Humanigen Completes Enrollment of Phase 1 Clinical Trial of Lenzilumab for Treatment of Chronic Myelomonocytic Leukemia

March 15, 2018

BRISBANE, Calif., March 15, 2018 (GLOBE NEWSWIRE) -- Humanigen, Inc. (OTCQB:HGEN), a biopharmaceutical company pursuing cutting-edge science to develop its proprietary monoclonal antibodies for immunotherapy and oncology treatments, today announced it has completed patient enrollment in the ongoing phase 1 trial of lenzilumab in patients with previously treated chronic myelomonocytic leukemia (CMML). Lenzilumab is a first-in-class Humaneered® recombinant monoclonal antibody that targets and is an antagonist of soluble granulocyte-macrophage colony-stimulating factor (GM-CSF).

“Full enrollment of the CMML trial shows our unflinching commitment to execution on the important work to progress our assets, strengthen our company and to drive value for patients and all our stakeholders,” said Cameron Durrant, M.D., chairman and chief executive officer of Humanigen. “We look forward to more milestones quickly ahead as we compile an interim report on the safety of lenzilumab in CMML and we initiate a planned phase 1b/2 study to assess lenzilumab’s potential to prevent and/or reduce neurotoxicity related to CAR-T cancer therapy.”

The phase 1, multi-center, open-label, dose-escalation trial is designed to evaluate the maximum tolerated dose, safety and tolerability of single-agent lenzilumab in 12 patients with CMML who are relapsed, refractory to, or intolerant to standard-of-care treatments. The trial will also provide additional data on pharmacokinetics and pharmacodynamics. For more information on the trial, visit


About Lenzilumab

Lenzilumab is a first-in-class, novel Humaneered® recombinant monoclonal antibody designed to target and neutralize circulating granulocyte-macrophage colony-stimulating factor (GM-CSF), a central actor in leukocyte differentiation, autoimmunity and inflammation. There is also extensive evidence linking GM-CSF expression to serious and potentially life-threatening side-effects in chimeric antigen receptor T-cell (CAR-T) therapy, such as neurotoxicity and Cytokine Release Syndrome (CRS).  Humanigen is working with leading CAR-T experts to develop lenzilumab as a potential prophylaxis and treatment to minimize neurotoxicity associated with CAR-T cancer therapy. In addition, lenzilumab is currently being evaluated as a potential treatment for rare leukemias with a phase 1 trial (NCT02546284) in patients with chronic myelomonocytic leukemia (CMML) with additional potential in juvenile myelomonocytic leukemia (JMML), a rare pediatric cancer. In previous clinical trials, lenzilumab has shown to be safe and well-tolerated in more than 100 patients, including those with rheumatoid arthritis, asthma and healthy volunteers. It is a potent inhibitor of GM-CSF in vivo.


About Humanigen 

Humanigen, Inc. is a biopharmaceutical company pursuing cutting-edge science to develop its proprietary monoclonal antibodies for immunotherapy and oncology treatments. Derived from the company’s Humaneered®platform, lenzilumab and ifabotuzumab are lead compounds in the portfolio of monoclonal antibodies with first-in-class mechanisms. Lenzilumab, which targets GM-CSF, is in development as a potential medicine to make CAR-T therapy safer and more effective, as well as a potential treatment for rare hematologic cancers such as chronic myelomonocytic leukemia (CMML) and juvenile myelomonocytic leukemia (JMML). Ifabotuzumab, which targets Ephrin type-A receptor 3 (EphA3), is being explored as a potential treatment for glioblastoma multiforme (GBM) and other deadly cancers, as well as a platform for creation of CAR-T and bispecific antibodies. For more information, visit


Forward-Looking Statements

This release contains forward-looking statements that are intended to be subject to protection afforded by the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect management's current knowledge, assumptions, judgment and expectations regarding future performance or events. Although management believes that the expectations reflected in such statements are reasonable, they give no assurance that such expectations will prove to be correct and you should be aware that actual events or results may differ materially from those contained in the forward-looking statements. Words such as "will," "expect," "intend," "plan," "potential," "possible," "goals," "accelerate," "continue," and similar expressions identify forward-looking statements, including, without limitation, statements regarding our expectations for executing on the key priorities and anticipated milestones described above in regard to phase 1b/2 trial of lenzilumab for the prevention of neurotoxicity associated with CAR-T and phase 1 study as a potential treatment for CMML, and the investigator-sponsored phase 0/1 radio-labeled imaging trial of ifabotuzumab as a potential treatment of GBM. Forward-looking statements are subject to a number of risks and uncertainties including, but not limited to, the risks inherent in Black Horse Capital and its affiliates owning more than 50% of our outstanding common stock, including their ability to control the company; our lack of profitability and the need for additional capital to operate our business as a going concern; the uncertainties inherent in the development and launch of any new pharmaceutical product; the outcome of pending or future litigation; and the various risks and uncertainties described in the "Risk Factors" sections and elsewhere in the Company's periodic and other filings with the Securities and Exchange Commission.

All forward-looking statements are expressly qualified in their entirety by this cautionary notice. You should not place undue reliance on any forward-looking statements, which speak only as of the date of this release. We undertake no obligation to revise or update any forward-looking statements made in this press release to reflect events or circumstances after the date hereof or to reflect new information or the occurrence of unanticipated events, except as required by law.



Cameron Durrant
O: 650-243-3181

Mike Cole
O: 949-259-4988
C: 949-444-1341



Source: Humanigen, Inc.

Released March 15, 2018

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