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Atrial Fibrillation Genes

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https://www.readbyqxmd.com/read/29129807/the-long-noncoding-rna-expression-profiles-of-paroxysmal-atrial-fibrillation-identified-by-microarray-analysis
#1
Ying Su, Long Li, Sheng Zhao, Yunan Yue, Shuixiang Yang
BACKGROUND: Long noncoding RNAs (lncRNAs) represent a novel class of noncoding RNAs that are involved in a variety of biological processes and human diseases. Recent evidence suggested that lncRNAs were associated with cardiac disorders. However, the roles of lncRNAs in paroxysmal atrial fibrillation (PAF) remain elusive. The purpose of the present study was to identify differentially expressed lncRNAs in PAF and predict their potential functions. METHODS: Between May 2014 and December 2015, a total of 67 patients, including 34 patients with PAF and 33 patients without PAF were recruited in this study...
November 9, 2017: Gene
https://www.readbyqxmd.com/read/29126922/the-unrecognized-role-of-tumor-suppressor-genes-in-atrial-fibrillation
#2
REVIEW
Liang Mao, Wenjun Huang, Ping Zou, Xitong Dang, Xiaorong Zeng
Epidemiogical evidence has shown that the incidence of atrial fibrillation in tumor patients is higher than non-tumor patients and general population. The potential risk factors predisposing tumor patients to atrial fibrillation include advanced age, comorbidities, direct anatomic local occupying effect of tumors in the heart or adjacent organs, paraneoplastic manifestations of some tumors, tumor-induced dys-regulation of metabolism, radio-, bio- and chemo-therapeutics, disturbance of autonomous nerve system because of physical pain and psychological sufferings, chronic inflammation typical of most tumors, and surgical interventions among others...
November 7, 2017: Gene
https://www.readbyqxmd.com/read/29108260/angiotensin-converting-enzyme-2-overexpression-improves-atrial-electrical-remodeling-through-trpm7-signaling-pathway
#3
Tingquan Zhou, Zhihua Han, Jun Gu, Shaojie Chen, Yuqi Fan, Huili Zhang, Yuehui Yin, Junfeng Zhang, Changqian Wang
Atrial electrical remodeling is an important factor in the development and persistence of atrial fibrillation. The aim of this study was to examine the effects of atrial angiotensin-converting enzyme-2 overexpression on atrial electrical remodeling and to elucidate the molecular mechanisms underlying these effects. Twenty-eight male and female dogs were randomly divided into the following 4 groups: a sham-operation group, a control group, an adenovirus-enhanced green fluorescent protein (Ad-EGFP) gene group and an Ad-ACE2 gene group...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29101170/the-prorenin-receptor-in-the-cardiovascular-system-and-beyond
#4
Matthew T Hennrikus, Alexis A Gonzalez, Minolfa C Prieto
Since the prorenin receptor (PRR) was first reported, investigations into its role in many cellular processes have been underway. Renin and prorenin binding to PRR and its soluble form (sPRR) increases angiotensin I formation and intracellular pathways resulting in induction of profibrotic factors. The PRR has supplementary roles as a vital accessory protein of the vacuolar-type H+-ATPase and also as an intermediate in Wnt signaling. As a component of the H-ATPase, the PRR has been found upregulated during cardiac stress...
November 3, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29052299/a-functional-variant-in-the-promoter-region-regulates-the-c-reactive-protein-gene-and-is-a-potential-candidate-for-increased-risk-of-atrial-fibrillation
#5
(no author information available yet)
No abstract text is available yet for this article.
November 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29050564/a-missense-variant-in-plec-increases-risk%C3%A2-of-atrial-fibrillation
#6
Rosa B Thorolfsdottir, Gardar Sveinbjornsson, Patrick Sulem, Anna Helgadottir, Solveig Gretarsdottir, Stefania Benonisdottir, Audur Magnusdottir, Olafur B Davidsson, Sridharan Rajamani, Dan M Roden, Dawood Darbar, Terje R Pedersen, Marc S Sabatine, Ingileif Jonsdottir, David O Arnar, Unnur Thorsteinsdottir, Daniel F Gudbjartsson, Hilma Holm, Kari Stefansson
BACKGROUND: Genome-wide association studies (GWAS) have yielded variants at >30 loci that associate with atrial fibrillation (AF), including rare coding mutations in the sarcomere genes MYH6 and MYL4. OBJECTIVES: The aim of this study was to search for novel AF associations and in doing so gain insights into the mechanisms whereby variants affect AF risk, using electrocardiogram (ECG) measurements. METHODS: The authors performed a GWAS of 14,255 AF cases and 374,939 controls, using whole-genome sequence data from the Icelandic population, and tested novel signals in 2,002 non-Icelandic cases and 12,324 controls...
