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Rectal Cancer PatientsPhase 2NCT07291401

Radiotherapy Plus CAPOX, and Iparomlimab and Tuvonralimab (QL1706) as Neoadjuvant Therapy for LARC

A Phase 2 study testing lparomlimab and Tuvonralimab Injection and CPAOX and radiotherapy in people with Rectal Cancer Patients, run by Zhongnan Hospital at 1 site in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This study is a single-center, prospective, single-arm, open-label, Phase II clinical trial designed to evaluate the efficacy of radiotherapy combined with CAPOX, and Iparomlimab and Tuvonralimab (QL1706) as neoadjuvant therapy for locally advanced rectal cancer. Read more about this study

Who is it for?
Ages 18 to 75 years
Conditions the study is for
Rectal Cancer Patients
What is being tested?
lparomlimab and Tuvonralimab Injection and CPAOX and radiotherapy
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
108 participants
Where
1 siteChina
Study dates
1 Nov 2025to 1 Jan 2029
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 75 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • (1) The patient is histologically diagnosed with rectal adenocarcinoma. (2) Age ≥18 years, <75 years (3) Eastern Cooperative Oncology Group (ECOG) performance status score of 0-1 (4) AJCC stage of rectal cancer: cT3-4N0M0 or TanyN1-2M0 (5) The lower margin of the rectal tumor is ≤10cm from the anus. (6) At least one evaluable lesion based on RECIST 1.1 assessment. (7) Subjects should have adequate bone marrow and liver and kidney function reserves:
  • Neutrophils ≥1.5×10⁹/L, platelets ≥75×10⁹/L, and hemoglobin ≥9 g/dL
  • Total bilirubin ≤1.5×Upper limit of normal (UNL); ASAT (SGOT) and/or ALAT (SGPT) ≤2.5×UNL (≤5×UNL if liver metastasis occurs); alkaline phosphatase ≤2.5×UNL (≤5×UNL if liver metastasis occurs, ≤10×UNL if bone metastasis occurs); LDH <1500 U/L
  • Creatinine clearance (calculated according to the Cockcroft and Gault formula) >60 mL/min or serum creatinine ≤1.5×UNL; (8) Voluntarily participate in this study and sign the informed consent form

Who cannot join

  • (1) Histopathological examination confirms the presence of other pathological types, such as squamous cell carcinoma, undifferentiated carcinoma, neuroendocrine carcinoma, etc.
  • Pathological examination confirms microsatellite highly unstable dMMR/msi-H (3) Presence of intestinal obstruction, intestinal perforation, bleeding, or other conditions requiring emergency surgery (4) History of pelvic radiotherapy (5) Comorbid malignant tumors (excluding cervical carcinoma in situ that has been cured for more than 2 years) (6) Receiving any other anti-tumor treatment (chemotherapy, radiotherapy, surgery, targeted therapy, immunotherapy) or participating in other new drug clinical trials within the past 4 weeks (7) Presence of the following cardiovascular and cerebrovascular diseases or risks:
  • Myocardial infarction, unstable angina, cerebrovascular accident, transient ischemic attack, acute or persistent myocardial ischemia, symptomatic heart failure (Class 2 or above as determined by the New York Heart Association functional classification) within 6 months prior to randomization, symptomatic or poorly controlled arrhythmia
  • 3 years prior to first use of the drug a. History of pulmonary embolism or other serious thromboembolism within the past month
  • Presence of aortic aneurysm, aortic dissection aneurysm, internal carotid artery stenosis or other major vascular diseases that may endanger life or require surgery within the past 6 months
  • History of myocarditis or cardiomyopathy or current examination suggests myocarditis
Show all 20Show fewer
  • Left ventricular ejection fraction (LVEF) <50%
  • Complete left bundle branch block, third-degree atrioventricular block (8) Active autoimmune disease requiring systemic treatment within 2 years prior to the start of study treatment, or an autoimmune disease that the investigator judges may relapse or is planned for treatment. The following are excluded:
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  • Skin diseases that do not require systemic treatment (e.g., vitiligo, alopecia, psoriasis, or eczema)
  • Hypothyroidism caused by autoimmune thyroiditis that requires only stable doses of hormone replacement therapy
  • Type I diabetes that requires only stable doses of insulin replacement therapy
  • Childhood asthma that has completely resolved and requires no intervention in adulthood
  • The investigator determines that the disease will not recur without external triggering factors (9) Known or suspected active pulmonary tuberculosis (10) Subjects with active hepatitis B, inactive or asymptomatic hepatitis B virus (HBV) carriers (HBsAg positive) with HBV DNA > 500 IU/mL or > 2500 copies/mL), and subjects with active hepatitis C should be excluded. Inactive or asymptomatic carriers of hepatitis B who are treated and stable and meet the criteria of HBV DNA ≤500 IU/mL or ≤2500 copies/mL are eligible for enrollment. Subjects with cured hepatitis C who are HCVAb positive and HCV RNA negative are eligible for enrollment. (11) Subjects who require systemic treatment with glucocorticoids (>10 mg/day prednisone or equivalent dose) or other immunosuppressive drugs within 14 days prior to randomization. The following are exceptions:
  • Inhaled, ophthalmic, or topical corticosteroids are permitted if there is no active autoimmune disease.
  • Corticosteroids are used as a pretreatment for infusion-related reactions or allergic reactions (e.g., medication before CT scans).
  • Pregnant or lactating women (13) Patients with currently uncontrolled comorbidities, such as decompensated cirrhosis, nephrotic syndrome, uncontrolled hyperglycemia, uncontrolled metabolic disorders, severe active peptic ulcer disease or gastritis, severe bleeding tendency, or coagulation disorders.
  • Patients with known allergies to any component of the study drug (oxaliplatin, capecitabine, QL1706); a history of severe allergic reactions to other monoclonal or bispecific antibodies; or known allergies to multiple substances or severe allergic diseases.
  • Patients who have received a live vaccine within 30 days prior to randomization or who plan to receive a live vaccine during the study period.
  • Patients with cognitive impairment or severe comorbid mental disorders, or those deemed by the investigator to have poor chemotherapy adherence; or other cases deemed unsuitable for participation in clinical trials by the investigator.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

