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1996-02-27
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Document 0433
DOCN M9630433
TI Flow cytometric immunodetection of human immunodeficiency virus type 1
proviral DNA by heminested PCR and digoxigenin-labeled probes.
DT 9603
AU Yang G; Garhwal S; Olson JC; Vyas GN; Department of Laboratory Medicine,
University of California, San; Francisco 94143-0134, USA.
SO Clin Diagn Lab Immunol. 1994 Jan;1(1):26-31. Unique Identifier :
AIDSLINE MED/96050774
AB PCR is the most sensitive and direct method for detecting blood-borne
viruses, as well as an efficient means for producing vector-free probes.
However, the application of PCR, especially in the laboratory diagnosis
of human immunodeficiency virus (HIV) infection, is impeded by the
current use of radiolabeled oligonucleotide probes. Therefore, we have
developed a nonisotopic PCR immunoreactive bead (PCR-IRB) assay to
detect HIV type 1 proviral DNA from peripheral blood mononuclear cells
(PBMC). We used a biotinylated primer in a set of three oligonucleotides
selected from the HIV long terminal repeat region for heminested PCR
amplification. An internal probe was synthesized by PCR with
incorporation of digoxigenin-labeled dUTP. After solution hybridization
of the probe with PCR-amplified products (amplicons), the hybridized DNA
was captured with streptavidin-coated magnetic beads. For the detection
of hybrids, flow cytometric analyses were carried out by two procedures:
(i) direct detection with fluorescein isothiocyanate (FITC)-labeled
antidigoxigenin immunoglobulin G (IgG) antibody and (ii) indirect
detection with antidigoxigenin sheep IgG antibody followed by
FITC-labeled anti-sheep IgG antibody. Both procedures in the PCR-IRB
assay detected two to three copies of HIV proviral DNA sequences, a
sensitivity that is comparable with that of the conventional radioactive
detection of amplicons following probe hybridization and
electrophoresis. To compare the PCR-IRB assay with the conventional
method, we tested 53 pedigreed PBMC specimens from blood donors and
newborns; the results obtained were identical. This nonisotopic PCR-IRB
assay can also be automated for potential application in laboratory
diagnosis of HIV infection, blood bank screening, and therapeutic
monitoring of viremia and perinatal transmission.
DE Base Sequence Comparative Study Digoxigenin DNA Primers *DNA Probes
DNA, Viral/*ISOLATION & PURIF Female *Flow Cytometry Human
HIV-1/*GENETICS/ISOLATION & PURIF Immunomagnetic Separation Infant,
Newborn Leukocytes, Mononuclear/VIROLOGY Microspheres Molecular
Sequence Data Polymerase Chain Reaction/*METHODS
Proviruses/*GENETICS/ISOLATION & PURIF Support, U.S. Gov't, P.H.S.
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).