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M94A1838.TXT
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1994-10-24
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Document 1838
DOCN M94A1838
TI Diagnosis of HIV-1 infection with whole saliva.
DT 9412
AU Ishikawa E; Ishikawa S; Hashida S; Hashinaka K; Saitoh A; Shinagawa H;
Takamizawa A; Oka S; Shimada K; Department of Biochemistry, Miyazaki Med
College, Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):44 (abstract no. 149B). Unique
Identifier : AIDSLINE ICA10/94370737
AB OBJECTIVE: To develop and test an enzyme immunoassay for diagnosis of
HIV-1 infection by detection of anti-HIV-1 IgG in whole saliva. METHOD:
An ultrasensitive enzyme immunoassay (immune complex transfer enzyme
immunoassay) using recombinant reverse transcriptase (R-RT) as antigen
was developed. The immune complex consisting of 2,4-dinitrophenyl
(DNP)-bovine serum albumin-R-RT conjugate, anti-HIV-1 IgG and
R-RT-beta-D-galactosidase (GAL) conjugate was trapped onto anti-DNP
IgG-coated polystyrene balls (PS), eluted with DNP-L-lysine and
transferred to (anti-hIgG gamma-chain) IgG-coated PS. GAL activity was
assayed by fluorometry. RESULTS: Using as little as one microliter of
whole saliva collected by simple spitting without stimulation, the
lowest signals among 45 asymptomatic carriers, 8 patients with
AIDS-related complex and 10 patients with AIDS were 38-, 78- and 3-fold,
respectively, higher than the highest signal among 76 medical students.
Signals for seropositives were proportionally enhanced by increasing the
sample volume up to 100 microliters without significant enhancement of
signals for medical students. Anti-HIV-1 IgG in whole saliva was stable
at -20 degrees C for at least 3.5 months. DISCUSSION AND CONCLUSIONS:
Whole saliva samples containing extremely low levels of anti-HIV-1 RT
IgG, even approximately 2000-fold lower than the lowest level among the
asymptomatic carriers, were expected to be discriminated from those of
seronegatives. Consequently, the sensitivity and specificity were
expected to remain both 100% for a larger number of samples.
DE Acquired Immunodeficiency Syndrome/DIAGNOSIS/IMMUNOLOGY AIDS-Related
Complex/DIAGNOSIS/IMMUNOLOGY Human HIV Antibodies/*ANALYSIS HIV
Antigens HIV Infections/*DIAGNOSIS/IMMUNOLOGY HIV
Seronegativity/IMMUNOLOGY HIV Seropositivity/IMMUNOLOGY
*HIV-1/ENZYMOLOGY/IMMUNOLOGY IgG/ANALYSIS Immunoenzyme
Techniques/STATISTICS & NUMER DATA Reverse Transcriptase/IMMUNOLOGY
Saliva/*IMMUNOLOGY Sensitivity and Specificity MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).