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https://www.readbyqxmd.com/read/28340026/high-rate-of-subcutaneous-implantable-cardioverter-defibrillator-sensing-screening-failure-in-patients-with-brugada-syndrome-a-comparison-with-other-inherited-primary-arrhythmia-syndromes
#1
Giulio Conte, Mihoko Kawabata, Carlo de Asmundis, Erika Taravelli, Francesco Petracca, Diego Ruggiero, Maria Luce Caputo, François Regoli, Gian-Battista Chierchia, Alessandra Chiodini, Alessandro Del Bufalo, Tiziano Moccetti, Masahiko Goya, Kenzo Hirao, Alessandro Vicentini, Gaetano M De Ferrari, Pedro Brugada, Angelo Auricchio
Aims: Subcutaneous implantable cardioverter-defibrillator (S-ICD) can avoid important complications associated with transvenous leads in patients with inherited primary arrhythmia syndromes, who do not need pacing therapy. Few data are available on the percentage of patients with inherited arrhythmia syndromes eligible for S-ICD implantation. Aim of this study was to analyse the eligibility for S-ICD in a series of patients with Brugada syndrome (BrS), and to compare it with patients with other channelopathies...
March 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339981/transcriptome-analysis-of-comb-and-testis-from-rose-comb-silky-chicken-r1-r1-and-beijing-fatty-wild-type-chicken-r-r
#2
Y Wang, J Li, C Feng, Y Zhao, X Hu, N Li
Rose-comb was one of the chicken comb-variants first used by Bateson and Punnet in 1902 to demonstrate Mendelian inheritance in animals. Rose-comb is a monogenic trait that has been widely described in chickens. It is caused by a large structural rearrangement that leads to mis-expression of transcription factor MNR2 on chromosome 7. Rose-comb has pleiotropic effects in homozygous roosters, which is associated with poor sperm mobility. It was postulated that this is caused by the disruption of the CCDC108 gene located at the distal inversion breakpoint...
March 2, 2017: Poultry Science
https://www.readbyqxmd.com/read/28339911/a-null-variant-in-the-apolipoprotein-l3-gene-is-associated-with-non-diabetic-nephropathy
#3
Karl L Skorecki, Jessica H Lee, Carl D Langefeld, Saharon Rosset, Shay Tzur, Walter G Wasser, Revital Shemer, Gregory A Hawkins, Jasmin Divers, Rulan S Parekh, Man Li, Matthew G Sampson, Matthias Kretzler, Martin R Pollak, Shrijal Shah, Daniel Blackler, Brendan Nichols, Michael Wilmot, Seth L Alper, Barry I Freedman, David J Friedman
Background.: Inheritance of apolipoprotein L1 gene ( APOL1 ) renal-risk variants in a recessive pattern strongly associates with non-diabetic end-stage kidney disease (ESKD). Further evidence supports risk modifiers in APOL1 -associated nephropathy; some studies demonstrate that heterozygotes possess excess risk for ESKD or show earlier age at ESKD, relative to those with zero risk alleles. Nearby loci are also associated with ESKD in non-African Americans. Methods.: We assessed the role of the APOL3 null allele rs11089781 on risk of non-diabetic ESKD...
February 20, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339646/tgf-%C3%AE-receptor-inhibition-prevents-ventricular-fibrosis-in-a-mouse-model-of-progressive-cardiac-conduction-disease
#4
Mickael Derangeon, Jérôme Montnach, Cynthia Ore Cerpa, Benoit Jagu, Justine Patin, Gilles Toumaniantz, Aurore Girardeau, Christopher Lh Huang, William H Colledge, Andrew A Grace, Isabelle Baró, Flavien Charpentier
Loss-of-function mutations in SCN5A, the gene encoding Nav1.5 channel, have been associated with inherited progressive cardiac conduction disease (PCCD). We have proposed that Scn5a heterozygous knock-out (Scn5a+/-) mice, which are characterized by ventricular fibrotic remodeling with ageing, represent a model for PCCD. Our objectives were to identify the molecular pathway involved in fibrosis development and prevent its activation. Methods and results: Our study shows that myocardial interstitial fibrosis occurred in Scn5a+/- mice only after 45 weeks of age...
February 17, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28339476/transgenic-mice-overexpressing-desmocollin-2-dsc2-develop-cardiomyopathy-associated-with-myocardial-inflammation-and-fibrotic-remodeling
#5
Andreas Brodehl, Darrell D Belke, Lauren Garnett, Kristina Martens, Nelly Abdelfatah, Marcela Rodriguez, Catherine Diao, Yong-Xiang Chen, Paul M K Gordon, Anders Nygren, Brenda Gerull
BACKGROUND: Arrhythmogenic cardiomyopathy is an inherited heart muscle disorder leading to ventricular arrhythmias and heart failure, mainly as a result of mutations in cardiac desmosomal genes. Desmosomes are cell-cell junctions mediating adhesion of cardiomyocytes; however, the molecular and cellular mechanisms underlying the disease remain widely unknown. Desmocollin-2 is a desmosomal cadherin serving as an anchor molecule required to reconstitute homeostatic intercellular adhesion with desmoglein-2...
