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A Study to Investigate ALE.P03 as Monotherapy in Adult Patients With Selected Advanced or Metastatic CLDN1+ Solid Tumors

A Study to Investigate ALE.P03 as Monotherapy in Adult Patients With Selected Advanced or Metastatic CLDN1+ Solid Tumors

Recruiting
18 years and older
All
Phase 1/2

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Overview

The purpose of this study is to evaluate the safety, tolerability, pharmacokinetic, pharmacodynamic, preliminary anti-tumor activity, and to determine the recommended Phase II dose (RP2D) of the ALE.P03 monotherapy in adult patients with selected squamous solid tumors.

Description

This Study has a Phase I ALE.P03 monotherapy dose escalation and recommended dose for expansion (RDE) study and a Phase II study of ALE.P03 as monotherapy at RP2D in adult patients with selected advanced or metastatic Claudin-1 positive (CLDN1+) cancers.

Eligibility

Inclusion Criteria:

  • Have histologically and cytologically metastatic confirmed advanced or metastatic colorectal cancer, intrahepatic cholangiocarcinoma, squamous non-small cell lung cancer, urothelial carcinoma, and cervical squamous cell carcinoma.
  • Have documented radiological disease progression at study entry.
  • Have provided tissue for CLDN1 (Claudin-1) analysis in a central laboratory.

Phase I Dose Escalation:

  • Received and being refractory/intolerant to available systemic standard of care (SOC) regimens (based on local institutional guidelines) for advanced disease.

Phase I RDE and Phase II:

  • Received 1-2 available systemic SOC regimens (based on local institutional guidelines) for advanced disease and being refractory or intolerant to treatment.
  • Patients with actionable oncogenic drivers: received feasible targeted therapy.

Applicable for Phase I Dose Escalation, Phase I RDE and Phase II:

  • Measurable disease per RECIST 1.1, as determined by the site.
  • Have a performance status of 0 or 1 on the Eastern Cooperative Oncology Groups Performance Status.
  • Demonstrate adequate bone marrow and organ function as per the protocol.

Exclusion Criteria:

  • SqNSCLC and CSCC: diagnosed with a tumor of predominantly non-squamous histology result or adenocarcinoma.
  • Has received antineoplastic therapies prior to study intervention within specified time frame.
  • Has rapidly progressing disease.
  • Has known active central nervous system metastases and/or carcinomatous meningitis.
  • Has a history of (non-infectious) interstitial lung disease/pneumonitis that required steroids or current symptomatic or clinically significant pneumonitis requiring steroids and/or immunosuppressive therapies.
  • Has clinically significant gastrointestinal bleeding.
  • Has an active infection requiring systemic treatment.
  • Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the clinical study.

Study details
    Cervical Squamous Cell Carcinoma
    Squamous Non-small-cell Lung Cancer
    Colorectal Cancer
    Intrahepatic Cholangiocarcinoma
    Urothelial Carcinoma

NCT07169734

Alentis Therapeutics AG

15 October 2025

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