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BMC Medical Genetics

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https://www.readbyqxmd.com/read/28427360/association-of-novel-polymorphisms-in-tmem39a-gene-with-systemic-lupus-erythematosus-in-a-chinese-han-population
#1
Xinze Cai, Wenyue Huang, Xudong Liu, Lining Wang, Yi Jiang
BACKGROUND: This study aimed to assess the association between 14 single nucleotide polymorphisms (SNPs) in six genes (IRF8, TMEM39A, IKZF3, ORMDL3, GSDMB, and ZPBP2) and systemic lupus erythematosus (SLE) in a Chinese Han population sample. METHODS: We carried out a case-control study of 415 patients with SLE and 470 healthy controls without autoimmune disease or cancer. DNA for genetic analysis was isolated from the blood of all subjects using standard phenol-chloroform method...
April 20, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28403827/a-novel-mutation-in-homeobox-dna-binding-domain-of-hoxc13-gene-underlies-pure-hair-and-nail-ectodermal-dysplasia-ectd9-in-a-pakistani-family
#2
Anwar Kamal Khan, Noor Muhammad, Abdul Aziz, Sher Alam Khan, Khadim Shah, Abdul Nasir, Muzammil Ahmad Khan, Saadullah Khan
BACKGROUND: Pure hair and nail ectodermal dysplasia (PHNED) is a congenital disorder of hair abnormalities and nail dysplasia. Both autosomal recessive and dominant inheritance fashion of PHNED occurs. In literature, to date, five different forms of PHNED have been reported at molecular level, having three genes known and two loci with no gene yet. METHODS: In this study, a four generations consanguineous family of Pakistani origin with autosomal recessive PHNED was investigated...
April 12, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28399814/sirt6-polymorphism-rs117385980-is-associated-with-longevity-and-healthy-aging-in-finnish-men
#3
Katariina Hirvonen, Hannele Laivuori, Jari Lahti, Timo Strandberg, Johan G Eriksson, Peter Hackman
BACKGROUND: Sirtuin-6 (SIRT6) is involved in various crucial cellular pathways, being a key regulator of telomere structure, DNA repair, metabolism, transcriptional control and the NF-kappa B pathway. Sirt6 knock-out mice have been reported to develop typical features of aging and senescence at the age of 2-3 weeks and die within 4 weeks. The aim of this study was to investigate whether sequence variations of SIRT6 are associated with aging and longevity in Finnish men. METHODS: The sample of this study consisted of 43 longer-living and healthy males and 92 male control subjects who have died of natural causes at an average age of 66,6 (±4,1) years and who belonged to the Helsinki Birth Cohort Study (HBCS)...
April 11, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28381238/homozygous-germ-line-mutation-of-the-pms2-mismatch-repair-gene-a-unique-case-report-of-constitutional-mismatch-repair-deficiency-cmmrd
#4
N C Ramchander, N A J Ryan, E J Crosbie, D G Evans
BACKGROUND: Constitutional mismatch repair deficiency syndrome results from bi-allelic inheritance of mutations affecting the key DNA mismatch repair genes: MLH1, MSH2, MSH6 or PMS2. Individuals with bi-allelic mutations have a dysfunctional mismatch repair system from birth; as a result, constitutional mismatch repair deficiency syndrome is characterised by early onset malignancies. Fewer than 150 cases have been reported in the literature over the past 20 years. This is the first report of the founder PMS2 mutation - NM_000535...
April 5, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28376813/clinical-relevance-of-breast-and-gastric-cancer-associated-polymorphisms-as-potential-susceptibility-markers-for-oral-clefts-in-the-brazilian-population
#5
Renato Assis Machado, Edimilson Martins de Freitas, Sibele Nascimento de Aquino, Daniella Reis B Martelli, Mário Sérgio Oliveira Swerts, Silvia Regina de Almeida Reis, Darlene Camati Persuhn, Helenara Salvati Bertolossi Moreira, Verônica Oliveira Dias, Ricardo D Coletta, Hercílio Martelli-Júnior
BACKGROUND: Epidemiological studies have indicated a higher incidence of breast and gastric cancer in patients with nonsyndromic cleft lip with or without cleft palate (NSCL ± P) and their relatives, which can be based on similar genetic triggers segregated within family with NSCL ± P. METHODS: This multicenter study evaluated the association of 9 single nucleotide polymorphisms (SNP) in AXIN2 and CDH1, representing genes consistently altered in breast and gastric tumors, with NSCL ± P in 223 trios (father, mother and patient with NSCL ± P) by transmission disequilibrium test (TDT)...
