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Cross resistance

Chloe Y Y Cheung, Elaine Y L Hui, Chi-Ho Lee, Kelvin H M Kwok, Rita A Gangwani, Kenneth K W Li, Jeffrey C W Chan, Yu-Cho Woo, Wing-Sun Chow, Michele M A Yuen, Rachel L C Wong, Carol H Y Fong, Aimin Xu, David S H Wong, Pak-Chung Sham, Karen S L Lam
Purpose: Diabetic retinopathy (DR) is a common microvascular complication of type 2 diabetes (T2DM). Genome-wide association studies (GWAS) had identified novel DR-susceptibility genetic variants in various populations. We examined the associations of these DR-associated single nucleotide polymorphisms (SNPs) with severe DR in a Chinese T2DM cohort. Methods: Cross-sectional case-control studies on sight-threatening DR (STDR) and proliferative DR (PDR) were performed...
October 1, 2016: Investigative Ophthalmology & Visual Science
Te-Chih Wong, Hsiu-Yueh Su, Yu-Tong Chen, Pei-Yu Wu, Hsi-Hsien Chen, Tso-Hsiao Chen, Yung-Ho Hsu, Shwu-Huey Yang
Recent studies have indicated that the ratio of C-reactive protein to albumin (CRP-Alb ratio) is associated with clinical outcomes in patients with disease. We examined the predictive value of this ratio in patients undergoing hemodialysis (HD). In this cross-sectional study, 91 eligible adult HD patients were analyzed, and the correlation between the CRP-Alb ratio and skeletal muscle mass normalized for body weight (SMM/wt; estimated using a bioelectrical impedance analyzer) was investigated. The mean age of the study participants was 54...
2016: PloS One
Jean-Emmanuel Hugonnet, Dominique Mengin-Lecreulx, Alejandro Monton, Tanneke den Blaauwen, Etienne Carbonnelle, Carole Veckerlé, Yves Brun, Michael van Nieuwenhze, Christiane Bouchier, Kuyek Tu, Louis B Rice, Michel Arthur
The target of β-lactam antibiotics is the D,D-transpeptidase activity of penicillin-binding proteins (PBPs) for synthesis of 4→3 cross-links in the peptidoglycan of bacterial cell walls. Unusual 3→3 cross-links formed by L,D-transpeptidases were first detected in Escherichia coli more than four decades ago, however no phenotype has previously been associated with their synthesis. Here we show that production of the L,D-transpeptidase YcbB in combination with elevated synthesis of the (p)ppGpp alarmone by RelA lead to full bypass of the D,D-transpeptidase activity of PBPs and to broad-spectrum β-lactam resistance...
October 21, 2016: ELife
Karolina Bierowiec, Katarzyna Płoneczka-Janeczko, Krzysztof Rypuła
Staphylococcus aureus, especially methicillin-resistant S. aureus (MRSA), is a significant pathogen in both human medicine and veterinary medicine. The importance of pets as reservoirs of human infections is still poorly understood. This article provides detailed information of a cross-sectional study of a S. aureus colonization in clinically healthy indoor cats. The study systematically assessed a number of different anatomical locations for the S. aureus colonization and the influence of a range of potential risk factors on the value of the final S...
2016: BioMed Research International
So Young Ock, Kyoung Hwa Ha, Bu Kyung Kim, Hyeon Chang Kim, Jee-Seon Shim, Myung Ha Lee, Young Me Yoon, Dae Jung Kim
BACKGROUND: We evaluated the associations between 25-hydroxyvitamin D (25(OH)D) concentrations in serum and insulin resistance in the healthy Korean population. METHODS: We conducted this cross-sectional analysis in 1,807 healthy Korean people (628 men and 1,179 women) aged 30 to 64 years in the Cardiovascular and Metabolic Disease Etiologic Research Center study. All participants were assessed for 25(OH)D, fasting glucose, and insulin levels, and completed a health examination and lifestyle questionnaire according to standard procedures...
October 2016: Diabetes & Metabolism Journal
Richard M Schumacher, Jana L Arabas, Jerry L Mayhew, William F Brechue
The purpose of this study was to determine the effect of inter-investigator differences in anthropometric assessments on the prediction of one-repetition maximum (1RM) bench press in college football players. Division-II players (n = 34, age = 20.4 ± 1.2 y, 182.3 ± 6.6 cm, 99.1 ± 18.4 kg) were measured for selected anthropometric variables and 1RM bench press at the conclusion of a heavy resistance training program. Triceps, subscapular, and abdominal skinfolds were measured in triplicate by three investigators and used to estimate %fat...
2016: International Journal of Exercise Science
Szabolcs Makai, László Tamás, Angéla Juhász
Wheat has been cultivated for 10000 years and ever since the origin of hexaploid wheat it has been exempt from natural selection. Instead, it was under the constant selective pressure of human agriculture from harvest to sowing during every year, producing a vast array of varieties. Wheat has been adopted globally, accumulating variation for genes involved in yield traits, environmental adaptation and resistance. However, one small but important part of the wheat genome has hardly changed: the regulatory regions of both the x- and y-type high molecular weight glutenin subunit (HMW-GS) genes, which are alone responsible for approximately 12% of the grain protein content...
