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Molecular Genetics & Genomic Medicine

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https://www.readbyqxmd.com/read/30516030/intra-patient-variability-of-heteroplasmy-levels-in-urinary-epithelial-cells-in-carriers-of-the-m-3243a-g-mutation
#1
Paul de Laat, Richard J Rodenburg, Jan A M Smeitink, Mirian C H Janssen
BACKGROUND: The mitochondrial DNA m.3243A>G mutation is one the most prevalent mutation causing mitochondrial disease in adult patients. Several cohort studies have used heteroplasmy levels in urinary epithelial cells (UEC) to correlate the genotype of the patients to the clinical severity. However, the interpretation of these data is hampered by a lack of knowledge on the intra-patient variability of the heteroplasmy levels. The goal of this study was to determine the day-to-day variation of the heteroplasmy levels in UEC...
December 4, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30485715/autosomal-dominant-marfan-syndrome-caused-by-a-previously-reported-recessive-fbn1-variant
#2
Eline Overwater, Rifka Efrat, Daniela Q C M Barge-Schaapveld, Phillis Lakeman, Marjan M Weiss, Alessandra Maugeri, J Peter van Tintelen, Arjan C Houweling
BACKGROUND: Pathogenic variants in FBN1 cause autosomal dominant Marfan syndrome but can also be found in patients presenting with apparently isolated features of Marfan syndrome. Moreover, several families with autosomal recessive Marfan syndrome caused by pathogenic variants in FBN1 have been described. The aim of this report was to underline the clinical variability that can be associated with the pathogenic variant c.1453C>T, p.(Arg485Cys) in FBN1. METHODS: We provide the clinical details of two autosomal dominant families with this specific FBN1 variant, which was previously associated with autosomal recessive Marfan syndrome...
November 28, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30484961/retrotransposon-insertion-as-a-novel-mutational-event-in-bardet-biedl-syndrome
#3
Erika Tavares, Chen Yu Tang, Anjali Vig, Shuning Li, Gail Billingsley, Wilson Sung, Ajoy Vincent, Bhooma Thiruvahindrapuram, Elise Héon
BACKGROUND: Bardet-Biedl syndrome (BBS) is an autosomal recessive pleiotropic disorder of the primary cilia that leads to severe visual loss in the teenage years. Approximately 80% of BBS cases are explained by mutations in one of the 21 identified genes. Documented causative mutation types include missense, nonsense, copy number variation (CNV), frameshift deletions or insertions, and splicing variants. METHODS: Whole genome sequencing was performed on a patient affected with BBS for whom no mutations were identified using clinically approved genetic testing of the known genes...
November 28, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30474316/prenatal-diagnosis-of-familial-exudative-vitreoretinopathy-and-norrie-disease
#4
Jingjing Liu, Jing Zhu, Jiyun Yang, Xiang Zhang, Qi Zhang, Peiquan Zhao
BACKGROUND: Both familial exudative vitreoretinopathy (FEVR) and Norrie disease (ND) are hereditary retinal disorders which can cause severe visual impairment and blindness at a young age. The present study aimed to report the use of antenatal genetic testing and ultrasound in the diagnosis and counseling of FEVR and ND. METHODS: Amniocentesis and ultrasonography were performed in high-risk mothers, with children having FEVR or ND, to predict severe ocular abnormalities...
November 25, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30474315/gene-coexpression-network-analysis-identified-potential-biomarkers-in-gestational-diabetes-mellitus-progression
#5
Xiaomin Zhao, Wen Li
BACKGROUND: Gestational diabetes mellitus (GDM) is one of the most common problems during pregnancy. Lack of international consistent diagnostic procedures has limit improvement of current therapeutic effectiveness. Here, we aimed to screen potential gene biomarkers that might play vital roles in GDM progression for assistance of its diagnostic and treatment. METHODS: Gene expression profiles in four GDM placentae at first trimester, four GDM placentae at second trimester, and four normal placentae were obtained from the publicly available Gene Expression Omnibus (GEO)...
