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A Study to Investigate the Safety and Efficacy of KQB168 as Monotherapy and in Combination in Participants With Advanced Solid Malignancies

A Phase 1, Open-label, Multicenter, Dose Escalation Study Evaluating the Safety, Tolerability, Pharmacokinetics and Efficacy of KQB168 as Monotherapy and in Combination With Pembrolizumab in Participants With Advanced Solid Malignancies

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06994806
Enrollment
84
Registered
2025-05-29
Start date
2025-06-24
Completion date
2028-05-31
Last updated
2026-03-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Solid Tumor Malignancies

Brief summary

The goal of this clinical trial is to learn if KQB168 works to treat advanced solid tumor cancer in adults. It will also learn about the safety of KQB168. The main questions it aims to answer are: * What is the safe dose of KQB168 by itself or in combination with pembrolizumab? * Does KQB168 alone or in combination with pembrolizumab decrease the size of the tumor? * What happens to KQB168 in the body? Participants will: * Take KQB168 daily, alone or in combination with pembrolizumab * Visit the clinic about 8 times in the first 8 weeks, and then once every 3 weeks after that

Interventions

DRUGKQB168

Oral KQB168

DRUGPembrolizumab

Intravenous pembrolizumab

Sponsors

Kumquat Biosciences Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically confirmed diagnosis of solid tumor malignancy. * Unresectable or metastatic disease that has progressed on immunotherapy. * No available treatment with curative intent * Adequate organ function * Measurable disease per RECIST v1.1

Exclusion criteria

* Active primary central nervous system tumors * Cardiac abnormalities * History of lung diseases * Any condition that may impair drug absorption or prevent oral dosing * Known history of immune-mediated colitis and uncontrolled autoimmune diseases

Design outcomes

Primary

MeasureTime frameDescription
Number of patients who experience treatment-emergent adverse events (AEs), serious adverse events (SAEs), and dose-limiting toxicities (DLTs)up to 36 monthsSafety characterized by type, incidence, severity, timing, seriousness and relationship to study treatment of AEs, SAEs, and DLTs, from first dose of study treatment to 30 days after last dose of study treatment.

Secondary

MeasureTime frameDescription
Overall response rate (ORR)up to 36 monthsUsing RECIST v1.1
Duration of response (DOR)up to 36 monthsUsing RECIST v1.1
Time to response (TTR)up to 36 monthsUsing RECIST v1.1
Disease control rate (DCR)up to 36 monthsUsing RECIST v1.1
Progression-free survival (PFS)up to 36 monthsUsing RECIST v1.1
Overall survival (OS)up to 36 monthsusing RECIST v1.1
Concentration-time curve (AUC)up to 36 months
Maximum plasma concentration (Cmax)up to 36 months
Time to maximum plasma concentration (tmax)up to 36 months
Pharmacologically Active Dose (PAD)up to 36 monthsAssessment of tumor and systemic immune activation

Countries

United States

Contacts

CONTACTKumquat Clinical Development
kumquatstudies@kumquatbio.com(858) 214-2700

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 4, 2026