Erythrocyte membrane skeleton abnormalities in hereditary spherocytosis

British Journal of Haematology
B E Burke, D Shotton

Abstract

Erythrocyte ghosts from eight individuals with hereditary spherocytosis have been compared with respect to their protein compositions as judged by SDS gel electrophoresis, their ease of spectrin extractability, and their freeze-etch electron microscopic appearance after incubation in condition designed to promote aggregation of the intramembrane particles. Four of these HS cases were unrelated, while the other four represented two generations from a single family, including a pair of identical twins, one of whom had not undergone splenectomy when this investigation was initiated. Of the four unrelated cases, one showed no departures from normal under the conditions of this investigation, whereas the other three exhibited features which suggested a membrane skeleton lesion. In one of these there was a reduced proportion of spectrin tetramers relative to dimers in 4 degrees C extracts, while the two remaining cases exhibited abnormal intramembrane particle aggregation. The four related cases had almost identical variations from normal. Spectrin was not extractable from their ghost membranes during a mild extraction incubation which removed spectrin from normal control ghosts. However, the intramembrane particle aggregation subseq...Continue Reading

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Related Concepts

N-Actin
SDS-PAGE
Red Cell Ghost
Erythrocytes
Freeze Etching
Cell Surface Proteins
Electron Microscopy
Osmolality
Spectrin
Hereditary Spherocytosis

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