A Study of SGN-B6A in Chinese Participants With Advanced Solid Tumors

Phase 1

Recruiting

• Conditions: Esophageal Squamous Cell Carcinoma; Gastroesophageal Junction Adenocarcinoma; Squamous Cell Carcinoma of Head and Neck; Esophageal Adenocarcinoma; Gastric Adenocarcinoma; Carcinoma, Non-Small Cell Lung
• Interventions: Drug: sigvotatug vedotin

• Registration Number: NCT06549816
• Lead Sponsor: Seagen Inc.

Brief Summary

This trial will look at a drug called sigvotatug vedotin (SGN-B6A) to find out whether it is safe for Chinese participants who have solid tumors. It will study sigvotatug vedotin to find out what its side effects are. A side effect is anything the drug does besides treating cancer. It will also study how do Chinese participants' body interact with sigvotatug...

Detailed Description

Not available

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study First Submitted: 2024-07-22
• Study First Submitted QC: 2024-08-08
• Study First Posted: 2024-08-12
• Study Start: 2024-08-21
• Status Verified: 2024-10
• Last Update Submitted: 2024-10-11
• Last Update Posted: 2024-10-16
• Primary Completion: 2025-09-30
• Study Completion: 2025-09-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 12

Inclusion Criteria

• Subjects must have histologically or cytologically confirmed metastatic or unresectable locally advanced solid malignancy within one of the tumor types listed below.

  • NSCLC
  • HNSCC
  • ESCC
  • GAC
  • EAC
  • GEJ adenocarcinoma

• Subjects must have disease that is relapsed or refractory, or be intolerant to systemic standard-of-care therapies, and in the judgement of the investigator, should have no appropriate standard-of-care therapeutic option. If a standard-of-care therapy is available that has not been administered, the reason that the therapy is not appropriate must be documented.

• Adequate organ function as defined by the baseline laboratory criteria obtained within 7 days prior to SGN-B6A initiation (Cycle 1 Day 1)

• Measurable or non-measurable disease per RECIST v1.1 at baseline.

• An Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0 or 1.

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Exclusion Criteria

• History of another malignancy within 3 years before the first dose of study intervention, or any evidence of residual disease from a previously diagnosed malignancy. Exceptions are malignancies with a negligible risk of metastasis or death.

• Participants with any of the following respiratory conditions:

  • Evidence of noninfectious interstitial lung disease (ILD) or pneumonitis that:
  • * Was previous diagnosed and required systemic steroids, or
  • * Is currently diagnosed and managed, or
  • * Is suspected on radiologic imaging at screening
  • Known diffusing capacity of the lung for carbon monoxide (DLCO) < 50%
  • Any Grade greater than or equal to (≥) 3 pulmonary disease unrelated to underlying malignancy
  • Prior radiation therapy to the lung that is >30 gray (Gy) within 6 months of the first dose of sigvotatug vedotin.

• Pre-existing peripheral neuropathy Grade greater than or equal to (≥) 2

• Uncontrolled diabetes mellitus

• Known active central nervous system metastases. Participants with previously treated brain metastases may participate provided they:

  • are clinically stable for at least 4 weeks prior to study entry after brain metastasis treatment,
  • have no new or enlarging brain metastases, and
  • are off of corticosteroids prescribed for symptoms associated with brain metastases for at least 7 days prior to first dose of study drug.

• Known history or current diagnosis of carcinomatous meningitis

• Previous treatment with an MMAE-containing agent or an agent targeting integrin beta-6

• Prior anticancer therapies:

  • Chemotherapy within 21 days prior to first administration of sigvotatug vedotin
  • Targeted small molecule agents within 14 days or 5 half-lives (whichever is longer) prior to first administration of sigvotatug vedotin
  • Antibody-based anticancer or other investigational antitumor therapy within 28 days prior to first administration of sigvotatug vedotin
  • Focal radiotherapy or major surgery that is not completed 14 days prior to the first dose of sigvotatug vedotin

• Traditional or herbal medicines:

  • Anti-cancer traditional or herbal medicines within 28 days prior to first administration of sigvotatug vedotin
  • Traditional or herbal medicines for other purposes (such as supportive care) within 7 days prior to first administration of sigvotatug vedotin

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
sigvotatug vedotin	sigvotatug vedotin	sigvotatug vedotin monotherapy 1.8 mg/kg adjusted ideal body weight intravenous administration on Days 1 and 15 of a 28-day cycle.

