On February 27, 2018 Actinium Pharmaceuticals, Inc. (NYSE American:ATNM) ("Actinium" or "the Company"), reported that the Company has successfully activated sixteen clinical trial sites in the pivotal Phase 3 SIERRA (Study of Iomab-B in Elderly Relapsed or Refractory Acute Myeloid Leukemia) trial (Press release, Actinium Pharmaceuticals, FEB 27, 2018, View Source [SID1234524189]). The SIERRA trial is planned to enroll 150 patients with relapsed or refractory acute myeloid leukemia (AML) who are age 55 and above and will compare Iomab-B and a BMT to physician’s choice of salvage chemotherapy. The primary endpoint is durable complete remission (dCR) of at least six months. Iomab-B is intended to provide safer myeloablation of the bone marrow prior to a bone marrow transplant, thus providing a potentially curative treatment option for this patient population and for patients with other leukemias, lymphomas, myelomas and other blood disorders.
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With Stony Brook, New York-based Stony Book University, the sixteen clinical trial sites in the Phase 3 SIERRA trial represent over one-third of bone marrow transplant volume in the U.S., which bodes well for reaching the 150-patient enrollment goal. The following medical institutions are clinical trial sites in the Iomab-B Phase 3 clinical trials:
Center Location
MD Anderson Cancer Center Houston, Texas
Memorial Sloan Kettering Cancer Center New York, New York
Mayo Clinic Rochester, Minnesota
Mayo Clinic Jacksonville, Florida
Washington University School of Medicine Saint Louis, Missouri
Yale Cancer Center New Haven, Connecticut
Baylor Charles A. Sammons Cancer Center Dallas, Texas
The University of Kansas Cancer Center Westwood, Kansas
Roswell Park Cancer Institute Buffalo, New York
University Hospitals Cleveland Medical Center Cleveland, Ohio
The Ohio State University Comprehensive Cancer Center Columbus, Ohio
Penn State Hershey Cancer Institute Hershey, Pennsylvania
Loyola University Medical Center Maywood, Illinois
Banner MD Anderson Cancer Center Gilbert, Arizona
Fred Hutchinson Cancer Research Center Seattle, Washington
Stony Book University Stony Brook, New York
Dr. Mark Berger, Actinium’s Chief Medical Officer said, "We are optimistic that working with these renowned scientific institutions will move Iomab-B closer to realization as an accepted treatment to improve the therapy and prospects of bone marrow transplant patients."
Actinium also announced that it expects to provide updates on the Iomab-B SIERRA trial in line with previously stated objectives for 2018 and 2019. The SIERRA trial will have three safety analyses by an independent Data Monitoring Committee when 25%, 50% and 75% patient enrollment has been reached. Also, two ad-hoc efficacy analyses may be requested by Actinium after 70 and/or 110 patients have engrafted and given enough time to achieve the primary endpoint of durable complete remission at six months post-treatment.
Sandesh Seth, Actinium’s Chairman and CEO said, "Participation of these leading U.S. transplant centers are in the SIERRA trial reflects strongly on the prospects for our leading drug candidate, Iomab-b. We expect to provide several enrollment and Data Monitoring Safety Board related updates during 2018 and topline results next year and believe we are making solid progress toward meeting these goals with the addition of additional sites and participation of these prestigious institutions."
About Iomab-B
Iomab-B is Actinium’s lead product candidate that is currently being studied in a 150-patient, multicenter pivotal Phase 3 clinical trial in patients with relapsed or refractory acute myeloid leukemia who are age 55 and above. Upon approval, Iomab-B is intended to prepare and condition patients for a bone marrow transplant, also referred to as a hematopoietic stem cell transplant, which is often considered the only potential cure for patients with certain blood-borne cancers and blood disorders. Iomab-B targets cells that express CD45, a pan-leukocytic antigen widely expressed on white blood cells with the monoclonal antibody, BC8, labeled with the radioisotope, iodine-131. By carrying iodine-131 directly to the bone marrow in a targeted manner, Actinium believes Iomab-B will avoid the side effects of radiation on most healthy tissues while effectively killing the patient’s cancer and marrow cells. In a Phase 2 clinical study in 68 patients with advanced AML or high-risk myelodysplastic syndrome (MDS) age 50 and older, Iomab-B produced complete remissions in 100% of patients and patients experienced transplant engraftment at day 28. Iomab-B was developed at the Fred Hutchinson Cancer Research Center where it has been studied in almost 300 patients in a number of blood cancer indications, including acute myeloid leukemia (AML), chronic myeloid leukemia (CML), acute lymphoblastic leukemia (ALL), chronic lymphocytic leukemia (CLL), Hodgkin’s disease (HD), Non-Hodgkin lymphomas (NHL) and multiple myeloma (MM). Iomab-B has been granted Orphan Drug Designation for relapsed or refractory AML in patients 55 and above by the U.S. Food and Drug Administration and the European Medicines Agency.