Intraperitoneal Injection of Liposomal Irinotecan as Monotherapy or in Combination With Recombinant Mutant Human Tumor Necrosis Factor or Bevacizumab for the Treatment of Malignant Ascites Following Failure of Prior Standard Therapy

Intraperitoneal Injection of Liposomal Irinotecan as Monotherapy or in Combination With Recombinant Mutant Human Tumor Necrosis Factor or Bevacizumab for the Treatment of Malignant Ascites Following Failure of Prior Standard Therapy：A Phase Ib/II Clinical Study

This study is a prospective, multi-cohort Phase Ib/II clinical trial, consisting of two stages as follows:

1. Phase Ib Dose-Escalation Stage To explore the dose-limiting toxicities (DLT) of intraperitoneally administered liposomal irinotecan in patients with malignant peritoneal effusion who have failed prior standard therapy, and to estimate the maximum tolerated dose (MTD) of the investigational agent.
2. Phase II Expansion Stage To evaluate the efficacy and safety of liposomal irinotecan as monotherapy or in combination with recombinant modified human tumor necrosis factor or bevacizumab, in the treatment of malignant peritoneal effusion in patients who have failed prior standard therapy.

Study Overview

• Status: Recruiting
• Conditions: Malignant Ascites
• Intervention / Treatment: Drug: liposomal irinotecan monotherapy; Drug: liposomal irinotecan monotherapy; Drug: Liposomal Irinotecan + rmhTNF-NC; Drug: Liposomal Irinotecan + Bevacizumab

• Study Type: Interventional
• Enrollment (Estimated): 48
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: Zhang Dongsheng; Phone Number: 13719437860; Email: zhangdsh@sysucc.org.cn
• Study Contact Backup: Name: Wang Yingnan; Phone Number: 15521145855

Study Locations

• China
  • Guangdong
    • Guangzhou, Guangdong, China, 510555
      • Recruiting
      • Sun yat-sen University Cancer Center
      • Contact: Yingnan Wang; Phone Number: +86 15521145855; Email: wangyn@sysucc.org.cn

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

• Aged ≥18 years old, gender unrestricted.
• Histologically or cytologically confirmed malignant peritoneal effusion derived from digestive system tumors (malignancy confirmed by ascites cytology, or peritoneal metastases diagnosed clinically based on imaging findings and symptoms).
• Moderate to large volume of peritoneal effusion, with failure of initial treatment or previous intraperitoneal therapy with conventional chemotherapeutic agents and/or biological response modifiers. Moderate volume of ascites is defined as: ①Ascites depth ≥3 cm confirmed by supine abdominal ultrasound; ② Presence of clinical symptoms (chest distress, dyspnea, abdominal distension and discomfort) judged by the investigator to be related to peritoneal effusion.
• ECOG performance status score 0-2.
• Expected survival time >3 months.
• Essentially normal cardiopulmonary function.

• Adequate organ function, with subjects required to meet the following laboratory parameters:

  1. Peripheral blood count: WBC ≥4.0×10⁹/L, PLT ≥80×10⁹/L, Hb ≥90 g/L.
  2. Renal function: Serum creatinine ≤2×ULN and creatinine clearance rate (calculated by the Cockcroft-Gault formula) ≥40 ml/min.
  3. Hepatic function: Total bilirubin ≤1.5×ULN; or total bilirubin >ULN with direct bilirubin ≤ULN. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5×ULN (for patients with liver metastases, ALT or AST ≤5×ULN is acceptable).
  4. Adequate coagulation function, defined as international normalized ratio (INR) or prothrombin time (PT) ≤1.5×ULN.
• Thyroid stimulating hormone (TSH) ≤ULN. If TSH is abnormal, serum triiodothyronine (T3) and thyroxine (T4) levels, together with clinical manifestations, shall be evaluated comprehensively; subjects in non-acute active phase are eligible for enrollment.
• For non-surgically sterilized subjects of childbearing potential or female subjects of childbearing potential: A medically approved contraceptive method (e.g., intrauterine device, oral contraceptives, or condoms) must be used during the study treatment period and for 6 months after the end of study treatment. For non-surgically sterilized female subjects of childbearing potential, serum or urine HCG test must be negative within 7 days prior to enrollment, and they must be non-lactating. For male subjects whose partners are women of childbearing potential, effective contraceptive measures must be adopted during the trial and for 6 months after the last administration of the study drug.
• Voluntarily participate in the study with good compliance, sign a written informed consent form, and be able to cooperate with follow-up assessments.

