XLCART001 Treatment in Relapsed/Refractory/High-risk B-cell Malignancy Subjects

Inclusion Criteria:

* Age ≥18 years, male and female,
* Confirmed as CD19-positive B cell lymphoma/leukemia by immunohistochemistry or flow cytometry
* No effective treatment
* Patients must have a measurable or evaluable disease at the time of enrollment.
* Adequate organ system function including:

  * ALT/AST \< 3 upper limit of normal; Total Bilirubin \< 2.5 upper limit of normal
  * Creatinine \< 2 upper limit of normal
  * Oxygen saturation ≥ 95%
  * Left ventricular ejection fraction ≥ 40%
  * Number of neutrophil ≥ 0.75×10\^9/L, number of platelet ≥ 50×10\^9/L
* At least 4 weeks from receiving previous treatment (radiotherapy, chemotherapy, monoclonal antibody therapy or other treatments)
* No contraindications of peripheral blood apheresis
* Female subjects in childbearing age, their serum or urine pregnancy test must be negative. All patients must agree to take effective contraceptive measures during the trial measures
* ECOG score 0-2, expected survival ≥ 12 weeks

Exclusion Criteria:

* Women who are pregnant or lactating. Patients have breeding intent in 12 months or cannot take effective contraceptive measures during the trial measures
* Uncontrollable active infection within four week. Prophylactic antibiotic, antiviral and antifungal treatment is permissible. Active hepatitis B or hepatitis C virus infection, as well as acquired, congenital immune deficiency diseases, including but not limited to HIV-infected persons
* Subjects with any autoimmune disease or any immune deficiency disease
* Have a history of allergy to antibodies or cellular products
* Participated in any other clinical trial within four weeks
* Used of systemic steroids within four weeks (using inhaled steroids or ≤ 20mg/d prednison are exceptions)
* Have mental diseases
* Have history of drug addiction
* The investigators believe that any increase in the risk of the subject or interference with the results of the trial