Pregnancy Complications, Parasitic

妊娠并发症,寄生虫
  • 文章类型: Journal Article
    怀孕期间的疟疾感染与产妇死亡风险增加有关。以及不良的分娩结果。已知在妊娠中使用磺胺多辛-乙胺嘧啶(IPTp-SP)进行间歇性预防性治疗可改善妊娠结局。然而,撒哈拉以南非洲产前保健(ANC)中IPTp-SP的覆盖率仍远低于目标。这项研究旨在估计在撒哈拉以南非洲国家的ANC访问期间,疟疾服务准备在多大程度上影响IPTp-SP的吸收。
    这项研究包括六个撒哈拉以南非洲国家的3267名首次参加ANC的孕妇和一个多月前参加ANC的2797名孕妇。每个机构的疟疾服务准备情况包括四个指标:IPTp-SP准则的存在,SP可用性,将IPTp-SP服务集成到ANC中,以及IPTp-SP的提供者培训。结果变量指示孕妇在其当前的ANC就诊时是否接受IPTp-SP。改良的Poisson回归模型估计了有资格接受首次和后续剂量的妇女的疟疾服务准备与IPTp-SP摄取之间的关联。
    对于有资格接受首次剂量的女性,访问SP可用的机构与接受IPTp-SP的概率增加相关(风险比(RR)=1.43;95%置信区间(CI)=1.22~1.67,P<0.001).对于有资格接受下一次剂量的女性,机构中SP的可用性(RR=1.17;95%CI=1.04~1.32,P=0.008)和IPTp-SP服务与ANC的整合(RR=1.82;95%CI=1.21~2.74,P=0.004)与IPTp-SP摄取的可能性增加相关.反事实预测表明,加强提供者培训可以促进高吸收国家的IPTp-SP吸收,而更好的SP可用性和IPTp-SP整合到ANC将对低吸收国家产生重大影响。
    为了更好的IPTp-SP覆盖率,策略应该是定制的。高吸收国家应侧重于提供者培训,而低吸收的应确保IPTp-SP的可用性和服务集成。
    UNASSIGNED: Malaria infection during pregnancy is associated with an increased risk of maternal death, as well as adverse birth outcomes. Intermittent preventive treatment in pregnancy with sulfadoxine-pyrimethamine (IPTp-SP) is known to improve pregnancy outcomes. However, the coverage of IPTp-SP in antenatal care (ANC) in sub-Saharan Africa remains well below the target. This study aims to estimate to what extent malaria service readiness affects the uptake of IPTp-SP during ANC visits in sub-Saharan African countries.
    UNASSIGNED: This study included 3267 pregnant women attending ANC for the first time and 2797 pregnant women who had attended ANC more than a month ago in six sub-Saharan African countries. The readiness of malaria services at each institution includes four indicators: the presence of IPTp-SP guidelines, SP availability, integration of IPTp-SP service into ANC, and provider training on IPTp-SP. The outcome variable indicates whether a pregnant woman received IPTp-SP at her current ANC visit. A modified Poisson regression model estimated the associations between malaria service readiness and IPTp-SP uptake for women eligible for the first and subsequent doses.
    UNASSIGNED: For women eligible for their first dose, visiting an institution with available SP was associated with an increased probability of receiving IPTp-SP (risk ratio (RR) = 1.43; 95% confidence interval (CI) = 1.22 to 1.67, P < 0.001). For women who were eligible for their next dose, the availability of SP (RR = 1.17; 95% CI = 1.04 to 1.32, P = 0.008) and integration of IPTp-SP service into ANC (RR = 1.82; 95% CI = 1.21 to 2.74, P = 0.004) in the institution were associated with increased likelihood of IPTp-SP uptake. Counterfactual predictions indicated that enhanced provider training could boost IPTp-SP uptake in high-uptake countries, while better SP availability and IPTp-SP integration into ANC would significantly impact low-uptake countries.
    UNASSIGNED: For better IPTp-SP coverage, strategies should be customised. High uptake countries should focus on provider training, while low uptake ones should ensure IPTp-SP availability and service integration.