October 24, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29036603/identification-of-optimal-reference-genes-for-transcriptomic-analyses-in-normal-and-diseased-human-heart
#7
Cristina E Molina, Eric Jacquet, Prishila Ponien, Christian Muñoz-Guijosa, Istvan Baczkó, Lars S Maier, Patrick Donzeau-Gouge, Dobromir Dobrev, Rodolphe Fischmeister, Anne Garnier
Aims: Quantitative real-time RT-PCR (RT-qPCR) has become the method of choice for mRNA quantification, but requires an accurate normalization based on the use of reference genes showing invariant expression across various pathological conditions. Only few data exist on appropriate reference genes for the human heart. The objective of this study was to determine a set of suitable reference genes in human atrial and ventricular tissues, from right and left cavities in control and in cardiac diseases...
September 22, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29034898/generation-of-induced-pluripotent-stem-cells-ipsc-from-an-atrial-fibrillation-patient-carrying-a-pitx2-p-m200v-mutation
#8
Cristina Mora, Marialaura Serzanti, Alessio Giacomelli, Silvia Beltramone, Eleonora Marchina, Valeria Bertini, Giovanna Piovani, Lena Refsgaard, Morten Salling Olesen, Venusia Cortellini, Patrizia Dell'Era
Atrial fibrillation (AF) is the most common sustained arrhythmia associated with several cardiac risk factors, but increasing evidences indicated a genetic component. Indeed, genetic variations of the specific PITX2 gene have been identified in patients with early-onset AF. To investigate the molecular mechanisms underlying AF, we reprogrammed to pluripotency polymorphonucleated leukocytes isolated from the blood of a patient carrying a PITX2 p.M200V mutation, using a commercially available non-integrating expression system...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29034891/generation-of-induced-pluripotent-stem-cells-ipsc-from-an-atrial-fibrillation-patient-carrying-a-kcna5-p-d322h-mutation
#9
Cristina Mora, Marialaura Serzanti, Alessio Giacomelli, Valentina Turco, Eleonora Marchina, Valeria Bertini, Giovanna Piovani, Giulia Savio, Lena Refsgaard, Morten Salling Olesen, Venusia Cortellini, Patrizia Dell'Era
Atrial fibrillation (AF) is the most common sustained arrhythmia associated with several cardiac risk factors, but increasing evidences indicated a genetic component. Indeed, genetic variations of the atrial specific KCNA5 gene have been identified in patients with early-onset lone AF. To investigate the molecular mechanisms underlying AF, we reprogrammed to pluripotency polymorphonucleated leukocytes isolated from the blood of a patient carrying a KCNA5 p.D322H mutation, using a commercially available non-integrating system...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29018034/a-distinct-cellular-basis-for-early-cardiac-arrhythmias-the-cardinal-manifestation-of-arrhythmogenic-cardiomyopathy-and-the-skin-phenotype-of-cardiocutaneous-syndromes
#10
Jennifer Karmouch, Qiong Q Zhou, Christina Y Miyake, Raffaella Lombardi, Kai Kretzschmar, Marie Bannier-Hélaouët, Hans Clevers, Xander H Wehrens, James T Willerson, Ali J Marian
Rationale: Arrhythmogenic cardiomyopathy (ACM) is caused primarily by mutations in genes encoding desmosome proteins. Ventricular arrhythmias are the cardinal and typically early manifestations, whereas myocardial fibroadiposis is the pathological hallmark. Homozygous DSP (desmoplakin) and JUP (plakoglobin) mutations are responsible for a subset of ACM patients that exhibit cardiac arrhythmias and dysfunction, palmo-planter keratosis, and hair abnormalities (cardiocutaneous syndromes). Objective: To determine phenotypic consequences of deletion of Dsp in a subset of cells common to the heart and skin...
