mucolipidoses/seizures

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Seizure remission and improvement of neurological function in sialidosis with perampanel therapy.

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A 15-year-old boy experienced myoclonic seizures for 3 years. He initially had occasional myoclonus, gradually progressive ataxia, tremors, and psychomotor and speech regression developed. Eventually, he exhibited nearly continuous myoclonus. He received treatment of sodium valproate, levetiracetam,

Type 1 sialidosis presenting with ataxia, seizures and myoclonus with no visual involvement.

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Sialidosis is an autosomal recessive lysosomal storage disease caused by pathogenic variants in NEU1 which encodes lysosomal sialidase (neuraminidase 1). Lysosomal neuraminidase catalyzes the removal of terminal sialic acid molecules from glycolipids, glycoproteins and oligosaccharides. Sialidosis

Clinical and Genetic Characteristics of Type I Sialidosis Patients in Mainland China

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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

[Sialidosis type I. Two cases in a family].

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METHODS We present two cases of sialidosis type 1 in two brothers, 28 and 30 years of age. Both have seizures and severe gait instability. Ophthalmoscopic examination showed a cherry-red spot in both eyes. Fibroblast culture revealed a marked reduction in neuraminidase with no alteration in

I-cell disease: clinical studies of 21 Japanese cases.

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Clinical pictures of 21 cases with I-cell disease patients, 12 males and 9 females, were analyzed. Characteristic coarse facial features and shortness of stature were observed in all cases. In general, the motor development was found to be more severely retarded than the mental development of the

Adult type mucolipidosis with beta-galactosidase and sialidase deficiency. Histological and biochemical studies.

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A case of adult type mucolipidosis with beta-galactosidase and sialidase deficiency is described. This patient, a woman aged 20, had mental retardation, macular cherry-red spots, corneal clouding, gargoyle-like face, cerebellar ataxia, myoclonus and convulsions beginning at the age of 14. Bony

Electroencephalographic findings in patients with mucolipidosis type IV.

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OBJECTIVE To describe the electroencephalographic findings in mucolipidosis type IV (ML IV), a lysosomal storage disease of unknown etiology characterized clinically by corneal clouding, retinal degeneration and severe psychomotor retardation. Most patients are of Ashkenazi-Jewish ancestry. The EEG

I-cell disease.

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A 6-month-old female infant presented with severe psychomotor retardation, coarse facies, gingival hyperplasia, thick skin, restricted joint movements and radiological features suggestive of the Hurler syndrome. Her urine showed no excess excretion of mucopolysaccharides. I-cell disease was

Clinical and electrophysiological characteristics of a type 1 sialidosis patient with a novel deletion mutation in NEU1 gene.

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Type 1 sialidosis is a rare autosomal recessive lysosomal storage disease caused by Neuraminidase 1 (NEU1) gene mutations. We report a type 1 sialidosis patient with a novel deletion mutation in NEU1 and compared the phenotypes within different

Multigene panel next generation sequencing in a patient with cherry red macular spot: Identification of two novel mutations in NEU1 gene causing sialidosis type I associated with mild to unspecific biochemical and enzymatic findings.

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BACKGROUND Lysosomal storage diseases (LSD) often manifest with cherry red macular spots. Diagnosis is based on clinical features and specific biochemical and enzymatic patterns. In uncertain cases, genetic testing with next generation sequencing can establish a diagnosis, especially in milder or

Neurophysiolgical implications in sialidosis type 1: a case report

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Sialidosis is a rare autosomal recessive hereditary disease caused by NEU1 gene mutations. A 25-year-old woman developed generalized tonic-clonic seizures since teenage, followed by progressive visional decline and limb myoclonus. Her sister had similar presentations. Both patients were

Diagnosis and Management of Type 1 Sialidosis: Clinical Insights from Long-Term Care of Four Unrelated Patients

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Background: Sialidosis is a rare autosomal recessive disease caused by NEU1 mutations, leading to neuraminidase deficiency and accumulation of sialic acid-containing oligosaccharides and glycopeptides into the tissues. Sialidosis is divided into two clinical entities, depending on

Type 1 Sialidosis Patient With a Novel Deletion Mutation in the NEU1 Gene: Case Report and Literature Review.

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Recent advances in next-generation sequencing technologies have uncovered the genetic backgrounds of various diseases. Type 1 sialidosis (OMIM#256550) is a rare autosomal recessive lysosomal storage disease caused by a mutation in the NEU1 (OMIM * 608272) gene. In this study, we aimed to review the

Molecular pathology of NEU1 gene in sialidosis.

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Lysosomal sialidase (EC 3.2.1.18) has a dual physiological function; it participates in intralysosomal catabolism of sialylated glycoconjugates and is involved in cellular immune response. Mutations in the sialidase gene NEU1, located on chromosome 6p21.3, result in autosomal recessive disorder,

A longitudinal study of Taiwanese sialidosis type 1: an insight into the concept of cherry-red spot myoclonus syndrome.

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OBJECTIVE Sialidosis type 1 (ST-1) is a neurodegenerative disorder with limited long-term follow-up report. This study is to document the chronological profile of ST-1. METHODS We perform serial analysis of 17 Taiwanese patients with ST-1 focusing on evolution of clinical features,

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