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Retinopathy and Vision Loss. Neuroophthalmology 2022. [DOI: 10.1007/978-981-19-4668-4_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Wan C, Lin M, Jiang M, Hua R. Multimodal imaging findings in a patient with type I sialidosis with a compound heterozygous mutation in the NEU1 gene. Quant Imaging Med Surg 2021; 11:4219-4222. [PMID: 34476202 DOI: 10.21037/qims-20-891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 01/18/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Chao Wan
- Department of Ophthalmology, First Hospital of China Medical University, Shenyang, China
| | - Meina Lin
- Key Laboratory of Reproductive Health, Liaoning Province Research Institute of Family Planning, China Medical University, Shenyang, China
| | - Miao Jiang
- Key Laboratory of Reproductive Health, Liaoning Province Research Institute of Family Planning, China Medical University, Shenyang, China
| | - Rui Hua
- Department of Ophthalmology, First Hospital of China Medical University, Shenyang, China
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Daich Varela M, Zein WM, Toro C, Groden C, Johnston J, Huryn LA, d'Azzo A, Tifft CJ, FitzGibbon EJ. A sialidosis type I cohort and a quantitative approach to multimodal ophthalmic imaging of the macular cherry-red spot. Br J Ophthalmol 2021; 105:838-843. [PMID: 32753397 PMCID: PMC8142419 DOI: 10.1136/bjophthalmol-2020-316826] [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: 05/06/2020] [Revised: 06/16/2020] [Accepted: 06/21/2020] [Indexed: 11/03/2022]
Abstract
AIM To describe the ophthalmologic findings on the largest cohort of patients with sialidosis type I due to deficiency of the lysosomal sialidase, neuraminidase 1 (NEU1) and to introduce a quantitative neuroretinal image analysis approach to the associated 'macular cherry-red spot'. METHODS Seven patients with sialidosis type I (mutations in NEU1) and one with galactosialidosis (mutations in CTSA) were included. All patients underwent detailed ophthalmological examinations. The reflectivity of macular optical coherence tomography (OCT) was measured using greyscale analysis (Fiji) and compared with age-matched healthy volunteers. Four patients were evaluated over a time of 1.5+0.5 years. RESULTS The mean age of the patients at their first visit was 27.5+9.8 years. All patients had a macular cherry-red spot, clear corneas and visually non-significant lenticular opacities. The mean visual acuity was LogMar 0.4 (20/50)+0.4 (20/20 to 20/125). Six patients had good visual function. Optic atrophy was present in two individuals with reduced acuity. A significant increase in macular reflectivity was present in all patients compared to age-matched controls (p<0.0001). CONCLUSION Most of our patients (75%) have preserved visual acuity, even in adulthood. The presence of optic atrophy is associated with poor visual acuity. Increased macular reflectivity by OCT greyscale measurements is noted in all patients, although the underlying biological basis is unknown. These findings complement the current methods for examining and monitoring disease progression, especially in patients for whom visualisation of the cherry-red spot is not entirely clear. TRIAL REGISTRATION NUMBER NCT00029965.
