Genotyping and preparation of the recombinant nucleocapsid protein antigen of hantavirus.

Abstract:

OBJECTIVE:To identify new recombinant antigens with potential for diagnosis of hemorrhagic fever with renal syndrome (HFRS) and establish reverse transcription-polymerase chain reaction-restriction fragments length polymorphism (RT-PCR-RFLP) for genotyping of hantavirus. METHODS:One group of primers was used to clone the full-length S genome segment and the partial S genome segment of the N-terminal. The two cloned genes were both fusionally expressed and non-fusionally expressed in the T7 system. The other group of primers was used to establish a RT-PCR method to detect RNAs in 37 virus isolates, 2 positive standard virus strains of hantavirus and 5 negative controls. The method for typing RFLP was set up by digesting the PCR products of 20 virus isolates with Ras I and Hind III. RESULTS:The non-fusionally expressed products with a working concentration of 1:10,000 by chapping enzyme-linked immunosorbent assay (cELISA), presented good biological activity though yields were lower than that of the fusionally expressed products. The specific component of the hantavirus genome (299 bp or 577 bp) was seen in all viral samples. The genotyping of hantavirus showed that 9 out of the total were Hantann (HTN) viruses, 8 were seoul (SEO) viruses and 3 were not determined. CONCLUSIONS:The good working titrer of expressed recombinant antigen showed that it has the potential to replace the natural antigen for detecting hantavirus antibodies. On comparison with cELISA, the detection rates for these two methods were 100% and 84.6%, and the coincidence rate was 84.6%. The former had a 15.4% higher sensitivity than the latter. The typing efficiency of RT-PCR-RFLP and sero-typing method was 85% (17/20) and 55% (11/20), respectively, showing that the former was 30% higher than the latter, while their results were highly consistent.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Tang J,Cao M,Tang T,Wang C,Wei C,Lei W

keywords:

subject

Has Abstract

pub_date

2001-10-01 00:00:00

pages

1030-4

issue

10

eissn

0366-6999

issn

2542-5641

journal_volume

114

pub_type

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