April 4, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28351343/identification-of-large-genomic-rearrangement-of-brca1-2-in-high-risk-patients-in-korea
#6
Do-Hoon Kim, Hyojin Chae, Irene Jo, Jaeeun Yoo, Hyeyoung Lee, Woori Jang, Joonhong Park, Gun Dong Lee, Dong-Seok Jeon, Keun Ho Lee, Soo Young Hur, Byung Joo Chae, Byung Joo Song, Myungshin Kim, Yonggoo Kim
BACKGROUND: While the majority of germline inactivating mutations in BRCA1/2 are small-scale mutations, large genomic rearrangements (LGRs) are also detected in a variable proportion of patients. However, routine genetic methods are incapable of detecting LGRs, and comprehensive genetic testing algorithm is necessary. METHODS: We performed multiplex ligation-dependent probe amplification assay for small-scale mutation negative patients at high-risk for LGR, based on previously published LGR risk criteria...
March 28, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28347285/whole-exome-sequencing-and-digital-pcr-identified-a-novel-compound-heterozygous-mutation-in-the-nphp1-gene-in-a-case-of-joubert-syndrome-and-related-disorders
#7
Shingo Koyama, Hidenori Sato, Manabu Wada, Toru Kawanami, Mitsuru Emi, Takeo Kato
BACKGROUND: Joubert syndrome and related disorders (JSRD) is a clinically and genetically heterogeneous condition with autosomal recessive or X-linked inheritance, which share a distinctive neuroradiological hallmark, the so-called molar tooth sign. JSRD is classified into six clinical subtypes based on associated variable multiorgan involvement. To date, 21 causative genes have been identified in JSRD, which makes genetic diagnosis difficult. CASE PRESENTATION: We report here a case of a 28-year-old Japanese woman diagnosed with JS with oculorenal defects with a novel compound heterozygous mutation (p...
March 27, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28340560/a-novel-pore-region-mutation-c-887g%C3%A2-%C3%A2-a-p-g296d-in-kcnq4-causing-hearing-loss-in-a-chinese-family-with-autosomal-dominant-non-syndromic-deafness-2
#8
Bangqing Huang, Yanping Liu, Xue Gao, Jincao Xu, Pu Dai, Qingwen Zhu, Yongyi Yuan
BACKGROUND: Hereditary non-syndromic hearing loss is the most common inherited sensory defect in humans. The KCNQ4 channel belongs to a family of potassium ion channels that play crucial roles in physiology and disease. Mutations in KCNQ4 underlie deafness non-syndromic autosomal dominant 2, a subtype of autosomal dominant, progressive, high-frequency hearing loss. METHODS: A six-generation Chinese family from Hebei Province with autosomal dominantly inherited, sensorineural, postlingual, progressive hearing loss was enrolled in this study...
March 24, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28335750/novel-compound-heterozygous-mutations-in-the-otof-gene-identified-by-whole-exome-sequencing-in-auditory-neuropathy-spectrum-disorder
#9
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/28327142/exome-sequencing-identified-rare-variants-in-genes-hspg2-and-atp2b4-in-a-family-segregating-developmental-dysplasia-of-the-hip
#10
Sulman Basit, Alia M Albalawi, Essa Alharby, Khalid I Khoshhal
BACKGROUND: Developmental dysplasia of the hip (DDH) is a common pathological condition of the musculoskeletal system in infants which results in a congenital and developmental malformation of the hip joint. DDH is a spectrum of pathologies affecting the infant hip ranging from asymptomatic subtle radiographic signs through mild instability to frank dislocations with acetabular dysplasia. A Saudi family with three affected individuals with DDH was identified and genetic analysis was performed to detect the possible genetic defect(s) underlying DDH in the affected members of the family...
