Up-regulation of NKG2A Inhibitory Receptor on Circulating NK Cells Contributes to Transfusion-induced Immunodepression in Patients with β-thalassemia Major

作     者：邹勇 宋志兴 陆英 梁晓莉 袁青 廖思红 鲍俊杰 

作者机构：Department of Blood Transfusion the Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630 China Department of Clinical Laboratory the Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630 China Reproductive Medicine Unit Department of Obstetrics & Gynecology the First People's Hospital of Foshan Foshan 528000 China Preterm Birth Prevention and Treatment Research Unit Department of Obstetrics Guangzhou Women and Children's Medical Center GuangZhou Medical University Guangzhou 510180 China 

出 版 物：《Journal of Huazhong University of Science and Technology(Medical Sciences)》 (华中科技大学学报（医学英德文版）)

年 卷 期：2016年第36卷第4期

页      面：509-513页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 0710[理学-生物学] 1002[医学-临床医学] 1001[医学-基础医学(可授医学、理学学位)] 1010[医学-医学技术（可授医学、理学学位）] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0836[工学-生物工程] 100215[医学-康复医学与理疗学] 10[医学] 

主　　题：natural killer cells NKG2A thalassemia transfusion immunodepression 

摘      要：Accumulating evidence has shown that allogeneic blood transfusions can induce significant immunosuppression in recipients, and thereby increase the risk of postoperative infection and/or tumor relapse. Although it is well known that natural killer（NK） cells are responsible for the immunodepression effects of transfusion, the underlying mechanisms remain obscure. In this study, we investigated the role of NK cells in transfusion-induced immunodepression in β-thalassemia major. The proportion of circulating NK cells and the expression of NK receptors（NKG2A, CD158 a, NKP30, NKP46 and NKG2D） as well as CD107 a were detected by multicolor flow cytometry. IFN-γ production by circulating NK cells was detected by intracellular cytokine staining. Our results showed that the proportion and cytotoxicity（CD107a expression） of circulating NK cells in transfusion-dependent β-thalassemia major patients were remarkably lower than those of β-thalassemia minor patients or healthy volunteers. Expression of NKG2 A inhibitory receptor on circulating NK cells in patients with β-thalassemia major was remarkably up-regulated, but there were no significant differences in the expression levels of NKP30, NKP46, NKG2 D, CD158 a and IFN-γ. These results indicate NKG2 A inhibitory receptor may play a key role in transfusion-induced immunodepression of NK cells in patients with β-thalassemia major.