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1.
Open Access Macedonian Journal of Medical Sciences ; 11(B):293-298, 2023.
Article in English | EMBASE | ID: covidwho-20245045

ABSTRACT

BACKGROUND: Pregnant women are vulnerable against COVID-19 infection due to physiological and immunological changes. COVID-19 in pregnancy affects fetal well-being with a potential for vertical infection. AIM: This study aims to determine the incidence of vertical infection and anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodies in infants born to mothers with positive COVID-19 infection. MATERIALS AND METHODS: Amniotic fluid, swabs of the newborn's nasopharynx and oropharynx, and swabs of the placenta were examined using reverse transcription polymerase chain reaction (RT-PCR) for SARS-CoV-2. Serological examination was performed by Electro-Chemiluminescence Immunoassay on infant's blood. RESULT(S): Four of 33 pregnant women gave birth to infants positive SARS-CoV-2 infection. RT-PCR examination of all amniotic fluid and placental swabs was negative for SARS-CoV-2. Four of 33 infants (12.1%) showed negative polymerase chain reaction (PCR) results but positive SARS-CoV-2 antibodies, another 4 newborns (12.1%) showed positive PCR results, but no SARS-CoV-2 antibodies detected. The remaining 25 babies (75.8%) showed both negative PCR and serologic results. CONCLUSION(S): No evidence of vertical transmission found in this study.Copyright © 2023 Cut Meurah Yeni, Zinatul Hayati, Sarjani M. Ali, Hasanuddin Hasanuddin, Rusnaidi Rusnaidi, Cut Rika Maharani.

2.
Acta Clinica Croatica ; 61(4):681-691, 2022.
Article in English | EMBASE | ID: covidwho-20241447

ABSTRACT

Ever since the beginning of COVID-19 pandemic, uncertainty regarding clinical presentation and differences among various subpopulations exist. With more than 209,870,000 confirmed cases and more than 4,400,000 deaths worldwide, we are facing the new era of health crisis which will undoubtedly impair global health, economic and social circumstances. In the past year, numerous genetic mutations which code SARS-CoV-2 proteins led to the occurrence of new viral strains, with higher transmission rates. Apart from the implementation of vaccination, the effect of SARS-CoV-2 on pregnancy outcome and maternal fetal transmission remains an important concern. Although neonates diagnosed with COVID-19 were mostly asymptomatic or presented with mild disease, the effect on early pregnancy is yet to be evident. While positive finding of SARS-CoV-2 RNA in some samples such as amniotic fluid, placental tissue, cord blood and breast milk exists, additional research should confirm its association with transplacental transmission.Copyright © 2022, Dr. Mladen Stojanovic University Hospital. All rights reserved.

3.
Cytotherapy ; 25(6 Supplement):S102-S103, 2023.
Article in English | EMBASE | ID: covidwho-20234779

ABSTRACT

Background & Aim: Amniotic fluid (AF)-derived EVs are currently under investigation for use as anti-inflammatory therapeutics in COVID-19 and COVID-19 long haulers. The dysregulation of the immune response induced by SARS-COV-2 is a key driver of both acute COVID-19 induced lung injury and long term COVID-19 sequela. There is a clear need to identify therapeutics that suppress excessive inflammation and reduce immune cell exhaustion to improve patient short term and long-term outcomes. Amniotic fluid (AF)- derived extracellular vesicles (EVs) have previously been shown to deliver anti-inflammatory and immune-modulatory signals to diverse cellular targets. We aimed to test if AF-EVs carry immune-suppressive molecules and can suppress T-cell immune activation and exhaustion in vitro. Methods, Results & Conclusion(s): The AF-EV biologic tested was derived from AF collected from consenting donors during planned, fullterm cesarean sections. AF was centrifuged and filtered to remove cellular debris and create a product containing AF-EVs and soluble extracellular components. Fluorescent EXODOT analysis was performed to demonstrate the presence of EV markers CD9, CD81, ALIX, and immune suppressive molecule PD-L1. T-cell activation/exhaustion was induced in vitro by treating human peripheral blood mononuclear cells with activation agent PHA for 3 days with the addition of AF-EVs or saline control. Immune activation/exhaustion was measured by flow cytometry to determine the expression of PD-1 on CD3+ T-cells. The AF-EV biologic was characterized to contain EVs with positive expression of CD9, CD81, ALIX, and PL-L1. T-cell activation/exhaustion was upregulated in response to PHA and was significantly reduced by 8% in AF-EV treated T-cells compared to saline control (77.7% vs 85.7%, respectively P<0.05). These findings demonstrate that AF-EVs do express PD-L1, a surface marker that has previously been demonstrated to contribute to exosome-mediated immunosuppression. Furthermore, we confirmed in vitro that AF-EVs suppress T-cell activation/ exhaustion in the presence of a T-cell activation agent. COVID-19 long haulers have been described to have upregulated and pro-longed immune activation and T-cell exhaustion, marked by an increase in PD1+ T-cells. Therefore, this finding serves as a starting point for the development of a potential mechanism of action that may describe AF-EV's therapeutic effect in COVID-19 long hauler patients.Copyright © 2023 International Society for Cell & Gene Therapy

