Mevalonate pathway inhibitors affect anticancer drug-induced cell death and DNA damage response of human sarcoma cells

TY - JOUR

T1 - Mevalonate pathway inhibitors affect anticancer drug-induced cell death and DNA damage response of human sarcoma cells

AU - Nilsson, S

AU - Huelsenbeck, J

AU - Fritz, G

N1 - Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

PY - 2011/5/1

Y1 - 2011/5/1

N2 - Lovastatin (Lov), bisphosphonates (BP) and metformin (Met) are widely used drugs, having in common that they interfere with the mevalonate pathway (MP). The MP generates isoprene moieties required for the function of regulatory GTPases controlling cell proliferation and survival. Here, we addressed the question whether MP inhibitors interfere with the anti-tumor efficacy of anticancer drugs. We comparatively analyzed the effect of equitoxic doses of Lov, BP and Met on cell viability, cell cycle progression, apoptosis and DNA damage response (DDR) of human osteo- and fibrosarcoma cells exposed to doxorubicin or cisplatin. We found that Lov, BP and Met modulated the anticancer drug sensitivity of sarcoma cells in an agent-, dose and time-dependent fashion. Mostly, the MP inhibitors increased the cytotoxicity of the anticancer drugs in an additive manner. MP modulators differed from each other regarding their impact on anticancer drug-induced DNA damage response as measured by the phosphorylation status of SAPK/JNK, Chk-1 and H2AX as well as p53 protein level. In this regard, lovastatin and metformin turned out as the most effective inhibitory drugs. The data show that MP inhibitors can affect the anti-tumor efficacy of anticancer drugs and impact the DDR of human sarcoma cells.

AB - Lovastatin (Lov), bisphosphonates (BP) and metformin (Met) are widely used drugs, having in common that they interfere with the mevalonate pathway (MP). The MP generates isoprene moieties required for the function of regulatory GTPases controlling cell proliferation and survival. Here, we addressed the question whether MP inhibitors interfere with the anti-tumor efficacy of anticancer drugs. We comparatively analyzed the effect of equitoxic doses of Lov, BP and Met on cell viability, cell cycle progression, apoptosis and DNA damage response (DDR) of human osteo- and fibrosarcoma cells exposed to doxorubicin or cisplatin. We found that Lov, BP and Met modulated the anticancer drug sensitivity of sarcoma cells in an agent-, dose and time-dependent fashion. Mostly, the MP inhibitors increased the cytotoxicity of the anticancer drugs in an additive manner. MP modulators differed from each other regarding their impact on anticancer drug-induced DNA damage response as measured by the phosphorylation status of SAPK/JNK, Chk-1 and H2AX as well as p53 protein level. In this regard, lovastatin and metformin turned out as the most effective inhibitory drugs. The data show that MP inhibitors can affect the anti-tumor efficacy of anticancer drugs and impact the DDR of human sarcoma cells.

KW - Antineoplastic Agents/pharmacology

KW - Apoptosis/drug effects

KW - Blotting, Western

KW - Bone Neoplasms/drug therapy

KW - Cell Cycle/drug effects

KW - Cell Proliferation/drug effects

KW - Cisplatin/pharmacology

KW - DNA Damage/drug effects

KW - Diphosphonates/pharmacology

KW - Doxorubicin/pharmacology

KW - Fibrosarcoma/drug therapy

KW - Humans

KW - Lovastatin/pharmacology

KW - Metformin/pharmacology

KW - Mevalonic Acid/antagonists & inhibitors

KW - Osteosarcoma/drug therapy

KW - Phosphorylation/drug effects

KW - RNA, Messenger/genetics

KW - Reverse Transcriptase Polymerase Chain Reaction

KW - Signal Transduction/drug effects

KW - Tumor Cells, Cultured

KW - Tumor Suppressor Protein p53/genetics

U2 - 10.1016/j.canlet.2010.12.022

DO - 10.1016/j.canlet.2010.12.022

M3 - SCORING: Journal article

C2 - 21356574

VL - 304

SP - 60

EP - 69

JO - CANCER LETT

JF - CANCER LETT

SN - 0304-3835

IS - 1

ER -