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Mao SJ, Chen QQ, Dai YL, Dong GP, Zou CC. The diagnosis and management of mucopolysaccharidosis type II. Ital J Pediatr 2024; 50:207. [PMID: 39380047 PMCID: PMC11463001 DOI: 10.1186/s13052-024-01769-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 09/22/2024] [Indexed: 10/10/2024] Open
Abstract
Mucopolysaccharidosis type II (MPS II) is a rare X-linked recessive inherited lysosomal storage disease. With pathogenic variants of the IDS gene, the activity of iduronate-2-sulfatase (IDS) is reduced or lost, causing the inability to degrade glycosaminoglycans (GAGs) in cells and influencing cell function, eventually resulting in multisystemic manifestations, such as a coarse face, dysostosis multiplex, recurrent respiratory tract infections, and hernias. Diagnosing MPS II requires a combination of clinical manifestations, imaging examinations, urinary GAGs screening, enzyme activity, and genetic testing. Currently, symptomatic treatment is the main therapeutic approach. Owing to economic and drug availability issues, only a minority of patients opt for enzyme replacement therapy or hematopoietic stem cell transplantation. The limited awareness of the disease, the lack of widespread detection technology, and uneven economic development contribute to the high rates of misdiagnosis and missed diagnosis in China.
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Affiliation(s)
- Shao-Jia Mao
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Qing-Qing Chen
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yang-Li Dai
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Guan-Ping Dong
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Chao-Chun Zou
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China.
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Enokizono M, Kurokawa R, Yagishita A, Nakata Y, Koyasu S, Nihira H, Kuwashima S, Aida N, Kono T, Mori H. Clinical and neuroimaging review of monogenic cerebral small vessel disease from the prenatal to adolescent developmental stage. Jpn J Radiol 2024; 42:109-125. [PMID: 37847489 PMCID: PMC10810974 DOI: 10.1007/s11604-023-01493-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 09/15/2023] [Indexed: 10/18/2023]
Abstract
Cerebral small vessel disease (cSVD) refers to a group of pathological processes with various etiologies affecting the small vessels of the brain. Most cases are sporadic, with age-related and hypertension-related sSVD and cerebral amyloid angiopathy being the most prevalent forms. Monogenic cSVD accounts for up to 5% of causes of stroke. Several causative genes have been identified. Sporadic cSVD has been widely studied whereas monogenic cSVD is still poorly characterized and understood. The majority of cases of both the sporadic and monogenic types, including cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), typically have their onset in adulthood. Types of cSVD with infantile and childhood onset are rare, and their diagnosis is often challenging. The present review discusses the clinical and neuroimaging findings of monogenic cSVD from the prenatal to adolescent period of development. Early diagnosis is crucial to enabling timely interventions and family counseling.
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Affiliation(s)
- Mikako Enokizono
- Department of Radiology, Tokyo Metropolitan Children's Medical Center, 2-8-29 Musashidai, Fuchu, Tokyo, 183-8561, Japan.
| | - Ryo Kurokawa
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Akira Yagishita
- Department of Neuroradiology, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
| | - Yasuhiro Nakata
- Department of Neuroradiology, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
| | - Sho Koyasu
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Hiroshi Nihira
- Department of Pediatrics, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Shigeko Kuwashima
- Department of Radiology, Dokkyo Medical University, Shimotsuga-gun, Tochigi, Japan
| | - Noriko Aida
- Department of Radiology, Kanagawa Children's Medical Center, Yokohama, Kanagawa, Japan
| | - Tatsuo Kono
- Department of Radiology, Tokyo Metropolitan Children's Medical Center, 2-8-29 Musashidai, Fuchu, Tokyo, 183-8561, Japan
| | - Harushi Mori
- Department of Radiology, School of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Kimura M, Azuma Y, Taguchi S, Takagi M, Mori H, Shimomura Y, Niwa JI, Doyu M, Okumura A. Subcortical infarction in a young adult with Hunter syndrome. Brain Dev 2022; 44:343-346. [PMID: 35125232 DOI: 10.1016/j.braindev.2022.01.003] [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: 09/20/2021] [Revised: 12/16/2021] [Accepted: 01/16/2022] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Hunter syndrome (mucopolysaccharidosis type II, MPS II) is an X-linked lysosomal storage disease caused by deficiency of iduronate-2-sulfatase. Recently, stroke caused by embolization with Hunter syndrome has been reported. Here, we report the case of a 23-year-old Japanese man with Hunter syndrome who developed subcortical infarction by the mechanism similar to branch atheromatous disease (BAD). CASE PRESENTATION He had been treated with idursulfase supplementation. He presented with left-sided weakness and conjugate eye deviation to the right, and was diagnosed with branch atheromatous disease affecting the right corona radiata, based on MRI findings. The patient was treated with argatroban and aspirin. Magnetic resonance angiography demonstrated no evidence of luminal narrowing of the cerebral arteries. T1-sampling perfection with application-optimized contrasts by using different flip angle evolutions (SPACE) imaging revealed thickened middle cerebral artery. The patient had markedly low flow-mediated vasodilation, suggesting impaired vasodilation in response to nitric monoxide. CONCLUSION The arterial wall thickening and impaired vasodilation in the cerebral arteries related to subcortical infarction. We should clarify the mechanism of cerebral infarction in Hunter syndrome patients.
