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https://www.readbyqxmd.com/read/28346927/microbiota-in-functional-gastrointestinal-disorders-in-infancy-implications-for-management
#1
Thomas R Abrahamsson, Richard Y Wu, Philip M Sherman
The complex and diverse intestinal microbiome is recognized as important in promoting human health. An altered gut microflora, referred to as dysbiosis, is increasingly recognized as having an etiologic role in a variety of conditions, including functional gastrointestinal disorders: colic in infants and irritable bowel syndrome in older children. Probiotics are defined as live microorganisms that, if ingested in sufficient amounts, restore microbial homeostasis and have a benefit on health. Randomized controlled trials indicate that probiotics can be effective in a variety of intestinal conditions, including colic and irritable bowel syndrome...
2017: Nestlé Nutrition Institute Workshop Series
https://www.readbyqxmd.com/read/28346849/clostridium-perfringens-type-a-isolates-of-animal-origin-with-decreased-susceptibility-to-metronidazole-show-extensive-genetic-diversity
#2
Sergio Álvarez-Pérez, José L Blanco, Marta E García
Metronidazole is a first-line drug for the treatment of human infections caused by anaerobic bacteria. Although most Clostridium perfringens isolates are susceptible to metronidazole, a number of strains with decreased susceptibility have been obtained in clinical and environmental surveys. However, little is known yet about the toxinotype and genetic diversity of metronidazole-resistant C. perfringens strains. We tested for susceptibility to metronidazole and assessed the toxigenic status and amplified fragment length polymorphism (AFLP) diversity of a collection of 80 C...
March 27, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28346817/the-psychosocial-work-environment-is-associated-with-risk-of-stroke-at-working-age
#3
Katarina Jood, Nadine Karlsson, Jennie Medin, Hélène Pessah-Rasmussen, Per Wester, Kerstin Ekberg
Objective The aim of this study was to explore the relation between the risk of first-ever stroke at working age and psychological work environmental factors. Methods A consecutive multicenter matched 1:2 case-control study of acute stroke cases (N=198, age 30-65 years) who had been working full-time at the time of their stroke and 396 sex- and age-matched controls. Stroke cases and controls answered questionnaires on their psychosocial situation during the previous 12 months. The psychosocial work environment was assessed using three different measures: the job-control-demand model, the effort-reward imbalance (ERI) score, and exposures to conflict at work...
March 27, 2017: Scandinavian Journal of Work, Environment & Health
https://www.readbyqxmd.com/read/28346815/improvement-of-identification-methods-for-honeybee-specific-lactic-acid-bacteria-future-approaches
#4
Sepideh Lamei, Yue O O Hu, Tobias C Olofsson, Anders F Andersson, Eva Forsgren, Alejandra Vásquez
Honeybees face many parasites and pathogens and consequently rely on a diverse set of individual and group-level defenses to prevent disease. The crop microbiota of Apis mellifera, composed of 13 Lactic Acid Bacterial (LAB) species within the genera Lactobacillus and Bifidobacterium, form a beneficial symbiotic relationship with each other and the honeybee to protect their niche and their host. Possibly playing a vital role in honeybee health, it is important that these honeybee specific Lactic Acid Bacterial (hbs-LAB) symbionts can be correctly identified, isolated and cultured, to further investigate their health promoting properties...
2017: PloS One
https://www.readbyqxmd.com/read/28346793/early-immune-responses-to-marek-s-disease-vaccines
#5
Mohammad Heidari, Dan Wang, Shuhong Sun
Marek's disease virus (MDV), a highly cell-associated lymphotropic α-herpesvirus, is the causative agent of Marek's disease (MD) in domestic chickens. MDV replicates in chicken cells and establishes a latent infection within CD4(+) T cells. Although MD vaccines have been in use for several decades, the exact mechanism of vaccine-induced protection is unclear. It is believed that the innate immune system plays a role in vaccine-induced immunity against pathogenic strains of MDV. To shed light on the possible function of the innate immunity in vaccine-mediated protection, we investigated the effect of vaccination, Rispens/CVI988, on the activation of cellular components of the innate immune system by analyzing the expression pattern of select immune-related genes in the cecal tonsils (CT) and duodenum of two MD-susceptible and MD-resistant chicken lines at 3, 5, and 10 days postvaccination (dpv)...
