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Molecular Genetics & Genomic Medicine

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https://www.readbyqxmd.com/read/29664240/polymorphisms-of-dna-repair-genes-are-associated-with-colorectal-cancer-in-patients-with-lynch-syndrome
#1
Abram B Kamiza, Ling-Ling Hsieh, Reiping Tang, Huei-Tzu Chien, Chih-Hsiung Lai, Li-Ling Chiu, Tsai-Ping Lo, Kuan-Yi Hung, Jeng-Fu You, Wen-Chang Wang, Chao A Hsiung, Chih-Ching Yeh
BACKGROUND: DNA repair genes are crucial for maintaining genomic stability by preventing mutagenesis and carcinogenesis. The present retrospective cohort study aimed at investigating whether MLH1, APEX1, MUTYH, OGG1, NUDT1, XRCC5, XPA, and ERCC2 single nucleotide polymorphisms (SNPs) are associated with colorectal cancer (CRC) in Chinese population with Lynch syndrome. METHODS: From Amsterdam criteria family registry, we identified 270 patients with Lynch syndrome...
April 17, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29654653/identification-of-four-tmc1-variations-in-different-chinese-families-with-hereditary-hearing-loss
#2
Hongyang Wang, Kaiwen Wu, Jing Guan, Ju Yang, Linyi Xie, Fen Xiong, Lan Lan, Dayong Wang, Qiuju Wang
BACKGROUND: Variants in TMC1 (transmembrane channel-like 1) can cause both autosomal dominant and recessive hearing loss in human population. Mice with Tmc1 variants have been shown to be ideal animal models for gene therapy. In this article, we report four TMC1 variants in four different Chinese families and the follow-up auditory phenotype of a previously reported family. METHODS: Four families with TMC1 variants, as well as a previously described family with TMC1 variant orthologous to the Beethoven mouse, were recruited in this study...
April 14, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29649853/phenotypic-characteristics-of-the-p-asn215ser-p-n215s-gla-mutation-in-male-and-female-patients-with-fabry-disease-a-multicenter-fabry-registry-study
#3
Dominique P Germain, Eva Brand, Alessandro Burlina, Franco Cecchi, Scott C Garman, Judy Kempf, Dawn A Laney, Aleš Linhart, László Maródi, Kathy Nicholls, Alberto Ortiz, Federico Pieruzzi, Suma P Shankar, Stephen Waldek, Christoph Wanner, Ana Jovanovic
BACKGROUND: The p.Asn215Ser or p.N215S GLA variant has been associated with late-onset cardiac variant of Fabry disease. METHODS: To expand on the scarce phenotype data, we analyzed natural history data from 125 p.N215S patients (66 females, 59 males) enrolled in the Fabry Registry (NCT00196742) and compared it with data from 401 patients (237 females, 164 males) harboring mutations associated with classic Fabry disease. We evaluated interventricular septum thickness (IVST), left ventricular posterior wall thickness (LVPWT), estimated glomerular filtration rate and severe clinical events...
April 12, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29633571/ercc6l2-associated-inherited-bone-marrow-failure-syndrome
#4
Iren Shabanova, Elisa Cohen, Michaela Cada, Ajoy Vincent, Ronald D Cohn, Yigal Dror
BACKGROUND: ERCC6L2-associated disorder has recently been described and only five patients were reported so far. The described phenotype included bone marrow, cerebral, and craniofacial abnormalities. The aim of this study was to further define the genetic and phenotypic spectrum of the disorder by summarizing the five published cases and an additional case that we identified through whole-exome sequencing performed at the University of Toronto. METHODS: Clinical data was extracted from the Canadian Inherited Marrow Failure Registry...
April 6, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29633566/simple-and-efficient-germline-copy-number-variant-visualization-method-for-the-ion-ampliseq%C3%A2-custom-panel
#5
Shin-Ya Nishio, Hideaki Moteki, Shin-Ichi Usami
BACKGROUND: Recent advances in molecular genetic analysis using next-generation sequencing (NGS) have drastically accelerated the identification of disease-causing gene mutations. Most next-generation sequencing analyses of inherited diseases have mainly focused on single-nucleotide variants and short indels, although, recently, structure variations including copy number variations have come to be considered an important cause of many different diseases. However, only a limited number of tools are available for multiplex PCR-based target genome enrichment...
