QL1706 Plus Bevacizumab for Unresectable or Metastatic MSI-H/dMMR CRC

Phase 2

Not yet recruiting

• Conditions: Unresectable Colorectal Cancer; Metastatic Colorectal Cancer (CRC); MSI-H/dMMR Colorectal Cancer
• Interventions: Drug: QL1706; Drug: Bevacizumab

• Registration Number: NCT07009145
• Lead Sponsor: Qianfoshan Hospital

Brief Summary

This is a single-arm, multi-center, exploratory study evaluating the efficacy and safety of iparomlimab and tuvonralimab (QL1706) in combination with bevacizumab for the treatment of patients with microsatellite instability-high (MSI-H) or mismatch repair-deficient (dMMR) unresectable or metastatic colorectal cancer. Eligible participants who meet the inclusion and exclusion criteria will provide written informed consent and receive QL1706 at 5.0 mg/kg and bevacizumab at 7.5 mg/kg on Day 1 of every 3-week cycle (Q3W), until disease progression or completion of 2 years of treatment. The primary endpoint of this study is objective response rate (ORR). Secondary endpoints include disease control rate (DCR), duration of response (DoR), progression-free survival (PFS), overall survival (OS), PFS and OS rates at 6, 12, and 24 months, and safety.

Detailed Description

Not available

Study Timeline

• Status Verified: 2025-05
• Study First Submitted: 2025-05-28
• Study First Submitted QC: 2025-05-28
• Last Update Submitted: 2025-05-28
• Study First Posted: 2025-06-06
• Last Update Posted: 2025-06-06
• Study Start: 2025-06-27
• Primary Completion: 2026-06-30
• Study Completion: 2027-12-31

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 22

Inclusion Criteria

• Voluntarily signs the informed consent form.
• Aged between 18 and 80 years (inclusive) at the time of consent; no gender restriction.
• Histologically confirmed unresectable locally advanced or metastatic colorectal cancer.
• At least one measurable target lesion according to RECIST v1.1.
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
• No prior immunotherapy for unresectable locally advanced or metastatic colorectal cancer.
• If previously treated with standard neoadjuvant or adjuvant therapy, the interval from the last dose to the first study treatment must be ≥ 6 months.
• Willing and able to provide tumor tissue and blood samples for MSI, RAS, BRAF, and PD-L1 testing.
• Estimated life expectancy of ≥ 12 months.
• Appropriate laboratory values must be met at screening.
• Female participants must be non-lactating, and have a negative pregnancy test result prior to enrollment.
• Participants of childbearing potential must agree to use effective contraception from the time of informed consent until at least 180 days after the last dose of study treatment.

Exclusion Criteria

• Known history of severe allergic reactions to iparomlimab and tuvonralimab or bevacizumab.
• Active malignancy other than colorectal cancer within 5 years prior to first treatment.
• Large tumor lesions, especially those previously irradiated, with signs of bleeding.
• Imaging showing tumor invasion of major blood vessels (e.g., pulmonary artery or superior vena cava), including encasement or invasion of the vessel lumen.
• Brain metastases (asymptomatic or treated symptomatic brain metastases stable for >4 weeks allowed).
• Active autoimmune disease requiring systemic treatment.
• Active pulmonary diseases such as tuberculosis, radiation pneumonitis, drug-induced pneumonitis, or severe pulmonary dysfunction during screening.
• Requirement for long-term or high-dose NSAIDs (aspirin >325 mg) or anticoagulant therapy.
• History of severe gastrointestinal events within 6 months prior to first treatment.
• Severe intestinal obstruction symptoms or signs and unretrieved intestinal stents at screening.
• Cardiovascular or cerebrovascular diseases including but not limited to: NYHA class > II heart failure; unstable or severe angina; myocardial infarction or stroke within 6 months; atrial fibrillation or other arrhythmias requiring treatment; symptomatic superior vena cava syndrome; prolonged QT interval (male QT > 450 ms; female QTc > 470 ms); uncontrolled hypertension despite medication (SBP >140 mmHg and/or DBP >90 mmHg) or history of hypertensive crisis or encephalopathy.
• Known bleeding disorders or coagulopathies.
• Uncontrolled pleural, pericardial, or ascitic effusions requiring drainage.
• Active infection or unexplained fever >38.5°C at screening (cancer-related fever allowed).
• Use of systemic broad-spectrum antibiotics within 30 days prior to first treatment.
• Systemic corticosteroids (>10 mg prednisone equivalent daily) or immunosuppressants within 14 days prior to first treatment, or immunostimulants within 4 weeks.
• Major surgery, severe fractures, or therapeutic clinical trials within 4 weeks prior to first treatment; herbal treatment within 2 weeks.
• Ongoing adverse events from prior antitumor therapy greater than grade 1.
• HIV infection, other congenital or acquired immunodeficiencies, or history of organ or allogeneic bone marrow transplantation (except corneal transplantation).
• Positive hepatitis B surface antigen (HBsAg) and/or hepatitis B core antibody (HBcAb) with HBV DNA >10⁴ copies/mL (~2000 IU/mL); or positive hepatitis C antibody with HCV RNA >10³ copies/mL; co-infection with HBV and HCV excluded.
• Vaccination with live or attenuated vaccines within 30 days prior to first treatment.
• Prior treatment with immune checkpoint inhibitors (e.g., anti-PD-1, anti-PD-L1, anti-CTLA-4, anti-OX-40, anti-CD137).
• Prior adjuvant targeted therapy against EGFR, VEGF, or VEGFR (e.g., bevacizumab, cetuximab, panitumumab, apatinib, regorafenib, anlotinib).
• Psychiatric disorders, epilepsy, dementia, or substance abuse that may affect compliance.
• Other conditions or lab abnormalities that may interfere with study participation or confound results as judged by investigators or sponsors.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
QL1706 + Bevacizumab	QL1706	-
QL1706 + Bevacizumab	Bevacizumab	-

Primary Outcome Measures

Name	Time	Method
ORR	approximately 6 months after the last subject participating in	The proportion of subjects with complete response (CR) and partial response (PR) according RESIST1.1 in total subjects

Secondary Outcome Measures

Name	Time	Method
DCR	approximately 12 months after the last subject participating in	The proportion of subjects with complete response (CR) and partial response (PR) and stable disease(SD) in total subjects
DOR	approximately 12 months after the last subject participating in	The time from the date for first documented response of complete response (CR) or partial response (PR) to the date of first documented of disease progression or death, whichever occurs first.
PFS	approximately 12 months after the last subject participating in	The time from the starting date of study drug to the date of first documentation of disease progression or death, whichever occurs first (per RECIST 1.1).
6/12/24 PFS rate	6/12/24 months after the last subject participating in	6/12/24 months survival rate based on PFS Kaplan-Meier curve
OS	approximately 12 months after the last subject participating in	The time from the starting date of study drug to the date of death due to any cause.
6/12/24 OS rate	6/12/24 months after the last subject participating in	6/12/24 months survival rate based on OS Kaplan-Meier curve
Safety (adverse event)	Up to approximately 2 years	The rates of adverse events based on NCI CTCAE v5.0

Trial Locations

Locations (1)

The First Affiliated Hospital of Shandong First Medical University; 🇨🇳 Jinan, Shandong, China