| Eligibility |
Inclusion Criteria:
- Sign the informed consent form.
- Metastatic or locally advanced colorectal adenocarcinoma unresectable or unfit for
radical radiochemotherapy confirmed by pathology or cytology.
- Microsatellite stable or pMMR patients failed standard treatment, including platinum,
irinotecan, fluorouracil and Bevacizumab (Ras and BRAF wt patients should recived
Cetuximab).
- Patients have at least one lesion could be evaluated by RECIST v1.1 or mRECIST.
- The Eastern Cooperative Oncology Group (ECOG) performance status score was 0 or 1.
- The life expectancy is more than 3 months.
- Good organ function:
Blood routine: hemoglobin =90g/L, white blood cell =3.0×10^9/L, neutrophil =1.5×10^9/L,
platelet =100×10^9/L; Renal function: creatinine=1.5×upper limit of normal (UNL) or
creatinine clearance =60ml/min; Liver function: total bilirubin (TBIL)=1.5×upper limit of
normal (UNL); ALT=2.5×UNL, AST=2.5×UNL, ALT=5×UNL and AST=5×UNL for patients with liver
metastasis.
Exclusion Criteria:
- Have received any anti-PD-1, anti-PD-L1/L2 antibodies, anti-CTLA-4 antibodies and
other immunotherapy in the past.
- Have received any TKI therapy in the past.
- Clinically significant ascites.
- Known to have allergic reactions to any ingredients or excipients of experimental
drugs.
- Have received any antibiotics within 28 days before the first medication or any
probiotics or prebiotics within 14 days before the first medication.
- Radiotherapy, RFA, interventional therapy or surgery were performed within 28 days
before the first medication (except for previous diagnostic biopsy).
- Other active malignant tumors, excluding those who have been disease free for more
than 5 years or in situ cancer considered to have been cured by adequate treatment.
- Brain metastasis or meningeal metastasis has been confirmed. Patients with
neurological symptoms should receive brain CT / MRI examination to exclude metastasis.
- Patients who is suffering from intestinal obstruction, gastrointestinal bleeding,
pulmonary fibrosis or interstitial pneumonia, renal failure, liver failure or
cerebrovascular disease.
- Diabetes was not controlled, defined as HbA1c > 7.5% after anti-diabetic drugs or
hypertension was not controlled, defined as systolic / diastolic blood pressure > 140
/ 90 mmHg after antihypertensive drug.
- Myocardial infarction, severe/unstable angina, New York Heart Association (NYHA) class
III or IV congestive heart failure in the past 12 months.
- Known to be infected with human immunodeficiency virus (HIV), have acquired
immunodeficiency syndrome (AIDS) related diseases, have active hepatitis B or
hepatitis C.
- Suffering from autoimmune diseases or history of organ transplantation requiring
immunosuppressive therapy.
- May increase the risk associated with participation in the study or administration of
the study drug or mental illness that may interfere with the interpretation of
research results.
- Pregnant women (determined by serum human chorionic gonadotropin [hCG]) or lactating
women, or plan to conceive during the treatment period, 2 months after cetuximab
treatment and 6 months after capecitabine treatment. Women of childbearing age with
positive or no pregnancy test at baseline. Women of childbearing age or sexually
active men were not willing to use contraception during the study period, at least 2
months after cetuximab treatment and 6 months after capecitabine treatment.
Postmenopausal women must be amenorrhea for at least 12 months to be considered
infertile.
- There are other serious diseases that the researchers believe patients cannot be
included in the study
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