CompletedPhase 1 / Phase 2NCT05795595
Official study title

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

Study 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.

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Key things to know

Main goalTreatment

This describes the study’s primary purpose.

What is being studiedCTX131

The study team can explain what participation involves.

Who it may be forMesothelioma · Recurrent or relapsed · Resistant or refractory

These are broad labels—not an eligibility decision.

Checked against the public recordLast updated Nov 26, 2025 · Source: ClinicalTrials.gov

Is enrollment open?Completed

Ask the study team to confirm whether enrollment is open.

What kind of study?Phase 1 / Phase 2

Interventional

Where is it offered?7 U.S. locations

Locations may change over time.

Who runs it?CRISPR Therapeutics AG

Study sponsor

01
Study overview

What this study is about

Purpose
Treatment
Study type
Interventional
Phase
Phase 1 / Phase 2
Sponsor
CRISPR Therapeutics AG
Interventions being studied
Biological: CTX131
02
Explore related studies

How this study is categorized

These labels come from structured fields and exact terms in the public record.

03
Public criteria

Who may be able to participate

The sponsor separates these requirements into two groups. You do not need to interpret them alone—use them to guide a conversation with the study team.

Requirements people may need to meetInclusion criteria

Key 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

Reasons someone may not be able to joinExclusion 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.

Important: This is the sponsor’s public criteria, not a determination of eligibility. The study team must review your individual situation.

04
Study sites

U.S. locations

  • Research Site 3Duarte, California
  • Research Site 7Chicago, Illinois
  • Research Site 6Boston, Massachusetts
  • Research Site 2St Louis, Missouri
  • Research Site 4Durham, North Carolina
  • Research Site 1Nashville, Tennessee
  • Research Site 5Houston, Texas

Source and freshness
Processed from ClinicalTrials.gov. Last public update: Nov 26, 2025. Always confirm current availability with the study team.

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