Clinical Study of EBV-TCR-T Cells for EBV-associated Hemophagocytic Lymphohistiocytosis or EBV Infection

Epstein-Barr virus (EBV) is a widely disseminated herpesvirus that is spread by intimate contact between susceptible persons and asymptomatic EBV shedders. The inability to control EBV infection can lead to some patients developing EBV-positive B-cell lymphomas, chronic active EBV infections, and hemophagocytic lymphohistiocytosis (HLH). In this prospective study, HLA-A*02:01/11:01/24:02-restricted EBV-specific T cell receptor (TCR) will be introduced into the T cells of donors by ex vivo lentiviral transduction to generate EBV-TCR-T cells. An escalated dose ranging from 1×10^6/kg to 1×10^8/kg of EBV-TCR-T cells will be infused into patients with EBV-HLH or EBV infection. The safety, efficacy, pharmacokinetics and cytokine levels of allogenic EBV-TCR-T cell therapy will be evaluated.

Inclusion criteria

• Age 1-60 years, gender unlimited.
• Diagnosed with EBV associated-hemophagocytic lymphohistiocytosis (HLH) or EBV infection.
• Fully understood and informed the study and signed the ICF.
• Karnofsky Score ≥ 70(age ≥16y) or Lansky Score ≥ 50(age<16y).
• TCRT-T cell donor inclusion criteria: 1)Age >=8 years, gender unlimited; 2) Understand and voluntarily sign informed consent and are willing to comply with laboratory tests and other research procedures; 3) ≥ 3/6 HLA match with TCR-T cell recipients enrolled; 4) Lymphocyte count = (0.8~4) × 10^9/L; 5) Have sufficient venous circulation, without any symptoms that do not allow blood cell isolation.

Exclusion criteria

• Patients with uncontrolled active aGVHD one day before TCR-T cell infusion.
• Patients with severe kidney disease (Cr > 3×normal value), liver damage (TBIL >2.5×upper limit of normal value, ALT and AST > 3×upper limit of normal value) or heart failure (NYHA heart function grade IV or left ventricular ejection fraction<50%) one week before TCR-T cell infusion.
• Anticipated to take immunosuppressive hormones on the day of TCR-T cell infusion.
• Use of immunosuppressive drugs or G-CSF within 2 weeks before PBMC blood collection.
• Have tumours, active and uncontrolled malignant diseases.
• Serologically positive for HIV-Ab or TAP-ab.
• Pregnant or lactating women.
• Men and their partners or women of childbearing potential refused contraception during the study period.
• Anticipated to have other cell therapies in 4 week post TCR-T cell infusion.
• Participated in any other clinical study of drugs and medical devices before 4 weeks of enrollment.
• Allergy to albumin.
• TCRT-T cell donor exclusion criteria: 1) pregnant woman; 2) Serologically positive for HBsAg, HCV-Ab, HIV-Ab or TAP-ab; 3) EBV-DNA or CMV-DNA positive; 4) other uncontrolled infection; 5) Use of immunosuppressive drugs or G-CSF within 2 weeks before PBMC blood collection.