November 25, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30461224/infertility-in-a-man-with-oligoasthenozoospermia-associated-with-mosaic-chromosome-22q11-deletion
#6
Yanyan Liu, Hongmei Zhu, Xuan Zhang, Ting Hu, Zhu Zhang, Jing Wang, Yi Lai, Jiemei Zheng, Dan Xie, Bei Xia, Li Qin, Liangyu Xie, Shanling Liu, He Wang, Huaqin Sun
BACKGROUND: A 30-year-old oligoasthenozoospermia man was found to have unbalance mosaic translocation between chromosome 22 and four other chromosomes (5, 6, 13, and 15) during the investigations for a couple with infertility for 3 years, which is a rare event in human pathology. METHODS: Classical cytogenetics analysis, fluorescence in situ hybridization (FISH), and chromosome microarray analyses (CMA) were performed on peripheral blood lymphocytes; copy number variation sequencing (CNV-Seq) analysis was performed on sperm DNA...
November 20, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30460760/the-impact-of-genetic-variants-in-il1r2-on-cervical-cancer-risk-among-uygur-females-from-china-a-case-control-study
#7
Fanglin Niu, Tianchang Wang, Jing Li, Mengdan Yan, Dianzhen Li, Bin Li, Tianbo Jin
BACKGROUND: Disordered inflammation and immune response is an acknowledged risk factor for cervical cancer development. Interleukin-1 receptor type 2 (IL1R2) is a decoy receptor for IL-1 cytokines and involved in host inflammatory and immune progression which could lead to the lesion and neoplasia of cervix. In this study, we aimed to evaluate the relationships between IL1R2 polymorphisms and cervical cancer risk in Uygur females from China. METHODS: In this case-control study, genotypes of six selected variants (rs11674595, rs4851527, rs719250, rs3218896, rs3218977, and rs2072472) distributed in IL1R2 were detected among 247 cervical cancer patients and 286 healthy controls with the usage of an Agena MassARRY method...
November 20, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30450799/dmd-open-access-variant-explorer-dove-a-scalable-open-access-web-based-tool-to-aid-in-clinical-interpretation-of-genetic-variants-in-the-dmd-gene
#8
Mitchell Bailey, Nicole Miller
BACKGROUND: Duchenne muscular dystrophy (Duchenne) is caused by pathogenic variants in the DMD gene. Antisense oligonucleotides (AONs) are one emerging precision medicine treatment for Duchenne. DMD molecular genetic testing results guide precision-therapy molecular eligibility, requiring healthcare providers to perform analyses currently uncommon in clinical laboratory and medical practices. Clear DMD variant notation and interpretation are key components of clinical care with the availability of precision medicine...
November 18, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30450785/compound-heterozygous-mutations-in-cftr-causing-cbavd-in-chinese-pedigrees
#9
Bin Yang, Xi Wang, Wei Zhang, Hongjun Li, Binbin Wang
BACKGROUND: Congenital bilateral absence of the vas deferens (CBAVD) is an important cause of obstructive azoospermia and male infertility. Mutations of CFTR caused the majority of CBAVD cases, and ADGRG2 was recently identified as a new pathogenic gene. Yet, most of the genetic evidence came from sporadic cases, and only one mutation in CFTR can be found in patients. METHODS: In present study, we collected two CBAVD pedigrees, each having two affected male siblings...
November 18, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30450770/dysfunctional-dna-repair-pathway-via-defective-fancd2-gene-engenders-multifarious-exomic-and-transcriptomic-effects-in-fanconi-anemia
#10
Karthik Raja Velmurugan, Pawel Michalak, Lin Kang, Natalie C Fonville, Harold R Garner
BACKGROUND: Fanconi anemia (FA) affects only one in 130,000 births, but has severe and diverse clinical consequences. It has been theorized that defects in the FA DNA cross-link repair complex lead to a spectrum of variants that are responsible for those diverse clinical phenotypes. METHODS: Using NextGen sequencing, we show that a clinically derived FA cell line had accumulated numerous genetic variants, including high-impact mutations, such as deletion of start codons, introduction of premature stop codons, missense mutations, and INDELs...
