Hummingbird Bioscience, and Cancer Research UK, announced that the first patient has been dosed in a Phase 1 clinical trial of HMBD-001 for the treatment of patients with advanced HER3-expressing solid malignancies (NCT05057013).

The Phase 1 clinical trial in the United Kingdom is being sponsored and managed by Cancer Research UK's Centre for Drug Development and led by Chief Investigator, Professor Johann De Bono at the Royal Marsden Hospital and The Institute of Cancer Research, London. The trial intends to evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, and explore preliminary evidence of HMBD-001 activity in patients with advanced HER3-expressing solid malignancies, including NRG1 fusion-driven cancers.

HMBD-001 is the first of Hummingbird Bioscience's deep pipeline of antibody drug candidates to enter clinical trials. Rationally developed using Hummingbird Bioscience's proprietary Rational Antibody Discovery (RAD) platform, HMBD-001 is the only reported anti-HER3 antibody in clinical development that uses a highly differentiated mechanism of action designed to block the formation of all active HER3 dimers, regardless of NRG1 ligand binding or HER2/EGFR overexpression.

"Dosing of the first patient in the clinical trial of HMBD-001, Hummingbird's most advanced program, marks the beginning of a potentially transformative approach to treating HER3-driven cancers," said Dr. Jerome Boyd-Kirkup, Chief Scientific Officer, Hummingbird Bioscience. "I am immensely proud of the teamwork that has brought our differentiated program to this point. Hummingbird Bioscience is dedicated to discovering and developing important medicines for cancer and autoimmune disease with our unique Rational Antibody Discovery platform."

"This significant milestone brings us a step closer to provide a much-needed and highly differentiated therapy for patients with HER3-driven cancers," said Dr. Eric Rowinsky, Chief Medical Officer, Hummingbird Bioscience. "We are pleased to partner with Cancer Research UK for this trial, and we look forward to advancing the clinical development of HMBD-001 for cancer patients."

Dr. Nigel Blackburn, Director of Cancer Research UK's Centre for Drug Development, said, "We are thrilled to be working with Hummingbird Bioscience to advance its novel drug candidate into clinical trials. Although HER3 was discovered over 30 years ago, no therapies able to block its cancer-promoting action have been approved. Hummingbird Bioscience has taken fresh aim at a difficult drug target and has come up with a novel, potentially transformative antibody for cancer patients who desperately need new treatments."