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neonatal immune response

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https://www.readbyqxmd.com/read/28432664/human-perinatal-immunity-in-physiological-conditions-and-during-infection
#1
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
#2
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/28428227/mechanisms-in-endocrinology-the-multiple-facets-of-gh-lessons-from-lifetime-untreated-isolated-gh-deficiency-due-to-ghrh-receptor-mutation
#3
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
#4
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
#5
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
#6
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
#7
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/28410545/lps-stimulation-of-cord-blood-reveals-a-newborn-specific-neutrophil-transcriptomic-response-and-cytokine-production
#8
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
#9
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
#10
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/28402153/maternal-fetal-transmission-of-zika-virus-routes-and-signals-for-infection
#11
Bin Cao, Michael S Diamond, Indira U Mysorekar
The emerging mosquito-borne virus, Zika virus (ZIKV), has been causally associated with adverse pregnancy and neonatal outcomes, including miscarriage, microcephaly, serious brain abnormalities, and other birth defects indicative of a congenital ZIKV syndrome. In this review, we highlight work from human and animal studies on routes of infection in pregnancy that lead to adverse fetal and neonatal outcomes. A number of innate and adaptive immune mechanisms and signaling molecules that may have key roles in ZIKV infection pathogenesis are discussed along with putative viral entry pathways...
April 12, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/28396664/unraveling-the-differences-between-gram-positive-and-gram-negative-probiotics-in-modulating-protective-immunity-to-enteric-infections
#12
REVIEW
Sukumar Kandasamy, Anastasia N Vlasova, David D Fischer, Kuldeep S Chattha, Lulu Shao, Anand Kumar, Stephanie N Langel, Abdul Rauf, Huang-Chi Huang, Gireesh Rajashekara, Linda J Saif
The role of intestinal microbiota and probiotics in prevention and treatment of infectious diseases, including diarrheal diseases in children and animal models, is increasingly recognized. Intestinal commensals play a major role in development of the immune system in neonates and in shaping host immune responses to pathogens. Lactobacilli spp. and Escherichia coli Nissle 1917 are two probiotics that are commonly used in children to treat various medical conditions including human rotavirus diarrhea and inflammatory bowel disease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28383532/the-immature-platelet-fraction-creating-neonatal-reference-intervals-and-using-these-to-categorize-neonatal-thrombocytopenias
#13
B C MacQueen, R D Christensen, E Henry, A M Romrell, T J Pysher, S T Bennett, M C Sola-Visner
OBJECTIVE: The immature platelet fraction (IPF) is a laboratory measurement analogous to the reticulocyte count, but reflecting the thrombopoietic state. Similar to a reticulocyte count, it can be expressed as a percent (IPF%=percent of platelets that are immature) or as an absolute number per μl blood; the immature platelet count (IPC=IPF% × platelets per μl of blood). STUDY DESIGN: Using a retrospective analysis of de-identified data from non-thrombocytopenic neonates, we created reference intervals for IPF% and IPC...
April 6, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28376744/effects-of-pseudomonas-aeruginosa-and-streptococcus-mitis-mixed-infection-on-tlr4-mediated-immune-response-in-acute-pneumonia-mouse-model
#14
Chao Song, Hongdong Li, Yunhui Zhang, Jialin Yu
BACKGROUND: Our previous research on the diversity of microbiota in the endotracheal tubes (ETTs) of neonates in the neonatal intensive care unit found that Pseudomonas aeruginosa (P. aeruginosa) and Streptococcus mitis (S. mitis) were the dominant bacteria on the ETT surface and the existence of S. mitis could promote biofilm formation and pathogenicity of P. aeruginosa. Toll-like receptor 4 (TLR4), which has been widely detected on the surface of airway epithelial cells, is the important component of the innate immune system...
April 4, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28375554/inflammatory-responses-to-influenza-vaccination-at-the-extremes-of-age
#15
Jacqueline U McDonald, Ziyun Zhong, Helen T Groves, John S Tregoning
Age affects the immune response to vaccination, with individuals at the extremes of age responding poorly. The initial inflammatory response to antigenic materials shapes the subsequent adaptive response and so understanding is required about the effect of age on the profile of acute inflammatory mediators. In this study we measured the local and systemic inflammatory response after influenza vaccination or infection in neonatal, young adult and aged mice. Mice were immunised intramuscularly with inactivated influenza vaccine with and without the adjuvant MF59 and then challenged with H1N1 influenza...
