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neonatal immune response

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https://www.readbyqxmd.com/read/28188768/frequency-of-toxocara-spp-antibodies-in-umbilical-cords-of-newborns-attended-atthe-university-hospital-in-southern-brazil-and-factors-associated-with-infection
#1
Paula Costa Santos, Paula Lima Telmo, Lis Maurente Lehmann, Carolina Lorenzi, Carolina Hirsch, Gabriela Torres Mattos, Gabriel Baracy Klafke, Maria Elisabeth Aires Berne, Carla Vitola Gonçalves, Carlos James Scaini
Toxocariasis is a neglected and geographically widespread parasitic disease. The detection of specific antibodies associated with this disease is required to confirm its clinical diagnosis and to aid in prevention. Although helminth infection during pregnancy can promote foetal immune responses with long-term effects, specific information regarding the risk of Toxocara spp. infection to the human foetus during pregnancy is lacking.Therefore,the present study aimed to investigate the frequency of antibodies against Toxocara spp...
February 7, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28183352/combined-effect-of-bcg-vaccination-and-enriched-environment-promote-neurogenesis-and-spatial-cognition-via-a-shift-in-meningeal-macrophage-m2-polarization
#2
Fangfang Qi, Zejie Zuo, Junhua Yang, Saisai Hu, Yang Yang, Qunfang Yuan, Juntao Zou, Kaihua Guo, Zhibin Yao
BACKGROUND: The spatial learning abilities of developing mice benefit from extrinsic cues, such as an enriched environment, with concomitant enhancement in cognitive functions. Interestingly, such enhancements can be further increased through intrinsic Bacillus Calmette-Guérin (BCG) vaccination. RESULTS: Here, we first report that combined neonatal BCG vaccination and exposure to an enriched environment (Enr) induced combined neurobeneficial effects, including hippocampal long-term potentiation, and increased neurogenesis and spatial learning and memory, in mice exposed to the Enr and vaccinated with BCG relative to those in the Enr that did not receive BCG vaccination...
February 10, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28179905/plasma-levels-of-macrophage-migration-inhibitory-factor-and-d-dopachrome-tautomerase-show-a-highly-specific-profile-in-early-life
#3
Thierry Roger, Luregn J Schlapbach, Anina Schneider, Manuela Weier, Sven Wellmann, Patrick Marquis, David Vermijlen, Fred C G J Sweep, Lin Leng, Richard Bucala, Thierry Calandra, Eric Giannoni
Macrophage migration inhibitory factor (MIF) is a pleiotropic, constitutively expressed, pro-inflammatory cytokine and an important regulator of immune responses. d-dopachrome tautomerase (DDT), a newly described member of the MIF protein superfamily, shares sequence homology and biological activities with MIF. We recently reported that high expression levels of MIF sustain innate immune responses in newborns. Here, we elected to further characterize age-dependent MIF expression and to define whether DDT shares a similar expression profile with MIF...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28167590/chikungunya-and-neonatal-immunity-fatal-vertically-transmitted-chikungunya-infection
#4
Tracy Evans-Gilbert
Chikungunya is a mosquito-borne infectious disease that has emerged as a global pathogen. The virus can pass vertically from mother to child especially during the perinatal period, with an intrapartum vertical transmission rate of 50%. Approximately half of the neonates infected with chikungunya present with severe symptoms and infrequently death. This report summarizes two severe cases of vertically transmitted neonatal chikungunya infection. One case was confirmed by real-time reverse transcription polymerase chain reaction and the other fulfilled clinical and epidemiological criteria...
February 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28162823/mucosal-vaccination-promotes-clearance-of-streptococcus-agalactiae-vaginal-colonization
#5
Jacqueline A Baker, Emma L Lewis, Leah M Byland, Maryam Bonakdar, Tara M Randis, Adam J Ratner
Group B Streptococcus (GBS) is a leading cause of morbidity and mortality in infants, and colonization of the maternal genital tract is the primary risk factor for newborn infection. Despite the importance of mucosal colonization in GBS pathogenesis, relevant host and bacterial factors are incompletely understood. We investigated the role of humoral immunity in clearance of vaginal colonization in vivo. B-cell-deficient mice or those lacking neonatal Fc-receptor, a mediator of IgG transport to the vaginal mucosa, exhibit prolonged GBS vaginal colonization compared to wild type animals...
