PMID- 26788210 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210927 IS - 1792-1074 (Print) IS - 1792-1082 (Electronic) IS - 1792-1074 (Linking) VI - 10 IP - 6 DP - 2015 Dec TI - Inhibition of tumor necrosis factor-alpha enhances apoptosis induced by nuclear factor-kappaB inhibition in leukemia cells. PG - 3793-3798 AB - Inhibition of nuclear factor-kappaB (NF-kappaB) results in antitumor activity in leukemia cells, and may be a potential therapeutic strategy for the treatment of leukemia. However, a significant limitation of NF-kappaB inhibition in the treatment of leukemia is the low efficiency of this technique. NF-kappaB inhibitor treatment induces apoptosis in leukemia cells; however, it additionally causes inflammatory molecules to induce increased sensitivity of healthy hematopoietic cells to cell death signals, therefore limiting its clinical applications. Tumor necrosis factor-alpha (TNF-alpha) is a key regulator of inflammation, and induces a variety of actions in leukemic and healthy hematopoietic cells. TNF-alpha induces NF-kappaB-dependent and -independent survival signals, promoting the proliferation of leukemia cells. However, in healthy hematopoietic cells, TNF-alpha induces death signaling, an effect which is enhanced by the inhibition of NF-kappaB. Based on these observations, the present study hypothesized that inhibition of TNF-alpha signaling may be able to protect healthy hematopoietic cells and other tissue cells, while increasing the anti-leukemia effects of NF-kappaB inhibition on leukemia cells. The role and underlying molecular mechanisms of TNF-alpha inhibition in the regulation of NF-kappaB inhibition-induced apoptosis in leukemia cells was therefore investigated in the present study. The results indicated that inhibition of TNF-alpha enhanced NF-kappaB inhibition-induced apoptosis in leukemia cells. It was also revealed that protein kinase B was significant in the regulation of TNF-alpha and NF-kappaB inhibition-induced apoptosis. During this process, intrinsic apoptotic pathways were activated. A combination of NF-kappaB and TNF-alpha inhibition may be a potential specific and effective novel therapeutic strategy for the treatment of leukemia. FAU - Dong, Qiao-Mei AU - Dong QM AD - Central Laboratory, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China. FAU - Ling, Chun AU - Ling C AD - Central Laboratory, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China. FAU - Chen, Xuan AU - Chen X AD - Central Laboratory, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China. FAU - Zhao, L I AU - Zhao LI AD - Central Laboratory, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China. LA - eng PT - Journal Article DEP - 20151008 PL - Greece TA - Oncol Lett JT - Oncology letters JID - 101531236 PMC - PMC4665719 OTO - NOTNLM OT - apoptosis OT - caspase 9 OT - leukemia OT - molecular mechanism OT - nuclear factor-kappaB inhibition OT - protein kinase B OT - tumor necrosis factor alpha EDAT- 2016/01/21 06:00 MHDA- 2016/01/21 06:01 PMCR- 2015/10/08 CRDT- 2016/01/21 06:00 PHST- 2014/07/21 00:00 [received] PHST- 2015/09/14 00:00 [accepted] PHST- 2016/01/21 06:00 [entrez] PHST- 2016/01/21 06:00 [pubmed] PHST- 2016/01/21 06:01 [medline] PHST- 2015/10/08 00:00 [pmc-release] AID - OL-0-0-3786 [pii] AID - 10.3892/ol.2015.3786 [doi] PST - ppublish SO - Oncol Lett. 2015 Dec;10(6):3793-3798. doi: 10.3892/ol.2015.3786. Epub 2015 Oct 8.