Molecular Genetics & Genomic Medicine最新文献

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Synonymous variant at the terminal nucleotide in exon 3 of F7 causes abnormal splicing: A case report. F7 第 3 外显子末端核苷酸的同义变异导致剪接异常:病例报告
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2492
Liya Wang, Wenshan Zeng, Yeqing Qian, Yixi Sun, Min Chen, Bei Liu, Junjie Hu, Ping Yu, Minyue Dong
{"title":"Synonymous variant at the terminal nucleotide in exon 3 of F7 causes abnormal splicing: A case report.","authors":"Liya Wang, Wenshan Zeng, Yeqing Qian, Yixi Sun, Min Chen, Bei Liu, Junjie Hu, Ping Yu, Minyue Dong","doi":"10.1002/mgg3.2492","DOIUrl":"10.1002/mgg3.2492","url":null,"abstract":"<p><strong>Background: </strong>Synonymous variants are non-pathogenic due to non-substitution of amino acids. However, synonymous exonic terminal nucleotide substitutions may affect splicing. Splicing variants are easily analyzed at RNA level for genes expressed in blood cells. Minigene analysis provides another method for splicing variant analysis of genes that are poorly or not expressed in peripheral blood.</p><p><strong>Methods: </strong>Whole exome sequencing was performed to screen for potential pathogenic mutations in the proband, which were validated within the family by Sanger sequencing. The pathogenicity of the synonymous mutation was analyzed using the minigene technology.</p><p><strong>Results: </strong>The proband harbored the compound heterogeneous variants c. [291G >A; 572-50C >T] and c.681 + 1G >T in F7, of which the synonymous variant c.291G >A was located at the terminal position of exon 3. Minigene analysis revealed exon3 skipping due to this mutation, which may have subsequently affected protein sequence, structure, and function.</p><p><strong>Conclusion: </strong>Our finding confirmed the pathogenicity of c.291G >A, thus extending the pathogenic mutation spectrum of F7, and providing insights for effective reproductive counseling.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11247393/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141616866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clinical and genetic variability among Bulgarian patients with autosomal recessive spastic ataxia of Charlevoix-Saguenay. 保加利亚常染色体隐性遗传性痉挛性共济失调(Charlevoix-Saguenay)患者的临床和遗传变异。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2483
Teodora Chamova, Neviana Ivanova, Sylvia Cherninkova, Maya Koleva, Dora Zlatareva, Veneta Bojinova, Kalina Mihova, Martin Georgiev, Dilyan Ferdinandov, Stoyan Bichev, Radka Kaneva, Vanio Mitev, Albena Jordanova, Ivailo Tournev
{"title":"Clinical and genetic variability among Bulgarian patients with autosomal recessive spastic ataxia of Charlevoix-Saguenay.","authors":"Teodora Chamova, Neviana Ivanova, Sylvia Cherninkova, Maya Koleva, Dora Zlatareva, Veneta Bojinova, Kalina Mihova, Martin Georgiev, Dilyan Ferdinandov, Stoyan Bichev, Radka Kaneva, Vanio Mitev, Albena Jordanova, Ivailo Tournev","doi":"10.1002/mgg3.2483","DOIUrl":"10.1002/mgg3.2483","url":null,"abstract":"<p><strong>Background: </strong>Autosomal recessive spastic ataxia ofCharlevoix-Saguenay (ARSACS) is a rare neurodegenerative disorder characterizedby early-onset cerebellar ataxia, peripheral sensorimotor neuropathy, and lowerlimb spasticity. We present clinical andgenetic data of the first Bulgarian patients diagnosed with ARSACS by wholeexome sequencing (WES).</p><p><strong>Methods: </strong>Variant filtering was performed usinglocally established pipeline and the selected variants were analysed by Sangersequencing. All patients underwent clinical examination and testingincluding the standard rating scales for spastic paraplegia and ataxia.</p><p><strong>Results: </strong>Five different SACS gene variants, three of which novel, have been identified inpatients from three different ethnic groups. In addition to the classicalclinical triad, brain MRI revealed cerebellar atrophy, linear pontineT2-hypointensities, and hyperintense rim lateral tothalamus combined with retinal nerve fiber layer thickening on opticcoherence tomography (OCT).</p><p><strong>Conclusion: </strong>We expand the mutation, geographic, and phenotypic spectrum of ARSACS, adding Bulgaria to the world map of the disease, and drawing attention to the fact that it is still misdiagnosed. We demonstrated that brain MRI and OCT are necessary clinical tests for ARSACS diagnosis, even if one of the cardinal clinical features is lacking.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11266115/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141752163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multisystem disorder associated with a pathogenic variant in CLCN7 in the absence of osteopetrosis. 与 CLCN7 的一个致病变体有关的多系统疾病,但没有骨化症。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2494