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Affiliation(s)
- Malena Daich Varela
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Wadih M Zein
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Camilo Toro
- Medical Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Catherine Groden
- Medical Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Jean Johnston
- Medical Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Laryssa A Huryn
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Alessandra d'Azzo
- Department of Genetics, Saint Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Cynthia J Tifft
- Medical Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland, USA
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Rossi S, Gesualdo C, Tartaglione A, Bilo L, Coppola A, Simonelli F. Bergmeister's papilla in a young patient with type 1 sialidosis: case report. BMC Ophthalmol 2020; 20:356. [PMID: 32867703 PMCID: PMC7460740 DOI: 10.1186/s12886-020-01628-1] [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: 04/07/2020] [Accepted: 08/25/2020] [Indexed: 11/10/2022] Open
Abstract
Background Sialidosis is a rare genetic lysosomal storage disorder caused by a deficit of neuraminidase enzyme activity. Patients with sialidosis present various neurological disorders such as: myoclonic epilepsy and hypotonia, often associated with visual impairment. A typical aspect of sialidosis is the finding of a macular cherry-red spot on ocular fundus examination. In this paper we describe a unilateral case of Bergmeister’s papilla (BP) in a young female patient suffering from type 1 sialidosis. Case presentation A 28-year-old young woman suffering from type 1 sialidosis, confirmed by previously described compound heterozigosity Leu91Arg and Gly328Ser on N-acetyl-alpha-neuraminidase − 1 (NEU1) gene, underwent an opthalmological examination at the Eye Clinic of the University of Campania L. Vanvitelli, for bilateral visual deterioration. The patient was suffering from myoclonic epilepsy with hypotonia and severe motor disability. Fundoscopic examination showed a typical macular cherry-red spot with retinal pigment epithelium dystrophy in the middle periphery, in both eyes. Furthermore, in the left eye (OS), a vitreous thickening was observed in the nasal sector of the optic disc, remnant of fetal vasculature on the optic disc (Bergmeister’s papilla). Optical coherence tomography (OCT) showed, in both eyes, a thickening of the ganglion cell layer (GCL) with a hyperreflective opacity as a cap on the left optic disc. Conclusions In our paper we have described, for the first time in literature, a case of BP in a patient with type 1 sialidosis. The detection of BP with thickening of the peripapillary vitreous by SD-OCT is useful in monitoring any vitreo-retinal change that could cause future visual deterioration.
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Affiliation(s)
- Settimio Rossi
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania L. Vanvitelli, 80131, Naples, Italy
| | - Carlo Gesualdo
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania L. Vanvitelli, 80131, Naples, Italy.
| | - Antonio Tartaglione
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania L. Vanvitelli, 80131, Naples, Italy
| | - Leonilda Bilo
- Department of Neuroscience and Reproductive and Odontostomatological Sciences, Federico II University, Naples, Italy
| | - Antonietta Coppola
- Department of Neuroscience and Reproductive and Odontostomatological Sciences, Federico II University, Naples, Italy
| | - Francesca Simonelli
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania L. Vanvitelli, 80131, Naples, Italy
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Lv RJ, Li TR, Zhang YD, Shao XQ, Wang Q, Jin LR. Clinical and genetic characteristics of type I sialidosis patients in mainland China. Ann Clin Transl Neurol 2020; 7:911-923. [PMID: 32472645 PMCID: PMC7318099 DOI: 10.1002/acn3.51058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 11/23/2022] Open
Abstract
Objective Type I sialidosis (ST‐1) is a rare autosomal recessive inherited disorder. To date, there has been no study on ST‐1 patients in mainland China. Methods We reported in detail the cases of five Chinese ST‐1 patients from two centers, and summarized all worldwide cases. Then, we compared the differences between Chinese and foreign patients. Results A total of 77 genetically confirmed ST‐1 patients were identified: 12 from mainland China, 23 from Taiwan, 10 from other Asian regions, and 32 from European and American regions. The mean age of onset was 16.0 ± 6.7 years; the most common symptoms were myoclonus seizures (96.0%), followed by ataxia (94.3%), and blurred vision (67.2%). Compared to other groups, the onset age of patients from mainland China was much younger (10.8 ± 2.7 years). The incidence of visual impairment was lower in patients from other Asian regions than in patients from mainland China and Taiwan (28.6% vs. 81.8%–100%). Cherry‐red spots were less frequent in the Taiwanese patients than in patients from other regions (27.3% vs. 55.2%–90.0%). Furthermore, 48 different mutation types were identified. Chinese mainland and Taiwanese patients were more likely to carry the c.544A > G mutation (75% and 100%, respectively) than the patients from other regions (only 0%–10.0%). Approximately 50% of Chinese mainland patients carried the c.239C > T mutation, a much higher proportion than that found in the other populations. In addition, although the brain MRI of most patients was normal, 18F‐FDG‐PET analysis could reveal cerebellar and occipital lobe hypometabolism. Interpretation ST‐1 patients in different regions are likely to have different mutation types; environmental factors may influence clinical manifestations. Larger studies enrolling more patients are required.