April 6, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29624921/a-genetic-variant-in-il-15r%C3%AE-correlates-with-physical-activity-among-european-american-adults
#6
Michael Bruneau, Sean Walsh, Eric Selinsky, Garrett Ash, Theodore J Angelopoulos, Priscilla Clarkson, Paul Gordon, Niall Moyna, Paul Visich, Robert Zoeller, Paul Thompson, Heather Gordish-Dressman, Eric Hoffman, Joseph Devaney, Linda S Pescatello
BACKGROUND: Interleukin-15 (IL-15) is a myokine associated with muscle strength, possibly by attenuating protein breakdown. A variant in the alpha-receptor (IL-15Rα 1775 A>C, rs2228059) partially modulates the muscle strength and size response to resistance training. We examined if this polymorphism associated with habitual physical activity among European-American adults. METHODS: Men (n = 240, 23.7 ± 0.3 year, body mass index [BMI] 25.3 ± 0.3 kg/m2 ) and women (n = 292, 23...
April 6, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29624914/fragile-x-checklists-a-meta-analysis-and-development-of-a-simplified-universal-clinical-checklist
#7
Toni Kasole Lubala, Aimé Lumaka, Gray Kanteng, Léon Mutesa, Olivier Mukuku, Stanislas Wembonyama, Randi Hagerman, Oscar Numbi Luboya, Prosper Lukusa Tshilobo
BACKGROUND: Clinical checklists available have been developed to assess the risk of a positive Fragile X syndrome but they include relatively small sample sizes. Therefore, we carried out a meta-analysis that included statistical pooling of study results to obtain accurate figures on the prevalence of clinical predictors of Fragile X syndrome among patients with intellectual disability, thereby helping health professionals to improve their referrals for Fragile X testing. METHODS: All published studies consisting of cytogenetic and/or molecular screening for fragile X syndrome among patients with intellectual disability, were eligible for the meta-analysis...
April 6, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29603904/the-chromosome-18-clinical-resource-center
#8
Jannine D Cody, Minire Hasi-Zogaj, Patricia Heard, Annice Hill, David Rupert, Courtney Sebold, Bridgette Soileau, Daniel E Hale
BACKGROUND: The Chromosome 18 Clinical Research Center has created a pediatrician-friendly virtual resource center for managing patients with chromosome 18 abnormalities. To date, children with rare chromosome abnormalities have been cared for either symptomatically or palliatively as a reaction to the presenting medical problems. As we enter an era of genomic-informed medicine, we can provide children, even those with individually unique chromosome abnormalities, with proactive medical care and management based on the most contemporary data on their specific genomic change...
March 30, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29577677/phase-determination-using-chromosomal-microarray-and-fluorescence-in-situ-hybridization-in-a-patient-with-early-onset-parkinson-disease-and-two-deletions-in-prkn
#9
Eli S Williams, Matthew J Barrett, Radhika Dhamija, Lisa Toran, Chelsea Chambers, Mani S Mahadevan, Wendy L Golden
BACKGROUND: Mutations in the parkin gene (PRKN) are the most commonly identified genetic factors in early onset Parkinson disease (EOPD), with biallelic mutations, resulting in a clinical phenotype. However, normal variation is also common in PRKN, particularly in the form of copy number variation (CNV), challenging interpretation of genetic testing results. Here we report a case of a 29-year-old male with EOPD and two deletions in PRKN detected by chromosomal microarray (CMA). METHODS: The proband was clinically examined by a neurologist for postural instability with frequent falls, bradykinesia, gait freezing with festination, and hypophonia...
March 25, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29575684/new-mutations-and-an-updated-database-for-the-patched-1-ptch1-gene
#10
Marie G Reinders, Antonius F van Hout, Betûl Cosgun, Aimée D Paulussen, Edward M Leter, Peter M Steijlen, Klara Mosterd, Michel van Geel, Johan J Gille
BACKGROUND: Basal cell nevus syndrome (BCNS) is an autosomal dominant disorder characterized by multiple basal cell carcinomas (BCCs), maxillary keratocysts, and cerebral calcifications. BCNS most commonly is caused by a germline mutation in the patched-1 (PTCH1) gene. PTCH1 mutations are also described in patients with holoprosencephaly. METHODS: We have established a locus-specific database for the PTCH1 gene using the Leiden Open Variation Database (LOVD). We included 117 new PTCH1 variations, in addition to 331 previously published unique PTCH1 mutations...
