A common gene signature across multiple studies relate biomarkers and functional regulation in tolerance to renal allograft.

A common gene signature across multiple studies relate biomarkers and functional regulation in tolerance to renal allograft.
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DOI:
10.1038/ki.2014.395
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发表时间:
2015-05
影响因子:
19.6
通讯作者:
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中科院分区:
医学1区
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对肾移植耐受的患者表现出特定的血细胞转录模式,但来自五项不同研究的结果不一致,这提出了与未来临床应用相关的问题。为了解决这个问题,我们试图确定一个共同的基因标记,特定的功能和细胞成分,以及鉴别肾移植后耐受性的生物标志物。一项研究的荟萃分析发现,在96个耐受样本中,存在涉及B细胞和CD4 T细胞增殖以及CD14单核细胞相关功能抑制的强大基因特征。这一特征通过交叉验证方法得到进一步支持,与原产地研究无关,准确率为92.5%。在新的耐受性样品上进行实验验证,并使用前20名生物标志物进行选择,获得了91.7%的良好分类。除了确认b细胞参与外,我们的数据还表明其他细胞亚群参与了耐受性。因此,使用排名前20位的生物标志物(主要集中在B细胞上)可能为监测肾移植受体中耐受或低风险患者的个性化医疗提供一种通用和标准化的工具。这些数据表明,在耐受性患者中,有利于维持体内平衡和“健康”环境的基因在全球范围内得到保存,并可能有助于更好地理解耐受性维持机制。
Patients tolerant to a kidney graft display a specific blood cell transcriptional pattern but results from five different studies were inconsistent, raising the question of relevance for future clinical application. To resolve this, we sought to identify a common gene signature, specific functional and cellular components, and discriminating biomarkers for tolerance following kidney transplantation. A meta-analysis of studies identified a robust gene signature involving proliferation of B and CD4 T cells, and inhibition of CD14 monocyte related functions among 96 tolerant samples. This signature was further supported through a cross-validation approach, yielding 92.5% accuracy independent of the study of origin. Experimental validation, performed on new tolerant samples and using a selection of the top-20 biomarkers, returned 91.7% of good classification. Beyond the confirmation of B-cell involvement, our data also indicated participation of other cell subsets in tolerance. Thus, the use of the top 20 biomarkers, mostly centered on B cells, may provide a common and standardized tool towards personalized medicine for the monitoring of tolerant or low-risk patients among kidney allotransplant recipients. These data point to a global preservation of genes favoring the maintenance of a homeostatic and ‘healthy' environment in tolerant patients and may contribute to a better understanding of tolerance maintenance mechanisms.
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