Article
Genetics & Heredity
Thashi Bharadwaj, Isabelle Schrauwen, Anushree Acharya, Liz M. Nouel-Saied, Marja-Leena Vaisanen, Minna Kraatari, Elisa Rahikkala, Irma Jarvela, Jouko Kotimaki, Suzanne M. Leal
Summary: The genetic cause of hearing impairment in two Finnish families was investigated in this study. A homozygous pathogenic splice site variant in the CAPB2 gene was identified as the underlying cause of the hearing impairment.
MOLECULAR GENETICS & GENOMIC MEDICINE
(2022)
Article
Biochemistry & Molecular Biology
Hee Ji Choi, Sumaira Kanwal, Rashid Hameed, Nasrin Tamanna, Shazia Perveen, Hina Mahreen, Wonseok Son, Kyung Suk Lee, Ki Wha Chung
Summary: This study performed genetic analysis on Pakistani DFNB families and identified biallelic mutations as the potential cause of early onset hearing loss in six families. This research will contribute to providing precise molecular diagnosis and treatment for patients with prelingual onset deafness.
Article
Biochemistry & Molecular Biology
Thashi Bharadwaj, Isabelle Schrauwen, Sakina Rehman, Khurram Liaqat, Anushree Acharya, Arnaud P. J. Giese, Liz M. Nouel-Saied, Abdul Nasir, Jenna L. Everard, Lana M. Pollock, Shaoyuan Zhu, Michael J. Bamshad, Deborah A. Nickerson, Raja Hussain Ali, Asmat Ullah, Abdul Wali, Ghazanfar Ali, Regie Lyn P. Santos-Cortez, Zubair M. Ahmed, Brian M. McDermott Jr, Muhammad Ansar, Saima Riazuddin, Wasim Ahmad, Suzanne M. Leal
Summary: Research on consanguineous Pakistani families identified rare homozygous missense variants in four genes associated with hearing impairment. Through linkage analysis, in silico protein analysis, and mouse inner ear tissue analysis, new candidate genes for hearing impairment were proposed, adding to our understanding of the etiology of HI.
EUROPEAN JOURNAL OF HUMAN GENETICS
(2022)
Article
Biochemistry & Molecular Biology
Muhammad Asif, Chien-Chun Chiou, Malik Fiaz Hussain, Manzoor Hussain, Zureesha Sajid, Muhammad Gulsher, Afifa Raheem, Adil Khan, Nasreen Nasreen, Andrzej Kloczkowski, Mubashir Hassan, Furhan Iqbal, Chien-Chin Chen
Summary: This study reported the genetic basis of CMT in consanguineous Pakistani families, identifying mutations in GAPD1 and MFN2 genes as the cause of the disease.
DNA AND CELL BIOLOGY
(2023)
Article
Medical Laboratory Technology
Mahdiyeh Moudi, Mohammad Yahya Vahidi Mehrjardi, Hossein Hozhabri, Zahra Metanat, Seyed Mehdi Kalantar, Mohsen Taheri, Nasrin Ghasemi, Mohammadreza Dehghani
Summary: A study reveals genetic mutations in patients with intellectual disability in Iranian consanguineous families. Filtering the data from whole-exome sequencing identified pathogenic mutations in the CEP290, FBXO31, and TIMM50 genes in the patients.
JOURNAL OF CLINICAL LABORATORY ANALYSIS
(2022)
Article
Cell Biology
Minjin Kang, Jung Ah Kim, Mee Hyun Song, Sun Young Joo, Se Jin Kim, Seung Hyun Jang, Ho Lee, Je Kyung Seong, Jae Young Choi, Heon Yung Gee, Jinsei Jung
Summary: In this study, a novel nonsense homozygous variant in CEP250 was identified among family members with progressive moderate sensorineural hearing loss. This variant resulted in centrosome localization deficit and hair cell degeneration in the cochlea, leading to the progression of hearing loss in humans and mice.
Article
Biochemistry & Molecular Biology
Siqi Wu, Zhoufei Hei, Li Zheng, Jintong Zhou, Zaizhou Liu, Jing Wang, Pengfei Fang
Summary: Aminoacyl-tRNA synthetases are crucial for protein biosynthesis, and a recent study identified a missense mutation in the KARS gene that led to hearing loss. The mutation triggered subtle changes in the tRNA anticodon binding region, particularly in mitochondrial tRNAs.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2021)
Article
Genetics & Heredity
Kevin T. Booth, Yoel Hirsch, Anna C. Vardaro, Josef Ekstein, Devorah Yefet, Adina Quint, Tzvi Weiden, David P. Corey
Summary: This study investigated the genetic causes of hearing loss in four Ashkenazi Jewish families, identifying new variants in the MYO15A gene. The research revealed the impact of different variants on the phenotype of hearing loss, further elucidating the role of genetic backgrounds in hearing loss.
