Sequential CAR-T Cells Therapy for CD5/CD7 Positive T-cell Acute Lymphoblastic Leukemia and Lymphoblastic Lymphoma Using CD5/CD7-Specific CAR-T Cells

Inclusion Criteria:

* Signed written informed consent; Patients volunteer to participate in the clinical trial;
* Diagnosis is mainly based on the World Health Organization (WHO) 2008;
* Complete remission cannot be achieved after induction therapy; recurrence occurs after completion remission; the burden of leukemic blasts in the peripheral blood or bone marrow is greater than 5%;
* Leukemic blast cells express CD7/CD5 (CD7 OR CD5 positive by flow cytometry or immunohistochemistry ≥70%);
* The expected survival period is greater than 12 weeks;
* ECOG score ≤2;
* Age 2-60 years old;
* HGB≥70g/L (can be transfused);
* Total bilirubin does not exceed 3 times the upper limit of normal value, and AST and ALT do not exceed 5 times the upper limit of normal value.

Exclusion Criteria:

* Patients declining to consent for treatment
* Prior solid organ transplantation
* One of the following cardiac issues: atrial fibrillation; myocardial infarction within the past 12 months; prolonged QT syndrome or secondary QT prolongation; clinically significant pericardial effusion; cardiac insufficiency NYHA (New York Heart Association) III or IV;
* History of severe pulmonary dysfunction diseases;
* Severe infection or persistent infection cannot be effectively controlled;
* Severe autoimmune disease or congenital immunodeficiency;
* Active hepatitis;
* Human immunodeficiency virus (HIV) infection;
* Clinically significant viral infections, or uncontrollable viral reactivation, including EBV (Epstein-Barr virus).