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Lara-Escandell M, Gamberini C, Juliana NC, Al-Nasiry S, Morré SA, Ambrosino E. The association between non-viral sexually transmitted infections and pregnancy outcome in Latin America and the Caribbean: A systematic review. Heliyon 2024; 10:e23338. [PMID: 38187347 PMCID: PMC10767377 DOI: 10.1016/j.heliyon.2023.e23338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 01/09/2024] Open
Abstract
Introduction Non-viral sexually transmitted infections are known to be associated with adverse pregnancy outcomes. For these pathogens, standard antenatal screening is not broadly performed in Latin America and the Caribbean. The aim of this study was to comprehensively review the association of non-viral sexually transmitted infections and neonatal outcomes among pregnant women in the region. Methods Four databases (PubMed, Embase, SciELO and LILACS) were examined to identify eligible studies published up to September 2022. English or Spanish cross-sectional, case-control and cohort studies assessing the association of non-viral sexually transmitted infections and adverse pregnancy outcomes were evaluated. Articles were firstly screened by means of title and abstract. Potential articles were fully read and assessed for inclusion according to the eligibility criteria. Snowballing search was performed by screening of bibliographies of the chosen potentially relevant papers. Risk of bias within studies was assessed using the Joanna Briggs Institute reviewer's manual. Results A selection of 10 out of 9772 search records from five Latin America and the Caribbean countries were included. Six studies associated Treponema pallidum infection with preterm birth (1/6), history of previous spontaneous abortion (2/6), fetal and infant death (1/6), low birth weight (1/6) and funisitis of the umbilical cord (1/6). Three studies associated Chlamydia trachomatis infection with preterm birth (2/3), ectopic pregnancy (1/3) and respiratory symptoms on the newborn (1/3). One study associated Mycoplasma genitalium infection with preterm birth. Conclusion This review provides evidence on the association of non-viral sexually transmitted infections with adverse pregnancy outcomes. Further investigation is needed to establish more associations between non-viral sexually transmitted infections and pregnancy outcome, especially for Mycoplasma genitalium, Trichomonas vaginalis and Neisseria gonorrhoeae. Overall, this review calls for more research for public health interventions to promote screening of non-viral sexually transmitted infections during pregnancy, among high-risk population groups of pregnant women living in the region.
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Affiliation(s)
- Maria Lara-Escandell
- Institute for Public Health Genomics (IPHG), Department of Genetics and Cell Biology, Research School GROW for Oncology and Reproduction, Faculty of Health, Medicine & Life Sciences, University of Maastricht, 6229 ER Maastricht, the Netherlands
| | - Carlotta Gamberini
- Institute for Public Health Genomics (IPHG), Department of Genetics and Cell Biology, Research School GROW for Oncology and Reproduction, Faculty of Health, Medicine & Life Sciences, University of Maastricht, 6229 ER Maastricht, the Netherlands
| | - Naomi C.A. Juliana
- Institute for Public Health Genomics (IPHG), Department of Genetics and Cell Biology, Research School GROW for Oncology and Reproduction, Faculty of Health, Medicine & Life Sciences, University of Maastricht, 6229 ER Maastricht, the Netherlands
| | - Salwan Al-Nasiry
- Institute for Public Health Genomics (IPHG), Department of Genetics and Cell Biology, Research School GROW for Oncology and Reproduction, Faculty of Health, Medicine & Life Sciences, University of Maastricht, 6229 ER Maastricht, the Netherlands
- Department of Obstetrics and Gynecology, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Servaas A. Morré
- Institute for Public Health Genomics (IPHG), Department of Genetics and Cell Biology, Research School GROW for Oncology and Reproduction, Faculty of Health, Medicine & Life Sciences, University of Maastricht, 6229 ER Maastricht, the Netherlands
- Department of Molecular and Cellular Engineering, Jacob Institute of Biotechnology and Bioengineering, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad 211007, UP, India
- Dutch Chlamydia Trachomatis Reference Laboratory on Behalf of the Epidemiology and Surveillance Unit, Centre for Infectious Disease Control, National Institute for Public Health and the Environment, 3721 MA Bilthoven, the Netherlands
| | - Elena Ambrosino
- Institute for Public Health Genomics (IPHG), Department of Genetics and Cell Biology, Research School GROW for Oncology and Reproduction, Faculty of Health, Medicine & Life Sciences, University of Maastricht, 6229 ER Maastricht, the Netherlands