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  • 文章类型: Journal Article
    低收入和中等收入国家的不良出生结局与产妇维生素D缺乏和慢性蠕虫感染有关。这里,我们调查了母体血吸虫血吸虫是否影响母体或脐带维生素D状态以及分娩结局.在Lambaréné进行的一项针对孕妇的前瞻性横断面研究中,加蓬,我们诊断出母体血液中的寄生虫感染,尿液和粪便。分娩时,我们测量了母体和脐带血中的维生素D。S、嗜血杆菌,土壤传播的蠕虫,发现微丝虫的患病率为30.2%,13.0%,和8.8%,分别。在28%和15%的母亲中发现维生素D和钙水平不足,以及11.5%和1.5%的新生儿。维生素D充足的母亲低出生体重婴儿的风险较低(aOR=0.11,95%CI0.02-0.52,p=0.01)。而初产妇的后代的脐带维生素D水平较低,低维生素D水平会增加母体炎症的风险。母亲丝虫病与低钙水平有关,但是其他蠕虫感染对母亲或新生儿的维生素D和钙水平都没有影响。健康的分娩结果需要维持足够的维生素D和钙水平。在撒哈拉以南非洲的半农村地区,慢性孕产妇蠕虫感染不会破坏这些水平。
    Poor birth outcomes in low- and middle income countries are associated with maternal vitamin D deficiency and chronic helminth infections. Here, we investigated whether maternal Schistosoma haematobium affects maternal or cord vitamin D status as well as birth outcomes. In a prospective cross-sectional study of pregnant women conducted in Lambaréné, Gabon, we diagnosed maternal parasitic infections in blood, urine and stool. At delivery we measured vitamin D in maternal and cord blood. S. haematobium, soil-transmitted helminths, and microfilariae were found at prevalences of 30.2%, 13.0%, and 8.8%, respectively. Insufficient vitamin D and calcium levels were found in 28% and 15% of mothers, and in 11.5% and 1.5% of newborns. Mothers with adequate vitamin D had lower risk of low birthweight babies (aOR = 0.11, 95% CI 0.02-0.52, p = 0.01), whilst offspring of primipars had low cord vitamin D levels, and low vitamin D levels increased the risk of maternal inflammation. Maternal filariasis was associated with low calcium levels, but other helminth infections affected neither vitamin D nor calcium levels in either mothers or newborns. Healthy birth outcomes require maintenance of adequate vitamin D and calcium levels. Chronic maternal helminth infections do not disrupt those levels in a semi-rural setting in sub-Saharan Africa.
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  • 文章类型: Journal Article
    结论:研究论文探讨了锡金地区孕妇肠道寄生虫感染的负担和相关因素,印度,被归类为被忽视的热带病,影响全球15亿人,热带地区的比率较高。这些感染会带来重大的健康风险,导致贫血,孕产妇-围产期健康状况不佳,和延续世代营养不良和反复感染。一项针对锡金100名孕妇的横断面研究旨在确定肠道寄生虫病的负担和相关的社会人口统计学因素。与类似的研究相比,它报告的患病率较低,以贾第鞭毛虫为主要寄生虫。该研究发现肠道寄生虫病和贫血之间存在显著联系。总之,本文建议对血红蛋白水平低的孕妇进行常规筛查和驱虫,强调怀孕期间对肠道寄生虫病的健康教育和认识,尤其是在资源有限的环境中。遵守印度的孕期驱虫国家指南至关重要。
    CONCLUSIONS: The research paper explores the burden and associated factors of intestinal parasitic infections among pregnant women in Sikkim, India, categorized as neglected tropical diseases affecting 1.5 billion globally, with higher rates in tropical regions. These infections pose significant health risks, causing anemia, poor maternal-perinatal health, and perpetuating generational undernutrition and recurrent infections. A cross-sectional study of 100 pregnant women in Sikkim aimed to determine the burden of intestinal parasitosis and associated sociodemographic factors. It reported a lower prevalence compared to similar studies, with Giardia Lamblia as the dominant parasite. The study found a significant link between intestinal parasitosis and anemia. In conclusion, the paper recommends routine screening and deworming for pregnant women with low hemoglobin levels, emphasizing health education and awareness about intestinal parasitosis during pregnancy, especially in resource-limited settings. Adherence to India\'s National Guidelines for Deworming during pregnancy is crucial.
