Effective combination therapy for malignant glioma with TRAIL-secreting mesenchymal stem cells and lipoxygenase inhibitor MK886.

Abstract

The apoptotic ligand TRAIL is believed to have promise as a cancer gene therapy, yet many types of cancer, including gliomas, have exhibited resistance to TRAIL-induced apoptosis. Here, we show that therapeutic combination of the lipoxygenase inhibitor MK886 and TRAIL-secreting human mesenchymal stem cells (MSC-TRAIL) provide targeted and prolonged delivery of TRAIL both in vitro and in orthotopic mouse models of glioma. Treatment of either TRAIL-sensitive or TRAIL-resistant human glioma cells with MK886 and MSC-TRAIL resulted in significantly enhanced apoptosis compared with each agent alone. MK886 effectively increased the sensitivity to TRAIL-induced apoptosis via upregulation of the death receptor 5 and downregulation of the antiapoptotic protein survivin in human glioma cell lines and in primary glioma cells. This regulation was accompanied by a substantial increase in caspase activation after combined treatment. Furthermore, in vivo survival experiments and imaging analysis in orthotopic xenografted mice showed that MSC-based TRAIL gene delivery combined with MK886 into the tumors had greater therapeutic efficacy than single-agent treatment. Together, our findings indicate that MK886 combined with MSC-based TRAIL gene delivery may represent a novel strategy for improving the treatment of malignant gliomas.

• Authors: Seong Muk Kim, Ji Sun Woo, Chang Hyun Jeong, Chung Heon Ryu, Jung Yeon Lim, Sin-Soo Jeun
• Journal: Cancer research (Cancer Res) Vol. 72 Issue 18 Pg. 4807-17 (Sep 15 2012) ISSN: 1538-7445 [Electronic] United States
• PMID: 22962275 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antineoplastic Agents
• Indoles
• RNA, Small Interfering
• TNF-Related Apoptosis-Inducing Ligand
• MK-886

Topics

• Animals
• Antineoplastic Agents (administration & dosage)
• Blotting, Western
• Brain Neoplasms (drug therapy, metabolism)
• Cell Line, Tumor
• Combined Modality Therapy
• Flow Cytometry
• Genetic Therapy (methods)
• Glioma (drug therapy, metabolism)
• Humans
• Immunohistochemistry
• Indoles (administration & dosage)
• Male
• Mesenchymal Stem Cell Transplantation (methods)
• Mesenchymal Stem Cells (metabolism)
• Mice
• Mice, Nude
• RNA, Small Interfering
• TNF-Related Apoptosis-Inducing Ligand (metabolism)
• Transfection
• Xenograft Model Antitumor Assays