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Yokoi K, Minamiguchi S, Honda Y, Kobayashi M, Kobayashi S, Nishikomori R. Necrotizing Funisitis as an Intrauterine manifestation of Cryopyrin-Associated Periodic Syndrome: a case report and review of the literature. Pediatr Rheumatol Online J 2021; 19:77. [PMID: 34059097 PMCID: PMC8165790 DOI: 10.1186/s12969-021-00578-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 05/25/2021] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Cryopyrin-associated periodic syndrome (CAPS) is a life-long, autoinflammatory disease associated with a gain-of-function mutation in the nucleotide-binding domain, leucine-rich repeat family, pyrin domain containing 3 (NLRP3) gene, which result in uncontrolled production of IL-1β and chronic inflammation. Chronic infantile neurologic cutaneous and articular (CINCA) syndrome/neonatal-Onset multisystem inflammatory disease (NOMID) is the most severe form of CAPS. Although the first symptoms may be presented at birth, there are few reports on the involvement of the placenta and umbilical cord in the disease. Therefore, we present herein a preterm case of CINCA/NOMID syndrome and confirms intrauterine-onset inflammation with conclusive evidence by using fetal and placental histopathological examination. CASE PRESENTATION The female patient was born at 33weeks of gestation by emergency caesarean section and weighted at 1,514 g. The most common manifestations of CINCA/NOMID syndrome including recurrent fever, urticarial rash, and ventriculomegaly due to aseptic meningitis were presented. She also exhibited atypical symptoms such as severe hepatosplenomegaly with cholestasis. The genetic analysis of NLRP3 revealed a heterozygous c.1698 C > G (p.Phe566Leu) mutation, and she was diagnosed with CINCA/NOMID syndrome. Further, a histopathological examination revealed necrotizing funisitis, mainly inflammation of the umbilical artery, along with focal neutrophilic and lymphocytic villitis. CONCLUSIONS The necrotizing funisitis, which only involved the artery, was an unusual observation for chorioamnionitis. These evidences suggest that foetal inflammation, probably due to overproduction of IL-1β, caused tissue damage in utero, and the first symptom of a newborn with CINCA/NOMID.
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Affiliation(s)
- Kyoko Yokoi
- Department of Pediatrics, Komaki City Hospital, 1-20, Jobushi, Aichi, 485-8520, Komaki, Japan. .,Department of Pediatrics, Nagoya West Medical Center, Nagoya, Japan.
| | - Sachiko Minamiguchi
- grid.258799.80000 0004 0372 2033Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yoshitaka Honda
- grid.258799.80000 0004 0372 2033Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Mizuho Kobayashi
- Department of Diagnostic Pathology, Nagoya West Medical Center, Nagoya, Japan
| | - Satoru Kobayashi
- Department of Pediatrics, Nagoya West Medical Center, Nagoya, Japan
| | - Ryuta Nishikomori
- grid.258799.80000 0004 0372 2033Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan ,grid.410781.b0000 0001 0706 0776Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, Japan
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Wang W, Zhang M, Gong L, Wu Q. Necrotizing funisitis and calcification of umbilical vein: case report and review. BMC Pregnancy Childbirth 2021; 21:296. [PMID: 33845786 PMCID: PMC8042875 DOI: 10.1186/s12884-021-03743-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 03/22/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Necrotising funisitis (NF) is a rare, chronic stage of funisitis, a severe inflammation of the umbilical cord and an important risk factor for fetal adverse outcomes. NF is characterized by yellow-white bands running parallel to the umbilical blood vessels. These bands consist of inflammatory cells, necrotic debris, and calcium deposits. Calcification is visible in ultrasonography, which makes it possible to suspect NF when umbilical vascular wall calcification is detected by prenatal ultrasonography. CASE PRESENTATION Ultrasonography revealed calcification of the umbilical venous wall in an expectant 31-year-old woman who was gravida 1, para 0. The woman required emergency cesarean section because of fetal distress and suspected umbilical cord torsion at 31 weeks gestation. The root of the umbilical cord was quite fragile and broke during the operation. The pathological results on the placenta showed histologic chorioamnionitis and NF. The infant was diagnosed to have neonatal sepsis and acidosis after delivery but was discharged without severe complications after a one-month hospitalization that included antibiotic and supportive therapy. CONCLUSION NF is a rare and severe inflammation of the umbilical cord. Umbilical vascular wall calcification discovered in prenatal ultrasonography is diagnostically helpful.
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Affiliation(s)
- Wendi Wang
- Department of Ultrasound, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 251 Yaojiayuan Road, Beijing, 100026, China
| | - Miao Zhang
- Department of Ultrasound, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Liyun Gong
- Department of Obstetrics and Gynecology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Qingqing Wu
- Department of Ultrasound, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, 251 Yaojiayuan Road, Beijing, 100026, China.
