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Ding F, Hou F, Shan S, Zhao Y, Jin H. Case report and functional verification of a novel mutation in the interferon regulatory transcription factor 6 gene in a family with orofacial clefts. Am J Transl Res 2024; 16:2898-2909. [PMID: 39114717 PMCID: PMC11301462 DOI: 10.62347/iaqv2788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 05/29/2024] [Indexed: 08/10/2024]
Abstract
BACKGROUND This study aimed to identify the causative genetic variant in a Chinese family with orofacial clefts. METHODS We retrospectively analyzed the clinical information of a family with orofacial clefts. Then, we performed an etiological genetic analysis of the family using whole exome sequencing analysis and Sanger sequencing. We created a hybrid code-shifting mutation cell line (293T-462het) and evaluated its impact on cell proliferation, migration, and apoptosis, as well as E-cadherin and vimentin expression. RESULTS Whole exome sequencing revealed a novel heterozygous variant c.1386del (p.A462Pfs*28) in the interferon regulatory transcription factor 6 (IRF6) gene in a family with orofacial clefts. Sanger sequencing further confirmed that this heterozygous variant was the genetic cause of orofacial clefts in this family. The c.1386del variant of IRF6 was classified as likely pathogenic. The heterozygous mutation IRF6 (c.1386del) enhanced cell proliferation and migration while inhibiting cell apoptosis and regulating the expression of E-cadherin and vimentin. CONCLUSION This study identified a novel c.1386del mutation in the IRF6 gene and explored how this mutation leads to lip and palate defects. Our results provide a solid theoretical foundation for future genetic detection of these orofacial defects.
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Affiliation(s)
- Fengjuan Ding
- Department of Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital Jinan 250001, Shandong, China
| | - Fei Hou
- Department of Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital Jinan 250001, Shandong, China
| | - Shan Shan
- Department of Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital Jinan 250001, Shandong, China
| | - Yan Zhao
- Department of Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital Jinan 250001, Shandong, China
| | - Hua Jin
- Department of Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital Jinan 250001, Shandong, China
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Tian W, Li H, Li Y, Guo J, Wang H, Yang B, Li P, Cui X, Liu L. A novel missense variant in OTUD5 causes X-linked multiple congenital anomalies-neurodevelopmental syndrome. Mol Genet Genomic Med 2024; 12:e2325. [PMID: 38037881 PMCID: PMC10767676 DOI: 10.1002/mgg3.2325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 10/13/2023] [Accepted: 11/10/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND The OTUD5 gene encodes a deubiquitinating enzyme (DUB) of the OTU family. Variants of OTUD5 are associated with X-linked multiple congenital anomalies-neurodevelopmental syndrome (MCAND). The case described in this study expands the clinical and molecular spectrum of OTUD5. METHODS Trio-based clinical exome sequencing (trio-CES) was performed on a Chinese boy with a clinical phenotype and both of his parents. Sanger sequencing was employed for validation of the variant detected. RESULTS The patient presented with characteristic facial features, intellectual disability, motor/language/cognitive, and global developmental delays, limb contractures, and kidney abnormalities, and trio-CES identified a de novo missense variant, c.1305T>A, of the OTUD5 gene. DISCUSSION We describe OTUD5 gene variation in the Chinese population, with the first report of this variant. Additionally, we provide a comprehensive summary of all published cases of MCAND to date, in order to elucidate the primary clinical features of the syndrome and the variability in phenotype severity. This case expands the genetic and clinical phenotypic spectrum of OTUD5-associated MCAND.
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Affiliation(s)
- Weifang Tian
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Haiyu Li
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Ying Li
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Jing Guo
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Handuo Wang
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Bo Yang
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Pengyun Li
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Xueyin Cui
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
| | - Ling Liu
- Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan ProvinceZhengzhouChina
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Jiang N, Vazquez Do Campo R, Kazamel M. Case report: A novel homozygous histidine triad nucleotide-binding protein 1 mutation featuring distal hereditary motor-predominant neuropathy with rimmed vacuoles. Front Neurol 2023; 14:1007051. [PMID: 36846110 PMCID: PMC9943687 DOI: 10.3389/fneur.2023.1007051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 01/17/2023] [Indexed: 02/08/2023] Open
Abstract
Introduction Recessive mutations in the gene encoding the histidine triad nucleotide-binding protein 1 (HINT1) are associated with axonal motor-predominant Charcot-Marie-Tooth (CMT) disease with neuromyotonia. A total of 24 HINT1 gene mutations have been reported so far. Some of these cases had mild to moderate elevations of creatinine kinase with no earlier reports of muscle biopsy findings in these cases. In this study, we describe a patient with axonal motor-predominant neuropathy and myopathy with rimmed vacuoles, likely due to a novel HINT1 gene mutation. Case report A 35-year-old African American man presented with insidious onset and progressive symmetric distal leg weakness followed by hand muscle atrophy and weakness since the age of 25. He had no muscle cramps or sensory complaints. His 38-year-old brother developed similar symptoms beginning in his early 30 s. On neurologic examination, the patient had distal weakness and atrophy in all limbs, claw hands, pes cavus, absent Achilles reflexes, and normal sensory examination. Electrodiagnostic studies revealed absent/reduced compound motor action potential amplitudes distally with normal sensory responses with no neuromyotonia. His sural nerve biopsy showed a chronic non-specific axonal neuropathy, and a biopsy of the tibialis anterior muscle demonstrated myopathic features and several muscle fibers harboring rimmed vacuoles without inflammation in addition to chronic denervation changes. A homozygous variant, p.I63N (c.188T > A), in the HINT1 gene was found in both brothers. Conclusion We describe a novel, likely pathogenic, HINT1 pI63N (c.188T > A) homozygous variant associated with hereditary axonal motor-predominant neuropathy without neuromyotonia in two African American brothers. The presence of rimmed vacuoles on muscle biopsy raises the possibility that mutations in the HINT1 gene may also cause myopathy.