November 18, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30447054/mutations-in-stag2-cause-an-x-linked-cohesinopathy-associated-with-undergrowth-developmental-delay-and-dysmorphia-expanding-the-phenotype-in-males
#11
Sureni V Mullegama, Steven D Klein, Rebecca H Signer, Eric Vilain, Julian A Martinez-Agosto
BACKGROUND: The cohesin complex is a multi-subunit protein complex which regulates sister chromatid cohesion and separation during cellular division. In addition, this evolutionarily conserved protein complex plays an integral role in DNA replication, DNA repair, and the regulation of transcription. The core complex is composed of four subunits: RAD21, SMC1A, SMC3, and STAG1/2. Mutations in these proteins have been implicated in human developmental disorders collectively termed "cohesinopathies...
November 16, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30417580/time-estimations-by-network-of-beta-globin-gene-cluster-haplotypes-linked-with-hb-d-los-angeles-%C3%AE-121-gh4-glu-%C3%A2-gln-gaa-%C3%A2-caa-mutation-in-the-world-populations
#12
Onur Ozturk, Sanem Arikan, Ayfer Atalay, Erol O Atalay
BACKGROUND: β-Globin gene cluster haplotypes associated with the Hb D-Los Angeles mutation have been reported in many different locations in different populations including Italy, Iran, Thailand, Belgium, Mexico, Holland, and Turkey. In this study, we have identified genetic relationships and formation periods between the haplotypes reported in the world regarding the Hb D-Los Angeles. METHODS: We comparatively analyzed the RFLP (restriction fragment length polymorphism) data in Denizli region and world populations using Arlequin 3...
November 11, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30415495/whole-exome-sequencing-identifies-novel-predisposing-genes-in-neural-tube-defects
#13
Philippe Lemay, Patrizia De Marco, Monica Traverso, Elisa Merello, Alexandre Dionne-Laporte, Dan Spiegelman, Édouard Henrion, Ousmane Diallo, François Audibert, Jacques L Michaud, Armando Cama, Guy A Rouleau, Zoha Kibar, Valeria Capra
BACKGROUND: Neural tube defects (NTD) are among the most common defects affecting 1:1000 births. They are caused by a failure of neural tube closure during development. Their clinical presentation is diverse and dependent on the site and severity of the original defect on the embryonic axis. The etiology of NTD is multifactorial involving environmental factors and genetic variants that remain largely unknown. METHODS: We have conducted a whole exome sequencing (WES) study in five new NTD families and pooled the results with WES data from three NTD families and 43 trios that were previously investigated by our group...
November 10, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30415494/return-of-secondary-findings-in-genomic-sequencing-military-implications
#14
Lydia D Hellwig, Clesson Turner, Teri A Manolio, Mark Haigney, Cynthia A James, Brittney Murray, Dale F Szpisjak, Sheila Muldoon, Juvianee Estrada-Veras, Alyson Krokosky, Mauricio J De Castro
BACKGROUND: Genomic sequencing has become a widely used tool in clinical and research settings in both civilian and military healthcare systems. METHODS: In this paper, we consider potential military-specific implications of returning genomic sequencing secondary findings to ensure the proper protections, policies, and processes are in place for the use of this information. RESULTS: We specifically use two examples to highlight potential military implications of the return of secondary findings...
November 10, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30411541/associations-of-genetic-variants-in-endocytic-trafficking-of-epidermal-growth-factor-receptor-super-pathway-with-risk-of-nonsyndromic-cleft-lip-with-or-without-cleft-palate
#15
Bing Li, Lan Ma, Chi Zhang, Zhixuan Zhou, Hua Yuan, Hongbing Jiang, Yongchu Pan, Qian Tan
BACKGROUND: The genetic etiology of nonsyndromic cleft lip with or without cleft palate (NSCL/P) has not been fully clarified to date. Epidermal growth factor receptor (EGFR) was reportedly involved in its biological establishment and regulation of cell migration during the embryonic stage. METHODS: We selected a super pathway of endocytic trafficking of EGFR and investigated the associations of single-nucleotide polymorphisms (SNPs) in the super pathway with the risk of NSCL/P by analyzing our published genome-wide association study (GWAS) data from 504 NSCL/P individuals and 455 controls...