4.
Journal of Investigative Medicine ; 71(1):510, 2023.
Article in English | EMBASE | ID: covidwho-2319804

ABSTRACT

Case Report: Since the beginning of the Coronavirus Disease 2019 (COVID-19) pandemic, there has been much work to understand the negative effects of SARS-CoV-2 on tissues expressing the Angiotensin Converting Enzyme-2 (ACE2) receptor, including the placenta. However, there is limited information regarding placental pathology findings in mothers with COVID-19 and the effects of SARS-CoV-2 on the placenta. The available research reports effects on the fetus ranging from minimal to intrauterine fetal demise. Case Description: A 4680g baby boy was born at 38+1 weeks of gestation to 36y old G4P1021 female via repeat cesarian section. The pregnancy was complicated by advanced maternal age, chronic hypertension with superimposed pre-eclampsia with severe features, BMI of 80, and SARS-CoV-2 infection. The mother had mild COVID-19 symptoms and did not require hospitalization or oxygen support. Prenatal ultrasounds were limited due to body habitus. At the time of delivery, there was clear amniotic fluid. Upon delivery the infant was cyanotic and limp and was brought to the warmer immediately. Non-invasive positive pressure ventilation was initiated at 5 minutes of life with improvement in infant color and oxygen saturation. He was then admitted to the Neonatal Intensive Care Unit (NICU). APGARs were 2, 3, 5, and 7 at 1, 5, 10, and 15 minutes respectively. Cord gases showed severe metabolic acidosis. The patient was diagnosed with hypoxic-ischemic encephalopathy (HIE) and therapeutic hypothermia was initiated. Both the NICU and obstetric teams were unable to identify a clear perinatal cause of HIE in this patient. Later, the placenta pathology report revealed a large placenta for estimated gestational age corresponding to the 75th percentile, villous parenchyma with focal chorangiosis and thrombi, with unremarkable fetal membrane and three vessel umbilical cord. The cause of HIE was then thought to be due to the placental thrombi likely caused by SARS-CoV-2 infection. Discussion(s): Fetal vascular malperfusion and fetal vascular thrombus have been noted as a common finding in the placentas of pregnant women who test positive for SARS-CoV-2. There are various causes of HIE, from maternal, placental and fetal factors. This patient had no clinically evident hypoxic event, but information was limited due to the lack of monitoring of the fetus in utero. Given the mother's SARS-CoV-2 infection and the placental pathology findings, it is likely that the cause of this patient's HIE was related to the effects on the placenta from SARS-CoV-2. Conclusion(s): As more information comes to light about the effects of SARS-CoV-2 on the placenta, it is important to consider a maternal SARS-CoV-2 infection during pregnancy as a cause of HIE in a newborn.

5.
European Journal of Molecular and Clinical Medicine ; 7(1):4455-4461, 2020.
Article in English | EMBASE | ID: covidwho-2297424

ABSTRACT

Background: In new pandemic, the probable effects of COVID-19 pneumonia on pregnant woman and their infant is one of new critical challenge for health care. Here we presented clinical symptoms, laboratory findings and outcome of COVID-19 pneumonia in pregnant woman. Method(s): In a case series study, from 15 Feb to 15 June 2020, all women with RT-PCR COVID-19 who referred to two hospitals (Taleghani and Qods Hospital) affiliated to Arak University of Medical Sciences were selected. The epidemiological and demographic variables, laboratory test and outcomes obtained from patient's medical records. Result(s): In this case series, we presented thirteen confirmed COVID-19 pregnant women. Their mean age was 34.6 (S.D.: 5.9) years and the mean gestational age was 32.4 (S.D.: 7.3) weeks. Most of patient didn't show any maternal complication and intrauterine vertical transmission. The large number of pregnant women had normal HRCT and also in terms of laboratory most of the patients had normal laboratory tests. Amniotic fluids, cord blood, the throat swab of neonate in our pregnant woman with delivery were tested for COVID-19 and all of them were negative. Conclusion(s): The COVID-19 mothers and their infant didn't have higher risk for morbidity and mortality and this virus didn't associate with intrauterine vertical transmission.Copyright © 2020 Ubiquity Press. All rights reserved.