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Affiliation(s)
- Nan Jiang
- Division of Neuromuscular Disease, Department of Neurology, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Rocio Vazquez Do Campo
- Division of Neuromuscular Disease, Department of Neurology, The University of Alabama at Birmingham, Birmingham, AL, United States
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Morel V, Campana-Salort E, Boyer A, Esselin F, Walther-Louvier U, Querin G, Latour P, Lia AS, Magdelaine C, Beze-Beyrie P, Behin A, Delague V, Levy N, Stojkovic T, Attarian S, Bonello-Palot N. HINT1 neuropathy: Expanding the genotype and phenotype spectrum. Clin Genet 2022; 102:379-390. [PMID: 35882622 DOI: 10.1111/cge.14198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 01/07/2023]
Abstract
Inherited peripheral neuropathy (IPN) is a heterogeneous group of disorders due to pathogenic variation in more than 100 genes. In 2012, the first cases of IPN associated with HINT1 pathogenic variations were described in 33 families sharing the same phenotype characterized by an axonal neuropathy with neuromyotonia and autosomal recessive inheritance (NMAN: OMIM #137200). Histidine Triad Nucleotide Binding Protein 1 regulates transcription, cell-cycle control, and is possibly involved in neuropsychiatric pathophysiology. Herein, we report seven French patients with NMAN identified by Next Generation Sequencing. We conducted a literature review and compared phenotypic and genotypic features with our cohort. We identified a new HINT1 pathogenic variation involved in NMAN: c.310G>C p.(Gly104Arg). This cohort is comparable with literature data regarding age of onset (7,4yo), neuronal involvement (sensorimotor 3/7 and motor pure 4/7), and skeletal abnormalities (scoliosis 3/7, feet anomalies 6/7). We expand the phenotypic spectrum of HINT1-related neuropathy by describing neurodevelopmental or psychiatric features in six out of seven individuals such as generalized anxiety disorder (GAD), obsessive-compulsive disorder (OCD), mood disorder and attention deficit hyperactivity disorder (ADHD). However, only 3/128 previously described patients had neuropsychiatric symptomatology or neurodevelopmental disorder. These features could be part of HINT1-related disease, and we should further study the clinical phenotype of the patients.
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Affiliation(s)
- Victor Morel
- APHM, CHU Timone, Département de Génétique Médicale, Marseille, France
| | - Emmanuelle Campana-Salort
- APHM, CHU Timone, Centre de référence des Maladies Neuromusculaires et de la SLA, ERN-NMD, Marseille, France
| | - Amandine Boyer
- APHM, CHU Timone, Département de Génétique Médicale, Marseille, France
| | - Florence Esselin
- CHU Montpellier, Centre de référence des Maladies du Motoneurone et des Maladies Neuromusculaires, Montpellier, France
| | - Ulrike Walther-Louvier
- CHU Montpellier, Service de Neuropédiatrie, Centre de référence des Maladies Neuromusculaires AOC (Atlantique-Occitanie-Caraïbe), Montpellier, France
| | - Giorgia Querin
- APHP, Hôpital Pitié-Salpêtrière, Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France, Paris, France.,Institut de Myologie I-Motion clinical trials platform, Hôpital Pitié-Salpêtrière, Paris, France
| | - Philippe Latour
- CHU de Lyon, GH Est, Service de Biochimie et Biologie Moléculaire Grand Est, Bron, France
| | - Anne-Sophie Lia
- Service de Biochimie et Génétique Moléculaire, CHU, Limoges, France
| | | | | | - Anthony Behin
- APHP, Hôpital Pitié-Salpêtrière, Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France, Paris, France
| | - Valérie Delague
- INSERM, MMG, U 1251, Marseille, France, Aix Marseille Univ, Marseille, France
| | - Nicolas Levy
- APHM, CHU Timone, Département de Génétique Médicale, Marseille, France.,INSERM, MMG, U 1251, Marseille, France, Aix Marseille Univ, Marseille, France
| | - Tanya Stojkovic
- APHP, Hôpital Pitié-Salpêtrière, Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France, Paris, France
| | - Shahram Attarian
- APHM, CHU Timone, Centre de référence des Maladies Neuromusculaires et de la SLA, ERN-NMD, Marseille, France.,INSERM, MMG, U 1251, Marseille, France, Aix Marseille Univ, Marseille, France
| | - Nathalie Bonello-Palot
- APHM, CHU Timone, Département de Génétique Médicale, Marseille, France.,INSERM, MMG, U 1251, Marseille, France, Aix Marseille Univ, Marseille, France
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Xu L, Wang G, Lv X, Zhang D, Yan C, Lin P. A novel mutation in HINT1 gene causes autosomal recessive axonal neuropathy with neuromyotonia, effective treatment with carbamazepine and review of the literature. Acta Neurol Belg 2022; 122:1305-1312. [PMID: 35767146 DOI: 10.1007/s13760-022-02006-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 06/09/2022] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Autosomal recessive axonal neuropathy with neuromyotonia (ARAN-NM) is a rare disease entity linked to mutations in the histidine triad nucleotide binding protein 1 (HINT1) gene. The diagnosis and treatment of ARAN-NM are challenging. There have been few reports of ARAN-NM in East Asia. METHODS A 15-year-old Chinese ARAN-NM patient developed muscle weakness, cramps and atrophy in the lower limbs at the age of 12. Electromyography (EMG) showed motor axonal degeneration and neuromyotonic discharges. Whole exome sequencing was performed. Bioinformatic methods and computational 3D structure modeling were used to analyze the identified variant. According to literature review, carbamazepine was prescribed to the patient. RESULTS Genetic tests identified a homozygous mutation c.356G > T (p.R119L) in the HINT1 gene, which has never been reported before according to HGMD database. Several bioinformatic approaches predicted the variant was damaging. Computational 3D modeling indicated the variant changed the structure of HINT1 protein. Notably, we demonstrated the positive effects of carbamazepine in treating muscle stiffness and cramps of ARAN-NM. DISCUSSION 22 variants have been reported in the HINT1 gene, and we identified a novel c.356G > T (p.R119L) variant. Our study expands the genetic spectrum of ARAN-NM. Moreover, large clinical trials are required to further demonstrate the role of carbamazepine in ARAN-NM.