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  • 文章类型: Journal Article
    背景由于孕妇容易受到感染,妊娠期疟疾(MIP)是一个主要的公共卫生问题。导致流行地区的不良孕产妇/胎儿结局。方法我们进行了一项基于现场的研究,以评估MIP的负担(注册和随访时的患病率),并确定中央邦Balaghat区Birsa和Baihar街区的MIP风险因素,有多年生的疟疾传播。疟疾筛查(2015-2017年)通过显微镜和二价快速诊断测试(SDBiolineRDT,疟疾抗原恶性疟原虫/间日疟原虫Pf/Pv)。干燥的血斑用于血红蛋白估计。获得了过去和现在怀孕状态的社会人口统计学细节。部分孕妇在怀孕期间接受了疟疾随访。分娩后还对妇女进行了疟疾筛查。疟疾治疗按照2013年国家指南进行。多因素分析评估疟疾的独立危险因素。结果共筛查1728例孕妇,其中1651年被列入最终分析。首次筛查时的疟疾患病率为23.4%(Pf88%)。初孕(G1)的患病率和Pf寄生虫血症均显着高于多次妊娠(G>2;p值分别为0.012和0.019)。与Gond组(OR[95%CI];2.4[1.7-3.4];p<0.00001)和非土著组(OR[95%CI];8.3[3.9-19.7];p<0.00001)相比,Baiga族孕妇患疟疾的可能性更高。妇女的原始地位,怀孕的第一和第二三个月,属于土著民族部落群体的妇女和家庭中全年经济作物不足(社会经济指标)是疟疾的独立危险因素。结论MIP是中央邦Balaghat区Birsa和Baihar街区森林部落定居点的主要公共卫生问题,需要立即干预。
    Background Malaria in pregnancy (MIP) is a major public health problem due to the vulnerability of pregnant women to infections, resulting in adverse maternal/foetal outcomes in endemic areas. Methods We did a field-based study to assess the burden of MIP (prevalence at the time of enrolment and follow-up) and to identify risk factors for MIP in the Birsa and Baihar blocks of district Balaghat in Madhya Pradesh, which have perennial malaria transmission. Malaria screening (during 2015-2017) was done by microscopy and bivalent rapid diagnostic test (SD Bioline RDT, malaria antigen Plasmodium falciparum/Plasmodium vivax Pf/Pv). Dried blood spots were used for haemoglobin estimation. Sociodemographic details with past and present pregnancy status were obtained. A subset of pregnant women were followed up for malaria during pregnancy. Women were also screened for malaria post delivery. Malaria treatment was given as per the National Guidelines of 2013. Multivariate analysis was done to assess independent risk factors for malaria. Results A total of 1728 pregnant women were screened, of which 1651 were included in the final analysis. Malaria prevalence at first screening was 23.4% (Pf 88%). Prevalence and Pf parasitaemia both were significantly higher among primigravid (G1) compared to multigravid (G>2; p value 0.012 and 0.019, respectively). Pregnant women of the Baiga ethnic group were more likely to have malaria compared to those belonging to the Gond group (OR [95% CI]; 2.4 [1.7-3.4]; p<0.00001) and non-indigenous group (OR [95% CI]; 8.3 [3.9-19.7]; p<0.00001). Primigravid status of women, first and second trimester of pregnancy, women belonging to indigenous ethnic tribal group and cash crop insufficiency for whole year (a socioeconomic indicator) in the family were the independent risk factors for malaria. Conclusion MIP is a major public health problem in forested tribal settlements of Birsa and Baihar blocks of Balaghat district in Madhya Pradesh and requires immediate intervention.
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  • 文章类型: Journal Article
    怀孕期间的疟疾导致胎盘疟疾。胎盘疟疾中复杂的胎儿影响的主要发病机制是由于胎盘中恶性疟原虫感染的红细胞的隔离而导致的组织缺氧。然而,胎盘间日疟原虫感染的发病机制尚未得到彻底研究.缺氧诱导因子-1α(HIF-1α)是响应缺氧条件的关键转录介质,它与许多化学介质的变化和不平衡相互作用,包括血管生成因子,导致胎儿生长异常.
