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https://www.readbyqxmd.com/read/28715646/l-form-bacteria-cohabitants-in-human-blood-significance-for-health-and-diseases
#1
Nadya D Markova
From a historical perspective, intriguing assumptions about unknown "live units" in human blood have attracted the attention of researchers, reflecting their desire to define a new class of microorganisms. Thus, the concept of "blood microbiota" brings about many questions about the nature, origin, and biological significance of the "unusual microbial cohabitants" in human blood. In contrast to current views that bloodstream in healthy humans is sterile, the hypothesis about the existence of microbes as L-forms (cell wall deficient bacteria) in human blood has evolved on the basis of known facts about their unique biology, as observed in our studies and those of other authors...
May 2017: Discovery Medicine
https://www.readbyqxmd.com/read/28714605/epigenetic-alterations-and-prenatal-maternal-depression
#2
REVIEW
Zsofia Nemoda, Moshe Szyf
Major depressive disorder of the mother affects 6 to 17% of pregnancies worldwide and can lead to negative outcomes, such as preterm delivery and later mental health problems of the child. It has been proposed that developmental programming has long-lasting effects in the offspring that might be mediated by epigenetic mechanisms, such as DNA methylation. Altered stress regulation or impaired immunological function of the mother can potentially affect DNA methylation processes of the fetus, changing gene expression levels in utero...
July 17, 2017: Birth defects research
https://www.readbyqxmd.com/read/28713338/investigation-of-och1-in-the-virulence-of-candida-parapsilosis-using-a-new-neonatal-mouse-model
#3
Katalin Csonka, Máté Vadovics, Annamária Marton, Csaba Vágvölgyi, Erik Zajta, Adél Tóth, Renáta Tóth, Csaba Vizler, László Tiszlavicz, Héctor M Mora-Montes, Attila Gácser
Candida parapsilosis is an opportunistic human fungal pathogen that poses a serious threat to low birth weight neonates, particularly at intensive care units. In premature infants, the distinct immune responses to Candida infections are not well understood. Although several in vivo models exist to study systemic candidiasis, only a few are available to investigate dissemination in newborns. In addition, the majority of related studies apply intraperitoneal infection rather than intravenous inoculation of murine infants that may be less efficient when studying systemic invasion...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28694805/primary-immunodeficiency-diseases-in-highly-consanguineous-populations-from-middle-east-and-north-africa-epidemiology-diagnosis-and-care
#4
REVIEW
Hamoud Al-Mousa, Bandar Al-Saud
Middle East and North Africa region (MENA) populations are of different ethnic origins. Consanguineous marriages are common practice with an overall incidence ranging between 20 and 50%. Primary immunodeficiency diseases (PIDs) are a group of heterogeneous genetic disorders caused by defects in the immune system that predisposes patients to recurrent infections, autoimmune diseases, and malignancies. PIDs are more common in areas with high rates of consanguineous marriage since most have an autosomal recessive mode of inheritance...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28685270/tolerance-and-immunity-to-pathogens-in-early-life-insights-from-hbv-infection
#5
REVIEW
Michelle Hong, Antonio Bertoletti
Immunity is not static but varies with age. The immune system of a newborn infant is not "defective" or "immature." Rather, there are distinct features of innate and adaptive immunity from fetal life to adulthood, which may alter the susceptibility of newborn infants to infections compared to adults. Increased protection to certain infectious diseases during early life may benefit from a dampened immune response as a result of decreased immune pathology. This concept may offer an alternative interpretation of the different pathological manifestations clinically observed in hepatitis B virus (HBV)-infected patients during the natural history of infection...
