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Colorectal Cancer (CRC)Phase 3BASKETⅢNCT06791512

mFOLFOX6 + Bevacizumab + PD-1 Monoclonal Antibody Vs. mFOLFOX6 in Locally Advanced pMMR/MSS CRC

A Phase 3 study testing mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody and mFOLFOX6 in people with Colorectal Cancer (CRC) and pMMR/MSS Adenocarcinoma of the Colon or Rectum, run by Jun Huang 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

Neoadjuvant immunotherapy has shown promising therapeutic effects in mismatch repair-deficient or microsatellite instability-high (dMMR/MSI-H) colorectal cancer (CRC). However, for patients with mismatch repair-proficient or microsatellite stable (pMMR/MSS) CRC, the efficacy of PD-1 monoclonal antibody remains… Read more about this study

Who is it for?
Ages 18 to 80 years
What is being tested?
mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody and mFOLFOX6
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
166 participants
Where
1 siteChina
Study dates
18 Jan 2025to 31 Dec 2031
Phase
Phase 3
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 80 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Histologically confirmed adenocarcinoma of the colon or upper rectum.
  • Tumor biopsy immunohistochemical (IHC) identified pMMR, including all of the MSH1,MSH2,MSH6 and PMS2 protein expression and diagnosed as proficient mismatch repair(pMMR), or microsatellite stable (MSS) identified through next-generation sequencing or polymerase chain reaction.
  • Clinical staging of cT4NxM0, with or without positive mesorectal fascia (MRF), and with or without extramural vascular invasion (EMVI); imaging confirms that the lower margin of the tumor is located above the peritoneal reflection (colon or upper rectum).
  • Staging method: All patients must undergo chest, abdominal, and pelvic contrast-enhanced CT, rectal palpation, and high-resolution MRI. Positive perienteric lymph nodes (LNs) are defined as LNs with a short diameter ≥10 mm or LNs exhibiting typical metastatic shape and MRI characteristics. When staging results are contradictory, clinical data must be re-evaluated and confirmed by the central evaluation group. Distant metastases must be excluded through chest and abdominal contrast-enhanced CT and pelvic contrast-enhanced MRI.
  • No symptoms of intestinal obstruction, or obstruction successfully relieved by proximal colostomy.
  • No history of colorectal surgery.
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  • No prior chemotherapy or radiotherapy.
  • No history of biopharmaceutical treatments (e.g., monoclonal antibody ), immunotherapy (e.g., anti-PD-1, anti-PD-L1, anti-PD-L2, or anti-CTLA-4 antibodies), or treatment with investigational drugs.
  • Endocrine therapy history: Not restricted.
  • Signed informed consent obtained.

Who cannot join

  • Arrhythmias requiring anti-arrhythmic treatment (except β-blockers or Digoxin), symptomatic coronary artery disease, myocardial ischemia (myocardial infarction within the past 6 months), or congestive heart failure (CHF) > NYHA Class II.
  • Severe hypertension that is not well controlled by medication.
  • History of HIV infection or active chronic Hepatitis B or C (with high viral DNA load).
  • Active tuberculosis (TB), ongoing anti-TB treatment, or anti-TB treatment within 1 year prior to trial screening.
  • Other active severe infections as defined by NCI-CTCAE v5.0.
  • Evidence of distant metastasis beyond the pelvic region.
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  • Blood dyscrasias or organ dysfunction.
  • History of pelvic or abdominal radiotherapy.
  • Multiple colorectal cancer or multiple primary tumors.
  • Epilepsy requiring treatment (e.g., steroids or anti-epileptic drugs).
  • History of other malignancies within the past 5 years.
  • History of drug abuse, or medical, psychological, or social conditions that could interfere with patient participation or the evaluation of study results.
  • Any active autoimmune disease or a history of autoimmune disease (including but not limited to interstitial pneumonia, uveitis, enteritis, hepatitis, hypophysitis, nephritis, hyperthyroidism, hypothyroidism, and asthma requiring bronchodilators).
  • Administration of any live attenuated vaccine within 4 weeks prior to inclusion.
  • Long-term use of immunosuppressants or systemic/topical corticosteroids (dose >10 mg/day prednisolone or equivalent).
  • Known or suspected allergy to any study-related drug.
  • Any unstable condition that could compromise patient safety or compliance.
  • Pregnant or breastfeeding women, or women of childbearing potential not using effective contraception.
  • Refusal to provide signed informed consent.