    这项研究是在莫默雷进行的,SikkaRegency,东努沙登加拉省,以前被称为疟疾流行区之一,低出生体重(LBW)病例的发病率很高。这项研究收集了在TCHiller地区医院分娩LBW婴儿的母亲的外周血和脐带血样本以及胎盘组织。通过显微镜和PCR技术检查所有血液样本的寄生虫,而血浆VEGF水平,PlGF,使用ELISA测定VEGFR-1、VEGFR-2和HIF-1α。从胎盘组织学切片中确定了感染的红细胞和疟原虫色素的隔离,用免疫荧光技术观察胎盘血管生成因子的表达。
    在这项研究中,33例资料完整,有待分析。其中,19个样本被诊断为间日疟疾,无恶性疟疾。婴儿体重和胎盘组织中所有血管生成因子的Δ10百分位数生长曲线存在显着差异{VEGF,PlGF,VEGFR-1、VEGFR-2和HIF-1α}在感染和未感染病例之间(p<0.05),但不是血浆中的VEGF和VEGFR-2。
    本研究表明间日疟原虫隔离可能通过HIF-1α导致的血管生成因子的改变和失衡促进LBW。
    UNASSIGNED: Malaria in pregnancy leads to placental malaria. The primary pathogenesis of the complex fetal implications in placental malaria is tissue hypoxia due to sequestrations of Plasmodium falciparum-infected erythrocytes in the placenta. However, the pathomechanism of placental Plasmodium vivax infection has not been thoroughly investigated. Hypoxia-inducible factor-1α (HIF-1α) is a key transcriptional mediator of the response to hypoxic conditions, which interacts with the change and imbalances of many chemical mediators, including angiogenic factors, leading to fetal growth abnormality.
    UNASSIGNED: This study was conducted cross-sectionally in Maumere, Sikka Regency, East Nusa Tenggara Province, previously known as one of the malaria endemic areas with a high incidence of low birth weight (LBW) cases. This study collected peripheral and umbilical blood samples and placental tissues from mothers who delivered their babies with LBW at the TC Hiller Regional Hospital. All of the blood samples were examined for parasites by microscopic and PCR techniques, while the plasma levels of VEGF, PlGF, VEGFR-1, VEGFR-2, and HIF-1α were determined using ELISA. The sequestration of infected erythrocytes and hemozoin was determined from placental histological slides, and the expression of placenta angiogenic factors was observed using the immunofluorescent technique.
    UNASSIGNED: In this study, 33 cases had complete data to be analyzed. Of them, 19 samples were diagnosed as vivax malaria and none of falciparum malaria. There were significant differences in Δ 10th percentile growth curve of baby\'s body weights and also all angiogenic factors in placental tissues {VEGF, PlGF, and VEGFR-1, VEGFR-2, and HIF-1α} between those infected and not infected cases (p<0.05), but not for VEGF and VEGFR-2 in the plasma.
    UNASSIGNED: This study indicated that Plasmodium vivax sequestration may promote LBW through alterations and imbalances in angiogenic factors led by HIF-1α.
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  • 文章类型: Journal Article
    背景:怀孕期间的疟疾可导致孕产妇和围产期的不良反应。尽管采取了预防措施,最近的研究表明,怀孕期间的疟疾仍然是一个威胁健康的问题,特别是在撒哈拉以南非洲国家。本研究旨在确定苏丹中部Rabak医院胎盘疟疾的患病率和相关因素。
    方法:一项横断面研究于2021年9月至10月进行。包括在苏丹中部Rabak妇产医院分娩的孕妇。问卷用于收集产科和社会人口统计信息。使用母体制备疟疾血膜,胎盘,和脐带血,并进行了胎盘组织学检查。进行逻辑回归分析。
    结果:对于208名女性,年龄和胎次的中位数(四分位数范围)分别为25(21.0-30.0)岁和2(1-4),分别。25名(12.0%)妇女使用过杀虫剂处理过的蚊帐。活动性感染,慢性活动性感染,和过去的慢性感染在四个(1.9%)中被检测到,五个(2.4%),和35个(16.8%)胎盘,分别。一百六十四个(78.8%)胎盘没有感染迹象。Logistic回归分析显示,没有一个被检查的因素(年龄,奇偶校验,教育,产前保健水平,使用杀虫剂处理过的蚊帐,和血型)与胎盘疟疾有关。
    结论:疟疾影响20%的孕妇,不管他们的年龄和平价。因此,应鼓励在这方面采取预防措施。
    BACKGROUND: Malaria during pregnancy can lead to maternal and perinatal adverse effects. Despite the preventive measures, recent research has shown that malaria during pregnancy is still a threatening health problem, especially in Sub-Saharan African countries. The current study was conducted to determine the prevalence of and factors associated with placental malaria in Rabak Hospital in central Sudan.
