Effects of Ara-C on neutral sphingomyelinase and mitogen- and stress-activated protein kinases in T-lymphocyte cell lines.
Effects of Ara-C on neutral sphingomyelinase and mitogen- and stress-activated protein kinases in T-lymphocyte cell lines.
复制标题
Ara-C 对 T 淋巴细胞系中中性鞘磷脂酶以及丝裂原和应激激活蛋白激酶的影响。
DOI:
10.1080/15216549600201313
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
Meier,KE
中科院分区:
文献类型:
--
作者:
Bradshaw,CD;Ella,KM;Thomas,AL;Qi,C;Meier,KE
Neutral sphingomyelinase (SMase)1 can be activated by extracellular signals to produce ceramide, which may affect mitogen‐activated protein kinase (MAPK) activities. Neutral SMase activity was assessed in membranes from Jurkat, a human T‐cell line, and EL4, a murine T‐cell line. Ara‐C activated SMase within 10 minutes in both Jurkat and EL4 cells, while phorbol ester (PMA) had no effect. PMA, but not Ara‐C or ceramides, activated ERK MAPKs in Jurkat and EL4. PMA acted synergistically with ionomycin to activate JNK MAPKs in Jurkat and EL4 within 10 minutes. Ara‐C activated JNKs only after prolonged incubation (90‐120 minutes). Thus, ceramide is not a positive signal for ERK activation in T‐cell lines. The effects of Ara‐C on JNK activity may be mediated through secondary response pathways.