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20 January 2018 : Laboratory Research  

Role of B and T Lymphocyte Attenuator in Renal Transplant Recipients with Biopsy-Proven Acute Rejection

Zijie Wang1BCDE, Haiwei Yang1BC, Xuzhong Liu2CDE, Jingying Zhang3CD, Zhijian Han1BC, Jun Tao1ABD, Chunchun Zhao1BC, Xiaobin Ju1DEF, Ruoyun Tan1EFG, Min Gu1EFG*

DOI: 10.12659/MSM.905752

Med Sci Monit 2018; 24: LBR387-396

Abstract

BACKGROUND: Acute rejection is a common predisposing cause of allograft dysfunction in kidney transplantation. Recently, the B and T lymphocyte attenuator (BTLA)/herpes virus entry mediator (HVEM)/lymphotoxin (LIGHT)/CD160 pathway was found to be potentially involved in the regulation of T cell activation. This could mean that this pathway is involved in graft rejection in kidney transplantation; the present study aimed to explore this possibility.

MATERIAL AND METHODS: The expression of BTLA, HVEM, LIGHT and CD160 on peripheral CD4+, CD8+ and CD19+ lymphocytes were analyzed by flow cytometry in recipients with biopsy-proven acute rejection (BPAR) or stable allograft function, as well as in healthy volunteers. Moreover, we performed HE staining and immunohistochemical staining to assess the expression of BTLA and HVEM in kidney samples from recipients with BPAR and patients who underwent the surgery of radical nephrectomy.

RESULTS: We observed the significantly lower expression of BTLA on CD4+ T cells in recipients from the BPAR group than in recipients from the stable group. The expression of BTLA on CD8+ T cells among recipients both from the BPAR and stable group was statistically increased than that in the healthy volunteers. A significant difference in the expression of CD160 in the stable group was found when compared with the BPAR group or control group. Moreover, there was no significance in the expression of HVEM, LIGHT or CD160 on other subtypes of T cells between the 3 groups or in the expression of BTLA on CD4+ T cells between the BPAR and control group.

CONCLUSIONS: The findings indicate that the BTLA/HVEM pathway does be involved in pathogenesis of acute rejection following kidney transplantation, as well as the induction of transplant tolerance. This pathway may therefore be a useful target for therapy against acute rejection after kidney transplantation.

Keywords: Antigens, CD4, Kidney Transplantation, Rejection (Psychology)

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750