Pharmacokinetic (PK) Study of QL1203 and Vectibix® for the Treatment of RAS Wild-type Metastatic Colorectal Cancer

September 18, 2026 updated by: Qilu Pharmaceutical Co., Ltd.

A Randomized, Double-Blind, Parallel-Controlled, Multicenter Phase I Study to Evaluate the Pharmacokinetic Similarity Between QL1203 (Vectibix® Biosimilar Candidate) and Panitumumab (EU-Vectibix®) in Combination With mFOLFOX6 Respectively in Patients With RAS Wild-Type Metastatic Colorectal Cancer

This is a randomized, double-blind, parallel-controlled, multicenter clinical trial to evaluate the pharmacokinetic similarity between QL1203 and Vectibix® in patients with RAS wild-type metastatic colorectal cancer. Eligible trial participants will be randomized in a 1:1 ratio to either the QL1203 or Vectibix® groups, to received QL1203 + mFOLFOX6 and the control group received Vectibix® + mFOLFOX6. PK profiles, immunogenicity, safety and preliminary efficacy will be evaluated and compared between two groups .

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

136

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 100 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Voluntarily participate, have read, understood and signed the informed consent form (ICF), and are able to follow the study procedures.
  • Male or female aged ≥18 years.
  • Metastatic colorectal adenocarcinoma confirmed by histology or cytology, and not suitable for radical surgery, radiotherapy, radiofrequency ablation and other local treatments.
  • Wild-type RAS and wild-type BRAF.
  • At least 1 definite measurable tumor lesion according to RECIST v1.1.
  • Eastern Cooperative Oncology Group Performance Status (ECOG PS) score 0-1.
  • Have adequate organ function.

Exclusion Criteria:

  • Previous systemic treatment: The time from the last dose of neoadjuvant or adjuvant therapy to disease recurrence is > 6 months.
  • Previous treatment with epidermal growth factor receptor (EGFR) targeted drugs for colorectal cancer.
  • Trial participants known to have high microsatellite instability (MSI-H) or mismatch repair deficiency (dMMR).
  • Presence of active central nervous system metastases.
  • Participants with a history of malignancies other than colorectal cancer within 5 years prior to the first dose.
  • Trial participants (both male and female) who are unwilling to accept effective contraception; female trial participants who are pregnant or breastfeeding.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Control Group
Drug: Vectibix®+ mFOLFOX6

Vectibix® (6mg/kg) combined with mFOLFOX6, Q2W
Experimental: Test Group
Drug: QL1203 + mFOLFOX6

QL1203 (6mg/kg) combined with mFOLFOX6, Q2W

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
AUCtau, sd
Time Frame: through the Cycle 1 (each cycle is 2 weeks)

Area under the serum concentration-time curve over one dosing interval after the first dose of QL1203 and Vectibix®
through the Cycle 1 (each cycle is 2 weeks)
AUCtau,ss,
Time Frame: through the Cycle 4 (each cycle is 2 weeks)

Area under the serum concentration-time curve over one dosing interval at steady state (at Cycle 4)
through the Cycle 4 (each cycle is 2 weeks)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Qilu Pharmaceutical Co., Ltd.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

November 24, 2026

Primary Completion (Estimated)

February 28, 2028

Study Completion (Estimated)

August 30, 2028

Study Registration Dates

First Submitted

September 9, 2026

First Submitted That Met QC Criteria

September 18, 2026

First Posted (Actual)

September 21, 2026

Study Record Updates

Last Update Posted (Actual)

September 21, 2026

Last Update Submitted That Met QC Criteria

September 18, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • QL1203-103

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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