2016: Frontiers in Plant Science
Joshua A Beckman, Allison B Goldfine, Jane A Leopold, Mark A Creager
Oxidative stress is a key driver of vascular dysfunction in diabetes mellitus. Ebselen is a glutathione-peroxidase mimetic. A single-site, randomized, double-masked, placebo-controlled crossover trial in 26 subjects with either type 1 or type 2 diabetes to evaluate effects of high-dose ebselen (150 mg orally twice daily) administration on oxidative stress and endothelium-dependent vasodilation. Treatment periods were in random order of 4 weeks duration, with a 4 week washout between. Measures of oxidative stress included nitrotyrosine, plasma 8-isoprostanes, and the ratio of reduced-to-oxidized glutathione...
October 7, 2016: American Journal of Physiology. Heart and Circulatory Physiology
Nada H Aldahlawi, Sally Hayes, David P S O'Brart, Naomi D O'Brart, Keith M Meek
The aim of this study was to investigate corneal enzymatic resistance following epithelium off and on riboflavin/UVA cross-linking (CXL). One hundred and fourteen porcine eyes were divided into four non-irradiated control groups and seven CXL groups. The latter comprised; (i) epithelium-off, 0.1% iso-osmolar riboflavin, 9 mW UVA irradiation for 10 min, (ii) disrupted epithelium, 0.1% hypo-osmolar riboflavin, 9 mW UVA for 10 min, (iii) epithelium-on, 0.25% hypo-osmolar riboflavin with 0.01% benzylalkonium chloride (BACS), 9 mW UVA for 10 min, (iv) epithelium-on, 5 min iontophoresis at 0...
October 17, 2016: Experimental Eye Research
Benjamin Roche, Virginie Rougeron, Lluis Quintana-Murci, François Renaud, Jessica Lee Abbate, Franck Prugnolle
Malarial infections have long been recognized as a driver of human evolution, as demonstrated by the influence of Plasmodium falciparum on sickle-cell anemia persistence. Duffy-negativity is another blood disorder thought to have been selected because it confers nearly complete resistance against Plasmodium vivax infection. Recent evidence suggests that the benefits of being Duffy-negative cannot be expected to play a strong selective pressure on humans, whereas its costs cannot be considered as negligible...
October 17, 2016: Trends in Parasitology
Susan M Farabaugh, Bonita T Chan, Xiaojiang Cui, Robert K Dearth, Adrian V Lee
BACKGROUND: ErbB2 Receptor Tyrosine Kinase 2 (ErbB2, HER2/Neu) is amplified in breast cancer and associated with poor prognosis. Growing evidence suggests interplay between ErbB2 and insulin-like growth factor (IGF) signaling. For example, ErbB2 inhibitors can block IGF-induced signaling while, conversely, IGF1R inhibitors can inhibit ErbB2 action. ErbB receptors can bind and phosphorylate insulin receptor substrates (IRS) and this may be critical for ErbB-mediated anti-estrogen resistance in breast cancer...
October 21, 2016: Cell Communication and Signaling: CCS
Sebastien Breurec, Coralie Bouchiat, Jean-Marie Sire, Olivier Moquet, Raymond Bercion, Moussa Fafa Cisse, Philippe Glaser, Ousmane Ndiaye, Sidy Ka, Helene Salord, Abdoulaye Seck, Haby Signate Sy, Remy Michel, Benoit Garin
BACKGROUND: Neonatal infection constitutes one of Senegal's most important public health problems, with a mortality rate of 41 deaths per 1,000 live births. METHODS: Between January 2007 and March 2008, 242 neonates with suspected infection were recruited at three neonatal intensive care units in three major tertiary care centers in Dakar, the capital of Senegal. Neonatal infections were confirmed by positive bacterial blood or cerebrospinal fluid culture. The microbiological pattern of neonatal infections and the antibiotic susceptibility of the isolates were characterized...
October 20, 2016: BMC Infectious Diseases
Lucia Pavlikova, Mario Seres, Denisa Imrichova, Milan Hano, Andrej Rusnak, Martina Zamorova, Jaroslav Katrlik, Albert Breier, Zdena Sulova
In P-gp-positive cell variants obtained from L1210 cells either by selection with vincristine (L1210/R) or by transfection with the human gene encoding P-gp (L1210/T), we have previously described cross-resistance to tunicamycin (TNM), a protein N-glycosylation inhibitor. Here we studied whether this cross-resistance also underlies P-gp-positive variants of human acute myeloid leukemia cells (AML) derived from SKM-1 and MOLM-13 cells (SKM-1/VCR, SKM-1/LEN, MOLM-13/VCR) by selection with vincristine (VCR) and lenalidomide (LEN)...
