A primary study on the level of human cytomegalovirus specmc CD8+ T lymphocytes and IFN-γ secretion effect in kidney transplant recipients
- VernacularTitle:肾移植患者外周血人巨细胞病毒特异性CD8+T淋巴细胞频率及其γ干扰素分泌功能的初步研究
- Author:
Ruifeng YANG
;
Guobin XU
;
Xu WU
;
Zhiyan LI
;
Tiean XIA
- Publication Type:Journal Article
- Keywords:
Kidney transplantation;
Cytomegalovirus;
CD8-positive T-lymphocytes;
T-lymphocytes,cytotoxic;
Interferon type Ⅱ
- From:
Chinese Journal of Laboratory Medicine
2008;31(9):1016-1020
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the level of human cytomegalovirus(HCMV)specific CD8+ T lymphoeytes in peripheral blood and the immune reaponae of HCMV reactivation after kidney transplantation.Methods Thirty-eight HCMV seropesitive HLA-A*0201 kidney transplant recipients(9 with HCMV infection and 29 without HCMV infection)and 54 healthy individuals were enrolled.The levels of total HCMV specific CD8+ T cells were measured using HLA-A2 pentamer folded with HCMV-peptide NLVPMVATV.The levels of IFN-γ secreting CD8+ T cells were measured by intracelluhr IEN-γ staining pulsed with the same peptide.Results The median levels of pentamer stained CD8+ T cells were 1.19%(0-19.42%),1.20%(0-18.40%)and 3.2%(0.51%-18.90%)in healthy group,negative HCMV group and positive HCMV group(H=5.34,P＞0.05),respectively.The median levels of IFN-γ secreting CD8+ T cells were 0.72%(0-0.70%),0.47%(0-5.61%)and 0.67%(0.07%-4.00%),respectively(H=0.58,P＞0.05).However,the mean proportions of IFN-γ secreting pentamer stained T cells relative to total HCMV specifc CIL were(60.18±19.16)%,(39.19±17.22)% and(20.02±13.26)%,respectively.There were significant differences among the groups(P＜0.01).Condusiorm There was no significant difference of levels of HCMV specific CD8+ T lymphocytes in peripheral blood between the kidney transplant recipients and healthy individuals.However,the proportion of HCMV-specific IFN-γ producing CD8+ T cells in pentamer stained cells was reduced in the kidney transplant recipients especially in those with active HCMV infection,which may contribute to the inability to control HCMV reactivation.