6.
Italian Journal of Gynaecology and Obstetrics ; 35(Supplement 1):62, 2023.
Article in English | EMBASE | ID: covidwho-2267729

ABSTRACT

Objective. Thanks to the SARS-CoV-2 vaccination, pregnant women are protected from the complications of COVID-19 infection, but the benefits of this vaccination in preventing morbidity and mortality in the fetus are not yet clear: it is not well understood if and how these antibodies cross the placenta. Indeed antibodies made after a pregnant person has received an mRNA COVID-19 vaccine have been found in amniotic fluid and umbilical cord blood at term and represent a safer method of enhancing neonatal antibody levels than administration of immunoglobulin preparation to the infant. The aim of the study is to test the presence of neutralizing SARS-CoV-2 antibodies and spike antibodies in the amniotic fluid in the second trimester of pregnancy, and then to compare the antibodies level in maternal serum and amniotic fluid to evaluate their correlation. Materials and Methods. This cohort study took place at the Department of Obstetrics and Gynecology of Messina at the AOU Policlinico G. Martino from September 2021 to February 2022;the study consisted of 22 pregnant women who had amniocentesis in the gestational period between 15 weeks plus 6 days and 18 weeks: we analyzed serum and amniotic fluid samples of women who contracted the SARS-CoV-2 infection, or who were vaccinated against the same virus, within one year, or never infected by SARS-CoV-2 or vaccinated against it. During the amniocentesis, all patients underwent a single sample of maternal serum and of amniotic fluid to evaluate SARS-CoV-2 neutralizing antibody and S1 receptor binding domain IgG antibody levels. Inclusion criteria were pregnant women with the need to undergo amniocentesis. Results. 22 pregnant women were enrolled in the study:10 of them were vaccinated with a mRNA COVID-19 vaccine;12 women were not vaccinated, 4 of them had developed COVID-19 infection within one year before the collection and 2 of them developed the infection during pregnancy;the other 6 never developed the infection and have not been vaccinated, enrolled as comparators. Mann-Whitney test showed that vaccinated patients had significantly higher S1 receptor binding domain antibody levels both in amniotic fluid (p < 0.006) and maternal blood (p < 0.005) than not vaccinated women;also SARS-CoV-2 neutralizing antibody levels were higher in pregnant women who developed COVID-19 infection both in amniotic fluid (p < 0.007) and maternal blood (p < 0.004) than not vaccinated women. There was a significantly high correlation between the concentrations of spikes antibody levels in vaccinated pregnant women's serum and amniotic fluid (p = 0.000), and of neutralizing antibody levels in serum and amniotic fluid of women who developed COVID-19 infection (p = 0.000). Conclusions. To the best of our knowledge, the analysis of amniotic fluid and serum showed for the first time that all the vaccinated pregnant women samples had SARS-CoV-2 spikes immunoglobulins both in maternal blood and amniotic fluid. There is a very high correlation between maternal blood and amniotic fluid S1 receptor binding domain antibody levels in vaccinated women: this demonstrates that there is an early transplacental antibody transfer. Also neutralizing antibodies were found in the amniotic fluid of infected pregnant women, with high correlation between concentrations.

7.
Acta Medica Mediterranea ; 39(2):447-452, 2023.
Article in English | EMBASE | ID: covidwho-2287167

ABSTRACT

It was to explore the clinical characteristics of late pregnant women with asymptomatic infection of coronavirus disease 2019 (COVID-19) and the risk of intrauterine vertical transmission and breastfeeding transmission. The clinical data of a late pregnant woman with COVID-19 were retrospectively analyzed. The patient (singleton, cephalic) was admitted to the hospital on April 3, 2022. The patient had a dramatic increase in C-reactive protein after delivery, other blood routine tests were unremarkable, and the result of nucleic acid test was positive. On April 13, 2022, due to oligohydramnios, under measures such as positive pressure headgear and protective clothing in negative pressure operating room, second cesarean section combined with hysterorrhaphy (emergency) was performed to terminate the pregnancy, and the mother and baby were in good condition. Postpartum amniotic fluid, milk, and neonatal nucleic acid tests were negative. Corresponding treatment was given after cesarean section, and the patient was continuously monitored for nucleic acid detection to meet the discharge criteria of the COVID-19 and discharged and isolated. After discharge, the patient was followed up for 1 month. The newborn's spirit, diet, and development were normal. The maternal cesarean section incision recovered well. Patient with COVID-19 in the third trimester has prolonged hospital stays and are difficult to treat. However, the virus was not found in amniotic fluid, breast milk, and newborn, for which COVID-19 does not lead to intrauterine vertical transmission and breastfeeding transmission in the third trimester.Copyright © 2023 by the authors.