Exclusion Criteria:

• History of hypersensitivity to tumor necrosis factor (TNF), its derivative drugs, bevacizumab or its analogs, irinotecan, or liposomal irinotecan.
• Diagnosis of malignant diseases other than gastrointestinal tumors within 5 years prior to the first dose (excluding radically treated basal cell carcinoma of the skin, cutaneous squamous cell carcinoma, and/or radically resected carcinoma in situ).
• Receipt of any other investigational drug treatment or participation in an interventional clinical trial within 7 days prior to the first dose; or receipt of anti-tumor therapy (including Chinese herbal medicines with anti-tumor indications) within 7 days prior to the first dose of the study drug.
• Pregnant or lactating women; women of childbearing potential who are unwilling to take contraceptive measures during the study period; or men who are unwilling to use effective contraceptive measures during treatment and for 1 year thereafter.
• Significant impairment of major organ function.
• Patients with obvious bleeding tendency.
• Clinically significant or uncontrolled cardiac diseases, including unstable angina pectoris, acute myocardial infarction within 6 months prior to the first dose, New York Heart Association (NYHA) Class III/IV congestive heart failure, and uncontrolled arrhythmias (subjects with pacemakers or atrial fibrillation with well-controlled heart rate are permitted).
• Clinically significant ECG abnormalities or relevant medical history as judged by the investigator; screening QTcF interval > 480 ms. For subjects with intraventricular conduction block (QRS interval > 120 ms), JTc interval may be used instead of QTc interval (if JTc is used, it must be ≤ 340 ms).
• Uncontrolled hypertension, defined as systolic blood pressure > 160 mmHg or diastolic blood pressure > 100 mmHg despite optimal medical treatment; a history of hypertensive crisis or hypertensive encephalopathy.
• Severe acute infection that is uncontrolled; current fever (> 38℃), purulent or chronic infection, or unhealed wounds.
• Patients with radiologically confirmed loculated peritoneal effusion; definitely diagnosed peritoneal infection.
• Active acute or chronic hepatitis B or C infection, with hepatitis B virus (HBV) DNA > 2000 IU/mL or 10⁴ copies/mL; hepatitis C virus (HCV) RNA > 10³ copies/mL; concurrent positivity for hepatitis B surface antigen (HBsAg) and anti-HCV antibody. Subjects who have received nucleoside analog antiviral therapy and achieved viral load below the above thresholds are eligible for enrollment. A known history of human immunodeficiency virus (HIV) infection or confirmed positive HIV test results.
• Evidence or history of obvious bleeding tendency within 3 months prior to enrollment (bleeding > 30 mL within 3 months, hematemesis, melena, hematochezia); hemoptysis (> 5 mL of fresh blood within 4 weeks); a history of hereditary or acquired bleeding disorders or coagulation dysfunction. Clinically significant bleeding symptoms or definite bleeding tendency within 3 months prior to enrollment (e.g., gastrointestinal bleeding, hemorrhagic gastric ulcer).
• A history of arterial or venous thrombotic disease within 6 weeks prior to enrollment.
• A known history of allogeneic organ transplantation or allogeneic hematopoietic stem cell transplantation.
• Receipt of major surgery (craniotomy, thoracotomy, or laparotomy) within 4 weeks prior to the first dose of study treatment, or anticipated need for major surgery during the study treatment period.
• Failure to achieve adequate recovery from toxicity and/or complications of major surgery prior to the start of treatment.
• Pregnant or lactating women; or subjects who plan to conceive or give birth during the study period from screening visit to completion of safety follow-up visit (90 days after the last dose for male subjects).
• Receipt of radiotherapy within 4 weeks prior to the first dose of study drug.
• Radiotherapy-related toxicities in subjects must have fully resolved, without the need for corticosteroid therapy, and radiation pneumonitis must be definitely excluded. For palliative radiotherapy for non-central nervous system (CNS) diseases, a 2-week washout period is permitted.
• Uncontrolled neurological or psychiatric diseases/disorders with poor compliance, resulting in inability to cooperate or report treatment responses. Uncontrolled primary brain tumors or central nervous system metastases with obvious intracranial hypertension or neuropsychiatric symptoms.
• Other conditions that, in the investigator's judgment, make the subject unsuitable for participation in this trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Phase Ib Dose-Escalation Stage	Drug: liposomal irinotecan monotherapy; A "3+3" dose-escalation design will be adopted. A total of 9-18 eligible subjects will receive liposomal irinotecan treatment, with three predefined dose levels as follows: Dose Level 1: 20 mg, intraperitoneal injection (ip), administered on Day 1, Day 8, Day 15, and Day 21. Dose Level 2: 30 mg, intraperitoneal injection (ip), administered on Day 1, Day 8, Day 15, and Day 21. Dose Level 3: 40 mg, intraperitoneal injection (ip), administered on Day 1, Day 8, Day 15, and Day 21. Each subject will receive only one treatment cycle. The dosage of liposomal irinotecan will be escalated gradually from the lowest dose level to the highest. Dose-limiting toxicities (DLT) will be monitored throughout the administration cycle. Each subject will receive only one dose level of liposomal irinotecan during the study period. All subjects will complete the relevant tests specified in the protocol during treatment to evaluate safety and preliminary efficacy. Subsequent treatment regimens will be selecte; Drug: liposomal irinotecan monotherapy; Liposomal irinotecan (at RP2D, intraperitoneal injection [ip], administered on Day 1, Day 8, Day 15 and Day 21).
Experimental: Phase II Expansion Stage-ARM A	Drug: liposomal irinotecan monotherapy; A "3+3" dose-escalation design will be adopted. A total of 9-18 eligible subjects will receive liposomal irinotecan treatment, with three predefined dose levels as follows: Dose Level 1: 20 mg, intraperitoneal injection (ip), administered on Day 1, Day 8, Day 15, and Day 21. Dose Level 2: 30 mg, intraperitoneal injection (ip), administered on Day 1, Day 8, Day 15, and Day 21. Dose Level 3: 40 mg, intraperitoneal injection (ip), administered on Day 1, Day 8, Day 15, and Day 21. Each subject will receive only one treatment cycle. The dosage of liposomal irinotecan will be escalated gradually from the lowest dose level to the highest. Dose-limiting toxicities (DLT) will be monitored throughout the administration cycle. Each subject will receive only one dose level of liposomal irinotecan during the study period. All subjects will complete the relevant tests specified in the protocol during treatment to evaluate safety and preliminary efficacy. Subsequent treatment regimens will be selecte; Drug: liposomal irinotecan monotherapy; Liposomal irinotecan (at RP2D, intraperitoneal injection [ip], administered on Day 1, Day 8, Day 15 and Day 21).
Experimental: Phase II Expansion Stage-ARM B	Drug: Liposomal Irinotecan + rmhTNF-NC; Liposomal Irinotecan (at RP2D dose, ip, D1, D8, D15, D21) rmhTNF-NC (300 IU per administration, ip, D1, D8, D15)
Experimental: Phase II Expansion Stage-ARM C	Drug: Liposomal Irinotecan + Bevacizumab; Liposomal Irinotecan (at RP2D dose, ip, D1, D8, D15, D21) Bevacizumab (100 mg, ip, D1, D15)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Maximum Tolerated Dose (MTD)	Defined as the highest dose at which less than 33% of subjects experience dose-limiting toxicity (DLT).	4 weeks after administration
Objective Response Rate	The proportion of subjects achieving complete response and partial response per WHO criteria.	Up to 4 weeks after the first cycle