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Affiliation(s)
- Ling Xu
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, 250012, Shandong, China
| | - Guangyu Wang
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, 250012, Shandong, China
| | - Xiaoqing Lv
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, 250012, Shandong, China
| | - Dong Zhang
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, 250012, Shandong, China
| | - Chuanzhu Yan
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, 250012, Shandong, China
| | - Pengfei Lin
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, 250012, Shandong, China.
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Fang J, Huang H, Lei Q, Luo Y, Tang Z, Shi X, Tang JG. Myasthenia gravis coexisting with HINT1-related motor axonal neuropathy without neuromyotonia: a case report. BMC Neurol 2022; 22:168. [PMID: 35501818 PMCID: PMC9063049 DOI: 10.1186/s12883-022-02690-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 04/28/2022] [Indexed: 11/18/2022] Open
Abstract
Background HINT1 mutations cause an autosomal recessive axonal neuropathy with neuromyotonia. This is a first case report of coexistence of myasthenia gravis (MG) and HINT1-related motor axonal neuropathy without neuromyotonia. Case presentation A 32-year-old woman presented with recurrent ptosis for 8 years, diplopia for 2 years and limb weakness for 1 year and a half. Neostigmine test, elevated AChR antibody level and positive repetitive nerve stimulation supported the diagnosis of MG. Electroneurography (ENG) and electromyography (EMG) examinations revealed a motor axonal neuropathy without neuromyotonic or myokymic discharges. Next-generation sequencing and Sanger sequencing were performed to identify the gene responsible for suspected hereditary neuropathy. Genetic testing for a HINT1 mutation was performed and revealed a homozygous mutation at c.278G>T (p. G93V). The patient was treated with pyridostigmine, oral prednisolone and azathioprine. Her ptosis and diplopia have significantly improved at 6-month follow-up. Conclusions Concurrence of MG and hereditary motor axonal neuropathy without neuromyotonia is quite rare. Detection of ptosis with or without ophthalmoplegia, distribution of limb weakness, and reflex can help in recognizing the combination of MG and peripheral neuropathy. Early diagnosis is important for initial treatment and prognosis. The novel homozygous variant c.278G>T(p.G93V) contributes to the pathogenic variants spectrum of the HINT1 gene.
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Affiliation(s)
- Jia Fang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hui Huang
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiang Lei
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yingying Luo
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhengchu Tang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiaoliu Shi
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jian Guang Tang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
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Chen F, Guo S, Li X, Liu S, Wang L, Zhang VW, Xu H, Huang Z, Ying Y, Shu S. Case Report: Be Aware of “New” Features of Niemann–Pick Disease: Insights From Two Pediatric Cases. Front Genet 2022; 13:845246. [PMID: 35360843 PMCID: PMC8961870 DOI: 10.3389/fgene.2022.845246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/15/2022] [Indexed: 11/14/2022] Open
Abstract
Niemann–Pick disease is a relatively common lysosomal storage disease. Cholestatic liver disease is a typical clinical phenotype of Niemann–Pick disease in infancy. The diagnosis is traditionally based on Niemann–Pick cells in bone marrow smears or liver biopsies. Treatment for cholestatic liver disease mainly includes ursodeoxycholic acid and liver protection drugs. Here, we reported two cases of Niemann–Pick disease type C, diagnosed by genetic analysis during early infancy. Besides cholestatic jaundice, the two patients also exhibited signs of immune system hyperactivity, such as elevated immunoglobulins or multiple autoantibodies, which might require the application of glucocorticoids. In addition, three novel missense variants of the NPC1 gene were identified. The findings suggest that immune activation should be considered as a “new” clinical phenotype of lysosomal storage diseases.
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Affiliation(s)
- Fan Chen
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shan Guo
- Department of Gastroenterology, Wuhan Children’s Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xuesong Li
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shengxuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Wang
- AmCare Genomics Lab, Guangzhou, China
| | | | - Hui Xu
- Department of Pathology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhihua Huang
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanqin Ying
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yanqin Ying, ; Sainan Shu,
| | - Sainan Shu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yanqin Ying, ; Sainan Shu,
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Huang Q, Jiang C, Sun J, Xue J, Zhang VW. Case report: A novel mutation in TRPS1 identified in a Chinese family with tricho-rhino-phalangeal syndrome I: A therapeutic challenge. Front Pediatr 2022; 10:990230. [PMID: 36467473 PMCID: PMC9716017 DOI: 10.3389/fped.2022.990230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 11/02/2022] [Indexed: 11/19/2022] Open
Abstract
Tricho-rhino-phalangeal syndrome (TRPS) is a rare autosomal dominant malformation caused by mutations involving the TRPS1 gene. Patients with TRPS exhibit distinctive craniofacial and skeletal abnormalities. This report presents three intra-familial cases with TRPS1 gene mutations that showed the characteristic features of TRPS. A 13-year-old boy was admitted to Department of Endocrinology for the evaluation of short stature. Physical examination revealed that the boy had thin sparse hair, pear-shaped nose, protruding ears, small jaw and brachydactyly. A survey of his family history indicated that the boy's sister and mother shared the same clinical features. Radiological techniques demonstrated a different degree of skeletal abnormalities in these siblings. Next-generation sequencing and quantitative PCR were performed and showed a novel deletion mutation in exons 3-5 in the three familial cases, confirming the diagnosis of TRPS I. The healthy father did not carry the deletion mutation. Currently, there was no specific therapy for TRPS I; however, genetic consultation may be useful for family planning.
