Systematic name M1784
Brief description Genes changed in U373-MG cells (malignant glioma) upon treatment with arsenic trioxide [PubChem=14888], a chemical that can cause autophagic cell death.
Full description or abstract Arsenic trioxide (As(2)O(3)) has shown considerable efficacy in treating hematological malignancies with induction of programmed cell death (PCD) type I, apoptosis. However, the mechanisms underlying the antitumor effect of As(2)O(3) on solid tumors are poorly defined. Previously, we reported that As(2)O(3) induced autophagic cell death (PCD type II) but not apoptosis in human malignant glioma cell lines. The purpose of this study was to elucidate the molecular pathway leading to autophagic cell death. In this study, we demonstrated that the cell death was accompanied by involvement of autophagy-specific marker, microtubule-associated protein light chain 3 (LC3), and damage of mitochondrial membrane integrity, but not by caspase activation. Analysis by cDNA microarray, RT-PCR, and Western blot showed that cell death members of Bcl-2 family, Bcl-2/adenovirus E1B 19-kDa-interacting protein 3 (BNIP3) and its homologue BNIP3-like (BNIP3L), were upregulated in As(2)O(3)-induced autophagic cell death. Exogenous expression of BNIP3, but not BNIP3L, induced autophagic cell death in malignant glioma cells without As(2)O(3) treatment. When upregulation of BNIP3 induced by As(2)O(3) was suppressed by a dominant-negative effect of the transmembrane-deleted BNIP3 (BNIP3 Delta TM), autophagic cell death was inhibited. In contrast, BNIP3 transfection augmented As(2)O(3)-induced autophagic cell death. These results suggest that BNIP3 plays a central role in As(2)O(3)-induced autophagic cell death in malignant glioma cells. This study adds a new concept to characterize the pathways by which As(2)O(3) acts to induce autophagic cell death in malignant glioma cells.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 15592527   Authors: Kanzawa T,Zhang L,Xiao L,Germano IM,Kondo Y,Kondo S
Exact source Table 1S
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