Chung-Lin Lee, Yeun-Wen Chang, Hsiang-Yu Lin, Hung-Chang Lee, Ting-Chi Yeh, Li-Ching Fang, Ni-Chung Lee, Jeng-Daw Tsai, Shuan-Pei Lin
{"title":"Multisystem disorder associated with a pathogenic variant in CLCN7 in the absence of osteopetrosis.","authors":"Chung-Lin Lee, Yeun-Wen Chang, Hsiang-Yu Lin, Hung-Chang Lee, Ting-Chi Yeh, Li-Ching Fang, Ni-Chung Lee, Jeng-Daw Tsai, Shuan-Pei Lin","doi":"10.1002/mgg3.2494","DOIUrl":"10.1002/mgg3.2494","url":null,"abstract":"<p><strong>Background: </strong>We clinically and genetically evaluated a Taiwanese boy presenting with developmental delay, organomegaly, hypogammaglobulinemia and hypopigmentation without osteopetrosis. Whole-exome sequencing revealed a de novo gain-of-function variant, p.Tyr715Cys, in the C-terminal domain of ClC-7 encoded by CLCN7.</p><p><strong>Methods: </strong>Nicoli et al. (2019) assessed the functional impact of p.Tyr715Cys by heterologous expression in Xenopus oocytes and evaluating resulting currents.</p><p><strong>Results: </strong>The variant led to increased outward currents, indicating it underlies the patient's phenotype of lysosomal hyperacidity, storage defects and vacuolization. This demonstrates the crucial physiological role of ClC-7 antiporter activity in maintaining appropriate lysosomal pH.</p><p><strong>Conclusion: </strong>Elucidating mechanisms by which CLCN7 variants lead to lysosomal dysfunction will advance understanding of genotype-phenotype correlations. Identifying modifier genes and compensatory pathways may reveal therapeutic targets. Ongoing functional characterization of variants along with longitudinal clinical evaluations will continue advancing knowledge of ClC-7's critical roles and disease mechanisms resulting from its dysfunction. Expanded cohort studies are warranted to delineate the full spectrum of associated phenotypes.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11273547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141759839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prenatal diagnosis and genetic study of 22q11.2 microduplication in Chinese fetuses: A series of 31 cases and literature review. 中国胎儿 22q11.2 微重复的产前诊断和遗传学研究:31例系列病例及文献综述。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2498
Xiali Jiang, Bin Liang, Shuqiong He, Xiaoqing Wu, Wantong Zhao, Huili Xue, Yan Wang, Na Lin, Hailong Huang, Liangpu Xu
{"title":"Prenatal diagnosis and genetic study of 22q11.2 microduplication in Chinese fetuses: A series of 31 cases and literature review.","authors":"Xiali Jiang, Bin Liang, Shuqiong He, Xiaoqing Wu, Wantong Zhao, Huili Xue, Yan Wang, Na Lin, Hailong Huang, Liangpu Xu","doi":"10.1002/mgg3.2498","DOIUrl":"10.1002/mgg3.2498","url":null,"abstract":"<p><strong>Background: </strong>Patients with 22q11.2 microduplication syndrome exhibit a high degree of phenotypic heterogeneity and incomplete penetrance, making prenatal diagnosis challenging due to phenotypic variability. This report aims to raise awareness among prenatal diagnostic practitioners regarding the variant's complexity, providing a basis for prenatal genetic counseling.</p><p><strong>Methods: </strong>Family and clinical data of 31 fetuses with 22q11.2 microduplications confirmed by chromosomal microarray between June 2017 and June 2023 were considered.</p><p><strong>Results: </strong>Primary prenatal ultrasound features of affected fetuses include variable cardiac and cardiovascular anomalies, increased nuchal translucency (≥3 mm), renal abnormalities, and polyhydramnios. More than half of fetuses considered showed no intrauterine manifestations; therefore, prenatal diagnostic indicators were primarily advanced maternal age or high-risk Down syndrome screening. Most fetuses had microduplications in proximal or central 22q11.2 regions, with only three cases with distal microduplications. Among parents of fetuses considered, 87% (27/31) continued the pregnancy. During follow-up, 19 cases remained clinically asymptomatic.</p><p><strong>Conclusion: </strong>Nonspecific 22q11.2 microduplication features in fetuses and its mild postnatal disease presentation highlight the need to cautiously approach prenatal diagnosis and pregnancy decision-making. Increased clinical efforts should be made regarding providing parents with specialized genetic counseling, long-term follow-up, and fetal risk information.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11258554/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141731351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel variant c.902C>A (p. A301D) in KCNQ4 associated with non-syndromic deafness 2A in a Chinese family. 一个中国家庭中与非综合征性耳聋 2A 相关的 KCNQ4 新变异 c.902C>A (p. A301D)。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2446
