A Study of PD1 Combined With DC-NK Cell in the Treatment of Solid Tumors

1. Previously receiving ≥ first-line regimen chemotherapy;
2. Age over 3 years old and less than 14 years old;
3. The expected survival period is more than 3 months;
4. ECOG≤2;
5. Vital organ function is satisfied: cardiac ultrasound indicates cardiac ejection fraction ≥ 50%, no obvious abnormality in ECG; blood oxygen saturation ≥ 90%; creatinine clearance calculated by Cockcroft-Gault formula ≥ 40ml/min; ALT and AST ≤ 3 times the normal range, total bilirubin ≤ 2.0 mg / dl;
6. Blood routine: Hgb≥80g/L, ANC≥1×109/L, PLT≥50×109/L; There are measurable target lesions.

Exclusion Criteria:

1. Liver and kidney function:

   • Total bilirubin > 2 x ULN (Gilbert syndrome > 3 x ULN)
   • Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) > 3 × ULN
   • Serum creatinine clearance >60mL/min

2. Serological examination:

   • Absolute neutrophil count (ANC) \<0.75x109/L
   • Platelet count (PLT) \<50x109/L
3. Active hepatitis B (HBV-DNA > 1000 copies / ml), hepatitis C, or uncontrolled infection;
4. The number of days of chemotherapy medication and the administration of hormones below 5mg is ≤3, and the number of days of withdrawal of hormones greater than 5mg is ≤5;
5. Active CNS disease (tumor cells in CSF);
6. Intracranial hypertension or unconsciousness; respiratory failure; diffuse vascular internal coagulation;
7. creatinine > 1.5 times the upper limit of normal or ALT / AST > 3 times the upper limit of normal or bilirubin > 2 times the upper limit of normal;
8. The New York Heart Association (NYHA) is classified as Level III or higher;
9. Uncontrolled diabetes;
10. With other uncontrolled diseases, the investigator believes that it is not suitable for joining;
11. Any situation that the investigator believes may increase the risk of the subject or interfere with the test results.