March 25, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29573576/toward-clinical-and-molecular-understanding-of-pathogenic-variants-in-the-zbtb18-gene
#11
Vyne van der Schoot, Sonja de Munnik, Hanka Venselaar, Mariet Elting, Grazia M S Mancini, Conny M A Ravenswaaij-Arts, Britt-Marie Anderlid, Han G Brunner, Servi J C Stevens
BACKGROUND: Patients with pathogenic variants in ZBTB18 present with Intellectual Disability (ID) with frequent co-occurrence of corpus callosum (CC) anomalies, hypotonia, microcephaly, growth problems and variable facial dysmorphologies. These features illustrate a key role for ZBTB18 in brain development. METHODS: Patients with a pathogenic variant in ZBTB18 were detected by diagnostic whole exome sequencing (WES) performed in our center. We reviewed the literature and used GeneMatcher to include other cases...
March 24, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29573570/a-rapid-and-reliable-chromosome-analysis-method-for-products-of-conception-using-interphase-nuclei
#12
Ramesh Babu, Daniel L Van Dyke, Saurabh Bhattacharya, Vaithilingam G Dev, Mingya Liu, Minjae Kwon, Guangyu Gu, Prasad Koduru, Nagesh Rao, Cynthia Williamson, Ernesto Fuentes, Sarah Fuentes, Stephen Papa, Srikanthi Kopuri, Vandana Lal
BACKGROUND: Karyotype determination has a central role in the genetic workup of pregnancy loss, as aneuploidy (trisomy and monosomy) and polyploidy (triploidy and tetraploidy) are the cause in at least 50% of first trimester, 25% of second trimester, and 11% of third trimester miscarriages. There are several limitations with the current approaches of obtaining a karyotype using traditional cytogenetics, fluorescence in situ hybridization with a limited number of probes, and chromosomal microarray...
March 24, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29573232/structural-variations-causing-inherited-peripheral-neuropathies-a-paradigm-for-understanding-genomic-organization-chromatin-interactions-and-gene-dysregulation
#13
REVIEW
Anthony N Cutrupi, Megan H Brewer, Garth A Nicholson, Marina L Kennerson
Inherited peripheral neuropathies (IPNs) are a clinically and genetically heterogeneous group of diseases affecting the motor and sensory peripheral nerves. IPNs have benefited from gene discovery and genetic diagnosis using next-generation sequencing with over 80 causative genes available for testing. Despite this success, up to 50% of cases remain genetically unsolved. In the absence of protein coding mutations, noncoding DNA or structural variation (SV) mutations are a possible explanation. The most common IPN, Charcot-Marie-Tooth neuropathy type 1A (CMT1A), is caused by a 1...
March 23, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29536651/neurobehavioral-features-in-individuals-with-kabuki-syndrome
#14
Cristina Caciolo, Paolo Alfieri, Giorgia Piccini, Maria Cristina Digilio, Francesca Romana Lepri, Marco Tartaglia, Deny Menghini, Stefano Vicari
BACKGROUND: Kabuki syndrome (KS) is a disorder characterized by multiple congenital anomalies affecting development and function of multiple systems. Over the years, researchers have attempted to characterize the neurobehavioral phenotype of KS in cohorts of patients enrolled on the basis of clinical assessment. The availability of molecular testing now allows for recruitment of patients with confirmed KS due to KMT2D and KDM6A. METHODS: The aims of the present study were to investigate the neuropsychological and behavioral profiles of individuals with molecularly confirmed diagnosis of KS, and determine the extent of heterogeneity occurring in these profiles between individuals with clinical diagnosis of KS with and without mutations in KMT2D...