March 27, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28346546/antimicrobial-susceptibility-and-multilocus-sequence-typing-of-mycoplasma-capricolum-subsp-capricolum
#6
Juan Tatay-Dualde, Miranda Prats-van der Ham, Christian de la Fe, Ana Paterna, Antonio Sánchez, Juan Carlos Corrales, Antonio Contreras, Sebastiana Tola, Ángel Gómez-Martin
Mycoplasma capricolum subsp. capricolum is one of the causative agents of contagious agalactia (CA). Nevertheless, there is still a lack of information about its antimicrobial susceptibility and genetic characteristics. Therefore, the aim of this work was to study the antimicrobial and genetic variability of different Mycoplasma capricolum subsp. capricolum field isolates. For this purpose, the growth inhibition effect of 18 antimicrobials and a multilocus sequence typing (MLST) scheme based on five housekeeping genes (fusA, glpQ, gyrB, lepA and rpoB) were performed on 32 selected field isolates from Italy and Spain...
2017: PloS One
https://www.readbyqxmd.com/read/28346537/deep-mutational-scanning-identifies-sites-in-influenza-nucleoprotein-that-affect-viral-inhibition-by-mxa
#7
Orr Ashenberg, Jai Padmakumar, Michael B Doud, Jesse D Bloom
The innate-immune restriction factor MxA inhibits influenza replication by targeting the viral nucleoprotein (NP). Human influenza virus is more resistant than avian influenza virus to inhibition by human MxA, and prior work has compared human and avian viral strains to identify amino-acid differences in NP that affect sensitivity to MxA. However, this strategy is limited to identifying sites in NP where mutations that affect MxA sensitivity have fixed during the small number of documented zoonotic transmissions of influenza to humans...
March 27, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28346510/study-on-the-biodegradation-of-crude-oil-by-free-and-immobilized-bacterial-consortium-in-marine-environment
#8
Qingguo Chen, Jingjing Li, Mei Liu, Huiling Sun, Mutai Bao
Five strains of bacteria, namely, Exiguobacterium sp. ASW-1, Pseudomonas aeruginosa strain ASW-2, Alcaligenes sp. ASW-3, Alcaligenes sp. ASS-1, and Bacillus sp. ASS-2, were isolated from the Zhejiang coast in China. The mixed flora of the five strains performed well with degrading 75.1% crude oil (1%, w/v) in 7 days. The calcium alginate-activated carbon embedding carrier was used to immobilize bacterial consortium. Immobilized cells performed better than free ones in variations of environmental factors containing incubated temperature, initial pH, salinity of the medium and crude oil concentration...
2017: PloS One
https://www.readbyqxmd.com/read/28346498/characteristics-of-seasonal-influenza-a-and-b-in-latin-america-influenza-surveillance-data-from-ten-countries
#9
Saverio Caini, Wladimir J Alonso, Angel Balmaseda, Alfredo Bruno, Patricia Bustos, Leticia Castillo, Celina de Lozano, Doménica de Mora, Rodrigo A Fasce, Walquiria Aparecida Ferreira de Almeida, Gabriela F Kusznierz, Jenny Lara, Maria Luisa Matute, Brechla Moreno, Claudio Maierovitch Pessanha Henriques, Juan Manuel Rudi, Clotilde El-Guerche Séblain, François Schellevis, John Paget
INTRODUCTION: The increased availability of influenza surveillance data in recent years justifies an actual and more complete overview of influenza epidemiology in Latin America. We compared the influenza surveillance systems and assessed the epidemiology of influenza A and B, including the spatio-temporal patterns of influenza epidemics, in ten countries and sub-national regions in Latin America. METHODS: We aggregated the data by year and country and characteristics of eighty-two years were analysed...
2017: PloS One
https://www.readbyqxmd.com/read/28346493/aberrant-neuronal-activity-induced-signaling-and-gene-expression-in-a-mouse-model-of-rasopathy
#10
Franziska Altmüller, Santosh Pothula, Anil Annamneedi, Saeideh Nakhei-Rad, Carolina Montenegro-Venegas, Eneko Pina-Fernández, Claudia Marini, Monica Santos, Denny Schanze, Dirk Montag, Mohammad R Ahmadian, Oliver Stork, Martin Zenker, Anna Fejtova
Noonan syndrome (NS) is characterized by reduced growth, craniofacial abnormalities, congenital heart defects, and variable cognitive deficits. NS belongs to the RASopathies, genetic conditions linked to mutations in components and regulators of the Ras signaling pathway. Approximately 50% of NS cases are caused by mutations in PTPN11. However, the molecular mechanisms underlying cognitive impairments in NS patients are still poorly understood. Here, we report the generation and characterization of a new conditional mouse strain that expresses the overactive Ptpn11D61Y allele only in the forebrain...
