Induction Chemotherapy Combined With Neoadjuvant Immunotherapy for MSS Colon Cancer: a Prospective Single-center Multi-arm Open-label Randomized Phase II Study
试验速览
- 阶段
- 2 期
- 状态
- 招募中
- 发起方
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- TRG0/1
研究概览
简要总结
This study aims to elucidate the regression effects of neoadjuvant chemotherapy combined with immunotherapy and adjuvant therapy in locally advanced MSS colon cancer.
详细描述
The standard treatment for locally advanced colon cancer is surgery followed by adjuvant chemotherapy containing oxaliplatin. The MOSAIC and 16968 studies have shown that approximately 30% of patients experience recurrence and metastasis within 6-7 years after surgery. Neoadjuvant chemotherapy may improve the prognosis of patients with malignant tumors. The significant tumor shrinkage after neoadjuvant therapy indicates a greater likelihood of long-term survival for patients. The OPTICAL and FoxTROT studies have shown that approximately 35% of patients are resistant to oxaliplatin-containing neoadjuvant chemotherapy, with a pCR rate of less than 10% and uncertain survival improvement. In addition, immunotherapy has poor efficacy for microsatellite stable (MSS) patients. Therefore, it is necessary to explore new and effective neoadjuvant treatment modalities for tumor regression.
The study will screen for individuals who are sensitive to oxaliplatin-containing regimens through induction chemotherapy. Immunogenic cell death will be enhanced by oxaliplatin-induced immunogenicity and combined with anti-programmed cell death ligand 1 (PD-L1) monoclonal antibodies for neoadjuvant therapy. In the context of cancer, the role of the intestinal microbiome in mediating immune activation induced by chemotherapy drugs has been demonstrated. Clostridium butyricum will be introduced as an adjuvant to explore the possibility of further increasing the significant response rate of neoadjuvant therapy.
The study will first conduct 2 cycles of Capox induction chemotherapy to screen for patients sensitive to chemotherapy. Patients will be randomized into three cohorts: one chemotherapy standard control cohort (continuing Capox chemotherapy for 2 cycles) and two enhancement design cohorts (Capox chemotherapy + Anti-PD-L1 monoclonal antibody for 2 cycles/Capox chemotherapy + Anti-PD-L1 monoclonal antibody + Clostridium butyricum for 2 cycles), followed by CME surgery. The study's primary endpoint is the proportion of Tumor regression grade(TRG)0/1 in the pathological specimens of surgically resected tumors.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age ≥18 years old and ≤75 years old.
- •Pathologically diagnosed MSS or pMMR-type colon adenocarcinoma.
- •The lower edge of the tumor is more than 12cm from the anus as measured by colonoscopy and the lower edge of the tumor cannot be directly palpated during rectal examination.
- •Enhanced CT stage T3/4 or T1-4N+ without multiple primary tumors or distant metastasis.
- •Life expectancy is expected to be more than 1 year.
- •First diagnosis, no previous anti-tumor treatment received, and no chemotherapy contraindications.
- •Informed consent, able to understand the study protocol and willing to participate in the study, and will provide written informed consent.
排除标准
- •Refused to participate in this study.
- •Multifocal colorectal cancer.
- •History of malignant tumors, except for basal cell carcinoma, papillary thyroid carcinoma, and various in situ cancers.
- •Cannot tolerate chemotherapy, such as but not limited to bone marrow suppression.
- •Acute exacerbation of important organ diseases (such as but not limited to COPD, coronary heart disease, and renal insufficiency) and/or severe acute infectious diseases (such as but not limited to hepatitis, pneumonia, and myocarditis), ASA score > 3 points.
- •Mental disorders, illiteracy, or language communication barriers that prevent the understanding of the study protocol.
- •Tumor obstruction or high risk of obstruction, bleeding, and/or perforation.
- •Peripheral sensory neuropathy, unable to receive oxaliplatin-based chemotherapy.
- •Pregnancy or lactation.
- •Unable to undergo enhanced CT examination or having comorbidities requiring the use of glucocorticoid therapy.
- •Continuous use of glucocorticoids for more than 3 days within 1 month prior to signing the informed consent form.
- •CT or MRI in the mid-sagittal plane shows that the lower border of the tumor is below the line connecting the sacrococcygeal promontory and the upper border of the pubic symphysis.
