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[Schindler disease/Kanzaki disease]
1Department of Dermatology, Kagoshima University Faculty of Medicine.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|December 1, 1995
Summary
Schindler disease and Kanzaki disease result from a deficiency in alpha-N-acetylgalactosaminidase. Molecular studies reveal distinct point mutations causing these rare lysosomal storage disorders.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Context:
- Schindler disease and Kanzaki disease are rare lysosomal storage disorders.
- Both conditions stem from a deficiency in the enzyme alpha-N-acetylgalactosaminidase (E.C.3.2.1.49).
- Previous reports detailed cases in German, Dutch, and Japanese patients.
Purpose:
- To describe clinical, ultrastructural, and molecular findings in Schindler disease and Kanzaki disease.
- To differentiate between the infantile neuroaxonal dystrophy type (Schindler disease) and the adult angiokeratoma type (Kanzaki disease).
- To analyze the genetic basis of these related disorders.
Summary:
- Schindler disease (type 1) presents with infantile neuroaxonal dystrophy, observed in German and Dutch children.
- Kanzaki disease (type 2) is characterized by angiokeratoma corporis diffusum with minimal neurological involvement, reported in an adult Japanese patient.
- Molecular analyses identified unique point mutations in the gene encoding alpha-N-acetylgalactosaminidase for each disease.
Impact:
- Provides a comprehensive overview of two related lysosomal enzyme deficiencies.
- Highlights the clinical and genetic heterogeneity within alpha-N-acetylgalactosaminidase deficiency.
- Contributes to understanding rare genetic disorders and their molecular underpinnings.