Clinical trial Recruiting at 1 site Phase 1 Interventional Ages 18 and up

Evaluating a new treatment combining low dose radiotherapy and immunotherapy for bulky tumors

Official title: Safety and Tolerability of Low Dose Radiotherapy Plus Concurrent Partial Stereotactic Ablative Radiotherapy (Eclipse-RT) and Tislelizumab in Patients With Bulky Tumors

Run by Sichuan University · NCT06349837 · Data updated 2026-11-12

This study is testing a new treatment that combines low dose radiation and an immunotherapy drug to see if it can help people with large tumors that haven't improved with standard treatments.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment24 (estimated)
SponsorSichuan University
Academic / other
Drugs / interventionschemotherapy, radiation, Tislelizumab
Locations1 site (Chengdu, Sichuan)
StatusRecruiting
StartedApril 18, 2024
Main results expectedMarch 31, 2028
Study endsNovember 30, 2028
Registry record updatedMay 1, 2026
Trial IDNCT06349837 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older with stage IV non-small cell lung cancer (NSCLC) who have failed standard therapies.

Probably not a fit

Patients with active central nervous system metastases or those who are not suitable for repeat biopsies may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This phase I clinical trial aims to assess the safety and tolerability of low dose radiotherapy (LDRT) combined with partial Stereotactic Ablative Radiotherapy (SBRT) and the immunotherapy drug Tislelizumab in patients with bulky tumors who have not responded to standard treatments. The study will enroll at least 9 participants, using a 3+3 dose escalation design to determine the maximum tolerated doses and observe any dose-limiting toxicities. Participants will receive LDRT and SBRT at varying doses alongside Tislelizumab, administered every three weeks until disease progression or unacceptable side effects occur.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with advanced bulky tumors who have exhausted standard treatment options.

How similar studies have gone: While this specific combination of therapies is novel, similar approaches using immunotherapy and radiotherapy have shown promise in other studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Be willing and able to provide written informed consent/assent for the trial.
2. Be ≥18 years of age on day of signing informed consent.
3. Patients with histologically or cytologically confirmed stage IV solid tumours.
4. Be willing to undergo repeat biopsy of tumor lesions according to the study protocol.
5. Patients who have failed the standard therapy, or who are unsuitable for standard treatment, or refuse chemotherapy.
6. At least one measurable lesion according to RECIST 1.1. A lesion that has previously received radiotherapy can be considered a target lesion only if this lesion is clearly progressed after radiotherapy.
7. The target lesions (irradiated lesions) are \> 5cm in in diameter
8. ECOG 0-2.
9. Life expectancy of \> 3 months.
10. Subjects should agree to use an adequate method of contraception.

Exclusion Criteria:

1. Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis and/or spinal cord compression, etc.
2. With oncologic emergencies that require immediate treatment
3. EGFR/ALK/ROS-1 mutation or mutation status unknown.
4. Has evidence of interstitial lung disease or active and/or non-infectious pneumonitis (drug-induced pneumonia, radiation-induced pneumonia, etc.) requiring steroid therapy.
5. History of pulmonary fibrosis, pulmonary hypertension, severe irreversible airway obstruction disease
6. Patients with peripheral neuropathy.
7. Significant heart disease or impairment of cardiac function
8. Fluid accumulating in the third space, such as pericardial effusion, pleural effusion and peritoneal effusion that remains uncontrolled by aspiration or other treatment
9. Known allergy to drugs or excipients, known severe allergic reaction to any of the PD-1 monoclonal antibodies
10. Known allogeneic organ transplantation (except corneal transplantation) or allogeneic hematopoietic stem cell transplantation.

Where it's running

  • West China Hospital, Sichuan University
    Chengdu, Sichuan, China
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.