-exposed but not MHV-exposed embryos led to the production of antibodies independent of embryonic stage and time of virus exposure. Recipients receiving embryos exposed to a minimum of 107 mean tissue culture infective dose (TCID50)/ml of MHV-A59 and 102 TCID50/ml of MMVp seroconverted by Day 42 after embryo transfer. The results indicate that MMV but not MHV can be transmitted to recipients even after washing embryos 10 times before embryo transfer.
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Affiliation(s)
- Esther Mahabir
- Department of Comparative Medicine, GSF-National Research Center for Environment and Health, D-85764 Neuherberg, Germany.
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Renegar KB. Passive Immunization: Systemic and Mucosal. Mucosal Immunol 2005. [PMCID: PMC7173575 DOI: 10.1016/b978-012491543-5/50050-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mahabir E, Jacobsen K, Brielmeier M, Peters D, Needham J, Schmidt J. Mouse antibody production test: can we do without it? J Virol Methods 2004; 120:239-45. [PMID: 15288967 DOI: 10.1016/j.jviromet.2004.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Revised: 05/13/2004] [Accepted: 05/18/2004] [Indexed: 11/19/2022]
Abstract
Introduction of microbiologically contaminated materials into mice can cause infections of the recipients and jeopardize experimental protocols. As such, the methods used to screen biological materials should be sensitive, reliable and suitable for routine diagnostic work. In this report, the sensitivity of the viral plaque assay, mouse antibody production test and polymerase chain reaction (PCR) for detection of MHV-A59 and MMVp, two of the most prevalent pathogenic viruses in experimental mouse facilities, was compared. Analysis of serial tenfold dilutions of virus stocks revealed that the sensitivity of the mouse antibody production test on day 28 (10(-10) dilution) was at least 10 times higher than that of the viral plaque assay (10(-9) dilution) and 10(4) times more than that of the RT-PCR (10(-6) dilution) for detection of MHV-A59. For detection of MMVp, the PCR (10(-10) dilution) proved to be 10(6) times more sensitive than the viral plaque assay (10(-4) dilution) and the mouse antibody production test on day 28 (10(-4) dilution) which were equally sensitive. Based on the present study, it was shown that the method for diagnosis of viruses in biological materials should be employed only after the sensitivity has been determined for the viruses of interest implying that the most sensitive method needs to be determined independently for each virus.
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Affiliation(s)
- E Mahabir
- Department of Comparative Medicine, GSF--National Research Centre for Environment and Health, D-85764 Neuherberg, Germany.
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20
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Weisbroth SH, Peters R, Riley LK, Shek W. Microbiological Assessment of Laboratory Rats and Mice. ILAR J 2001; 39:272-290. [PMID: 11528088 DOI: 10.1093/ilar.39.4.272] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Tizard I. The protective properties of milk and colostrum in non-human species. ADVANCES IN NUTRITIONAL RESEARCH 2001; 10:139-66. [PMID: 11795038 DOI: 10.1007/978-1-4615-0661-4_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
Affiliation(s)
- I Tizard
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas 77843, USA
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22
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Gustafsson E, Blomqvist G, Bellman A, Holmdahl R, Mattsson A, Mattsson R. Maternal antibodies protect immunoglobulin deficient neonatal mice from mouse hepatitis virus (MHV)-associated wasting syndrome. Am J Reprod Immunol 1996; 36:33-9. [PMID: 8831899 PMCID: PMC7159460 DOI: 10.1111/j.1600-0897.1996.tb00136.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
PROBLEM Neonatal mice nursed by dams lacking immunoglobulins (Igs) may often suffer from lethal runting if raised under conventional conditions. The present study was performed in order to clarify a) the cause of the wasting syndrome and b) the protective role of antigen-specific milk antibodies. METHOD Ig-deficient mouse embryos in a conventional environment were embryo-transferred to specified pathogen free (SPF) dams. Neonatal growth, mortality, and health status of mice from both environments was recorded. Suspected presence of mouse hepatitis virus (MHV) was tested by RT-PCR. Protective effects on neonatal mortality of milk containing different titers of anti-MHV antibodies were investigated in cross-fostering experiments. RESULTS The SPF colony of Ig-deficient mice exhibited no breeding problems, whereas Ig-deficient neonates in the conventional environment suffered from lethal wasting syndrome. Serological screening of the mice kept in the two environments revealed that mice in the conventional room had high titers of antibodies against mouse hepatitis virus. Presence of MHV in runting neonates was confirmed by pathological examinations and RT-nested-PCR using MHV genome specific primers. Milk containing high titers of anti-MHV antibodies, when provided for 8 days or more, completely prevented Ig-deficient neonates from developing wasting syndrome in the conventional environment. CONCLUSION These findings show that the neonatal wasting syndrome is associated with the presence of MHV and that neonates are efficiently protected by MHV-specific antibodies in the milk.
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Affiliation(s)
- E Gustafsson
- Department of Animal Development and Genetics, Uppsala University, Sweden
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Abstract
Maternally-derived antibody to enterotropic mouse hepatitis virus (MHV) strain Y was transferred to pups by both intrauterine (IgG) and lactogenic (IgA and IgG) routes. Antibody present in the gastric whey of pups suckling immune dams dropped to undetectable levels by weaning age (21 days post partum). MHV-specific IgG was found in the serum of passively immune pups up to 10 weeks of age. Immune dams transferred equal levels of antibody to 3 consecutive litters of pups, without evidence of decline. Immunoblots showed that IgA and IgG in whey and serum were directed against nucleoprotein N and glycoprotein S. MHV-specific IgM was not detected in any sample.
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Affiliation(s)
- F R Homberger
- Section of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut
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25
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Abstract
Maternally-derived passive immunity of infant mice to challenge infection with enterotropic coronavirus mouse hepatitis virus strain Y (MHV-Y) was studied. Pups born to both naive and immune dams, but nursed by naive foster dams, were susceptible to infection, while naive or immune pups nursed by immune foster dams were protected. The MHV infectious dose was identical among naive pups inoculated at 1, 2, 3, or 4 weeks of age. Pups nursing immune dams resisted infection when inoculated at 1, 2, or 3 weeks of age. Three week old pups were protected only if they were allowed access to their immune dams. Pups born to MHV immune dams 4 in consecutive litters acquired equal MHV IgG titers in serum and whey and were all protected against challenge infection. Only pups actively ingesting immune whey at the time of or within two hours after virus inoculation were effectively protected. Pups born to dams immunized by oral inoculation with live MHV acquired both MHV-specific IgA and IgG in their whey, while pups born to dams immunized with killed virus acquired only IgG. Both IgA and IgG, but not IgG alone, were required for complete protection.
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Affiliation(s)
- F R Homberger
- Section of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut
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