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Affiliation(s)
- Qi Huang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Cheng Jiang
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Junli Xue
- Department of Endocrinology, The Second Clinical Medical College, Yangtze University, Jingzhou, China
| | - Victor Wei Zhang
- Department of Clinical Genetics, AmCare Genomics Lab, Guangzhou, China
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Ding FJ, Lyu GZ, Zhang VW, Jin H. Missense mutation in DYNC1H1 gene caused psychomotor developmental delay and muscle weakness: A case report. World J Clin Cases 2021; 9:9302-9309. [PMID: 34786417 PMCID: PMC8567516 DOI: 10.12998/wjcc.v9.i30.9302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/09/2021] [Accepted: 08/06/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The DYNC1H1 gene encodes a part of the dynamic protein, and the protein mutations may further affect the growth and development of neurons, resulting in degeneration of anterior horn cells of the spinal cord, and a variety of clinical phenotypes finally resulting in axonal Charcot-Marie-Tooth disease type 20 (CMT20), mental retardation 13 (MRD13) and spinal muscular atrophy with lower extremity predominant 1 (SMA-LED). The incidence of the disease is low, and it is difficult to diagnose, especially in children. Here, we report a case of DYNC1H1 gene mutation and review the related literature to improve the pediatrician’s understanding of DYNC1H1 gene-related disease to make an early correct diagnosis and provide better services for children.
CASE SUMMARY A 4-mo-old Chinese female child with adducted thumbs, high arch feet, and epileptic seizure presented slow response, delayed development, and low limb muscle strength. Electroencephalogram showed abnormal waves, a large number of multifocal sharp waves, sharp slow waves, and multiple spasms with a series of attacks. High-throughput sequencing and Sanger sequencing identified a heterozygous mutation, c.5885G>A (p.R1962H), in the DYNC1H1 gene (NM_001376) of the proband, which was not identified in her parents. Combined with the clinical manifestations and pedigree of this family, this mutation is likely pathogenic based on the American Academy of Medical Genetics and Genomics guidelines. The child was followed when she was 1 year and 2 mo old. The magnetic resonance imaging result was consistent with the findings of white matter myelinated dysplasia and congenital giant gyrus. The extensive neurogenic damage to the extremities was considered, as the results of electromyography showed that the motor conduction velocity and sensory conduction of the nerves of the extremities were not abnormal, and the degree of fit of the children with severe contraction was poor. At present, the child is 80 cm in length and 9 kg in weight, with slender limbs and low muscle strength, and still does not raise her head. She cannot sit or speak. Speech, motor, and mental development was significantly delayed. There is still no effective treatment for this disease.
CONCLUSION We herein report a de novo variant of DYNC1H1 gene, c.5885G>A (p.R1962H), leading to overlapping phenotypes (seizure, general growth retardation, and muscle weakness) of CMT20, MRD13, and SMA-LED, but there is no effective treatment for such condition. Our case enriches the DYNC1H1 gene mutation spectrum and provides an important basis for clinical diagnosis and treatment and genetic counseling.
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Affiliation(s)
- Feng-Juan Ding
- Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital, Jinan 250001, Shandong Province, China
| | - Gui-Zhen Lyu
- AmCare Genomics lab (Guangzhou), Guangzhou 510300, Guangdong Province, China
| | - Victor Wei Zhang
- AmCare Genomics lab (Guangzhou), Guangzhou 510300, Guangdong Province, China
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX 77001, United States
| | - Hua Jin
- Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital, Jinan 250001, Shandong Province, China
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de Aguiar Coelho Silva Madeiro B, Peeters K, Santos de Lima EL, Amor‐Barris S, De Vriendt E, Jordanova A, Cartaxo Muniz MT, da Cunha Correia C. HINT1 founder mutation causing axonal neuropathy with neuromyotonia in South America: A case report. Mol Genet Genomic Med 2021; 9:e1783. [PMID: 34562060 PMCID: PMC8580089 DOI: 10.1002/mgg3.1783] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/18/2021] [Accepted: 08/02/2021] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Recessive loss-of-function mutations in HINT1 are associated with predominantly motor axonal peripheral neuropathy with neuromyotonia. Twenty-four distinct pathogenic variants are reported all over the world, including four confirmed founder variations in Europe and Asia. The majority of patients carry the ancient Slavic founder variant c.110G>C (p.Arg37Pro) that shows a distribution gradient from east to west throughout Europe. METHODS We report a case of HINT1 neuropathy in South America, identified by massive parallel sequencing of a neuropathy gene panel. To investigate the origin of the variant, we performed haplotyping analysis. RESULTS A Brazilian adolescent presented with recessive axonal motor neuropathy with asymmetric onset and fasciculations. Neuromyotonia was found on needle electromyography. His parents were not consanguineous and had no European ancestry. The patient carried biallelic pathogenic p.Arg37Pro alterations in the first exon of HINT1. Both alleles were identical by descent and originated from the same ancestral founder allele as reported in Europe. CONCLUSION Our findings expand the geographic distribution of HINT1 neuropathy to South America, where we describe a recognized founder variant in a Brazilian adolescent with no apparent European ancestry. We confirm the association of the hallmark sign of neuromyotonia with the disease.
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Affiliation(s)
| | | | | | | | - Els De Vriendt
- VIB‐UAntwerp Center for Molecular NeurologyAntwerpBelgium
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11
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Kara B, Gül S, Güneş AS, Mülayim S, Yeşil G. A Novel Mutation of HINT1 Gene in an Adolescent Female with Axonal Neuropathy and Neuromyotonia. JOURNAL OF PEDIATRIC NEUROLOGY 2021. [DOI: 10.1055/s-0040-1710511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Abstract
HINT1 gene mutations cause an axonal neuropathy with some specific findings including presence of neuromyotonia, autosomal recessive inheritance, onset in the first decade, and primary motor involvement. In this case report, we described an 18-year-old female patient who presented to the clinic with gait instability and muscle stiffness. A homozygous novel c.180_181delAT (p.Ser61Profs*8) variant in the HINT1 gene was found by clinical exome analysis. Parents were heterozygous for the same variant. The patient was diagnosed with autosomal recessive axonal neuropathy with neuromyotonia. The presence of neuromyotonia must be evaluated in patients with hereditary axonal neuropathies as this can help the diagnosis prior to genetic testing.