China1 site, 1 recruiting
  • Zhongnan Hospital of Wuhan University

    Wuhan, Hubei, 430071

    Yongchang Wei, M.D., +8617771886922, weiyongchang@whu.edu.cn

    Recruiting

Other trials in China

About this study

Official title: Neoadjuvant Chemoradiotherapy Combined Cith Iparomlimab and Tuvonralimab (QL1706) Therapy for Locally Advanced Rectal Cancer:a Single-center, Prospective, Single-arm, Open-label, Phase II Clinical Trial

This study is a single-center, prospective, single-arm, open-label, Phase II clinical trial designed to evaluate the efficacy of radiotherapy combined with CAPOX, and Iparomlimab and Tuvonralimab (QL1706) as neoadjuvant therapy for locally advanced rectal cancer. Additionally, the study seeks to explore the relationship between biomarkers in blood and tumor tissue and treatment efficacy.

Eligible participants (locally advanced rectal cancer) received pelvic radiotherapy (36 Gy/12 fractions; adaptive boost 6 Gy/2 fractions to GTVp/GTVn permitted) with one cycle of concurrent CAPOX during the first week (oxaliplatin 100 mg/m² IV D1; capecitabine 850 mg/m² PO bid). Two weeks after radiotherapy, four cycles of immunotherapy plus chemotherapy were given (iparomlimab and tuvonralimab 5 mg/kg IV D1; oxaliplatin 130 mg/m² IV D1; capecitabine 1000 mg/m² PO bid D1-14, Q3W). Two to three weeks after immunochemotherapy, surgery was performed (TME or intersphincteric resection with sphincter preservation (ISR) ), followed by adjuvant CAPOX. The primary endpoint was pathological complete response (pCR) rate.

Read the detailed description

Improving the tumor downstaging rate and complete response rate of neoadjuvant therapy remains a key focus and hot topic in clinical research. Neoadjuvant immunotherapy has been recommended by clinical guidelines for locally advanced rectal cancer (LARC) with DNA mismatch repair deficiency/high microsatellite instability (dMMR/MSI-H), achieving a pCR rate as high as 60-70%. However, the efficacy of immunotherapy in locally advanced rectal cancer with microsatellite stable disease (pMMR/MSS), which accounts for the vast majority, remains controversial. Recent phase II studies have shown that combining chemotherapy and immunotherapy with long-course or short-course radiotherapy may further improve the pCR rate to 30-40% compared to traditional concurrent chemoradiotherapy. In a study by Professor Zhang Zhen's team at Fudan University, short-course radiotherapy combined with consolidation or induction chemotherapy and immunotherapy even achieved a cCR rate exceeding 50%. A meta-analysis published in 2025 also showed that in pMM locally advanced rectal cancer patients receiving neoadjuvant radiotherapy combined with immunotherapy, patients receiving short-course radiotherapy combined with PD-1 inhibitors or concurrent immunoradiotherapy showed better treatment outcomes, while the toxic side effects were tolerable. However, these studies have small sample sizes, lack consistency in drug use and study design, and have insufficient levels of evidence, requiring further exploration and verification.

