PMID- 18728964 OWN - NLM STAT- MEDLINE DCOM- 20081229 LR - 20220318 IS - 1029-2403 (Electronic) IS - 1042-8194 (Print) IS - 1026-8022 (Linking) VI - 49 IP - 10 DP - 2008 Oct TI - Growth control of multiple myeloma cells through inhibition of glycogen synthase kinase-3. PG - 1945-53 LID - 10.1080/10428190802304966 [doi] AB - Anti-apoptotic pathways play a central role in the survival of multiple myeloma cells. The contribution of PI3-kinase and Akt kinase in mediating myeloma cell survival is well established although the role of glycogen synthase kinase-3 (GSK3) is less defined. In this study we determined the contribution of GSK3 in growth regulation of myeloma cells. We treated six different multiple myeloma cell lines with a Thiadiazolidinone (TDZD), a non-competitive inhibitor of GSK3 and determined its effects on proliferation and apoptosis. In addition we determined the activation of forkhead transcription factors (FOXO) in response to TDZD. TDZD inhibited proliferation and induced apoptosis of all myeloma cell lines. TDZD was also effective in inducing apoptosis of primary myeloma cells whereas CD34 positive normal hematopoietic cells were protected from apoptosis. Furthermore, TDZD-mediated inhibition of GSK3 resulted in dephosphorylation and activation of FOXO3a. In primary myeloma cells FOXO transcription factors were highly phosphorylated where as the levels of GSK3 phosphorylation was quite low. The levels of the pro-apoptotic proteins Fas ligand (FasL) and IkappaBalpha increased after treatment with TDZD in myeloma cell lines. These studies provide the basis for further testing of GSK3 inhibitors in the clinical setting. FAU - Zhou, Ying AU - Zhou Y AD - Department of Medicine, University of Chicago, Chicago, IL 60637, USA. FAU - Uddin, Shahab AU - Uddin S FAU - Zimmerman, Todd AU - Zimmerman T FAU - Kang, Jeong-Ah AU - Kang JA FAU - Ulaszek, Jodie AU - Ulaszek J FAU - Wickrema, Amittha AU - Wickrema A LA - eng GR - R01 CA098550-04/CA/NCI NIH HHS/United States GR - R01 CA098550/CA/NCI NIH HHS/United States GR - CA98550/CA/NCI NIH HHS/United States GR - R01 CA098550-05/CA/NCI NIH HHS/United States GR - R01 CA098550-02/CA/NCI NIH HHS/United States GR - R01 CA098550-01A1/CA/NCI NIH HHS/United States GR - R01 CA098550-03/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PL - United States TA - Leuk Lymphoma JT - Leukemia & lymphoma JID - 9007422 RN - 0 (4-benzyl-2-methyl-1,2,4-thiadiazolidine-3,5-dione) RN - 0 (FOXO3 protein, human) RN - 0 (Fas Ligand Protein) RN - 0 (Forkhead Box Protein O3) RN - 0 (Forkhead Transcription Factors) RN - 0 (I-kappa B Proteins) RN - 0 (NFKBIA protein, human) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Thiadiazoles) RN - 139874-52-5 (NF-KappaB Inhibitor alpha) RN - EC 2.7.11.26 (Glycogen Synthase Kinase 3) SB - IM MH - Apoptosis/drug effects MH - Cell Line, Tumor MH - Cell Proliferation/*drug effects MH - Fas Ligand Protein/analysis MH - Forkhead Box Protein O3 MH - Forkhead Transcription Factors/metabolism MH - Glycogen Synthase Kinase 3/*antagonists & inhibitors MH - Humans MH - I-kappa B Proteins/analysis MH - Multiple Myeloma/drug therapy/*pathology MH - NF-KappaB Inhibitor alpha MH - Protein Kinase Inhibitors/*pharmacology MH - Thiadiazoles/pharmacology PMC - PMC2574790 MID - NIHMS65653 EDAT- 2008/08/30 09:00 MHDA- 2008/12/30 09:00 PMCR- 2009/09/01 CRDT- 2008/08/30 09:00 PHST- 2008/08/30 09:00 [pubmed] PHST- 2008/12/30 09:00 [medline] PHST- 2008/08/30 09:00 [entrez] PHST- 2009/09/01 00:00 [pmc-release] AID - 901924027 [pii] AID - 10.1080/10428190802304966 [doi] PST - ppublish SO - Leuk Lymphoma. 2008 Oct;49(10):1945-53. doi: 10.1080/10428190802304966.