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February 24, 2014
07:33 EDTSNTASynta Pharmaceuticals reports on progress with lead HDC compounds
Synta Pharmaceuticals reported on progress with lead compounds from its Hsp90-Inhibitor Drug Conjugate platform at the IASLC 14th Annual Targeted Therapies of the Treatment of Lung Cancer Meeting in Santa Monica, California. The new compounds, consisting of an Hsp90-inhibitor conjugated with SN-38 and an Hsp90-inhibitor conjugated with docetaxel, demonstrated proof of principle in multiple preclinical cancer models. Notably, complete or near complete regressions of tumors were observed in models of non-small cell lung cancer, small-cell lung cancer, breast cancer, pancreatic cancer, colon cancer, and skin cancer, in models that are generally resistant or show limited response to treatment with the unconjugated chemotherapies. Results were presented by Dr. David Gerber of UT Southwestern Medical Center. Results presented at the conference showed that up to seven times greater dosage of docetaxel may be safely administered in the animal models compared to unconjugated docetaxel. This increase was associated with near complete regressions in animals treated with the HDC vs. limited activity or progressive disease in animals treated with unconjugated docetaxel. Preclinical safety results to date show comparable or more favorable safety profile of the HDC as compared with the unconjugated chemotherapy. In addition, both the SN-38 and docetaxel HDCs demonstrated prolonged anti-tumor activity following the last dose of the HDC. These results are consistent with retention of the HDC in tumors and sustained, slow release of the cytotoxic payload within the tumor.
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November 19, 2014
07:04 EDTSNTASynta Pharmaceuticals presents preclinical results from Hsp90 platform
Synta Pharmaceuticals announced that a poster highlighting preclinical results from its Hsp90 inhibitor Drug Conjugate platform is being presented at the 26th EORTC-NCI-AACR Symposium in Barcelona. “This poster highlights our ongoing evaluation of multiple candidates from the HDC platform. The preclinical results for our lead candidates not only demonstrate broad activity across several tumor types, but also the ability for HDCs to induce prolonged antitumor effects as compared to well-established cytotoxic agents,” said Weiwen Ying, Vice President, Discovery Chemistry at Synta. “In addition, the platform is not limited to using traditional cytotoxic therapeutics as payloads. A number of commonly used small molecule anticancer agents may also be incorporated, including tyrosine kinase inhibitors, proteosome inhibitors, small molecule immunotherapeutics, and other molecularly targeted agents. By leveraging the preferential retention characteristic of the Hsp90 targeting arm of an HDC in tumors, intratumoral exposure and antitumor potency for a wide array of payloads can be potentially improved." "We are encouraged by the progress the team has achieved to date with candidates arising from the HDC platform and the promise that the platform holds for both internal development and partnerships,” said Anne Whitaker, President and CEO of Synta. “We continue to evaluate options for efficiently advancing candidates from this platform and look forward to providing updates in the future.”

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