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Neonatal immune

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https://www.readbyqxmd.com/read/28433652/ketamine-potentiates-oxidative-stress-and-influences-behaviour-and-inflammation-in-response-to-lipolysaccharide-lps-exposure-in-early-life
#1
Gislaine Z Réus, Lutiana R Simões, Gabriela D Colpo, Giselli Scaini, Jean P Oses, Jaqueline S Generoso, Alan R Prossin, Rima Kaddurah-Daouk, João Quevedo, Tatiana Barichello
Immune activation (IA) during the early neonatal period is a risk factor for the development of schizophrenia. Lipopolysaccharide (LPS) injected in neonates lead to behavioral and brain changes that persist to adult life. We investigated oxidative stress, levels of cytokines, and the locomotor activity of IA in a schizophrenia animal model in which neonatal male Wistar rats were administered with an injection of LPS (50 μg/kg) on postnatal day 3 and different doses of ketamine (5, 15 and 25 mg/kg) for 7 days during adulthood...
April 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28432664/human-perinatal-immunity-in-physiological-conditions-and-during-infection
#2
REVIEW
Gijs T J van Well, Leonie A Daalderop, Tim Wolfs, Boris W Kramer
The intrauterine environment was long considered sterile. However, several infectious threats are already present during fetal life. This review focuses on the postnatal immunological consequences of prenatal exposure to microorganisms and related inflammatory stimuli. Both the innate and adaptive immune systems of the fetus and neonate are immature, which makes them highly susceptible to infections. There is good evidence that prenatal infections are a primary cause of preterm births. Additionally, the association between antenatal inflammation and adverse neonatal outcomes has been well established...
December 2017: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/28430709/vitamin-d3-repressed-astrocyte-activation-following-lipopolysaccharide-stimulation-in-vitro-and-in-neonatal-rats
#3
Ke-Ping Jiao, Shao-Min Li, Wen-Yan Lv, Ming-Liang Jv, Hai-Yan He
Vitamin D3 has been reported to be an immunity modulator and high levels of vitamin D3 are correlated with a decreased risk for developing diseases in the central nervous system. Astrocytes are important immune cells and contribute toward inflammation during neurological diseases. The vitamin D receptor has been reported to be expressed in astrocytes; however, the effect of vitamin D3 on astrocyte activation has not been studied. Here, we found that lipopolysaccharide stimulation in astrocytes could enhance the expression of vitamin D receptor and Cyp27B1, which encodes the enzyme for converting vitamin D3 into its active form...
April 20, 2017: Neuroreport
https://www.readbyqxmd.com/read/28430654/alpha-ketoglutarate-suppresses-the-nf-%C3%AE%C2%BAb-mediated-inflammatory-pathway-and-enhances-the-pxr-regulated-detoxification-pathway
#4
Liuqin He, Huan Li, Niu Huang, Xihong Zhou, Junquan Tian, Tiejun Li, Jing Wu, Yanan Tian, Yulong Yin, Kang Yao
Alpha-ketoglutarate (AKG) is a critical nutritional factor in the maintenance of intestinal homeostasis. However, the relative mechanism of AKG has not been well understood. It was recently shown that the interaction between nuclear factor kappa B (NF-κB)-mediated inflammatory pathway and pregnane X receptor (PXR)-regulated detoxification pathway is a check and balance mechanism for keeping the homeostatic state of the intestine, preventing the onset of intestinal inflammation which may lead to cancer. In the current study we used lipopolysaccharide (LPS)-challenged piglet and intestinal porcine epithelial cells-J2 models to investigate the effects of dietary AKG supplementation on the intestinal immune system and PXR regulated target expression...
