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Gene therapy kills breast cancer stem cells, boosts chemotherapy
Date:9/12/2011

periments, the CMV-BikDD also invaded and destroyed normal cells, while the VISA-Claudin4-BikDD did not.

Agent energizes lapatinib, other drugs

BikDD made HER2-positive breast cancer cells more sensitive to lapatinib when all three Bcl-2 proteins were inhibited but not when they were inhibited separately. HER2-positive breast cancer is a particularly aggressive type that makes too much human epidermal growth factor 2; it accounts for about 20 percent of breast cancers. BikDD also sensitized EGFR+ (epidermal growth factor positive) breast cancer cells to lapatinib and several other breast cancer cells lines to paclitaxel.

Moving discovery forward

Hung said this approach is promising for breast cancer treatment, especially recurrent disease.

"VISA-claudin4-BikDD gene therapy may provide an effective strategy to inhibit breast tumor growth," he said. "It demonstrates virtually no toxicity in normal cells and produces a profound killing effect in multiple breast cancer cell lines and synergy with other agents."

Hung said the next step is to move VISA-claudin4-BikDD into a Phase I clinical trial to test its effect on patients with breast cancer.


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Contact: Scott Merville
smerville@comcast.net
713-792-0661
University of Texas M. D. Anderson Cancer Center
Source:Eurekalert

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