FRONTIERS IN GENETICS
(2021)
Article
Ophthalmology
Zohra Chibani, Imen Zone Abid, Peter Soderkvist, Jamel Feki, Mounira Hmani Aifa
Summary: This study identified a novel SLC4A11 gene mutation associated with CHED and confirmed its pathogenicity. The mutation may lead to disruptions in osmolarity balance and structural rearrangements in the protein, providing more insights into genotype-phenotype correlations.
BRITISH JOURNAL OF OPHTHALMOLOGY
(2022)
Article
Clinical Neurology
Reham Khalaf-Nazzal, Imad Dweikat, Mosab Maree, Maysa Alawneh, Myassar Barahmeh, Rasha T. Doulani, Mohammad Qrareya, Mohammad Qadi, Anwar Dudin
Summary: In this study, the clinical and molecular architecture of six individuals from four unrelated consanguineous Palestinian families with consistent MLC features were analyzed. The entire coding and flanking intronic regions of the MLC1 gene were sequenced.
BRAIN & DEVELOPMENT
(2022)
Article
Medical Laboratory Technology
Ehsan Abbaspour Rodbaneh, Mohammad Panahi, Bahareh Rahimi, Haleh Mokabber, Reza Farajollahi, Behzad Davarnia
Summary: This study in the Iranian Azeri population identified the c.35delG; p. Gly12Val mutation in the GJB2 gene as the most common cause of ARNSHL, with a frequency of 26%. A novel mutation was also detected, highlighting the importance of ARNSHL screening programs based on local population data.
JOURNAL OF CLINICAL LABORATORY ANALYSIS
(2021)
Article
Biochemistry & Molecular Biology
Obaid Ur Rahman, Jeena Kim, Caroline Mahon, Musharraf Jelani, Changsoo Kang
Summary: Through family studies, two novel mutations causing ACD were identified in two Pakistani families, which appear to impact the stability of GPNMB as demonstrated by protein modeling.
Article
Genetics & Heredity
Kyung Seok Oh, Daniel Walls, Sun Young Joo, Jung Ah Kim, Jee Eun Yoo, Young Ik Koh, Da Hye Kim, John Hoon Rim, Hye Ji Choi, Hye-Youn Kim, Seyoung Yu, Richard J. Smith, Jae Young Choi, Heon Yung Gee, Jinsei Jung
Summary: This study found that individuals with non-LCCL domain variants of COCH in East Asian and European-descent families had more severe hearing loss at an earlier age compared to those with variants in the LCCL domain. Functional studies also showed that COCH variants had distinct pathogenic mechanisms in a domain-dependent manner.
Article
Multidisciplinary Sciences
Mohib Ullah Kakar, Muhammad Akram, Muhammad Zubair Mehboob, Muhammad Younus, Muhammad Bilal, Ahmed Waqas, Amina Nazir, Muhammad Shafi, Muhammad Umair, Sajjad Ahmad, Misbahuddin M. Rafeeq
Summary: This study characterized the clinical and genetic features of two individuals with autosomal recessive nonsyndromic hearing impairment (AR-NSHI) in a consanguineous family. Whole-exome sequencing revealed a homozygous missense variant in the SIX5 gene. This report supports the importance of the SIX5 gene in auditory function.
Article
Genetics & Heredity
Samuel Mawuli Adadey, Edmond Wonkam-Tingang, Leonardo Alves de Souza Rios, Elvis Twumasi Aboagye, Kevin Esoh, Noluthando Manyisa, Carmen De Kock, Gordon A. Awandare, Shaheen Mowla, Ambroise Wonkam
Summary: In this study, the pathogenicity of CLIC5A and SLC12A2 variants in two African families with non-syndromic hearing impairment (NSHI) was investigated. The results showed that both variants were overexpressed and caused abnormal cellular morphology. Moreover, CLIC5A was found to interact with at least eight proteins. This study expands our understanding of the role of these variants in hearing impairment.
