The purpose of this study is to evaluate the safety and efficacy of BiRd regimen combined with BCMA CAR T cell therapy in newly diagnosed multiple myeloma patients

This is a phase 3, single arm, multi-center study. The patients will receive BiRd regimen (clarithromycin,lenalidomide, dexamethasone) combined with infusion of autologous BCMA-directed CAR T-cells in newly diagnosed MM patients. The study participation will be 4 years including treatment and follow-up periods.

Inclusion Criteria:

1. Newly diagnosed MM according to the criteria by International Myeloma Working Group (IMWG)
2. Age 18-75
3. Eastern Cooperative Oncology Group (ECOG) score 0-2
4. BCMA positive as detected with flowcytometry or ELISA.
5. Patients with left ventricular ejection fraction ≥ 0.5 by echocardiography or grade I/II cardiovascular dysfunction according to the New York Heart Association Classification.
6. Patients with aspartate aminotransferase or glutamic-pyruvic transaminase > 3x upper limit of normal or bilirubin > 2.0 mg/dL

Exclusion Criteria:

1. Patients are pregnant or lactating.
2. Nonsecretory MM.
3. History of previous treatment of MM.
4. Patients with uncontrolled active infection.
5. Patients with active hepatitis B or hepatitis C infection.
6. Patients with HIV infection.
7. Patients with atrial or venous thrombosis or embolism.
8. Patients with myo-infarction or severe arrythmia in the recent 6 months.
9. Other comorbidities that investigators considered not suitable for this study.