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Duration of Response	The time interval from the first documentation of objective response in malignant ascites, to the first documentation of disease progression of ascites or death due to any cause, evaluated per the WHO criteria for malignant ascites.	from the first documentation of CR/PR to PD/death, up to 1 year
Disease control rate	The proportion of subjects achieving complete response, partial response, or stable disease in malignant ascites, evaluated per the WHO criteria.	4 weeks after first treatment cycle
Safety and Tolerability	The severity of adverse events will be graded and assessed in accordance with the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) Version 5.0,	through study completion, an average of 1 year
Quality of Life	Assessment will be performed using the Chinese version of the Functional Assessment of Chronic Illness Therapy-Ascites Index (FACIT-AI) to evaluate the impact of malignant ascites and treatment on patients' physical function, symptom burden, and daily living ability.	through study completion, an average of 1 year

Collaborators and Investigators

• Sponsor: Dong sheng Zhang
• Collaborators: CSPC Pharmaceutical Group Limited

Study record dates

Study Major Dates

• Study Start (Actual): November 28, 2025
• Primary Completion (Estimated): June 30, 2028
• Study Completion (Estimated): June 30, 2029

Study Registration Dates

• First Submitted: December 16, 2025
• First Submitted That Met QC Criteria: February 2, 2026
• First Posted (Actual): February 9, 2026

Study Record Updates

• Last Update Posted (Actual): February 9, 2026
• Last Update Submitted That Met QC Criteria: February 2, 2026
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: Bevacizumab; Malignant Ascites; Liposomal Irinotecan; Recombinant Mutant Human Tumor Necrosis Factor; Intraperitoneal Injection
• Additional Relevant MeSH Terms: Amino Acids, Peptides, and Proteins; Proteins; Antibodies, Monoclonal, Humanized; Antibodies, Monoclonal; Antibodies; Immunoglobulins; Immunoproteins; Blood Proteins; Serum Globulins; Globulins; Bevacizumab; irinotecan sucrosofate
• Other Study ID Numbers: SL-B2025-503-02

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