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Eradication of glioblastoma, and breast and colon carcinoma xenografts by Hsp70 depletion

Item Type:Article
Title:Eradication of glioblastoma, and breast and colon carcinoma xenografts by Hsp70 depletion
Creators Name:Nylandsted, J. and Wick, W. and Hirt, U.A. and Brand, K. and Rohde, M. and Leist, M. and Weller, M. and Jaeaettelae, M.
Abstract:Heat shock protein 70 (Hsp70) is an antiapoptotic chaperone protein highly expressed in human tumors. Here we demonstrate that locoregional application of adenovirus expressing antisense Hsp70 cDNA (Ad.asHsp70) eradicates orthotopic xenografts of glioblastoma and breast carcinoma, as well as s.c. xenografts of colon carcinoma in immunodeficient mice. Ad.asHsp70-treated tumors showed massive apoptosis-like cell death and recruitment of macrophages. Human monocyte-derived macrophages effectively removed the corpses of Ad.asHsp70-treated tumor cells in vitro. Interestingly, both tumor cell death and phagocytosis were caspase-independent. Thus, Hsp70 appears as a promising target for the treatment of cancers resistant to classic caspase-mediated apoptosis.
Keywords:Adenoviridae, Antisense DNA, Apoptosis, Brain Neoplasms, Breast Neoplasms, Colonic Neoplasms, Cultured Tumor Cells, Glioblastoma, HSP70 Heat-Shock Proteins, Inbred BALB C Mice, Macrophage Activation, Macrophages, Phagocytosis, SCID Mice, Xenograft Model Antitumor Assays, Animals, Mice
Source:Cancer Research
Publisher:American Association for Cancer Research
Page Range:7139-7142
Date:15 December 2002
Official Publication:http://cancerres.aacrjournals.org/cgi/content/abstract/62/24/7139
PubMed:View item in PubMed

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