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https://www.readbyqxmd.com/read/29341954/carbapenemase-production-of-clinical-isolates-acinetobacter-baumannii-and-pseudomonas-aeruginosa-from-a-bulgarian-university-hospital
#1
Atanaska P Petrova, Irina D Stanimirova, Ivan N Ivanov, Michael M Petrov, Tsonka M Miteva-Katrandzhieva, Vasil I Grivnev, Velichka S Kardjeva, Todor V Kantardzhiev, Mariana A Murdjeva
BACKGROUND: Production of Bla OXA-23, OXA-24, OXA-58 and hyperexpression of OXA-51 due to ISAba1 insertion sequence are the leading causes of carbapenem resistance in Acinetobacter baumannii. The loss of OprD transmembrane protein and the overexpression of some effl ux pumps are considered to be the main factors for carbapenem resistance in Pseudomonas aeruginosa whereas metallo-enzymes' production has a secondary role. AIM: Тo examine the carbapenem resistance due to carbapenemase production among clinically signifi cant Gram-negative non-fermenters from St George University hospital, Plovdiv: A...
December 20, 2017: Folia Medica
https://www.readbyqxmd.com/read/29341862/identification-of-three-genetic-variants-as-novel-susceptibility-loci-for-body-mass-index-in-a-japanese-population
#2
Yoshiki Yasukochi, Jun Sakuma, Ichiro Takeuchi, Kimihiko Kato, Mitsutoshi Oguri, Tetsuo Fujimaki, Hideki Horibe, Yoshiji Yamada
Recent genome-wide association studies have identified various obesity or metabolic syndrome (MetS) susceptibility loci. However, most studies were conducted in a cross-sectional manner. To address this gap, we performed a longitudinal exome-wide association study to identify susceptibility loci for obesity and MetS in a Japanese population. We traced clinical data of 6022 Japanese who had annual health check-ups for several years (mean follow-up period, 5 years), and genotyped ~244,000 genetic variants. The association of single nucleotide polymorphisms (SNPs) with body mass index (BMI) or the prevalence of obesity and MetS was examined using a generalized estimating equation model...
January 12, 2018: Physiological Genomics
https://www.readbyqxmd.com/read/29341130/mitochondrial-function-and-autophagy-integrating-proteotoxic-redox-and-metabolic-stress-in-parkinson-s-disease
#3
REVIEW
Jianhua Zhang, M Lillian Culp, Jason G Craver, Victor Darley-Usmar
Parkinson's disease (PD) is a movement disorder with widespread neurodegeneration in the brain. Significant oxidative, reductive, metabolic, and proteotoxic alterations have been observed in PD postmortem brains. The alterations of mitochondrial function resulting in decreased bioenergetic health is important and needs to be further examined to help develop biomarkers for PD severity and prognosis. It is now becoming clear that multiple hits on metabolic and signaling pathways are likely to exacerbate PD pathogenesis...
January 17, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29341116/rare-missense-mutations-in-recql-and-polg-associate-with-inherited-predisposition-to-breast-cancer
#4
Anna Tervasmäki, Tuomo Mantere, Jaana M Hartikainen, Saila Kauppila, Hang-Mao Lee, Susanna Koivuluoma, Mervi Grip, Peeter Karihtala, Arja Jukkola-Vuorinen, Arto Mannermaa, Robert Winqvist, Katri Pylkäs
Several known breast cancer susceptibility genes with moderate-to-high risk alleles encode proteins involved in DNA damage response (DDR). As these explain less than half of the hereditary breast cancer cases, additional predisposing alleles are likely to be discovered. Many of the previous studies utilizing massive parallel sequencing have focused on the protein-truncating variants, and the role of rare missense mutations has remained poorly addressed. In order to identify novel susceptibility factors, we have systematically analyzed the data from our parallel sequencing of 796 DDR genes in 189 Northern Finnish hereditary breast cancer patients for rare missense variants, predicted as deleterious...
January 17, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29340849/risk-factors-associated-with-feline-urolithiasis
#5
REVIEW
Veridiane da Rosa Gomes, Paula Costa Ariza, Naida Cristina Borges, Francisco Jorge Schulz, Maria Clorinda Soares Fioravanti
Urinary tract diseases are among the main reasons for consultation in veterinary clinics and hospitals. It affects animals of any age, breed and gender. Among the diseases that affect this system, urolithiasis is the second largest cause of clinical signs compatible with feline urinary tract disease. The term urolithiasis refers to the presence of uroliths in any region of the urinary tract, but it is more commonly seen in the bladder and urethra. Uroliths are classified based on the type of mineral present in their composition, therefore, quantitative and qualitative analyzes are important for a better therapeutic approach...