    METHODS: A cross-sectional study was conducted from September to October 2021. Pregnant women who delivered at the Rabak Maternity Hospital in Central Sudan were included. A questionnaire was used to gather both obstetric and socio-demographic information. Blood films for malaria were prepared using the maternal, placental, and cord blood, and a placental histology was performed. A logistic regression analysis was performed.
    RESULTS: For the 208 women, the medians (interquartile range) of their age and parity were 25 (21.0 ‒30.0) years and 2 (1‒4), respectively. Twenty-five (12.0%) of the women had used insecticide-treated nets. Active infection, active-chronic infection, and past-chronic infection were detected in four (1.9%), five (2.4%), and 35 (16.8%) placentas, respectively. One hundred and sixty-four (78.8%) placentas showed no signs of infection. Logistic regression analysis showed that none of the examined factors (age, parity, education, antenatal care level, use of insecticide-treated nets, and blood group) was associated with placental malaria.
    CONCLUSIONS: Malaria affects 20% of pregnant women, regardless of their age and parity. Preventative measures should therefore be encouraged in this area.
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  • 文章类型: Case Reports
    在某些情况下,可以考虑急性胰腺炎的较少原因。例如在流行地区的寄生。该报告描述了一名20多岁的怀孕女性(孕中期),她表现出3天持续的上腹部疼痛,并从口腔中传播蠕虫。她被诊断为轻度急性胰腺炎,鉴于血清脂肪酶显着升高且没有器官衰竭。FecalysisshowedAscarislumbricoidesova;hence,她接受了甲苯咪唑治疗。MR胰胆管造影显示胆囊和十二指肠内有842mL坏死性胰腺液收集和管状流空灶,与蠕虫病一致。在没有引流指征的情况下,对患者进行了保守治疗。腹痛明显改善,在急性胰腺炎发作后4个月,她最终接受了真空辅助分娩给健康的足月婴儿。
    Rarer causes of acute pancreatitis may be considered in certain settings, such as parasitism in endemic regions. This report describes a pregnant female (second trimester) in her 20s who presented with 3-day steady epigastric pain radiating to the back and passage of worm from the mouth. She was diagnosed with mild acute pancreatitis, given a significantly elevated serum lipase and absence of organ failures. Fecalysis showed Ascaris lumbricoides ova; hence, she was treated with mebendazole. Plain MR cholangiopancreatography showed an 842 mL necrotic pancreatic fluid collection and tubular flow void foci within the gallbladder and duodenum consistent with helminthiasis. The patient was managed conservatively in the absence of indications for drainage. The abdominal pain remarkably improved, and she underwent eventual vacuum-assisted delivery to a healthy term baby 4 months after the bout of acute pancreatitis.
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  • 文章类型: Journal Article
    弓形虫是一种机会性和致病性专性的细胞内寄生原虫,在世界范围内广泛分布,可感染大多数温血动物,严重危害人类健康,影响畜牧业生产。弓形虫感染引起的弓形虫病具有不同的临床表现,主要由弓形虫的毒力和宿主的差异决定。在这种情况的表现中,流产,死产,如果妇女在怀孕早期感染弓形虫,胎儿畸形可能会发生。这里,我们讨论弓形虫rhoptry蛋白如何影响宿主妊娠结局,并推测相关的信号通路.弓形虫rhoptry蛋白对胎盘屏障的影响是复杂的。Rhoptry蛋白不仅调节干扰素调节基因(IRGs)以确保寄生虫在活化细胞中的存活,而且还促进蠕虫在组织中的传播和寄生虫的侵袭能力。这些rhoptry蛋白的功能和相关的信号通路突出了弓形虫穿过胎盘屏障并影响胎儿发育的相关机制,并将指导未来的研究以揭示宿主-病原体相互作用的复杂性。
    Toxoplasma gondii is an opportunistic and pathogenic obligate intracellular parasitic protozoan that is widespread worldwide and can infect most warm-blooded animals, seriously endangering human health and affecting livestock production. Toxoplasmosis caused by T. gondii infection has different clinical manifestations, which are mainly determined by the virulence of T. gondii and host differences. Among the manifestations of this condition, abortion, stillbirth, and fetal malformation can occur if a woman is infected with T. gondii in early pregnancy. Here, we discuss how the T. gondii rhoptry protein affects host pregnancy outcomes and speculate on the related signaling pathways involved. The effects of rhoptry proteins of T. gondii on the placental barrier are complex. Rhoptry proteins not only regulate interferon-regulated genes (IRGs) to ensure the survival of parasites in activated cells but also promote the spread of worms in tissues and the invasive ability of the parasites. The functions of these rhoptry proteins and the associated signaling pathways highlight relevant mechanisms by which Toxoplasma crosses the placental barrier and influences fetal development and will guide future studies to uncover the complexity of the host-pathogen interactions.
