Status:
RECRUITING
A Phase 1/2 Clinical Trial to Assess the Safety, Tolerability, Pharmacokinetics and Preliminary Efficacy of HMBD-501 in Patients With HER3-Expressing Solid Tumors
Lead Sponsor:
Hummingbird Bioscience
Conditions:
Melanoma (Skin)
Non Small Cell Lung Cancer
Eligibility:
All Genders
18+ years
Phase:
PHASE1
PHASE2
Brief Summary
This study is a Phase 1/2, first-in-human, open-label, clinical trial to assess the safety, tolerability, pharmacokinetics and preliminary efficacy of HMBD-501 in patients with advanced-stage, relapse...
Eligibility Criteria
Inclusion
- Body weight ≥ 40 kg.
- Willing and able to provide signed written informed consent before any study-related screening procedures are performed.
- Patients with histologically or cytologically confirmed diagnosis of advanced-stage or metastatic HER3+ solid tumors that are relapsed or refractory to or ineligible for standard therapy, or for whom no standard therapy is available; or the patient has documented their refusal of standard of care therapies. These include the following:
- Unresectable or metastatic cutaneous melanoma (HER3+)
- Locally advanced or metastatic mutated EGFR (mEGFR) NSCLC (HER3+)
- Unresectable, locally advanced or metastatic breast cancer
- Relapsed or refractory solid tumors, with documented HER3+ expression such as Pancreatic Ductal Adenocarcinoma (PDAC) and gastric cancers, may be allowed in the protocol following sponsor approval on a case-by -case basis.
- If molecular pathology report to confirm HER3+ status is not available, willingness to undergo fresh tumor biopsy for retrospective assessment of HER3+ status following enrollment..
- Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0-2.
- Contraceptive requirements:
- Women of childbearing potential (WOCBP) must use contraception from at least 28 days prior to study start, during the study, and for at least 6 months after the last dose of study drug.
- Males who are sexually active with partner(s) who are WOCBP must agree to use a male condom with spermicide beginning at study start, during the study and for at least 6 months after the last dose of study drug.
- Females must:
- Agree to not donate eggs (ova, oocytes) for the purposes of assisted reproduction during the study and for at least 6 months after the last dose of study drug.
- Agree to not breastfeed and do not plan to become pregnant during the study and for at least 6 months after the last dose of study drug.
- Males must:
- Agree to not donate sperm beginning at study start, during the study, and for at least 6 months after the last dose of study drug.
- Agree to not plan to father a child beginning at study start, during the study, and for at least 6 months after last dose of study drug.
- Willingness and ability to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures.
Exclusion
- Any of the following treatment interventions within the specified time frame prior to study drug administration at study start:
- Any anti-tumor-directed drug therapy within 21 days or 5 times the elimination half-life (whichever is shorter).
- Treatment with investigational drugs within 21 days.
- Major surgery within 21 days.
- Radiation therapy ≤4 weeks or radiotherapy that included \>30% of the bone marrow.
- Autologous or allogeneic stem cell transplantation or allogeneic tissue/organ transplant within 3 months.
- CYP3A4 strong inhibitor (including any prescription or non-prescription drugs or herbal supplements) ≤4 half-lives.
- CYP3A4 strong inducer ≤4 half-lives.
- OATP1B inhibitor (including any prescription or non-prescription drugs or herbal supplements) ≤4 half-lives.
- Prior treatment with a HER3-targeted ADC or any exatecan- or exatecan-derivative-conjugated ADC inhibitor as last line of therapy.
- Prior treatment with a topoisomerase I inhibitor as last line of therapy.
- Primary immune deficiency (e.g. congenital syndromes).
- Active and uncontrolled infections requiring intravenous antibiotic or antiviral treatment within 2 weeks prior to study start.
- Known/suspected hypersensitivity against ENV-501, human or humanized immunoglobulin Gs (IgGs), or their ingredients.
- History of noninfectious or drug-induced pneumonitis or interstitial lung disease (ILD).
- Known seropositivity (except after vaccination or confirmed cure for hepatitis) for human immunodeficiency virus (HIV), hepatitis B virus (HBV), or hepatitis C virus (HCV).
- Leptomeningeal disease, symptomatic or uncontrolled (active) brain metastasis (note: brain metastases not requiring steroids or anti-epileptic therapy are allowed if stable for ≥4 weeks prior to study start and patient is neurologically stable).
- Pregnant or WOCBP who have a positive b-human chorionic gonadotropin (HCG) test result at Screening or within 7 days prior to study start.
- Patients with second malignancies that are active (uncontrolled, metastatic) or requiring therapy.
- Patient who is an immediate family member (spouse, parent, child, or sibling; biological or legally adopted) of personnel directly affiliated with the study site or the Sponsor.
Key Trial Info
Start Date :
October 1 2025
Trial Type :
INTERVENTIONAL
Allocation :
ESTIMATED
End Date :
July 1 2027
Estimated Enrollment :
180 Patients enrolled
Trial Details
Trial ID
NCT06956690
Start Date
October 1 2025
End Date
July 1 2027
Last Update
October 8 2025
Active Locations (6)
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1
Research Site
La Jolla, California, United States, 92093
2
Research Site
Indianapolis, Indiana, United States, 46250
3
Research Site
Farmington Hills, Michigan, United States, 48334
4
Research Site
Dallas, Texas, United States, 75230