Lingyan Ren, Jiangfen Wu, Ying Kuang, Kun Chen, Minmin Jiang, Zhaozhen Zhuo, Zuwei Cao, Shengwen Huang
{"title":"A novel variant c.902C>A (p. A301D) in KCNQ4 associated with non-syndromic deafness 2A in a Chinese family.","authors":"Lingyan Ren, Jiangfen Wu, Ying Kuang, Kun Chen, Minmin Jiang, Zhaozhen Zhuo, Zuwei Cao, Shengwen Huang","doi":"10.1002/mgg3.2446","DOIUrl":"10.1002/mgg3.2446","url":null,"abstract":"<p><strong>Background: </strong>Deafness autosomal dominant 2A (DFNA2A) is related to non-syndromic genetic hearing impairment. The KCNQ4 (Potassium Voltage-Gated Channel Subfamily Q Member 4) can lead to DFNA2A. In this study, we report a case of autosomal dominant non-syndromic hearing loss with six family members as caused by a novel variant in the KCNQ4 gene.</p><p><strong>Methods: </strong>The whole-exome sequencing (WES) and pure tone audiometry were performed on the proband of the family. Sanger sequencing was conducted on family members to determine if the novel variant in the KCNQ4 gene was present. Evolutionary conservation analysis and computational tertiary structure protein prediction of the wild-type KCNQ4 protein and its variant were then performed. In addition, voltage-gated channel activity of the wild-type KCNQ4 protein and its variant were tested using whole-cell patch clamp.</p><p><strong>Results: </strong>It was observed that the proband had inherited autosomal dominant, non-syndromic sensorineural hearing loss as a trait. A novel co-segregating heterozygous missense variant (c.902C>A, p.Ala301Asp) of the KCNQ4 gene was identified in the proband and other five affected family members. This variant was predicted to cause an alanine-to-aspartic acid substitution at position 301 in the KCNQ4 protein. The alanine at position 301 is well conserved across different species. Whole-cell patch clamp showed that there was a significant difference between the WT protein currents and the mutant protein currents in the voltage-gated channel activity.</p><p><strong>Conclusion: </strong>In the present study, performing WES in conjunction with Sanger sequencing enhanced the detection of a novel, potentially causative variant (c301 A>G; p.Ala301Asp) in exon 6 of the KCNQ4 gene. Therefore, our findings contributed to the mutation spectrum of the KCNQ4 gene and may be useful in the diagnosis and gene therapy of deafness autosomal dominant 2A.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11232888/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141563774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Glucose-6-phosphate dehydrogenase deficiency as a cause for nonimmune hydrops fetalis and severe fetal anemia: A systematic review. 葡萄糖-6-磷酸脱氢酶缺乏症是导致非免疫性胎儿水肿和严重胎儿贫血的原因之一:系统综述。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2491
Neel S Iyer, Matthew H Mossayebi, Tracy J Gao, Lylach Haizler-Cohen, Daniele Di Mascio, Rodney A McLaren, Huda B Al-Kouatly
{"title":"Glucose-6-phosphate dehydrogenase deficiency as a cause for nonimmune hydrops fetalis and severe fetal anemia: A systematic review.","authors":"Neel S Iyer, Matthew H Mossayebi, Tracy J Gao, Lylach Haizler-Cohen, Daniele Di Mascio, Rodney A McLaren, Huda B Al-Kouatly","doi":"10.1002/mgg3.2491","DOIUrl":"10.1002/mgg3.2491","url":null,"abstract":"<p><strong>Background: </strong>Glucose-6-phosphate dehydrogenase (G6PD) deficiency is an X-linked recessive disorder that predisposes individuals to hemolysis due to an inborn error of metabolism. We performed a systematic literature review to evaluate G6PD deficiency as a possible etiology of nonimmune hydrops fetalis (NIHF) and severe fetal anemia.</p><p><strong>Methods: </strong>PubMed, OVID Medline, Scopus, and clinicaltrials.gov were queried from inception until 31 April 2023 for all published cases of NIHF and severe fetal anemia caused by G6PD deficiency. Keywords included \"fetal edema,\" \"hydrops fetalis,\" \"glucose 6 phosphate dehydrogenase deficiency,\" and \"fetal anemia.\" Cases with workup presuming G6PD deficiency as an etiology for NIHF and severe fetal anemia were included. PRISMA guidelines were followed.