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  • 文章类型: Journal Article
    抑郁综合征(DS)是妊娠期和产后常见的并发症,由多种有机/遗传和环境因素触发。临床和生化随访对DS的早期诊断和预后至关重要。原生动物弓形虫在寄生虫初次感染时会对胎儿造成感染性损害。然而,在长期感染中,孕妇发展免疫保护以保护胎儿,尽管它们仍然容易受到弓形虫诱导的病理或炎症作用。本研究旨在探讨孕妇弓形虫血清阳性和血清阴性的血浆炎症生物标志物。诊断为轻度和中度/重度DS。
    孕妇(n=45;年龄=18-39岁)在OuroPreto的保健中心进行产前护理期间被招募,米纳斯吉拉斯州,巴西。参与者被要求完成一份社会人口统计问卷,提交给标准化的DS量表计算器(贝克抑郁量表问卷,爱丁堡产后抑郁量表,和重度抑郁发作模块)。此外,收集4mL血液用于血浆神经素素,CCL2,IL-17A,和IL-33分析。
    患有慢性弓形虫接触的妊娠志愿者均为IgG(44%;n=21),血浆IL-33,IL-17A增加,和神经血清素水平,但不是CCL2,与未感染的孕妇相比。用贝克的抑郁症清单,在诊断为轻度DS的弓形虫感染女性中,我们观察到血浆IL-17A和IL-33的增加,而neuroserpin与轻度和中度/重度DS相关。
    我们的数据表明,患有慢性弓形虫感染的孕妇的DS与神经系统疾病密切相关,可能部分由血浆神经酶素介导,IL-33和IL-17A水平。
    UNASSIGNED: Depressive syndrome (DS) is a common complication during pregnancy and the postpartum period, and is triggered by multiple organic/genetic and environmental factors. Clinical and biochemical follow-up is essential for the early diagnosis and prognosis of DS. The protozoan Toxoplasma gondii causes infectious damage to the fetus during parasite primary-infection. However, in long-term infections, pregnant women develop immune protection to protect the fetus, although they remain susceptible to pathological or inflammatory effects induced by T. gondii. This study aimed to investigate plasma inflammatory biomarkers in pregnant women seropositive and seronegative for T. gondii, with diagnoses of minor and moderate/severe DS.
    UNASSIGNED: Pregnant women (n=45; age=18-39 years) were recruited during prenatal care at health centers in Ouro Preto, Minas Gerais, Brazil. Participants were asked to complete a socio-demographic questionnaire to be submitted to well-standardized DS scale calculators (Beck Depression Inventory Questionnaire, Edinburgh Postnatal Depression Scale, and Major Depressive Episode Module). Additionally, 4 mL of blood was collected for plasma neuroserpin, CCL2, IL-17A, and IL-33 analysis.
    UNASSIGNED: Pregnant volunteers with chronic T. gondii contact were all IgG+ (44%; n=21) and exhibited increased plasma IL-33, IL-17A, and neuroserpin levels, but not CCL2, compared to uninfected pregnant women. Using Beck\'s depression inventory, we observed an increase in plasma IL-17A and IL-33 in women with T. gondii infeCction diagnosed with mild DS, whereas neuroserpin was associated with minor and moderate/severe DS.
    UNASSIGNED: Our data suggest a close relationship between DS in pregnant women with chronic T. gondii infection and neurological conditions, which may be partially mediated by plasma neuroserpin, IL-33, and IL-17A levels.