February 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28161165/supplemental-methionine-choline-or-taurine-alter-in-vitro-gene-network-expression-of-polymorphonuclear-leukocytes-from-neonatal-holstein-calves
#6
M K Abdelmegeid, M Vailati-Riboni, A Alharti, F Batistel, J J Loor
Isolated PMNL from neonatal calves were used to evaluate the effect of Met, choline, and taurine supplementation on mRNA expression of genes related to the Met cycle and innate immunity. Five neonatal Holstein calves (3 wk old) were used for PMNL isolation and in vitro culture. The selected genes were related to the 1-carbon and Met cycles, cell signaling and cytokine mediators, inflammation, antimicrobial and killing mechanism associated genes, immune mediators, adhesion, and pathogen recognition. The results indicated that supplementation of Met, choline, and taurine increased homocysteine synthesis through upregulation of SAHH...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28160500/il-10-expression-in-macrophages-from-neonates-born-from-obese-mothers-is-suppressed-by-il-4-and-lps-inf%C3%AE
#7
Francisca Cifuentes-Zúñiga, Viviana Arroyo-Jousse, Gustavo Soto-Carrasco, Paola Casanello, Ricardo Uauy, Bernardo J Krause, José A Castro-Rodríguez
: Obese women offspring have a higher risk of developing chronic diseases associated with an altered immune function. We aim to determine, in neonatal monocyte-derived macrophages, whether maternal obesity is associated with an altered expression and DNA methylation of pro- and anti-inflammatory genes, along with a higher pro-inflammatory response. Cord blood from newborns of obese (Ob) and lean (control) women were obtained at delivery. Monocytes were isolated and differentiated into macrophages, in which M1 (LPS/IFNγ) and M2 (IL-4) polarization were assayed...
February 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28154564/immunization-of-newborn-mice-accelerates-the-architectural-maturation-of-lymph-nodes-but-aid-dependent-igg-responses-are-still-delayed-compared-to-the-adult
#8
Rosario Munguía-Fuentes, Juan Carlos Yam-Puc, Aarón Silva-Sánchez, Edith Marcial-Juárez, Isis Amara Gallegos-Hernández, Juana Calderón-Amador, Troy D Randall, Leopoldo Flores-Romo
Lymph nodes (LNs) have evolved to maximize antigen (Ag) collection and presentation as well as lymphocyte proliferation and differentiation-processes that are spatially regulated by stromal cell subsets, including fibroblastic reticular cells (FRCs) and follicular dendritic cells (FDCs). Here, we showed that naïve neonatal mice have poorly organized LNs with few B and T cells and undetectable FDCs, whereas adult LNs have numerous B cells and large FDC networks. Interestingly, immunization on the day of birth accelerated B cell accumulation and T cell recruitment into follicles as well as FDC maturation and FRC organization in neonatal LNs...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28135671/innate-immune-response-in-neonate-holstein-heifer-calves-fed-fresh-or-frozen-colostrum
#9
Juliana França Dos Reis Costa, Sylvia Marquart Fontes Novo, Camila Costa Baccili, Natália Meirelles Sobreira, David John Hurley, Viviani Gomes
The aim of this research was to evaluate the influence of maternal cells from colostrum on the development and function of the innate immune response in Holstein calves. Calves were divided into 2 groups: COL+ (n=10) received fresh colostrum; and COL- (n=10) which received frozen colostrum containing no viable cells. The calves were assessed before colostrum intake (D0), 48h of age (D2), and weekly from D7 up to D28. Blood samples were collected for analysis of the distribution of leukocytes, cellular phenotype and in vitro granulocyte function...
January 17, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28129361/single-dose-caffeine-protects-the-neonatal-mouse-brain-against-hypoxia-ischemia
#10
Max Winerdal, Vijay Urmaliya, Malin E Winerdal, Bertil B Fredholm, Ola Winqvist, Ulrika Ådén
In this randomized blinded study, we investigated caffeine 5 mg/kg treatment given directly after neonatal brain hypoxia ischemia. Brain morphology, behavior and key brain infiltrating immune populations were examined. Caffeine treatment significantly improves outcome when compared to phosphate buffered saline. Flow cytometric analysis of immune responses revealed no persistent immunological alterations. Given its safety caffeine emerges as a candidate for neuroprotective intervention after neonatal brain injury...
