Wakayama Y, Kumagai T, Jimi T, Shibuya S. Freeze-fracture analysis of cholesterol in muscle plasma membrane of Fukuyama-type congenital muscular dystrophy.
Acta Neuropathol 1987;
75:46-50. [PMID:
3434215 DOI:
10.1007/bf00686792]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We used digitonin in freeze-fracture analysis of the muscle plasma membrane cholesterol content in six patients with Fukuyama-type congenital muscular dystrophy and six control children. A significantly greater proportion of surface area was taken up by digitonin-cholesterol complexes in the patients (51.2% +/- 4.7%) than in controls (31.9% +/- 2.9%) (P less than 0.01). Since membrane cholesterol has a dynamic regulatory function in affecting the activity of membrane-bound proteins, the increased cholesterol content in the patients suggests a functional abnormality of the muscle plasma membrane in this disease.
Collapse