8.
Kathmandu University Medical Journal ; 18(2-70 COVID-19 Special Issue):78-82, 2020.
Article in English | EMBASE | ID: covidwho-2228122

ABSTRACT

COVID-19 first time appeared in December 2019 in Wuhan, China. The number of cases increased rapidly in china and outside and the World Health Organization declared a pandemic on 11th March 2020. The pregnant and postpartum women, child, and neonatal populations are vulnerable to this disease due to immunological and physiological changes. This paper analyzed the published evidence for assessing the effect of COVID-19 on neonatal health and health care. Online published literature was searched from PubMed, Google Scholar, and other official webpages using keywords: "coronavirus/COVID-19/new coronavirus 2019"/SARS-CoV-2 and neonatal health/care/outcomes" and reviewed to prepare this article. COVID-19 is the potential to transmit either mother to fetus or mother/caregiver to neonates. However, neonates born from infected mothers did not show significant clinical features. Pharyngeal-swab, amniotic-fluid, cord-blood, and breast-milk test results were not found positive. Health facility-based vaginal/caesarian delivery was considered a low risk of transmission. However, recommended to separate neonates with infected mothers/caregivers and test immediately after birth to avoid the possible transmission. Mothers/caregivers should take routine preventive measures such as washing hands frequently and avoiding contact with infected people. If neonates suffered from the server acute respiratory distress requires intensive care urgently. Despite the possibility of the intrauterine transmission of COVID-19 direct evidence is still lacking so it needs more studies for further confirmation. The International Pediatric Association suggested preventive programs, curative care, vaccination, and telemedicine care as the minimum services and called on its members to address these cares during the pandemic. Copyright © 2020, Kathmandu University. All rights reserved.

9.
Placenta ; 128:134, 2022.
Article in English | EMBASE | ID: covidwho-2182350

ABSTRACT

Objective: Chronic Abruption Oligohydramnios Sequence (CAOS) is known as a disease with a poor perinatal prognosis characterized by placental marginal hematoma and genital bleeding, associated with fetal growth restriction, hemorrhagic amniotic fluid, oligohydramnios and chronic lung disease in the newborn. We reviewed the placental pathology of five cases diagnosed as CAOS without genital bleeding. Method(s): Pregnant women with CAOS without genital bleeding between April 2020 and July 2022 were identified. Five of these cases were clinically suspected as CAOS. Therefore, we evaluate the presence of hemorrhagic amniotic fluid and/or posterior placental hematoma by MRI;one case could not perform MRI because of COVID-19 infection. Placentas were examined histopathological and reviewed for the four Amsterdam classification groups, presence of diffuse chorioamniotic hemosiderosis (DCH), and other special findings. Result(s): The median age of the patients was 31 years and the median number of weeks of delivery was 24 weeks, including 2 cases of artificial abortion, 1 case of vaginal delivery, and 2 cases of cesarean section. The main complaints were FGR in 2 cases, amniotic fluid depletion in 2 cases, and suspected fetal congenital anomaly in 1 case. In histopathologic examination, 4 cases show DCH, 3 cases show maternal vascular marperfusion, and all cases had Acute chorioamnionitis. Conclusion(s): Four of the five patients had DCH, which suggest that the chorion and amnion are exposed to hematoma over a long period of time. This finding provides the basis for a final diagnosis in cases of clinically suspected CAOS. Our cases suggested that CAOS may be established before the appearance of genital hemorrhage. MRI or other tests should be performed aggressively in cases of clinically suspected CAOS without genital hemorrhage, and the patient should be strictly managed. Copyright © 2022

10.
Springer Protocols Handbooks ; : 121-130, 2022.
Article in English | EMBASE | ID: covidwho-2173507

ABSTRACT

Avian infectious bronchitis virus (IBV), a chicken Gammacoronavirus, is a major poultry pathogen, and is probably endemic in all regions with intensive poultry production. Since IBV was first described in 1936, many serotypes and variants of IBV have been isolated worldwide. IBV isolates are capable of infecting a large range of epithelial surfaces of the chicken, involving the respiratory, renal, and reproductive systems;however, the clinical signs are usually not specific for differential diagnoses. Virus isolation is commonly used for diagnosis of IBV infection, which was achieved through passage of clinical materials via the allantoic route of embryos. Currently, more sensitive molecular approaches for the detection of avian pathogens have been developed, including reverse-transcriptase polymerase chain reaction (RT-PCR) and real-time RT-PCR, which are more suitable for use in diagnostic laboratories. In this chapter, we describe a one-step RT-PCR which can be used for detecting most of IBV serotypes in the IBV-infected allantoic fluid and has been used routinely in our laboratories for detection of IBVs. Copyright © Springer Science+Business Media New York 2016.

