Clinical trials

This study aims to compare individualized anti-thymocyte globulin (ATG) dosing versus conventional fixed-dose regimens in unrelated donor peripheral blood stem cell transplantation (URD-PBSCT). This study notes that URD-HSCT is a key treatment for malignant hematologic diseases and severe bone marrow failure, with rapid expansion in China. However, this study identifies post-transplant CMV infection as a major challenge, adversely affecting survival and quality of life. This study finds that CMV infection compromises immunity and causes multi-organ complications. Given the high costs, long treatment cycles, and limited efficacy of current interventions, this study considers optimizing CMV prevention to be of greater value than expanding treatment options. This study asserts that effective prevention can reduce infection rates and improve overall survival (OS) and long-term prognosis. This study recognizes that ATG is widely used in URD-HSCT to prevent graft-versus-host disease (GVHD), but its dosage is significantly linked to CMV risk. This study indicates that inadequate ATG exposure increases GVHD risk, while excessive exposure raises viral reactivation (e.g., CMV, EBV) and may cause relapse. This study thus identifies balancing GVHD prevention and infection control as a key clinical goal. This study cites Remberger et al. (2004), who compared ATG doses (4-10 mg/kg) in 162 URD-HSCT patients, finding lower doses increased acute GVHD (aGVHD) and 10 mg/kg raised infection-related mortality, suggesting 6-8 mg/kg as a balanced range. This study also references Bacigalupo et al. (2001), who found no survival differences across doses but noted higher doses reduced severe aGVHD at the cost of increased infection. Therefore, this study concludes that optimal ATG dosing requires balancing GVHD, infection, and relapse. This study acknowledges that ATG pharmacokinetics (PK) are complex, influenced by dose, body weight, and absolute lymphocyte count (ALC). This study points out that even with fixed dosing, internal exposure (active ATG-AUC) varies greatly among individuals, indicating that fixed dosing is suboptimal and individualized strategies are needed. This study notes that Admiraal et al. developed an ALC-based individualized ATG model, improving immune reconstitution, reducing viral infections, and enhancing OS. However, this study observes that this model was designed for non-myeloablative conditioning and is not applicable to myeloablative conditioning (MAC), which is standard in China. To address this, this study states that our team initiated ATG PK studies in 2019. This study explains that under MAC, ALC is nearly eliminated, making traditional models unsuitable. By monitoring active ATG-AUC in 106 haploidentical HSCT (haplo-HSCT) patients and using machine learning, this study identified an optimal exposure window of 100-148.5 UE·day/mL. This study found that patients within this window had lower CMV/EBV reactivation without increased GVHD. This study developed a protocol adjusting doses on days -3 and -2 based on ATG concentrations measured on days -5 and -4. This study confirmed through a prospective single-arm study in haplo-HSCT that this regimen reduces CMV/EBV infection and improves disease-free survival (DFS) and OS while maintaining GVHD control. Given the consistency between URD-PBSCT and haplo-PBSCT in conditioning, GVHD prophylaxis, and CMV prevention-and that CMV infection rates in Chinese URD-PBSCT patients reach 65%-70%-this study extends the individualized ATG protocol to URD-PBSCT to validate its universality across donor sources. In summary, building on prior haploidentical transplant research, this study applies individualized ATG dosing to URD-PBSCT. This study aims to precisely regulate ATG exposure to reduce CMV infection while maintaining GVHD prophylaxis. This study seeks to improve patient survival and outcomes, laying the foundation for a population PK model and advancing HSCT toward precision medicine.

