"Dear Mr.....
thanks so much for the questions. I was not aware of the report you forwarded. Some of the statements in the report are correct and some are incorrect. The results of this trial are highly technical and subject to interpretation. I cannot provide a detailed analysis of the issues because doing so would involve the disclosure of non-public information. This Phase 2 study has been reported on extensively and was the subject of at least one peer-reviewed article. I have pasted below a paragraph from our Annual Report on Form 20-F that describes the Phase 2 study and the conclusions that we drew from it. We believe that this disclosure is accurate and complete.
On September 14, 2011, Prof. Emons [Prof. Günter Emons, M.D., Chairman of the Department of Obstetrics & Gynecology at the University of Göttingen, Germany] presented positive final Phase 2 efficacy and safety data for zoptarelin doxorubicin in advanced endometrial cancer at the European Society of Gynecological Oncology in Milan, Italy. The results of the study were published in an article by Prof. Emons, et al. in the journal Gynecologic Oncology (Gynecol.Oncol. (2014) 24:260). The study involved 43 patients with LHRH positive advanced or recurrent endometrial cancer. Patients received Zoptrex™ at a dose of 267 mg/m2 by intravenous infusion, with retreatment every three weeks, for up to six courses. Response rate per RECIST [Response Evaluation Criteria in Solid Tumors] was defined as the primary endpoint. Secondary endpoints were safety, TTP [time to progression] and OS [overall survival]. The responses, as confirmed by independent review, included two patients with complete response (5%), eight patients with PR [partial response] (18%) and 20 patients with stable disease (“SD”) (47%). Based on such data, the estimated overall response rate (“ORR”) (ORR=CR+PR) was 23% and the CBR [Clinical Benefit Ratio] was 70%. Responses were also achieved in patients with prior chemotherapy - two PR and three SD in eight of the patients pre-treated with platinum/taxane regimens. Median TTP and OS were seven months (30 weeks) and 14.9 months (62 weeks), respectively. Prof. Emons concluded as follows: (i) Zoptrex™ was efficacious and well tolerated in patients with advanced endometrial cancer; (ii) the safety profile confirmed the dose of 267 mg/m2; (iii) hematological toxicity was rapidly reversible; (iv) non-hematological toxicities were usually not severe, causing few deviations from scheduled treatment; (v) no cardiotoxic events were observed; (vi) the ORR of 23% compares well with those of single-agent platinum or taxane treatment; (vii) responders included patients pre-treated with platinum/taxane combination; (viii) in addition, the rate of SD was 47%, resulting in a CBR of 70%; and (ix) the OS after single agent Zoptrex™ was similar to that reported for modern triple combination chemotherapy, but was achieved with lower toxicity.
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