11.
Journal of Experimental and Clinical Medicine (Turkey) ; 39(2):577-578, 2022.
Article in English | EMBASE | ID: covidwho-2146821

ABSTRACT

The case was a 32-year-old, nulliparous pregnant woman, after in-vitro fertilization (IVF) pregnancy. Her contractions started, and the amniotic fluid membrane ruptured at 38 gestational ages. The patient developed shortness of breath and lower oxygen saturation which started suddenly at the 8th hour after the cesarean section procedure under general anesthesia. Thrombotic conditions that may appear during the postpartum period should be diagnosed early and immediate treatment should be started to resolve the actual cause. Copyright © 2022 Ondokuz Mayis Universitesi. All rights reserved.

12.
Research and Practice in Thrombosis and Haemostasis Conference ; 6(Supplement 1), 2022.
Article in English | EMBASE | ID: covidwho-2128288

ABSTRACT

Background: This pandemic has impacted health and the economy worldwide on an unprecedented scale. It has important systemic effects including the cardiovascular and immune systems. Aim(s): Discuss the links between COVID-19 clinical features and complications and its hematological findings and coagulopathy. This link may shed light on our prognostic view to patients with COVID-19 and will have significant therapeutic implications. One of these important implications is the use of mesenchymal stem cells (MSCs) to treat COVID-19 patients. Method(s): Review done to Autopsy findings support the concept that the pathogenesis of severe COVID-19 involves direct viral-induced injury of multiple organs, including heart and lungs, coupled with the consequences of a procoagulant state with coagulopathy. Mesenchymal stem cells as a potential therapy for COVID-19 INFECTION. Result(s): Mesenchymal stem cells (MSCs) can be isolated from different adult tissues, and neonatal birth-associated tissues, including placenta (PL), umbilical cord (UC), Warton jelly (WJ), amniotic fluid (AF), and cord blood (CB), and then stored for future possible applications. Differentiation potential, powerful immunoregulation, and endogenous repair mechanisms. Support to potential use of MSCs in treating patients came from observations that MSCs have been identified to efficiently cure ALI/ARDS from both infectious and noninfectious causes, mediated primarily by paracrine mechanisms based on the released extracellular vesicles (EVs). The immune-regulation of MSCs depends mainly on modulating activation and effector function of immune cells, suppressing lung-infiltrated cells, and enhancing the resolution of pulmonary edema [35]. Conclusion(s): COVID-19 is associated with distinct hematological changes, rise in serum inflammatory markers, and coagulopathy. Most of these changes were related to the patients' prognosis and mortality, particularly in those with severe disease. There are links between COVID-19 clinical features and complications and its hematological findings and coagulopathy. COVID-19 patients seems to be a promising approach. Further studies are needed to clarify more clinic-pathologic links in COVID-19 that might improve outcomes.

13.
Journal of Clinical and Diagnostic Research ; 16(8):DC53-DC57, 2022.
Article in English | EMBASE | ID: covidwho-2067196

ABSTRACT

Introduction: In the search of effective medicines against Coronavirus Disease-2019 (COVID-19) besides the conventional mode of treatment many medicines belonging to alternative therapeutics claimed to be effective in this disease. In homeopathy-a branch of alternative medicine some medicines are claimed to be effective in COVID-19 after human trials. Aim: To study whether ultradiluted preparation of Phosphorus 6CH (centesimal (C) dilutions, using Hanhemann's (H) dilution method) can protect damaging action of Delta Severe Acute Respiratory Syndrome Corona Virus 2 (SARS-CoV-2) spike protein Receptor Binding Domain (RBD) in Gallus gallus embryo in relation to their gross appearances, histopathological changes and cytokine changes. Materials and Methods: An in-vivo fertilized chick embryo model experimental analysis was carried out at the Genetic Research Laboratory of Heritage Institute of Technology, Kolkata, West Bengal, India. The whole experimental study was done in a time period of November 2021 to January 2022 and the data collected were analysed using statistical software Minitab. About 14 days old Gallus gallus embryonated eggs were inoculated with the antigen along with the vehicle alcohol controls. The Phosphorus 6CH was used to see whether it can prevent or cure the damaging action of the spike protein in the embryo in different experimental sets. results: The notable finding in this experiment is the remarkable elevated expression of Interleukin (IL)-10 gene in the curative, preventive sets as well as in the medicine control sets in comparison to antigen and alcohol control sets. In case of Transforming Growth Factor, (TGF) β1 there was enhanced expression of TGF β1 gene in the alcohol 6C set and antigen set which gets ameliorated with Phosphorus 6CH. The morbid anatomy of the embryo and the histopathological picture of the liver of the embryo also reflected similar findings in these two experimental sets. After statistical analysis it was found that there was significant correlation in between Interferon (IF) γ and IL-10 in these experimental results which appears very important. conclusion: The homeopathic medicine phosphorus 6CH is capable of maintaining cytokine balance in Delta SARS-CoV-2 spike protein RBD induced pathogenecity in Gallus gallus embryo.

