S. Ahmadipour, Golnaz Mahmoudvand, Arshia Fakouri, Simin Farokhi, A. Karimi Rouzbahani
{"title":"A Novel NALCN Homozygote Variant in Non-related Infants with IHPRF1 Syndrome: A Report of 2 Cases","authors":"S. Ahmadipour, Golnaz Mahmoudvand, Arshia Fakouri, Simin Farokhi, A. Karimi Rouzbahani","doi":"10.5812/ijp-134610","DOIUrl":null,"url":null,"abstract":"Introduction: Sodium leak channel, non-selective (NALCN) is an ion channel with an important function in neuronal excitability. The activity of NALCN is essential in the balance of rhythmic behaviors. Infantile hypotonia with psychomotor retardation and characteristic facies 1 (IHPRF1), which occurs due to biallelic NALCN variants, leads to dysmorphic characteristics and global developmental delay. We hereby report 2 non-related patients with IHPRF1 syndrome. Case Presentation: The first case was a 1 - year-old girl referred to our center because of constipation and poor weight gain, and the other was a 2 - year-old girl presenting with hypotonia, constipation, and poor weight gain. Whole exome sequencing led to the detection of homozygote NALCN variants. Interestingly, in both cases, a novel variant of c.1434 + 1G>A in NACLN was identified, which, to the best of our knowledge, has not been reported as a pathogenic variant so far. Conclusions: NALCN dysfunctions lead to rare yet clinically significant disorders. Due to the potential mortality, further studies are essential for a more comprehensive understanding of these rare disorders.","PeriodicalId":14593,"journal":{"name":"Iranian Journal of Pediatrics","volume":"8 1","pages":""},"PeriodicalIF":0.4000,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Journal of Pediatrics","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.5812/ijp-134610","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PEDIATRICS","Score":null,"Total":0}
引用次数: 0
Abstract
Introduction: Sodium leak channel, non-selective (NALCN) is an ion channel with an important function in neuronal excitability. The activity of NALCN is essential in the balance of rhythmic behaviors. Infantile hypotonia with psychomotor retardation and characteristic facies 1 (IHPRF1), which occurs due to biallelic NALCN variants, leads to dysmorphic characteristics and global developmental delay. We hereby report 2 non-related patients with IHPRF1 syndrome. Case Presentation: The first case was a 1 - year-old girl referred to our center because of constipation and poor weight gain, and the other was a 2 - year-old girl presenting with hypotonia, constipation, and poor weight gain. Whole exome sequencing led to the detection of homozygote NALCN variants. Interestingly, in both cases, a novel variant of c.1434 + 1G>A in NACLN was identified, which, to the best of our knowledge, has not been reported as a pathogenic variant so far. Conclusions: NALCN dysfunctions lead to rare yet clinically significant disorders. Due to the potential mortality, further studies are essential for a more comprehensive understanding of these rare disorders.
期刊介绍:
Iranian Journal of Pediatrics (Iran J Pediatr) is a peer-reviewed medical publication. The purpose of Iran J Pediatr is to increase knowledge, stimulate research in all fields of Pediatrics, and promote better management of pediatric patients. To achieve the goals, the journal publishes basic, biomedical, and clinical investigations on prevalent diseases relevant to pediatrics. The acceptance criteria for all papers are the quality and originality of the research and their significance to our readership. Except where otherwise stated, manuscripts are peer-reviewed by minimum three anonymous reviewers. The Editorial Board reserves the right to refuse any material for publication and advises that authors should retain copies of submitted manuscripts and correspondence as the material cannot be returned. Final acceptance or rejection rests with the Editors.