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Affiliation(s)
- Motoya Kimura
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan; Department of Neurology, Aichi Medical University, Nagakute, Japan.
| | - Yoshiteru Azuma
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan
| | - Soutarou Taguchi
- Department of Neurology, Aichi Medical University, Nagakute, Japan; Parkinson's Disease Advanced Therapy Center, Aichi Medical University Hospital, Nagakute, Japan
| | - Mizuki Takagi
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan
| | - Hiromitsu Mori
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan
| | - Yasuto Shimomura
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan
| | - Jun-Ichi Niwa
- Department of Neurology, Aichi Medical University, Nagakute, Japan
| | - Manabu Doyu
- Department of Neurology, Aichi Medical University, Nagakute, Japan
| | - Akihisa Okumura
- Department of Pediatrics, Aichi Medical University, Nagakute, Japan
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Sharma K, Cummock J, Maertens P. Acute Arterial Ischemic Stroke in a Treated Child with Hunter's Syndrome: A Case Report and Review of the Literature. JOURNAL OF PEDIATRIC NEUROLOGY 2021. [DOI: 10.1055/s-0040-1722211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractEnzyme replacement therapy (ERT) has limited therapeutic effects on neurologic, skeletal, and cardiovascular pathophysiology. We report an acute right-sided flaccid hemiparesis in an 11-year-old boy with the severe neuronopathic phenotype of Hunter's syndrome who was receiving weekly idursulfase ERT. Due to his psychomotor regression and epilepsy, his presentation to the hospital was delayed. Computed tomography scan of brain showed no acute changes or hemorrhage. Stroke code was not called as patient was already outside of the time window for tissue plasminogen activator (tPA) therapy. Brain magnetic resonance imaging (MRI) showed diffuse cortical and deep atrophy consistent with his baseline neurological status and restricted diffusion in the territory of the left-middle cerebral artery (MCA) consistent with recent infarction. T1-weighted MRI revealed low signal intensity of the left insular cortex, as well as volume loss, consistent with previous undiagnosed stroke in the same vascular territory. In addition, MR angiogram (MRA) demonstrated left terminal M1 segment MCA occlusion. Echocardiogram showed aortic root dilation and moderate aortic valve insufficiency. Patient was also noted to have bacteremia related to port infection. ERT is limited by blood–brain barrier and the underlying glycosaminoglycans (GAGs) extracellular tissue accumulation which produces a proinflammatory state. GAG and bacterial lipopolysaccharide (LPS) are known to activate toll-like receptor 4 (TLR-4). GAGs released in the extracellular space of intracranial vessels induce inflammation by activating the TLR-4 pathway which is exacerbated by bacterial LPS contributing to focal arteritis. Our case suggests the importance of GAGs in the activation of the TLR-4 pathway as a cause of stroke in Hunter's syndrome.
