Actinium Pharma Reports Trial Results for Actimab-A Presented at ASH

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Actinium Pharmaceuticals, Inc.
ATNM
("Actinium" or "the Company"), is a biopharmaceutical company developing innovative targeted payload immunotherapeutics for the treatment of advanced cancers. Actinium announced today that Dr. Joseph Jurcic of Columbia University Medical Center presented data from the Phase 1 portion of the Company's Actimab-A Phase 1/2 clinical trial. The data were presented in a poster session at the 57th American Society of Hematology (ASH) Annual Meeting currently ongoing in Orlando, FL. Actimab-A is being studied in Acute Myeloid Leukemia (AML) patients over the age of 60 that have not received prior therapy and have declined or are unsuitable for intensive induction chemotherapy. In total, 14 patients, who had median CD33 expression of 81%, were treated in four cohorts at escalating doses of 0.5 microcuries per kilogram (µCi/kg), 1.0 µCi/kg, 1.5 µCi/kg and 2.0 µCi/kg. After cycle 1, eight of eleven patients (73%) evaluated had mean bone marrow blast reduction of 72%. Objective responses were seen in four of fourteen patients (29%) after one cycle of therapy with one patient achieving complete remission, two patients achieving complete remission with incomplete platelet count recovery and one patient achieving complete remission with incomplete blood count recovery. "The rate of remission and tolerability results seen with Actimab-A in this trial are very encouraging, as elderly patients diagnosed with AML have limited options and prognosis is typically poor," stated Dr. Joseph Jurcic, study investigator at Columbia University Medical Center. "I look forward to continuing to dose Actimab-A in a greater number of patients in the next segment of the Phase 1/2 clinical trial to evaluate the full potential of this therapy." "These latest data from our CD33 targeting program provide yet another validation for our approach of utilizing targeted alpha-emitters in older high risk AML patients, an area of high unmet medical need. We have seen utility of our platform with the first generation CD33-Bismuth-213 construct in previous trials, and our next generation CD33-Actinium-225 labeled product is providing all the additional advantages we have expected. This enhances our confidence in Actimab-A's potential" said Dr. Dragan Cicic, Chief Medical Officer of Actinium Pharmaceuticals. "Based on the strong responses and safety data seen with doses of Acitimab-A above 1 µCi/kg, we are moving towards the Phase 2 portion of the trial so that this important therapeutic option can be made available to patients as quickly as possible."
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