B-Cell Prolymphocytic Leukemia

This phase I trial tests the safety, side effects and best infusion dose of genetically engineered cells called anti-CD19/CD20/CD22 chimeric antigen receptor (CAR) T-cells following a short course of chemotherapy with cyclophosphamide and fludarabine in treating patients with lymphoid cancers (malignancies) that have come back (recurrent) or do not respond to treatment (refractory). Lymphoid malignancies eligible for this trial are: non-Hodgkin lymphoma (NHL), acute lymphoblastic leukemia (ALL), chronic lymphocytic leukemia (CLL), and B-prolymphocytic leukemia (B-PLL). T-cells (a type of white blood cell) form part of the body's immune system. CAR-T is a type of cell therapy that is used with gene-based therapies. CAR T-cells are made by taking a patient's own T-cells and genetically modifying them with a virus so that they are recognized by a group of proteins called CD19/CD20/CD22 which are found on the surface of cancer cells. Anti-CD19/CD20/CD22 CAR T-cells can recognize CD19/CD20/CD22, bind to the cancer cells and kill them. Giving combination chemotherapy helps prepare the body before CAR T-cell therapy. Giving CAR-T after cyclophosphamide and fludarabine may kill more tumor cells.

主要研究目的是评价单次、多次不同剂量重组人源化抗 CD52 单克隆抗体注射液在患者体内的安全性及耐受性，并确定剂量限制性毒性（DLT）和最大耐受剂量（MTD）， 为Ⅱ期推荐剂量（RP2D）。次要研究目的是评价单次、多次不同剂量重组人源化抗 CD52 单克隆抗体注射液在患者体内的药代动力学（PK）特征并初步探索疗效。

This phase II trial studies how well letermovir works for the prevention of cytomegalovirus reactivation in patients with hematological malignancies treated with alemtuzumab. Patients receiving treatment with alemtuzumab may experience cytomegalovirus reactivation. Letermovir may block cytomegalovirus replication and prevent infection.