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BMC Medical Genetics

Chao Ling, Ruifang Sui, Fengxia Yao, Zhihong Wu, Xue Zhang, Shuyang Zhang
BACKGROUND: Nance-Horan syndrome (NHS) is an X-linked inheritance disorder characterized by bilateral congenital cataracts, and facial and dental dysmorphism. This disorder is caused by mutations in the NHS gene. However, NHS may be difficult to detect in individuals with subtle facial dysmorphism and dental abnormalities in whom congenital cataracts are the primary clinical manifestations. METHODS: In this study, we present a three-generation family with NHS. Whole exome sequencing was performed to determine the potential pathogenic variant in the proband...
January 14, 2019: BMC Medical Genetics
Fateme Ziyaee, Eslam Shorafa, Hassan Dastsooz, Parham Habibzadeh, Hamid Nemati, Amir Saeed, Mohammad Silawi, Mohammad Ali Farazi Fard, Mohammad Ali Faghihi, Seyed Alireza Dastgheib
BACKGROUND: Muscular dystrophies are a clinically and genetically heterogeneous group of disorders characterized by variable degrees of progressive muscle degeneration and weakness. There is a wide variability in the age of onset, symptoms and rate of progression in subtypes of these disorders. Herein, we present the results of our study conducted to identify the pathogenic genetic variation involved in our patient affected by rigid spine muscular dystrophy. CASE PRESENTATION: A 14-year-old boy, product of a first-cousin marriage, was enrolled in our study with failure to thrive, fatigue, muscular dystrophy, generalized muscular atrophy, kyphoscoliosis, and flexion contracture of the knees and elbows...
January 14, 2019: BMC Medical Genetics
Ceren Saygı, Yasemin Alanay, Uğur Sezerman, Aslı Yenenler, Nesrin Özören
BACKGROUND: Autosomal recessive nail dysplasia is characterized by thick and hard nails with a very slow growth on the hands and feet. Mutations in FZD6 gene were found to be associated with autosomal recessive nail dysplasia in 2011. Presently, only seven mutations have been reported in FZD6 gene; five mutations are clustered in the C-terminus, one is at the seventh transmembrane domain, and another is at the very beginning of third extracellular loop. METHODS: Whole exome sequencing (WES) was applied to the index case, her one affected sister and her healthy consanguineous parents...
January 14, 2019: BMC Medical Genetics
Rita Maria Alves, Paolo Uva, Marielza F Veiga, Manuela Oppo, Fabiana C R Zschaber, Giampiero Porcu, Henrique P Porto, Ivana Persico, Stefano Onano, Gianmauro Cuccuru, Rossano Atzeni, Lauro C N Vieira, Marcos V A Pires, Francesco Cucca, Maria Betânia P Toralles, Andrea Angius, Laura Crisponi
BACKGROUND: KBG syndrome is a very rare autosomal dominant disorder, characterized by macrodontia, distinctive craniofacial findings, skeletal findings, post-natal short stature, and developmental delays, sometimes associated with seizures and EEG abnormalities. So far, there have been over 100 cases of KBG syndrome reported. CASE PRESENTATION: Here, we describe two sisters of a non-consanguineous family, both presenting generalized epilepsy with febrile seizures (GEFS+), and one with a more complex phenotype associated with mild intellectual disability, skeletal and dental anomalies...
January 14, 2019: BMC Medical Genetics
Mohammad M Al-Qattan, Abdulaziz Jarman, Atif Rafique, Zuhair N Al-Hassnan, Heba M Al-Qattan
BACKGROUND: Rubinstein-Taybi syndrome (RSTS) Type 1 (OMIM 180849) is characterized by three main features: intellectual disability; broad and frequently angulated thumbs and halluces; and characteristic facial dysmorphism. CASE PRESENTATION: We report on a Saudi boy with RSTS Type 1 and the following distinct features: a midline notch of the upper lip, a bifid tip of the tongue, a midline groove of the lower lip, plump fingers with broad / flat fingertips, and brachydactyly...
January 11, 2019: BMC Medical Genetics
Junling Fu, Yiting Zhao, Tong Wang, Qian Zhang, Xinhua Xiao
BACKGROUND: Acanthosis nigricans (AN) is a clinical manifestation featured by velvety brown plaques in skin folds that occurs in some hereditary and syndromic disorders. Fibroblast growth factor receptor 3 (FGFR3) mutations have been identified as one of the genetic causes of inherited AN. CASE PRESENTATION: A 17-year-old Chinese female had presented generalized acanthosis nigricans since she was 4 years old. She yielded no family history of short stature or AN...
January 11, 2019: BMC Medical Genetics
Cheng Wang, Marie-Hélène Roy-Gagnon, Jean-François Lefebvre, Kelly M Burkett, Lise Dubois
BACKGROUND: The interactive effect of the IGF pathway genes with the environment may contribute to childhood obesity. Such gene-environment interactions can take on complex forms. Detecting those relationships using longitudinal family studies requires simultaneously accounting for correlations within individuals and families. METHODS: We studied three methods for detecting interaction effects in longitudinal family studies. The twin model and the nonparametric partition-based score test utilized individual outcome averages, whereas the linear mixed model used all available longitudinal data points...
