DB-1311 in Combination With BNT327 or DB-1305 in Advanced/Metastatic Solid Tumors

NCT06953089RecruitingPHASE2INTERVENTIONAL

Summary

Key Facts

Lead Sponsor

DualityBio Inc.

Enrollment

492

Start Date

2025-07-18

Completion Date

2030-06-30

Study Type

INTERVENTIONAL

Official Title

A Phase II, Multicenter, Open-Label Trial of DB-1311 in Combination With BNT327 or DB-1305 in Participants With Advanced/Metastatic Solid Tumors

Interventions

DB-1311/BNT324BNT327DB-1305/BNT325

Conditions

Solid Tumors

Eligibility

Age Range

18 Years+

Sex

ALL

Inclusion Criteria:

* Adults aged ≥ 18 years or acceptable age according to local regulations at the time of voluntarily signing informed consent.
* At least one measurable lesion as assessed by the Investigator according to RECIST v1.1 criteria.
* Has a life expectancy of ≥ 3 months.
* Has an Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0-1
* Has adequate organ function within 7 days prior to enrollment/randomization,
* Has adequate treatment washout period prior to the first dose of trial treatment.

  * For HCC patients: Histological/cytological confirmed diagnosis of HCC or clinically confirmed diagnosis of HCC; Has a Child-Pugh class A liver score.
  * For CC patients: Has persistent, recurrent or metastatic cervical cancer with squamous cell, adenocarcinoma, or adenosquamous histology
  * For Melanoma patients: Histologically or cytologically confirmed diagnosis of unresectable Stage III or metastatic melanoma.
  * For PROC patients (Cohort A): Participants must have a confirmed diagnosis of OC, primary peritoneal cancer, or fallopian tube cancer, all of which with high-grade serous histology. Patients must have platinum-resistant disease.
  * For HNSCC patients: Histologically or cytologically confirmed recurrent (recurrent disease that is not amendable to curative treatment with local/ or systemic therapies)/ (disseminated) HNSCC of the oral cavity, oropharynx, hypopharynx, and larynx that is considered incurable by local therapies.
  * For NSCLC patients: Pathologically documented Stage IIIB or IIIC NSCLC not amenable for radical surgery or definitive chemoradiation or Stage IV NSQ NSCLC. Not harboring an EGFR-sensitizing mutation or ALK gene rearrangements or other onco-driver gene mutations

Exclusion Criteria:

* 1\. Prior treatment with B7H3 targeted therapy.
* Prior treatment with antibody-drug conjugate with topoisomerase inhibitor.
* Is a candidate to locoregional treatment with potential to induce complete or near complete response and prolonged tumor control, per investigator's assessment.
* Has an uncontrolled concomitant or intercurrent illness, that in the opinion of the investigator, contra-indicates trial participation, limits compliance with trial procedures or substantially increases the risk of incurring AEs.
* Has uncontrolled or significant cardiovascular disease. Has clinically uncontrolled pleural effusion, ascites or pericardial effusion requiring drainage, peritoneal shunt, or cell-free concentrated ascites reinfusion therapy.
* Has a history of (non-infectious) ILD/pneumonitis.
* Any autoimmune, connective tissue or inflammatory disorders.
* Has spinal cord compression or clinically active central nervous system (CNS) metastases.
* Has unresolved toxicities from previous anticancer therapy, defined as toxicities (other than alopecia) not yet resolved to Grade ≤1 or baseline.

Outcome Measures

Primary Outcomes

Part 1: Number of participants with Dose Limiting Toxicities (DLTs).

Time frame: During the DLT evaluation period, i.e., the time of initiation of the first dose of investigational medicinal product (IMP) up to 21 days

Part 1: Treatment-emergent adverse events (TEAEs) and treatment-emergent serious AE (TESAEs)

Time frame: up to follow up period, e.g. up to 72 months.

