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Rapid internalization of exogenous ganglioside GM3 and its metabolism to ceramide in human myelogenous leukemia HL‐60 cells compared with control ganglioside GM1
Author(s) -
Nakamura Mitsuru,
Tsunoda Atsuko,
Furukawa Yusuke,
Sakai Takao,
Saito Masaki
Publication year - 1997
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(96)01415-9
Subject(s) - ceramide , internalization , ganglioside , leukemia , chemistry , metabolism , biochemistry , endogeny , sphingolipid , biology , cell , apoptosis , immunology
Incorporation and metabolism of exogenous GM3 in human myelogenous leukemia HL‐60 cells were analyzed using 3 H‐labeled GM3 ([ 3 H]GM3). [ 3 H]GM3 was rapidly internalized into the cells (trypsin‐resistant fraction) 8 times more than the control, 3 H‐labeled GM1 ([ 3 H]GM1). In addition, not only incorporation but also metabolism of [ 3 H]GM3 was more rapid than [ 3 H]GM1 in HL‐60 cells. Moreover, one of the metabolites was found to co‐migrate with ceramide in thin‐layer chromatography analysis and ceramide formation from exogenous GM3 is more rapid than that from exogenous GM1. These results suggested that there would be some preferential mechanism to produce ceramide from differentiation‐inducible GM3 in HL‐60 cells rather than from non‐inducing GM1.