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  • 文章类型: Journal Article
    根据微环境的不同,γδT细胞可能具有与Th1,Th2,Th17,调节性T细胞或抗原呈递细胞相似的特征。尽管Th1/Th2平衡对妊娠相关疟疾和结局的影响有广泛的文献记载,目前尚无关于γδT细胞表型改变与胎盘疟疾(PM)与妊娠结局之间关系的报道。本研究旨在研究γδT细胞及其亚群在胎盘恶性疟原虫疟疾中的参与。
    在雅温得进行的一项病例对照研究中,喀麦隆从2022年3月到2023年5月,外围,在分娩时从50名妇女收集胎盘和脐带血样品(如通过光学显微镜诊断的,29PM阴性:PM-和21PM阳性:PM+)。使用血红蛋白计测量血红蛋白水平。PBMC,使用hisopaque-1077分离IVBMC和CBMC,并用于表征总γδT细胞群体和亚群(Vδ1,Vδ2+,Vδ1-Vδ2-)通过流式细胞术。
    胎盘恶性疟原虫感染与IVBMC中总γδT细胞和PBMC和IVBMC中Vδ1亚群的频率显着增加有关,但PBMC和IVBMC中Vδ2+亚群的频率降低。激活标记的表达:HLA-DR,与PM-组相比,PM中总γδT细胞和亚群中的耗竭标志物(PD1和TIM3)显着上调。IVBMC中总γδT细胞的频率,IVBMC中总γδT细胞和亚群的TIM-3表达,总γδT细胞内的HLA-DR表达和IVBMC中的Vδ2+亚群与母体血红蛋白水平呈负相关。此外,PBMC中总γδT细胞的频率和CBMC中Vδ2+亚群中PD1的表达与出生体重呈负相关,这与PBMC中Vδ1-Vδ2-亚群的频率和IVBMC中Vδ2+亚群中HLA-DR的表达呈正相关,与母体血红蛋白水平和出生体重呈正相关,分别。
    数据表明恶性疟原虫胎盘疟疾中激活和耗尽的γδT细胞上调,对妊娠结局的影响,包括母亲血红蛋白水平和出生体重。
    UNASSIGNED: Depending on the microenvironment, γδ T cells may assume characteristics similar to those of Th1, Th2, Th17, regulatory T cells or antigen presenting cells. Despite the wide documentation of the effect of Th1/Th2 balance on pregnancy associated malaria and outcomes, there are no reports on the relationship between γδ T cell phenotype change and Placental Malaria (PM) with pregnancy outcomes. This study sought to investigate the involvement of γδ T cells and its subsets in placental Plasmodium falciparum malaria.
    UNASSIGNED: In a case-control study conducted in Yaoundé, Cameroon from March 2022 to May 2023, peripheral, placental and cord blood samples were collected from 50 women at delivery (29 PM negative: PM- and 21 PM positive: PM+; as diagnosed by light microscopy). Hemoglobin levels were measured using hemoglobinometer. PBMCs, IVBMCs and CBMCs were isolated using histopaque-1077 and used to characterize total γδ T cell populations and subsets (Vδ1+, Vδ2+, Vδ1-Vδ2-) by flow cytometry.
    UNASSIGNED: Placental Plasmodium falciparum infection was associated with significant increase in the frequency of total γδ T cells in IVBMC and of the Vδ1+ subset in PBMC and IVBMC, but decreased frequency of the Vδ2+ subset in PBMC and IVBMC. The expression of the activation marker: HLA-DR, and the exhaustion markers (PD1 and TIM3) within total γδ T cells and subsets were significantly up-regulated in PM+ compared to PM- group. The frequency of total γδ T cells in IVBMC, TIM-3 expression within total γδ T cells and subsets in IVBMC, as well as HLA-DR expression within total γδ T cells and Vδ2+ subset in IVBMC were negatively associated with maternal hemoglobin levels. Furthermore, the frequency of total γδ T cells in PBMC and PD1 expression within the Vδ2+ subset in CBMC were negatively associated with birth weight contrary to the frequency of Vδ1-Vδ2- subset in PBMC and HLA-DR expression within the Vδ2+ subset in IVBMC which positively associated with maternal hemoglobin level and birth weight, respectively.
    UNASSIGNED: The data indicate up-regulation of activated and exhausted γδ T cells in Plasmodium falciparum placental malaria, with effects on pregnancy outcomes including maternal hemoglobin level and birth weight.
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