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Studies from Oklahoma State University Have Provided New Data on Cancer Gene Therapy (SHetA2 interference with mortalin binding to p66shc and p53...

July 14, 2014



Studies from Oklahoma State University Have Provided New Data on Cancer Gene Therapy (SHetA2 interference with mortalin binding to p66shc and p53 identified using drug-conjugated magnetic microspheres)

By a News Reporter-Staff News Editor at Cancer Gene Therapy Week -- Current study results on Biotechnology have been published. According to news reporting out of Stillwater, Oklahoma, by NewsRx editors, research stated, "SHetA2 is a small molecule flexible heteroarotinoid (Flex-Het) with promising cancer prevention and therapeutic activity. Extensive preclinical testing documented lack of SHetA2 toxicity at doses 25 to 150 fold above effective doses."

Our news journalists obtained a quote from the research from Oklahoma State University, "Knowledge of the SHetA2 molecular target(s) that mediate(s) the mechanism of SHetA2 action is critical to appropriate design of clinical trials and improved analogs. The aim of this study was to develop a method to identify SHetA2 binding proteins in cancer cells. A known metabolite of SHetA2 that has a hydroxyl group available for attachment was synthesized and conjugated to a linker for attachment to a magnetic microsphere. SHetA2-conjugated magnetic microspheres and unconjugated magnetic microspheres were separately incubated with aliquots of a whole cell protein extract from the A2780 human ovarian cancer cell line. After washing away non-specifically bound proteins with the protein extraction buffer, SHetA2-binding proteins were eluted with an excess of free SHetA2. In two independent experiments, an SDS gel band of about 72 kDa was present at differential levels in wells of eluent from SHetA2-microspheres in comparison to wells of eluent from unconjugated microspheres. Mass spectrometry analysis of the bands (QStar) and straight eluents (Orbitrap) identified mortalin (HSPA9) to be present in the eluent from SHetA2-microspheres and not in eluent from unconjugated microspheres. Co-immunoprecipitation experiments demonstrated that SHetA2 interfered with mortalin binding to p53 and p66 Src homologous-collagen homologue (p66shc) inside cancer cells. Mortalin and SHetA2 conflictingly regulate the same molecules involved in mitochondria-mediated intrinsic apoptosis."

According to the news editors, the research concluded: "The results validate the power of this protocol for revealing drug targets."

For more information on this research see: SHetA2 interference with mortalin binding to p66shc and p53 identified using drug-conjugated magnetic microspheres. Investigational New Drugs, 2014;32(3):412-423. Investigational New Drugs can be contacted at: Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands. (Springer - www.springer.com; Investigational New Drugs - www.springerlink.com/content/0167-6997/)

Our news journalists report that additional information may be obtained by contacting D.M. Benbrook, Oklahoma State University, Dept. of Chem, Stillwater, OK 74078, United States. Additional authors for this research include B. Nammalwar, A. Long, H. Matsumoto, A. Singh, R.A. Bunce and K.D. Berlin (see also Biotechnology).

Keywords for this news article include: Biotechnology, Oklahoma, Genetics, Oncology, p53 Gene, Stillwater, United States, Cancer Gene Therapy, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Cancer Gene Therapy Week


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