March 27, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28346470/relationship-of-microbial-communities-and-suppressiveness-of-trichoderma-fortified-composts-for-pepper-seedlings-infected-by-phytophthora-nicotianae
#11
Margarita Ros, Iulia Raut, Ana Belén Santisima-Trinidad, Jose Antonio Pascual
The understanding of the dynamic of soil-borne diseases is related to the microbial composition of the rhizosphere which is the key to progress in the field of biological control. Trichoderma spp. is commonly used as a biological control agent. The use of next generation sequencing approaches and quantitative PCR are two successful approaches to assess the effect of using compost as substrate fortified with two Trichoderma strains (Trichoderma harzianum or Trichoderma asperellum) on bacterial and fungal communities in pepper rhizosphere infected with Phytophthora nicotianae...
2017: PloS One
https://www.readbyqxmd.com/read/28346467/characterization-and-interstrain-transfer-of-prophage-pp3-of-pseudomonas-aeruginosa
#12
Gang Li, Shuguang Lu, Mengyu Shen, Shuai Le, Wei Shen, Yinling Tan, Jing Wang, Xia Zhao, Yan Zhao, Yali Gong, Yuhui Yang, Hongbin Zhu, Fuquan Hu, Ming Li
Prophages are major contributors to horizontal gene transfer and drive the evolution and diversification of bacteria. Here, we describe the characterization of a prophage element designated pp3 in the clinical Pseudomonas aeruginosa isolate PA1. pp3 spontaneously excises from the PA1 genome and circularizes at a very high frequency of 25%. pp3 is likely to be a defective prophage due to its inability to form plaques on P. aeruginosa indicator strains, and no phage particles could be detected in PA1 supernatants...
2017: PloS One
https://www.readbyqxmd.com/read/28346461/geometry-can-provide-long-range-mechanical-guidance-for-embryogenesis
#13
Mahamar Dicko, Pierre Saramito, Guy B Blanchard, Claire M Lye, Bénédicte Sanson, Jocelyn Étienne
Downstream of gene expression, effectors such as the actomyosin contractile machinery drive embryo morphogenesis. During Drosophila embryonic axis extension, actomyosin has a specific planar-polarised organisation, which is responsible for oriented cell intercalation. In addition to these cell rearrangements, cell shape changes also contribute to tissue deformation. While cell-autonomous dynamics are well described, understanding the tissue-scale behaviour challenges us to solve the corresponding mechanical problem at the scale of the whole embryo, since mechanical resistance of all neighbouring epithelia will feedback on individual cells...
March 27, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28346408/gut-microbial-metabolites-limit-the-frequency-of-autoimmune-t-cells-and-protect-against-type-1-diabetes
#14
Eliana Mariño, James L Richards, Keiran H McLeod, Dragana Stanley, Yu Anne Yap, Jacinta Knight, Craig McKenzie, Jan Kranich, Ana Carolina Oliveira, Fernando J Rossello, Balasubramanian Krishnamurthy, Christian M Nefzger, Laurence Macia, Alison Thorburn, Alan G Baxter, Grant Morahan, Lee H Wong, Jose M Polo, Robert J Moore, Trevor J Lockett, Julie M Clarke, David L Topping, Leonard C Harrison, Charles R Mackay
Gut dysbiosis might underlie the pathogenesis of type 1 diabetes. In mice of the non-obese diabetic (NOD) strain, we found that key features of disease correlated inversely with blood and fecal concentrations of the microbial metabolites acetate and butyrate. We therefore fed NOD mice specialized diets designed to release large amounts of acetate or butyrate after bacterial fermentation in the colon. Each diet provided a high degree of protection from diabetes, even when administered after breakdown of immunotolerance...
March 27, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28346399/endothelial-cell-specific-activation-of-transforming-growth-factor-%C3%AE-signaling-in-mice-induces-cutaneous-visceral-and-microvascular-fibrosis
#15
Peter J Wermuth, Kellan R Carney, Fabian A Mendoza, Sonsoles Piera-Velazquez, Sergio A Jimenez
In this study, we tested the hypothesis that constitutive endothelial cell-specific activation of TGF-β signaling induces tissue fibrosis and vasculopathy resembling the characteristic fibrotic and vascular alterations of systemic sclerosis. Transgenic mice with inducible expression of a constitutively active TGF-β receptor I specifically in endothelial cells were generated by intercrossing mice harboring a constitutively active TGF-β receptor I with a mouse strain containing the endothelial cell-specific Cdh5 gene promoter directing the tamoxifen-inducible expression of the Cre-ER(T2) cassette...