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Affiliation(s)
- Rui-Juan Lv
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University; China National Clinical Research Center for Neurological Diseases, 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, PR. China
| | - Tao-Ran Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University; China National Clinical Research Center for Neurological Diseases, 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, PR. China.,Department of Neurology, Xuanwu Hospital of Capital Medical University, 45 Chang Chun Road, Xicheng District, Beijing, 100053, PR. China
| | - Yu-Di Zhang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University; China National Clinical Research Center for Neurological Diseases, 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, PR. China.,Department of Neurology, the Second Hospital of Hebei Medical University, Hebei Medical University, 215 Heping West Road, Xinhua District, Hebei, 050000, Shijiazhuang, PR. China
| | - Xiao-Qiu Shao
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University; China National Clinical Research Center for Neurological Diseases, 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, PR. China
| | - Qun Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University; China National Clinical Research Center for Neurological Diseases, 119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, PR. China
| | - Li-Ri Jin
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuaifuyuan, Dongcheng District, Beijing, 100730, PR. China
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Han X, Wu S, Wang M, Li H, Huang Y, Sui R. Genetic and clinical characterization of mainland Chinese patients with sialidosis type 1. Mol Genet Genomic Med 2020; 8:e1316. [PMID: 32453490 PMCID: PMC7434748 DOI: 10.1002/mgg3.1316] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/25/2020] [Accepted: 04/28/2020] [Indexed: 12/26/2022] Open
Abstract
Background Sialidosis type 1 is a rare inherited disorder with a high disability. No genetically confirmed mainland Chinese patient with sialidosis type 1 has been reported. This study evaluated the phenotypes and genotypes of mainland Chinese patients with sialidosis type 1. Methods It was a retrospective case series study. Four unrelated patients were enrolled. Comprehensive clinical evaluations and molecular genetic analysis of the NEU1 gene were performed. Results Three out of four patients presented progressive myoclonus epilepsy. The best‐corrected visual acuity ranged from 20/2000 to 20/25. Punctate cataracts were found in all of the patients. Distinct macular cherry red spots were observed in three patients by fundoscopy, and a relatively normal fundus was revealed in one patient. Optical coherence tomography (OCT) showed increased reflectivity of the nerve fiber and ganglion cell layers, and fundus autofluorescence (FAF) revealed hyperautofluorescent areas surrounding the fovea in all of the patients. Only superficial retinal vessels can be observed using OCT angiography; the deeper capillary plexus could not be observed. Visual evoked potential revealed varying degrees of decreased amplitude and/or prolonged latency of P100 or P2 waves. The most frequent sequence variant identified was c.544A>G (p.S182G) (NM_000434.3). Conclusions Our study first described the ophthalmic and neurologic characteristics of a small cohort of unrelated mainland Chinese patients with sialidosis type 1. We found that c.544A>G (p. S182G) might be a hotspot variant in Chinese patients. The accumulation of metabolic products in the nerve fiber and ganglion cell layers is a characteristic ocular finding that could be sensitively detected by OCT and FAF imaging.