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Affiliation(s)
- Bülent Kara
- Division of Child Neurology, Department of Pediatrics, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Sedat Gül
- Department of Pediatrics, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Ayfer Sakarya Güneş
- Division of Child Neurology, Department of Pediatrics, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Serap Mülayim
- Department of Neurology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Gözde Yeşil
- Department of Medical Genetics, Bezmialem Vakıf University, Istanbul, Turkey
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12
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Amor-Barris S, Høyer H, Brauteset LV, De Vriendt E, Strand L, Jordanova A, Braathen GJ, Peeters K. HINT1 neuropathy in Norway: clinical, genetic and functional profiling. Orphanet J Rare Dis 2021; 16:116. [PMID: 33663550 PMCID: PMC7934415 DOI: 10.1186/s13023-021-01746-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 02/16/2021] [Indexed: 12/30/2022] Open
Abstract
Background Autosomal recessive axonal neuropathy with neuromyotonia has been linked to loss of functional HINT1. The disease is particularly prevalent in Central and South-East Europe, Turkey and Russia due to the high carrier frequency of the c.110G > C (p.Arg37Pro) founder variant. Results In a cohort of 748 Norwegian patients with suspected peripheral neuropathy, we identified two seemingly unrelated individuals, compound heterozygous for a new variant (c.284G > A, p.Arg95Gln) and the most common pathogenic founder variant (c.110G > C, p.Arg37Pro) in the HINT1 gene. Probands presented with motor greater than sensory neuropathy of various onset, accompanied by muscle stiffness and cramps in the limbs. Furthermore, they displayed non-classical symptoms, including pain in the extremities and signs of central nervous system involvement. Haplotype analysis in both patients revealed a common chromosomal background for p.Arg95Gln; moreover, the variant was identified in Swedish carriers. Functional characterization in HINT1-knockout and patient-derived cellular models, and in HNT1-knockout yeast, suggested that the new variant is deleterious for the function of HINT1 and provided mechanistic insights allowing patient stratification for future treatment strategies. Conclusion Our findings broaden the genetic epidemiology of HINT1-neuropathy and have implications for molecular diagnostics of inherited peripheral neuropathies in Scandinavia.
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Affiliation(s)
- Silvia Amor-Barris
- Molecular Neurogenomics Group, VIB-UAntwerp Center for Molecular Neurology, University of Antwerp, Unversiteitsplein 1, Building V, 2610, Antwerpen, Belgium.,Molecular Neurogenomics Group, Department of Biomedical Sciences, University of Antwerp, Antwerpen, Belgium
| | - Helle Høyer
- Department of Medical Genetics, Telemark Hospital Trust, Sykehuset Telemark, Postboks 2900 Kjørbekk, 3710, Skien, Norway
| | - Lin V Brauteset
- Division Elverum-Hamar, Department of Children and Youth, Innlandet Hospital Trust, Elverum, Norway
| | - Els De Vriendt
- Molecular Neurogenomics Group, VIB-UAntwerp Center for Molecular Neurology, University of Antwerp, Unversiteitsplein 1, Building V, 2610, Antwerpen, Belgium.,Molecular Neurogenomics Group, Department of Biomedical Sciences, University of Antwerp, Antwerpen, Belgium
| | - Linda Strand
- Department of Medical Genetics, Telemark Hospital Trust, Sykehuset Telemark, Postboks 2900 Kjørbekk, 3710, Skien, Norway
| | - Albena Jordanova
- Molecular Neurogenomics Group, VIB-UAntwerp Center for Molecular Neurology, University of Antwerp, Unversiteitsplein 1, Building V, 2610, Antwerpen, Belgium.,Molecular Medicine Center, Department of Medical Chemistry and Biochemistry, Medical University-Sofia, Sofia, Bulgaria
| | - Geir J Braathen
- Department of Medical Genetics, Telemark Hospital Trust, Sykehuset Telemark, Postboks 2900 Kjørbekk, 3710, Skien, Norway.
| | - Kristien Peeters
- Molecular Neurogenomics Group, VIB-UAntwerp Center for Molecular Neurology, University of Antwerp, Unversiteitsplein 1, Building V, 2610, Antwerpen, Belgium. .,Molecular Neurogenomics Group, Department of Biomedical Sciences, University of Antwerp, Antwerpen, Belgium.
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13
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Beijer D, Baets J. The expanding genetic landscape of hereditary motor neuropathies. Brain 2021; 143:3540-3563. [PMID: 33210134 DOI: 10.1093/brain/awaa311] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/15/2020] [Accepted: 07/27/2020] [Indexed: 12/12/2022] Open
Abstract
Hereditary motor neuropathies are clinically and genetically diverse disorders characterized by length-dependent axonal degeneration of lower motor neurons. Although currently as many as 26 causal genes are known, there is considerable missing heritability compared to other inherited neuropathies such as Charcot-Marie-Tooth disease. Intriguingly, this genetic landscape spans a discrete number of key biological processes within the peripheral nerve. Also, in terms of underlying pathophysiology, hereditary motor neuropathies show striking overlap with several other neuromuscular and neurological disorders. In this review, we provide a current overview of the genetic spectrum of hereditary motor neuropathies highlighting recent reports of novel genes and mutations or recent discoveries in the underlying disease mechanisms. In addition, we link hereditary motor neuropathies with various related disorders by addressing the main affected pathways of disease divided into five major processes: axonal transport, tRNA aminoacylation, RNA metabolism and DNA integrity, ion channels and transporters and endoplasmic reticulum.
