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Rituximab, methotrexate (MTX), procarbazine, vincristine and lenalidomide (RL-MPV). The peripheral blood stem cell (PBSC) harvest procedure will be performed after 2nd cycle of RL-MPV. High dose chemotherapy Busulfan, Thiotepa, and Cyclophosphamide. 3 months after auto-HSCT, maintenance therapy with nivolumab 3 mg/kg is started for 6 months every 2 weeks

The initial treatment will consist of cycles of 14 days. Each cycle will start with rituximab, which will be given by vein on day 1. On day 2 you will receive: Methotrexate will be given by vein over 2 to 3 hours and vincristine will be given as a single injection over a few minutes. Procarbazine and Lenalidomide are a pill that you will take at bedtime for 7 nights starting on day 2. Procarbazine and Lenalidomide are only given every other cycle. During each cycle, you will be in the hospital. After the second cycle of chemotherapy, PBPCs will be collected. You will be hospitalized again for high-dose chemotherapy and receive supportive medications to help avoid complications, including antibiotics and blood transfusions. Busulfan, carmustine and cyclophosphamide will be given to you for 5 days. After break of 1 day, we will return your PBPC (or bone marrow) to you through a vein. You will be in the hospital for at least 3 weeks.

Rituximab, Methotrexate, Vincristine, Procarbazine, Lenalidomide

Eugene Zvonkov, Phd, MD

Daria Koroleva, Phd

Eugene Zvonkov, PhD/MD

Daria Koroleva, PhD

The purpose of this study is to determine the efficacy and safety of the new treatment proposed in this study. Conducting a prospective study "CNS-2015" in patients with PDLBCL CNS made it possible to achieve 2-year EFS, DFS and OS of 83%, 83% and 88%, respectively. The presence of early relapses of the disease has now led to the need to find an alternative program for patients with PDLBCL CNS. In the new "CNS-2021" protocol, lenalidomide was included in the R-MPV program in order to intensify the induction stage. In the conditioning regimen, thiotepa was replaced by carmustine, due to its significant CNS bioavailability. In order to possibly prevent early relapses, an anti-PD-1 inhibitor (nivolumab) was used as maintenance therapy.

Patients will receive 4 cycles of RL-MPV (rituximab, methotrexate (MTX), procarbazine, vincristine, and lenalidomide (RL-MPV) as induction. The conditioning regimen prior to autologous blood stem cell transplantation includes high doses busulfan, thiotepa, and cyclophosphamide. After 3 months after autologous blood stem cell transplantation, maintenance therapy with nivolumab 3 mg/kg every 2 weeks for 6 months will be started.Patients will be out of the study at the time of death. All patients believe in the possibility of survival within 3 months throughout their lives. Survival status can be obtained by phone call, storage visit, or medical records (eg doctor's note/lab results from a clinic or storage visit).

RL-MPV Followed by BBC HCT Using Autologous Stem Cells and Maintenance Therapy With Nivolumab for Newly Diagnosed PCNSL

Rituximab, Methotrexate, Procarbazine, Vincristine, Lenalidomide (RL-MPV) Followed by BBC (BCNU, Busulfan, Cyclophosphamide) High-dose Chemotherapy With Auto-HCT and Maintenance Therapy With Nivolumab in Newly Diagnosed Primary CNS Lymphoma

to evaluate the frequency of adverse events (safety and efficacy) of the use of RL-MPV followed by high-dose chemotherapy using carmustine, cyclophosphamide and busulfan with stem cell rescue in patients with newly diagnosed PCSNL.

to evaluate response rates with the combination of lenalidomide and R-MPV as induction chemotherapy.

National Research Center for Hematology, Russia

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
RL-MPV Followed by BBC HCT Using Autologous Stem Cells and Maintenance Therapy With Nivolumab for Newly Diagnosed PCNSL	NCT05425654	Primary CNS Lym...	Rituximab, Meth...	18 Years - 70 Years	National Research Center for Hematology, Russia
RL-MPV Followed by BBC HCT Using Autologous Stem Cells and Maintenance Therapy With Nivolumab for Newly Diagnosed PCNSL	NCT05425654	Primary CNS Lym...	Rituximab, Meth...	18 Years - 70 Years	National Research Center for Hematology, Russia

Spots Global Cancer Trial Database for rituximab, methotrexate, vincristine, procarbazine, lenalidomide