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Astellas Inititaties Phase 3 Registration Trial of gilteritinib (ASP2215) in Relapsed or Refractory Acute Myeloid Leukemia Patients


News provided by

Astellas Pharma Inc.

Oct 28, 2015, 08:00 ET

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Astellas is a pharmaceutical company dedicated to improving the health of people around the world
Astellas is a pharmaceutical company dedicated to improving the health of people around the world

TOKYO, Oct. 28, 2015 /PRNewswire/ -- Astellas Pharma Inc. (TSE: 4503) today announced dosing of the first patient in a randomized Phase 3 registration trial of gilteritinib (ASP2215) versus salvage chemotherapy in patients with relapsed or refractory (R/R) acute myeloid leukemia (AML). The primary endpoint of the trial is overall survival (OS).

Gilteritinibis a receptor tyrosine kinase inhibitor of FLT3 and AXL, which are involved in the growth of cancer cells. Gilteritinibhas demonstrated inhibitory activity against FLT3 internal tandem duplication (ITD) as well as tyrosine kinase domain (TKD), two common types of FLT3 mutations that are seen in up to one third of patients with AML.

The gilteritinib Phase 3 trial follows a Phase 1/2 trial, which evaluated doses from 20 to 450 mg once daily. A parallel multi-dose expansion cohort was initiated based on the efficacy seen in the dose escalation phase. Preliminary data from the Phase 1/2 trial presented at the 2015 American Society of Clinical Oncology annual meeting demonstrated a 57.5 percent overall response rate and a 47.2 percent composite Complete Response (CR) rate (CR + CR with incomplete platelet recovery + CR with incomplete hematologic recovery) in 106 patients with FLT3 mutations who received 80 mg and higher doses. Median duration of response was 18 weeks across all doses and median OS was approximately 27 weeks at 80 mg and above in FLT3 mutation positive patients. Common drug-related adverse events (> 10%) observed in the study were diarrhea (13.4%), fatigue (12.4%) and AST increase (11.3%). At the 450 mg dose, two patients reached dose-limiting toxicity (grade 3 diarrhea and ALT/AST elevation) and the maximum tolerated dose was determined to be 300 mg.

On October 27, 2015, the Japanese Ministry of Health, Labor and Welfare (MHLW) announced the selection of gilteritinib as one of the first products designated for SAKIGAKE.

About the Phase 3 Study

The Phase 3 trial is an open-label, multicenter, randomized study of gilteritinib versus salvage chemotherapy in patients with Acute Myeloid Leukemia (AML). The study will enroll 369 patients with FLT3 activating mutation in bone marrow or whole blood, as determined by central lab, AML who are refractory to or have relapsed after first-line AML therapy. Subjects will be randomized in a 2:1 ratio to receive gilteritinib (120 mg) or salvage chemotherapy consisting of LoDAC (low-dose cytarabine), azacitidine, MEC (mitoxantrone, etoposide, and intermediate-dose cytarabine), or FLAG-IDA (fludarabine, cytarabine, and granulocyte colony-stimulating factor with idarubicin). The primary endpoint of the trial is OS. For more information about this trial go to www.clinicaltrials.gov, trial identifier NCT02421939.

Gilteritinib was discovered through a research collaboration with Kotobuki Pharmaceutical Co., Ltd., and Astellas has exclusive global rights to develop, manufacture and potentially commercialize gilteritinib.

About Acute Myeloid Leukemia

Acute myeloid leukemia is a cancer that impacts the blood and bone marrow and most commonly experienced in older adults. According to the American Cancer Society, in 2015, there will be an estimated 20,830 new cases of AML diagnosed in the United States, and about 10,460 cases will result in death.

About SAKIGAKE

The SAKIGAKE designation system can shorten the review period in the following three approaches: 1.) Prioritized Consultation 2.) Substantial Pre-application Consultation and 3.) Prioritized Review.

Also, the system will promote development with the following two approaches: 4.) Review Partner System (to be conducted by the Pharmaceuticals and Medical Devices Agency) and 5.) Substantial Post-Marketing Safety Measures.

About Astellas

Astellas Pharma Inc., based in Tokyo, Japan, is a company dedicated to improving the health of people around the world through the provision of innovative and reliable pharmaceutical products. We focus on Urology, Oncology, Immunology, Nephrology and Neuroscience as prioritized therapeutic areas while advancing new therapeutic areas and discovery research leveraging new technologies/modalities. We are also creating new value by combining internal capabilities and external expertise in the medical/healthcare business. Astellas is on the forefront of healthcare change to turn innovative science into value for patients. For more information, please visit our website at www.astellas.com/en.

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SOURCE Astellas Pharma Inc.

Related Links

http://www.astellas.com/en

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