April 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28428831/cord-blood-hematopoietic-cells-from-preterm-infants-display-altered-dna-methylation-patterns
#5
Olivia M de Goede, Pascal M Lavoie, Wendy P Robinson
BACKGROUND: Premature infants are highly vulnerable to infection. This is partly attributable to the preterm immune system, which differs from that of the term neonate in cell composition and function. Multiple studies have found differential DNA methylation (DNAm) between preterm and term infants' cord blood; however, interpretation of these studies is limited by the confounding factor of blood cell composition. This study evaluates the epigenetic impact of preterm birth in isolated hematopoietic cell populations, reducing the concern of cell composition differences...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28428801/preconception-allergen-sensitization-can-induce-b10-cells-in-offspring-a-potential-main-role-for-maternal-igg
#6
Marília Garcia de Oliveira, Luana de Mendonça Oliveira, Aline Aparecida de Lima Lira, Fábio da Ressureição Sgnotto, Alberto José da Silva Duarte, Maria Notomi Sato, Jefferson Russo Victor
BACKGROUND: The mechanisms through which allergies can be inhibited after preconception immunization with allergens are not fully understood. We aimed to evaluate whether maternal immunization can induce a regulatory B (B10) cell population in offspring in concert with allergy inhibition. METHODS: C57BL/6 females were or were not immunized with OVA and were mated with normal WT males. Their offspring were evaluated at 3 days of age or 20 days after neonatal immunization...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28428425/neonatal-acquisition-of-clostridia-species-protects-against-colonization-by-bacterial-pathogens
#7
Yun-Gi Kim, Kei Sakamoto, Sang-Uk Seo, Joseph M Pickard, Merritt G Gillilland, Nicholas A Pudlo, Matthew Hoostal, Xue Li, Thomas D Wang, Taylor Feehley, Andrew T Stefka, Thomas M Schmidt, Eric C Martens, Shinji Fukuda, Naohiro Inohara, Cathryn R Nagler, Gabriel Núñez
The high susceptibility of neonates to infections has been assumed to be due to immaturity of the immune system, but the mechanism remains unclear. By colonizing adult germ-free mice with the cecal contents of neonatal and adult mice, we show that the neonatal microbiota is unable to prevent colonization by two bacterial pathogens that cause mortality in neonates. The lack of colonization resistance occurred when Clostridiales were absent in the neonatal microbiota. Administration of Clostridiales, but not Bacteroidales, protected neonatal mice from pathogen infection and abrogated intestinal pathology upon pathogen challenge...
April 21, 2017: Science
https://www.readbyqxmd.com/read/28428227/mechanisms-in-endocrinology-the-multiple-facets-of-gh-lessons-from-lifetime-untreated-isolated-gh-deficiency-due-to-ghrh-receptor-mutation
#8
Manuel Aguiar-Oliveira, Anita Ho Souza, Carla R Oliveira, Viviane C Campos, Luiz A Oliveira-Neto, Roberto Salvatori
Twenty years ago, we described a kindred of 105 individuals with isolated GH deficiency (IGHD) in Itabaianinha County, in Brazilian northeast, due to a homozygous mutation in the GH-releasing hormone receptor gene. These subjects exhibit markedly reduced GH responsiveness to stimulatory tests, and anterior pituitary hypoplasia. Serum concentrations of IGF-I, IGF binding protein type 3, and the acid-labile subunit are markedly reduced, with a lesser reduction of IGF-II. The most striking physical findings of these IGHD individuals are the proportionate short stature, doll facies, high-pitched voice, and visceral obesity with reduced fat free mass...
April 20, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28424287/protective-efficacy-of-formaldehyde-inactivated-whole-virus-vaccine-and-antivirals-in-a-murine-model-of-coxsackievirus-a10-infection
#9
Zhenjie Zhang, Zhaopeng Dong, Juan Li, Michael J Carr, Dongming Zhuang, Jianxing Wang, Yawei Zhang, Shujun Ding, Yigang Tong, Dong Li, Weifeng Shi
Coxsackievirus A10 (CVA10) is one of the major pathogens associated with hand, foot and mouth disease (HFMD). CVA10 infection can cause herpangina and viral pneumonia, which can be complicated by severe neurological sequelae. Morbidity and mortality of CVA10-associated HFMD has been increasing in recent years, particularly in the pan-Pacific region. There are limited studies however on the pathogenesis and immunology of CVA10-associated HFMD infections, and few antiviral drugs or vaccines have been reported...