2017: PloS One
https://www.readbyqxmd.com/read/28338660/germline-and-somatic-genetics-of-osteosarcoma-connecting-aetiology-biology-and-therapy
#6
REVIEW
D Matthew Gianferante, Lisa Mirabello, Sharon A Savage
Clinical outcomes and treatment modalities for osteosarcoma, the most common primary cancer of bone, have changed very little over the past 30 years. The peak incidence of osteosarcoma occurs during the adolescent growth spurt, which suggests that bone growth and pubertal hormones are important in the aetiology of the disease. Tall stature, high birth weight and certain inherited cancer predisposition syndromes are well-described risk factors for osteosarcoma. Common genetic variants are also associated with osteosarcoma...
March 24, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28338638/the-value-of-coenzyme-q10-determination-in-mitochondrial-patients
#7
REVIEW
Delia Yubero, George Allen, Rafael Artuch, Raquel Montero
Coenzyme Q10 (CoQ) is a lipid that is ubiquitously synthesized in tissues and has a key role in mitochondrial oxidative phosphorylation. Its biochemical determination provides insight into the CoQ status of tissues and may detect CoQ deficiency that can result from either an inherited primary deficiency of CoQ metabolism or may be secondary to different genetic and environmental conditions. Rapid identification of CoQ deficiency can also allow potentially beneficial treatment to be initiated as early as possible...
March 24, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28338110/frequency-of-the-ugt1a1-28-polymorphism-in-a-romanian-cohort-of-gilbert-syndrome-individuals
#8
Viorica E Radoi, Radu I Ursu, Elena Poenaru, Cosmin Arsene, Camil L Bohiltea, Roxana Bohiltea
BACKGROUND AND AIMS: Gilbert syndrome (GS) is characterized by unconjugated hyperbilirubinemia without liver disease or overt hemolysis and it is found in 3-10% of the general population. Inherited hyperbilirubinaemia is attributable to a reduced UGT1A1 activity. The UGT1A1 promoter (TA) repeats variants are documented of being involved in abnormally elevated bilirubin levels. The aim of the present study is to analyze the impact of UGT1A1 promoter variants on bilirubin levels in Romanian patients clinically supected with GS...
March 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28338025/preventing-perioperative-bleeding-in-patients-with-inherited-bleeding-disorders
#9
Colin Watterson, Nicholas Beacher
Data sourcesCochrane Cystic Fibrosis and Genetic Disorders Group's Coagulopathies Trials Register, a regularly updated database informed by trials identified within electronic databases including MEDLINE. Further defined searches were undertaken in PubMed, Embase, The Cochrane Library, ClinicalTrials.gov and WHO International Clinical Trials Registry Platform. Additional hand searching of relevant journals and books of conference proceedings was undertaken.Study selectionRandomised and quasi-randomised controlled trials in people of all ages with haemophilia or VWD undergoing oral or dental procedures using antifibrinolytic agents (tranexamic acid (TXA) or epsilon aminocaproic acid (EACA)) to prevent perioperative bleeding compared to no intervention with or without placebo...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28337824/phenotype-genotype-correlations-of-pigo-deficiency-with-variable-phenotypes-from-infantile-lethality-to-mild-learning-difficulties
#10
Junpei Tanigawa, Haruka Mimatsu, Seiji Mizuno, Nobuhiko Okamoto, Daisuke Fukushi, Koji Tominaga, Hiroyuki Kidokoro, Yukako Muramatsu, Eriko Nishi, Shota Nakamura, Daisuke Motooka, Noriko Nomura, Kiyoshi Hayasaka, Tetsuya Niihori, Yoko Aoki, Shin Nabatame, Masahiro Hayakawa, Jun Natsume, Keiichi Ozono, Taroh Kinoshita, Nobuaki Wakamatsu, Yoshiko Murakami
Inherited GPI (glycosylphosphatidylinositol) deficiencies (IGDs), a recently defined group of diseases, show a broad spectrum of symptoms. Hyperphosphatasia mental retardation syndrome, also known as Mabry syndrome, is a type of IGDs. There are at least 26 genes involved in the biosynthesis and transport of GPI anchored proteins; however, IGDs constitute a rare group of diseases and correlations between the spectrum of symptoms and affected genes or the type of mutations have not been shown. Here we report four newly identified and five previously described Japanese families with PIGO (phosphatidylinositol glycan anchor biosynthesis class O) deficiency...
