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  • Title: Comparison of anti-thymocyte globulin-based immunosuppressive therapy and allogeneic hematopoietic stem cell transplantation in patients with transfusion-dependent non-severe aplastic anaemia: a retrospective study from a single centre.
    Author: Shen Y, Li Y, Liu Q, Liu W, Yu Q, Hu H, Liu S, Dong J, Xu M, Hong Y, Chen Y, Deng S, Zhuang H, Hu Z, Lin S, Shen Y, Shen J, Zhou Y, Ye B, Wu D.
    Journal: Ann Med; 2023; 55(2):2271475. PubMed ID: 37871262.
    Abstract:
    OBJECTIVES: The selection and timing of anti-thymocyte globulin (ATG)-based immunosuppressive therapy (IST) or allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with transfusion-dependent non-severe aplastic anemia (TD-NSAA) pose significant clinical challenges. This study aims to compare the efficacy and long-term outcomes of the two treatments in TD-NSAA. METHODS: Patients who underwent ATG-based IST or allo-HSCT between July 2011 and December 2019 were reviewed. We gathered their clinical information, treatment response, survival data, and subsequently analysed the associated risk factors. RESULTS: A total of 97 TD-NSAA patients were reviewed, and 55 patients who underwent either ATG-based IST (n = 27) or allo-HSCT (n = 28) were enrolled. We observed a significant disparity in the 12-month overall response rate (ORR) (48.1% in IST vs 78.6% in HSCT, p < 0.05), but not in five-year overall survival (OS) and event-free survival (EFS). Multivariate Cox regression analysis identified the transfusion of ≥78.75 units of red blood cells (RBCs) as the sole independent risk factor for OS (HR: 17.04, p = 0.039) in the IST group. For the HSCT group, disease duration (DD) ≥20 months and transfusion of ≥78.75 units of RBCs predicted an adverse EFS. Frontline IST exhibited superior 12-month ORR (68.8% vs 18.2%, p = 0.018) and five-year EFS when compared to non-frontline. Patients with a DD ranging from 6 to 20 months displayed a better EFS (p = 0.016) in HSCT group than those in the ATG-based IST group. CONCLUSIONS: Prior treatment history, disease duration, and serum ferritin levels should be carefully weighed when making the choice between ATG-based IST and allo-HSCT for TD-NSAA. The selection and timing of anti-thymocyte globulin (ATG)-based immunosuppressive therapy (IST) or allogeneic hematopoietic stem cell transplantation (allo-HSCT) present notable clinical challenges for individuals with transfusion-dependent non-severe aplastic anaemia (TD-NSAA).In terms of treatment outcomes, allo-HSCT exhibited a higher 12-month overall response rate (ORR) in comparison to ATG-based IST among TD-NSAA patients. Nevertheless, comparable rates of 5-year overall survival (OS) and event-free survival (EFS) were observed between the two therapeutic approaches.Several factors warrant consideration when deliberating between ATG-based IST and allo-HSCT for TD-NSAA. These factors include the patient’s prior treatment history, disease duration, number of packed red cell transfusions received, and serum ferritin levels.
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