Early Low Rectal CancerPhase 2NCT07837362
SCRT Combined With CAPOX and PD-1/CTLA4 Antibody for Early-stage Low Rectal Cancer
A Phase 2 study testing Shor-course radiotherapy, PD-1/CTLA4 Antibody and Capecitabine in people with Early Low Rectal Cancer, run by Fudan University at 1 site in China.
Trial summary
The study evaluates the combination of immunotherapy of PD-1/ CTLA4 antibody and neoadjuvant short-course radiotherapy in early low rectal cancer. A total of 34 patients will receive 5*5Gy short-course radiotherapy, followed by 4 cycles of capecitabine plus oxaliplatin (CAPOX) chemotherapy and PD-1/ CTLA4 antibody… Read more about this study
- Who is it for?
- Ages 18 to 75 years
- Conditions the study is for
- Early Low Rectal Cancer
- What is being tested?
- Shor-course radiotherapy, PD-1/CTLA4 Antibody and Capecitabine
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 34 participants
- Where
- 1 siteChina
- Study dates
- 1 Sep 2026to 31 Dec 2028
- 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
- age 18-75 years old, female and male
- pathological confirmed adenocarcinoma
- clinical stage T1-3bN0, tumor maximum diameter less than 4cm
- the distance from anal verge less than 5 cm
- without distance metastases
- KPS >=70
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- with good compliance
- microsatellite repair status is MSS/pMMR
- without previous anti-cancer therapy or immunotherapy
- signed the inform consent
Who cannot join
- pregnancy or breast-feeding women
- pathological confirmed signet ring cell carcinoma
- clinical stage T1N0 and can be resected locally
- history of other malignancies within 5 years
- serious medical illness, such as severe mental disorders, cardiac disease, uncontrolled infection, etc.
- immunodeficiency disease or long-term using of immunosuppressive agents
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- baseline blood and biochemical indicators do not meet the following criteria: neutrophils≥1.5×10^9/L, Hb≥90g/L, PLT≥100×10^9/L, ALT/AST ≤2.5 ULN, Cr≤ 1 ULN
- DPD deficiency
- allergic to any component of the therapy
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
Fudan University Shanghai Cancer Center
Shanghai, Shanghai Municipality, 200030
About this study
Official title: The Combination of PD-1/CTLA4 Antibody and Neoadjuvant Short-course Radiotherapy in Early-stage Low Rectal Cancer
The study evaluates the combination of immunotherapy of PD-1/ CTLA4 antibody and neoadjuvant short-course radiotherapy in early low rectal cancer. A total of 34 patients will receive 5*5Gy short-course radiotherapy, followed by 4 cycles of capecitabine plus oxaliplatin (CAPOX) chemotherapy and PD-1/ CTLA4 antibody, finally receive the local excision(TEM) or total mesorectal excision (TME). The rate of complete response (cCR+pCR), Organ retention rate, long-term prognosis, and adverse effects will be analyzed.
- Conditions
- Early Low Rectal Cancer
- Being tested
- Shor-course radiotherapy, PD-1/CTLA4 Antibody, Capecitabine, Oxaliplatin
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Shor-course radiotherapyRadiation
Shor-course radiotherapy: 25Gy/5Fx
PD-1/CTLA4 AntibodyDrug
Iparomlimab and Tuvonralimab, 5mg/kg, d1 q3w
CapecitabineDrug
Capecitabine: 1000mg/m2 d1-14 q3w
OxaliplatinDrug
130mg/m2 d1 q3w
| Study group | Role | What they receive |
|---|---|---|
| Treatment Arm | Experimental | A total of 34 patients will receive 5*5Gy short-course radiotherapy, followed by 4 cycles of CAPOX chemotherapy and PD-1/CTLA4 antibody, finally receive the TEM or TME surgery. Receives: Radiation: Shor-course radiotherapy; Drug: PD-1/CTLA4 Antibody; Drug: Capecitabine; Drug: Oxaliplatin |
What is being measured
The primary outcome is the main question the study is designed to answer.
complete response (CR) rate
Rate of complete response (CR), including the rate of pathologic complete response (pCR) after surgery and the rate of cCR with W\&W strategy.
Measured: From date of receiving neoadjuvant therapy, assessed up to 2 years
Secondary outcomes (6)
Organ preservation rate
Rate of patients who underwent organ preservation via WW or TEM after neoadjuvant therapy
Measured: From date of receiving neoadjuvant therapy, assessed up to 2 years
3 year disease free survival rate
Rate of 3 year disease free survival
Measured: From date of initiation of treatment until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 36 months
3 year local recurrence free survival rate
Rate of 3 year local recurrence free survival
Measured: From date of initiation of treatment until the date of first documented pelvic failure, assessed up to 36 months.
3 year overall survival rate
Rate of 3 year overall survival
Measured: From date of initiation of treatment until the date of death from any cause, assessed up to 36 months.