March 23, 2017: Human Mutation
https://www.readbyqxmd.com/read/28337184/the-maternally-inheritable-wolbachia-walbb-induces-refractoriness-to-plasmodium-berghei-in-anopheles-stephensi
#11
Deepak Joshi, Xiaoling Pan, Michael J McFadden, David Bevins, Xiao Liang, Peng Lu, Suzanne Thiem, Zhiyong Xi
The endosymbiont Wolbachia wAlbB induces refractoriness to Plasmodium falciparum in Anopheles stephensi, the primary mosquito vector of human malaria in the Middle East and South Asia. However, it remains unknown whether such refractoriness can be extended to other malaria species. In particular, it was reported that under very specific conditions, wAlbB can enhance Plasmodium infection in some hosts. Here, we measured the impact of wAlbB on the rodent malaria parasite Plasmodium berghei in A. stephensi by comparing the load of oocysts and sporozoites in midguts and salivary glands, respectively, between wAlbB-infected and -uninfected mosquitoes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28336914/inhibition-of-serum-and-glucocorticoid-regulated-kinase-1-as-novel-therapy-for-cardiac-arrhythmia-disorders
#12
Vassilios J Bezzerides, Aifeng Zhang, Ling Xiao, Bridget Simonson, Santosh A Khedkar, Shiro Baba, Filomena Ottaviano, Stacey Lynch, Katherine Hessler, Alan C Rigby, David Milan, Saumya Das, Anthony Rosenzweig
Alterations in sodium flux (INa) play an important role in the pathogenesis of cardiac arrhythmias and may also contribute to the development of cardiomyopathies. We have recently demonstrated a critical role for the regulation of the voltage-gated sodium channel NaV1.5 in the heart by the serum and glucocorticoid regulated kinase-1 (SGK1). Activation of SGK1 in the heart causes a marked increase in both the peak and late sodium currents leading to prolongation of the action potential duration and an increased propensity to arrhythmia...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336671/stem-cell-divisions-somatic-mutations-cancer-etiology-and-cancer-prevention
#13
Cristian Tomasetti, Lu Li, Bert Vogelstein
Cancers are caused by mutations that may be inherited, induced by environmental factors, or result from DNA replication errors (R). We studied the relationship between the number of normal stem cell divisions and the risk of 17 cancer types in 69 countries throughout the world. The data revealed a strong correlation (median = 0.80) between cancer incidence and normal stem cell divisions in all countries, regardless of their environment. The major role of R mutations in cancer etiology was supported by an independent approach, based solely on cancer genome sequencing and epidemiological data, which suggested that R mutations are responsible for two-thirds of the mutations in human cancers...
March 24, 2017: Science
https://www.readbyqxmd.com/read/28336548/nutrient-sensing-by-absorptive-and-secretory-progenies-of-small-intestinal-stem-cells
#14
Kunihiro Kishida, Sarah C Pearce, Shiyan Yu, Nan Gao, Ronaldo P Ferraris
Nutrient sensing triggers responses by the gut-brain axis modulating hormone release, feeding behavior and metabolism that become dysregulated in metabolic syndrome and some cancers. Except for absorptive enterocytes and secretory enteroendocrine cells, the ability of many intestinal cell types to sense nutrients is still unknown, hence we hypothesized that progenitor stem cells (ISC) possess nutrient sensing ability inherited by progenies during differentiation. We directed via modulators of Wnt and Notch signaling, differentiation of precursor mouse intestinal crypts into specialized organoids each containing ISC, enterocyte, goblet or Paneth cells at relative proportions much higher than in situ as determined by mRNA expression and immunocytochemistry of cell type biomarkers...
March 23, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28336253/mitochondrial-matters-mitochondrial-bottlenecks-self-assembling-structures-and-entrapment-in-the-female-germline
#15
Florence L Marlow
Mitochondrial replacement therapy, a procedure to generate embryos with the nuclear genome of a donor mother and the healthy mitochondria of a recipient egg, has recently emerged as a promising strategy to prevent transmission of devastating mitochondrial DNA diseases and infertility. The procedure may produce an embryo that is free of diseased mitochondria. A recent study addresses important fundamental questions about the mechanisms underlying maternal inheritance and translational questions regarding the transgenerational effectiveness of this promising therapeutic strategy...