14.
Cytotherapy ; 24(5):S96-S97, 2022.
Article in English | EMBASE | ID: covidwho-1996720

ABSTRACT

Background & Aim: Extracellular Vesicles (EVs) isolated from single cell sources such as mesenchymal stem cells and biological fluids such as amniotic fluid have previously been found to have various effects on immune cell functions. Zofin is an acellular biologic derived from amniotic fluid and contains naturally occurring EVs. Zofin is currently under clinical investigation for COVID-19 infection and Post Acute Sequale of COVID-19. Therefore, we aimed to investigate the effects of Zofin on the lymphocyte immune response in an in vitro cell culture model. Methods, Results & Conclusion: Zofin was manufactured from fullterm amniotic fluid collected from healthy, consenting mothers during planned cesarean section. The Zofin used in these experiments contained 1.5x1011 particles/ml as quantified by Nanosight NS300. To study the immune response in vitro, PBMCs were stimulated with 5μg/ml Phytohemagglutinin (PHA) for up to 8 days. PBMCs were labeled before culture with cell trace dye to monitor changes in proliferation. Stimulated PBMCs were treated with either serum-free media (vehicle) or different concentrations of Zofin (10% and 20%). 4 days following PHA stimulation, Zofin suppressed PHA-induced T cell proliferation in a dose-dependent manner. 8 days following PHA stimulation there were higher rates of proliferation, Zofin maintained suppressed proliferation at 20% concentrations. In the same cell culture model, treatment with Zofin attenuated a PHA-induced increase in T cell activation as observed by a reduction in expression of activation markers. Overall, this data demonstrates that Zofin has an effect on the immune response of T cells and suggests amniotic fluid derived EVs could be used as an immunotherapeutic tool

15.
Cytotherapy ; 24(5):S91-S92, 2022.
Article in English | EMBASE | ID: covidwho-1996718

ABSTRACT

Background & Aim: Amniotic fluid (AF)-derived extracellular vesicles (EVs) are currently being studied within clinical trials as a novel therapeutic drug for acute and chronic diseases such as COVID-19, osteoarthritis, and chronic obstructive pulmonary disease (COPD). Recently, AF has been characterized to contain harvestable EVs that reduce cytokine expression and protect from high oxygen tissue injury. However, the reproducibility of EV populations derived from AF samples has yet to be fully explored. Here within, we present results of a fluorescent nanoparticle tracking analysis that characterizes the reproducibility of CD81+ and CD133+ populations of EVs. Methods, Results & Conclusion: AF was collected from consenting adults during planned, full term cesarean sections and then processed via filtration and ultracentrifugation to precipitate the nanoparticle population. Prior to fluorescent analysis, a MACSPlex exosome kit (Miltenyi Biotec) was used to identify potential exosome surface markers. Nine independent samples of AF-derived nanoparticles were used for Zetaview analysis. Each pellet was resuspended in saline and stained with CD133-AF488 and CD81-DyLight55 antibodies. Fluorescent nanoparticle tracking analysis was completed using the Zetaview Quatt (Particle Metrix). Subsequent videos of stained and total particles were recorded to determine the percentage of positive stained nanoparticles. Exosome surface marker analysis revealed 10 out of the 37 tested surface markers to be present with the most intense surface markers being CD81 and CD133. Furthermore, detection of CD81+ and CD133+ nanoparticles via Zetaview was found in all samples (n=9). The AF- derived nanoparticles were CD81+ and CD133+ at 73.51 ± 18.35 % and 30.41 ± 14.06 % (Mean ± SD), respectively. A high percentage of the nanoparticles were CD81+ with a smaller yet apparent display of CD133+ nanoparticles throughout the samples. Fluorescent characterization of the AF-derived samples demonstrated the reproducibility of both CD81+ and CD133+ nanoparticles. Studying the nature of these nanoparticle populations helps researchers to characterize samples consistently and could lead to understanding their therapeutic potential as a novel biologic.