March 21, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28327087/nt5c2-novel-splicing-variant-expands-the-phenotypic-spectrum-of-spastic-paraplegia-spg45-case-report-of-a-new-member-of-thin-corpus-callosum-spg-subgroup
#11
Mahmoud F Elsaid, Khalid Ibrahim, Nader Chalhoub, Ahmed Elsotouhy, Noora El Mudehki, Alice Abdel Aleem
BACKGROUND: Hereditary Spastic Paraplegia (HSP) is a genetically heterogeneous group of neurodegenerative diseases. Thin Corpus Callosum (TCC) associated HSP is a distinguished subgroup of complex forms. Purines and pyrimidine, the basic DNA and RNA components, are regulating the cell metabolism, having roles in signal transduction, energy preservation and cellular repair. Genetic defects in nucleotide metabolism related genes have been only recently implicated in brain and neurodegenerative diseases' pathogenesis...
March 21, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28320335/mitochondrial-mutations-in-maternally-inherited-hearing-loss
#12
Hideki Mutai, Takahisa Watabe, Kenjiro Kosaki, Kaoru Ogawa, Tatsuo Matsunaga
BACKGROUND: Although the mitochondrial DNA (mtDNA) mutations m.1555A > G and m.3243A > G are the primary causes of maternally inherited sensorineural hearing loss (SNHL), several other mtDNA mutations are also reported to be associated with SNHL. METHODS: Screening of m.1555A > G and m.3243A > G mutations was performed for 145 probands. Nine probands fulfilled the following criteria: 1) bilateral and symmetric SNHL, 2) ≥ 4 family members with SNHL with a maternal trait of inheritance in ≥ 2 generations, 3) onset of SNHL before the age of 40 years, 4) high-frequency SNHL, and 5) no record of environmental factors related to SNHL...
March 20, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28315637/trpm4-non-selective-cation-channel-variants-in-long-qt-syndrome
#13
Thomas Hof, Hui Liu, Laurent Sallé, Jean-Jacques Schott, Corinne Ducreux, Gilles Millat, Philippe Chevalier, Vincent Probst, Romain Guinamard, Patrice Bouvagnet
BACKGROUND: Long QT syndrome (LQTS) is an inherited arrhythmic disorder characterized by prolongation of the QT interval, a risk of syncope, and sudden death. There are already a number of causal genes in LQTS, but not all LQTS patients have an identified mutation, which suggests LQTS unknown genes. METHODS: A cohort of 178 LQTS patients, with no mutations in the 3 major LQTS genes (KCNQ1, KCNH2, and SCN5A), was screened for mutations in the transient potential melastatin 4 gene (TRPM4)...
March 18, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28302064/a-sibship-with-duplication-of-xq28-inherited-from-the-mother-genomic-characterization-and-clinical-outcomes
#14
Dong Keon Yon, Ji Eun Park, Seung Jun Kim, Sung Han Shim, Kyu Young Chae
BACKGROUND: Loss-of-function mutations in methyl-CpG-binding protein 2 (MECP2; MIM *300005) results in the Rett syndrome, whereas gain-of-function mutations are associated with the MECP2 duplication syndrome. METHODS: We did research on a family with two brothers showing Xq28 duplication syndrome using various molecular cytogenetic techniques such as multiplex ligation-dependent probe amplification and array-based genomic hybridization. RESULTS: The duplicated region had several genes including MECP2 and interleukin-1 receptor associated kinase 1 (IRAK1; MIM *300283)...
March 17, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28302057/clinically-proven-mtdna-mutations-are-not-common-in-those-with-chronic-fatigue-syndrome
#15
Elizna M Schoeman, Francois H Van Der Westhuizen, Elardus Erasmus, Etresia van Dyk, Charlotte V Y Knowles, Shereen Al-Ali, Wan-Fai Ng, Robert W Taylor, Julia L Newton, Joanna L Elson
BACKGROUND: Chronic Fatigue Syndrome (CFS) is a prevalent debilitating condition that affects approximately 250,000 people in the UK. There is growing interest in the role of mitochondrial function and mitochondrial DNA (mtDNA) variation in CFS. It is now known that fatigue is common and often severe in patients with mitochondrial disease irrespective of their age, gender or mtDNA genotype. More recently, it has been suggested that some CFS patients harbour clinically proven mtDNA mutations...
