Rapid internalization of exogenous ganglioside GM3 and its metabolism to ceramide in human myelogenous leukemia HL‐60 cells compared with control ganglioside GM1

FEBS Letters

Nakamura, Mitsuru¹  Saito, Masaki¹  Furukawa, Yusuke¹  Sakai, Takao¹  Tsunoda, Atsuko¹ 

[1] Division of Hemopoiesis, Institute of Hematology, Jichi Medical School, Minamikawachi, Tochigi 329-04, Japan

关键词: Ganglioside;    Ceramide;    Differentiation;    HL-60 cell;    Monocytic lineage;    LacCer;    lactosylceramide;    GM3;    II3NeuAc-LacCer;    GM2;    II3NeuAc-GgOse3Cer;    GM1;    II3NeuAc-GgOse4Cer;    Cer;    ceramide;    HPTLC;    high-performance thin-layer chromatography;    PBS;    phosphate-buffered saline;   

DOI  :  10.1016/S0014-5793(96)01415-9

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Incorporation and metabolism of exogenous GM3 in human myelogenous leukemia HL-60 cells were analyzed using ³H-labeled GM3 ([³H]GM3). [³H]GM3 was rapidly internalized into the cells (trypsin-resistant fraction) 8 times more than the control, ³H-labeled GM1 ([³H]GM1). In addition, not only incorporation but also metabolism of [³H]GM3 was more rapid than [³H]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.

【 授权许可】

Unknown