The purpose of this study is to determine the efficacy and safety of combined Ruxolitinib With Corticosteroids as First Line Therapy for the severe acute GVHD (graft-versus-host disease )

B-cell non-Hodgkin lymphoma (B-NHL) is one of the most common malignancies in China, with approximately 100,000 new cases diagnosed annually. Although immunochemotherapy, novel small-molecule targeted agents, and hematopoietic stem cell transplantation have significantly improved outcomes for patients with B-cell malignancies, nearly half of patients still experience drug resistance and relapse. In high-risk aggressive B-cell lymphoma, the 5-year survival rate remains around 50%. Previous clinical guidelines recommended autologous hematopoietic stem cell transplantation as first-line consolidation therapy for high-risk patients; however, multiple studies have demonstrated that even after autologous transplantation, nearly half of these patients relapse and succumb to the disease. Chimeric antigen receptor T (CAR-T) cell therapy has achieved objective response rates of approximately 50% in relapsed/refractory lymphoma, particularly in B-cell subtypes. Nevertheless, limitations such as tumor immune antigen escape, immunosuppressive effects of the tumor microenvironment (TME) on CAR-T cells, and T-cell exhaustion continue to restrict the durability and efficacy of CAR-T-mediated cytotoxicity. This study evaluates the incorporation of chidamide (an HDAC inhibitor) combined with a PD-1 inhibitor as maintenance therapy following CAR-T cell immunotherapy in patients with relapsed/refractory high-risk aggressive B-cell lymphoma. By implementing an "early intervention" strategy-prompt administration of CAR-T cell therapy after induction treatment for relapsed/refractory high-risk aggressive B-cell lymphoma-and subsequent maintenance with chidamide plus a PD-1 inhibitor, the approach aims to reduce relapse rates and improve overall survival. These strategies are intended to address the current unmet clinical need for improved outcomes in relapsed/refractory high-risk aggressive B-cell lymphoma, where prognosis remains poor despite existing therapies.

The purpose of this study is to determine the efficacy and safety of targeted BCMA CART cells secreting PD1 and interleukin 21 fusion protein immunotherapy for first-line consolidation therapy of multiple myeloma with renal dysfunction.

This exploratory clinical study focuses on the use of EBV-AST cell infusion for treating EBV-DNA viremia following allogeneic hematopoietic stem cell transplantation (Allo-HSCT). The study aims to determine the maximum tolerated dose (MTD) or optimal biological dose (OBD) of EBV-AST cells and assess their safety, tolerability, and preliminary efficacy in treating EBV-DNA viremia. The study will involve a 3+3 dose escalation design to evaluate three different dosages of EBV-AST cell infusion. The study is expected to provide important insights into the clinical application of cell-based therapies for EBV infections.

This is an investigator-initiated, open-label, single-arm, dose-escalation exploratory study to evaluate the safety, tolerability, and preliminary efficacy of EBV-AST cell injection in adults with EBV-associated lymphoproliferative disorders, including post-transplant lymphoproliferative disease (PTLD) and EBV-positive lymphomas. Participants will receive EBV-AST cell infusions intravenously every 2 weeks for up to 3 infusions at escalating dose levels. The primary objective is to assess safety and determine a potential optimal biologically active dose. Secondary objectives include preliminary tumor response and EBV-related virologic outcomes, as well as cellular PK/PD.

Epstein-Barr virus (EBV) DNAemia is a common and potentially serious complication after allogeneic hematopoietic stem cell transplantation (allo-HSCT) and may progress to EBV-associated lymphoproliferative disorders. Current treatment options are limited, and effective immune-based therapies are still needed. This is an investigator-initiated, exploratory, open-label, single-arm clinical study designed to evaluate the safety, tolerability, and preliminary efficacy of EBV-specific T cell receptor-engineered T cells (EBV-TCR-T cell injection) in patients with EBV DNAemia after allo-HSCT. Eligible participants will receive intravenous infusions of EBV-TCR-T cells at escalating dose levels. Safety outcomes, EBV-DNA clearance, and preliminary efficacy will be assessed, along with pharmacokinetic and pharmacodynamic characteristics of the infused cells.

The purpose of this study is to determine the efficacy and safety of combined Ruxolitinib With Corticosteroids as First Line Therapy for grade II acute GVHD (graft-versus-host disease )

The purpose of this study is to determine the efficacy and safety of the CAR-T cell immunotherapy utilizing polymer-lipid nanoparticles for delivering CD19/CD20 dual-targeting InViVoCAR1920 mRNA, for the first-line consolidation therapy of relapsed/refractory B-cell lymphoma/leukemia.