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Affiliation(s)
- Danique Beijer
- Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium.,Laboratory of Neuromuscular Pathology, Institute Born-Bunge, University of Antwerp, Belgium
| | - Jonathan Baets
- Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium.,Laboratory of Neuromuscular Pathology, Institute Born-Bunge, University of Antwerp, Belgium.,Neuromuscular Reference Centre, Department of Neurology, Antwerp University Hospital, Belgium
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14
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Abstract
Objectives: Generally, neuropathies of peripheral nerves are a frequent condition (prevalence 2–3%) and most frequently due to alcoholism, diabetes, renal insufficiency, malignancy, toxins, or drugs. However, the vast majority of neuropathies has orphan status. This review focuses on the etiology, frequency, diagnosis, and treatment of orphan neuropathies. Methods: Literature review Results: Rareness of diseases is not uniformly defined but in the US an orphan disease is diagnosed if the prevalence is <1:200000, in Europe if <5:10000. Most acquired and hereditary neuropathies are orphan diseases. Often the causative variant has been reported only in a single patient or family, particularly the ones that are newly detected (e.g. SEPT9, SORD). Among the complex neuropathies (hereditary multisystem disorders with concomitant neuropathies) orphan forms have been reported among mitochondrial disorders (e.g. NARP, MNGIE, SANDO), spinocerebellar ataxias (e.g. TMEM240), hereditary spastic paraplegias (e.g UBAP1), lysosomal storage disease (e.g. Schindler disease), peroxisomal disorders, porphyrias, and other types (e.g. giant axonal neuropathy, Tangier disease). Orphan acquired neuropathies include the metabolic neuropathies (e.g. vitamin-B1, folic acid), toxic neuropathies (e.g. copper, lithium, lead, arsenic, thallium, mercury), infectious neuropathies, immune-mediated (e.g. Bruns-Garland syndrome), and neoplastic/paraneoplastic neuropathies. Conclusions: Though orphan neuropathies are rare per definition they constitute the majority of neuropathies and should be considered as some of them are easy to identify and potentially treatable, as clarification of the underlying cause may contribute to the knowledge about etiology and pathophysiology of these conditions, and as the true prevalence may become obvious only if all ever diagnosed cases are reported.
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Affiliation(s)
| | | | - Julia Wanschitz
- Department of Neurology, Medical University, Innsbruck, Austria
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15
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Yang N, Ma Y, Yao H, Chang Q, Zhang V, Liang Z, Cai X. Novel biallelic variants in COL7A1 cause recessive dystrophic epidermolysis bullosa. Mol Genet Genomic Med 2020; 8:e1347. [PMID: 32537942 PMCID: PMC7434731 DOI: 10.1002/mgg3.1347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 12/17/2022] Open
Abstract
Background Autosomal recessive dystrophic epidermolysis bullosa (RDEB) is an incurable and severe inherited skin disorder characterized by recurrent blistering at the sublamina densa beneath the cutaneous basement membrane. It is caused by biallelic loss‐of‐function mutation in the gene encoding type VII collagen (COL7A1). This study aimed to identify the causative variants of a Chinese RDEB patient and further provide prenatal diagnosis for the ongoing risk pregnancy of the proband's mother. Methods Clinical exome sequencing (CES) has been performed and an in‐house pipeline was used to conduct a phenotype‐driven data analysis. A minigene assay was used to verify the pathogenicity of a novel splice site variant in the COL7A1. Results Here we report two compound heterozygous variants in COL7A1, c.3867delT (p.G1290Efs*35) and c.5532+4_5532+5delAG, identified in a RDEB patient by CES. The minigene assay confirmed that thec.5532+4_5532+5delAGchange was a noncanonic splice site variant leading to in an in‐frame deletion of exon 64. Prenatal diagnosis indicated that the present pregnancy of the patient's mother was not affected. Conclusion Our study expands the mutation spectrum of COL7A1 and demonstrated that CES and minigene assays were efficient tools for RDEB molecular diagnoses.
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Affiliation(s)
- Neng Yang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Laboratory of Molecular Developmental Biology, School of Life Sciences, Southwest University, Chongqing, China.,Department of Gynecology & Obstetrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Yongyi Ma
- Department of Gynecology & Obstetrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Hong Yao
- Department of Gynecology & Obstetrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Qing Chang
- Department of Gynecology & Obstetrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Victor Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, USA.,AmCare Genomics Lab, Guangzhou, China
| | - Zhiqing Liang
- Department of Gynecology & Obstetrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xiongwei Cai
- Department of Gynecology & Obstetrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
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16
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Varderidou-Minasian S, Hinz L, Hagemans D, Posthuma D, Altelaar M, Heine VM. Quantitative proteomic analysis of Rett iPSC-derived neuronal progenitors. Mol Autism 2020; 11:38. [PMID: 32460858 PMCID: PMC7251722 DOI: 10.1186/s13229-020-00344-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/04/2020] [Indexed: 12/12/2022] Open
Abstract
Background Rett syndrome (RTT) is a progressive neurodevelopmental disease that is characterized by abnormalities in cognitive, social, and motor skills. RTT is often caused by mutations in the X-linked gene encoding methyl-CpG binding protein 2 (MeCP2). The mechanism by which impaired MeCP2 induces the pathological abnormalities in the brain is not understood. Both patients and mouse models have shown abnormalities at molecular and cellular level before typical RTT-associated symptoms appear. This implies that underlying mechanisms are already affected during neurodevelopmental stages. Methods To understand the molecular mechanisms involved in disease onset, we used an RTT patient induced pluripotent stem cell (iPSC)-based model with isogenic controls and performed time-series of proteomic analysis using in-depth high-resolution quantitative mass spectrometry during early stages of neuronal development. Results We provide mass spectrometry-based quantitative proteomic data, depth of about 7000 proteins, at neuronal progenitor developmental stages of RTT patient cells and isogenic controls. Our data gives evidence of proteomic alteration at early neurodevelopmental stages, suggesting alterations long before the phase that symptoms of RTT syndrome become apparent. Significant changes are associated with the GO enrichment analysis in biological processes cell-cell adhesion, actin cytoskeleton organization, neuronal stem cell population maintenance, and pituitary gland development, next to protein changes previously associated with RTT, i.e., dendrite morphology and synaptic deficits. Differential expression increased from early to late neural stem cell phases, although proteins involved in immunity, metabolic processes, and calcium signaling were affected throughout all stages analyzed. Limitations The limitation of our study is the number of RTT patients analyzed. As the aim of our study was to investigate a large number of proteins, only one patient was considered, of which 3 different RTT iPSC clones and 3 isogenic control iPSC clones were included. Even though this approach allowed the study of mutation-induced alterations due to the usage of isogenic controls, results should be validated on different RTT patients to suggest common disease mechanisms. Conclusions During early neuronal differentiation, there are consistent and time-point specific proteomic alterations in RTT patient cells carrying exons 3–4 deletion in MECP2. We found changes in proteins involved in pathway associated with RTT phenotypes, including dendrite morphology and synaptogenesis. Our results provide a valuable resource of proteins and pathways for follow-up studies, investigating common mechanisms involved during early disease stages of RTT syndrome.
