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GIT protein

Mary Ann De Groote, Michael Higgins, Thomas Hraha, Kirsten Wall, Michael L Wilson, David G Sterling, Nebojsa Janjic, Randall Reves, Urs A Ochsner, Robert Belknap
The tests for diagnosing latent tuberculosis infection (LTBI) are limited by poor predictive value for identifying people at highest risk for progression to active TB, and have varying sensitivity and specificity in different populations. The identification of a more robust signature for LTBI is important for TB prevention and elimination. A pilot study was conducted with samples from immigrants to the U.S. that were screened for LTBI by the three commercially approved tests: Tuberculin Skin Test (TST), QuantiFERON-TB Gold In-Tube (QFT-GIT), and T-SPOT...
November 16, 2016: Journal of Clinical Microbiology
Vassilis Bourganis, Theodora Karamanidou, Olga Kammona, Costas Kiparissides
The oral administration of protein therapeutics is hindered by the multitude of barriers confronted by these molecules along the gastrointestinal tract (i.e., acidic environment, proteolytic degradation, mucosal barrier, etc.). Their unique properties (e.g., high molecular weight, hydrophilicity, charge, etc.) and labile structure are mainly responsible for their instability in the harsh conditions along the gastrointestinal tract (GIT) and dictate the employment of alternative routes for their administration (e...
November 12, 2016: European Journal of Pharmaceutics and Biopharmaceutics
Xiao-Ying Yan, Shao-Wu Zhang
During the development process of new drugs, identification of the drug-target interactions wins primary concerns. However, the chemical or biological experiments bear the limitation in coverage as well as the huge cost of both time and money. Based on drug similarity and target similarity, chemogenomic methods can be able to predict potential drug-target interactions (DTIs) on a large scale and have no luxurious need about target structures or ligand entries. Nevertheless, existing methods of drug chemical structure-based similarity and target sequence-based similarity may not reflect the cases that the drugs having variant structures interact with common targets and the targets having dissimilar sequences interact with same drugs...
November 7, 2016: Current Protein & Peptide Science
Alban Bujard, Charlotte Petit, Pierre-Alain Carrupt, Serge Rudaz, Julie Schappler
The parallel artificial membrane permeability assay (PAMPA) is a high-throughput screening (HTS) technique developed to predict passive permeability through numerous different biological membranes, such as the gastrointestinal tract (GIT), the blood brain barrier (BBB), and the dermal layer. PAMPA is based on an artificial membrane, such as hexadecane (HDM), which separates two compartments (i.e., a donor and an acceptor compartment). In the present study, an HDM-PAMPA method was developed with human serum albumin (HSA) under iso-pH and gradient-pH conditions to predict the percentage of binding, dissociation/association constants (Kd and Ka, respectively) and dissociation/association kinetic rates (koff and kon, respectively) between a given drug and HSA...
November 3, 2016: European Journal of Pharmaceutical Sciences
Bruno Tilocca, Maren Witzig, Markus Rodehutscord, Jana Seifert
The chicken gastrointestinal tract (GIT) harbours a complex microbial community, involved in several physiological processes such as host immunomodulation and feed digestion. For the first time, the present study analysed dietary effects on the protein inventory of the microbiome in crop and ceca of broilers. We performed quantitative label-free metaproteomics by using 1-D-gel electrophoresis coupled with LC-MS/MS to identify the structural and functional changes triggered by diets supplied with varying amount of mineral phosphorous (P) and microbial phytase (MP)...
2016: PloS One
Valerio Rossini, Katarina Radulovic, Christian U Riedel, Jan Hendrik Niess
Inflammatory bowel disease (IBD) is a chronic inflammation which affects the gastrointestinal tract (GIT). One of the best ways to study the immunological mechanisms involved during the disease is the T cell transfer model of colitis. In this model, immunodeficient mice (RAG(-/-) recipients) are reconstituted with naive CD4(+) T cells from healthy wild type hosts. This model allows examination of the earliest immunological events leading to disease and chronic inflammation, when the gut inflammation perpetuates but does not depend on a defined antigen...
2016: Journal of Visualized Experiments: JoVE
Giuseppina Mandalari, Maria Vardakou, Richard Faulks, Carlo Bisignano, Maria Martorana, Antonella Smeriglio, Domenico Trombetta
The goal of the present study was to quantify the rate and extent of polyphenols released in the gastrointestinal tract (GIT) from natural (NS) and blanched (BS) almond skins. A dynamic gastric model of digestion which provides a realistic simulation of the human stomach was used. In order to establish the effect of a food matrix on polyphenols bioaccessibility, NS and BS were either digested in water (WT) or incorporated into home-made biscuits (HB), crisp-bread (CB) and full-fat milk (FM). Phenolic acids were the most bioaccessible class (68...
