Genotyping of 30 kinds of cutaneous human papillomaviruses by a multiplex microfluidic loop-mediated isothermal amplification and visual detection method.

Abstract:

BACKGROUND:Human papillomaviruses (HPVs), a group of non-enveloped small viruses with double-stranded circular DNA which lead to multiple skin diseases such as benign warts, are commonly seen in clinics. The current HPV detection systems aim mainly at mucosal HPVs, however, an efficient clinical approach for cutaneous HPVs detection is lacking. OBJECTIVES:To establish a rapid detection system for cutaneous HPVs using a colorimetric loop-mediated isothermal amplification (LAMP) with hydroxynaphthol blue (HNB) dye in combination with microfluidic technology. METHODS:L1 DNA sequences of the 30 cutaneous HPVs were chemically synthesized, and LAMP primers against L1 DNA were designed with use of an online LAMP designing tool. Isothermal amplification was performed with use of a water bath and the amplification results were inspected with the naked eye. Using PCR sequencing as a control method, the specificity and sensitivity of the new detection system were obtained by detecting clinical samples. RESULTS:The lower detection limit of the LAMP assay was 107 viral DNA copies/μl when tested on synthesized L1 DNA sequences, which was better than the conventional PCR. Compared to PCR sequencing, the sensitivity of HPV27, HPV2, HPV1, HPV57, HPV3, HPV4, HPV7 and HPV75 genotypes detections were 100%, whereas the specificity was 34.55, 45.12, 95.83, 98.59 and 97.62% respectively, when tested on clinical samples. CONCLUSIONS:The new cutaneous type HPV detection system is characterized by both a good sensitivity and specificity compared to conventional methods.

journal_name

Virol J

journal_title

Virology journal

authors

Wang Y,Ge G,Mao R,Wang Z,Sun YZ,Du YG,Gao XH,Qi RQ,Chen HD

doi

10.1186/s12985-020-01373-3

subject

Has Abstract

pub_date

2020-07-09 00:00:00

pages

99

issue

1

issn

1743-422X

pii

10.1186/s12985-020-01373-3

journal_volume

17

pub_type

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