October 10, 2017: Circulation Research
https://www.readbyqxmd.com/read/28981946/-association-of-kcne1-and-kcne4-gene-polymorphisms-with-atrial-fibrillation-among-uygur-and-han-chinese-populations-in-xinjiang
#11
Haijun Miao, Xiaohui Zhou, Keyimu Kabinur, Ting Zou, Abulizi Palida, Baopeng Tang
OBJECTIVE: To assess the association of KCNE1 (rs1805127) and KCNE4 (rs12621643) polymorphisms with atrial fibrillation (AF) among ethnic Uygur and Han Chinese in Xinjiang. METHODS: A case-control study was carried out. The patients and controls were selected based on ethnicity, gender and age with an 1:1 ratio. DNA was extracted from peripheral blood samples. Genotypes of KCNE1 (rs1805127) and KCNE4 (rs12621643) were determined with a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay...
October 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28975638/the-roles-of-alcohol-dehydrogenase-in-patients-with-atrial-fibrillation
#12
Yu-Feng Hu, Yao-Ting Chang, Yenn-Jiang Lin, Shih-Lin Chang, Li-Wei Lo, Yen-Hua Huang, Tze-Tze Liu, Che-Hong Chen, Ta-Chuan Tuan, Tze-Fan Chao, Fa-Po Chung, Jo-Nan Liao, Abigail Louise D Te, Chi-Ying F Huang, Shih-Ann Chen
BACKGROUND: Alcohol consumption is known to increase the risk of atrial fibrillation (AF). Whether the genotypes of alcohol-metabolizing genes (alcohol dehydrogenase [ADH1B]) are associated with the risk of AF recurrence after catheter ablation remains unclear. METHODS AND RESULTS: The ADH1B genotypes of 281 patients who received catheter ablation for AF were examined. We followed this group of patients to monitor their AF recurrence. Alcohol consumption levels of this cohort were evaluated before and after catheter ablation...
October 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28974514/diminished-prrx1-expression-is-associated-with-increased-risk-of-atrial-fibrillation-and-shortening-of-the-cardiac-action-potential
#13
Nathan R Tucker, Elena V Dolmatova, Honghuang Lin, Rebecca R Cooper, Jiangchuan Ye, William J Hucker, Heather S Jameson, Victoria A Parsons, Lu-Chen Weng, Robert W Mills, Moritz F Sinner, Maxim Imakaev, Jordan Leyton-Mange, Gus Vlahakes, Emelia J Benjamin, Kathryn L Lunetta, Steven A Lubitz, Leonid Mirny, David J Milan, Patrick T Ellinor
BACKGROUND: Atrial fibrillation (AF) affects over 33 million individuals worldwide. Genome-wide association studies have identified at least 30 AF loci, but the mechanisms through which individual variants lead to altered disease risk have remained unclear for the majority of these loci. At the 1q24 locus, we hypothesized that the transcription factor PRRX1 could be a strong candidate gene as it is expressed in the pulmonary veins, a source of AF in many individuals. We sought to identify the molecular mechanism, whereby variation at 1q24 may lead to AF susceptibility...
October 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/28965168/cardiac-arrhythmias-related-to-sodium-channel-dysfunction
#14
Eleonora Savio-Galimberti, Mariana Argenziano, Charles Antzelevitch
The voltage-gated cardiac sodium channel (Nav1.5) is a mega-complex comprised of a pore-forming α subunit and 4 ancillary β-subunits together with numerous protein partners. Genetic defects in the form of rare variants in one or more sodium channel-related genes can cause a loss- or gain-of-function of sodium channel current (INa) leading to the manifestation of various disease phenotypes, including Brugada syndrome, long QT syndrome, progressive cardiac conduction disease, sick sinus syndrome, multifocal ectopic Purkinje-related premature contractions, and atrial fibrillation...