- •Other situations in which the researcher deems unsuitable for this study.
研究组 & 干预措施
Standard chemotherapy control cohort
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Standard chemotherapy control cohort and continued with two more cycles of Capox chemotherapy. Then, these patients will receive curative surgery for colon cancer.
干预措施: Oxaliplatin (Drug)
Standard chemotherapy control cohort
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Standard chemotherapy control cohort and continued with two more cycles of Capox chemotherapy. Then, these patients will receive curative surgery for colon cancer.
干预措施: Capecitabine (Drug)
Standard chemotherapy control cohort
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Standard chemotherapy control cohort and continued with two more cycles of Capox chemotherapy. Then, these patients will receive curative surgery for colon cancer.
干预措施: Colectomy (Procedure)
Enhancement regimen of combined Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody. Then, these patients will receive curative surgery for colon cancer.
干预措施: Oxaliplatin (Drug)
Enhancement regimen of combined Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody. Then, these patients will receive curative surgery for colon cancer.
干预措施: Capecitabine (Drug)
Enhancement regimen of combined Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody. Then, these patients will receive curative surgery for colon cancer.
干预措施: Anti-PD-L1 Monoclonal Antibody (Drug)
Enhancement regimen of combined Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody. Then, these patients will receive curative surgery for colon cancer.
干预措施: Colectomy (Procedure)
Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody and Clostridium butyricum. Then, these patients will receive curative surgery for colon cancer.
干预措施: Oxaliplatin (Drug)
Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody and Clostridium butyricum. Then, these patients will receive curative surgery for colon cancer.
干预措施: Capecitabine (Drug)
Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody and Clostridium butyricum. Then, these patients will receive curative surgery for colon cancer.
干预措施: Anti-PD-L1 Monoclonal Antibody (Drug)
Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody and Clostridium butyricum. Then, these patients will receive curative surgery for colon cancer.
干预措施: Clostridium butyricum (Drug)
Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody
Patients with locally advanced colon cancer who met the inclusion criteria received two cycles of Capecitabine and Oxaliplatin （Capox） regimen chemotherapy and were evaluated by enhanced CT. Patients with more than 20% regression of maximum diameter of colon tumor in enhanced CT image will be randomly assigned to the Enhancement regimen of combined lactobacillus and Anti-PD-L1 monoclonal antibody and continued with two more cycles of Capox chemotherapy along with the reduced dosage of Anti-PD-L1 monoclonal antibody and Clostridium butyricum. Then, these patients will receive curative surgery for colon cancer.
干预措施: Colectomy (Procedure)
结局指标
主要结局
TRG0/1
时间窗: 1 day of postoperative pathological examination.
The sum of tumor regression grades TRG0(disappearance of tumor) and TRG1(scattered residual tumor)(AJCC standard).
次要结局
- AE(Adverse events (NCI CTC AE 5.0) that occurred from the first day of induction chemotherapy to one day before the surgery date(up to half a year).)
- Surgical Complication(From the day of surgery to 30 days after the operation, including intraoperative and postoperative complications.)
- DFS(From date of the patient signs the informed consent form until the date of earliest occurrence of the patient's tumor recurrence or death，whichever came first, assessed up to 36 months.)
- OS(From the date of the patient signs the informed consent form until the date of the patient's death, assessed up to 60 months.)
- Concentration of FLT3L(blood tests for FLT3LG at initial diagnosis, after induction chemotherapy, before and 3 months after surgery.)
- Concentration of cytokines(Blood tests of cytokines such as IFN-γ are conducted using techniques such as immunofluorescence and ELISA at initial diagnosis, after induction chemotherapy, before and 3 months after surgery.)
- T lymphocyte(The types and counts of T cells are analyzed using flow cytometry at initial diagnosis, after induction chemotherapy, before surgery, and 3 months after surgery.)
- Molecular pathological analysis of tumor tissue.(Nanostring and Whole exome gene sequencing is performed on tumor specimens to analyze the changes in immune cell types, counts, and other immune status-related factors in the tumor microenvironment before and after treatment (up to half a year).)
- Minimal Residual Disease (MRD)(Collect plasma after surgery for MRD detection (up to half a year).)