Study of QLC5513 in Combination With Epalolimab Tovolimab (QL1706) ± Platinum in Patients With Advanced or Metastatic Malignant Solid Tumors

November 26, 2025 updated by: Qilu Pharmaceutical Co., Ltd.

An Open, Multicenter Phase Ib/II Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Efficacy of QLC5513 in Combination With Epalolimab Tovolimab (QL1706) ± Platinum in Patients With Advanced or Metastatic Malignant Solid Tumors

The goal of this Phase Ib/II interventional study is to evaluate the safety, tolerability, pharmacokinetics and efficacy of QLC5513 combined with QL1706± platinum in the treatment of patients with advanced or metastatic malignant solid tumors. This study is divided into two phases: Phase Ib is the combined dose escalation phase, where dose escalation of QLC5513 combined with QL1706± platinum is conducted and RP2D is explored; In the Phase II tumor type expansion study stage, the primary objective is to evaluate the objective response rate (ORR) of QLC5513 combined with QL1706± platinum-based treatment in patients with advanced or metastatic malignant solid tumors.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
290

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2
  • 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

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Has an eastern cooperative oncology group (ECOG) performance status of 0 to 1.
  2. Has adequate organ function.
  3. The expected survival period is ≥3 months.
  4. Based on the pathological report of the most recent biopsy or other pathological specimens, advanced or metastatic solid tumors confirmed by histology or cytology are not suitable for radical treatments such as surgery and radiotherapy.
  5. According to the RECIST v1.1 evaluation criteria, the participants had at least one radiologically measurable lesion.

Exclusion Criteria:

  1. Prior treatment with TROP2-targeting agents, ADCs with topoisomerase 1 inhibitor (TOP1i) payloads, or other TOP1i drugs.
  2. There was symptomatic central nervous system (CNS) metastasis, leptomeningeal metastasis or spinal cord compression caused by metastasis before the first use of the investigational product.
  3. Active, uncontrolled bacterial, fungal or viral infections.
  4. Radiotherapy with more than 25% of the bone marrow exposed within 4 weeks prior to the first use of the investigational drug; Local radiotherapy (excluding brain radiotherapy) was performed within two weeks before the first use of the investigational drug.
  5. Subjects with a history of a second malignant tumor other than the target indication within 5 years prior to signing the informed consent (excluding cured basal cell skin cancer, superficial bladder cancer, carcinoma in situ of the breast, papillary thyroid carcinoma, etc.).
  6. Prior to the first dose of the investigational product, all reversible toxicities from prior anti-tumor therapy (excluding alopecia and pigmentation) have not recovered to ≤ Grade 1 (as assessed by CTCAE v5.0), with the exception that peripheral neuropathy must have not recovered to ≤ Grade 2. History of irAEs from prior immune checkpoint inhibitor treatment that required permanent discontinuation of the immune checkpoint inhibitor.
  7. Active autoimmune disease that has required systemic treatment in the past 2 years.

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: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Arm A: QLC5513+QL1706
Drug: QLC5513 IV infusion
Participants will receive QLC5513 16 mg/kg intravenously on Days1, Day 8 and Day 15 of 28-day cycles.
Biological: QL1706, IV infusion
QL1706 5mg/kg intravenously on Day 1 of 21-day.
Experimental: Arm B: QLC5513+QL1706+ platinum
Drug: QLC5513 IV infusion
Participants will receive QLC5513 16 mg/kg intravenously on Days1, Day 8 and Day 15 of 28-day cycles.
Biological: QL1706, IV infusion
QL1706 5mg/kg intravenously on Day 1 of 21-day.
Drug: platinum, IV infusion
Cisplatin: 75 mg/m ² or carboplatin：AUC=5 mg/mL/min on Day 1 of 21-day.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
The maximum tolerated dose (MTD)/maximum administration dose (MAD) and RP2D of QLC5513 combined with QL1706± platinum in patients with advanced solid tumors.
Time Frame: up to 12 months
up to 12 months
Number of participants who experience one or more adverse events(AEs).
Time Frame: up to 48 months
An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.
up to 48 months
Objective Response Rate
Time Frame: up to 36 months
ORR is defined as the percentage of participants with Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST 1.1). The percentage of participants who experience CR or PR as assessed by investigator.
up to 36 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
DOR
Time Frame: up to 48 months
For participants who demonstrate a confirmed Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST 1.1), DOR is defined as the time from first documented evidence of CR or PR until progressive disease (PD) or death. Per RECIST 1.1, PD is defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least5 mm. The appearance of one or more new lesions is also considered PD. DOR as assessed by investigator.
up to 48 months
PFS
Time Frame: up to 48 months
PFS is defined as the time from randomization to the first documented progressive disease (PD) or death due to any cause, whichever occurs first as assessed by Response Criteria in Solid Tumors Version1.1 (RECIST 1.1). PD is defined as ≥20%increase in the sum of diameters of target lesions. In addition to the relative increase of20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearanceof one or more new lesions is alsoconsidered PD. PFS as assessed by investigator.
up to 48 months
OS
Time Frame: up to 60 months
OS is defined as the time from randomization to death due to any cause.
up to 60 months

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 30, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 1, 2031

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 26, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 26, 2025

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 9, 2025

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 9, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 26, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • QLC5513-201

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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