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Wang HP, Wong LC, Hsu CJ, Hu SC, Chu YJ, Lee WT. Eye motor manifestations in children with neurometabolic disorders. J Formos Med Assoc 2021; 121:736-748. [PMID: 34561118 DOI: 10.1016/j.jfma.2021.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/11/2021] [Accepted: 09/05/2021] [Indexed: 01/15/2023] Open
Abstract
Neurometabolic diseases are complex group of rare neurogenetic disorders, which are difficult to diagnose. Patients may have toxic metabolite accumulation, inadequate energy supply, or neurotransmitter deficiency, resulting in a variety of clinical manifestations and severity with enzyme activity or transporter function defects. Multiple organ involvement is frequently seen, among which neurological symptoms and signs are one of the most encountered problems. Ocular motor problems deserve special attention for it occurs in some inborn error of metabolism. Furthermore, some are early signs or characteristic findings of certain diseases, such as the gaze palsy in Niemann-Pick disease type C and Gaucher disease or oculogyric crisis in neurotransmitter diseases. Early recognition and intervention are important for better prognosis in treatable neurometabolic disorders. In addition, ways to evaluate and describe eye movement problems also help to demonstrate the severity or clinical progression for those diagnosed with certain neurometabolic diseases. However, the complexity of eye movement and ocular motor control renders our clinical observation, recording and even anatomic localization of abnormal eye movements. Clinicians are more likely to detect early signs and unravel problems by gaining awareness of abnormal eye movement. This study amied to approach neurometabolic diseases in children via eye motor manifestations.
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Affiliation(s)
- Hsin-Pei Wang
- Department of Pediatrics, National Taiwan University Hospital YunLin branch, Yun-Lin, Taiwan
| | - Lee-Chin Wong
- Department of Pediatrics, Cathy General Hospital, Taipei, Taiwan
| | - Chia-Jui Hsu
- Department of Pediatrics, National Taiwan University Hospital Hsinchu branch, Hsinchu, Taiwan
| | - Su-Ching Hu
- Department of Pediatrics, Cathy General Hospital, Taipei, Taiwan
| | - Yen-Ju Chu
- Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wang-Tso Lee
- Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan; Graduate Institute of Brain and Mind Sciences, National Taiwan University College of Medicine, Taipei, Taiwan.
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Wang J, Wang J, Han X, Liu Z, Ma Y, Chen G, Zhang H, Sun D, Xu R, Liu Y, Zhang Y, Wen Y, Bao X, Chen Q, Fang F. Report of the Largest Chinese Cohort With SLC19A3 Gene Defect and Literature Review. Front Genet 2021; 12:683255. [PMID: 34276785 PMCID: PMC8281341 DOI: 10.3389/fgene.2021.683255] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/07/2021] [Indexed: 11/13/2022] Open
Abstract
Thiamine metabolism dysfunction syndrome 2 (THMD2) is a rare metabolic disorder caused by SLC19A3 mutations, inherited in autosomal recessive pattern. As a treatable disease, early diagnosis and therapy with vitamin supplementation is important to improve the prognosis. So far, the reported cases were mainly from Saudi Arab regions, and presented with relatively simple clinical course because of the hot spot mutation (T422A). Rare Chinese cases were described until now. In this study, we investigated 18 Chinese THMD2 patients with variable phenotypes, and identified 23 novel SLC19A3 mutations, which expanded the genetic and clinical spectrum of the disorder. Meanwhile, we reviewed all 146 reported patients from different countries. Approximately 2/3 of patients presented with classical BTBGD, while 1/3 of patients manifested as much earlier onset and poor prognosis, including infantile Leigh-like syndrome, infantile spasms, neonatal lactic acidosis and infantile BTBGD. Literature review showed that elevated lactate in blood and CSF, as well as abnormal OXPHOS activities of muscle or skin usually correlated with infantile phenotypes, which indicated poor outcome. Brainstem involvement on MRI was more common in deceased cases. Thiamine supplementation is indispensable in the treatment of THMD2, whereas combination of biotin and thiamine is not superior to thiamine alone. But biotin supplementation does work in some patients. Genotypic-phenotypic correlation remains unclear which needs further investigation, and biallelic truncated mutations usually led to more severe phenotype.
