Dos Santos Daniela Cristina, Campos Erika Fernandes, Saraiva Câmara Niels Olsen, David Daisa Silva Ribeiro, Malheiros Denise Maria Avancini Costa
Department of Pathology, Botucatu Medical School, State University of São Paulo, São Paulo, Brazil.
Department of Pathology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil.
Transpl Int. 2016 Apr;29(4):443-52. doi: 10.1111/tri.12726. Epub 2015 Dec 22.
Natural killer (NK) cells have been implicated in graft dysfunction. Here, we formulated hypothesis that distinct patterns of expression NK cells markers correlated with acute rejection in kidney transplantation. Therefore, we studied the pattern of NK cell markers CD56, CD57, and CD16 in different compartments of biopsies obtained from recipients diagnosed with acute graft rejection, with or without donor-specific antibodies (DSA). DSA-negative biopsies-from patients with acute T-cell mediated rejection (aTCMR) had an increased expression of CD56+ and CD57+ cells (P = 0.004 and P = 0.001) in the interstitial compartment in comparison with DSA-positive biopsies from patients acute antibody-mediated rejection (aABMR) with (aABMR C4d+) and without C4d deposition (aABMR C4d-). CD16+ cells was increased (P = 0.03) in the glomerular compartment in DSA-positive biopsies. We assume that CD16+ expression and antibody-dependent cellular cytotoxicity (ADCC) in microvascular injury can be associated with aABMR. IFN-γ release from cytoplasmic granules of NK cell could be associated with aTCMR. Our findings suggest that NK cells need to be carefully evaluated because variations in NK cell marker expression might imply the involvement of different immune system pathways in graft rejection.
自然杀伤(NK)细胞与移植物功能障碍有关。在此,我们提出假设,即NK细胞标志物的不同表达模式与肾移植中的急性排斥反应相关。因此,我们研究了从诊断为急性移植物排斥反应的受者获取的活检组织不同区域中NK细胞标志物CD56、CD57和CD16的表达模式,这些受者有或没有供体特异性抗体(DSA)。与来自急性抗体介导排斥反应(aABMR)伴C4d沉积(aABMR C4d +)和不伴C4d沉积(aABMR C4d -)患者的DSA阳性活检组织相比,急性T细胞介导排斥反应(aTCMR)患者的DSA阴性活检组织间质区域中CD56 +和CD57 +细胞表达增加(P = 0.004和P = 0.001)。DSA阳性活检组织肾小球区域中CD16 +细胞增加(P = 0.03)。我们推测微血管损伤中CD16 +表达和抗体依赖性细胞毒性(ADCC)可能与aABMR相关。NK细胞胞质颗粒释放的IFN-γ可能与aTCMR相关。我们的研究结果表明,需要仔细评估NK细胞,因为NK细胞标志物表达的变化可能意味着不同免疫系统途径参与了移植物排斥反应。
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