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Start Over Author "Alyaarubi, Saif" Topic iodide peroxidase
3 results on '"Alyaarubi, Saif"'

1. Comprehensive Screening of Eight Known Causative Genes in Congenital Hypothyroidism With Gland-in-Situ.

Author

Nicholas AK, Serra EG, Cangul H, Alyaarubi S, Ullah I, Schoenmakers E, Deeb A, Habeb AM, Almaghamsi M, Peters C, Nathwani N, Aycan Z, Saglam H, Bober E, Dattani M, Shenoy S, Murray PG, Babiker A, Willemsen R, Thankamony A, Lyons G, Irwin R, Padidela R, Tharian K, Davies JH, Puthi V, Park SM, Massoud AF, Gregory JW, Albanese A, Pease-Gevers E, Martin H, Brugger K, Maher ER, Chatterjee VK, Anderson CA, and Schoenmakers N

Subjects
Humans, Mutation, Pedigree, Phenotype, Autoantigens genetics, Congenital Hypothyroidism genetics, Iodide Peroxidase genetics, Iron-Binding Proteins genetics, Receptors, Thyrotropin genetics, Thyroglobulin genetics
Abstract

Context: Lower TSH screening cutoffs have doubled the ascertainment of congenital hypothyroidism (CH), particularly cases with a eutopically located gland-in-situ (GIS). Although mutations in known dyshormonogenesis genes or TSHR underlie some cases of CH with GIS, systematic screening of these eight genes has not previously been undertaken., Objective: Our objective was to evaluate the contribution and molecular spectrum of mutations in eight known causative genes (TG, TPO, DUOX2, DUOXA2, SLC5A5, SLC26A4, IYD, and TSHR) in CH cases with GIS. Patients, Design, and Setting: We screened 49 CH cases with GIS from 34 ethnically diverse families, using next-generation sequencing. Pathogenicity of novel mutations was assessed in silico., Patients, Design, and Setting: We screened 49 CH cases with GIS from 34 ethnically diverse families, using next-generation sequencing. Pathogenicity of novel mutations was assessed in silico., Results: Twenty-nine cases harbored likely disease-causing mutations. Monogenic defects (19 cases) most commonly involved TG (12), TPO (four), DUOX2 (two), and TSHR (one). Ten cases harbored triallelic (digenic) mutations: TG and TPO (one); SLC26A4 and TPO (three), and DUOX2 and TG (six cases). Novel variants overall included 15 TG, six TPO, and three DUOX2 mutations. Genetic basis was not ascertained in 20 patients, including 14 familial cases., Conclusions: The etiology of CH with GIS remains elusive, with only 59% attributable to mutations in TSHR or known dyshormonogenesis-associated genes in a cohort enriched for familial cases. Biallelic TG or TPO mutations most commonly underlie severe CH. Triallelic defects are frequent, mandating future segregation studies in larger kindreds to assess their contribution to variable phenotype. A high proportion (∼41%) of unsolved or ambiguous cases suggests novel genetic etiologies that remain to be elucidated.

Published
2016
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2. Comprehensive screening of eight known causative genes in congenital hypothyroidism with gland-in-situ

Author

Nicholas, Adeline K., Serra, Eva G., Cangül, Hakan, Alyaarubi, Saif, Ullah, Irfan, Schoenmakers, Erik, Deeb, Asma, Habeb, Abdelhadi M., Almaghamsi, Mohammad, Peters, Catherine, Nathwani, Nisha, Aycan, Zehra, Bober, Ece, Dattani, Mehul, Shenoy, Savitha, Murray, Philip G., Babiker, Amir, Willemsen, Ruben, Thankamony, Ajay, Lyons, Greta, Irwin, Rachael, Padidela, Raja, Tharian, Kavitha, Davies, Justin H., Puthi, Vijith, Park, Soo-Mi, Massoud, Ahmed F., Gregory, John W., Albanese, Assunta, Pease-Gevers, Evelien, Martin, Howard, Brugger, Kim, Maher, Eamonn R., Chatterjee, V. Krishna K., Anderson, Carl A., Schoenmakers, Nadia, Uludağ Üniversitesi/Tıp Fakültesi/Çocuk Sağlığı ve Hastalıkları Anabilim Dalı., Sağlam, Halil, and C-7392-2019

Subjects
TPO protein, TG gene, Iodide peroxidase, Dual Oxidases, Congenital Hypothyroidism, Oxidoreductases, IYD gene, Autoantigens, Gene, Receptor gene, Thyroglobulin gene, Computer model, Phenomics, DUOX2 gene, Endocrinology & metabolism, Priority journal, Allele, Iodide organification defects, Goiter, Sequence analysis, TSHR gene, Pedigree, Phenotype, Iron-binding proteins, Cohort analysis, Human, TPO gene, Clinical article, Population, DNA sequence, Thyrotropin receptor, Guidelines, Thyroglobulin, Article, Autoantigen, Next generation sequencing, Genetic screening, Genetics, Humans, Pathogenicity, Genetic variation, Iron binding protein, Gene mutation, Receptors, thyrotropin, SLC5A5 gene, Congenital hypothyroidism, Japanese patients, DUOX2 mutations, Mutation, Genetic association, SLC26A4 gene, DUOXA2 gene, Dyshormonogenesis
Abstract

