Ceramide stimulates the uptake of neutral red in human neutrophils, monocytes, and lymphocytes.

Abstract:

:Neutral red is a vital stain known to be accumulated in the lysosomes of neutrophils and monocytes. It is used mainly to identify and detect the activated state of these cells. We have found that the extracellular application of physiological ceramide, i.e., a product of sphingomyelin hydrolysis and a newly defined intracellular second-messenger substance, increased the uptake of neutral red in a dose-dependent manner in human neutrophils, monocytes, and lymphocytes, as demonstrated by flow cytometry. Staurosporine was able to totally block this phenomenon, suggesting the involvement of protein kinase C in the process. These results indicate that the flow-cytometric analysis of ceramide-induced uptake of neutral red can be a new method for the evaluation of lysosome-related activation processes in both phagocytes and lymphocytes.

journal_name

Ann Hematol

journal_title

Annals of hematology

authors

Sipka S,Antal-Szalmás P,Szöllösi I,Csipö I,Lakos G,Szegedi G

doi

10.1007/s002770050015

subject

Has Abstract

pub_date

2000-02-01 00:00:00

pages

83-5

issue

2

eissn

0939-5555

issn

1432-0584

journal_volume

79

pub_type

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