March 13, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29529714/analysis-of-mutations-in-ext1-and-ext2-in-brazilian-patients-with-multiple-osteochondromas
#15
Savana C L Santos, Isabela M P O Rizzo, Reinaldo I Takata, Carlos E Speck-Martins, Jaime M Brum, Claudio Sollaci
BACKGROUND: Multiple osteochondromas is a dysplasia characterized by growth of two or more osteochondromas. It is genetically heterogeneous, caused by pathogenic variants in EXT1 or EXT2 genes in 70%-90% of patients. The EXT1 is more often mutated than EXT2 gene, with a variable prevalence between populations. There are no data about EXT1 and EXT2 pathogenic variants in patients with multiple osteochondromas in Brazilian population. The aim of this survey is to characterize these to determine the genotype profile of this population...
March 12, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29526034/dyssegmental-dysplasia-silverman-handmaker-type-a-challenging-antenatal-diagnosis-in-a-dizygotic-twin-pregnancy
#16
Shuaa Basalom, Yannis Trakadis, Roberta Shear, Michel E Azouz, Isabelle De Bie
BACKGROUND: Dyssegmental dysplasia Silverman-Handmaker (DDSH; MIM 224410) type is an extremely rare skeletal dysplasia caused by functional null mutations in the perlecan gene. Less than forty cases are reported in the literature, of which only four were prenatally detected. METHODS: We report on a dizygotic twin pregnancy from consanguineous parents for which one of the twins presented prenatally with severe micromelia, limb bowing and scoliosis, and postnatally with clinical and radiological features compatible with a diagnosis of dyssegmental dysplasia...
March 11, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29512331/dentinogenesis-imperfecta-type-ii-genotype-and-phenotype-analyses-in-three-danish-families
#17
Kawther Taleb, Eva Lauridsen, Jette Daugaard-Jensen, Pekka Nieminen, Sven Kreiborg
BACKGROUND: Dentinogenesis imperfecta (DI) is a rare debilitating hereditary disorder affecting dentin formation and causing loss of the overlying enamel. Clinically, DI sufferers have a discolored and weakened dentition with an increased risk of fracture. The aims of this study were to assess genotype-phenotype findings in three families with DI-II with special reference to mutations in the DSPP gene and clinical, histological, and imaging manifestations. METHODS: Nine patients participated in the study (two from family A, four from family B, and three from family C)...
March 6, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29500860/proliferative-vasculopathy-and-hydranencephaly-hydrocephaly-syndrome-or-fowler-syndrome-report-of-a-family-and-insight-into-the-disease-s-mechanism
#18
Francesca Clementina Radio, Lavinia Di Meglio, Emanuele Agolini, Emanuele Bellacchio, Martina Rinelli, Paolo Toscano, Renata Boldrini, Antonio Novelli, Aniello Di Meglio, Bruno Dallapiccola
BACKGROUND: Fowler syndrome is a rare autosomal recessive disorder characterized by hydranencephaly-hydrocephaly and multiple pterygium due to fetal akinesia. To date, around 45 cases from 27 families have been reported, and the pathogenic bi-allelic mutations in FLVCR2 gene described in 15 families. The pathogenesis of this condition has not been fully elucidated so far. METHODS: We report on an additional family with two affected fetuses carrying a novel homozygous mutation in FLVCR2 gene, and describe the impact of known mutants on the protein structural and functional impairment...
March 3, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29490426/demonstration-of-a-novel-xp22-2-microdeletion-as-the-cause-of-familial-extreme-skewing-of-x-inactivation-utilizing-case-parent-trio-snp-microarray-analysis
#19
Jane A Mason, Hnin T Aung, Adayapalam Nandini, Rickie G Woods, David J Fairbairn, John A Rowell, David Young, Rachel D Susman, Simon A Brown, Valentine J Hyland, Jeremy D Robertson
BACKGROUND: We report a kindred referred for molecular investigation of severe hemophilia A in a young female in which extremely skewed X-inactivation was observed in both the proband and her clinically normal mother. METHODS: Bidirectional Sanger sequencing of all F8 gene coding regions and exon/intron boundaries was undertaken. Methylation-sensitive restriction enzymes were utilized to investigate skewed X-inactivation using both a classical human androgen receptor (HUMARA) assay, and a novel method targeting differential methylation patterns in multiple informative X-chromosome SNPs...
February 28, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29460367/genetics-in-macedonia-following-the-international-trends
#20
Elena Sukarova-Angelovska, Aleksandar Petlichkovski
Genetics in Macedonia-Following the international trends.
February 20, 2018: Molecular Genetics & Genomic Medicine
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