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Affiliation(s)
- Xiaoxu Han
- Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Ocular Fundus Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Shijing Wu
- Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Ocular Fundus Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Min Wang
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
| | - Hui Li
- Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Ocular Fundus Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yan Huang
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Ruifang Sui
- Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Ocular Fundus Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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Caciotti A, Melani F, Tonin R, Cellai L, Catarzi S, Procopio E, Chilleri C, Mavridou I, Michelakakis H, Fioravanti A, d'Azzo A, Guerrini R, Morrone A. Type I sialidosis, a normosomatic lysosomal disease, in the differential diagnosis of late-onset ataxia and myoclonus: An overview. Mol Genet Metab 2020; 129:47-58. [PMID: 31711734 DOI: 10.1016/j.ymgme.2019.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/23/2019] [Accepted: 09/23/2019] [Indexed: 01/12/2023]
Abstract
Lysosomal storage diseases (LSDs) are rare to extremely rare monogenic disorders. Their incidence, however, has probably been underestimated owing to their complex clinical manifestations. Sialidosis is a prototypical LSD inherited as an autosomal recessive trait and caused by mutations in the NEU1 gene that result in a deficiency of alpha-N-acetyl neuraminidase 1 (NEU1). Two basic forms of this disease, type I and type II, are known. The dysmorphic type II form features LSD symptoms including congenital hydrops, dysmorphogenetic traits, hepato-splenomegaly and severe intellectual disability. The diagnosis is more challenging in the normosomatic type I forms, whose clinical findings at onset include ocular defects, ataxia and generalized myoclonus. Here we report the clinical, biochemical and molecular analysis of five patients with sialidosis type I. Two patients presented novel NEU1 mutations. One of these patients was compound heterozygous for two novel NEU1 missense mutations: c.530A>T (p.Asp177Val) and c.1010A>G (p.His337Arg), whereas a second patient was compound heterozygous for a known mutation and a novel c.839G>A (p.Arg280Gln) mutation. We discuss the impact of these new mutations on the structural properties of NEU1. We also review available clinical reports of patients with sialidosis type I, with the aim of identifying the most frequent initial clinical manifestations and achieving more focused diagnoses.
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Affiliation(s)
- Anna Caciotti
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy
| | - Federico Melani
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy
| | - Rodolfo Tonin
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy
| | - Lucrezia Cellai
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy
| | - Serena Catarzi
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy; Department of NEUROFARBA, University of Florence, Florence, Italy
| | - Elena Procopio
- Metabolic and Muscular Unit, Meyer Children's Hospital, Florence, Italy
| | - Chiara Chilleri
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy
| | - Irene Mavridou
- Division of Enzymology and Cellular Function, Institute of Child Health, Athens, Greece
| | - Helen Michelakakis
- Division of Enzymology and Cellular Function, Institute of Child Health, Athens, Greece
| | - Antonella Fioravanti
- Structural Biology, Research Center-VIB (Flanders Interuniversity Institute for Biotechnology), University of Brussels, Belgium
| | - Alessandra d'Azzo
- Dep. of Genetics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Renzo Guerrini
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy; Department of NEUROFARBA, University of Florence, Florence, Italy
| | - Amelia Morrone
- Paediatric Neurology Unit and Laboratories, Meyer Children's Hospital, Florence, Italy; Department of NEUROFARBA, University of Florence, Florence, Italy.
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Wang IH, Lin TY, Kao ST. Optical coherence tomography features in a case of Type I sialidosis. Taiwan J Ophthalmol 2017; 7:108-111. [PMID: 29018767 PMCID: PMC5602148 DOI: 10.4103/tjo.tjo_53_17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
A 15-year-old boy presented with progressive myoclonic epilepsy and unbalance gaits for 4 years. Slit lamp examination showed a punctate cataract and funduscopic examination revealed bilateral macular cherry-red spots. Macular scan of spectral domain optical coherence tomography (SD-OCT) showed hyperreflectivity of the inner retinal layer and apparent hyperreflectivity of the photoreceptor layers in the foveal region. The clinical presentations were consistent with a Type I sialidosis which led to genetic analysis and revealed NEU1 mutation in this patient. He was under regular follow-up by ophthalmologist and neurologist. Sialidosis is a rare lysosomal storage disease resulting from a deficiency of alpha-N-acetyl neuraminidase caused by a mutation in the NEU1 gene. This results in abnormal intracellular accumulation of sialyloligosaccharides in brain neurons and ganglion cells of the retina. SD-OCT is a useful tool in detecting macular cherry-red spot and has a role in evaluating the extent of ganglion cell damage. It can aid in the differential diagnosis and long-term follow-up of the neurological metabolic disorders.
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Affiliation(s)
- I-Hua Wang
- Department of Ophthalmology, Cathay General Hospital, Taipei, Taiwan
| | - Ting-Yu Lin
- Department of Ophthalmology, Cathay General Hospital, Taipei, Taiwan
| | - Shu-Ting Kao
- Department of Ophthalmology, Cathay General Hospital, Taipei, Taiwan
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