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Affiliation(s)
- Suzy Varderidou-Minasian
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584, CH, Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584, CH, Utrecht, The Netherlands
| | - Lisa Hinz
- Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Dominique Hagemans
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584, CH, Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584, CH, Utrecht, The Netherlands
| | - Danielle Posthuma
- Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Child and Youth Psychiatry, Emma Children's Hospital, Amsterdam UMC, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Maarten Altelaar
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584, CH, Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584, CH, Utrecht, The Netherlands
| | - Vivi M Heine
- Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands. .,Child and Youth Psychiatry, Emma Children's Hospital, Amsterdam UMC, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
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17
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Rossi S, Perna A, Modoni A, Bertini E, Riso V, Nicoletti TF, Silvestri G. Response to "Autosomal recessive axonal neuropathy caused by HINT1 mutation: New association of a psychiatric disorder to the neurological phenotype". Neuromuscul Disord 2020; 30:265-266. [PMID: 32171572 DOI: 10.1016/j.nmd.2020.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 01/22/2020] [Indexed: 10/25/2022]
Affiliation(s)
- Salvatore Rossi
- Istituto di Neurologia, Università Cattolica del Sacro Cuore - sede di Roma, Largo F. Vito 1, Rome, Italy.
| | - Alessia Perna
- Istituto di Neurologia, Università Cattolica del Sacro Cuore - sede di Roma, Largo F. Vito 1, Rome, Italy
| | - Anna Modoni
- Dipartimento Scienze dell'invecchiamento, neurologiche, ortopediche e della testa-collo, Area neuroscienze, Unità Operativa Complessa Neurologia, Largo A. Gemelli 8, Rome, Italy
| | - Enrico Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, Rome, Italy
| | - Vittorio Riso
- Istituto di Neurologia, Università Cattolica del Sacro Cuore - sede di Roma, Largo F. Vito 1, Rome, Italy
| | - Tommaso Filippo Nicoletti
- Istituto di Neurologia, Università Cattolica del Sacro Cuore - sede di Roma, Largo F. Vito 1, Rome, Italy
| | - Gabriella Silvestri
- Istituto di Neurologia, Università Cattolica del Sacro Cuore - sede di Roma, Largo F. Vito 1, Rome, Italy; Dipartimento Scienze dell'invecchiamento, neurologiche, ortopediche e della testa-collo, Area neuroscienze, Unità Operativa Complessa Neurologia, Largo A. Gemelli 8, Rome, Italy
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18
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Shchagina OA, Milovidova TB, Murtazina AF, Rudenskaya GE, Nikitin SS, Dadali EL, Polyakov AV. HINT1 gene pathogenic variants: the most common cause of recessive hereditary motor and sensory neuropathies in Russian patients. Mol Biol Rep 2019; 47:1331-1337. [PMID: 31848916 DOI: 10.1007/s11033-019-05238-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 12/11/2019] [Indexed: 11/26/2022]
Abstract
Pathogenic variants in the HINT1 gene lead to hereditary axonopathy with neuromyotonia. However, many studies show that neuromyotonia may remain undiagnosed, while axonopathy is the major clinical finding. The most common cause of neuromyotonia and axonopathy, especially in patients of Slavic origin, is a c.110G>C (p.Arg37Pro) pathogenic variant in homozygous or compound heterozygous state. In this study, we analyzed a peripheral neuropathy caused by pathogenic variants in the HINT1 gene and evaluated its contribution to the hereditary neuropathy structure. The studied group included 1596 non-related families diagnosed with hereditary motor and sensory neuropathy (HMSN). The results show that HINT1 gene pathogenic variants make a significant contribution to the hereditary neuropathy epidemiology in Russian patients. They account for at least 1.9% of all HMSN cases and 9% of axonopathy cases. The most common HINT1 pathogenic variant in Russian patients is the c.110G>C (p.Arg37Pro) substitution. Its allelic frequency is 0.2% (95% CI 0.19-0.21%), carrier frequency is 1 in 250 people in Russian Federation, and the estimated disease incidence is 1 in 234,000 individuals. It was determined that the cause of this pathogenic variant's prevalence is the founder effect.
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Affiliation(s)
- O A Shchagina
- Laboratory of DNA Diagnostics, Laboratory of Molecular Genetic Diagnosis №1 of Research Centre for Medical Genetics, 1 Moskvorechie St., Moscow, Russia, 115522
| | - T B Milovidova
- Laboratory of DNA Diagnostics of Research Centre for Medical Genetics, 1 Moskvorechie St, Moscow, Russia, 115522
| | - A F Murtazina
- Research Centre for Medical Genetics, 1 Moskvorechie St., Moscow, Russia, 115522.
