WSK-IM02 in Advanced Solid Tumors With Malignant Effusions (Phase I)

A Single-Arm, Open-Label, Prospective Phase I Clinical Study to Evaluate the Safety and Preliminary Efficacy of WSK-IM02 in Patients With Advanced Solid Tumors Complicated by Malignant Pleural or Peritoneal Effusions

This is a prospective, single-center, interventional, phase I, dose-escalation, single-arm study designed to evaluate the safety, tolerability, and preliminary efficacy of intrapleural/intraperitoneal infusion of WSK-IM02 in patients with advanced solid tumors complicated by malignant pleural or peritoneal effusions who have failed standard of care.

Study Overview

• Status: Not yet recruiting
• Conditions: Advanced Solid Tumors; Malignant Ascites; Malignant Pleural Effusions
• Intervention / Treatment: Biological: WSK-IM02

• Study Type: Interventional
• Enrollment (Estimated): 9
• Phase: Phase 1

Contacts and Locations

Study Locations

• China
  • Sichuan
    • Chengdu, Sichuan, China, 610041
      • West China Hospital of Sichuan University
      • Contact: Ting Liu; Phone Number: 19182843926; Email: 1924658083@qq.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Age ≥18 years and ≤75 years.
2. Voluntarily sign informed consent form.
3. Patients with histologically or cytologically confirmed advanced solid tumors.
4. Histologically or cytologically confirmed malignant pleural/peritoneal effusion requiring drainage; or, in the absence of histologic/cytologic evidence, pleural effusion with clear imaging evidence of malignant pleural/peritoneal lesions on chest/abdominal CT and diagnosed as malignant pleural/peritoneal tumor in clinical practice.
5. Have received standard systemic therapy and developed clinical symptoms of serous cavity metastasis.
6. ECOG performance status: 0-2 points. Patients with ECOG 3 may be included if, in the investigator's judgment, removal of the effusion could improve the score to 2 or above.
7. Life expectancy ≥3 months.
8. Adequate major organ function.
9. Able to tolerate thoracentesis/abdominocentesis and catheter placement, or already have a functional thoracic/abdominal drainage catheter in place, and agree to receive study drug treatment via this route.

Exclusion Criteria:

1. Participation in any other interventional clinical trial within 4 weeks prior to the first dose of study drug.
2. Received local intracavitary therapy for pleural/peritoneal effusion (excluding diagnostic or symptom-relieving puncture/drainage) within 2 weeks prior to the first dose of study drug.
3. Received extra-thoracic/extra-abdominal radiotherapy within 2 weeks prior to the first dose of study drug, or received radical radiotherapy to pleural/peritoneal or pulmonary/abdominal lesions within 8 weeks prior to enrollment (palliative radiotherapy to chest/abdomen is permitted).
4. Underwent major thoracic or abdominal surgery within 4 weeks prior to the first dose of study drug and not fully recovered, or planned to undergo elective major surgery during the study period.
5. Any toxicity from prior anti-tumor therapy has not recovered to ≤ Grade 1 at the start of study treatment.
6. Symptomatic, uncontrolled central nervous system (CNS) metastases or leptomeningeal metastases that, in the investigator's judgment, make the patient unsuitable for enrollment.
7. Known human immunodeficiency virus (HIV) infection, active hepatitis B, active hepatitis C, or active syphilis infection.
8. Active, uncontrolled infection requiring systemic antibiotics, antivirals, or antifungal therapy.
9. Pregnant or breastfeeding women.
10. Definite history of severe mental or cognitive disorders that, in the investigator's opinion, may affect study compliance or safety assessment.
11. Presence of any active autoimmune disease, or history of autoimmune disease requiring systemic immunosuppressive therapy (topical glucocorticoids or inhaled/intra-articular steroids are permitted).
12. Require systemic corticosteroids or other immunosuppressants within 2 weeks prior to the first dose of study drug, and expected to require long-term use during the study.
13. Have poorly controlled or severe cardiovascular disease.
14. Have poorly controlled metabolic disease or complete/severe gastrointestinal obstruction requiring intervention.
15. Hypersensitivity to the investigational drug, any of its excipients, liposomal formulations, or kanamycin.
16. Have had a major thromboembolic event within 6 months prior to the first dose, or have a clear bleeding tendency.
17. Active local infection at the administration site.
18. Uncorrectable coagulation dysfunction that would pose a high risk for thoracentesis/abdominocentesis or catheter placement.
19. Have any other concurrent, serious, and/or uncontrolled medical condition.

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: intrapleural/intraperitoneal infusion of WSK-IM02	Biological: WSK-IM02; WSK-IM02 is an injectable pMVA-1 lipid complex

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
adverse events (AE)	Adverse events defined as the number of participants with adverse events according to CTCAE v5.0.	up to 28 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective response rate (ORR)	ORR is defined as the percentage of patients who achieve a response, which can either be complete response (complete disappearance of lesions) or partial response (reduction in the sum of maximal tumor diameters by at least 30% or more)	up to 12 months
Progression-free survival (PFS)	PFS is defined as the time from the administration of the first dose to first disease.	up to 12 months
Overall survival (OS)	OS is defined as the time from the administration of the first dose to death.	up to 12 months

Collaborators and Investigators

• Sponsor: WestVac Biopharma Co., Ltd.

Study record dates

Study Major Dates

• Study Start (Estimated): June 1, 2026
• Primary Completion (Estimated): January 30, 2028
• Study Completion (Estimated): June 30, 2029

Study Registration Dates

• First Submitted: May 22, 2026
• First Submitted That Met QC Criteria: May 22, 2026
• First Posted (Actual): May 29, 2026

Study Record Updates

• Last Update Posted (Actual): May 29, 2026
• Last Update Submitted That Met QC Criteria: May 22, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Respiratory Tract Diseases; Respiratory Tract Neoplasms; Thoracic Neoplasms; Pleural Neoplasms; Pleural Diseases; Pleural Effusion; Pleural Effusion, Malignant
• Other Study ID Numbers: WSK IM02-2

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No