January 16, 2018: Veterinary Research Communications
https://www.readbyqxmd.com/read/29340614/association-of-polygenic-risk-score-with-cognitive-decline-and-motor-progression-in-parkinson-disease
#6
Kimberly C Paul, Jessica Schulz, Jeff M Bronstein, Christina M Lill, Beate R Ritz
Importance: Genetic factors have a well-known influence on Parkinson disease (PD) susceptibility. The largest genome-wide association study (GWAS) identified 26 independent single-nucleotide polymorphisms (SNPs) associated with PD risk. Among patients, the course and severity of symptom progression is variable, and little is known about the potential association of genetic factors with phenotypic variance. Objective: To assess whether GWAS-identified PD risk SNPs also have a cumulative association with the progression of cognitive and motor symptoms in patients with PD...
January 16, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/29340220/multilocus-analysis-of-genetic-susceptibility-to-myocardial-infarction-in-russians-replication-study
#7
N G Kukava, B V Titov, G J Osmak, N A Matveeva, O G Kulakova, A V Favorov, R M Shakhnovich, M Ya Ruda, O O Favorova
In search of genetic markers of myocardial infarction (MI) risk, which have prognostic significance for Russians, we performed a replication study of MI association with genetic variants of PCSK9 (rs562556), APOE (epsilon polymorphism, rs7412 and rs429358), LPL (rs320), MTHFR (rs1801133), eNOS (rs2070744), and the 9p21 region (rs1333049) in 405 patients with MI and 198 controls. Significant MI association was observed with variants of the lipid metabolism genes (PCSK9, APOE and LPL), and of eNOS. The SNPs in the MTHFR gene and the 9p21 region were not significantly associated with MI one by one but were included in several different MI-associated allelic combinations identified by multilocus analysis...
October 2017: Acta Naturae
https://www.readbyqxmd.com/read/29340030/increased-efficacy-of-metformin-corresponds-to-differential-metabolic-effects-in-the-ovarian-tumors-from-obese-versus-lean-mice
#8
Jianjun Han, Weiya Z Wysham, Yan Zhong, Hui Guo, Lu Zhang, Kim M Malloy, Hallum K Dickens, Gene Huh, Douglas Lee, Liza Makowski, Chunxiao Zhou, Victoria L Bae-Jump
Obesity is a significant risk factor for ovarian cancer (OC) and associated with worse outcomes for this disease. We assessed the anti-tumorigenic effects of metformin in human OC cell lines and a genetically engineered mouse model of high grade serous OC under obese and lean conditions. Metformin potently inhibited growth in a dose-dependent manner in all four human OC cell lines through AMPK/mTOR pathways. Treatment with metformin resulted in G1 arrest, induction of apoptosis, reduction of invasion and decreased hTERT expression...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339782/loss-of-disease-tolerance-during-citrobacter-rodentium-infection-is-associated-with-impaired-epithelial-differentiation-and-hyperactivation-of-t-cell-responses
#9
Eugene Kang, Guangyan Zhou, Mitra Yousefi, Romain Cayrol, Jianguo Xia, Samantha Gruenheid
Citrobacter rodentium is an intestinal mouse pathogen widely used as a model to study the mucosal response to infection. Inbred mouse strains suffer one of two fates following infection: self-limiting colitis or fatal diarrheal disease. We previously reported that Rspo2 is a major genetic determinant of the outcome of C. rodentium infection; Rspo2 induction during infection of susceptible mice leads to loss of intestinal function and mortality. Rspo2 induction does not impact bacterial colonization, but rather, impedes the ability of the host to tolerate C...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339516/human-airway-branch-variation-and-chronic-obstructive-pulmonary-disease
#10
Benjamin M Smith, Hussein Traboulsi, John H M Austin, Ani Manichaikul, Eric A Hoffman, Eugene R Bleecker, Wellington V Cardoso, Christopher Cooper, David J Couper, Stephen M Dashnaw, Jia Guo, MeiLan K Han, Nadia N Hansel, Emlyn W Hughes, David R Jacobs, Richard E Kanner, Joel D Kaufman, Eric Kleerup, Ching-Long Lin, Kiang Liu, Christian M Lo Cascio, Fernando J Martinez, Jennifer N Nguyen, Martin R Prince, Stephen Rennard, Stephen S Rich, Leora Simon, Yanping Sun, Karol E Watson, Prescott G Woodruff, Carolyn J Baglole, R Graham Barr
Susceptibility to chronic obstructive pulmonary disease (COPD) beyond cigarette smoking is incompletely understood, although several genetic variants associated with COPD are known to regulate airway branch development. We demonstrate that in vivo central airway branch variants are present in 26.5% of the general population, are unchanged over 10 y, and exhibit strong familial aggregation. The most common airway branch variant is associated with COPD in two cohorts (n = 5,054), with greater central airway bifurcation density, and with emphysema throughout the lung...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29339380/negative-regulation-of-the-keap1-nrf2-pathway-by-a-p62-sqstm1-splicing-variant
#11
Shun Kageyama, Tetsuya Saito, Miki Obata, Ryo-Hei Koide, Yoshinobu Ichimura, Masaaki Komatsu
A key anti-oxidant pathway, the Keap1-Nrf2 system, is regulated by p62/Sqstm1 via multiple mechanisms, including gene expression, post-translational modifications such as ubiquitination and phosphorylation, and autophagic degradation of p62/Sqstm1 and Keap1. Herein, we demonstrate a novel mode of regulation of the Keap1-Nrf2 system, mediated by a splicing variant of p62/Sqstm1 pre-mRNA. Ensembl database search and subsequent biochemical analyses in mice revealed the presence of an mRNA that encodes p62/Sqstm1 protein lacking the Keap1-interacting region (KIR), which is essential for the interaction with Keap1...
