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Advancing Stem Cell Gene Therapy

Date:
December 16, 2007
Source:
University Hospitals of Cleveland
Summary:
Researchers recently made great strides in stem cell gene therapy research by transferring a new gene to cancer patients, via their own stem cells, with the ultimate goal of being able to use stronger chemotherapy treatment with less severe side effects. This is the first time selection of this gene has been shown to occur in patients.

Ireland Cancer Center of University Hospitals Case Medical Center researchers have recently made great strides in stem cell gene therapy research by transferring a new gene to cancer patients, via their own stem cells, with the ultimate goal of being able to use stronger chemotherapy treatment with less severe side effects. Under this protocol, MGMT, a drug-resistance gene, is added into purified hematopoietic stem cells to protect these cells from the damage of chemotherapy regimens.

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In a presentation by Ireland Cancer Center researchers at the annual American Society of Hematology meeting, Stanton Gerson, MD, and colleagues presented that eight patients were enrolled on the trial and six were infused with their own stem cells which were engineered to carry the MGMT gene. In three patients, stem cells carrying the gene were identified in their blood or bone marrow. In one patient, stem cells carrying the gene were detected up to 28 weeks after their administration. This significant finding has never been reported before with this gene and drug combination.

'This study is the first to show the success of treatment with evidence that stem cells now carry the new gene,'¨ says Dr. Gerson, Director of the Ireland Cancer Center and Case Comprehensive Cancer Center, who spearheaded the Phase I study along with a team of researchers. 'These patients show the success of treatment with evidence that their stem cells now carry the new genes. This is a breakthrough -- the first time selection with MGMT has been shown to occur in patients.'¨

Preclinical animal research, conducted by Dr. Gerson and his colleagues, has shown that the gene G156A-MGMT can provide stem cells with very high levels of drug resistance, compared to normal stem cells not carrying the gene. In the Phase I trial for patients with advanced malignancies, researchers collected peripheral blood stem cells from patients and exposed them to a retrovirus containing the G156A-MGMT gene.



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The above story is based on materials provided by University Hospitals of Cleveland. Note: Materials may be edited for content and length.


Cite This Page:

University Hospitals of Cleveland. "Advancing Stem Cell Gene Therapy." ScienceDaily. ScienceDaily, 16 December 2007. <www.sciencedaily.com/releases/2007/12/071212201306.htm>.
University Hospitals of Cleveland. (2007, December 16). Advancing Stem Cell Gene Therapy. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2007/12/071212201306.htm
University Hospitals of Cleveland. "Advancing Stem Cell Gene Therapy." ScienceDaily. www.sciencedaily.com/releases/2007/12/071212201306.htm (accessed November 26, 2014).

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