16.
Obstetrics, Gynecology and Reproduction ; 16(1):81-89, 2022.
Article in Russian | EMBASE | ID: covidwho-1979782

ABSTRACT

Thrombosis of the umbilical cord vessels is a rare complication of pregnancy, combined with a high level of perinatal morbidity and mortality. Anomalies of vascular attachment (velamentous attachment), pathology of the umbilical cord (hyperspiralization, short or long umbilical cord), intrauterine infections, maternal diabetes mellitus and preeclampsia as well as meconium found in the amniotic fluid are among the risk factors of developing thrombosis in the umbilical cord vessels. Here we present two clinical observations of umbilical vein thrombosis at full-term pregnancy. In both cases, during pregnancy and childbirth, no signs of umbilical cord pathology were found according to cardiotocography and Doppler ultrasound;despite this, the children were born in hypoxic state. Both newborns were transferred to the second stage of treatment due to suspected intrauterine pneumonia. Velamentous attachment, intrauterine infections as well as meconium found in the amniotic fluid were the risk factors of developing umbilical vein thrombosis described in case 1 and case 2, respectively. During pregnancy, both female patients suffered from clinically confirmed novel coronavirus infection (COVID-19) and contacted patients with COVID-19 in the third trimester of gestation. It is likely that endothelial damage caused by the novel coronavirus SARS-CoV-2 was one of the risk factors for the development of umbilical vein thrombosis, but this issue requires to be further explored.

17.
Journal of SAFOG ; 14(3):271-274, 2022.
Article in English | EMBASE | ID: covidwho-1969637

ABSTRACT

Aim: To know the frequency of meconium-stained amniotic fluid (MSAF) among COVID-positive term pregnant mothers and to know perinatal outcomes in these neonates. Materials and methods: A retrospective study was conducted of COVID-positive term pregnancies admitted to Vanivilas hospital, Bangalore Medical College, during the study period of 1 year. The study period was from 1st of July 2020 to 31st of June 2021. High-risk pregnancies that confound the occurrence of MSAF were excluded (obstetric risk factors and medical risk factors complicating pregnancy). Data were collected from medical records of patients and parturition register, which are cross-verified with operation theater records and neonatal intensive care unit (NICU) registers. Results: In total, 200 pregnant women were included in the study. About 65% were delivered by cesarean, 34.5% by the vaginal route, and one vacuum-assisted delivery. In total, 199 live births and one fresh stillbirth are reported. About, 26% had MSAF and 6.5% of newborns had meconium aspiration syndrome. Grade I, II, and III cases were 4.5%, 12.5%, and 9% respectively. Low appearance, pulse, grimace, activity, and respiration (APGAR) scores were correlating with the grade of MSAF, which is statistically significant. There were two neonatal deaths in grade III MSAF cases. Conclusion: The frequency of MSAF is increased among COVID-positive mothers, which translates to low APGAR scores and poor perinatal outcomes. Vigilant intrapartum care is recommended for these pregnancies to reduce the risk of poor neonatal outcomes. Clinical significance: The current study is undertaken to know if coronavirus disease-2019 (COVID-19) is associated with an increased frequency of MSAF among COVID-positive pregnant women. Finding MSAF has implications on operative delivery, cesarean rates, and perinatal outcome. There is a lack of studies about MSAF and perinatal outcomes in COVID-positive mothers. Evidence generated by this study helps to counsel the COVID-positive mothers and guides in the management of COVID-positive laboring women.

18.
Pediatric Dermatology ; 39(SUPPL 1):59, 2022.
Article in English | EMBASE | ID: covidwho-1916271

ABSTRACT

Objectives: To report a rare case of extensive congenital miliaria crystallina. Results: A male infant was born at term by Caesarian section due to warning signs of fetal distress. The pregnancy had been uneventful. However, a maternal SARS-CoV2-infection occurred 2 days before birth. Immediately at birth, the newborn presented with a striking appearance of disseminated pinpoint-sized vesicles filled with clear fluid. Preemptive antibiotic treatment was initiated On dermatology consult, a diagnosis of congenital miliaria crystallina was made due to the typical clinical presentation. Investigations for congenital infections (Herpes, Varicella) were negative as well as repeat sampling for SARSCoV2. Antibiotic treatment was stopped. Treatment included reduction of ambient temperature/humidity and disinfectant dressings leading to a quick resolution of miliaria within 2-3 days. Clinical follow-up on DOL 20 revealed normal skin with areas of flaky desquamation. Discussion: Miliaria is a benign, transient disorder caused by occlusion and disruption of eccrine sweat ducts and occasionally occurs in infants. Congenital presentation of extensive miliaria crystallina however is exceptional with only sporadic reports in the medical literature. The role of SARS-CoV2 in our case remains unclear as fetal infection was excluded. However, a few cases of congenital miliaria were reported in the context of other maternal infections, suggesting a role of maternal fever and increased temperature of amniotic fluid in the pathogenesis of congenital miliaria. Clinicians should be aware of this striking yet harmless congenital presentation, which may mimic a congenital disorder of cornification or another severe skin disease, causing unnecessary anxiety.