October 2016: General Physiology and Biophysics
Oluwagbemiga Oluwole Ayoola, Peter Bulus, Olabisi Morebisi Loto, Bukunmi Michael Idowu
AIM: To determine the Doppler indices of the umbilical arteries in normal singleton pregnancy with a view to generating local reference ranges. METHODS: In this prospective, cross-sectional study, 400 pregnant women at 15-39 weeks' gestational age, with estimated fetal weight within the 10th and 90th percentile, no fetal malformation(s), and without any history of maternal medical disease, were recruited. Umbilical arteries were assessed on ultrasound, with the subjects in the supine position...
October 20, 2016: Journal of Obstetrics and Gynaecology Research
Carmine Carbone, Elena Di Gennaro, Geny Piro, Maria Rita Milone, Biagio Pucci, Michele Caraglia, Alfredo Budillon
Vorinostat demonstrated preclinical and clinical efficacy in human cancers and is the first histone deacetylase inhibitor (HDACi) approved for cancer treatment. Tissue transglutaminase (TG2) is a multifunctional enzyme that catalyzes a Ca(2+) dependent transamidating reaction resulting in covalent cross-links between proteins. TG2 acts also as G-protein in trans-membrane signaling and as a cell surface adhesion mediator. TG2 up-regulation has been demonstrated in several cancers and its expression levels correlate with resistance to chemotherapy and metastatic potential...
October 19, 2016: Amino Acids
Kyle T Aune, Joseph M Powers
BACKGROUND: Extreme conditioning programs (ECPs) are fitness training regimens relying on aerobic, plyometric, and resistance training exercises, often with high levels of intensity for a short duration of time. These programs have grown rapidly in popularity in recent years, but science describing the safety profile of these programs is lacking. HYPOTHESIS: The rate of injury in the extreme conditioning program is greater than the injury rate of weightlifting and the majority of injuries occur to the shoulder and back...
October 19, 2016: Sports Health
Masayuki Kyomoto, Toru Moro, Shihori Yamane, Yoshio Takatori, Sakae Tanaka, Kazuhiko Ishihara
The surface and substrate of a cross-linked polyethylene (CLPE) liner are designed to achieve resistance against oxidative degradation in the construction of hip joint replacements. In this study, we aimed to evaluate the oxidative degradation caused by lipid absorption of a highly hydrophilic nanometer-scaled thickness layer prepared by grafting a poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) layer and a high-dose gamma-ray irradiated CLPE with vitamin E blending (HD-CLPE[VE]). The HD-CLPE(VE) and PMPC-grafted HD-CLPE(VE) exhibited extremely high oxidation resistance regardless of lipid absorption, even though residual-free radical levels were detectable...
October 11, 2016: Biomaterials
Maria Helena Gusmao-Sena, Karine Curvello-Silva, Jairza Maria Barreto-Medeiros, Carla Hilário Da-Cunha-Daltro
INTRODUCTION: The main changes in the body composition refer to the increase of adipose tissue and/or the decrease of muscular mass, and these changes have effect in many clinical outcomes. Sarcopenic obesity (SO) consists of the presence of excessive adipose tissue and deficit of muscular mass simultaneously. People with SO may have synergistic effect due to obesity and sarcopenia, with increases cardiovascular risk more than obesity itself. OBJECTIVE: To describe the findings in the literature about the association between SO and risk factors and/or cardiometabolic disease (CMD) or cardiovascular disease (CVD)...
September 20, 2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
Daniel A De Luis, Rocío Aller, Olatz Izaola, David Primo, E Romero
INTRODUCTION: The aim of our study was to analyze the relationship of the rs9939609 FTO gene polymorphism with insulin resistance and serum adipokine levels. MATERIAL AND METHODS: A population of 610 patients with obesity was analyzed in a cross sectional design. Weight, blood pressure, basal glucose, c-reactive protein (CRP), insulin, insulin resistance (HOMA), lipid profile and adipocytokines (leptin, adiponectin, resistin, TNF alpha, and interleukin 6) levels were measured...
September 20, 2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
Pooja Gopal, Michelle Yee, Jickky Sarathy, Jian Liang Low, Jansy P Sarathy, Firat Kaya, Véronique Dartois, Martin Gengenbacher, Thomas Dick
Pyrazinamide (PZA) is a critical component of first- and second-line treatments of tuberculosis (TB), yet its mechanism of action largely remains an enigma. We carried out a genetic screen to isolate Mycobacterium bovis BCG mutants resistant to pyrazinoic acid (POA), the bioactive derivative of PZA, followed by whole genome sequencing of 26 POA resistant strains. Rather than finding mutations in the proposed candidate targets fatty acid synthase I and ribosomal protein S1, we found resistance conferring mutations in two pathways: missense mutations in aspartate decarboxylase panD, involved in the synthesis of the essential acyl carrier coenzyme A (CoA), and frameshift mutations in the vitro nonessential polyketide synthase genes mas and ppsA-E, involved in the synthesis of the virulence factor phthiocerol dimycocerosate (PDIM)...
September 9, 2016: ACS Infectious Diseases
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