共刺激信号动态监测在异体双手移植中的临床意义

背景:异体手移植已经从实验室走向临床。目的:探讨异体双手移植中共刺激信号动态监测的临床意义。设计:病例-对照观察。单位:南方医科大学南方医院创伤骨科。对象:于2001-09/12选取南方医科大学南方医院创伤骨科收治的异体双手移植患者1例,并选择15例健康成人为对照组。方法:患者术前未用免疫抑制剂采血1次;术前使用免疫抑制剂后采血2次;术中接动静脉前各采血1次;术后第1周每日采血1次,第2周隔日采血1次,三,四周每周两次,后每周1次共2个月。其中术后1周为诱导期,余为维持期。对照组健康成人抽取外周静脉血2mL,20g/L乙二胺四乙酸抗凝,应用流式细胞仪动态监测T细胞表面共刺激分子(CD28,CD54,CD11a)变化。主要观察指标:移植前后T淋巴细胞表面共刺激分子的变化。结果:异体双手移植患者的3种共刺激分子(CD28,CD54,CD11a)变化一致,诱导期较术前下降(9.84±5.28)%,(55.50±3.62)%;(71.03±5.33)%,(95.10±1.26)%;(9.40±9.17)%,(29.70±3.23)%],维持期维持于较低水平(22.54±6.56)%,(91.28±8.12)%,(11.22±4.08)%]。结论:动态监测异体肢体移植患者外周血中共刺激信号可以帮助观察肢体移植术后患者的免疫反应强度,对于指导免疫抑制药物的应用以及预测和诊断排斥反应具有重要参考价值。同时,通过处理共刺激信号的方法诱导免疫耐受在异体手移植中具有一定的应用前景。

Clinical significance of serial monitoring of co-stimulating signals in double hand allograft

BACKGROUND: Researches on the hand allograft have been transited from laboratory aspects to clinical application.OBJECTIVE: To evaluate the clinical significance of serial monitoring of co-stimulating signals in double hand transplantation.DESIGN: Case controlled observation.SETTING: Department of Traumatic Orthopaedics, Nanfang Hospital,Southern Medical University.PARTICIPANTS: From September 2001 to December 2001, a patient who was proposed to have double hand transplantation in the Department of Traumatic Orthopaedics, Nanfang Hospital Affiliated to Southern Medical University was taken as the subject of the experiment, meanwhile 15healthy adult man were enrolled as controls.METHODS: Before operation, blood sample was collected from the patient once before given immunodepressant and twice after given immunodepressant; blood sample was also collected before arteriovenous connection during operation, as well as once a day during the first week after operation, once every other day on the second week, twice a week on the third and fourth week, followed by once a week for total two month. The first week after operation was taken as inducing period with the remainder as maintaining period. 2 mL peripheral venous blood was collected from healthy adult and anti-coagulated by EDTA of mass scores of 20 g/L.Flowcytometry was used to carry out a serial monitoring of T cell surface co-stimulating moleculars (CD28, CD54, CD11a).MAIN OUTCOME MEASURES: The change of co-stimulatingmolecules on the surface of T lymphocyte before and after transplantation.RESULTS:The changes of the three co-stimulating molecules were consistent with each other after double hand transplantation (CD28,CD54,CD11a),displaying decrement during inducing period comparing to pre-operation (9.84±5.28)%, (55.50±3.62)%; (71.03±5.33)%, (95.10±1.26)%;(9.40±9.17)%, (29.70±3.23)%] and keeping at lower level at maintaining period (22.54±6.56) %, (91.28±8.12 ) %, ( 11.22±4.08 ) %].CONCLUSION:The serial monitoring of the co-stimulating signals in the peripheral blood of patients with linb allograft is beneficial to the observation of the posopertaive immunologic reaction, providing important guidance for the application of immunosuppression medicine, as well as the prediction and diagnosis of postoperative immune rejection. Meanwhile, costimulating signal induced immunological tolerance is proved promising for the application of hand transplantation.