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Phase IInterventional

A Phase 1 Dose Escalation and Expansion Study of XB628 as a Single Agent and in Combination With Zanzalintinib in Participants With Advanced or Metastatic Solid Tumors

Protocol: 2026P001546NCT: NCT06952010

Overview

This study consists of a Dose-Escalation stage and a Dose Expansion stage. The primary purpose of the dose escalation stage is to determine the maximum tolerated dose (MTD) and/or recommended dosage(s) for expansion (RDE[s]); and the dose expansion stage is to evaluate the preliminary antitumor activity of XB628 as a single agent and in combination with zanzalintinib.

Eligibility

Ages18 Years and older
SexAll
Healthy VolunteersNo
Age GroupsAdult, Older Adult

Key Inclusion Criteria:

  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1.
  • Minimum life expectancy of ≥ 12 weeks.
  • Have a recurrent advanced or metastatic solid tumor that is histologically or cytologically confirmed.
  • Adequate organ and marrow function.
  • Not amenable to curative treatment with surgery or radiation.
  • Received at least 1 line of prior systemic anticancer therapy in the recurrent or metastatic setting.
  • Acceptable alternative therapy was received, refused, intolerable, or no longer effective.
  • Capable of understanding and complying with the protocol requirements and provide signed informed consent according to the protocol and local requirements.

Key Exclusion Criteria

  • Primary brain tumors or known active brain metastases.
  • Major surgery (eg, gastrointestinal surgery, removal or biopsy of brain metastasis) within 4 weeks before the first dose of study treatment.
  • Received radiation therapy within 1 week before the first dose of study treatment or clinically relevant ongoing complications from prior radiation therapy.
  • Received prior therapy targeting NK cells (eg, monalizumab).
  • A woman of childbearing potential has a positive serum pregnancy test within 7 days prior to study treatment.

Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Investigators
Location
Winship Cancer Institute
View on ClinicalTrials.gov