Context: Lower TSH screening cutoffs have doubled the ascertainment of congenital hypothyroidism (CH), particularly cases with a eutopically located gland-in-situ (GIS). Although mutations in known dyshormonogenesis genes or TSHR underlie some cases of CH with GIS, systematic screening of these eight genes has not previously been undertaken. Objective: Our objective was to evaluate the contribution and molecular spectrum of mutations in eight known causative genes (TG, TPO, DUOX2, DUOXA2, SLC5A5, SLC26A4, IYD, and TSHR) in CH cases with GIS. Patients, Design, and Setting:We screened 49 CH cases with GIS from 34 ethnically diverse families, using next-generation sequencing. Pathogenicity of novel mutations was assessed in silica. Results: Twenty-nine cases harbored likely disease-causing mutations. Monogenic defects (19 cases) most commonly involved TG (12), TPO (four), DUOX2 (two), and TSHR (one). Ten cases harbored triallelic (digenic) mutations: TG and TPO (one); SLC26A4 and TPO (three), and DUOX2 and TG (six cases). Novel variants overall included 15 TG, six TPO, and three DUOX2 mutations. Genetic basis was not ascertained in 20 patients, including 14 familial cases. Conclusions: The etiology of CH with GIS remains elusive, with only 59% attributable to mutations in TSHR or known dyshormonogenesis-associated genes in a cohort enriched for familial cases. Biallelic TG or TPO mutations most commonly underlie severe CH. Triallelic defects are frequent, mandating future segregation studies in larger kindreds to assess their contribution to variable phenotype. A high proportion (-41%) of unsolved or ambiguous cases suggests novel genetic etiologies that remain to be elucidated. Wellcome Trust European Commission - 100585/Z/12/Z - 095564/Z/11/Z - 098051 - WT091310 UK Research & Innovation (UKRI) Medical Research Council UK (MRC) - MC_UU_12012/5/B European Commission National Institute for Health Research (NIHR) - (NF-SI-0514-10176) NIHR (CL-2012-06-005)

Published
2016

3. Comprehensive Screening of Eight Known Causative Genes in Congenital Hypothyroidism With Gland-in-Situ

Author

Nicholas, Adeline K, Serra, Eva G, Cangul, Hakan, Alyaarubi, Saif, Ullah, Irfan, Schoenmakers, Erik, Deeb, Asma, Habeb, Abdelhadi M, Almaghamsi, Mohammad, Peters, Catherine, Nathwani, Nisha, Aycan, Zehra, Saglam, Halil, Bober, Ece, Dattani, Mehul, Shenoy, Savitha, Murray, Philip G, Babiker, Amir, Willemsen, Ruben, Thankamony, Ajay, Lyons, Greta, Irwin, Rachael, Padidela, Raja, Tharian, Kavitha, Davies, Justin H, Puthi, Vijith, Park, Soo-Mi, Massoud, Ahmed F, Gregory, John W, Albanese, Assunta, Pease-Gevers, Evelien, Martin, Howard, Brugger, Kim, Maher, Eamonn R, Chatterjee, V Krishna K, Anderson, Carl A, and Schoenmakers, Nadia

Subjects
Phenotype, Iron-Binding Proteins, Mutation, Congenital Hypothyroidism, Humans, Receptors, Thyrotropin, Autoantigens, Iodide Peroxidase, Thyroglobulin, 3. Good health, Pedigree
Abstract

CONTEXT: Lower TSH screening cutoffs have doubled the ascertainment of congenital hypothyroidism (CH), particularly cases with a eutopically located gland-in-situ (GIS). Although mutations in known dyshormonogenesis genes or TSHR underlie some cases of CH with GIS, systematic screening of these eight genes has not previously been undertaken. OBJECTIVE: Our objective was to evaluate the contribution and molecular spectrum of mutations in eight known causative genes (TG, TPO, DUOX2, DUOXA2, SLC5A5, SLC26A4, IYD, and TSHR) in CH cases with GIS. Patients, Design, and Setting: We screened 49 CH cases with GIS from 34 ethnically diverse families, using next-generation sequencing. Pathogenicity of novel mutations was assessed in silico. PATIENTS, DESIGN, AND SETTING: We screened 49 CH cases with GIS from 34 ethnically diverse families, using next-generation sequencing. Pathogenicity of novel mutations was assessed in silico. RESULTS: Twenty-nine cases harbored likely disease-causing mutations. Monogenic defects (19 cases) most commonly involved TG (12), TPO (four), DUOX2 (two), and TSHR (one). Ten cases harbored triallelic (digenic) mutations: TG and TPO (one); SLC26A4 and TPO (three), and DUOX2 and TG (six cases). Novel variants overall included 15 TG, six TPO, and three DUOX2 mutations. Genetic basis was not ascertained in 20 patients, including 14 familial cases. CONCLUSIONS: The etiology of CH with GIS remains elusive, with only 59% attributable to mutations in TSHR or known dyshormonogenesis-associated genes in a cohort enriched for familial cases. Biallelic TG or TPO mutations most commonly underlie severe CH. Triallelic defects are frequent, mandating future segregation studies in larger kindreds to assess their contribution to variable phenotype. A high proportion (∼41%) of unsolved or ambiguous cases suggests novel genetic etiologies that remain to be elucidated.

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