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Higher Total Body Irradiation Dose Intensity in Fludarabine/TBI-Based Reduced-Intensity Conditioning Regimen Is Associated with Inferior Survival in Non-Hodgkin Lymphoma Patients Undergoing Allogeneic Transplantation.
Biology of Blood and Marrow Transplantation ( IF 5.609 ) Pub Date : 2020-03-09 , DOI: 10.1016/j.bbmt.2020.02.025
Mehdi Hamadani 1 , Manoj Khanal 2 , Kwang W Ahn 2 , Carlos Litovich 3 , Victor A Chow 4 , Alireza Eghtedar 5 , Reem Karmali 6 , Allison Winter 7 , Timothy S Fenske 8 , Craig Sauter 9 , Mohamed A Kharfan-Dabaja 10 , Farrukh T Awan 11
Affiliation  

Disease relapse is the most common cause of therapy failure in patients with non-Hodgkin lymphoma (NHL) undergoing reduced-intensity conditioning (RIC) allogeneic hematopoietic cell transplantation (allo-HCT). It is not known whether or not increasing total body irradiation (TBI) dose from 2 to 4 Gy in a RIC platform can provide improved disease control without increasing nonrelapse mortality (NRM). Using the Center for International Blood & Marrow Transplant Research (CIBMTR) database, we evaluated the outcomes of patients with NHL receiving RIC allo-HCT with either fludarabine (Flu)/2-Gy TBI versus Flu/4-Gy TBI. In the CIBMTR registry, 413 adult patients with NHL underwent a first allo-HCT using either a matched related or unrelated donor between 2008 and 2017, using a RIC regimen with either Flu/2-Gy TBI (n = 349) or Flu/4-Gy TBI (n = 64). The primary endpoint was overall survival (OS). Secondary endpoints included acute (a) and chronic (c) graft-versus-host disease (GVHD), NRM, relapse/progression, and progression-free survival (PFS). At baseline, the Flu/2-Gy TBI cohort had significantly fewer patients with Karnofsky performance status ≥90 and significantly more patients had a higher HCT-comorbidity index. On multivariate analysis, the 2 conditioning cohorts were not significantly different in terms of risk of grade 3 to 4 aGVHD or cGVHD. Compared to Flu/2-Gy TBI, the Flu/4-Gy TBI conditioning was associated with a significantly higher risk of NRM (hazard ratio [HR], 1.79; 95% confidence interval [CI], 1.11 to 2.89; P = .02) and inferior OS (HR, 1.51; 95% CI, 1.03 to 2.23, P = .03). No significant differences were seen in the risk of relapse/progression (HR, 0.78; 95% CI, 0.47 to 1.29, P = .33) or PFS (HR, 1.09; 95% CI, 0.78 to 1.54, P = .61) between the 2 regimens. Comparing Flu/2-Gy TBI versus Flu/4-Gy TBI cohorts, the 5-year adjusted outcomes were NRM (28% versus 47%; P = .005), relapse/progression (35% versus 29%; P = .28), PFS (37% versus 24%; P = .03), and OS (51% versus 31%; P = .001), respectively. Relapse was the most common cause of death in both cohorts. In patients with NHL undergoing Flu/TB I-based conditioning, augmenting TBI dose from 2 to 4 Gy is associated with higher NRM and inferior OS, without any significant benefit in terms of disease control. The optimal dose is 2-Gy in the RIC Flu/TBI platform for lymphomas.