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Affiliation(s)
- Kamal Sharma
- Division of Pediatric Critical Care, Department of Pediatrics, University of South Alabama College of Medicine, Alabama, United States
| | - Joshua Cummock
- Department of Pediatrics, University of South Alabama College of Medicine, Alabama, United States
| | - Paul Maertens
- Department of Neurology, University of South Alabama College of Medicine, Alabama, United States
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Ayuna A, Stepien KM, Hendriksz CJ, Balerdi M, Garg A, Woolfson P. Cardiac rhythm abnormalities - An underestimated cardiovascular risk in adult patients with Mucopolysaccharidoses. Mol Genet Metab 2020; 130:133-139. [PMID: 32241717 DOI: 10.1016/j.ymgme.2020.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 03/25/2020] [Accepted: 03/25/2020] [Indexed: 11/16/2022]
Abstract
Patients with Mucopolysaccharidosis (MPS) have an increased risk of cardiovascular complications, conduction tissue abnormalities and arrhythmia; all rare but underestimated. It has been reported that conduction system defects are progressive in this group of patients and may result in sudden cardiac death. The aim of this study is to review our current practice and suggest best practice guidelines regarding the frequency of cardiac rhythm monitoring in this patient group. Seventy-seven adult MPS patients who attended metabolic clinics between 2013 and 2019 were included in this retrospective observational study. Patients were affected with different MPS types: MPS I (n = 33), MPS II (n = 16), MPS IV (n = 19), VI (n = 8) and VII (n = 1). The assessments included: 12‑lead electrocardiogram (ECG), 24-h ECG (Holter monitor), loop recorder/pacemaker interrogation assessment. Data from 12‑lead ECG (available from 69 patients) showed a variety of abnormalities: T wave inversion in a single lead III (n = 19), left ventricular hypertrophy (n = 14), early repolarization (n = 14), right axis deviation (RAD, n = 11), partial RBBB (n = 9), right bundle branch block (RBBB) (n = 1) and first degree AV block (n = 1). ECG changes of bundle branch block, RAD (left posterior fascicular block) could represent conduction tissue abnormality and equally could be related to the underlying lung tissue abnormality which is present in most of the patients with MPS. T wave abnormality in a single lead is usually insignificant in healthy individuals; however in MPS patients it could be as a result of chest shape. Among the 34 patients for who 24-hour ECG was available, sinus tachycardia was the most common rhythm noted (n = 9), followed by sinus bradycardia (n = 4), atrial fibrillation (AF) (n = 1) and atrio-ventricular nodal re-entry tachycardia (AVNRT) (n = 1). Permanent pacemaker was inserted in two patients. AF was observed in one patient with MPS II. In conclusion, we postulate that regular cardiac monitoring is required to warrant early detection of underlying conduction tissue abnormalities. In addition, 12‑lead ECG is the first line investigation that, if abnormal, should be followed up by 24-hour Holter monitoring. These findings warrant further research studies.
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Affiliation(s)
- Ahmed Ayuna
- Cardiology Department, Salford Royal NHS Foundation Trust, Salford, United Kingdom
| | - Karolina M Stepien
- Adult Inherited Metabolic Medicine Department, Salford Royal NHS Foundation Trust, Salford, M6 8HD, United Kingdom.
| | | | - Matthew Balerdi
- Cardiology Department, Hull and East Yorkshire Hospitals and Northern Lincolnshire and Goole Hospitals, United Kingdom
| | - Anupam Garg
- Cardiology Department, Royal United Hospitals Bath NHS Foundation Trust, Bath, United Kingdom
| | - Peter Woolfson
- Cardiology Department, Salford Royal NHS Foundation Trust, Salford, United Kingdom
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Cardiac issues in adults with the mucopolysaccharidoses: current knowledge and emerging needs. Heart 2016; 102:1257-62. [DOI: 10.1136/heartjnl-2015-309258] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/29/2016] [Indexed: 02/01/2023] Open
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Fujii D, Manabe Y, Tanaka T, Kono S, Sakai Y, Narai H, Omori N, Furujyo M, Abe K. Scheie Syndrome Diagnosed After Cerebral Infarction. J Stroke Cerebrovasc Dis 2012; 21:330-2. [DOI: 10.1016/j.jstrokecerebrovasdis.2010.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2010] [Revised: 08/27/2010] [Accepted: 09/05/2010] [Indexed: 10/18/2022] Open
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Al Sawaf S, Mayatepek E, Hoffmann B. Neurological findings in Hunter disease: pathology and possible therapeutic effects reviewed. J Inherit Metab Dis 2008; 31:473-80. [PMID: 18618289 DOI: 10.1007/s10545-008-0878-x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Revised: 05/03/2008] [Accepted: 05/20/2008] [Indexed: 12/17/2022]
Abstract
Hunter disease (mucopolysaccharidosis type II, MPS II) is an X-linked lysosomal storage disease caused by deficiency of iduronate-2-sulfatase. Accumulation of chondroitin sulfate B and heparan sulfate in various tissues is the biochemical consequence of MPS II. Children with Hunter disease are normal at birth, and symptoms occur between 2 and 10 years of age. Typical symptoms include coarse facies with enlarged tongue and prominent forehead as well as a short, stocky built stature with short neck. The cardiovascular, respiratory and gastrointestinal systems may be affected, and oral, dermatological and psychiatric as well as neurological complications are described. Life expectancy is markedly reduced and may be limited to 12 years for severely affected patients. The most common causes of death are airway obstruction and cardiac failure. The most severe symptoms may result from neurological symptoms or complications including hydrocephalus, spinal cord compression, cervical myelopathy, optic nerve compression, and hearing impairment. Patients may also develop carpal tunnel syndrome, sleep apnoea, seizures or mental retardation. This review describes characteristic neurological manifestations in MPS II and its underlying pathophysiology. In addition, an appraisal is given whether or not enzyme replacement therapy may be able to improve in particular the neurological symptoms of Hunter disease.
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Affiliation(s)
- S Al Sawaf
- Department of General Pediatrics, University Children's Hospital, Heinrich-Heine-University, Moorenstr. 5, D-40225, Düsseldorf 20, Germany
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