March 27, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28346365/an-amylase-like-protein-amyd-is-the-major-negative-regulator-for-%C3%AE-glucan-synthesis-in-aspergillus-nidulans-during-the-asexual-life-cycle
#16
Xiaoxiao He, Shengnan Li, Susan Kaminskyj
α-Glucan affects fungal cell-cell interactions and is important for the virulence of pathogenic fungi. Interfering with production of α-glucan could help to prevent fungal infection. In our previous study, we reported that an amylase-like protein, AmyD, could repress α-glucan accumulation in Aspergillus nidulans. However, the underlying molecular mechanism was not clear. Here, we examined the localization of AmyD and found it was a membrane-associated protein. We studied AmyD function in α-glucan degradation, as well as with other predicted amylase-like proteins and three annotated α-glucanases...
March 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346361/specificity-in-legume-rhizobia-symbioses
#17
REVIEW
Mitchell Andrews, Morag E Andrews
Most species in the Leguminosae (legume family) can fix atmospheric nitrogen (N₂) via symbiotic bacteria (rhizobia) in root nodules. Here, the literature on legume-rhizobia symbioses in field soils was reviewed and genotypically characterised rhizobia related to the taxonomy of the legumes from which they were isolated. The Leguminosae was divided into three sub-families, the Caesalpinioideae, Mimosoideae and Papilionoideae. Bradyrhizobium spp. were the exclusive rhizobial symbionts of species in the Caesalpinioideae, but data are limited...
March 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346358/genomic-evidence-for-bacterial-determinants-influencing-obesity-development
#18
Raphael D Isokpehi, Shaneka S Simmons, Matilda O Johnson, Marinelle Payton
Obesity is a major global public health problem requiring multifaceted interventional approaches including dietary interventions with probiotic bacteria. High-throughput genome sequencing of microbial communities in the mammalian gastrointestinal system continues to present diverse protein function information to understand the bacterial determinants that influence obesity development. The goal of the research reported in this article was to identify biological processes in probiotic bacteria that could influence the mechanisms for the extraction of energy from diet in the human gastrointestinal system...
March 26, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28346334/outdoor-cultivation-of-marine-diatoms-for-year-round-production-of-biofuels
#19
Mitsufumi Matsumoto, Daisuke Nojima, Tomomi Nonoyama, Kiichi Ikeda, Yoshiaki Maeda, Tomoko Yoshino, Tsuyoshi Tanaka
Biofuel production using microalgae is believed to have the advantage of continuous year-round production over crop plants, which have strong seasonality. However, actual year-round production of microalgal lipids using outdoor mass cultivation has rarely been demonstrated. In our previous study, it was demonstrated that the oleaginous diatom, Fistulifera solaris, was culturable in outdoor bioreactors from spring to autumn, whereas biomass and lipid production in winter failed because F. solaris did not grow below 15 °C...
March 25, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28346319/effect-of-combination-antiretroviral-therapy-on-hiv-1-specific-antibody-dependent-cellular-cytotoxicity-responses-in-subtype-b-and-subtype-c-infected-cohorts
#20
Vijaya Madhavi, Archana Kulkarni, Ashwini Shete, Wen Shi Lee, Milla R Mclean, Anne B Kristensen, Manisha Ghate, Bruce D Wines, P Mark Hogarth, Matthew S Parsons, Anthony Kelleher, David A Cooper, Janaki Amin, Sean Emery, Madhuri Thakar, Stephen J Kent
BACKGROUND: There is growing interest in immune therapies to clear the latent HIV-1 after combination antiretroviral therapy (cART). There is limited information on the effect of cART on antibody-dependent cellular cytotoxicity (ADCC) and no studies have directly compared ADCC in HIV-1 subtype B- and subtype C-infected subjects. The effect of improving immunocompetence on ADCC to influenza also remains unexplored. METHODS: The effect of cART on HIV-1- and influenza-specific ADCC was analyzed in two cohorts (39 subtype B- and 47 subtype C-infected subjects) before and after two years of cART...
March 23, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
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