October 1, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28962160/effect-of-eicosapentaenoic-acid-and-pitavastatin-on-electrophysiology-and-anticoagulant-gene-expression-in-mice-with-rapid-atrial-pacing
#15
Maoqing Tong, Jiewen Wang, Yunxin Ji, Xiaomin Chen, Jieru Wang, Shuangshuang Wang, Liemin Ruan, Hanbin Cui, Ying Zhou, Qingyu Zhang, Eiichi Watanabe
Atrial remodeling is considered to be any persistent change in atrial structure or function, and is responsible for the development and perpetuation of atrial fibrillation (AF). Oxidative stress and intracellular pH regulation may also be linked to AF; however it remains unclear whether eicosapentaenoic acid (EPA) or statins have beneficial therapeutic effects. The aim of the present study was to investigate the effects of EPA and pitavastatin on the electrophysiology of and gene expressions in mice with rapidly-paced atria...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28933293/micrornas-in-atrial-fibrillation
#16
Alexandros Briasoulis, Shikha Sharma, Tesfaye Telila, Sagar Mallikethi-Reddy, Nikolaos Papageorgiou, Evangelos Oikonomou, Dimitris Tousoulis
microRNAs (miRNAs) are small non-coding RNAs, involved in regulation of post-transcriptional gene expression. They exert key role not only in physiology and normal development of the cardiovascular system but also in cardiovascular disease development and progression. Recent animal and human studies of tissue specific miRNAs have suggested a role in structural and electrical remodeling in atrial fibrillation (AF). Their emerging role as biomarkers and potential therapeutic targets in patients with AF is discussed in this review...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28928995/acute-unilateral-renal-infarction-in-the-setting-of-an-inherited-thrombophilia-and-atrial-septal-defect
#17
Siavash Piran, Sam Schulman
We present a case of renal infarction in a 43-year-old female with history of stroke at age 14. She was found to be heterozygous for the prothrombin G20210A gene mutation. Loop monitoring revealed no atrial fibrillation. Transthoracic and transesophageal echocardiograms showed no thrombus. However, there was a small shunt due to an atrial septal defect (ASD). She was treated with warfarin and had device closure of her ASD. This was a suspected case of paradoxical embolism through an ASD leading to renal infarction...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/28925907/atrial-fibrillation-ablation-increases-inflammation-chemokine-modulation-suppresses-activation-of-leukocytes-isolated-after-ablation
#18
Alexandra Lucas, Mohammad Al-Ani, Sriram Ambadapadi, Jordan R Yaron, Donghang Zheng, Adisson Fortunel, Maia Doroton-Guevara, Liying Liu, Sufi Morshed, Jay Fricker, William Miles, Matthew McKillop
AIMS: Atrial fibrillation (AF) ablation is associated with increased circulating markers of inflammation. Innate immune, or inflammation, pathways up-regulate mononuclear cell responses and may increase risk for recurrent arrhythmia. Chemokines and serine protease coagulation pathways both activate innate immune responses. Here, we measured inflammatory markers in peripheral blood samples from patients after cryoballoon and/or radiofrequency pulmonary vein isolation and assessed the capacity for inhibition of chemokine and serine protease pathways to block cell activation...
September 18, 2017: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/28915649/digoxin-induced-anemia-among-patients-with-atrial-fibrillation-and-heart-failure-clinical-data-analysis-and-drug-gene-interaction-network
#19
Yubi Lin, Siqi He, Ruiling Feng, Zhe Xu, Wanqun Chen, Zifeng Huang, Yang Liu, Qianhuan Zhang, Bin Zhang, Kejian Wang, Shulin Wu
Digoxin is widely used to treat various heart conditions. In order to clarify the association between digoxin and anemia adverse reaction, we inspected case reports submitted to the FDA Adverse Event Reporting System (FAERS) between January 2004 and December 2015. These reports involved 75618 atrial fibrillation patients and 15699 heart failure patients. Compared to other therapies, digoxin treatment was significantly more likely to be concurrent with anemia adverse reaction among both atrial fibrillation patients (pooled OR = 1...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28912181/hypertrophic-cardiomyopathy-genetics-pathogenesis-clinical-manifestations-diagnosis-and-therapy
#20
REVIEW
Ali J Marian, Eugene Braunwald
Hypertrophic cardiomyopathy (HCM) is a genetic disorder that is characterized by left ventricular hypertrophy unexplained by secondary causes and a nondilated left ventricle with preserved or increased ejection fraction. It is commonly asymmetrical with the most severe hypertrophy involving the basal interventricular septum. Left ventricular outflow tract obstruction is present at rest in about one third of the patients and can be provoked in another third. The histological features of HCM include myocyte hypertrophy and disarray, as well as interstitial fibrosis...
September 15, 2017: Circulation Research
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