January 11, 2019: BMC Medical Genetics
Hongyang Wang, Li Wang, Ju Yang, Linwei Yin, Lan Lan, Jin Li, Qiujing Zhang, Dayong Wang, Jing Guan, Qiuju Wang
BACKGROUND: Mohr-Tranebjaerg syndrome (MTS) is a rare X-linked recessive neurodegenerative disorder resulting in early-onset hearing impairment, gradual dystonia and optic atrophy. MTS is caused by variations in the nuclear TIMM8A gene, which is involved in mitochondrial transport of metabolites. This study aimed to identify the pathogenic gene variations in three Chinese families associated with predicted MTS with or without X-linked agammaglobulinaemia. METHODS: Otologic examinations, vestibular, neurological, optical and other clinical evaluations were conducted on the family members...
January 11, 2019: BMC Medical Genetics
Tanel Traks, Maris Keermann, Ele Prans, Maire Karelson, Ulvi Loite, Gea Kõks, Helgi Silm, Sulev Kõks, Külli Kingo
BACKGROUND: Plaque psoriasis is a non-contagious skin disease in which characteristic red and flaky lesions result from a dysregulation involving both innate and adaptive immune mechanisms. Several cytokines have been implicated in these processes and lately interleukin (IL)-36 family members have become more recognised among them. Thus far, genetic studies have only investigated IL36RN gene of this family in relation to pustular psoriasis. Since IL36G has previously demonstrated markedly increased levels in plaque psoriasis patients and is linked to IL-23/IL-17 axis critical in psoriasis pathology, it was chosen to be the focus of current report...
January 11, 2019: BMC Medical Genetics
Wen Cao, Liu-Lin Luo, Wei-Wei Chen, Li Liang, Ran-Ran Zhang, Yan-Lin Zhao, Jin Chen, Jun Yue
BACKGROUND: Host genetic factors affect the immune response to Mycobacterium tuberculosis (Mtb) infection as well as the progression of the disease. Epiregulin (EREG) belongs to the epidermal growth factor (EGF) family, which binds to the epidermal growth factor receptor (EGFR) to regulate the immune response of the host during infections. Our study aimed to compare EREG levels in tuberculosis (TB) patients and healthy controls and assess whether polymorphisms in EREG increase the risk of TB...
January 11, 2019: BMC Medical Genetics
Ana Perdomo-Ramirez, Marian de Armas-Ortiz, Elena Ramos-Trujillo, Lorena Suarez-Artiles, Felix Claverie-Martin
BACKGROUND: Familial hypomagnesaemia with hypercalciuria and nephrocalcinosis type 1 is an autosomal recessive disease characterized by excessive renal magnesium and calcium excretion, bilateral nephrocalcinosis, and progressive chronic renal failure. This rare disease is caused by mutations in CLDN16 that encodes claudin-16, a tight-junction protein involved in paracellular reabsorption of magnesium and calcium in the renal tubule. Most of these variants are located in exons and have been classified as missense mutations...
January 8, 2019: BMC Medical Genetics
Junjue Chen, Yan Wei, Linlu Tian, Xiaoli Kang
BACKGROUND: Infantile nystagmus (IN) is an oculomotor disorder that is characterized by conjugate involuntary, rapid and repetitive movement of the eyes. To date, the pathogenesis of IN remains unclear. Many patients show an X-linked inheritance pattern. In this study, we explored the mutation in the FERM domain-containing 7 (FRMD7) gene in a Chinese family with X-linked infantile nystagmus. METHODS: We conducted comprehensive ocular examinations and collected 5 ml of blood samples from members of a family with X-linked IN and 100 normal controls...
January 7, 2019: BMC Medical Genetics
Michele Salemi, Rossella Cannarella, Rosita A Condorelli, Laura Cimino, Federico Ridolfo, Giorgio Giurato, Corrado Romano, Sandro La Vignera, Aldo E Calogero
BACKGROUND: Klinefelter syndrome (KS) is characterized by the presence of at least one supernumerary X chromosome. KS typical symptoms include tall stature, gynecomastia, hypogonadism and azoospermia. KS patients show a higher risk of developing metabolic and cardiovascular diseases, inflammatory and autoimmune disorders, osteoporosis and cancer. Long non-coding RNA (lncRNA) growth arrest-specific 5 (GAS5) has been shown to be involved in several biologic processes, including inflammatory and autoimmune diseases, vascular endothelial cells apoptosis and atherosclerosis, as well as cellular growth and proliferation, cellular development and cell-to-cell signaling and interaction...
