Electroacupuncture Combined With Paclitaxel Protein-bound and PD-1 Antibody for Second-line Treatment of HER2 Negative, pMMR/MSS Advanced Gastric Cancer

Inclusion Criteria:

Patients must meet the following study enrollment criteria:

Age ≥18 years old and ≤75 years old; Pathology and imaging confirmed advanced gastric cancer with HER2 negative and pMMR/MSS; Progression after first-line chemotherapy with fluorouracil and platinum-based regimens and ±PD-1 monoclonal antibody treatment, second-line treatment is planned; The ECOG score is 0-2; Life expectancy \> 3 months; Willing and able to accept follow-up until death or the end of the study or the termination of the study; The hematological function is normal (platelets \> 80×10\^9/L; White blood cells \> 3×10\^9/L; Neutrophils \> 1.5×10\^9/L; Serum bilirubin ≤1.5 times the upper limit of normal value (ULN), transaminase ≤5 times ULN; There was no ascites, the coagulation function was normal, and the albumin was ≥30g/L; The Child-Push classification of liver function is grade A; Serum creatinine is less than the upper limit of the normal value (ULN), or the calculated creatinine clearance rate is \> 50ml/min (using the Cockcroft-Gault formula) ;

Exclusion Criteria:

Patients meeting any of the following criteria will be excluded from the study:

The primary tumor recurred; Severe arterial embolism or ascites; There is a tendency to bleed or coagulation disorder; Hypertensive crisis or hypertensive encephalopathy; Severe and uncontrollable systemic complications such as infections or diabetes; Clinical severe cardiovascular diseases such as cerebrovascular accident (within 6 months before enrollment), myocardial infarction (within 6 months before enrollment), hypertension that remains uncontrolled after appropriate drug treatment, unstable angina pectoris, congestive heart failure (NYHA grades 2-4), and arrhythmias requiring drug treatment; Have suffered from or whose physical examination shows central nervous system diseases (such as primary brain tumors, epilepsy that cannot be controlled by standard treatment, any history of brain metastases or strokes); Have suffered from other malignant tumors in the past five years (excluding basal cell carcinoma of the skin and/or carcinoma in situ of the cervix after radical resection); Be allergic to any drug in the study; Pregnant and lactating women; There are any other diseases, functional disorders caused by metastatic lesions, or suspected disorders found during physical examinations, suggesting that there may be contraindications to the use of the studied drug or putting the patient at high risk of treatment-related complications; Unable or unwilling to comply with the research protocol;