FRONTIERS IN GENETICS
(2022)
Article
Biochemistry & Molecular Biology
Thashi Bharadwaj, Isabelle Schrauwen, Sakina Rehman, Khurram Liaqat, Anushree Acharya, Arnaud P. J. Giese, Liz M. Nouel-Saied, Abdul Nasir, Jenna L. Everard, Lana M. Pollock, Shaoyuan Zhu, Michael J. Bamshad, Deborah A. Nickerson, Raja Hussain Ali, Asmat Ullah, Abdul Wali, Ghazanfar Ali, Regie Lyn P. Santos-Cortez, Zubair M. Ahmed, Brian M. McDermott Jr, Muhammad Ansar, Saima Riazuddin, Wasim Ahmad, Suzanne M. Leal
Summary: Research on consanguineous Pakistani families identified rare homozygous missense variants in four genes associated with hearing impairment. Through linkage analysis, in silico protein analysis, and mouse inner ear tissue analysis, new candidate genes for hearing impairment were proposed, adding to our understanding of the etiology of HI.
EUROPEAN JOURNAL OF HUMAN GENETICS
(2022)
Article
Genetics & Heredity
Allan Thomas Hojland, Lisse J. M. Tavernier, Isabelle Schrauwen, Manou Sommen, Vedat Topsakal, Isabelle Schatteman, Ingeborg Dhooge, Alex Huber, Diego Zanetti, Henricus P. M. Kunst, Alexander Hoischen, Michael B. Petersen, Guy Van Camp, Erik Fransen
Summary: This study identified significant associations between ACAN gene variants and otosclerosis risk, with multiple independent signals. The variants include both predisposing and protective alleles, spanning different populations. Exonic variants in the ACAN gene are mainly located in the CS domain, with a wide range of effect sizes and population frequencies.
Correction
Genetics & Heredity
Khurram Liaqat, Shabir Hussain, Muhammad Bilal, Abdul Nasir, Anushree Acharya, Raja Hussain Ali, Shoaib Nawaz, Muhammad Umair, Isabelle Schrauwen, Wasim Ahmad, Suzanne M. Leal
JOURNAL OF HUMAN GENETICS
(2022)
Article
Genetics & Heredity
Anushree Acharya, Haluk Kavus, Patrick Dunn, Abdul Nasir, Leandra Folk, Kara Withrow, Ingrid M. Wentzensen, Maura R. Z. Ruzhnikov, Camille Fallot, Thomas Smol, Melanie Rama, Kathleen Brown, Sandra Whalen, Alban Ziegler, Magali Barth, Anna Chassevent, Constance Smith-Hicks, Alexandra Afenjar, Thomas Courtin, Solveig Heide, Esperanza Font-Montgomery, Caleb Heid, J. Austin Hamm, Donald R. Love, Farouq Thabet, Vinod K. Misra, Mitch Cunningham, Suzanne M. Leal, Irma Jarvela, Elizabeth A. Normand, Fanggeng Zou, Mayada Helal, Boris Keren, Erin Torti, Wendy K. Chung, Isabelle Schrauwen
Summary: In this study, 13 novel missense variants in HECW2 were identified in previously unpublished cases, with 18 confirmed as de novo variants. Patients with HECW2-related neurodevelopmental disorders often exhibit hypotonia, developmental delay/intellectual disability, and developmental language disorder. Genotype-phenotype analysis indicates that variants in the HECT domain are more frequently associated with cortical visual impairment and gastrointestinal issues.
JOURNAL OF MEDICAL GENETICS
(2022)
Article
Biochemistry & Molecular Biology
Adebolajo Adeyemo, Rabia Faridi, Parna Chattaraj, Rizwan Yousaf, Risa Tona, Samuel Okorie, Thashi Bharadwaj, Liz M. Nouel-Saied, Anushree Acharya, Isabelle Schrauwen, Robert J. Morell, Suzanne M. Leal, Thomas B. Friedman, Andrew J. Griffith, Isabelle Roux
Summary: Although variant alleles of hundreds of genes are associated with sensorineural deafness in children, the genes and alleles involved remain largely unknown in the Sub-Saharan regions of Africa. In a study of families in or near Ibadan, Nigeria, a high level of genetic heterogeneity of hearing loss was discovered, with likely causal variants identified in genes reported to underlie deafness in other populations. The results suggest challenges for molecular genetic screening, counseling, and early intervention in this population.