January 7, 2019: BMC Medical Genetics
Wenjie Wang, Jianping Yang, Jinjie Xue, Wenjuan Mu, Xiaogang Zhang, Wang Wu, Mengnan Xu, Yuyan Gong, Yiqian Liu, Yu Zhang, Xiaobing Xie, Weiyue Gu, Jigeng Bai, David S Cram
BACKGROUND: Tandem mass spectrometry (MS MS) and simple fluorometric assays are currently used in newborn screening programs to detect inborn errors of metabolism (IEM). The aim of the study was to evaluate the clinical utility of exome sequencing as a second tier screening method to assist clinical diagnosis of the newborn. METHODS: A novel PCR-exome amplification and re-sequencing (PEARS) assay was designed and used to detect mutations in 122 genes associated with 101 IEM...
January 6, 2019: BMC Medical Genetics
Nadir A Ahmed, Ishag Adam, Salah Eldin G Elzaki, Hiba A Awooda, Hamdan Z Hamdan
BACKGROUND: Preeclampsia can lead to adverse maternal and perinatal outcomes. There are few studies on the association of preeclampsia with thrombophilia in Africa including Sudan. METHODS: A case -controls study was conducted at Saad Abualila Hospital in Khartoum, Sudan during the period of February through November 2017. The cases were women with preeclampsia and healthy pregnant women were the controls (180 women in each arm of the study). Genotyping for Factor-V Leiden 1691G/A and Prothrombin gene variation 20210G/A was done by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP)...
January 5, 2019: BMC Medical Genetics
Natalia Krawczynska, Jolanta Wierzba, Jacek Jasiecki, Bartosz Wasag
BACKGROUND: Cornelia de Lange syndrome (CdLS), a rare, multisystemic disorder, has been linked to genetic alterations in NIPBL, SMC1A, SMC3, HDAC8, and RAD21 genes. Approximately 60% of CdLS patients harbor various NIPBL variants. Genetic changes predicted to affect NIPBL gene splicing represent 15% of all NIPBL genetic abnormalities. Yet, only a few studies have investigated the molecular consequences of such variants. CASE PRESENTATION: This study reports two novel, intronic NIPBL genetic variants in unrelated CdLS patients with the characteristic phenotype...
January 3, 2019: BMC Medical Genetics
Yi-Kun Zhou, Xiao-Chun Yang, Yang Cao, Heng Su, Li Liu, Zhi Liang, Yun Zheng
BACKGROUND: Trichothiodystrophy nonphotosensitive 1 (TTDN1) is a disease with mental retardation, brittle hair. Some cases of the diseases are caused by mutations of the MPLKIP gene. METHODS: We carefully identified the clinic characteristics, the sulfur level and pattern of the hair shafts of a female patient of with the symptom of hypergonadotropic hypogonadism, and of her parents and brother whose are healthy. We also collected the blood sample of the patient and performed the exon sequencing...
December 31, 2018: BMC Medical Genetics
Zhifa Han, Rui Tian, Peng Ren, Wenyang Zhou, Pingping Wang, Meng Luo, Shuilin Jin, Qinghua Jiang
BACKGROUND: Alzheimer's disease (AD) and Parkinson's disease (PD) are the top two common neurodegenerative diseases in elderly. Recent studies found the α-synuclein have a key role in AD. Although many clinical and pathological features between AD and PD are shared, the genetic association between them remains unclear, especially whether α-synuclein in PD genetically alters AD risk. RESULTS: We did not obtain any significant result (OR = 0.918, 95% CI: 0.782-1...
December 31, 2018: BMC Medical Genetics
Jihyun Kim, June Hyuk Kim, Hyun Guy Kang, Seog Yun Park, Jung Yeon Yu, Eun Young Lee, Sung Eun Oh, Young Ho Kim, Tak Yun, Charny Park, Soo Young Cho, Hye Jin You
BACKGROUND: Several studies have investigated the molecular drivers and therapeutic targets in adult soft tissue sarcomas. However, such studies are limited by the genomic heterogeneity and rarity of sarcomas, particularly in those with complex and unbalanced karyotypes. Additional biomarkers are needed across sarcoma types to improve therapeutic strategies. To investigate the molecular characteristics of complex karyotype sarcomas (CKSs) for therapeutic targets, we performed genomic profiling...
December 31, 2018: BMC Medical Genetics
Chi Zhou, Jin Huang, Guanglin Cui, Hesong Zeng, Dao Wen Wang, Qiang Zhou
BACKGROUND: Fabry disease is an X-linked recessive lysosomal disorder caused by deficient enzymatic activity of α-galactosidase A (α-Gal A). The insufficient enzymatic activity leads to excessive accumulation of glycosphingolipids, the substrates of the enzyme, in lysosomes in organs and tissues. Mutations in the α-Gal A gene (GLA, Xq22) have been proven to be responsible for Fabry disease. METHODS: In this study, we report a four-generation pedigree with left ventricular hypertrophy and chronic renal failure that was diagnosed by sequencing the GLA gene...
December 27, 2018: BMC Medical Genetics
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