March 16, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28298181/early-onset-of-adck4-glomerulopathy-with-renal-failure-a-case-report
#16
Ksenija Lolin, Benedetta D Chiodini, Elise Hennaut, Brigitte Adams, Karin Dahan, Khalid Ismaili
BACKGROUND: We present a rare early presentation of a ADCK4-related glomerulopathy. This case is of interest as potentially treatable if genetic results are timely obtained. CASE PRESENTATION: We report the case of a 5-year-old boy who was identified with significant proteinuria by a urinary routine screening program for school children. Physical examination revealed dysplastic ears and abnormal folded pinna. Albumin level was 41 g/L (39-53 g/L), and urine proteins/creatinine ratio was 2...
March 16, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28298193/identification-of-two-novel-mutations-in-the-slc45a2-gene-in-a-hungarian-pedigree-affected-by-unusual-oca-type-4
#17
Lola Tóth, Beáta Fábos, Katalin Farkas, Adrienn Sulák, Kornélia Tripolszki, Márta Széll, Nikoletta Nagy
BACKGROUND: Oculocutaneous albinism (OCA) is a clinically and genetically heterogenic group of pigmentation abnormalities. OCA type IV (OCA4, OMIM 606574) develops due to homozygous or compound heterozygous mutations in the solute carrier family 45, member 2 (SLC45A2) gene. This gene encodes a membrane-associated transport protein, which regulates tyrosinase activity and, thus, melanin content by changing melanosomal pH and disrupting the incorporation of copper into tyrosinase. METHODS: Here we report two Hungarian siblings affected by an unusual OCA4 phenotype...
March 15, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28292286/exome-sequencing-identifies-a-novel-ttc37-mutation-in-the-first-reported-case-of-trichohepatoenteric-syndrome-the-s-in-south-africa
#18
Craig Kinnear, Brigitte Glanzmann, Eric Banda, Nikola Schlechter, Glenda Durrheim, Annika Neethling, Etienne Nel, Mardelle Schoeman, Glynis Johnson, Paul D van Helden, Eileen G Hoal, Monika Esser, Michael Urban, Marlo Möller
BACKGROUND: Trichohepatoenteric syndrome (THE-S) or phenotypic diarrhoea of infancy is a rare autosomal recessive disorder characterised by severe infantile diarrhoea, facial dysmorphism, immunodeficiency and woolly hair. It was first described in 1982 in two infants with intractable diarrhoea, liver cirrhosis and abnormal hair structure on microscopy. We report on two siblings from a consanguineous family of Somali descent who, despite extensive clinical investigation, remained undiagnosed until their demise...
March 14, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28257626/two-novel-compound-heterozygous-bmp1-mutations-in-a-patient-with-osteogenesis-imperfecta-a-case-report
#19
Apiruk Sangsin, Chulaluck Kuptanon, Chalurmpon Srichomthong, Monnat Pongpanich, Kanya Suphapeetiporn, Vorasuk Shotelersuk
BACKGROUND: Osteogenesis imperfecta (OI) is a collagen-related bone dysplasia leading to a susceptibility to fractures. OI can be caused by mutations in several genes including BMP1. It encodes two isoforms, bone morphogenetic protein 1 (BMP1) and mammalian tolloid (mTLD); both have proteolytic activity to remove the C-propeptide from procollagen. CASE PRESENTATION: We report a Thai OI patient who had his first fracture at the age of three months. Using next generation sequencing, we successfully identified two novel compound heterozygous BMP1 mutations...
March 4, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28253841/identification-of-established-arrhythmogenic-right-ventricular-cardiomyopathy-mutation-in-a-patient-with-the-contrasting-phenotype-of-hypertrophic-cardiomyopathy
#20
Matthew Neil Bainbridge, Lili Li, Yanli Tan, Benjamin Y Cheong, Ali J Marian
BACKGROUND: Advances in the nucleic acid sequencing technologies have ushered in the era of genetic-based "precision medicine". Applications of the genetic discoveries to practice of medicine, however, are hindered by phenotypic variability of the genetic variants. The report illustrates extreme pleiotropic phenotypes associated with an established causal mutation for hereditary cardiomyopathy. CASE PRESENTATION: We report a 61-year old white female who presented with syncope and echocardiographic and cardiac magnetic resonance (CMR) imaging findings consistent with the diagnosis of hypertrophic cardiomyopathy (HCM)...
March 3, 2017: BMC Medical Genetics
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