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Abstract
Miscarriage is a frequent complication of human pregnancy: ∼50% to 70% of spontaneous conceptions are lost prior to the second trimester. Etiology of miscarriage includes genetic abnormalities, infections, immunological and implantation disorders, uterine and endocrine abnormalities, and lifestyle factors. Given such variability, knowledge regarding causes, pathophysiological mechanisms, and morphologies of primary early pregnancy loss has significant gaps; often, pregnancy losses remain unexplained. Pathologic evaluation of miscarriage tissue is an untapped source of knowledge. Although miscarriage specimens comprise a significant part of pathologists' workload, information reported from these specimens is typically of minimal clinical utility for delineating etiology or predicting recurrence risk. Standardized terminology is available, though not universally used. We reintroduce the terminology and review new information about early pregnancy losses and their morphologies. Current clinical terminology is inconsistent, hampering research progress. This review is a resource for diagnostic pathologists studying this complex problem.
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Affiliation(s)
- M Halit Pinar
- a Perinatal and Pediatric Pathology , Warren Alpert Medical School, Brown University , Providence , Rhode Island , USA
| | - Karen Gibbins
- b Division of Maternal and Fetal Medicine , University of Utah Hospital, Obstetrics and Gynecology , Salt Lake City , Utah , USA
| | - Mai He
- c Pathology and Laboratory Medicine, Division of Pediatric Pathology , Washington University in Saint Louis School of Medicine , Saint Louis , Missouri , USA
| | - Stefan Kostadinov
- d Pathology and Laboratory Medicine, Division of Perinatal and Pediatric Pathology, Women and Infants Hospital , Brown University Warren Alpert Medical School , Providence , Rhode Island , USA
| | - Robert Silver
- e Division of Maternal Fetal Medicine , University of Utah Hospital, Obstetrics and Gynecology , Salt Lake City , Utah , USA
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Sebastian M, Giles R, Roberts J, Poonacha K, Harrison L, Donahue J, Benirschke K. Funisitis Associated with Leptospiral Abortion in an Equine Placenta. Vet Pathol 2016; 42:659-62. [PMID: 16145212 DOI: 10.1354/vp.42-5-659] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Funisitis, inflammation of the umbilical cord, is well recognized in human placentas. This report describes a case of funisitis associated with leptospiral infection in the placenta of a Thoroughbred foal born prematurely. The umbilical cord had diffuse superficial yellow discoloration along its entire length. Microscopic evaluation showed an exudate of neutrophils admixed with fibrin on the surface. Warthin-Starry staining showed spirochetes in the Wharton's jelly of the umbilical cord. A locally extensive, severe placentitis not involving the star and allantoic cystic hyperplasia were the other lesions observed in the allantochorion. Leptospira funisitis is similar to the funisitis of congenital syphilis in humans, although there are some major microscopic differences. in Leptospira funisitis, lesions were limited to the cord surface, whereas in lesions in human umbilical cords with Treponema pallidum infection, the changes are observed mostly around the vessels and in the Wharton's jelly.
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Affiliation(s)
- M Sebastian
- Livestock Disease Diagnostic Center, University of Kentucky, Lexington, USA.
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Akahira-Azuma M, Kubota M, Hosokawa S, Kaneshige M, Yasuda N, Sato N, Matsushita T. Republication: Two Premature Neonates of Congenital Syphilis with Severe Clinical Manifestations. Trop Med Health 2015; 43:165-70. [PMID: 26543391 PMCID: PMC4593778 DOI: 10.2149/tmh.2015-11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/12/2015] [Indexed: 11/24/2022] Open
Abstract
Congenital syphilis (CS) is a public health burden in both developing and developed countries. We report two cases of CS in premature neonates with severe clinical manifestations; Patient 1 (gestational age 31 weeks, birth weight 1423 g) had disseminated idiopathic coagulation (DIC) while Patient 2 (gestational age 34 weeks and 6 days, birth weight 2299 g) had refractory syphilitic meningitis. Their mothers were single and had neither received antenatal care nor undergone syphilis screening. Both neonates were delivered via an emergency cesarean section and had birth asphyxia and transient tachypnea of newborn. Physical examination revealed massive hepatosplenomegaly. Laboratory testing of maternal and neonatal blood showed increased rapid plasma reagin (RPR) titer and positive Treponema pallidum hemagglutination assay. Diagnosis of CS was further supported by a positive IgM fluorescent treponemal antibody absorption test and large amounts of T. pallidum spirochetes detected in the placenta. Each neonate was initially treated with ampicillin and cefotaxime for early bacterial sepsis/meningitis that coexisted with CS. Patient 1 received fresh frozen plasma and antithrombin III to treat DIC. Patient 2 experienced a relapse of CS during initial antibiotic treatment, necessitating parenteral penicillin G. Treatment was effective in both neonates, as shown by reductions in RPR. Monitoring of growth and neurological development through to age 4 showed no evidence of apparent delay or complications. Without adequate antenatal care and maternal screening tests for infection, CS is difficult for non-specialists to diagnose at birth, because the clinical manifestations are similar to those of neonatal sepsis and meningitis. Ampicillin was insufficient for treating CS and penicillin G was necessary.