November 8, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30411539/microrna-590-3p-inhibits-trophoblast-dependent-maternal-spiral-artery-remodeling-by-repressing-low-density-lipoprotein-receptor-related-protein-6
#16
Yinghong Zhang, Xianzhen Pan, Xiaoyan Yu, Lei Li, Hongmei Qu, Shuhong Li
BACKGROUND: The remodeling of maternal spiral artery following embryo implantation, which relies on well-regulated trophoblast functions, is a pivotal process to ensure a successful pregnancy. Low-density lipoprotein receptor-related protein 6 (LRP6) and microRNAs (miRNAs, miRs) are suggested to be involved in angiogenesis and several vascular diseases; however, their functions in the control of trophoblast remain elusive. We therefore aimed to examine the roles of LRP6 and miR-590-3p in the regulation of trophoblast during the remodeling of maternal spiral artery...
November 8, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30411536/whole-exome-sequencing-of-nevoid-basal-cell-carcinoma-syndrome-families-and-review-of-human-gene-mutation-database-ptch1-mutation-data
#17
D Matthew Gianferante, Melissa Rotunno, Michael Dean, Weiyin Zhou, Belynda D Hicks, Kathleen Wyatt, Kristine Jones, Mingyi Wang, Bin Zhu, Alisa M Goldstein, Lisa Mirabello
BACKGROUND: Nevoid basal cell carcinoma syndrome (NBCCS) is an autosomal dominant disorder with variable expression and nearly complete penetrance. PTCH1 is the major susceptibility locus and has no known hot spots or genotype-phenotype relationships. METHODS: We evaluated 18 NBCCS National Cancer Institute (NCI) families plus PTCH1 data on 333 NBCCS disease-causing mutations (DM) reported in the Human Gene Mutation Database (HGMD). National Cancer Institute families underwent comprehensive genomic evaluation, and clinical data were extracted from NCI and HGMD cases...
November 8, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30411535/mutation-profile-of-flnc-gene-and-its-prognostic-relevance-in-patients-with-hypertrophic-cardiomyopathy
#18
Hao Cui, Jizheng Wang, Ce Zhang, Guixin Wu, Changsheng Zhu, Bing Tang, Yubao Zou, Xiaohong Huang, Rutai Hui, Lei Song, Shuiyun Wang
BACKGROUND: Filamin C (FLNC) mutation was reported as a cause of HCM, with a high probability of sudden cardiac death. However, the mutation profile of FLNC, and its relationship with phenotypic expression in HCM, remains to be elucidated. METHODS: In this study, FLNC gene was sequenced in 540 HCM patients and 307 healthy controls. RESULTS: We found that 39 (7.2%) patients carried FLNC mutations, with a similar frequency to that of controls (4...
November 8, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30407747/functional-variants-of-the-atg7-gene-promoter-in-acute-myocardial-infarction
#19
Pei Zhang, Jie Zhang, Yexin Zhang, Shuai Wang, Shuchao Pang, Bo Yan
BACKGROUND: Coronary artery disease including acute myocardial infarction (AMI) is mainly caused by atherosclerosis, an inflammatory and metabolic disease. Autophagy has been demonstrated to play critical roles in lipid metabolism and inflammation. Altered autophagic activity has been reported in AMI patients. However, molecular basis for dysfunctional autophagy in AMI remains unexplained. METHODS: In this study, the promoter of the ATG7 gene, encoding a core protein for autophagy, was genetically and functionally analyzed in large cohorts of AMI patients (n = 355) and ethnic-matched healthy controls (n = 363)...
November 8, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/30406974/mitochondrial-and-nuclear-disease-panel-mito-and-panel-combined-sequencing-of-mitochondrial-and-nuclear-dna-by-a-cost-effective-and-sensitive-ngs-based-method
#20
Angela Abicht, Florentine Scharf, Stephanie Kleinle, Ulrike Schön, Elke Holinski-Feder, Rita Horvath, Anna Benet-Pagès, Isabel Diebold
BACKGROUND: The diagnosis of mitochondrial disorders is challenging because of the clinical variability and genetic heterogeneity of these conditions. Next-Generation Sequencing (NGS) technology offers a robust high-throughput platform for nuclear and mitochondrial DNA (mtDNA) analyses. METHOD: We developed a custom Agilent SureSelect Mitochondrial and Nuclear Disease Panel (Mito-aND-Panel) capture kit that allows parallel enrichment for subsequent NGS-based sequence analysis of nuclear mitochondrial disease-related genes and the complete mtDNA genome...
November 8, 2018: Molecular Genetics & Genomic Medicine
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