Nejat Mahdieh, Morteza Heidari, Zahra Rezaei, Ali Reza Tavasoli, Sareh Hosseinpour, Maryam Rasulinejad, Ali Zare Dehnavi, Masoud Ghahvechi Akbari, Reza Shervin Badv, Elahe Vafaei, Ali Mohebbi, Pouria Mohammadi, Seyyed Mohammad Mahdi Hosseiny, Reza Azizimalamiri, Ali Nikkhah, Elham Pourbakhtyaran, Mohammad Rohani, Narges Khanbanha, Sedigheh Nikbakht, Mojtaba Movahedinia, Parviz Karimi, Homa Ghabeli, Seyed Ahmad Hosseini, Fatemeh Sadat Rashidi, Masoud Garshasbi, Morteza Rezvani Kashani, Noor M. Ghiasvand, Stephan Zuchner, Matthis Synofzik, Mahmoud Reza Ashrafi
{"title":"The genetic basis of early-onset hereditary ataxia in Iran: results of a national registry of a heterogeneous population","authors":"Nejat Mahdieh, Morteza Heidari, Zahra Rezaei, Ali Reza Tavasoli, Sareh Hosseinpour, Maryam Rasulinejad, Ali Zare Dehnavi, Masoud Ghahvechi Akbari, Reza Shervin Badv, Elahe Vafaei, Ali Mohebbi, Pouria Mohammadi, Seyyed Mohammad Mahdi Hosseiny, Reza Azizimalamiri, Ali Nikkhah, Elham Pourbakhtyaran, Mohammad Rohani, Narges Khanbanha, Sedigheh Nikbakht, Mojtaba Movahedinia, Parviz Karimi, Homa Ghabeli, Seyed Ahmad Hosseini, Fatemeh Sadat Rashidi, Masoud Garshasbi, Morteza Rezvani Kashani, Noor M. Ghiasvand, Stephan Zuchner, Matthis Synofzik, Mahmoud Reza Ashrafi","doi":"10.1186/s40246-024-00598-5","DOIUrl":null,"url":null,"abstract":"To investigate the genetics of early-onset progressive cerebellar ataxia in Iran, we conducted a study at the Children’s Medical Center (CMC), the primary referral center for pediatric disorders in the country, over a three-year period from 2019 to 2022. In this report, we provide the initial findings from the national registry. We selected all early-onset patients with an autosomal recessive mode of inheritance to assess their phenotype, paraclinical tests, and genotypes. The clinical data encompassed clinical features, the Scale for the Assessment and Rating of Ataxia (SARA) scores, Magnetic Resonance Imaging (MRI) results, Electrodiagnostic exams (EDX), and biomarker features. Our genetic investigations included single-gene testing, Whole Exome Sequencing (WES), and Whole Genome Sequencing (WGS). Our study enrolled 162 patients from various geographic regions of our country. Among our subpopulations, we identified known and novel pathogenic variants in 42 genes in 97 families. The overall genetic diagnostic rate was 59.9%. Notably, we observed PLA2G6, ATM, SACS, and SCA variants in 19, 14, 12, and 10 families, respectively. Remarkably, more than 59% of the cases were attributed to pathogenic variants in these genes. Iran, being at the crossroad of the Middle East, exhibits a highly diverse genetic etiology for autosomal recessive hereditary ataxia. In light of this heterogeneity, the development of preventive strategies and targeted molecular therapeutics becomes crucial. A national guideline for the diagnosis and management of patients with these conditions could significantly aid in advancing healthcare approaches and improving patient outcomes.","PeriodicalId":13183,"journal":{"name":"Human Genomics","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Human Genomics","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1186/s40246-024-00598-5","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GENETICS & HEREDITY","Score":null,"Total":0}
引用次数: 0
Abstract
To investigate the genetics of early-onset progressive cerebellar ataxia in Iran, we conducted a study at the Children’s Medical Center (CMC), the primary referral center for pediatric disorders in the country, over a three-year period from 2019 to 2022. In this report, we provide the initial findings from the national registry. We selected all early-onset patients with an autosomal recessive mode of inheritance to assess their phenotype, paraclinical tests, and genotypes. The clinical data encompassed clinical features, the Scale for the Assessment and Rating of Ataxia (SARA) scores, Magnetic Resonance Imaging (MRI) results, Electrodiagnostic exams (EDX), and biomarker features. Our genetic investigations included single-gene testing, Whole Exome Sequencing (WES), and Whole Genome Sequencing (WGS). Our study enrolled 162 patients from various geographic regions of our country. Among our subpopulations, we identified known and novel pathogenic variants in 42 genes in 97 families. The overall genetic diagnostic rate was 59.9%. Notably, we observed PLA2G6, ATM, SACS, and SCA variants in 19, 14, 12, and 10 families, respectively. Remarkably, more than 59% of the cases were attributed to pathogenic variants in these genes. Iran, being at the crossroad of the Middle East, exhibits a highly diverse genetic etiology for autosomal recessive hereditary ataxia. In light of this heterogeneity, the development of preventive strategies and targeted molecular therapeutics becomes crucial. A national guideline for the diagnosis and management of patients with these conditions could significantly aid in advancing healthcare approaches and improving patient outcomes.
期刊介绍:
Human Genomics is a peer-reviewed, open access, online journal that focuses on the application of genomic analysis in all aspects of human health and disease, as well as genomic analysis of drug efficacy and safety, and comparative genomics.
Topics covered by the journal include, but are not limited to: pharmacogenomics, genome-wide association studies, genome-wide sequencing, exome sequencing, next-generation deep-sequencing, functional genomics, epigenomics, translational genomics, expression profiling, proteomics, bioinformatics, animal models, statistical genetics, genetic epidemiology, human population genetics and comparative genomics.