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Affiliation(s)
- Moe Akahira-Azuma
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Mai Kubota
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Shinichi Hosokawa
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Masao Kaneshige
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Noriko Yasuda
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Noriko Sato
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Takeji Matsushita
- National Center for Global Health and Medicine , 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
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Schuetz AN, Guarner J, Packard MM, Zaki SR, Shehata BM, Opreas-Ilies G. Infectious disease immunohistochemistry in placentas from HIV-positive and HIV-negative patients. Pediatr Dev Pathol 2011; 14:180-8. [PMID: 21054157 DOI: 10.2350/10-04-0817-oa.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Studies comparing placental pathology between human immunodeficiency virus (HIV)-positive and HIV-negative patients have shown conflicting results. In addition, few studies have evaluated the infectious etiology of placental inflammation in HIV-positive patients. We examined a cohort of placentas from 73 HIV-positive and 41 HIV-negative patients to gain a better understanding of the spectrum of placental inflammatory lesions. Bacterial and viral immunohistochemistry (IHC) was run on a subset of placentas (12 HIV-positive and 7 HIV-negative) with the greatest amount of inflammation. Although few histologic differences were seen between the HIV-positive and HIV-negative groups, chorioamnionitis was of a higher stage in the HIV-positive placentas. An infectious agent was found by IHC in 3 of 7 HIV-negative patients (2 Neisseria spp. and 1 group B Streptococcus ). One HIV-positive placenta showed gram-positive cocci on fetal membranes; organisms were not detected by IHC. In 2 patients, the etiologic agent was not suspected prior to IHC. This study identified that acute inflammation is less common in placentas from HIV-positive patients, compared with HIV-negative patients. However, when severe inflammation is present, infectious organisms may be identified by IHC, providing a more specific diagnosis and offering a beneficial impact in maternal and fetal management.
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Affiliation(s)
- Audrey N Schuetz
- Department of Pathology and Laboratory Medicine, New York-Presbyterian Hospital, New York, NY, USA.
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Kakogawa J, Sadatsuki M, Masuya N, Gomibuchi H, Minoura S, Hoshimoto K. Prolonged fetal bradycardia as the presenting clinical sign in congenital syphilis complicated by necrotizing funisitis: a case report. ISRN Obstet Gynecol 2011; 2011:320246. [PMID: 21766037 PMCID: PMC3135060 DOI: 10.5402/2011/320246] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 03/16/2011] [Indexed: 11/23/2022]
Abstract
Syphilis remains a serious cause of neonatal morbidity and mortality worldwide. In this paper, we describe a case of congenital syphilis that was fully supported by abnormal fetal heart rate patterns and placental histopathological evidence. A 24-year-old para 4 woman, who did not attend antenatal care, was admitted to our hospital with a complaint of abdominal discomfort at an estimated 31-week gestation. Fetal heart rate monitoring showed prolonged bradycardia. A neonate weighting 1,423 g with severe birth asphyxia was immediately delivered by cesarean section. Following delivery, the mother and the neonate were diagnosed with syphilis. Histopathological examination confirmed severe chorioamnionitis and necrotizing funisitis with numerous Treponema pallidum. Conclusions. Challenges in establishing the diagnosis of necrotizing funisitis are essential for optimal management of a fetus with a systemic inflammatory response in utero.
