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A competitive lateral flow assay for the detection of tenofovir
Analytica Chimica Acta ( IF 5.7 ) Pub Date : 2018-08-01 , DOI: 10.1016/j.aca.2018.02.039
George W Pratt 1 , Andy Fan 1 , Bissrat Melakeberhan 1 , Catherine M Klapperich 1
Affiliation  

Proper management of an HIV infection requires that a patient be at least 80-95% adherent to a prescribed drug regimen to avoid poor health outcomes and the development of drug-resistant HIV strains. Clinicians generally monitor adherence habits indirectly through patient self-reporting, pill counting, and electronic drug monitoring. While direct measurement of patient samples like urine for monitoring drug levels is possible, it requires specialized equipment and training that is not readily available in resource-limited settings where the need is greatest. In this work we report the development of an antibody that binds to tenofovir (TFV), a key small molecule drug for both the treatment and prevention of HIV, and a competitive lateral flow assay that uses that antibody to monitor urine samples for the presence of the drug. TFV was conjugated to an immunogenic protein and injected into rabbits to raise polyclonal antibodies sensitive to the drug. The antibodies were verified for TFV-sensitivity by immunoprecipitation and HPLC. A gold nanoparticle-based competitive assay was developed to detect the presence of TFV in urine samples with a sensitivity of 1 μg mL-1. This TFV assay could be deployed as a point-of-care device for adherence monitoring in resource-limited settings as a low-cost, accurate, and speedy alternative to current methods to better inform changes in treatment.

中文翻译:

用于检测替诺福韦的竞争性侧流测定

HIV 感染的正确管理要求患者至少 80-95% 遵守规定的药物治疗方案,以避免不良的健康结果和耐药 HIV 菌株的发展。临床医生通常通过患者自我报告、药丸计数和电子药物监测来间接监测依从性习惯。虽然直接测量尿液等患者样本来监测药物水平是可能的,但它需要专门的设备和培训,而在资源有限且需求最大的环境中,这些设备和培训并不容易获得。在这项工作中,我们报告了一种与替诺福韦 (TFV) 结合的抗体的开发,这是一种用于治疗和预防 HIV 的关键小分子药物,以及使用该抗体监测尿液样本中是否存在毒品。TFV 与免疫原性蛋白结合并注射到兔子体内以产生对该药物敏感的多克隆抗体。通过免疫沉淀和 HPLC 验证抗体的 TFV 敏感性。开发了一种基于金纳米颗粒的竞争测定法,用于检测尿液样本中 TFV 的存在,灵敏度为 1 μg mL-1。这种 TFV 检测可以部署为护理点设备,用于在资源有限的环境中进行依从性监测,作为当前方法的低成本、准确且快速的替代方案,以更好地告知治疗变化。
更新日期:2018-08-01
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