Identification of high-risk amino-acid substitutions in hematopoietic cell transplantation: a challenging task.

Identification of high-risk amino-acid substitutions in hematopoietic cell transplantation: a challenging task.
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DOI:
10.1038/bmt.2016.142
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发表时间:
2016-10
影响因子:
4.8
通讯作者:
Artz, A.
Artz, A.
中科院分区:
医学3区
文献类型:
--
作者:
Marino, S. R.;Lee, S. M.;Binkowski, T. A.;Wang, T.;Haagenson, M.;Wang, H-L;Maiers, M.;Spellman, S.;van Besien, K.;Lee, S. J.;Karrison, T.;Artz, A.

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异基因造血细胞移植(HCT)为治疗恶性血液病提供了可能。如果没有HLA匹配的供体,可以使用HLA不匹配的无关供体,尽管移植物抗宿主病(GvHD)和治疗相关死亡率(TRM)的风险较高。识别和避免氨基酸取代和位置类型(AASPT)赋予TRM和GvHD的风险更高,可能会提高从单个HLA错配无关供体移植的成功率。使用随机森林和逻辑回归分析,我们确定了19个AASPT与至少一种不良移植结局的更大风险相关:III-IV级急性GvHD,TRM,相对于HLA匹配的无关供体和其他AASPT,无病生存率较低或总生存率较差。然而,当在3,530名患者的独立验证队列中进行测试时,来自训练集的AASPT都没有被验证为高风险。文献综述表明,未能验证原始观察结果是免疫生物学的规则而不是例外,并强调了在临床应用之前进行独立验证的重要性。我们目前的数据不支持对无关供体避免任何特定的I类AASPT。应进行进一步研究,以充分了解AASPT在HCT结局中的作用。
Allogeneic hematopoietic cell transplantation (HCT) offers the potential to cure hematologic malignancies. Absent an HLA matched donor, HLA mismatched unrelated donors may be used although risks of graft-versus-host disease (GvHD) and treatment related mortality (TRM) are higher. Identification and avoidance of amino acid substitutions and position types (AASPT) conferring higher risks of TRM and GvHD would potentially improve the success of transplantation from single HLA mismatched unrelated donors. Using random forest and logistic regression analyses, we identified 19 AASPT associated with greater risks for at least one adverse transplant outcome: grade III-IV acute GvHD, TRM, lower disease free survival or worse overall survival relative to HLA matched unrelated donors and to other AASPT. When tested in an independent validation cohort of 3,530 patients, none of the AASPT from the training set were validated as high-risk, however. Review of the literature shows that failure to validate original observations is the rule and not the exception in immunobiology and emphasizes the importance of independent validation prior to clinical application. Our current data do not support avoiding any specific class I AASPT for unrelated donors. Additional studies should be performed to fully understand the role of AASPT in HCT outcomes.
HlamatchMatchMaker定义的三重匹配匹配与I级HLA等位基因不匹配的造血细胞移植的患者的生存率更好。
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