中文翻译:

在接受异基因移植的非霍奇金淋巴瘤患者中,基于氟达拉滨/TBI 的低强度调理方案中较高的全身照射剂量强度与较差的存活率相关。

疾病复发是非霍奇金淋巴瘤 (NHL) 患者接受低强度调理 (RIC) 异基因造血细胞移植 (allo-HCT) 治疗失败的最常见原因。目前尚不清楚在 RIC 平台中将全身照射 (TBI) 剂量从 2 Gy 增加到 4 Gy 是否可以在不增加非复发死亡率 (NRM) 的情况下提供更好的疾病控制。使用国际血液和骨髓移植研究中心 (CIBMTR) 数据库,我们评估了 NHL 患者接受 RIC allo-HCT 与氟达拉滨 (Flu)/2-Gy TBI 与 Flu/4-Gy TBI 的结果。在 CIBMTR 注册中,413 名成年 NHL 患者在 2008 年至 2017 年期间使用匹配的相关或无关供体接受了第一次 allo-HCT,使用 RIC 方案与 Flu/2-Gy TBI(n = 349)或 Flu/4 -Gy TBI (n = 64)。主要终点是总生存期(OS)。次要终点包括急性(a)和慢性(c)移植物抗宿主病(GVHD)、NRM、复发/进展和无进展生存期(PFS)。在基线时,Flu/2-Gy TBI 队列中 Karnofsky 体能状态≥90 的患者显着减少,而 HCT 合并症指数较高的患者显着更多。在多变量分析中,2 个调理队列在 3 至 4 级 aGVHD 或 cGVHD 的风险方面没有显着差异。与流感/2-Gy TBI 相比,Flu/4-Gy TBI 调理与显着更高的 NRM 风险相关(风险比 [HR],1.79;95% 置信区间 [CI],1.11 至 2.89;P = . 02) 和较差的 OS(HR,1.51;95% CI,1.03 至 2.23,P = .03)。复发/进展风险无显着差异(HR,0.78;95% CI,0. 47 至 1.29,P = .33)或 PFS(HR,1.09;95% CI,0.78 至 1.54,P = 0.61)。比较流感/2-Gy TBI 与流感/4-Gy TBI 队列,5 年调整结果为 NRM(28% 对 47%;P = .005)、复发/进展(35% 对 29%;P = . 28)、PFS(37% 对 24%;P = .03)和 OS(51% 对 31%;P = .001)。复发是两个队列中最常见的死亡原因。在接受基于流感/TB I 调理的 NHL 患者中,将 TBI 剂量从 2 Gy 增加到 4 Gy 与更高的 NRM 和较差的 OS 相关,但在疾病控制方面没有任何显着益处。用于淋巴瘤的 RIC Flu/TBI 平台的最佳剂量为 2-Gy。5 年调整结果为 NRM(28% 对 47%;P = .005)、复发/进展(35% 对 29%;P = .28)、PFS(37% 对 24%;P = .03)和 OS(分别为 51% 与 31%;P = .001)。复发是两个队列中最常见的死亡原因。在接受基于流感/TB I 调理的 NHL 患者中,将 TBI 剂量从 2 Gy 增加到 4 Gy 与更高的 NRM 和较差的 OS 相关,但在疾病控制方面没有任何显着益处。用于淋巴瘤的 RIC Flu/TBI 平台的最佳剂量为 2-Gy。5 年调整结果为 NRM(28% 对 47%;P = .005)、复发/进展(35% 对 29%;P = .28)、PFS(37% 对 24%;P = .03)和 OS(分别为 51% 与 31%;P = .001)。复发是两个队列中最常见的死亡原因。在接受基于流感/TB I 调理的 NHL 患者中,将 TBI 剂量从 2 Gy 增加到 4 Gy 与更高的 NRM 和较差的 OS 相关,但在疾病控制方面没有任何显着益处。用于淋巴瘤的 RIC Flu/TBI 平台的最佳剂量为 2-Gy。将 TBI 剂量从 2 Gy 增加到 4 Gy 与更高的 NRM 和较差的 OS 相关,但在疾病控制方面没有任何显着益处。用于淋巴瘤的 RIC Flu/TBI 平台的最佳剂量为 2-Gy。将 TBI 剂量从 2 Gy 增加到 4 Gy 与更高的 NRM 和较差的 OS 相关,但在疾病控制方面没有任何显着益处。用于淋巴瘤的 RIC Flu/TBI 平台的最佳剂量为 2-Gy。
更新日期:2020-03-09
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