A Study of Intratumoral KL340399 in Patients With Advanced Solid Tumors

A Phase 1 Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Preliminary Efficacy of KL340399 Intratumoral 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 intratumoral in patients with advanced solid tumors.

Study Overview

• Status: Completed
• Conditions: Advanced Solid Tumors
• Intervention / Treatment: Drug: KL340399 Intratumoral

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 intratumoral 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: Interventional
• Enrollment (Actual): 6
• Phase: Phase 1

Contacts and Locations

Study Locations

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

Participation Criteria

Eligibility Criteria

• 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 for intratumoral ;
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

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Dose Escalation; KL340399 weekly on Days 1, 8 and 15 on repeated 21-day cycles in escalating doses.	Drug: KL340399 Intratumoral; KL340399 is a STING-activating. The strength of KL340399 is 0.2 mg/vial or 0.2 mg/vial.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of subjects achieving Dose-limiting toxicity (DLT)	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)	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]	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)	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

Outcome Measure	Measure Description	Time Frame
Objective Response Rate (ORR)	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)	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)	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)	OS: Time from start of treatment to death due to any reason.	Up to 24 months

Collaborators and Investigators

• Sponsor: Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.
• Investigators: Principal Investigator: Jun Guo, Dr., Peking University Cancer Hospital & Institute

Study record dates

Study Major Dates

• Study Start (Actual): August 30, 2022
• Primary Completion (Actual): April 21, 2025
• Study Completion (Actual): April 21, 2025

Study Registration Dates

• First Submitted: September 18, 2022
• First Submitted That Met QC Criteria: September 18, 2022
• First Posted (Actual): September 22, 2022

Study Record Updates

• Last Update Posted (Actual): May 8, 2026
• Last Update Submitted That Met QC Criteria: May 5, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms
• Other Study ID Numbers: KL296-I-02

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No