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. 1995 Dec;33(12):3201–3208. doi: 10.1128/jcm.33.12.3201-3208.1995

Quantitation of human immunodeficiency virus type 1 DNA by two PCR procedures coupled with enzyme-linked oligosorbent assay.

F Mallet 1, C Hebrard 1, J M Livrozet 1, O Lees 1, F Tron 1, J L Touraine 1, B Mandrand 1
PMCID: PMC228674  PMID: 8586703

Abstract

Two quantitative PCR methods with our nonisotopic enzyme-linked oligosorbent assay (ELOSA) in microtiter plate format were developed for quantitation of human immunodeficiency virus type 1 (HIV-1). Quantitative competitive PCR (QC-PCR) was based on the coamplification of the wild-type nef region with a mimic competitive nef gene template carrying mutations in the capture region. Correlation of wild-type HIV-1 nef DNA to mimic template copy number permitted quantitation of HIV-1 copy numbers in the range of 20 to 2,000 copies per micrograms of DNA. Internally controlled PCR (IC-PCR) was based on coamplification of the nef region and the ras gene as an internal endogenous standard. Correlation to known amounts of HIV-1 DNA permitted quantitation by IC-PCR of HIV-1 copy numbers in the range of 10 to 2,000 copies per microgram of DNA. QC- and IC-PCR-ELOSA were performed on a panel of 53 seropositive patients and 12 seronegative controls. The methods showed similar coefficients of variation below 24%. Quantitations by QC- and IC-PCR-ELOSA were identical for 77% of patient samples. The copy level ranged between 443 +/- 156 and 21,453 +/- 13,511 copies per 10(5) CD4 cells for asymptomatic and AIDS patients, respectively. The simplicity and reliability of QC- and IC-PCR-ELOSA methods make them appropriate for routine laboratory use in the quantitation of viral and bacterial DNAs.

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Selected References

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