Part 2: Treatment-emergent adverse events (TEAEs) and treatment-emergent serious AE (TESAEs) [By arm and dose level]

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 2: Objective response rate (ORR), defined as the proportion of participants in whom a confirmed Complete response (CR) or PR is observed as best overall response (per RECIST 1.1 based on the investigator's assessment)by arm and dose level.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Secondary Outcomes

Part 1: ORR, defined as the proportion of participants in whom a confirmed CR or PR is observed as best overall response (per RECIST 1.1 based on the investigator's assessment).

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Duration of response (DoR) per RECIST 1.1 based on the investigator's assessment.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Overall survival (OS)

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Disease-control rate (DCR) per RECIST 1.1 based on the investigator's assessment.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Time to response (TTR) per RECIST 1.1 based on the investigator's assessment.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Progression-free survival (PFS) per RECIST 1.1 based on the investigator's assessment.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1: Cancer antigen 125 (CA-125) response rate assessed per Gynecological Cancer Intergroup (GCIG) criteria in participants with platinum-resistant ovarian cancer (PROC).

Time frame: From the time of initiation of the first dose of IMP to end of Part 1

Part 1: Cancer antigen 125 (CA-125) response rate assessed per Gynecological Cancer Intergroup (GCIG) criteria in participants with PROC.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 2:Treatment-emergent adverse events (TEAEs) and treatment-emergent serious AE (TESAEs)

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Maximum observed concentration (Cmax) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with BNT327.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Maximum observed concentration (Cmax) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with DB-1305/BNT325.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Time to reach maximum observed concentration (Tmax) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with BNT327.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Time to reach maximum observed concentration (Tmax) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with DB-1305/BNT325.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Area under the concentration-time curve from time 0 extrapolated to infinity (AUCinf) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with BNT327.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Area under the concentration-time curve from time 0 extrapolated to infinity (AUCinf) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with DB-1305/BNT325.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Terminal elimination half-life (t1/2) of DB-1311/BNT324 total ADC, total antibody and unconjugated P1021 in combination with BNT327.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Terminal elimination half-life (t1/2) of DB-1311/BNT324 ADC, total antibody and unconjugated P1021 in combination with DB-1305/BNT325.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and 2: Anti-drug antibody (ADA) prevalence: the proportion of participants who are ADA positive at any point in time (at baseline and post-baseline).

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Part 1 and Part 2: ADA incidence: the proportion of participants having treatment-emergent ADA.

Time frame: From the time of initiation of the first dose of IMP to end of study, i.e., up to 72 months

Locations

USA06-0, Los Angeles, United States

USA16-0, Los Angeles, United States

USA01-0, Wheat Ridge, United States

USA08-0, Florida City, United States

USA10-0, Atlanta, United States

USA11-0, Bethesda, United States

USA14-0, Lincoln, United States

USA04-0, New York, United States

USA15-0, Portland, United States

USA03-0, Charleston, United States

USA13-0, Anderson, United States

USA12-0, Houston, United States

USA05-0, Virginia Beach, United States

USA09-0, Puyallup, United States

USA07-0, Spokane, United States

AUS07-0, North Sydney, Australia

AUS06-0, Benowa, Australia

AUS04-0, Birtinya, Australia

AUS05-0, Adelaide, Australia

CHN02-0, Beijing, China

CHN13-0, Beijing, China

CHN23-0, Beijing, China

CHN17-0, Dongguan, China

CHN06-0, Henan, China

CHN12-0, Xinxiang, China

CHN04-0, Hubei, China

CHN26-0, Wuhan, China

CHN34-0, Wuhan, China

CHN11-0, Changsha, China

CHN16-0, Xuzhou, China

CHN35-0, Shenyang, China

CHN25-0, Xi'an, China

CHN04-0, Shanghai, China

CHN01-0, Shanghai, China

CHN24-0, Chengdu, China

TWN01-0, Taipei, Taiwan

TWN02-0, Taipei, Taiwan

DB-1311 in Combination With BNT327 or DB-1305 in Advanced/Metastatic Solid Tumors