PMID- 21725207 OWN - NLM STAT- MEDLINE DCOM- 20120119 LR - 20200930 IS - 1555-8576 (Electronic) IS - 1538-4047 (Linking) VI - 12 IP - 6 DP - 2011 Sep 15 TI - Interferon-alpha sensitizes human gastric cancer cells to TRAIL-induced apoptosis via activation of the c-CBL-dependent MAPK/ERK pathway. PG - 494-502 LID - 10.4161/cbt.12.6.15973 [doi] AB - Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a member of the tumor necrosis factor family that induces apoptosis in cancer cells. However, gastric cancer cells are insensitive to TRAIL. In the present study, we show that pretreatment with IFN-alpha enhanced TRAIL-induced apoptosis of gastric cancer MGC803 cells. IFN-alpha up-regulated death receptor 5 (DR5) expression and down-regulated survivin expression. Furthermore, extracellular-regulated protein kinase (ERK1/2) activation was induced by IFN-alpha, and a combination of IFN-alpha and TRAIL led to further activation of ERK1/2. Inhibition of the MAPK/ERK signaling pathway partially reversed apoptosis, as well as the expression patterns of DR5 and survivin. Moreover, the expression of the c-casitas B-lineage lymphoma (c-Cbl) family was down-regulated by IFN-alpha. Transfection of c-Cbl suppressed IFN-alpha-induced ERK activation. These results indicate that IFN-alpha enhances TRAIL-induced apoptosis in gastric cancer cells at least partially via downregulation of c-Cbl, and subsequent up-regulation of the MAPK/ERK pathway. FAU - Qu, Jinglei AU - Qu J AD - China Medical University, Heping District, Shenyang City. qu_xiujuan@hotmail.com FAU - Zhao, Mingfang AU - Zhao M FAU - Teng, Yuee AU - Teng Y FAU - Zhang, Ye AU - Zhang Y FAU - Hou, Kezuo AU - Hou K FAU - Jiang, Youhong AU - Jiang Y FAU - Yang, Xianghong AU - Yang X FAU - Shang, Hong AU - Shang H FAU - Qu, Xiujuan AU - Qu X FAU - Liu, Yunpeng AU - Liu Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110915 PL - United States TA - Cancer Biol Ther JT - Cancer biology & therapy JID - 101137842 RN - 0 (Antineoplastic Agents) RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (Interferon-alpha) RN - 0 (Protein Kinase Inhibitors) RN - 0 (TNF-Related Apoptosis-Inducing Ligand) RN - 0 (TNFSF10 protein, human) RN - EC 2.3.2.27 (Proto-Oncogene Proteins c-cbl) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 3.4.22.- (Caspases) RN - EC 6.3.2.- (CBL protein, human) SB - IM MH - Antineoplastic Agents/*pharmacology MH - Apoptosis/*drug effects MH - Apoptosis Regulatory Proteins/metabolism MH - Caspases/metabolism MH - Cell Line, Tumor MH - Drug Synergism MH - Enzyme Activation MH - Gene Expression MH - Humans MH - Interferon-alpha/*pharmacology MH - *MAP Kinase Signaling System MH - Mitogen-Activated Protein Kinases/antagonists & inhibitors/metabolism MH - Protein Kinase Inhibitors/pharmacology MH - Proto-Oncogene Proteins c-cbl/genetics/*metabolism MH - Stomach Neoplasms MH - TNF-Related Apoptosis-Inducing Ligand/*pharmacology EDAT- 2011/07/05 06:00 MHDA- 2012/01/20 06:00 CRDT- 2011/07/05 06:00 PHST- 2011/07/05 06:00 [entrez] PHST- 2011/07/05 06:00 [pubmed] PHST- 2012/01/20 06:00 [medline] AID - 15973 [pii] AID - 10.4161/cbt.12.6.15973 [doi] PST - ppublish SO - Cancer Biol Ther. 2011 Sep 15;12(6):494-502. doi: 10.4161/cbt.12.6.15973. Epub 2011 Sep 15.