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
  • The Sixth Affiliated Hospital, Sun Yat-sen University

    Guangzhou, Guangdong, 510655

    Jun Huang, MD, +8613926451242, huangj97@mail.sysu.edu.cn

    Recruiting

Other trials in China

About this study

Official title: mFOLFOX6 + Bevacizumab + PD-1 Monoclonal Antibody Versus mFOLFOX6 as Neoadjuvant Therapy for Locally Advanced pMMR/MSS Colorectal Cancer: A Prospective, Multicenter, Randomized Phase III Study (BASKETIII)

Neoadjuvant immunotherapy has shown promising therapeutic effects in mismatch repair-deficient or microsatellite instability-high (dMMR/MSI-H) colorectal cancer (CRC). However, for patients with mismatch repair-proficient or microsatellite stable (pMMR/MSS) CRC, the efficacy of PD-1 monoclonal antibody remains limited. Enhancing the efficacy of immunotherapy in pMMR/MSS CRC has become a key area of exploration. Additionally, for locally advanced (cT4NxM0) CRC patients, achieving R0 resection poses a significant challenge. Failure to achieve R0 resection often results in recurrence, severely impacting patient survival outcomes. Our previous phase II clinical study (BASKET Ⅱ) demonstrated that the neoadjuvant regimen of mFOLFOX6 combined with Bevacizumab and PD-1 monoclonal antibody significantly enhanced the immunotherapy sensitivity of locally advanced pMMR/MSS CRC, leading to improved pathological complete response (pCR) rates and higher R0 resection rates. This prospective, multicenter, randomized phase III trial aims to evaluate whether the neoadjuvant regimen of mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody can further improve pCR rate, enhance survival outcomes, and maintain an acceptable safety profile compared to mFOLFOX6 alone in pMMR/MSS locally advanced CRC patients.

Read the detailed description

This clinical trial is an open-label, prospective, multicenter, randomized phase III study. The aims of this study are to evaluate whether the the neoadjuvant regimen of mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody can improve the pathological complete response (pCR) rate, enhance survival outcomes, and maintain manageable toxicity compared to mFOLFOX6 alone in patients with locally advanced pMMR/MSS CRC. Eligible participants will be randomly assigned in a 1:1 ratio to either the experimental group or the control group. Participants in the experimental group will receive the neoadjuvant therapy regimen of mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody. And the first five doses will receive the neoadjuvant therapy regimen of mFOLFOX6 (intravenous oxaliplatin 85 mg/m2, leucovorin 400 mg/m2, 5-fluorouracil 400 mg/m2, and a 48-hour continuous infusion of 5-fluorouracil 2400 mg/m2) combined with sintilimab (200 mg, intravenous) and Bevacizumab (5 mg/kg, intravenous). The sixth dose will consist of the same regimen of mFOLFOX6 and PD-1 monoclonal antibody, but not plus bevacizumab, in order to allow sufficient withdrawal time of Bevacizumab for surgery. Participants in the control group will receive the neoadjuvant therapy regimen of mFOLFOX6 (intravenous oxaliplatin 85 mg/m2, leucovorin 400 mg/m2, 5-fluorouracil 400 mg/m2, and a 48-hour continuous infusion of 5-fluorouracil 2400 mg/m2) alone. Subjects in both the experimental and control groups will undergo radical surgical treatment after completing the neoadjuvant therapy. Those achieving pCR based on postoperative pathology will be regularly followed up according to the follow-up protocol. Participants who do not achieve pCR will receive six cycles of adjuvant therapy after surgery, followed by regular follow-up assessments as outlined in the protocol after completing the final cycle of adjuvant therapy. The primary outcome of this study is to evaluate the 3-year disease-free survival (DFS). Secondary objectives include the pCR rate, major pathological response (MPR) rate, neoadjuvant therapy-related toxicities, R0 resection rate, tumor downstaging rate, and overall survival (OS).

