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M94A2739.TXT
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1994-10-25
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Document 2739
DOCN M94A2739
TI p24 in serum from HIV-1 seropositives.
DT 9412
AU Hashida S; Hashinaka K; Nishikata I; Oka S; Shimada K; Saitoh A;
Shinagawa H; Takamizawa A; Ishikawa E; Department of Biochemistry,
Medical College of Miyazaki, Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):236 (abstract no. PB0374). Unique
Identifier : AIDSLINE ICA10/94369836
AB OBJECTIVE: To test the positivity of p24 assayed by a new enzyme
immunoassay (EIA) in sera from HIV-1 seropositives. METHOD: An
ultrasensitive two-site enzyme immunoassay (two-site complex transfer
enzyme immunoassay) was developed. The immune complex consisting of
2,4-dinitrophenyl (DNP)-biotinyl-bovine serum albumin-anti-p24 Fab', p24
and anti-p24 Fab'-beta-D-galactosidase (GAL) conjugate was trapped onto
anti-DNP IgG-coated polystyrene balls (PS), eluted with DNP-L-lysine and
transferred to streptavidin-coated PS. GAL activity bound to the last PS
was assayed by fluorometry. RESULTS: The detection limit of p24 was 0.24
ng/l using 10 microliters of serum. p24 was detected in 50 out of 79
sera from seropositives (25 out of 50 sera from asymptomatic carriers
(AC) and 25 out of 29 sera from advanced patients) and all negative in
100 sera from seronegatives. Thus, the sensitivity and specificity of
the assay were 64% and 100%, respectively. Furthermore, after
acid-treatment of serum, the sensitivity increased to 75% (68% even for
AC) with no change in the specificity. DISCUSSION AND CONCLUSIONS: The
sensitivity of the new assay was apparently superior to those of
commercially available kits. The high positivity of p24 assayed by the
method in sera may allow us to use p24 a useful surrogate marker.
DE Human HIV Core Protein p24/*BLOOD HIV
Seropositivity/CLASSIFICATION/*DIAGNOSIS/IMMUNOLOGY HIV-1/*IMMUNOLOGY
*Immunoenzyme Techniques Predictive Value of Tests MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).