Uptake of radioactivity from 14C-galactose into gangliosides by cultured skin fibroblasts was studied. GM3 was the major ganglioside in control human fibroblasts. An increase of GM1 was demonstrated in GM1-gangliosidosis fibroblasts. The degree of GM1 accumulation was correlated with the clinical types of this disease. The fibroblasts from an infantile-type patient showed a marked increase of GM1. In late-onset types the amount of total gangliosides was only slightly increased, but the distribution of individual gangliosides was definitely abnormal; a relative increase of GM1 was demonstrated in these cases. GM1 β-galactosidase activities were not detectable in either infantile or late-onset cases.
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Suzuki, Y., Nakamura, N. & Fukuoka, K. GM1-gangliosidosis: Accumulation of ganglioside GM1 in cultured skin fibroblasts and correlation with clinical types. Hum Genet 43, 127–131 (1978). https://doi.org/10.1007/BF00293589
- Internal Medicine
- Metabolic Disease
- Relative Increase
- Human Fibroblast
- Skin Fibroblast