</p><p><strong>Results: </strong>Five cases of G6PD-related NIHF and one case of severe fetal anemia were identified. Four fetuses (4/6, 66.7%) were male and two fetuses (2/6, 33.3%) were female. Mean gestational age at diagnosis of NIHF/anemia and delivery was 32.2 ± 4.9 and 35.7 ± 2.4 weeks, respectively. Four cases (66.7%) required a cordocentesis for fetal transfusion, and two cases (33.3%) received blood transfusions immediately following delivery. Among the four multigravida cases, two (50%) noted previous pregnancies complicated by neonatal anemia. When reported, the maternal cases included two G6PD deficiency carrier patients and two G6PD-deficient patients. Exposures to substances known to cause G6PD deficiency-related hemolysis occurred in 3/6 (50%) cases.</p><p><strong>Conclusion: </strong>Six cases of NIHF/severe fetal anemia were associated with G6PD deficiency. While G6PD deficiency is an X-linked recessive condition, female fetuses can be affected. Fetal G6PD deficiency testing can be considered if parental history indicates, particularly if the standard workup for NIHF is negative.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11264253/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141748653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Targeted next-generation sequencing reveals the genetic mechanism of Chinese Marfan syndrome cohort with ocular manifestation. 靶向新一代测序揭示中国马凡氏综合征队列眼部表现的遗传机制。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2482
Dongming Han, Ziwei Wang, Xuan Chen, Zijia Liu, Zhengtao Yang, Yixi Chen, Peiyi Tian, Jiankang Li, ZhuoShi Wang
{"title":"Targeted next-generation sequencing reveals the genetic mechanism of Chinese Marfan syndrome cohort with ocular manifestation.","authors":"Dongming Han, Ziwei Wang, Xuan Chen, Zijia Liu, Zhengtao Yang, Yixi Chen, Peiyi Tian, Jiankang Li, ZhuoShi Wang","doi":"10.1002/mgg3.2482","DOIUrl":"10.1002/mgg3.2482","url":null,"abstract":"<p><strong>Background: </strong>Marfan syndrome (MFS) is a hereditary connective tissue disorder involving multiple systems, including ophthalmologic abnormalities. Most cases are due to heterozygous mutations in the fibrillin-1 gene (FBN1). Other associated genes include LTBP2, MYH11, MYLK, and SLC2A10. There is significant clinical overlap between MFS and other Marfan-like disorders.</p><p><strong>Purpose: </strong>To expand the mutation spectrum of FBN1 gene and validate the pathogenicity of Marfan-related genes in patients with MFS and ocular manifestations.</p><p><strong>Methods: </strong>We recruited 318 participants (195 cases, 123 controls), including 59 sporadic cases and 88 families. All patients had comprehensive ophthalmic examinations showing ocular features of MFS and met Ghent criteria. Additionally, 754 cases with other eye diseases were recruited. Panel-based next-generation sequencing (NGS) screened mutations in 792 genes related to inherited eye diseases.</p><p><strong>Results: </strong>We detected 181 mutations with an 84.7% detection rate in sporadic cases and 87.5% in familial cases. The overall detection rate was 86.4%, with FBN1 accounting for 74.8%. In cases without FBN1 mutations, 23 mutations from seven Marfan-related genes were identified, including four pathogenic or likely pathogenic mutations in LTBP2. The 181 mutations included 165 missenses, 10 splicings, three frameshifts, and three nonsenses. FBN1 accounted for 53.0% of mutations. The most prevalent pathogenic mutation was FBN1 c.4096G>A. Additionally, 94 novel mutations were detected, with 13 de novo mutations in 14 families.</p><p><strong>Conclusion: </strong>We expanded the mutation spectrum of the FBN1 gene and provided evidence for the pathogenicity of other Marfan-related genes. Variants in LTBP2 may contribute to the ocular manifestations in MFS, underscoring its role in phenotypic diversity.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11220501/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141492676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A compound heterozygote case of glutaric aciduria type II in a patient carrying a novel candidate variant in ETFDH gene: A case report and literature review on compound heterozygote cases. 一名携带 ETFDH 基因新型候选变体的戊二酸尿症 II 型复合杂合子病例:一份病例报告和有关复合杂合子病例的文献综述。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2489
Mohammad Reza Seyedtaghia, Reza Jafarzadeh-Esfehani, Seyedmojtaba Hosseini, Sepehr Kobravi, Mahdis Hakkaki, Yalda Nilipour