EUROPEAN JOURNAL OF HUMAN GENETICS
(2022)
Article
Genetics & Heredity
Thashi Bharadwaj, Isabelle Schrauwen, Anushree Acharya, Liz M. Nouel-Saied, Marja-Leena Vaisanen, Minna Kraatari, Elisa Rahikkala, Irma Jarvela, Jouko Kotimaki, Suzanne M. Leal
Summary: The genetic cause of hearing impairment in two Finnish families was investigated in this study. A homozygous pathogenic splice site variant in the CAPB2 gene was identified as the underlying cause of the hearing impairment.
MOLECULAR GENETICS & GENOMIC MEDICINE
(2022)
Article
Genetics & Heredity
Khurram Liaqat, Shabir Hussain, Anushree Acharya, Abdul Nasir, Thashi Bharadwaj, Muhammad Ansar, Sulman Basit, Isabelle Schrauwen, Wasim Ahmad, Suzanne M. Leal
Summary: This study reports a new likely pathogenic variant in the PSAP gene that causes atypical Gaucher disease in a Pakistani family with prelingual profound sensorineural hearing impairment, vestibular dysfunction, hepatosplenomegaly, kyphosis, and thrombocytopenia.
Article
Genetics & Heredity
Diana M. Cornejo-Sanchez, Anushree Acharya, Thashi Bharadwaj, Lizeth Marin-Gomez, Pilar Pereira-Gomez, Liz M. Nouel-Saied, Deborah A. Nickerson, Michael J. Bamshad, Heather C. Mefford, Isabelle Schrauwen, Jaime Carrizosa-Moog, William Cornejo-Ochoa, Nicolas Pineda-Trujillo, Suzanne M. Leal
Summary: This study evaluated two Colombian families with GEFS+, and identified new and known SCN1A gene variants, expanding the understanding of the genetic and phenotypic spectrum of the disease.
Article
Genetics & Heredity
Abdoulaye Yalcouye, Oumou Traore, Salimata Diarra, Isabelle Schrauwen, Kevin Esoh, Magda Kamila Kadlubowska, Thashi Bharadwaj, Samuel Mawuli Adadey, Mohamed Keita, Cheick O. Guinto, Suzanne M. Leal, Guida Landoure, Ambroise Wonkam
Summary: In this study, a rare case of branchio-otic syndrome (BO), a genetic hearing impairment disorder, in a Malian family was reported. Genetic testing confirmed a variant in the EYA1 gene to be the cause of BO syndrome in this family. The study also expanded the genetic spectrum of the condition in the African population.
MOLECULAR GENETICS & GENOMIC MEDICINE
(2022)
Article
Medicine, General & Internal
Lisse J. M. Tavernier, Thomas Vanpoucke, Isabelle Schrauwen, Guy Van Camp, Erik Fransen
Summary: Otosclerosis is a common cause of hearing loss in young adults, with a prevalence of 0.3-0.4% in the European population. A recent genome-wide association study identified 15 new risk loci and confirmed the regions of three previously reported candidate genes. This study resequenced seven candidate genes and found that five of them were associated with the disease.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Cell Biology
Eric Frankel, Avijit Podder, Megan Sharifi, Roshan Pillai, Newell Belnap, Keri Ramsey, Julius Dodson, Pooja Venugopal, Molly Brzezinski, Lorida Llaci, Brittany Gerald, Gabrielle Mills, Meredith Sanchez-Castillo, Chris D. Balak, Szabolcs Szelinger, Wayne M. Jepsen, Ashley L. Siniard, Ryan Richholt, Marcus Naymik, Isabelle Schrauwen, David W. Craig, Ignazio S. Piras, Matthew J. Huentelman, Nicholas J. Schork, Vinodh Narayanan, Sampathkumar Rangasamy
Summary: Through studying RTT-L patients, we discovered that their gene mutations are unrelated to RTT but cause a similar clinical phenotype. We analyzed the protein-protein interaction network of these genes and found that HDAC1 and CHD4 play important regulatory roles between RTT and RTT-L genes.
Article
Genetics & Heredity
Tommi Salokivi, Riitta Parkkola, Yasmin Rajendran, Thashi Bharadwaj, Anushree Acharya, Suzanne M. Leal, Irma Jarvela, Maria Arvio, Isabelle Schrauwen
Summary: In this case report, a girl with multiple disabilities and BPP caused by a variant in the CYFIP2 gene is presented, expanding the genetic diversity associated with BPP.
AMERICAN JOURNAL OF MEDICAL GENETICS PART A
(2023)