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M9650028.TXT
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1996-03-09
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Document 0028
DOCN M9650028
TI In situ polymerase chain reaction technique revealed by flow cytometry
as a tool for gene detection.
DT 9605
AU Gibellini D; Zauli G; Re MC; Furlini G; Lolli S; Bassini A; Celeghini C;
La Placa M; Institute of Microbiology, University of Bologna, Italy.
SO Anal Biochem. 1995 Jul 1;228(2):252-8. Unique Identifier : AIDSLINE
MED/96171045
AB We report a methodology for detecting specific DNA sequences directly
inside cells, combining in situ PCR and flow cytometry. This technique
is based on in situ PCR performed in the presence of digoxigenin-labeled
dUTP to obtain a digoxigenin-labeled amplicon, which is then revealed by
an anti-digoxigenin polyclonal antibody directly conjugated to
fluorescein. Fluorescence intensity is next evaluated by flow cytometry.
Our experimental models were represented by the lymphoblastoid cell
lines 8E5LAV, carrying an integrated HIV-1 DNA proviral copy per cell,
and A.301, infected in vitro with HIV-1 (strain IIIB). The technique is
described in detail with particular attention to the optimization of
critical fixation and permeabilization steps. This method allows not
only the detection but also an accurate quantification of the number of
positive cells in a background of negative cells. Moreover, it has the
potentiality to develop into a multiparametric method for the
simultaneous study of specific DNA or RNA sequences and surface or
intracellular markers.
DE Base Sequence Cell Line Cell Membrane Permeability Cloning, Molecular
Digoxigenin DNA, Viral/*ANALYSIS *Flow Cytometry Gene Products,
gag/ANALYSIS HIV-1/*GENETICS In Situ Hybridization
Lymphocytes/VIROLOGY Models, Biological Molecular Sequence Data
Polymerase Chain Reaction/*METHODS Stem Cells/VIROLOGY Support,
Non-U.S. Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).