Role of sialic acid in erythrocyte survival
JR Durocher, RC Payne and ME Conrad
Department of Hematology, Walter Reed Army Institute of Research, Walter
Reed Army Medical Center, Washington, D.C. 20012.
The role of membrane sialic acid in erythrocyte survival is unclear,
although there is evidence for a reduction in sialic acid and surface
charge in older erythrocytes. We reduced the surface charge of human, rat,
and rabbit erythrocytes by removing sialic acid with neuraminidase.
Reduction in sialic acid correlated with decreases in electrophoretic
mobility and loss of PAS staining of membrane glycoproteins on
polyacrylamide gels. No changes in ATP levels or deformability were found.
51Cr erythrocyte survivals in rats and rabbits showed rapid clearance of
desialylated erythrocytes with sequestration by the liver. These results
suggest that reduction in erythrocyte sialic acid is a mechanism of
erythrocyte destruction and may be important in erythrocyte senescence.
Volume 45,
Issue 1,
pp. 11-20,
01/01/1975
Copyright © 1975 by The American Society of Hematology