August, 14, 2017

Cambridge, MA — H3 Biomedicine Inc., a clinical stage biopharmaceutical company specializing in the discovery and development of precision medicines for oncology and a member of Eisai’s global Oncology Business Group, today announced that the U.S. Food and Drug Administration (FDA) has granted the company an orphan drug designation for H3B-8800, its lead clinical compound for the treatment of patients with Acute Myelogenous Leukemia (AML) and Chronic Myelomonocytic Leukemia (CMML). H3B-8800, which is a potent, selective and orally bioavailable small molecule modulator of wild-type and mutant SF3b complexes, is currently in Phase 1 clinical trials.

“Receiving the orphan drug designation for H3B-8800 is a critical milestone for H3’s ongoing cancer genomics driven drug discovery program,” said Markus Warmuth, M.D., President and CEO of H3 Biomedicine. “We are pleased with the progress our scientific and clinical teams are making, and look forward to continue investigating H3B-8800 as a potential treatment option for patients with these diseases.”

The FDA’s Office of Orphan Drug Products grants orphan status to support development of medicines for rare diseases or conditions that affect fewer than 200,000 people in the U.S. The orphan drug designation provides H3 Biomedicine with certain benefits, including market exclusivity upon regulatory approval if received, exemption of FDA application fees and tax credits for qualified clinical trials.

About Acute Myelogenous Leukemia (AML)

According to the American Cancer Society, acute myeloid leukemia (AML) is also called acute myelocytic leukemia, acute myelogenous leukemia, acute granulocytic leukemia, acute non-lymphocytic leukemia, or sometimes just AML. It is most common in older people. For more information, please visit

About Chronic Myelomonocytic Leukemia (CMML)

According to the American Cancer Society, Chronic myelomonocytic leukemia (CMML) is a type of cancer that starts in blood-forming cells of the bone marrow and invades the blood. It affects mainly older adults. For more information, please visit

About H3B-8800

H3B-8800 is an oral, potent and selective small molecule modulator of splicing factor 3b subunit 1 (SF3B1) that is being developed by H3 Biomedicine as an anticancer therapeutic agent. In pre-clinical studies, H3B-8800 showed dose dependent modulation of canonical and aberrant splicing when dosed orally at tolerated doses. Oral administration of H3B-8800 demonstrated preferential antitumor activity in several pre-clinical xenograft models carrying spliceosome mutations. H3 Biomedicine’s lead research and discovery programs in splicing are designed to develop drugs that target the vulnerabilities related to deregulated RNA homeostasis in cancer.

About H3 Biomedicine Inc.

H3 Biomedicine is a Cambridge, Massachusetts-based biopharmaceutical company specializing in the discovery and development of precision oncology treatments, and was established as a subsidiary of Eisai's U.S. pharmaceutical operation, Eisai Inc. Leveraging this collaboration with Eisai, Co, Ltd., who through this partnership provides essential research funding and access to the capabilities and resources of this global pharmaceutical company, H3 Biomedicine combines long-term vision with operational independence. Using modern synthetic chemistry, chemical biology, and human genetics, H3 Biomedicine seeks to bring the next generation of cancer treatments to market with the goal of improving the lives of patients. For more information, please visit

Media Inquiries