Being tested
mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody, mFOLFOX6
Keywords
Colorectal cancer, pMMR/MSS, Neoadjuvant Therapy, PD-1 monoclonal antibody, mFOLFOX6
Medical subject headings
Colorectal Neoplasms

What participants receive

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

  • mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibodyDrug

    Also called mFOLFOX6

    Participants in the experimental group will receive the neoadjuvant therapy regimen of mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody. And the first five doses received the neoadjuvant therapy regimen of mFOLFOX6 (intravenous oxaliplatin 85 mg/m2, leucovorin 400 mg/m2, 5-fluorouracil 400 mg/m2, and 5-fluorouracil 2400 mg/m2 continuous pumping for 48 hours) combined with sintilimab (200 mg, intravenous) and Bevacizumab (5 mg/kg, intravenous), and the sixth dose received the same regimen of mFOLFOX6 and PD-1 monoclonal antibody but not plus bevacizumab, in order to allow sufficient withdrawal time of Bevacizumab for surgery.

  • mFOLFOX6Drug

    Also called mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody

    Participants in the control group will receive the neoadjuvant therapy regimen of mFOLFOX6 (intravenous oxaliplatin 85 mg/m2, leucovorin 400 mg/m2, 5-fluorouracil 400 mg/m2, and 5-fluorouracil 2400 mg/m2 continuous pumping for 48 hours) alone.

Study groups in NCT06791512
Study groupRoleWhat they receive
Neoadjuvant therapy of mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibodyExperimentalParticipants will receive the first five doses of neoadjuvant therapy regimen of mFOLFOX6 (intravenous oxaliplatin 85 mg/m2, leucovorin 400 mg/m2, 5-fluorouracil 400 mg/m2, and a 48-hour continuous infusion of 5-fluorouracil 2400 mg/m2) combined with sintilimab (200 mg, intravenous) and Bevacizumab (5 mg/kg, intravenous). The sixth dose will consist of the same regimen of mFOLFOX6 and PD-1 monoclonal antibody, but not plus bevacizumab, in order to allow sufficient withdrawal time of Bevacizumab for surgery.
Receives: Drug: mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody
Neoadjuvant therapy of mFOLFOX6Active comparatorParticipants will receive the neoadjuvant therapy regimen of mFOLFOX6 (intravenous oxaliplatin 85 mg/m2, leucovorin 400 mg/m2, 5-fluorouracil 400 mg/m2, and a 48-hour continuous infusion of 5-fluorouracil 2400 mg/m2).
Receives: Drug: mFOLFOX6

What is being measured

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

  1. 3 years DFS Rate

    3 years Disease Free Survival Rate

    Measured: 3 years

Secondary outcomes (6)
  1. pCR rate

    pathological complete response rate

    Measured: 1 year

  2. MPR rate

    major pathologic response

    Measured: 1 year

  3. Toxicities Associated with Neoadjuvant Therapy

    Incidence of adverse events related to neoadjuvant therapy as assessed by CTCAE v5.0

    Measured: 1 year

  4. R0 resection rate

    R0 resection rate in participants

    Measured: 1 year

  5. Down-stage rate

    Down-stage rate of pathological stage after surgery compared with clinical stage before neoadjuvant therapy

    Measured: 1 year

  6. 3 years OS Rate

    3 years Overall Survival Rate

    Measured: 3 years

Timeline

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

  1. First posted24 Jan 2025
  2. Study start18 Jan 2025
  3. Primary completion31 Dec 2030 (estimated)
  4. Study completion31 Dec 2031 (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 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
166 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06791512
Sponsor's protocol ID
E2024365
Acronym
BASKETⅢ
Status last verified
Dec 2025
First submitted
19 Jan 2025
Last updated
24 Dec 2025
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 3 study testing mFOLFOX6 + Bevacizumab + PD-1 monoclonal antibody and mFOLFOX6 in people with Colorectal Cancer (CRC) and pMMR/MSS Adenocarcinoma of the Colon or Rectum, run by Jun Huang 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 19 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 24 Dec 2025. 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 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

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 Jun Huang, MD (+8613926451242, huangj97@mail.sysu.edu.cn), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

3 years DFS Rate (time frame: 3 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 24 Dec 2025.

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