With gene engineering EB virus membrane antigen as the diagnostic antigen, indirect immunofluo-rescence (IF) assay was used to detect IgA antibody against EB virus membrane antigen (MA-IgA) in sera from 202 nasopharyn...With gene engineering EB virus membrane antigen as the diagnostic antigen, indirect immunofluo-rescence (IF) assay was used to detect IgA antibody against EB virus membrane antigen (MA-IgA) in sera from 202 nasopharyngeal carcinoma (NPC) patients and 315 controls (normal and patients with other tumors). MA-IgA antibody was positive in 96.8% of the pretreatment NPC patients with a GMT of 1:36.3. MA-IgA detection by this method was more sensitive than EA-IgA detection by IE. In contrast, patients with tumors other than NPC were negative for MA-IgA antibody. 9.1% of VCA-IgA positive persons were MA-IgA positive with a GMT of less than 1:5. No MA-IgA positive was found in VCA-IgA negatives. The results indicated that this method was relatively specific. In the treatment group, the positive rate and GMT of MA-IgA antibody declined with increase in survival time and the decline was faster than VCA-IgA. When recurrence or distant metastasis developed, similar to VCA-IgA and EA-IgA antibodies, the positive rate and GMT of MA-IgA antibody increased to its pretreatment level. Therefore, MA-IgA detection might be valuable in the early diagnosis and monitor of NPC.展开更多
背景与目的:Epstein-Barr病毒VCA/IgA抗体(serum immunoglobulin A against Epstein-Barrvirus capsid antigen,EBV-VCA/IgA)是目前应用最广泛的鼻咽癌诊断指标之一,但它对鼻咽癌预后判断的意义尚不明确。本研究探讨VCA/IgA抗体水平与...背景与目的:Epstein-Barr病毒VCA/IgA抗体(serum immunoglobulin A against Epstein-Barrvirus capsid antigen,EBV-VCA/IgA)是目前应用最广泛的鼻咽癌诊断指标之一,但它对鼻咽癌预后判断的意义尚不明确。本研究探讨VCA/IgA抗体水平与鼻咽癌患者长期生存的关系,为确立VCA/IgA能否作为鼻咽癌独立的预后指标提供依据。方法:根据广东省四会市肿瘤发病与死亡登记资料,选择1990至2003年在中山大学肿瘤防治中心治疗的全部317例四会籍初诊鼻咽癌患者,收集患者的临床与病理资料,分析患者治疗前血清VCA/IgA抗体不同水平与生存期的关系。结果:在临床分期中Ⅲ、Ⅳ期的抗体水平率较Ⅰ、Ⅱ期为高,P=0.01。抗体滴度越高的患者生存时间越短,低水平组(<1∶160)的患者(n=170)与高水平组(≥1∶160)患者(n=147)的5年生存率分别为65.0%和43.0%,P=0.01。多因素分析显示患者的临床分期、性别、治疗年代和EBV-VCA/IgA水平是影响生存期的独立因素。结论:鼻咽癌患者治疗前VCA/IgA抗体水平可能是影响患者生存的独立预后指标。展开更多
文摘With gene engineering EB virus membrane antigen as the diagnostic antigen, indirect immunofluo-rescence (IF) assay was used to detect IgA antibody against EB virus membrane antigen (MA-IgA) in sera from 202 nasopharyngeal carcinoma (NPC) patients and 315 controls (normal and patients with other tumors). MA-IgA antibody was positive in 96.8% of the pretreatment NPC patients with a GMT of 1:36.3. MA-IgA detection by this method was more sensitive than EA-IgA detection by IE. In contrast, patients with tumors other than NPC were negative for MA-IgA antibody. 9.1% of VCA-IgA positive persons were MA-IgA positive with a GMT of less than 1:5. No MA-IgA positive was found in VCA-IgA negatives. The results indicated that this method was relatively specific. In the treatment group, the positive rate and GMT of MA-IgA antibody declined with increase in survival time and the decline was faster than VCA-IgA. When recurrence or distant metastasis developed, similar to VCA-IgA and EA-IgA antibodies, the positive rate and GMT of MA-IgA antibody increased to its pretreatment level. Therefore, MA-IgA detection might be valuable in the early diagnosis and monitor of NPC.
文摘背景与目的:Epstein-Barr病毒VCA/IgA抗体(serum immunoglobulin A against Epstein-Barrvirus capsid antigen,EBV-VCA/IgA)是目前应用最广泛的鼻咽癌诊断指标之一,但它对鼻咽癌预后判断的意义尚不明确。本研究探讨VCA/IgA抗体水平与鼻咽癌患者长期生存的关系,为确立VCA/IgA能否作为鼻咽癌独立的预后指标提供依据。方法:根据广东省四会市肿瘤发病与死亡登记资料,选择1990至2003年在中山大学肿瘤防治中心治疗的全部317例四会籍初诊鼻咽癌患者,收集患者的临床与病理资料,分析患者治疗前血清VCA/IgA抗体不同水平与生存期的关系。结果:在临床分期中Ⅲ、Ⅳ期的抗体水平率较Ⅰ、Ⅱ期为高,P=0.01。抗体滴度越高的患者生存时间越短,低水平组(<1∶160)的患者(n=170)与高水平组(≥1∶160)患者(n=147)的5年生存率分别为65.0%和43.0%,P=0.01。多因素分析显示患者的临床分期、性别、治疗年代和EBV-VCA/IgA水平是影响生存期的独立因素。结论:鼻咽癌患者治疗前VCA/IgA抗体水平可能是影响患者生存的独立预后指标。
