A Study of KL340399 in Patients With Advanced Solid Tumors

May 5, 2026 updated by: Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.

A Phase 1 Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Preliminary Efficacy of KL340399 Injection in Patients With Advanced Solid Tumors

This is a single center, open-label, dose increasing study to evaluate the safety, tolerability, pharmacokinetic(PK) profile, and antitumor efficacy of KL340399 injection in patients with advanced solid tumors.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

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.

Detailed Description

This is a single center, open-label, dose increasing study to evaluate the safety, tolerability, pharmacokinetic(PK) profile, and antitumor efficacy of KL340399 injection in patients with advanced solid tumors.The dose increasing method of "BLRM" is used to explore the safety, tolerance and determine the maximum tolerated dose(MTD).

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 (Actual)

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.
21

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 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.

Study Contact Backup

  • Name: Lu Si, Dr.
  • Phone Number: 861088196956

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100142
        • Beijing Cancer Hospital

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Patient is at least ≥18 years of age (male or female);
  2. Patients with histologically and/or cytologically confirmed advanced solid tumors who have failed standard of care, or who have no available standard of care regimen, or who are unqualified for standard of care. Presence of at least one measurable lesion based on Response Evaluation Criteria in Solid Tumors (RECIST) v1.1;
  3. Eastern Cooperative Oncology Group (ECOG) score of 0 or 1, estimated survival ≥ 3 months;
  4. Adequate organ and bone marrow function (no blood components and cytokines are allowed within 14 days prior to the first dose) ;
  5. More than 4 weeks from the last radiotherapy, chemotherapy, surgery, hormone treatment, target therapy, and toxicity from previous antitumor therapy returned to baseline or CTCAE≤ grade 1;
  6. Patients of childbearing potential (male or female) must use effective medical contraception during the study and for 3 months after the end of dosing;
  7. Patients voluntarily participate in the study, sign the ICF, and will be able to comply with the protocol-specified visits and relevant procedures.

Exclusion Criteria:

  1. Known history of severe allergies, or allergy to any component of KL340399;
  2. Received any previous therapy of STING-activating, or received any immunostimulant therapy within 28 days；
  3. Have other malignancies within 5 years;
  4. Concomitant or known metastases to brain or central nervous system;
  5. Active autoimmune disease;
  6. History of major cardiovascular diseases;
  7. Uncontrolled systemic diseases；
  8. Known of coagulation disorders, hemorrhagic disease;
  9. Confirmed serious lung disease or lung disease;
  10. Subjects with third space fluid that can not be controled by drainage or other methods;
  11. Known active infection;
  12. Known HIV, active hepatitis B/C virus;
  13. Pregnant or lactating women;
  14. Received immunotherapy and had immune related adverse reactions ≥ grade 3;
  15. Have received stem cell transplantation or organ transplantation;
  16. Receive any live or attenuated live vaccine within 4 weeks;
  17. History of serious dementia, altered mental status, or any psychiatric disorder;
  18. Evidence of alcohol or drug abuse;
  19. Participated in any other clinical trials and received treatment within 4 weeks;
  20. Have other factors based on which the investigator considers that the subjects are not appropriate to participate in the study.

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: N/A
  • Interventional Model: Single Group 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: Dose Escalation
KL340399 weekly on Days 1, 8 and 15 on repeated 21-day cycles in escalating doses.
Drug: KL340399 injection
KL340399 injection is a STING-activating. The strength of KL340399 is 0.2 mg/vial，0.2 mg/vial.

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
Number of subjects achieving Dose-limiting toxicity (DLT)
Time Frame: From data of initial dose until up to 21 days for treatment
DLT is defined as an adverse event (AE) that meets protocol defined DLT criteria during cycle 1 and is at least possibly related to study drug.
From data of initial dose until up to 21 days for treatment
Maximum Tolerated Dose (MTD)
Time Frame: From data of initial dose until up to 21 days for treatment
The maximum tolerated dose (MTD) is refers to the highest dose at which the patient's DLT incidence exceeding 33% during the first cycle.
From data of initial dose until up to 21 days for treatment
Incidence of Adverse Events [Safety and Tolerability]
Time Frame: Up to 24 months
Incidence of adverse events of KL340399 as a monotherapy as determined by patient reporting, clinical laboratory test changes from baseline, and clinically significant changes in physical examination data.
Up to 24 months
Recommended Phase 2 Dose (RP2D)
Time Frame: Up to 24 months
The recommended phase 2 dose (RP2D) will be based on a consideration of the totality of data including but not limited to safety data (including DLTs), PK, PD and preliminary efficacy, as available.
Up to 24 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
Objective Response Rate (ORR)
Time Frame: Up to 24 months
The sum of the number of cases with Complete Response (CR) and Partial Response (PR) in all treated tumor patients (CR + PR) divided by the total number of cases.
Up to 24 months
Progression Free Survival (PFS)
Time Frame: Up to 24 months
PFS: Time from start of treatment to progression of disease (PD) or death, whichever occurs first, in patients with tumors.
Up to 24 months
Duration of Response (DOR)
Time Frame: Up to 24 months
DOR: Time from the start of the first assessment of CR or PR in tumor patients to PD or death due to any reason.
Up to 24 months
Overall Survival (OS)
Time Frame: Up to 24 months
OS: Time from start of treatment to death due to any reason.
Up to 24 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.
Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Jun Guo, Dr., Peking University Cancer Hospital & Institute

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 (Actual)

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.
June 7, 2022

Primary Completion (Actual)

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.
April 2, 2025

Study Completion (Actual)

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.
April 2, 2025

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).
May 19, 2022

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.
May 19, 2022

First Posted (Actual)

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.
May 24, 2022

Study Record Updates

Last Update Posted (Actual)

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.
May 8, 2026

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.
May 5, 2026

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.
May 1, 2026

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.
  • KL296-I-01

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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