July 6, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28679960/preexisting-antibodies-can-protect-against-congenital-cytomegalovirus-infection-in-monkeys
#6
Cody S Nelson, Diana Vera Cruz, Dollnovan Tran, Kristy M Bialas, Lisa Stamper, Huali Wu, Margaret Gilbert, Robert Blair, Xavier Alvarez, Hannah Itell, Meng Chen, Ashlesha Deshpande, Flavia Chiuppesi, Felix Wussow, Don J Diamond, Nathan Vandergrift, Mark R Walter, Peter A Barry, Michael Cohen-Wolkowiez, Katia Koelle, Amitinder Kaur, Sallie R Permar
Human cytomegalovirus (HCMV) is the most common congenital infection and a known cause of microcephaly, sensorineural hearing loss, and cognitive impairment among newborns worldwide. Natural maternal HCMV immunity reduces the incidence of congenital infection, but does not prevent the disease altogether. We employed a nonhuman primate model of congenital CMV infection to investigate the ability of preexisting antibodies to protect against placental CMV transmission in the setting of primary maternal infection and subsequent viremia, which is required for placental virus exposure...
July 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28679745/maternal-antiviral-immunoglobulin-accumulates-in-neural-tissue-of-neonates-to-prevent-hsv-neurological-disease
#7
Yike Jiang, Chaya D Patel, Richard Manivanh, Brian North, Iara M Backes, David A Posner, Francesca Gilli, Andrew R Pachner, Lananh N Nguyen, David A Leib
While antibody responses to neurovirulent pathogens are critical for clearance, the extent to which antibodies access the nervous system to ameliorate infection is poorly understood. In this study on herpes simplex virus 1 (HSV-1), we demonstrate that HSV-specific antibodies are present during HSV-1 latency in the nervous systems of both mice and humans. We show that antibody-secreting cells entered the trigeminal ganglion (TG), a key site of HSV infection, and persisted long after the establishment of latent infection...
July 5, 2017: MBio
https://www.readbyqxmd.com/read/28669620/prenatal-tdap-immunization-and-risk-of-maternal-and-newborn-adverse-events
#8
J Bradley Layton, Anne M Butler, Dongmei Li, Kim A Boggess, David J Weber, Leah J McGrath, Sylvia Becker-Dreps
Many countries recommend combined tetanus toxoid, reduced diphtheria toxoid and acellular pertussis immunization (Tdap) during pregnancy to stimulate transplacental transmission of pertussis antibodies to newborns. The immune system can be altered during pregnancy, potentially resulting in differing immunization risks in pregnant women. The safety of widespread Tdap immunization during pregnancy needs to be established. Our objective was to assess whether prenatal Tdap immunization was associated with adverse birth outcomes, and to evaluate the effect of timing of Tdap administration on these outcomes...
June 29, 2017: Vaccine
https://www.readbyqxmd.com/read/28668447/effect-of-cryopreservation-on-viability-and-growth-efficiency-of-stromal-epithelial-cells-derived-from-neonatal-human-thymus
#9
Valentin P Shichkin, Oleksandr I Gorbach, Olga A Zuieva, Nataliia I Grabchenko, Irina A Aksyonova, Boris M Todurov
The thymus is the major site of T lymphocyte generation and so is critical for a functional adaptive immune system. Since, thymectomy is a component of neonatal surgery for congenital heart diseases, it provides great potential for collection and storage of thymic tissue for autologous transplantation. However, specific investigation into the optimum parameters for thymic tissue cryopreservation have not been conducted. In this research, we evaluated the effect of different cryoprotective media compositions, which included penetrating (Me2SO, glycerol) and non-penetrating (dextran-40, sucrose, hydroxyethyl starch) components, on the viability and functionality of frozen-thawed human thymic samples to select an optimal cryoprotective medium suitable for long-term storage of thymic tissue and a stromal-epithelial enriched population...