April 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28423971/intrauterine-infection-immune-system-and-premature-birth
#10
Fernanda Rodrigues Helmo, Eduardo Arthur Rodovalho Alves, Renata Alves de Andrade Moreira, Viviane Oliveira Severino, Laura Penna Rocha, Maria Luíza Gonçalves Dos Reis Monteiro, Marlene Antônia Dos Reis, Renata Margarida Etchebehere, Juliana Reis Machado, Rosana Rosa Miranda Corrêa
Preterm birth accounts for nearly one million deaths among children under five years of age, and although its etiopathogenesis is not fully elucidated, ascending intrauterine infection and fetal inflammatory response seem to be the main triggers. The intense inflammatory response mediated by IL-1β, TNF-α, PAF, IFN-γ and IL-6, PGE2 and MMP-1 and MMP-9 causes fetal membrane damage and rupture, increased uterine contractions and biochemical and structural changes in the cervix. Furthermore, preterm neonates have deficient innate and adaptive immune responses characterized by reduced levels of IgG, opsonization and phagocytosis, as well as increased activation of Th1 cells in relation to Th2 cells...
April 20, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28419823/genetic-aspects-of-auto-immune-profiles-of-healthy-chickens
#11
Henk K Parmentier, Priscilla S van der Vaart, Mike G B Nieuwland, Huub F J Savelkoul
Auto-antibody profiles binding liver antigens differed between chicken lines divergently selected for specific antibody responses to SRBC, and were affected by ageing suggesting both genetic and environmental effects. Presence and levels of IgM and IgG antibodies binding chicken liver cell lysate (CLL) fragments in plasma at 5 weeks of age from 10 individual full sibs and their parents from 5 Hsrbc and 5 Lsrbc line families was studied to reveal genetic relations. Non-genetic maternal effects were studied by comparing auto-antibody profiles of 36 weeks old hens from 2 other unrelated lines with the profiles from their chicks at hatch...
April 15, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28418291/virulence-analysis-of-bacillus-cereus-isolated-after-death-of-preterm-neonates-nice-france-2013
#12
Romain Lotte, Anne-Laure Hérissé, Yasmina Berrouane, Laurène Lotte, Florence Casagrande, Luce Landraud, Sabine Herbin, Nalini Ramarao, Laurent Boyer, Raymond Ruimy
After the deaths of 2 preterm neonates with Bacillus cereus systemic infection in the same intensive care unit, we investigated the pathogenic potential of this bacterium. Genetic and virulence analysis indicated the neonates were infected with 2 different strains with a virulence potential similar to environmental strains, indicating likely patient immune response failure.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28416607/human-milk-oligosaccharides-inhibit-growth-of-group-b-streptococcus
#13
Ann E Lin, Chloe A Autran, Alexandra Szyszka, Tamara Escajadillo, Mia Huang, Kamil Godula, Anthony R Prudden, Geert-Jan Boons, Amanda L Lewis, Kelly S Doran, Victor Nizet, Lars Bode
Streptococcus agalactiae (group B Streptococcus; GBS) is a leading cause of invasive bacterial infections in newborns, typically acquired vertically during childbirth secondary to maternal vaginal colonization. Human milk oligosaccharides (HMOs) have important nutritional and biological activities that guide development of the infant's immune system and shape the composition of normal gut microbiota. In this manner, HMOs help protect against pathogen colonization and reduce risk of infection. In the course of our studies of HMO-microbial interactions, we unexpectedly uncovered a novel HMO property to directly inhibit the growth of GBS, independent of host immunity...
April 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28416430/-extracorporeal-membrane-oxygenation-in-critically-ill-neonates-and-children
#14
J Rambaud, J Guilbert, I Guellec, S Jean, A Durandy, M Demoulin, A Amblard, R Carbajal, P-L Leger
Extracorporeal membrane oxygenation is used as a last resort during neonatal and pediatric resuscitation in case of refractory circulatory or respiratory failure under maximum conventional therapies. Different types of ECMO can be used depending on the initial failure. The main indications for ECMO are refractory respiratory failure (acute respiratory distress syndrome, status asthmaticus, severe pneumonia, meconium aspiration syndrome, pulmonary hypertension) and refractory circulatory failure (cardiogenic shock, septic shock, refractory cardiac arrest)...
April 14, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28414605/use-of-a-novel-surgical-approach-for-treatment-of-complete-bilateral-membranous-choanal-atresia-in-an-alpaca-cria
#15
Karine Pader, Patrick M Burns, Anne-Claire Brisville, Marjolaine Rousseau, Laurent Blond, Geoffrey Truchetti, Hélène Lardé, Catherine Lapointe, David Francoz
CASE DESCRIPTION A 4-hour-old 6.3-kg (13.9-lb) female alpaca cria was evaluated because of severe respiratory distress and difficulty nursing since birth. CLINICAL FINDINGS The cria had open-mouth breathing and cyanotic membranes, with no airflow evident from either nostril. Supplemental oxygen was delivered, and the patient was anesthetized and intubated orotracheally; a CT evaluation of the head confirmed bilateral membranous obstruction of the nasal cavities, consistent with complete bilateral choanal atresia...