2017: PloS One
https://www.readbyqxmd.com/read/28118945/ro52-autoantibodies-arise-from-self-reactive-progenitors-in-a-mother-of-a-child-with-neonatal-lupus
#11
Joanne H Reed, Miroslaw K Gorny, Liuzhe Li, Timothy Cardozo, Jill P Buyon, Robert M Clancy
The detection of cardiac conduction defects in an 18-24 week old foetus in the absence of structural abnormalities predicts with near certainty the presence of autoantibodies against 60kD and 52kD SSA/Ro in the mother regardless of her health status. Previous studies have emphasized these autoantibodies as key mediators of tissue injury. The aim of this study was to focus on the anti-Ro52 response to determine whether these autoantibodies originate from progenitors that are inherently self-reactive or from B-cells that acquire self-reactivity during an immune response...
January 21, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28118536/csf-cytokines-correlate-with-aseptic-meningitis-and-blood-brain-barrier-function-in-neonatal-onset-multisystem-inflammatory-disease-nomid
#12
Jackeline Rodriguez-Smith, Yen-Chih Lin, Wanxia Li Tsai, Hanna Kim, Gina Montealegre-Sanchez, Dawn Chapelle, Yan Huang, Cailin H Sibley, Massimo Gadina, Robert Wesley, Bibiana Bielekova, Raphaela Goldbach-Mansky
OBJECTIVE: To evaluate proinflammatory cytokines and leukocyte subpopulations in cerebrospinal spinal fluid (CSF) and blood of NOMID patients post-treatment; and to compare inflammatory cytokines in CSF and blood in 6 patients treated with two IL-1 blockers, anakinra and canakinumab. METHODS: We immunophenotyped CSF on 17 anakinra-treated pediatric NOMID patients during routine follow-up visits between December 2011 and October 2013 and analyzed CSF cytokine levels in baseline and 3-5 years follow-up samples compared to healthy controls...
January 24, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28107386/regulation-of-pi-2b-pilus-expression-in-hypervirulent-streptococcus-agalactiae-st-17-bm110
#13
Bruno Périchon, Noémi Szili, Laurence du Merle, Isabelle Rosinski-Chupin, Myriam Gominet, Samuel Bellais, Claire Poyart, Patrick Trieu-Cuot, Shaynoor Dramsi
The widely spread Streptococcus agalactiae (also known as Group B Streptococcus, GBS) "hypervirulent" ST17 clone is strongly associated with neonatal meningitis. The PI-2b locus is mainly found in ST17 strains but is also present in a few non ST17 human isolates such as the ST-7 prototype strain A909. Here, we analysed the expression of the PI-2b pilus in the ST17 strain BM110 as compared to the non ST17 A909. Comparative genome analyses revealed the presence of a 43-base pair (bp) hairpin-like structure in the upstream region of PI-2b operon in all 26 ST17 genomes, which was absent in the 8 non-ST17 strains carrying the PI-2b locus...
2017: PloS One
https://www.readbyqxmd.com/read/28103319/an-hsv-2-trivalent-vaccine-is-immunogenic-in-rhesus-macaques-and-highly-efficacious-in-guinea-pigs
#14
Sita Awasthi, Lauren M Hook, Carolyn E Shaw, Bapi Pahar, Jacob A Stagray, David Liu, Ronald S Veazey, Harvey M Friedman
A genital herpes vaccine is urgently needed to prevent pain and suffering, reduce the incidence of neonatal herpes, and decrease the risk of HIV acquisition and transmission that accompanies genital infection. We evaluated a trivalent HSV-2 subunit antigen vaccine administered with CpG and alum in rhesus macaques and guinea pigs. The vaccine contains glycoproteins C, D and E (gC2, gD2, gE2) to block virus entry by gD2 and immune evasion by gC2 and gE2. In rhesus macaques, the trivalent vaccine induced plasma and mucosa neutralizing antibodies, antibodies that block gC2 and gE2 immune evasion activities, and stimulated CD4 T cell responses...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28102058/neonatal-immune-state-is-influenced-by-maternal-allergic-rhinitis-and-associated-with-regulatory-t-cells
#15
Lu Tan, Jing Ou, Zezhang Tao, Yonggang Kong, Yu Xu
PURPOSE: Maternal influences contribute to the origin of allergic diseases, but the mechanisms are not clear. The current literature prompted the role of epigenetics in the development of allergic diseases. We sought to investigate the roles of regulatory T (Treg) cells and Forkhead box p3 (Foxp3) DNA methylation in the process of maternal transmission of allergic rhinitis (AR) susceptibility. METHODS: BALB/c female mice (AR mother) were sensitized by intraperitoneal injection of Dermatophagoides pteronyssinus (Der p) 1 on day 1 and 7...
