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RecruitingHER2-positive Advanced Solid Tumor

A Phase 1/2a Study of DB-1303/BNT323 in Advanced/Metastatic Solid Tumors

Eligible age

18+ yrs

Accepts

All genders

Locations

21 states

Healthy volunteers

No

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About this study

This is a dose-escalation and dose-expansion Phase 1/2a trial to evaluate the safety and tolerability of DB-1303/BNT323 in subjects with advanced solid tumors that express HER2.

Sponsor: DualityBio Inc.

You may qualify if…

  • Has a pathologically documented HER2-positive or HER2-expressing (except for cohort 2h where the requirement is HER2-null), advanced/unresectable, recurrent, or metastatic malignant solid tumor that is refractory to or intolerable with standard treatment, or for which no standard treatment is available.
  • At least 1 measurable lesion (per RECIST 1.1)
  • Provide signed informed consent
  • ECOG performance status (PS) of 0-1.
  • LVEF ≥ 50% by ECHO or MUGA
  • Adequate organ functions
  • Provide pre-existing diagnosis of HER2 status or resected tumor samples or undergo fresh tumor biopsy for HER2 testing.
  • Life expectancy of ≥ 3 months.

You may not qualify if…

  • History of symptomatic CHF (New York Heart Association \[NYHA\] classes II-IV) or serious cardiac arrhythmia requiring treatment.
  • History of myocardial infarction or unstable angina within 6 months before Day 1.
  • Average QTcF \> 450 ms in males and \> 470 ms in females
  • History of clinically significant lung diseases
  • Uncontrolled infection requiring IV antibiotics, antivirals, or antifungals.
  • HIV infection with AIDS defining illness or active viral hepatitis.
  • Clinically active brain metastases
  • Unresolved toxicities from previous anticancer therapy, defined as toxicities not yet resolved to NCI-CTCAE version 5.0, Grade ≤ 1 or baseline.

Where it's recruiting

California

Cerritos · Los Angeles · San Diego

District of Columbia

Washington D.C.

Florida

Coral Springs · Lakeland · Margate · Miami

Georgia

Newnan

Hawaii

Honolulu

Illinois

Chicago

Louisiana

Covington

Maryland

Silver Spring

Michigan

Dearborn

Missouri

St Louis

Nevada

Las Vegas

Source: ClinicalTrials.gov · NCT05150691 · last updated 2026-01-28