January 16, 2018: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/29339359/genetic-variants-in-immune-related-pathways-and-breast-cancer-risk-in-african-american-women-in-the-amber-consortium
#12
Chi-Chen Hong, Lara E Sucheston-Campbell, Song Liu, Qiang Hu, Song Yao, Kathryn L Lunetta, Stephen A Haddad, Edward A Ruiz-Narváez, Jeannette T Bensen, Ting-Yuan David Cheng, Elisa V Bandera, Lynn A Rosenberg, Christopher A Haiman, Kelvin P Lee, Sharon S Evans, Scott I Abrams, Elizabeth A Repasky, Andrew F Olshan, Julie R Palmer, Christine B Ambrosone
BACKGROUND: Constitutional immunity shaped by exposure to endemic infectious diseases and parasitic worms in Sub-Saharan Africa may play a role in the etiology of breast cancer among African American (AA) women. METHODS: A total of 13,235 gene variants in 433 genes across 45 immune pathways were analyzed in the AMBER consortium among 3,663 breast cancer cases and 4,687 controls. Gene-based pathway analyses were conducted using the adaptive rank truncated product statistic for overall breast cancer risk, and risk by estrogen receptor (ER) status...
January 16, 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29339145/ocular-delivery-of-proteins-and-peptides-challenges-and-novel-formulation-approaches
#13
Abhirup Mandal, Dhananjay Pal, Vibhuti Agrahari, Hoang My Trinh, Mary Joseph, Ashim K Mitra
The impact of proteins and peptides on the treatment of various conditions including ocular diseases over the past few decades has been advanced by substantial breakthroughs in structural biochemistry, genetic engineering, formulation and delivery approaches. Formulation and delivery of proteins and peptides, such as monoclonal antibodies, aptamers, recombinant proteins and peptides to ocular tissues poses significant challenges owing to their large size, poor permeation and susceptibility to degradation. A wide range of advanced drug delivery systems including polymeric controlled release systems, cell-based delivery and nanowafers are being exploited to overcome the challenges of frequent administration to ocular tissues...
January 12, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29338921/faster-progression-from-mci-to-probable-ad-for-carriers-of-a-single-nucleotide-polymorphism-associated-with-type-2-diabetes
#14
Hugo Girard, Olivier Potvin, Scott Nugent, Caroline Dallaire-Théroux, Stephen Cunnane, Simon Duchesne
Sporadic Alzheimer's disease (AD), as opposed to its autosomal dominant form, is likely caused by a complex interaction of genetic, environmental, and health lifestyle factors. Twin studies indicate that sporadic AD heritability could be between 58% and 79%, around half of which is explained by the ε4 allele of the apolipoprotein E (APOE4). We hypothesized that genes associated with known risk factors for AD, namely hypertension, hypercholesterolemia, obesity, diabetes, and cardiovascular disease, would contribute significantly to the remaining heritability...
December 7, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29337135/defining-bedaquiline-susceptibility-resistance-cross-resistance-and-associated-genetic-determinants-a-retrospective-cohort-study
#15
Nazir A Ismail, Shaheed V Omar, Lavania Joseph, Netricia Govender, Linsay Blows, Farzana Ismail, Hendrik Koornhof, Andries W Dreyer, Koné Kaniga, Norbert Ndjeka
BACKGROUND: Bedaquiline (BDQ) is a novel agent approved for use in combination treatment of multi-drug resistant tuberculosis (MDR-TB). We sought to determine BDQ epidemiological cut-off values (ECVs), define and assess interpretive criteria against putative resistance associated variants (RAVs), microbiological outcomes and cross resistance with clofazimine (CFZ). METHODS: A retrospective cohort study was conducted. Minimal inhibitory concentrations (MIC) to BDQ were determined using 7H9 broth microdilution (BMD) and MGIT960...
