PMID- 21475253 OWN - NLM STAT- MEDLINE DCOM- 20110916 LR - 20211203 IS - 1476-5551 (Electronic) IS - 0887-6924 (Linking) VI - 25 IP - 7 DP - 2011 Jul TI - The serine/threonine kinase Pim-2 is a novel anti-apoptotic mediator in myeloma cells. PG - 1182-8 LID - 10.1038/leu.2011.60 [doi] AB - Bone marrow stromal cells (BMSCs) and osteoclasts (OCs) confer multiple myeloma (MM) cell survival through elaborating factors. We demonstrate herein that IL-6 and TNF family cytokines, TNFalpha, BAFF and APRIL, but not IGF-1 cooperatively enhance the expression of the serine/threonine kinase Pim-2 in MM cells. BMSCs and OCs upregulate Pim-2 expression in MM cells largely via the IL-6/STAT3 and NF-kappaB pathway, respectively. Pim-2 short interfering RNA reduces MM cell viability in cocultures with BMSCs or OCs. Thus, upregulation of Pim-2 appears to be a novel anti-apoptotic mechanism for MM cell survival. Interestingly, the mammalian target of rapamycin inhibitor rapamycin further suppresses the MM cell viability in combination with the Pim-2 silencing. The Pim inhibitor (Z)-5-(4-propoxybenzylidene) thiazolidine-2, 4-dione and the PI3K inhibitor LY294002 cooperatively enhance MM cell death. The Pim inhibitor suppresses 4E-BP1 phosphorylation along with the reduction of Mcl-1 and c-Myc. Pim-2 may therefore become a new target for MM treatment. FAU - Asano, J AU - Asano J AD - Department of Medicine and Bioregulatory Sciences, University of Tokushima Graduate School of Medicine, Tokushima, Japan. FAU - Nakano, A AU - Nakano A FAU - Oda, A AU - Oda A FAU - Amou, H AU - Amou H FAU - Hiasa, M AU - Hiasa M FAU - Takeuchi, K AU - Takeuchi K FAU - Miki, H AU - Miki H FAU - Nakamura, S AU - Nakamura S FAU - Harada, T AU - Harada T FAU - Fujii, S AU - Fujii S FAU - Kagawa, K AU - Kagawa K FAU - Endo, I AU - Endo I FAU - Yata, K AU - Yata K FAU - Sakai, A AU - Sakai A FAU - Ozaki, S AU - Ozaki S FAU - Matsumoto, T AU - Matsumoto T FAU - Abe, M AU - Abe M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110408 PL - England TA - Leukemia JT - Leukemia JID - 8704895 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (Cell Cycle Proteins) RN - 0 (Chromones) RN - 0 (EIF4EBP1 protein, human) RN - 0 (IL6 protein, human) RN - 0 (Interleukin-6) RN - 0 (MYC protein, human) RN - 0 (Morpholines) RN - 0 (Myeloid Cell Leukemia Sequence 1 Protein) RN - 0 (NF-kappa B) RN - 0 (Neoplasm Proteins) RN - 0 (PIM2 protein, human) RN - 0 (Phosphoproteins) RN - 0 (Proto-Oncogene Proteins) RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (Proto-Oncogene Proteins c-myc) RN - 0 (RNA, Small Interfering) RN - 0 (STAT3 Transcription Factor) RN - 0 (STAT3 protein, human) RN - 31M2U1DVID (2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Adaptor Proteins, Signal Transducing/metabolism MH - Apoptosis/drug effects/*physiology MH - Apoptosis Regulatory Proteins/biosynthesis/genetics/*physiology MH - Cell Cycle Proteins MH - Cell Differentiation/drug effects MH - Cell Line MH - Chromones/pharmacology MH - Gene Expression Regulation, Neoplastic/drug effects MH - Humans MH - Interleukin-6/metabolism MH - Morpholines/pharmacology MH - Multiple Myeloma/*enzymology/pathology MH - Myeloid Cell Leukemia Sequence 1 Protein MH - NF-kappa B/metabolism MH - Neoplasm Proteins/biosynthesis/genetics/*physiology MH - Osteoclasts/drug effects/enzymology MH - Phosphoproteins/metabolism MH - Phosphorylation/drug effects MH - Protein Processing, Post-Translational/drug effects MH - Protein Serine-Threonine Kinases/biosynthesis/genetics/*physiology MH - Proto-Oncogene Proteins/biosynthesis/genetics/*physiology MH - Proto-Oncogene Proteins c-bcl-2/metabolism MH - Proto-Oncogene Proteins c-myc/metabolism MH - RNA Interference MH - RNA, Small Interfering/genetics/pharmacology MH - STAT3 Transcription Factor/metabolism MH - Signal Transduction/drug effects/physiology MH - Sirolimus/pharmacology MH - Stromal Cells/drug effects/enzymology MH - Transfection MH - Tumor Cells, Cultured/drug effects/metabolism EDAT- 2011/04/09 06:00 MHDA- 2011/09/17 06:00 CRDT- 2011/04/09 06:00 PHST- 2011/04/09 06:00 [entrez] PHST- 2011/04/09 06:00 [pubmed] PHST- 2011/09/17 06:00 [medline] AID - leu201160 [pii] AID - 10.1038/leu.2011.60 [doi] PST - ppublish SO - Leukemia. 2011 Jul;25(7):1182-8. doi: 10.1038/leu.2011.60. Epub 2011 Apr 8.