Endocytosis of cationized ferritin in human peripheral blood by resting T-lymphocytes.
We have examined the binding and internalization of cationized ferritin in T-lymphocytes of human peripheral blood, as a model for resting cells. After 30 min of incubation only 8% of endocytotic vesicles contain cationized ferritin. T-cells internalize the equivalent of their entire surface area in approximately 54 h, a longer time than is required by non-resting cells such as PHA-stimulated human lymphocytes. These tracer experiments suggest that the endocytosis of cationized ferritin by T-lymphocytes follows a lysosome pathway similar to that described for other cell types.
D001693:Biological Transport, Active; D002462:Cell Membrane / Q000378:metabolism / Q000648:ultrastructure; D004705:Endocytosis / Q000187:drug effects*; D005293:Ferritins / Q000378:metabolism*; D006801:Humans; D007399:Interphase; D008854:Microscopy, Electron; D013601:T-Lymphocytes / Q000378:metabolism* / Q000648:ultrastructure
C010297:polycationic ferritin; D005293:Ferritins