April 4, 2017: Immunology
https://www.readbyqxmd.com/read/28374110/htlv-1-infection-and-neuropathogenesis-in-the-context-of-rag1-%C3%AE-c-rag1-hu-and-blt-mice
#16
Rashida Ginwala, Breanna Caruso, Zafar K Khan, Ajinkya Pattekar, Glen M Chew, Michael J Corley, Ronak Loonawat, Steven Jacobson, Sreesha Sreedhar, Lishomwa C Ndhlovu, Pooja Jain
To date, the lack of a suitable small animal model has hindered our understanding of Human T-cell lymphotropic virus (HTLV)-1 chronic infection and associated neuropathogenesis defined as HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). The host immune response plays a critical role in the outcome of HTLV-1 infection, which could be better tested in the context of humanized (hu) mice. Thus, we employ here the Balb/c-Rag1(-/-)γc(-/-) or Rag1 as well as Bone marrow-Liver-Thymic (BLT) mouse models for engraftment of human CD34(+) hematopoietic stem cells...
April 4, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28369855/in-vivo-activation-of-invariant-natural-killer-t-cells-induces-systemic-and-local-alterations-in-t-cell-subsets-prior-to-preterm-birth
#17
Nardhy Gomez-Lopez, Roberto Romero, Marcia Arenas-Hernandez, George Schwenkel, Derek St Louis, Sonia S Hassan, Tara N Mial
Preterm birth, the leading cause of neonatal morbidity and mortality worldwide, is frequently preceded by spontaneous preterm labor, a syndrome of multiple etiologies. Pathological inflammation is causally linked to spontaneous preterm labor. Indeed, direct activation of invariant natural killer T (iNKT) cells via α-galactosylceramide induces preterm labor/birth largely by initiating systemic and local (i.e., decidua and myometrium) innate immune responses. Herein, we investigated whether iNKT-cell activation altered local and systemic T-cell subsets...
April 2, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28367457/comparative-assessment-of-cytokine-pattern-in-early-and-late-onset-of-neonatal-sepsis
#18
Kh S Khaertynov, S V Boichuk, S F Khaiboullina, V A Anokhin, A A Andreeva, V C Lombardi, M A Satrutdinov, E A Agafonova, A A Rizvanov
Neonatal sepsis is a significant health issue associated with high mortality. Immune responses associated with neonatal sepsis, such as proinflammatory cytokine production, are believed to play a central role in the pathogenesis of this disease. In the present study, serum levels of the proinflammatory cytokines TNF-α, IL1-β, and IL-6 and the anti-inflammatory cytokines IL-4 and IL-10 were evaluated for 25 subjects with neonatal sepsis. We observed that subjects with late onset of sepsis (LOS), as well as those with early onset of sepsis (EOS), had a substantial increase in serum TNF-α...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28363939/nasopharyngeal-microbiome-in-premature-infants-and-stability-during-rhinovirus-infection
#19
Geovanny F Perez, Marcos Pérez-Losada, Natalia Isaza, Mary C Rose, Anamaris M Colberg-Poley, Gustavo Nino
RATIONALE: The nasopharyngeal (NP) microbiota of newborns and infants plays a key role in modulating airway inflammation and respiratory symptoms during viral infections. Premature (PM) birth modifies the early NP environment and is a major risk factor for severe viral respiratory infections. However, it is currently unknown if the NP microbiota of PM infants is altered relative to full-term (FT) individuals. OBJECTIVES: To characterize the NP microbiota differences in preterm and FT infants during rhinovirus (RV) infection...
March 31, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28362692/breast-milk-tgf%C3%AE-is-associated-with-neonatal-gut-microbial-composition
#20
Alexandra R Sitarik, Kevin R Bobbitt, Suzanne L Havstad, Kei E Fujimura, Albert M Levin, Edward M Zoratti, Haejin Kim, Kimberley J Woodcroft, Ganesa Wegienka, Dennis R Ownby, Christine L M Joseph, Susan V Lynch, Christine C Johnson
OBJECTIVES: Breast milk is a complex bioactive fluid that varies across numerous maternal and environmental conditions. While breastfeeding is known to impact neonatal gut microbiome, the milk components responsible for this effect are not well-characterized. Given the wide range of immunological activity breast milk cytokines engage in, we investigated three essential breast milk cytokines and their association with early life gut microbiota. METHODS: A total of 52 maternal-child pairs were drawn from a racially diverse birth cohort based in Detroit, Michigan...
March 30, 2017: Journal of Pediatric Gastroenterology and Nutrition
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