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Development of a portable reverse transcription loop-mediated isothermal amplification system to detect the E1 region of Chikungunya virus in a cost-effective manner.

Benjawan SaechueNaganori KamiyamaYinan WangChiaki FukudaKei WatanabeYasuhiro SogaMizuki GotoAstri DewayaniShimpei ArikiHaruna HiroseSotaro OzakaNozomi SachiShinya HidanoKhaledul FaisalRajashree ChowdhuryMd Anik Ashfaq KhanFaria HossainPrakash GhoshTahmina ShirinDinesh MondalKazunari MurakamiTakashi Kobayashi
Published in: Genes to cells : devoted to molecular & cellular mechanisms (2020)
Chikungunya fever is a mosquito-borne disease cause of persistent arthralgia. The current diagnosis of Chikungunya virus (CHIKV) relies on a conventional reverse transcription polymerase chain reaction assay. Reverse transcription loop-mediated isothermal amplification (RT-LAMP) is a rapid and simple tool used for DNA-based diagnosis of a variety of infectious diseases. In this study, we established an RT-LAMP system to recognize CHIKV by targeting the envelope protein 1 (E1) gene that could also detect CHIKV at a concentration of 8 PFU without incorrectly detecting other mosquito-borne viruses. The system also amplified the E1 genome in the serum of CHIKV-infected mice with high sensitivity and specificity. Moreover, we established a dry RT-LAMP system that can be transported without a cold chain, which detected the virus genome in CHIKV-infected patient samples with high accuracy. Thus, the dry RT-LAMP system has great potential to be applied as a novel CHIKV screening kit in endemic areas.
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