10 year Quality of Life
Patient self-assessment via EORTC QLQ-C30 questionnaire to monitor changes in quality of life throughout treatment.
Measured: From date of initiation of treatment until the date of death from any cause, assessed up to 10 years
Grade 3-4 adverse effects rate
Incidence and severity of treatment side effects graded by NCI CTCAE v5.0.
Measured: From date of initiation of treatment until the date of death from any cause, assessed up to 5 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Sep 2026
- Study start1 Sep 2026 (estimated)
- Primary completion31 Dec 2027 (estimated)
- Study completion31 Dec 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Early Low Rectal CancerStudies of the same condition, open and under way.
- More trials run by Fudan UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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
- 34 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Fudan University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Zhen Zhang, Fudan University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07837362
- Sponsor's protocol ID
- FDRT-2026-306-5158
- Status last verified
- Sep 2026
- First submitted
- 23 Aug 2026
- Last updated
- 23 Sep 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 23 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Combination of PD-1/CTLA4 Antibody and Neoadjuvant Short-course Radiotherapy in Early-stage Low Rectal Cancer
- ClinicalTrials.gov ID
- NCT07837362
- Acronym / sponsor ID
- FDRT-2026-306-5158
- Conditions
- Early Low Rectal Cancer
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 34 participants (estimated)
- Lead sponsor
- Fudan UniversityUniversity, hospital or other
- Study start
- 1 Sep 2026 (estimated)
- Primary completion
- 31 Dec 2027 (estimated)
- Study completion
- 31 Dec 2028 (estimated)
- First posted
- 23 Sep 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The study evaluates the combination of immunotherapy of PD-1/ CTLA4 antibody and neoadjuvant short-course radiotherapy in early low rectal cancer. A total of 34 patients will receive 5*5Gy short-course radiotherapy, followed by 4 cycles of capecitabine plus oxaliplatin (CAPOX) chemotherapy and PD-1/ CTLA4 antibody, finally receive the local excision(TEM) or total mesorectal excision (TME). The rate of complete response (cCR+pCR), Organ retention rate, long-term prognosis, and adverse effects will be analyzed.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Treatment Arm | Experimental | Radiation: Shor-course radiotherapy, Drug: PD-1/CTLA4 Antibody, Drug: Capecitabine, Drug: OxaliplatinA total of 34 patients will receive 5*5Gy short-course radiotherapy, followed by 4 cycles of CAPOX chemotherapy and PD-1/CTLA4 antibody, finally receive the TEM or TME surgery. |
Who may qualify
- Ages
- 18 to 75 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (10 listed)
- age 18-75 years old, female and male
- pathological confirmed adenocarcinoma
- clinical stage T1-3bN0, tumor maximum diameter less than 4cm
- the distance from anal verge less than 5 cm
- without distance metastases
Key exclusion criteria (9 listed)
- pregnancy or breast-feeding women
- pathological confirmed signet ring cell carcinoma
- clinical stage T1N0 and can be resected locally
- history of other malignancies within 5 years
- serious medical illness, such as severe mental disorders, cardiac disease, uncontrolled infection, etc.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Shor-course radiotherapyShor-course radiotherapy: 25Gy/5Fx | Radiation | Treatment Arm |
| PD-1/CTLA4 AntibodyIparomlimab and Tuvonralimab, 5mg/kg, d1 q3w | Drug | Treatment Arm |
| CapecitabineCapecitabine: 1000mg/m2 d1-14 q3w | Drug | Treatment Arm |
| Oxaliplatin130mg/m2 d1 q3w | Drug | Treatment Arm |
Primary outcome
complete response (CR) rate
Time frame: From date of receiving neoadjuvant therapy, assessed up to 2 years
Rate of complete response (CR), including the rate of pathologic complete response (pCR) after surgery and the rate of cCR with W\&W strategy.
6 secondary outcomes
Organ preservation rate
Time frame: From date of receiving neoadjuvant therapy, assessed up to 2 years
3 year disease free survival rate
Time frame: From date of initiation of treatment until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 36 months
3 year local recurrence free survival rate
Time frame: From date of initiation of treatment until the date of first documented pelvic failure, assessed up to 36 months.
3 year overall survival rate
Time frame: From date of initiation of treatment until the date of death from any cause, assessed up to 36 months.
10 year Quality of Life
Time frame: From date of initiation of treatment until the date of death from any cause, assessed up to 10 years
Grade 3-4 adverse effects rate
Time frame: From date of initiation of treatment until the date of death from any cause, assessed up to 5 years
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 Sep 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Shor-course radiotherapy, PD-1/CTLA4 Antibody and Capecitabine in people with Early Low Rectal Cancer, run by Fudan University 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 10 inclusion and 9 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: opening soon, as of the sponsor's last update on 23 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 Zhen Zhang, M.D, PH.D (18801735029 ext. 18801735029, zhen_zhang@fudan.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) rate (time frame: From date of receiving neoadjuvant therapy, assessed up to 2 years). 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 23 Sep 2026.