TY - JOUR
T1 - Evaluation of novel cell cycle inhibitors in mantle cell lymphoma
AU - Park, I. W.
AU - Reddy, M. V.R.
AU - Reddy, E. P.
AU - Groopman, J. E.
N1 - Funding Information:
This work was supported by a charitable contribution from Henryk and Rochelle Schwarz. E Premkumar Reddy was supported by grant CA109820.
PY - 2007/8/16
Y1 - 2007/8/16
N2 - Signature abnormalities in the cell cycle and apoptotic pathway have been identified in mantle cell lymphoma (MCL), affording the opportunity to develop targeted therapies. In this study, we tested a novel class of kinase inhibitors, styryl sulfones, which differ from prior cell cycle inhibitors in that they are not related to purines or pyrimidines. We observed that two closely related compounds, ON013100 and ON01370, altered the growth and cell cycle status of MCL lines and potently inhibited the expression of several important molecules, including cyclin-dependent kinase4, p53, mouse double minute 2 (MDM2), and cyclin D as well as increased cyclin B expression. Using both terminal deoxy transferase uridine triphosphate nick end-labelling and poly ADP-ribose polymerase assays, we found that these compounds caused apoptosis in MCL cells. In addition, using molecular analyses, we observed the modulation of caspase-3 activity but not the expression of B-cell lymphoma family molecules. Next, we investigated the cytotoxicity of the MCL lines upon treatment with styryl sulfone compounds in combination with other currently used chemotherapeutic agents, such as doxorubicin (DOX) or vincristine (VCR). We found that the combination of DOX plus styryl sulfone or VCR plus styryl sulfone increased cytotoxicity by one log scale, compared with the single styryl sulfone compound. Thus, styryl sulfones alone, or in combination with chemotherapeutic agents, present attractive opportunities for new drug development in MCL.
AB - Signature abnormalities in the cell cycle and apoptotic pathway have been identified in mantle cell lymphoma (MCL), affording the opportunity to develop targeted therapies. In this study, we tested a novel class of kinase inhibitors, styryl sulfones, which differ from prior cell cycle inhibitors in that they are not related to purines or pyrimidines. We observed that two closely related compounds, ON013100 and ON01370, altered the growth and cell cycle status of MCL lines and potently inhibited the expression of several important molecules, including cyclin-dependent kinase4, p53, mouse double minute 2 (MDM2), and cyclin D as well as increased cyclin B expression. Using both terminal deoxy transferase uridine triphosphate nick end-labelling and poly ADP-ribose polymerase assays, we found that these compounds caused apoptosis in MCL cells. In addition, using molecular analyses, we observed the modulation of caspase-3 activity but not the expression of B-cell lymphoma family molecules. Next, we investigated the cytotoxicity of the MCL lines upon treatment with styryl sulfone compounds in combination with other currently used chemotherapeutic agents, such as doxorubicin (DOX) or vincristine (VCR). We found that the combination of DOX plus styryl sulfone or VCR plus styryl sulfone increased cytotoxicity by one log scale, compared with the single styryl sulfone compound. Thus, styryl sulfones alone, or in combination with chemotherapeutic agents, present attractive opportunities for new drug development in MCL.
KW - Apoptosis
KW - Cell cycle
KW - Cytotoxicity
KW - Mantle cell lymphoma
KW - Novel sulfonyl compounds (ON013100 and ON01370)
UR - http://www.scopus.com/inward/record.url?scp=34547980839&partnerID=8YFLogxK
U2 - 10.1038/sj.onc.1210350
DO - 10.1038/sj.onc.1210350
M3 - Article
C2 - 17369860
AN - SCOPUS:34547980839
SN - 0950-9232
VL - 26
SP - 5635
EP - 5642
JO - Oncogene
JF - Oncogene
IS - 38
ER -