This study will explore the efficacy and safety of neoadjuvant chemoradiotherapy combined with erato combination antibody for the treatment of locally advanced pMMR rectal cancer through a prospective phase II randomized controlled clinical trial, aiming to provide a reference for achieving higher cCR/pCR rates and preservation of anal function in patients with locally advanced rectal cancer.

Specifically, the study will assess the pathological complete response (pCR) rate two weeks after neoadjuvant therapy, the clinical complete response (cCR) rate under the "watch-and-wait" strategy, R0 resection rate, tumor regression grade (TRG), and sphincter preservation rate. Additionally, the study will evaluate the 3-year disease-free survival (DFS) and overall survival (OS) following dual-inhibitor combined neoadjuvant chemoradiotherapy. The safety and tolerability of this combination therapy will also be comprehensively assessed based on NCI-CTCAE 4.03 criteria.

Being tested
lparomlimab and Tuvonralimab Injection and CPAOX and radiotherapy

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • lparomlimab and Tuvonralimab Injection and CPAOX and radiotherapyCombination product

    Patients received pelvic radiotherapy (36 Gy/12 fractions; adaptive boost 6 Gy/2 fractions to GTVp/GTVn permitted) with one cycle of concurrent CAPOX during the first week (oxaliplatin 100 mg/m² IV D1; capecitabine 850 mg/m² PO bid). Two weeks after radiotherapy, four cycles of immunotherapy plus chemotherapy were given (iparomlimab and tuvonralimab 5 mg/kg IV D1; oxaliplatin 130 mg/m² IV D1; capecitabine 1000 mg/m² PO bid D1-14, Q3W). Two to three weeks after immunochemotherapy, surgery was performed (TME or intersphincteric resection with sphincter preservation (ISR) ), followed by adjuvant CAPOX. The primary endpoint was pathological complete response (pCR) rate.

Study groups in NCT07291401
Study groupRoleWhat they receive
Group AExperimentalGroup A patients received radiotherapy, chemotherapy, and immunotherapy. During the first week of radiotherapy, they received one cycle of CAPOX concurrent chemoradiotherapy. Two weeks after the completion of radiotherapy, they continued with four cycles of CAPOX combined with QL1706 immunotherapy.
Receives: Combination Product: lparomlimab and Tuvonralimab Injection and CPAOX and radiotherapy

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Complete response (CR)

    Complete response: Pathological complete response and clinical complete response

    Measured: 1 year

Secondary outcomes (5)
  1. R0 Resection Rate

    The proportion of surgical patients who achieve an R0 resection. R0 resection: All gross disease has been removed, and microscopic examination reveals all surgical margins free of tumor.

    Measured: 1 year

  2. Organ Preservation Rate (OPR)

    The 1-year organ preservation rate is the percentage of patients attaining a complete clinical response (cCR) or near-complete clinical response (near-cCR) following neoadjuvant therapy, who then proceeded with non-surgical management or local excision, was monitored under a Watch \& Wait strategy or for 1 year post-local resection without undergoing radical surgery.

    Measured: 1 year

  3. Disease-free survival (DFS)

    DFS is defined as the time from randomization to the earliest occurrence of any of the following events:

    Tumor progression by imaging according to RECIST 1.1, Tumor recurrence (local or distant), confirmed by imaging or biopsy, for patients with no residual tumor after surgery, Death from any cause. Note: A second primary malignancy is not considered an DFS event.

    Measured: 3 years

  4. Overall survival (OS)

    The time interval between the date of randomization to the date of death. If the patient has been alive, the time until the last follow-up is taken as the overall survival period.

    Measured: 3 years

  5. Incidence of adverse events

    Assessed by Common Terminology Criteria for Adverse Events version 4.0. The overall adverse event rates and the immune-related adverse event rates will be compared between treatment arms using Chi-square test or Fisher's exact test, as appropriate.

    Measured: During neoadjuvant chemoradiotherapy combined with immunotherapy, an average of 6 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 Dec 2025
  2. Study start1 Nov 2025
  3. Primary completion1 Jan 2027 (estimated)
  4. Study completion1 Jan 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
108 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07291401
Sponsor's protocol ID
2025056
Status last verified
Sep 2026
First submitted
5 Dec 2025
Last updated
21 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing lparomlimab and Tuvonralimab Injection and CPAOX and radiotherapy in people with Rectal Cancer Patients, run by Zhongnan Hospital at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 20 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 21 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Yongchang Wei (+8617771886922, weiyongchang@whu.edu.cn), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Complete response (CR) (time frame: 1 year). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Sep 2026.

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