June 28, 2017: Cryobiology
https://www.readbyqxmd.com/read/28667414/indoor-airborne-fungal-pollution-in-newborn-units-in-turkey
#10
Rasime Demirel, Burhan Sen, Duygu Kadaifciler, Aysegul Yoltas, Suzan Okten, Evrim Ozkale, Derya Berikten, Robert A Samson, Alev Haliki Uztan, Neriman Yilmaz, Ozlem Abaci Gunyar, Halide Aydogdu, Ahmet Asan, Merih Kivanc, Soner Ozdil, Erhan Sakartepe
Pathogenic and/or opportunistic fungal species are major causes of nosocomial infections, especially in controlled environments where immunocompromised patients are hospitalized. Indoor fungal contamination in hospital air is associated with a wide range of adverse health effects. Regular determination of fungal spore counts in controlled hospital environments may help reduce the risk of fungal infections. Because infants have inchoate immune systems, they are given immunocompromised patient status. The aim of the present study was to evaluate culturable airborne fungi in the air of hospital newborn units in the Thrace, Marmara, Aegean, and Central Anatolia regions of Turkey...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28657764/two-cases-of-the-variant-rhd-dau5-allele-associated-with-maternal-alloanti-d
#11
Jennifer A Duncan, Susan Nahirniak, Rodrigo Onell, Gwen Clarke
Rh is a complex blood group system with diverse genotypes that may encode weak and partial D variants. Standard serologic analysis may identify clinically significant D variants as D+; nevertheless, individuals with these D variants should be managed as D- patients to prevent antibody formation to absent D epitopes. Variant identification is necessary during pregnancy to allow for timely and appropriate Rh immune globulin (RhIG) prophylaxis for hemolytic disease of the fetus and newborn (HDFN) as D alloimmunization can occur with some D variants...
June 2017: Immunohematology
https://www.readbyqxmd.com/read/28656697/hypoxia-ischemia-is-not-an-antecedent-of-most-preterm-brain-damage-the-illusion-of-validity
#12
REVIEW
Floyd Gilles, Pierre Gressens, Olaf Dammann, Alan Leviton
Brain injury in preterm newborn infants is often attributed to hypoxia-ischemia even when neither hypoxia nor ischemia is documented, and many causative speculations are based on the same assumption. We review human and animal study contributions with their strengths and limitations, and conclude that - despite all the work done in human fetal neuropathology and developmental models in animals - the evidence remains unconvincing that hypoxemia, in the fetus or newborn infant, contributes appreciably to any encephalopathy of prematurity...
June 28, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28643627/bifidobacteria-and-their-health-promoting-effects
#13
Claudio Hidalgo-Cantabrana, Susana Delgado, Lorena Ruiz, Patricia Ruas-Madiedo, Borja Sánchez, Abelardo Margolles
Bifidobacteria are members of the intestinal microbiota of mammals and other animals, and some strains are able to exert health-promoting effects. The genus Bifidobacterium belongs to the Actinobacteria phylum. Firmicutes, Bacteroidetes, and Actinobacteria constitute the most abundant phyla in the human intestinal microbiota, Firmicutes and Bacteroidetes being predominant in adults, and Actinobacteria in breast-fed infants, where bifidobacteria can reach levels higher than 90% of the total bacterial population...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28620404/oral-administration-of-a-seed-based-bivalent-rotavirus-vaccine-containing-vp6-and-nsp4-induces-specific-immune-responses-in-mice
#14
Hao Feng, Xin Li, Weibin Song, Mei Duan, Hong Chen, Tao Wang, Jiangli Dong
Rotavirus is the leading cause of severe diarrheal disease among newborns. Plant-based rotavirus vaccines have been developed in recent years and have been proven to be effective in animal models. In the present study, we report a bivalent vaccine candidate expressing rotavirus subunits VP6 and NSP4 fused with the adjuvant subunit B of E. coli heat-labile enterotoxin (LTB) in maize seeds. The RT-PCR and Western blot results showed that VP6 and LTB-NSP4 antigens were expressed and accumulated in maize seeds...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28598702/a-safe-and-efficient-bcg-vectored-vaccine-to-prevent-the-disease-caused-by-the-human-respiratory-syncytial-virus
#15
Emma Rey-Jurado, Jorge Soto, Nicolás Gálvez, Alexis M Kalergis
The human Respiratory Syncytial Virus (hRSV) causes lower respiratory tract infections including pneumonia and bronchiolitis. Such infections also cause a large number of hospitalizations and affects mainly newborns, young children and the elderly worldwide. Symptoms associated with hRSV infection are due to an exacerbated immune response characterized by low levels of IFN-γ, recruitment of neutrophils and eosinophils to the site of infection and lung damage. Although hRSV is a major health problem, no vaccines are currently available...