May 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28412547/intracellular-dna-sensing-pathway-of-cgas-cgamp-is-decreased-in-human-newborns-and-young-children
#16
Zhan-Sheng Wang, Yu-Lu Liu, Nan Mi, Dao-Yun Duan
Newborns are highly susceptible to DNA virus infections, which may result from the characteristics of neonatal innate immune systems. Here we analyzed for the first time the development of innate immune sensing and signaling of intracellular DNA virus infection in human newborns and young children. Both mRNA and protein expression of cGAS, an intracellular DNA sensor, were shown to be significantly reduced in neonatal peripheral blood mononuclear cells (PBMCs). In addition, cGAS expression in neonatal PBMCs could be induced upon herpes simplex virus type 1 (HSV-1) or interferon-α (IFNα) stimulation...
April 13, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28410545/lps-stimulation-of-cord-blood-reveals-a-newborn-specific-neutrophil-transcriptomic-response-and-cytokine-production
#17
Brittany Mathias, Juan C Mira, Jonathan P Rehfuss, Jaimar C Rincon, Ricardo Ungaro, Dina C Nacionales, M Cecilia Lopez, Henry V Baker, Lyle L Moldawer, Shawn D Larson
BACKGROUND: The neonatal innate immune system differs to microbial infection both quantitatively and qualitatively when compared with adults. Here, we provide the first genome-wide ex-vivo expression profile of umbilical cord blood (UCB) neutrophils from full-term infants prior to and in response to whole-blood lipopolysaccharide (LPS) stimulation. Additionally, we provide cytokine expression prior to and following LPS stimulation. The genomic expression and cytokine profile are compared with LPS-stimulated whole blood from healthy adult subjects (HC)...
May 2017: Shock
https://www.readbyqxmd.com/read/28409503/food-restriction-affects-maternal-investment-but-not-neonate-phenotypes-in-a-viviparous-lizard
#18
Yang Wang, Zhi-Gao Zeng, Liang Ma, Shu-Ran Li, Wei-Guo Du
Food availability significantly affects an animal's energy metabolism, and thus its phenotype, survival, and reproduction. Maternal and offspring responses to food conditions are critical for understanding population dynamics and life-history evolution of a species. In this study, we conducted food manipulation experiments in field enclosures to identify the effect of food restriction on female reproductive traits and postpartum body condition, as well as on hatchling phenotypes, in a lacertid viviparous lizard from the Inner Mongolian desert steppe of China...
March 18, 2017: Zoological Research
https://www.readbyqxmd.com/read/28408118/a-novel-combined-vaccine-based-on-monochimeric-vlp-co-displaying-multiple-conserved-epitopes-against-enterovirus-71-and-varicella-zoster-virus
#19
Yangtao Wu, Rui Zhu, Longfa Xu, Yongchao Li, Shuxuan Li, Hai Yu, Shaowei Li, Hua Zhu, Tong Cheng, Ningshao Xia
Chicken pox and hand, foot and mouth disease (HFMD) are two major infectious diseases that mainly affect infants and children, causing significant morbidity annually. Varicella-zoster virus (VZV) and enterovirus 71 (EV71), respectively, are the principal epidemic pathogens causing these two diseases. To investigate the possibility of developing a novel combined vaccine to prevent chicken pox and HFMD, we constructed three chimeric virus-like particles (VLPs) (termed HBc-V/1/2, HBc-2/V/1 and HBc-1/2/V) based on the hepatitis B core antigen (HBc) carrier that display epitopes derived from VZV-gE, EV71-VP1, and EV71-VP2 in a varied tandem manner...
April 10, 2017: Vaccine
https://www.readbyqxmd.com/read/28402808/eliminating-maternal-and-neonatal-tetanus-and-closing-the-immunity-gap
#20
Craig Burgess, Francois Gasse, Robert Steinglass, Ahmadu Yakubu, Azhar Abid Raza, Kari Johansen
No abstract text is available yet for this article.
April 8, 2017: Lancet
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