March 15, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28335750/novel-compound-heterozygous-mutations-in-the-otof-gene-identified-by-whole-exome-sequencing-in-auditory-neuropathy-spectrum-disorder
#16
Fengzhu Tang, Dengke Ma, Yulan Wang, Yuecai Qiu, Fei Liu, Qingqing Wang, Qiutian Lu, Min Shi, Liang Xu, Min Liu, Jianping Liang
BACKGROUND: Many hearing-loss diseases are demonstrated to have Mendelian inheritance caused by mutations in single gene. However, many deaf individuals have diseases that remain genetically unexplained. Auditory neuropathy is a sensorineural deafness in which sounds are able to be transferred into the inner ear normally but the transmission of the signals from inner ear to auditory nerve and brain is injured, also known as auditory neuropathy spectrum disorder (ANSD). The pathogenic mutations of the genes responsible for the Chinese ANSD population remain poorly understood...
March 23, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28335728/allelic-incompatibility-can-explain-female-biased-sex-ratios-in-dioecious-plants
#17
Pascal Pucholt, Henrik R Hallingbäck, Sofia Berlin
BACKGROUND: Biased sex ratios are common among dioecious plant species despite the theoretical prediction of selective advantage of even sex ratios. Albeit the high prevalence of deviations from even sex ratios, the genetic causes to sex biases are rarely known outside of a few model species. Here we present a mechanism underlying the female biased sex ratio in the dioecious willow species Salix viminalis. RESULTS: We compared the segregation pattern of genome-wide single nucleotide polymorphism markers in two contrasting bi-parental pedigree populations, the S3 with even sex ratio and the S5 with a female biased sex ratio...
March 23, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28335037/lrsam1-mediated-ubiquitylation-is-disrupted-in-axonal-charcot-marie-tooth-disease-2p
#18
Johanna E Hakonen, Vincenzo Sorrentino, Rossella Avagliano Trezza, Marit B de Wissel, Marlene van den Berg, Boris Bleijlevens, Fred van Ruissen, Ben Distel, Frank Baas, Noam Zelcer, Marian A J Weterman
Charcot-Marie-Tooth (CMT) disease type 2 is a genetically heterogeneous group of inherited neuropathies characterized by motor and sensory deficits as a result of peripheral axonal degeneration. We recently reported a frameshift mutation in the RING domain of LRSAM1 (c.2121_2122dup, p.Leu708Argfs) that encodes an E3 ubiquitin ligase, as the cause of axonal type CMT (CMT2P). However, the frequency of LRSAM1 mutations in CMT2 and the functional basis for their association with disease remains unknown. In this study we evaluated LRSAM1 mutations in two large Dutch cohorts...
March 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28335032/allele-specific-ablation-rescues-electrophysiological-abnormalities-in-a-human-ips-cell-model-of-long-qt-syndrome-with-a-calm2-mutation
#19
Yuta Yamamoto, Takeru Makiyama, Takeshi Harita, Kenichi Sasaki, Yimin Wuriyanghai, Mamoru Hayano, Suguru Nishiuchi, Hirohiko Kohjitani, Sayako Hirose, Jiarong Chen, Fumika Yokoi, Taisuke Ishikawa, Seiko Ohno, Kazuhisa Chonabayashi, Hideki Motomura, Yoshinori Yoshida, Minoru Horie, Naomasa Makita, Takeshi Kimura
Background: Calmodulin is a ubiquitous Ca 2+ sensor molecule encoded by three distinct calmodulin genes, CALM1-3 . Recently, mutations in CALM1-3 have been reported to be associated with severe early-onset long-QT syndrome (LQTS). However, the underlying mechanism through which heterozygous calmodulin mutations lead to severe LQTS remains unknown, particularly in human cardiomyocytes. Objectives: We aimed to establish an LQTS disease model associated with a CALM2 mutation (LQT15) using human induced pluripotent stem cells (hiPSCs) and to assess mutant allele-specific ablation by genome editing for the treatment of LQT15...
March 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334996/amelogenesis-imperfecta-caused-by-n-terminal-enamelin-point-mutations-in-mice-and-men-is-driven-by-endoplasmic-reticulum-stress
#20
Steven J Brookes, Martin J Barron, Claire E L Smith, James A Poulter, Alan J Mighell, Chris F Inglehearn, Catriona J Brown, Helen Rodd, Jennifer Kirkham, Michael J Dixon
"Amelogenesis imperfecta" (AI) describes a group of inherited diseases of dental enamel that have major clinical impact. Here, we identify the aetiology driving AI in mice carrying a p.S55I mutation in enamelin; one of the most commonly mutated proteins underlying AI in humans. Our data indicate that the mutation inhibits the ameloblast secretory pathway leading to ER stress and an activated unfolded protein response (UPR). Initially, with the support of the UPR acting in pro-survival mode, Enamp.S55I heterozygous mice secreted structurally normal enamel...
March 11, 2017: Human Molecular Genetics
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