Primary Outcome Measures

Name	Time	Method
Number of participants with adverse events (AEs)	Through 30-37 days following last dose of sigvotatug vedotin; up to 3 years	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.
Number of participants with laboratory abnormalities	Through 30-37 days following last dose of sigvotatug vedotin; up to 3 years
Number of participants with dose-limiting toxicities (DLTs)	Up to 28 days

Secondary Outcome Measures

Name	Time	Method
PK of ac-MMAE in plasma: time to maximum concentration (Tmax) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 (predose, End of Infusion (EOI), and 2 hour and 4 hour post-dose); Multiple dose: Cycle 2 Day 1 (predose, EOI, and 2 hour and 4 hour post-dose) (Each Cycle is 28 days)
Pharmacokinetics (PK) of antibody-conjugated monomethyl auristatin E (ac-MMAE) in plasma: Area under the curve (AUC) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 through predose Cycle 1 Day 15; Multiple dose: Cycle 2 Day 1 through predose Cycle 2 Day 15 (Each Cycle is 28 days)
PK of ac-MMAE in plasma: maximum concentration (Cmax) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 (predose, end of infusion [EOI], and 2 hour and 4 hour post-dose); Multiple dose: Cycle 2 Day 1 (predose, EOI, and 2 hour and 4 hour post-dose) (Each Cycle is 28 days)
PK of ac-MMAE in plasma: apparent half-life (t1/2) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 through predose Cycle 1 Day 15; Multiple dose: Cycle 2 Day 1 through predose Cycle 2 Day 15 (Each Cycle is 28 days)
PK of ac-MMAE in plasma: trough concentration (Ctrough) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 15 predose; Multiple dose: Cycle 2 Day 15 predose (Each Cycle is 28 days)
PK of monomethyl auristatin E (MMAE) in plasma - AUC after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 through predose Cycle 1 Day 15; Multiple dose: Cycle 2 Day 1 through predose Cycle 2 Day 15 (Each Cycle is 28 days)
PK of MMAE in plasma: maximum concentration (Cmax) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 (predose, end of infusion [EOI], and 2 hour and 4 hour post-dose); Multiple dose: Cycle 2 Day 1 (predose, EOI, and 2 hour and 4 hour post-dose) (Each Cycle is 28 days)
PK of MMAE in plasma: time to maximum concentration (Tmax) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 (predose, EOI, and 2 hour and 4 hour post-dose); Multiple dose: Cycle 2 Day 1 (predose, EOI, and 2 hour and 4 hour post-dose) (Each Cycle is 28 days)
PK of MMAE in plasma: apparent half-life (t1/2) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 1 through predose Cycle 1 Day 15; Multiple dose: Cycle 2 Day 1 through predose Cycle 2 Day 15 (Each Cycle is 28 days)
PK of MMAE in plasma: trough concentration (Ctrough) after a single dose and multiple doses of SGN-B6A	Single dose: Cycle 1 Day 15 predose; Multiple dose: Cycle 2 Day 15 predose (Each Cycle is 28 days)
Number of participants with antidrug antibodies	From first dose through up to 37 days following last dose of sigvotatug vedotin

Trial Locations

Locations (3)

Guangdong Provincial People's Hospital; 🇨🇳 Guangzhou, China

Jiangsu Province Hospital; 🇨🇳 Nanjing, China

Union Hospital, Tongji Medical College of Huazhong University of Science & Technology; 🇨🇳 Wuhan, China