2016: Nutrients
Bhagwat Prasad, Katherine Johnson, Sarah Billington, Caroline A Lee, Git W Chung, Colin D A Brown, Edward Kelly, Jonathan Himmelfarb, Jashvant D Unadkat
Protein expression of renal uptake (OAT1, OAT2, OAT3, OAT4, OCT2, OCTN1, OCTN2 and SGLT2) and efflux (P-gp, BCRP, MRP2, MRP4, MATE1 and MATE2-K) transporters was quantified by LC-MS/MS targeted proteomics using the surrogate peptide approach. Total membrane was isolated from the cortex of human kidneys (n=41). The isolated membranes were digested by trypsin and the digest was subjected to LC-MS/MS analysis. The mean±SD expression of surrogate peptides of OAT1, OAT2, OAT3, OAT4, OCT2, OCTN1, OCTN2, P-gp, MRP2, MRP4, MATE1 and SGLT2 was: 5...
September 12, 2016: Drug Metabolism and Disposition: the Biological Fate of Chemicals
Yin-Hing Ma, Golam S Islam, Ying Wu, Parviz M Sabour, James R Chambers, Qi Wang, Shirley X Y Wu, Mansel W Griffiths
Encapsulation of bacteriophages ("phage") protects phage against environmental deactivation and provides a product that is easy to handle for storage and application with animal feed as an antibiotic alternative. The objective of this study was to evaluate an orally administered, encapsulated phage for efficient phage release in the gastrointestinal tract (GIT) of young chicks receiving feed. An optimized formulation that consisted of 0.8% low molecular weight (MW) alginate, 2% ultra-low molecular weight alginate and 3% whey protein completely released the encapsulated phage within 60 min under simulated intestinal conditions...
September 1, 2016: Poultry Science
Fei Jiang, Jinyan He, Nalu Navarro-Alvarez, Jian Xu, Xia Li, Peng Li, Wenxue Wu
Chronic non-progressive pneumonia, a disease that has become a worldwide epidemic has caused considerable loss to sheep industry. Mycoplasma ovipneumoniae (M. ovipneumoniae) is the causative agent of interstitial pneumonia in sheep, goat and bighorn. We here have identified by immunogold and immunoblotting that elongation factor Tu (EF-Tu) and heat shock protein 70 (HSP 70) are membrane-associated proteins on M. ovipneumonaiea. We have evaluated the humoral and cellular immune responses in vivo by immunizing BALB/c mice with both purified recombinant proteins rEF-Tu and rHSP70...
2016: PloS One
Daniel J Gittings, Paul M Courtney, Blair S Ashley, Patrick J Hesketh, Derek J Donegan, Neil P Sheth
BACKGROUND: Criteria for diagnosis of infected internal fixation implants at the time of conversion to total hip arthroplasty (THA) are not clear. The purpose of this study is to identify risk factors for infection in patients undergoing conversion to THA. METHODS: We retrospectively reviewed patients at a single institution who underwent conversion to THA from 2009 to 2014. Patients were diagnosed with infection preoperatively using Musculoskeletal Infection Society criteria or postoperatively if they were found to have positive cultures intraoperatively at the time of conversion surgery...
July 6, 2016: Journal of Arthroplasty
Jalil Mahmwd Abdulla, Stephen Paul Rose, Alexander Mackay Mackenzie, Sonya Georgieva Ivanova, Genoveva Petrova Staykova, Vasil Radoslavov Pirgozliev
An experiment examined the effects of two field bean cultivar samples with different tannin contents, the effect of heat treatment (micronising) and the effect of dietary supplementation of a proprietary enzyme preparation containing tannase, pectinase, and xylanase activities on metabolisable energy (ME), total tract dry matter digestibility (DMD) and ether extract digestibility (EED), nitrogen retention (NR), tannin degradability, gastrointestinal tract (GIT) development, and endogenous mucin losses excretion in broiler chickens...
October 2016: Archives of Animal Nutrition
Jacob Shujui Hsu, Johnny S H Kwan, Zhicheng Pan, Maria-Mercè Garcia-Barcelo, Pak Chung Sham, Miaoxin Li
MOTIVATION: Exome sequencing studies have facilitated the detection of causal genetic variants in yet-unsolved Mendelian diseases. However, the identification of disease causal genes among a list of candidates in an exome sequencing study is still not fully settled, and it is often difficult to prioritize candidate genes for follow-up studies. The inheritance mode provides crucial information for understanding Mendelian diseases, but none of the existing gene prioritization tools fully utilize this information...
June 26, 2016: Bioinformatics
Stefanie Klinger, Bernd Schröder, Anja Gemmer, Julia Reimers, Gerhard Breves, Jens Herrmann, Mirja R Wilkens
During lactation, mineral and nutrient requirements increase dramatically, particularly those for Ca and glucose. In contrast to monogastric species, in ruminants, it is rather unclear to which extend this physiological change due to increased demand for milk production is accompanied by functional adaptations of the gastrointestinal tract (GIT). Therefore, we investigated potential modulations of Ca and glucose transport mechanisms in the GIT of lactating and dried-off sheep. Ussing-chamber technique was applied to determine the ruminal and jejunal Ca flux rates...