| | - G E Rudenskaya
- Scientific and Medical Department of Research Centre for Medical Genetics, 1 Moskvorechie St., Moscow, Russia, 115522
| | - S S Nikitin
- Association of Neuromuscular Disorders Specialists, Build. 2, 17 Krzhizhanovskogo St., Moscow, Russia, 117258
| | - E L Dadali
- Scientific and Medical Department of Research Centre for Medical Genetics, 1 Moskvorechie St., Moscow, Russia, 115522
| | - A V Polyakov
- Laboratory of DNA Diagnostics of Research Centre for Medical Genetics, 1 Moskvorechie St, Moscow, Russia, 115522
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19
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Whole exome sequencing reveals a broader variant spectrum of Charcot-Marie-Tooth disease type 2. Neurogenetics 2019; 21:79-86. [PMID: 31832804 DOI: 10.1007/s10048-019-00591-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 09/12/2019] [Indexed: 12/21/2022]
Abstract
Charcot-Marie-Tooth disease type 2 (CMT2) is a clinically and genetically heterogeneous inherited neuropathy. Although new causative and disease-associated genes have been identified for CMT2 in recent years, molecular diagnoses are still lacking for a majority of patients. We here studied a cohort of 35 CMT2 patients of Chinese descent, using whole exome sequencing to investigate gene mutations and then explored relationships among genotypes, clinical features, and mitochondrial DNA levels in blood as assessed by droplet digital PCR. We identified pathogenic variants in 57% of CMT2 patients. The most common genetic causes in the cohort were MFN2 mutations. Two patients with typical CMT phenotype and neuromyotonia were detected to harbor compound heterozygous variations in the HINT1 gene. In conclusion, our work supports that the molecular diagnostic rate of CMT2 patients can be increased via whole exome sequencing, and our data suggest that assessment of possible HINT1 mutations should be undertaken for CMT2 patients with neuromyotonia.
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20
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El-Kenawy A, Benarba B, Neves AF, de Araujo TG, Tan BL, Gouri A. Gene surgery: Potential applications for human diseases. EXCLI JOURNAL 2019; 18:908-930. [PMID: 31762718 PMCID: PMC6868916 DOI: 10.17179/excli2019-1833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/09/2019] [Indexed: 12/13/2022]
Abstract
Gene therapy became in last decade a new emerging therapeutic era showing promising results against different diseases such as cancer, cardiovascular diseases, diabetes, and neurological disorders. Recently, the genome editing technique for eukaryotic cells called CRISPR-Cas (Clustered Regulatory Interspaced Short Palindromic Repeats) has enriched the field of gene surgery with enhanced applications. In the present review, we summarized the different applications of gene surgery for treating human diseases such as cancer, diabetes, nervous, and cardiovascular diseases, besides the molecular mechanisms involved in these important effects. Several studies support the important therapeutic applications of gene surgery in a large number of health disorders and diseases including β-thalassemia, cancer, immunodeficiencies, diabetes, and neurological disorders. In diabetes, gene surgery was shown to be effective in type 1 diabetes by triggering different signaling pathways. Furthermore, gene surgery, especially that using CRISPR-Cas possessed important application on diagnosis, screening and treatment of several cancers such as lung, liver, pancreatic and colorectal cancer. Nevertheless, gene surgery still presents some limitations such as the design difficulties and costs regarding ZFNs (Zinc Finger Nucleases) and TALENs (Transcription Activator-Like Effector Nucleases) use, off-target effects, low transfection efficiency, in vivo delivery-safety and ethical issues.
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Affiliation(s)
- Ayman El-Kenawy
- Department of Pathology, College of Medicine, Taif University, Saudi Arabia
- Department of Molecular Biology, GEBRI, University of Sadat City, P.O. Box 79, Sadat City, Egypt
| | - Bachir Benarba
- Laboratory Research on Biological Systems and Geomatics, Faculty of Nature and Life Sciences, University of Mascara, Algeria
| | - Adriana Freitas Neves
- Institute of Biotechnology, Molecular Biology Laboratory, Universidade Federal de Goias, Catalao, Brazil
| | - Thaise Gonçalves de Araujo
- Laboratory of Genetics and Biotechnology, Institute of Biotechnology, Federal University of Uberlandia, Patos de Minas, MG, Brazil
| | - Bee Ling Tan
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Adel Gouri
- Laboratory of Medical Biochemistry, Faculty of Medicine, University of Annaba, Algeria
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21
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Cortés-Montero E, Rodríguez-Muñoz M, Sánchez-Blázquez P, Garzón J. The Axonal Motor Neuropathy-Related HINT1 Protein Is a Zinc- and Calmodulin-Regulated Cysteine SUMO Protease. Antioxid Redox Signal 2019; 31:503-520. [PMID: 31088288 PMCID: PMC6648240 DOI: 10.1089/ars.2019.7724] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aims: Histidine triad nucleotide-binding protein 1 (HINT1) exhibits proapoptotic and tumor-suppressive activity. HINT1 binds to transcription factors such as teneurin1 and to the regulator of G protein signaling 17 (RGS) (Z2) protein, which incorporates the small ubiquitin-like modifier (SUMO), and is implicated in several types of cancer. HINT1 interacts with proteins such as PKCγ and Raf-1 through zinc ions provided by the cysteine-rich domain of RGSZ2 and the coupled neural nitric oxide synthase (nNOS). Recently, a series of HINT1 mutants have been reported to cause human autosomal recessive axonal neuropathy with neuromyotonia (ARAN-NM). However, the specific alteration in the function of HINT1 induced by these mutants remains to be elucidated. Because sumoylation modifies protein association and transcriptional regulation, we investigated whether HINT1 exhibits zinc- and redox-regulated sumoylase activity, which may be altered in those mutants. Results: HINT1 exhibits cysteine protease activity to remove SUMO from a variety of signaling proteins. HINT1 sumoylase activity is blocked by zinc, and it is released by nitric oxide or calcium-activated calmodulin (CaM). HINT1 contains a SUMO-interacting motif (110-116 HIHLHVL) and the catalytic triad Cys84-Asp87-His114 in the C-terminal region. Thus, zinc probably provided by the RGSZ2-nNOS complex may bind to Cys84 to block HINT1 isopeptidase activity. Innovation: To date, HINT1 is the only sumoylase that is regulated by two alternate pathways, redox- and calcium-activated CaM. Conclusion: The 15 human HINT1 mutants reported to cause ARAN-NM exhibited altered sumoylase activity, which may contribute to the onset of this human motor disease.
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Affiliation(s)
- Elsa Cortés-Montero
- Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - María Rodríguez-Muñoz
- Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Pilar Sánchez-Blázquez
- Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Javier Garzón
- Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
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