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香港 - Media OutReach - 2022526- 新冠病毒疫情持续两年多,快速准确的抗体检测方法,除了有助检测人体的抗体含量之外,亦可为相关卫生部门提供参考数据,以制订合适的疫苗接种措施。长远而言,抗体水平数据对流行病学分析及疫苗研发方面亦有一定帮助。有见及此,香港理工大学(理大)应用物理学系研究团队利用有机电化学晶体管技术(OECT),成功研发了一款超灵敏便携式新冠病毒抗体检测仪,此检测仪具备操作简易及检测快速的优点,适用于测试接种疫苗后或感染病毒后的抗体水平。1.jpg
香港理工大学(理大)应用物理学系研究团队成功研发了一款超灵敏便携式新冠病毒抗体检测仪。理大应用物理学系教授严锋教授(左)及理大医疗科技及信息学系副教授罗嘉慧博士(右)出席发布会介绍。
目前测试人体是否存有新冠病毒「免疫球蛋白G抗体(IgG)」,需要到医院或专业的检测机构抽取血清样本,使用大型医疗设备以酶联免疫法(ELISA)测试抗体浓度,由测试到取得结果,需时大约两天,且检测成本高。至于另一种以侧流式免疫测定法(LFIA)的抗体快速诊断方案,其灵敏度则较低,不能测量抗体含量的水平。2.jpg
理大研究团队所研发的新冠病毒抗体检测仪则具有高灵敏度、便携、快速、操作简易及低成本多项优点。
理大研究团队所研发的新冠病毒抗体检测仪则具有高灵敏度、便携、快速、操作简易及低成本多项优点。检测程序非常简单,首先启动检测仪,将检测仪与手机应用程序透过蓝牙连接,将10uL唾液(亦可使用血清)样本滴在检测仪的晶体管测试区,让抗体与抗原产生反应,五分钟后将唾液样本吸走,再将电解质滴在测试区。在手机应用程序上按键开始检测,大约20秒后,手机应用程序便会显示唾液样本的抗体水平。使用此抗体检测仪的整个检测过程,需时少于六分钟,每次检测成本亦仅约港币十元。抗体检测仪可检测抗体的浓度范围由低于10fM至高于100nM,足以覆盖人体唾液内的抗体水平,合乎对唾液的精细分析所需的灵敏度。负责是次研究项目的理大应用物理学系教授严锋教授表示:「是项研究利用崭新技术在晶体管的闸极施加电压脉冲,可加速『免疫球蛋白G抗体』与抗原的反应作用,大大减少整个检测程序所需的时间,而且过程属非入侵性,即只需唾液而无需抽血,可发展为自行采样的检测模式。此外,检测仪只需配合手机进行操作及查阅结果,十分简单方便,适合需要进行实时检测及大量筛查工作的场景使用。」研究团队的下一步计划是申请研究资助,以进行临床研究,届时将与不同的医疗及检测机构合作。团队期望是次研究成果可尽快推出市场,以及将此崭新的检测仪应用于检测其他病毒的抗体,为对抗不同疾病,以及对流行病学分析及疫苗研发方面作出贡献 #理大

Source https://www.media-outreach.com/news/hong-kong/2022/05/26/139512/