19.
Fertility and Sterility ; 116(3 SUPPL):e6-e7, 2021.
Article in English | EMBASE | ID: covidwho-1880994

ABSTRACT

OBJECTIVE: To evaluate the accuracy of a modified bedside test in ruling out an ectopic pregnancy. The test is based on a lateral flow immunoassay for alpha-fetoprotein (AFP). It has been shown that a high AFP level in vaginal blood indicates the passage of fetal tissue, suggestive of a miscarriage [1].We hypothesized that high AFP levels in sampled intrauterine tissue, assuming non-heterotopic pregnancy, rules out the presence of an ectopic pregnancy. MATERIALS AND METHODS: This is a prospective cohort study. The study included pregnant women undergoing a dilation and curettage (D&C) for pregnancy loss or termination, women with pregnancy loss or an ectopic pregnancy presenting with vaginal bleeding, and non-pregnant women with vaginal bleeding. Vaginal blood was collected on gauzes, sanitary pads, and cotton swabs. Samples were then tested for AFP levels using a commercial kit (ROMplus, Laborie, USA) originally designed to detect leakage of amniotic fluid. This kit contains a lateral flow immunoassay strip capable of detecting the presence of AFP. Positive samples for AFP were retested at a later date (after 3 to 20 days) to ascertain the stability of AFP and reliability of the test. Official sonograms, pregnancy tests, and final pathology results were obtained to confirm pregnancy status as well as the presence or absence of fetal tissue in the vaginal blood. A sensitivity and specificity analysis was performed against these final results to validate the accuracy of the test strip in ruling out an ectopic pregnancy. RESULTS: A total of 30 vaginal blood samples were tested for AFP. All pregnant women who had a miscarriage or D&C had detectible AFP in their vaginal blood (n=13). On retesting the samples 3 to 20 days later, these results remained the same (positive test strip). The remaining 17 vaginal blood samples were from 4 women with ectopic pregnancies and from 13 non-pregnant women with vaginal bleeding. All 4 ectopic pregnancies had no AFP detected in the vaginal blood and only 1 out of 13 non-pregnant patient samples had AFP detected. The ROMplus test strip correctly detected AFP in all samples tested containing fetal tissue (n=13) resulting in a test sensitivity of 100%. ROMplus correctly identified the absence of AFP in 16 out of the 17 samples lacking fetal tissue, a 94% test specificity. CONCLUSIONS: ROMplus has the potential to accurately and reliably detect the presence of AFP, and hence fetal tissue, in vaginal blood samples. This could be a vital non-invasive aid in ruling out an ectopic pregnancy at the bedside (currently off-label use). Furthermore, it could limit the amount of invasive testing and visits needed in cases of pregnancies of unknown location. IMPACT STATEMENT: In light of the recent COVID-19 pandemic, a simple non-invasive bedside test to rule out an ectopic pregnancy is highly desired given its potential for reducing the number of visits, investigations performed, and personnel involved in the workup of a pregnancy of unknown location.

20.
Open Access Macedonian Journal of Medical Sciences ; 10:55-58, 2022.
Article in English | EMBASE | ID: covidwho-1705934

ABSTRACT

BACKGROUND: Pneumopericardium (PPC) is one of the rarest pulmonary air leak syndromes, but the incidence is the highest in the neonatal period. Risk factors include premature infants with respiratory distress (RD) syndrome, receiving active resuscitation, meconium aspiration syndrome, and aggressive mechanical ventilation. Several cases have also been reported related to COVID-19. CASE PRESENTATION: We report a case of a female newborn with a birth weight of 3300 grams a COVID-19 confirmed 35-year-old G3P2A0 mother. The baby was not crying at born and the amniotic fluid was stained green. The baby experienced RD and was intubated. A babygram was performed at the age of 5 h with the impression of a too deep endotracheal tube, neonatal pneumonia, and PPC. COVID-19 RT-PCR examination of the baby was positive. There were no signs of cardiac tamponade, so it was decided to take conservative and supportive management. CONCLUSION: Resolution of PPC was found on repeated babygram 26 h later. The baby was then discharged after 19 days of treatment.

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