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First proof in patients of an improved 'magic bullet' for cancer detection and radio-therapy
Date:9/12/2011

973, when a team of Salk researchers, which included Drs. Brazeau, Vale, Burgus, Rivier, and Roger Guillemin, a 1977 Nobel laureate, isolated and characterized somatostatin, a peptide produced by neuroendocrine glands. The scientists found that the normal function of somatostatin is to block the release of growth hormone throughout the body, which includes inhibiting the release of thyroid-stimulating hormone (TSH) from the thyroid.

Drs. Rivier, Reubi and their colleagues from Germany showed that 111In-DOTA-BASS bound to a greater number of somatostatin receptors on cancer cells than the agonist OctreoScan, and that it did accumulate in normal tissue (liver and kidney) to a lesser extent.

The prototype antagonist therapy has been revamped, and the version studied in the Journal of Nuclear Medicine publication, 111In-DOTA-BASS, detected 25 of 28 metastatic neuroendocrine tumors in the patients, whereas OctreoScan detected only 17.

In-DOTA-BASS has been licensed to a pharmaceutical company for clinical trial development, according to Rivier, who adds that other researchers are exploring an antagonist approach for other G-protein coupled receptors that are abundantly expressed on cancer cells.


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Contact: Andy Hoang
Ahoang@salk.edu
619-861-5811
Salk Institute
Source:Eurekalert

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