January 9, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29337073/neofunctionalization-of-duplicated-p450-genes-drives-the-evolution-of-insecticide-resistance-in-the-brown-planthopper
#16
Christoph T Zimmer, William T Garrood, Kumar Saurabh Singh, Emma Randall, Bettina Lueke, Oliver Gutbrod, Svend Matthiesen, Maxie Kohler, Ralf Nauen, T G Emyr Davies, Chris Bass
Gene duplication is a major source of genetic variation that has been shown to underpin the evolution of a wide range of adaptive traits [1, 2]. For example, duplication or amplification of genes encoding detoxification enzymes has been shown to play an important role in the evolution of insecticide resistance [3-5]. In this context, gene duplication performs an adaptive function as a result of its effects on gene dosage and not as a source of functional novelty [3, 6-8]. Here, we show that duplication and neofunctionalization of a cytochrome P450, CYP6ER1, led to the evolution of insecticide resistance in the brown planthopper...
January 4, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29337038/back-to-the-future-epigenetic-clock-plasticity-towards-healthy-aging
#17
REVIEW
Ken Declerck, Wim Vanden Berghe
Aging is the most important risk factor for major human lifestyle diseases, including cancer, neurological and cardiometabolic disorders. Due to the complex interplay between genetics, lifestyle and environmental factors, some individuals seem to age faster than others, whereas centenarians seem to have a slower aging process. Therefore, a biochemical biomarker reflecting the relative biological age would be helpful to predict an individual's health status and aging disease risk. Although it is already known for years that cumulative epigenetic changes occur upon aging, DNA methylation patterns were only recently used to construct an epigenetic clock predictor for biological age, which is a measure of how well your body functions compared to your chronological age...
January 11, 2018: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/29337003/mouse-lung-fibroblasts-are-highly-susceptible-to-necroptosis-in-a-reactive-oxygen-species-dependent-manner
#18
Muadh Hussain, Vanessa Zimmermann, Sjoerd J L van Wijk, Simone Fulda
Mouse embryonic fibroblasts (MEFs) have extensively been used to study necroptosis, a recently identified form of programmed cell death. However, very little is yet known about the role of necroptosis and its regulation by reactive oxygen species (ROS) in cell types naturally exposed to high oxygen levels such as mouse lung fibroblasts (MLFs). Here, we discover that MLFs are highly susceptible to undergo necroptosis in a ROS-dependent manner upon exposure to a prototypic death receptor-mediated necroptotic stimulus, i...
January 11, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29336249/mutations-of-nuclear-and-mitochondrial-genomes-as-potential-targets-for-the-treatment-of-metabolic-syndrome
#19
Elena V Galitsyn, Andrey V Zhelankin, Igor A Sobenin, Alexander N Orekhov
In addition to external factors, such as exercise, food and the environment, genetic predisposition makes great contribution to the development of metabolic disorders and cardiovascular disease. This review is aimed to examine the genetic basis of complex metabolic disorders conventionally described as "metabolic syndrome" (MetS), with the special focus on currently known mutations in the nuclear and mitochondrial genomes, which are associated both with the individual components of MetS and combinations thereof, and also on the studies of the relationship of MetS phenotype as a binary trait...
January 15, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29335448/regional-evaluation-of-childhood-acute-lymphoblastic-leukemia-genetic-susceptibility-loci-among-japanese
#20
Kevin Y Urayama, Masatoshi Takagi, Takahisa Kawaguchi, Keitaro Matsuo, Yoichi Tanaka, Yoko Ayukawa, Yuki Arakawa, Daisuke Hasegawa, Yuki Yuza, Takashi Kaneko, Yasushi Noguchi, Yuichi Taneyama, Setsuo Ota, Takeshi Inukai, Masakatsu Yanagimachi, Dai Keino, Kazutoshi Koike, Daisuke Toyama, Yozo Nakazawa, Hidemitsu Kurosawa, Kozue Nakamura, Koichi Moriwaki, Hiroaki Goto, Yujin Sekinaka, Daisuke Morita, Motohiro Kato, Junko Takita, Toshihiro Tanaka, Johji Inazawa, Katsuyoshi Koh, Yasushi Ishida, Akira Ohara, Shuki Mizutani, Fumihiko Matsuda, Atsushi Manabe
Genome-wide association studies (GWAS) performed mostly in populations of European and Hispanic ancestry have confirmed an inherited genetic basis for childhood acute lymphoblastic leukemia (ALL), but these associations are less clear in other races/ethnicities. DNA samples from ALL patients (aged 0-19 years) previously enrolled onto a Tokyo Children's Cancer Study Group trial were collected during 2013-2015, and underwent single nucleotide polymorphism (SNP) microarray genotyping resulting in 527 B-cell ALL for analysis...
January 15, 2018: Scientific Reports
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