HAART治疗后病毒学治疗有效组和失败组患者血浆比较蛋白质组研究

目的 筛选AIDS患者血浆中与HAART疗效相关的特异性生物标志物,为临床疗效评估提供新型检测分子,指导AIDS治疗的预后判断.方法 收集2008年6月至2009年2月由上海市公共卫生临床中心感染一科收集的艾滋病患者血浆,包括病毒学治疗有效组10例(病毒载量＜ 50拷贝/ml)和病毒学治疗失败组11例(病毒载量＞50拷贝/ml),入组患者年龄22 ～ 63岁.血浆样品用Bio-rad公司血浆高丰度蛋白质去除试剂盒处理,去除血浆中的白蛋白和免疫球蛋白IgG.处理后的血浆蛋白质样品通过二维凝胶电泳(2DE)进行分离,采用ImageMaster软件分析获得的电泳图谱,找到与疗效相关的差异蛋白质.差异蛋白质点经过胰酶酶切后,通过在线纳升级反向液相色谱串联电喷雾离子阱质谱分析鉴定.结果 血浆经过高丰度蛋白去除试剂盒处理后,低丰度的蛋白质得到了有效的富集.共发现了6个在治疗有效组和治疗无效组血浆样品中表达差异的蛋白质点.这些差异蛋白质经液相色谱串联质谱分析得到准确鉴定,包括血清转铁蛋白、血清β纤维蛋白原等.结论 通过蛋白质组学研究发现,血清转铁蛋白等蛋白质在艾滋病患者血浆中表达水平与治疗过程中病毒载量相关,它们可能是评价抗病毒治疗疗效的潜在生物标志物.

Proteomic comparison between effective and ineffective etreatment of HAART in viraemia patients

Objective To find specific biomarkers related to HAART treatment in plasma samples of AIDS patients for clinical therapeautic efficacy evaluation and guidance for the prognosis of HIV treatment.Method Plasma samples of AIDS patients were collected from Infectious Disease Department 1 of Shanghai Public Health Clinical Center in June of 2008 to February of 2009,including 11 successfully HAART treated cases (HIV load ＞ 50 copies/ml) and 11 unsuccessfully HAART treated cases (HIV load ＜50 copies/ml).Patients' age ranged from 22 to 63.Plasma samples were treated by Bio-rad AurumTM Serum Protein Mini Kit to remove high abundant proteins:albumin and immunoglobulin were removed.The treated plasma proteins were separated by two-dimensional electrophoresis and analyzed by electrophoretogram using Imagemaster software to find differentially-expressed proteins related to therapeutic efficacy.After digestion by trypsin,the differentially-expressed proteins were identified by online reversed-phase nano-flow liquid chromatography coupled with electrospray ionization ion trap mass spectrometry.Results Low abundant proteins were efficiently enriched after the AurumTM Serum Protein Mini Kit treatment.Six differentially-expressed proteins were detected while comparing successfully and unsuccessfully HAART treated group.These proteins were accurately identified by tandem Mass spectrometry (MS), including serum transferrin, serum β-fibrinogen, etc.Conclusions Our proteomic research revealed that the differentially-expressed proteins such as transferrin,which is related to plasma virus loading in AIDS patients in the process of treatment,might be potential biomarkers evaluating HAART therapeutic efficacy.