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Affiliation(s)
- Jun Kakogawa
- Department of Obstetrics and Gynecology, National Center for Global Health and Medicine, 1-21-1, Toyama, Shinjuku-ku, Tokyo, 162-8655, Japan
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Abstract
A wide spectrum of adrenal gland pathology is seen during bacterial infections. Hemorrhage is particularly associated with meningococcemia, while abscesses have been described with several neonatal infections. We studied adrenal gland histopathology of 65 patients with bacterial infections documented in a variety of tissues by using immunohistochemistry. The infections diagnosed included Neisseria meningitidies, group A streptococcus, Rickettsia rickettsii, Streptococcus pneumoniae, Staphylococcus aureus, Ehrlichia sp., Bacillus anthracis, Leptospira sp., Clostridium sp., Klebsiella sp., Legionella sp., Yersinia pestis, and Treponema pallidum. Bacteria were detected in the adrenal of 40 (61%) cases. Adrenal hemorrhage was present in 39 (60%) cases. Bacteria or bacterial antigens were observed in 31 (79%) of the cases with adrenal hemorrhage including 14 with N. meningitidis, four with R. rickettsii, four with S. pneumoniae, three with group A streptococcus, two with S. aureus, two with B. anthracis, one with T. pallidum, and one with Legionella sp. Bacterial antigens were observed in nine of 26 non-hemorrhagic adrenal glands that showed inflammatory foci (four cases), edema (two cases), congestion (two cases), or necrosis (one case). Hemorrhage is the most frequent adrenal gland pathology observed in fatal bacterial infections. Bacteria and bacterial antigens are frequently seen in adrenal glands with hemorrhage and may play a pathogenic role. Although N. meningitidis is the most frequent bacteria associated with adrenal gland pathology, a broad collection of bacteria can also cause adrenal lesions.
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Affiliation(s)
- Jeannette Guarner
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.
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Franco-Paredes C, Guarner J, Mehrabi D, McCall C, del Rio C. Clinical and pathological recognition of leprosy. Am J Med 2003; 114:246-7. [PMID: 12637144 DOI: 10.1016/s0002-9343(02)01480-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zitterkopf NL, Haven TR, Huela M, Bradley DS, Cafruny WA. Transplacental lactate dehydrogenase-elevating virus (LDV) transmission: immune inhibition of umbilical cord infection, and correlation of fetal virus susceptibility with development of F4/80 antigen expression. Placenta 2002; 23:438-46. [PMID: 12061860 DOI: 10.1053/plac.2002.0829] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Maternal-to-fetal transmission of the murine lactate dehydrogenase-elevating virus (LDV) has been previously shown to be regulated by maternal immunity as well as gestational age. For the present study, the role of maternal immunity in placental and umbilical cord virus protection was studied, and virus targeting of umbilical cord and fetal macrophages was correlated with expression of the F4/80 macrophage phenotypic marker. The results showed that LDV-infected macrophages appeared in umbilical cord by 24 h post-infection of pregnant mice, and some LDV-infected macrophages displayed the F4/80 phenotype. This potential reservoir of virus for the fetus was inhibited by passive immunization of pregnant mice with IgG anti-LDV antibodies, which rapidly concentrated in the placenta and umbilical cord. Probing of umbilical cord cells with antibodies directed at MHC genetic markers demonstrated the presence of both maternal and fetal cells in umbilical cords. A strong developmental correlation was observed between fetal F4/80 expression and LDV susceptibility, at about 13.6 days of gestation. These results demonstrate immune suppression of free and cell-associated virus in umbilical cord, thus defining a potentially important mechanism for immune protection of the fetus from transplacental virus infection. The results also clarify the developmental basis for fetal susceptibility to LDV infection.
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MESH Headings
- Animals
- Animals, Outbred Strains
- Antibodies, Viral/biosynthesis
- Antibodies, Viral/immunology
- Antigens, Differentiation/biosynthesis
- Antigens, Differentiation/immunology
- Arterivirus Infections/immunology
- Arterivirus Infections/transmission
- Disease Susceptibility/immunology
- Disease Susceptibility/virology
- Female
- Fetal Blood/immunology
- Fetal Blood/virology
- Fetal Diseases/immunology
- Fetal Diseases/virology
- Immunization, Passive
- Infectious Disease Transmission, Vertical
- Lactate dehydrogenase-elevating virus/immunology
- Lactate dehydrogenase-elevating virus/pathogenicity
- Lactate dehydrogenase-elevating virus/physiology
- Macrophages, Peritoneal/immunology
- Macrophages, Peritoneal/virology
- Maternal-Fetal Exchange/immunology
- Mice
- Mice, Inbred ICR
- Pregnancy
- Pregnancy Complications, Infectious/immunology
- Pregnancy Complications, Infectious/virology
- Viremia/immunology
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Affiliation(s)
- N L Zitterkopf
- Department of Basic Biomedical Sciences, University of South Dakota School of Medicine, 414 E. Clark St., Vermillion, SD 57069, USA
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