Phase I Clinical Study to Evaluate SYS6055 Injection in Participants With Relapsed/Refractory B-Cell Malignancies

Exclusion Criteria

• •History of other malignancy within 3 years or concurrent other active malignancy (participants with cured localized tumors such as basal cell carcinoma of the skin, squamous cell carcinoma of the skin, superficial bladder cancer, carcinoma in situ of the prostate, carcinoma in situ of the cervix, carcinoma in situ of the breast, etc., may be enrolled);
• •Participants with bleeding diathesis, active bleeding, hemoptysis, or history of major bleeding within the previous 6 months; tumor invasion of major blood vessels shown by imaging (CT or MRI), or tumor judged by the investigator as highly likely to invade major blood vessels and cause fatal massive bleeding during the subsequent study period;
• •Participants with B-cell malignancies involving the central nervous system;
• •Received autologous hematopoietic stem cell transplantation within 3 months prior to the first dose;
• •Previous allogeneic bone marrow transplantation, gene therapy, or adoptive cell therapy (including CAR-T therapy);
• •Received anti-PD-1, anti-PD-L1, or T-cell engager therapy within 3 months prior to the first dose; received fludarabine or bendamustine within 6 months prior to the first dose;
• •Adverse events from prior antineoplastic therapy have not recovered to CTCAE Version 6.0 grade ≤1 (except for alopecia or other toxicities without safety risk as judged by the investigator);
• •Received major surgery, chemotherapy, radical radiotherapy, antibody-based targeted therapy, imunotherapy, or other antineoplastic therapy within 28 days prior to dosing; or received palliative radiotherapy, chemotherapy, or small-molecule targeted therapy within 14 days prior to dosing; or received antineoplastic herbal preparations or traditional Chinese patent medicines within 14 days prior to dosing;
• •Simultaneously participating in another clinical trial, unless it is an observational (non-interventional) clinical trial or in the follow-up phase of an interventional trial (without impact on the follow-up data of this study);
• •Received live vaccine within 4 weeks prior to dosing;
• •Active bacterial, fungal, or viral infection prior to dosing. Individuals receiving prophylactic antimicrobial therapy without clinical manifestations of active infection prior to dosing may be considered for enrollment;
• •Autoimmune disease requiring systemic therapy;
• •History of central nervous system disease or current persistent central nervous system disease that may interfere with neurological assessments;
• •History of immunodeficiency or positive HIV antibody test during screening;
• •History of tuberculosis treatment within 2 years prior to dosing; history of active syphilis;
• •Active hepatitis B or hepatitis C during screening. Active hepatitis B is defined as HBsAg-positive and HBV DNA above the upper limit of normal (ULN). Active hepatitis C is defined as HCV antibody-positive and HCV RNA \> ULN;
• •History of severe cardiovascular disease;
• •Hypersensitivity or intolerance to the excipients of SYS6055 (mainly human albumin);
• •Any other conditions in participants that may interfere with compliance with study procedures, are not in the best interest of participants, or may affect study results: e.g., history of psychiatric disorders, drug addiction or substance abuse, any other clinically significant diseases or conditions, etc.;
• •Pregnant or lactating female;
• •Any other reason judged by the investigator that the participant is not suitable for participation in this clinical trial.