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A Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Anti-tumor Activity of CBI-1214 T Cell Engager in Participants With Advanced or Metastatic MSS/MSI-L Colorectal Cancer

A Phase 1, First-in-human (FIH), Dose-Escalation and Dose-Optimization Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Anti-tumor Activity of CBI-1214 T Cell Engager in Participants With Advanced or Metastatic Microsatellite Stable (MSS)/Microsatellite Instability Low (MSI-L) Colorectal Cancer

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07321106
Enrollment
80
Registered
2026-01-06
Start date
2026-01-15
Completion date
2029-10-01
Last updated
2026-08-26

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

Conditions

Advanced Colorectal Cancer, Colon Cancer, Colorectal Cancer, Colorectal Cancer (CRC), Colorectal (Colon or Rectal) Cancer, CRC, Metastatic Colon Cancer

Keywords

Oncology, Solid Tumor, Phase 1, First-in-Human, Dose Escalation, Open-Label, T-Cell Engager, TCE, CartographyBio

Brief summary

This study will investigate the safety, tolerability, pharmacokinetics, and anti-tumor activity of CBI-1214 in participants with advanced or metastatic Microsatellite Stable (MSS)/Microsatellite Instability Low (MSI-L) Colorectal Cancer

Interventions

BIOLOGICALCBI-1214

CBI-1214 is a bispecific T cell engager that binds to LY6G6D and CD3. It is designed to link the patients T cells to cancer cells and to mediate tumor cell killing. LY6G6D is an emerging target specifically expressed on malignant colorectal cancer cells.

Sponsors

Cartography Biosciences
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

The main inclusion criteria include but are not limited to the following: * Participant with MSS/MSI-L CRC, who has exhausted at least one prior line of standard systemic therapy for their current malignancy. * Participant with genomic aberrations, including but not limited to BRAFV600E mutations and HER2 amplifications, for which FDA-approved targeted therapies are available, must: * Have received prior treatment with applicable FDA-approved targeted therapies AND * Either have experienced disease progression, be refractory, or be intolerant to directed molecular therapy. * Participant able to provide archival tissue sample or fresh biopsy tissue sample

Exclusion criteria

The main

Design outcomes

Primary

MeasureTime frameDescription
To evaluate the safety and tolerability of CBI-1214 at increasing dose levels and optimized dose levels in participants with advanced or metastatic MSS/MSI-L CRCApproximately 48 monthsIncidence and severity of TEAEs, TRAEs, and TESAEs; changes in vital signs, physical examinations, and clinical laboratory parameters per NCI-CTCAE v5.0.
To determine the MTD and/or OBD and select the recommended dose(s) of CBI-1214 for dose optimizationApproximately 48 monthsIncidence of DLTs observed during the first treatment cycle

Secondary

MeasureTime frameDescription
To characterize the Serum Concentration of CBI-1214.Approximately 48 monthsSerum concentration of CBI-1214 at specified timepoints following a single infusion as well as following repeat infusions.
Overall Response Rate (ORR)Approximately 48 monthsORR is defined as the proportion of patients with a complete response (CR) or partial response (PR) as determined by the investigator according to Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1)
Duration of Response (DOR)Approximately 48 monthsDuration of response (DOR), defined as the time from the first occurrence of a documented objective response to disease progression or death from any cause (whichever occurs first), as determined by the investigator according to RECIST v1.1
Progression Free Survival (PFS)Approximately 48 monthsThe time from the date of first dose of study treatment to the first documentation of disease progression as determined by RECIST version 1.1, or death from any cause, whichever occurs first.
Time to Response (TTR)Approximately 48 monthsThe time from the date of first dose of study treatment to the first documented evidence of objective tumor response (Complete Response \[CR\] or Partial Response \[PR\]) as assessed per RECIST version 1.1.
Clinical Benefit Rate (CBR)Approximately 48 monthsThe proportion of subjects who achieve Complete Response (CR), Partial Response (PR), or Stable Disease (SD) lasting for a minimum prespecified duration (e.g., ≥12 or ≥16 weeks) as determined by RECIST version 1.1.
Overall Survival (OS)Approximately 48 monthsThe time from the date of first dose of study treatment to death from any cause.

Countries

United States

Contacts

CONTACTStudy Lead
clinicaltrials@cartography.bio833-318-4749

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 27, 2026