PULSAR Combined With Immunotherapy and Chemotherapy

Phase I/II Clinical Study of Personalized Ultra-fractionated Stereotactic Adaptive Radiotherapy (PULSAR) Combined With Immunotherapy and Chemotherapy in Patients With Cholangiocarcinoma

The primary objective of this study is to evaluate the efficacy and safety of PULSAR in combination with dual immune checkpoint inhibitors (PD-1 monoclonal antibody + CTLA-4 monoclonal antibody) and GC chemotherapy in patients with locally advanced or metastatic cholangiocarcinoma. The secondary objective of this study is to investigate the immunological impact of PULSAR combined with dual immune therapy (PD-1 monoclonal antibody + CTLA-4 monoclonal antibody) on the tumor microenvironment and systemic immune responses in cholangiocarcinoma patients.

Study Overview

• Status: Recruiting
• Conditions: Cholangiocarcinoma
• Intervention / Treatment: Drug: Iparomlimab and Tuvonralimab Injection (QL1706); Radiation: PULSAR

Detailed Description

After confirmation of eligibility, enrolled patients will undergo radiation CT simulation and planning per standard of care. IV contrast will be administered with CT simulation at the treating physician's discretion though is not required.

• Study Type: Interventional
• Enrollment (Estimated): 60
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: Dr. shu; Phone Number: + 028 85423609; Email: peishu1991@sina.com

Study Locations

• China
  • Sichuan
    • Chengdu, Sichuan, China, 610041
      • Recruiting
      • West China Hospital
      • Contact: shu pei; Phone Number: +86 028 85422654; Email: peishu1991@sina.com

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

1. Signed informed consent. The subject has fully understood and accepted the purpose, content, expected efficacy, mechanism of action, and risks of the study, and has signed the informed consent form.
2. Age 18-75 years, regardless of gender.
3. Histopathologically or cytologically confirmed locally advanced or metastatic cholangiocarcinoma.
4. At least one measurable lesion based on RECIST 1.1 criteria.
5. ECOG performance status score of 0-1.
6. Expected survival time ≥3 months.
7. Willing to comply with study procedures and able to undergo treatment (including radiotherapy, immunotherapy, chemotherapy) and follow-up.
8. No contraindications to the use of PD-1, PD-L1 inhibitors, gemcitabine, or cisplatin.
9. No contraindications to radiotherapy.
10. Organ function levels meet the following requirements: - Absolute neutrophil count (ANC) ≥ 1.5 × 10⁹/L; - Platelet (PLT) count ≥ 80 × 10⁹/L; - Hemoglobin (Hb) level ≥ 90 g/L; - Total bilirubin (TBil) level ≤ 1.5 times the upper limit of normal (ULN); - Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels ≤ 2.5 times ULN; if liver metastases are present, ≤ 5 times ULN; - Serum creatinine ≤ 1.5 times ULN, or calculated creatinine clearance rate ≥ 50 ml/min; - International normalized ratio (INR) ≤ 1.5 times ULN, and prothrombin time (PT) or activated partial thromboplastin time (APTT) ≤ 1.5 times ULN, unless the subject is receiving anticoagulant therapy. - Hepatitis B surface antigen (HBsAg) positive with peripheral blood hepatitis B virus DNA (HBV-DNA) titer ≤ 1 × 10³ copies/L; if HBsAg positive and peripheral blood HBV-DNA titer ≥ 1 × 10³ copies/L, subjects may be included if the investigator determines that the chronic hepatitis B is stable and poses no additional risk.
11. Women of childbearing potential must agree to use appropriate contraceptive measures during the study period. Additionally, a serum or urine pregnancy test performed within 24 hours prior to the initiation of chemotherapy must be negative.
12. Women must be non-lactating.