June 9, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28596951/early-life-host-microbiome-interphase-the-key-frontier-for-immune-development
#16
REVIEW
Nelly Amenyogbe, Tobias R Kollmann, Rym Ben-Othman
Human existence can be viewed as an "animal in a microbial world." A healthy interaction of the human host with the microbes in and around us heavily relies on a well-functioning immune system. As development of both the microbiota and the host immune system undergo rapid changes in early life, it is not surprising that even minor alterations during this co-development can have profound consequences. Scrutiny of existing data regarding pre-, peri-, as well as early postnatal modulators of newborn microbiota indeed suggest strong associations with several immune-mediated diseases with onset far beyond the newborn period...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28593775/-the-importance-of-maternal-microbiome-in-pregnancy
#17
J Záhumenský, J Hederlingová, P Pšenková
OBJECTIVE: To bring the most actual published findings of the influence of maternal microbiome on the development of pregnancy and possibilities of its adjusting. DESIGN: Review. SETTING: 2nd Department of Gyneacology and Obstetrics of the Faculty of Medicine and the University Hospital, Bratislava. METHODS: Review of the literature. CONCLUSIONS: The appearance of microbes on various body surface areas determines the overall health status of the individual in significant manner...
2017: Ceská Gynekologie
https://www.readbyqxmd.com/read/28592938/thermal-burn-in-a-30-minute-old-newborn-report-on-the-youngest-patient-with-iatrogenic-burn-injury
#18
L Abboud, G Ghanimeh
Burns in infants are rare. The majority of neonatal burns occur in the hospital setting. The immaturity of their immune system, their fragile and thin skin, difficulties in resuscitation, engraftment paucity limited by donor sites, and long-term complications make taking care of burned newborns extremely difficult. We present the case of a newborn burned 30 minutes after his birth over a total body surface of 35%, when the hot water bottle used in the hospital accidentally burst. This is the earliest iatrogenic burn in a newborn reported to date...
March 31, 2017: Annals of Burns and Fire Disasters
https://www.readbyqxmd.com/read/28585307/maternal-antibodies-against-tetanus-toxoid-do-not-inhibit-potency-of-antibody-responses-to-autologous-antigen-in-newborn-rhesus-monkeys
#19
Ronald S Veazey, Yingjie Lu, Huanbin Xu, Widade Ziani, Lara A Doyle-Meyers, Marion S Ratterree, Xiaolei Wang
BACKGROUND: Our previous study suggested newborns have competent immune systems with the potential to respond to foreign antigens and vaccines. In this study, we examined infant immune responses to tetanus toxoid (TT) vaccination in the presence of maternal antibody to TT. METHODS: We examined changes in plasma levels of tetanus toxoid-specific IgG1 (anti-TT IgG1) in a total of eight infant rhesus macaques from birth through 6 months of age using a commercial Monkey Anti-TT IgG1 ELISA kit...
June 6, 2017: Journal of Medical Primatology
https://www.readbyqxmd.com/read/28553653/not-only-glycaemic-but-also-other-metabolic-factors-affect-t-regulatory-cell-counts-and-proinflammatory-cytokine-levels-in-women-with-type-1-diabetes
#20
Katerina Stechova, Jana Sklenarova-Labikova, Tereza Kratzerova, Pavlina Pithova, Dominik Filipp
Type 1 diabetic (T1D) patients suffer from insulinopenia and hyperglycaemia. Studies have shown that if a patient's hyperglycaemic environment is not compensated, it leads to complex immune dysfunctions. Similarly, T1D mothers with poor glycaemic control exert a negative impact on the immune responses of their newborns. However, questions concerning the impact of other metabolic disturbances on the immune system of T1D mothers (and their newborns) have been raised. To address these questions, we examined 28 T1D women in reproductive age for the relationship between various metabolic, clinical, and immune parameters...
2017: Journal of Diabetes Research
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