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A Safety and Efficacy Study Evaluating CTX131 in Adult Subjects With Relapsed or Refractory Solid Tumors

A Phase 1/2, Open-label, Multicenter, Dose Escalation and Cohort Expansion Study of the Safety and Efficacy of Anti-CD70 Allogeneic CRISPR-Cas9-Engineered T Cells (CTX131) in Adult Subjects With Relapsed or Refractory Solid Tumors

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05795595
Enrollment
19
Registered
2023-04-03
Start date
2023-03-13
Completion date
2025-09-18
Last updated
2025-11-26

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

Conditions

Cervical Carcinoma, Clear Cell Renal Cell Carcinoma, Esophageal Carcinoma, Malignant Pleural Mesothelioma, Pancreatic Adenocarcinoma

Keywords

CAR-T, Allogeneic, Carcinoma

Brief summary

This is an open-label, multicenter, Phase 1/2 study evaluating the safety and efficacy of CTX131™ in subjects with relapsed or refractory solid tumors.

Detailed description

An open-label, multi-center Phase 1/2 study of CTX131 in subjects with relapsed/refractory solid tumors. CTX131 is an is allogeneic CD70- directed chimeric antigen receptor (CAR) T cell immunotherapy comprised of allogeneic T cells that are genetically modified ex vivo using CRISPR-Cas9 (clustered regularly interspaced short palindromic repeats/ CRISPR associated protein 9) gene editing components (single guide RNA and Cas9 nuclease).

Interventions

BIOLOGICALCTX131

CTX131 (CD70-directed T-cell immunotherapy comprised of allogeneic T cells genetically modified ex vivo using CRISPR-Cas9 gene editing components)

Sponsors

CRISPR Therapeutics AG
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

Key Inclusion Criteria: 1. Age ≥18 years. 2. Unresectable or metastatic, relapsed/refractory, clear cell renal cell carcinoma, cervical carcinoma, pancreatic adenocarcinoma, esophageal carcinoma, and malignant pleural mesothelioma. 3. Eastern Cooperative Oncology Group performance status 0 or 1. 4. Adequate renal, liver, cardiac and pulmonary organ function. 5. Female subjects of childbearing potential and male subjects must agree to use acceptable method(s) of contraception from enrollment through at least 12 months after CTX131 infusion. Key

Exclusion criteria

1. Prior treatment with anti-CD70 targeting agents 2. History of certain central nervous system (CNS), cardiac or pulmonary conditions. 3. Presence of uncontrolled bacterial, viral, or fungal infection. 4. Active HIV, hepatitis B virus or hepatitis C virus infection. 5. Primary immunodeficiency disorder or active autoimmune disease requiring steroids and/or other immunosuppressive therapy. 6. Women who are pregnant or breastfeeding.

Design outcomes

Primary

MeasureTime frameDescription
Phase 1 (Dose Escalation): Incidence of adverse eventsFrom CTX131 infusion up to 28 days post-infusionDefined as dose-limiting toxicities
Phase 2 (Cohort Expansion): Objective response rate (ORR)From CTX131 infusion up to 60 months post-infusionORR based on Independent Review Committee (IRC) assessment, defined as the proportion of subjects who have achieved a best overall response of CR or PR according to appropriate response evaluation criteria for each disease histology

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 6, 2026