June 2016: Physiological Reports
Hao Sun, Xueqin Ni, Xu Song, Bin Wen, Yi Zhou, Fuqin Zou, Mingyue Yang, Zhirong Peng, Hui Zhu, Yan Zeng, Hesong Wang, Xiangchao Fu, Yunduo Shi, Zhongqiong Yin, Kangcheng Pan, Bo Jing, Dong Zeng, Ping Wang
Yupingfeng (YPF) is a kind of Astragali radix-based ancient Chinese herbal supplemented with Atractylodis Macrocephalae Rhizoma and Radix Saposhnikoviae. Increasing evidence has proven the beneficial immunomodulating activity of YPF. However, the action mechanism(s) of it is not known. Here, we explored the immunomodulatory activity of unfermented Yupingfeng polysaccharides (UYP) and fermented Yupingfeng polysaccharides (FYP) obtained using Rhizopus oligosporus SH in weaning Rex rabbits. The results showed that both UYP and FYP exhibited notable growth-promoting and immune-enhancing activities, improvement of the intestinal flora homeostasis, and maintenance of intestinal barrier integrity and functionality...
September 2016: Applied Microbiology and Biotechnology
Wu Zhou, Xiaobo Li, Richard T Premont
The GIT proteins, GIT1 and GIT2, are GTPase-activating proteins (inactivators) for the ADP-ribosylation factor (Arf) small GTP-binding proteins, and function to limit the activity of Arf proteins. The PIX proteins, α-PIX and β-PIX (also known as ARHGEF6 and ARHGEF7, respectively), are guanine nucleotide exchange factors (activators) for the Rho family small GTP-binding protein family members Rac1 and Cdc42. Through their multi-domain structures, GIT and PIX proteins can also function as signaling scaffolds by binding to numerous protein partners...
May 15, 2016: Journal of Cell Science
Caroline Thum, Warren C McNabb, Wayne Young, Adrian L Cookson, Nicole C Roy
SCOPE: The composition of the gastrointestinal (GIT) microbiota, particularly in early life, influences the development of metabolic diseases later in life. The maternal microbiota is the main source of bacteria colonising the infant GIT and can be modified by dietary prebiotics. Our objective was to determine the effects of prenatal consumption of prebiotic caprine milk oligosaccharides (CMO) on the large intestine of female mice, milk composition, and offspring's development. METHODS AND RESULTS: C57BL/6 mice were fed either a control diet, CMO diet, or galacto-oligosaccharide diet from mating to weaning...
September 2016: Molecular Nutrition & Food Research
Ruidong Xiang, Victor Hutton Oddy, Alan L Archibald, Phillip E Vercoe, Brian P Dalrymple
Background. Ruminants are successful herbivorous mammals, in part due to their specialized forestomachs, the rumen complex, which facilitates the conversion of feed to soluble nutrients by micro-organisms. Is the rumen complex a modified stomach expressing new epithelial (cornification) and metabolic programs, or a specialised stratified epithelium that has acquired new metabolic activities, potentially similar to those of the colon? How has the presence of the rumen affected other sections of the gastrointestinal tract (GIT) of ruminants compared to non-ruminants? Methods...
2016: PeerJ
Emer D Kelly, Francesca Bottacini, John O'Callaghan, Mary O'Connell Motherway, Kerry Joan O'Connell, Catherine Stanton, Douwe van Sinderen
Bifidobacterium breve is a noted inhabitant and one of the first colonizers of the human gastro intestinal tract (GIT). The ability of this bacterium to persist in the GIT is reflected by the abundance of carbohydrate-active enzymes that are encoded by its genome. One such family of enzymes is represented by the α-glucosidases, of which three, Agl1, Agl2 and MelD, have previously been identified and characterized in the prototype B. breve strain UCC2003. In this report, we describe an additional B. breve UCC2003-encoded α-glucosidase, along with a B...
May 2, 2016: International Journal of Food Microbiology
Renata F Boente, Heidi Pauer, Deborah N S Silva, Joaquim Santos Filho, Vanessa Sandim, Luis Caetano M Antunes, Rosana Barreto Rocha Ferreira, Russolina B Zingali, Regina M C P Domingues, Leandro A Lobo
Bacteroides fragilis is the most commonly isolated anaerobic bacteria from infectious processes. Several virulence traits contribute to the pathogenic nature of this bacterium, including the ability to tolerate the high concentrations of bile found in the gastrointestinal tract (GIT). The activity of bile salts is similar to detergents and may lead to membrane permeabilization and cell death. Modulation of outer membrane proteins (OMPs) is considered a crucial event to bile salts resistance. The primary objective of the current work was to identify B...
June 2016: Anaerobe
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