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Affiliation(s)
- Jiaping Wang
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Junling Wang
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Xiaodi Han
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Zhimei Liu
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Yanli Ma
- Department of Neurology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou, China
| | - Guohong Chen
- Department of Neurology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou, China
| | - Haoya Zhang
- Department of Neurology, Wuhan Children's Hospital, Wuhan, China
| | - Dan Sun
- Department of Neurology, Wuhan Children's Hospital, Wuhan, China
| | - Ruifeng Xu
- Department of Neurology, Gansu Maternal and Children's Hospital, Lanzhou, China
| | - Yi Liu
- Jinan Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Jinan, China
| | - Yuqin Zhang
- Department of Neurology, Tianjin Children's Hospital, Tianjin, China
| | - Yongxin Wen
- Department of Pediatric Neurology, Peking University First Hospital, Beijing, China
| | - Xinhua Bao
- Department of Pediatric Neurology, Peking University First Hospital, Beijing, China
| | - Qian Chen
- Department of Neurology, Capital Institute of Pediatrics, Beijing, China
| | - Fang Fang
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
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Koens LH, Tijssen MAJ, Lange F, Wolffenbuttel BHR, Rufa A, Zee DS, de Koning TJ. Eye movement disorders and neurological symptoms in late-onset inborn errors of metabolism. Mov Disord 2018; 33:1844-1856. [PMID: 30485556 PMCID: PMC6587951 DOI: 10.1002/mds.27484] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 08/03/2018] [Accepted: 08/06/2018] [Indexed: 11/06/2022] Open
Abstract
Inborn errors of metabolism in adults are still largely unexplored. Despite the fact that adult‐onset phenotypes have been known for many years, little attention is given to these disorders in neurological practice. The adult‐onset presentation differs from childhood‐onset phenotypes, often leading to considerable diagnostic delay. The identification of these patients at the earliest stage of disease is important, given that early treatment may prevent or lessen further brain damage. Neurological and psychiatric symptoms occur more frequently in adult forms. Abnormalities of eye movements are also common and can be the presenting sign. Eye movement disorders can be classified as central or peripheral. Central forms are frequently observed in lysosomal storage disorders, whereas peripheral forms are a key feature of mitochondrial disease. Furthermore, oculogyric crisis is an important feature in disorders affecting dopamine syntheses or transport. Ocular motor disorders are often not reported by the patient, and abnormalities can be easily overlooked in a general examination. In adults with unexplained psychiatric and neurological symptoms, a special focus on examination of eye movements can serve as a relatively simple clinical tool to detect a metabolic disorder. Eye movements can be easily quantified and analyzed with video‐oculography, making them a valuable biomarker for following the natural course of disease or the response to therapies. Here, we review, for the first time, eye movement disorders that can occur in inborn errors of metabolism, with a focus on late‐onset forms. We provide a step‐by‐step overview that will help clinicians to examine and interpret eye movement disorders. © 2018 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Lisette H Koens
- University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, The Netherlands
| | - Marina A J Tijssen
- University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, The Netherlands
| | - Fiete Lange
- University of Groningen, University Medical Center Groningen, Department of Clinical Neurophysiology, Groningen, The Netherlands
| | - Bruce H R Wolffenbuttel
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Alessandra Rufa
- Department of Medicine Surgery and Neurosciences, University of Siena, Eye tracking and Visual Application Lab (EVA Lab)-Neurology and Neurometabolic Unit, Siena, Italy
| | - David S Zee
- Department of Neuroscience, Department of Ophthalmology, The Johns Hopkins University, The Johns Hopkins Hospital, Department of Neurology, Department of Otolaryngology-Head and Neck Surgery, Baltimore, Maryland, USA
| | - Tom J de Koning
- University of Groningen, Division of Metabolic Diseases, University Medical Center Groningen, Groningen, The Netherlands.,University of Groningen, Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
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