March 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28097694/serial-cytokine-alterations-and-abnormal-neuroimaging-in-newborn-infants-with-encephalopathy
#16
Fiona M O'Hare, R William G Watson, Amanda O'Neill, Ricardo Segurado, Deirdre Sweetman, Paul Downey, Eoghan Mooney, John Murphy, Veronica Donoghue, Eleanor J Molloy
AIM: Inflammatory cytokines may play a role in the final common pathway in the pathogenesis of hypoxic-ischaemic injury in experimental models. We aimed to profile the systemic pro- and anti-inflammatory response over the first week of life in term infants at risk of neonatal encephalopathy. METHOD: In a tertiary referral university neonatal intensive care unit, serial blood samples were analysed from 41 term infants (requiring resuscitation at birth) in this prospective observational pilot study...
January 17, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28086957/regulatory-t-cells-and-il10-suppress-pulmonary-host-defense-during-early-life-exposure-to-radical-containing-combustion-derived-ultrafine-particulate-matter
#17
Sridhar Jaligama, Jordy Saravia, Dahui You, Nikki Yadav, Greg I Lee, Bishwas Shrestha, Stephania A Cormier
BACKGROUND: Exposure to elevated levels of particulate matter (PM) is associated with increased risk of morbidity and mortality due to respiratory tract viral infections in infants. Recent identification of environmentally persistent free radicals (EPFRs) in the PM from a variety of combustion sources suggests its role in the enhancement of disease severity of lower respiratory tract infections (LRTI). Our previous studies demonstrated that acute exposure to EPFRs induces pulmonary immunosuppression allowing for enhanced influenza disease severity...
January 13, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28060871/a-neonatal-murine-model-of-mrsa-pneumonia
#18
Elizabeth A Fitzpatrick, Dahui You, Bishwas Shrestha, David Siefker, Vivek S Patel, Nikki Yadav, Sridhar Jaligama, Stephania A Cormier
Pneumonia due to methicillin-resistant Staphylococcus aureus (MRSA) is a significant cause of morbidity and mortality in infants particularly following lower respiratory tract viral infections such as Respiratory Syncytial Virus (RSV). However, the mechanisms by which co-infection of infants by MRSA and RSV cause increased lung pathology are unknown. Because the infant immune system is qualitatively and quantitatively different from adults we developed a model of infant MRSA pneumonia which will allow us to investigate the effects of RSV co-infection on disease severity...
2017: PloS One
https://www.readbyqxmd.com/read/28060792/expression-of-x-linked-toll-like-receptor-4-signalling-genes-in-female-versus-male-neonates
#19
David N O'Driscoll, Chiara DeSanti, Paul J McKiernan, Victoria McEneaney, Eleanor J Molloy, Catherine M Greene
BACKGROUND: Male neonates display poorer disease prognosis and outcomes compared to females. Immune genes which exhibit higher expression in umbilical cord blood (UCB) of females may contribute to the female immune advantage during infection and inflammation. The aim of this study was to quantify expression of Toll-like receptor (TLR) 4 signalling genes encoded on the X-chromosome in UCB from term female versus male neonates. METHODS: UCB samples were collected from term neonates (n=26) born by elective Caesarean section and whole blood was collected from adults (n=20)...
January 6, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28059609/rotavirus-specific-maternal-antibodies-and-immune-response-to-rv3-bb-neonatal-rotavirus-vaccine-in-new-zealand
#20
Mee-Yew Chen, Carl D Kirkwood, Julie Bines, Daniel Cowley, Daniel Pavlic, Katherine J Lee, Francesca Orsini, Emma Watts, Graeme Barnes, Margaret Danchin
Background Maternal antibodies, acquired passively via placenta and/or breast milk, may contribute to the reduced efficacy of oral rotavirus vaccine observed in children in developing countries. This study aimed to investigate the effect of rotavirus specific maternal antibodies on the serum IgA response or stool excretion of vaccine virus after any dose of an oral rotavirus vaccine, RV3-BB, in parallel to a Phase IIa clinical trial conducted at Dunedin Hospital, New Zealand. At the time of the study rotavirus vaccines had not been introduced in New Zealand and the burden of rotavirus disease was evident...
January 6, 2017: Human Vaccines & Immunotherapeutics
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