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Gene therapy for metastatic melanoma in mice produces complete remission
Date:11/18/2010

INDIANAPOLIS A potent anti-tumor gene introduced into mice with metastatic melanoma has resulted in permanent immune reconfiguration and produced a complete remission of their cancer, according to an article to be published in the December 2010 issue of the Journal of Clinical Investigation. The online version is now available.

Indiana University School of Medicine researchers used a modified lentivirus to introduce a potent anti-melanoma T cell receptor gene into the hematopoietic stem cells of mice. Hematopoietic stem cells are the bone marrow cells that produce all blood and immune system cells.

The T cell gene, which recognizes a specific protein found on the surface of melanoma, was isolated and cloned from a patient with melanoma. The gene-modified stems cells were then transplanted back into hosts and found to eradicate metastatic melanoma for the lifetime of the mice.

"We found that the transplantation of gene-modified hematopoietic stem cells results in a new host immune system and the complete elimination of tumor," reported Christopher E. Touloukian, M.D., an assistant professor of surgery and immunology at the IU School of Medicine and a member of the Indiana University Melvin and Bren Simon Cancer Center. "To date, cancer immunotherapies have been hampered by limited and diminishing immune responses over time. We believe this type of translational model opens new doors for patients with melanoma and potentially other cancers by taking advantage of the potent regenerative capacity of hematopoietic stem cells and new advances in gene therapy."

This research was funded by a National Institutes of Health grant.

It has paved the way for a new clinical trial in humans funded by the V Foundation for Cancer Research. The pilot phase I trial will involve treatment of 12 patients and focus primarily on the safety and efficacy of the therapy, said Dr. Touloukian, who is the senior author on the JCI pa
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Contact: Mary L. Hardin
mhardin@iupui.edu
317-274-7722
Indiana University School of Medicine
Source:Eurekalert  

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