期刊
LEUKEMIA
卷 22, 期 3, 页码 585-592出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/sj.leu.2405058
关键词
lipoprotein lipase; chronic lymphocytic leukemia; orlistat; apoptosis
Constitutively activated pathways contribute to apoptosis resistance in chronic lymphocytic leukemia (CLL). Little is known about the metabolism of lipids and function of lipases in CLL cells. Performing gene expression profiling including B-cell receptor (BCR) stimulation of CLL cells in comparison to healthy donor CD5 + B cells, we found significant overexpression of lipases and phospholipases in CLL cells. In addition, we observed that the recently defined prognostic factor lipoprotein lipase (LPL) is induced by stimulation of BCR in CLL cells but not in CD5 + normal B cells. CLL cellular lysates exhibited significantly higher lipase activity compared to healthy donor controls. Incubation of primary CLL cells (n = 26) with the lipase inhibitor orlistat resulted in induction of apoptosis, with a halfmaximal dose (IC50) of 2.35 mu M. In healthy B cells a significantly higher mean IC50 of 148.5 mu M of orlistat was observed, while no apoptosis was induced in healthy peripheral blood mononuclear cells (PBMCs; P < 0.001). Orlistat-mediated cytotoxicity was decreased by BCR stimulation. Finally, the cytotoxic effects of orlistat on primary CLL cells were enhanced by the simultaneous incubation with fludarabine (P = 0.003). In summary, alterations of lipid metabolism are involved in CLL pathogenesis and might represent a novel therapeutic target in CLL.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据