{"title":"A compound heterozygote case of glutaric aciduria type II in a patient carrying a novel candidate variant in ETFDH gene: A case report and literature review on compound heterozygote cases.","authors":"Mohammad Reza Seyedtaghia, Reza Jafarzadeh-Esfehani, Seyedmojtaba Hosseini, Sepehr Kobravi, Mahdis Hakkaki, Yalda Nilipour","doi":"10.1002/mgg3.2489","DOIUrl":"10.1002/mgg3.2489","url":null,"abstract":"<p><strong>Background: </strong>Glutaric aciduria type II (GA2) is a rare genetic disorder inherited in an autosomal recessive manner. Double dosage mutations in GA2 corresponding genes, ETFDH, ETFA, and ETFB, lead to defects in the catabolism of fatty acids, and amino acids lead to broad-spectrum phenotypes, including muscle weakness, developmental delay, and seizures. product of these three genes have crucial role in transferring electrons to the electron transport chain (ETC), but are not directly involve in ETC complexes.</p><p><strong>Methods: </strong>Here, by using exome sequencing, the cause of periodic cryptic gastrointestinal complications in a 19-year-old girl was resolved after years of diagnostic odyssey. Protein modeling for the novel variant served as another line of validation for it.</p><p><strong>Results: </strong>Exome Sequencing (ES) identified two variants in ETFDH: ETFDH:c.926T>G and ETFDH:c.1141G>C. These variants are likely contributing to the crisis in this case. To the best of our knowledge at the time of writing this manuscript, variant ETFDH:c.926T>G is reported here for the first time. Clinical manifestations of the case and pathological analysis are in consistent with molecular findings. Protein modeling provided another line of evidence proving the pathogenicity of the novel variant. ETFDH:c.926T>G is reported here for the first time in relation to the causation GA2.</p><p><strong>Conclusion: </strong>Given the milder symptoms in this case, a review of GA2 cases caused by compound heterozygous mutations was conducted, highlighting the range of symptoms observed in these patients, from mild fatigue to more severe outcomes. The results underscore the importance of comprehensive genetic analysis in elucidating the spectrum of clinical presentations in GA2 and guiding personalized treatment strategies.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11225075/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141534849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel variant in the FLCN gene in a Chinese family with Birt-Hogg-Dubé syndrome. 一个中国 Birt-Hogg-Dubé 综合征家族中的 FLCN 基因新变异。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2488
He Miao, Yulin Zhou, Silun Ge, Yufeng Gu, Le Qu, Wenquan Zhou, Haowei He
{"title":"A novel variant in the FLCN gene in a Chinese family with Birt-Hogg-Dubé syndrome.","authors":"He Miao, Yulin Zhou, Silun Ge, Yufeng Gu, Le Qu, Wenquan Zhou, Haowei He","doi":"10.1002/mgg3.2488","DOIUrl":"10.1002/mgg3.2488","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to identify disease-causing variants within a Chinese family affected by Birt-Hogg-Dubé syndrome (BHDS), which arises from an autosomal dominant inheritance pattern attributed to variants in the folliculin (FLCN) gene, recognized as a tumor suppressor gene.</p><p><strong>Methods: </strong>A Chinese proband diagnosed with BHDS due to renal tumors underwent next-generation sequencing (NGS), revealing a novel variant in the FLCN gene. Sanger sequencing was subsequently performed on blood samples obtained from family members to confirm the presence of this variant.</p><p><strong>Results: </strong>A novel germline frameshift variant (NM_144997.5:c.977dup) was identified in five individuals among the screened family members, marking the first report of this variant. Additionally, a somatic frameshift variant (NM_144997.5:c.1252del) was detected in the renal tumors of the proband. No variant was detected in unaffected family members.</p><p><strong>Conclusions: </strong>A novel heterozygous variant was identified in exon 9 of the FLCN gene, which broadens the spectrum of FLCN variants. We recommend that molecular analysis of the FLCN gene be performed in patients with suspected BHDS and their families.</p>","PeriodicalId":18852,"journal":{"name":"Molecular Genetics & Genomic Medicine","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11222970/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141498457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to "In silico validation revealed the role of SCN5A mutations and their genotype-phenotype correlations in Brugada syndrome". 对 "硅学验证揭示了 SCN5A 突变及其基因型与表型在 Brugada 综合征中的作用 "的更正。
IF 1.5 4区 医学
Molecular Genetics & Genomic Medicine Pub Date : 2024-07-01 DOI: 10.1002/mgg3.2487
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