Exclusion Criteria:

1. Previously treated with anti-PD-1 or anti-PD-L1 antibodies.
2. Received any investigational drug treatment within 4 weeks prior to the first administration of the study drug.
3. Simultaneous participation in other clinical studies, unless it is an observational (non-interventional) clinical study or the follow-up phase of an interventional clinical study.
4. Previously received radiotherapy to the upper abdomen.
5. Uncontrolled severe diseases that the investigator considers may affect the subject's ability to receive study protocol treatment, such as severe cardiac disease, cerebrovascular disease, uncontrolled diabetes, uncontrolled hypertension, uncontrolled infections, active peptic ulcers, etc.
6. Active known or suspected autoimmune diseases (including but not limited to uveitis, enteritis, hepatitis, hypophysitis, nephritis, vasculitis, hyperthyroidism, hypothyroidism, and asthma requiring bronchodilator treatment). Patients with hypothyroidism requiring hormone replacement therapy and those with skin conditions not requiring systemic treatment (such as vitiligo, psoriasis, or alopecia) may be included.
7. Active tuberculosis infection. Patients with active pulmonary tuberculosis infection within the past year will be excluded, even if treated. Patients with a history of active pulmonary tuberculosis infection more than one year ago will also be excluded unless evidence is provided that they have undergone standard anti-tuberculosis treatment.
8. Patients requiring long-term systemic corticosteroid therapy (equivalent to >10 mg prednisone/day) or any other form of immunosuppressive therapy. Patients using inhaled or topical corticosteroids may be included.
9. Uncontrolled cardiac disease, such as: New York Heart Association (NYHA) Class II or higher heart failure; unstable angina; myocardial infarction within the past year; clinically significant supraventricular or ventricular arrhythmias requiring treatment or intervention. Additionally, dementia, altered mental status, or any psychiatric disorders that could impair the ability to understand, provide informed consent, or complete questionnaires.
10. History of allergy or hypersensitivity to any component of the treatment.
11. History of malignant tumors within the past 5 years, except for completely treated basal cell carcinoma or squamous cell carcinoma of the skin, localized prostate cancer after radical surgery, or ductal carcinoma in situ of the breast after radical surgery.
12. Previously received systemic therapy for cholangiocarcinoma.
13. Positive for hepatitis C virus (HCV) antibodies or human immunodeficiency virus (HIV) antibodies.
14. Active infection requiring systemic treatment.
15. Other conditions deemed unsuitable for inclusion by the investigator.

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: PULSAR Combined with Immunotherapy and Chemotherapy	Drug: Iparomlimab and Tuvonralimab Injection (QL1706); GC chemotherapy and Iparomlimab and Tuvonralimab Injection; Other Names: chemotherapy; Radiation: PULSAR; Personalized Ultra-fractionated Stereotactic Adaptive Radiotherapy

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Safety of immunotherapy and chemotherapy combined with PULSAR radiation therapy	Evaluation of reported adverse events (AEs) and serious adverse events (SAEs), according to CTCAE v5.0. Evaluation of changes from Baseline during the Treatment and Follow-up periods	Baseline, every three weeks in the treatment period, 30 days and 3 months after treatment

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
immunological impact of immunotherapy and chemotherapy combined with PULSAR radiation therapy	Evaluation of immunological impact of PULSAR combined with dual immune therapy (PD-1 monoclonal antibody + CTLA-4 monoclonal antibody) on the tumor microenvironment and systemic immune responses in cholangiocarcinoma patients according to flow cytometry. Evaluation of changes from Baseline during the Treatment and Follow-up periodsTo investigate the	Baseline, every three weeks in the treatment period, 30 days and 3 months after treatment

Collaborators and Investigators

• Sponsor: Wang Xin

Study record dates

Study Major Dates

• Study Start (Actual): November 4, 2025
• Primary Completion (Estimated): September 10, 2026
• Study Completion (Estimated): September 10, 2027

Study Registration Dates

• First Submitted: August 29, 2025
• First Submitted That Met QC Criteria: December 5, 2025
• First Posted (Actual): December 18, 2025

Study Record Updates

• Last Update Posted (Actual): December 18, 2025
• Last Update Submitted That Met QC Criteria: December 5, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: chemotherapy; immunotherapy; PULSAR; locally advanced or metastatic cholangiocarcinoma
• Additional Relevant MeSH Terms: Neoplasms; Neoplasms by Histologic Type; Neoplasms, Glandular and Epithelial; Adenocarcinoma; Carcinoma; Cholangiocarcinoma; Therapeutics; Carbohydrates; Polysaccharides; Glucans; Dextrans; Drug Therapy; DEAE-Dextran
• Other Study ID Numbers: PULSAR-ICON

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

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