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1996-03-09
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Document 0160
DOCN M9650160
TI Increased expression of Candida albicans secretory proteinase, a
putative virulence factor, in isolates from human immunodeficiency
virus-positive patients.
DT 9605
AU Ollert MW; Wende C; Gorlich M; McMullan-Vogel CG; Borg-von Zepelin M;
Vogel CW; Korting HC; Department of Dermatology,
Ludwig-Maximilians-Universitat; Munchen, Germany.
SO J Clin Microbiol. 1995 Oct;33(10):2543-9. Unique Identifier : AIDSLINE
MED/96087184
AB The increased prevalence and the severity of oropharyngeal candidiasis
in human immunodeficiency virus (HIV)-positive patients are attributed
exclusively to the virus-induced immune deficiency of the host. The
present study was aimed at answering the question of whether Candida
albicans secretory proteinase, a putative virulence factor of the
opportunistic C. albicans yeast, has any potential influence on the
clinical manifestation of oropharyngeal candidiasis in HIV-positive
patients. We measured the secretory proteinase activities of clinical C.
albicans isolates from the oropharynges of either HIV-positive
individuals (n = 100) or a control group (n = 122). The mean secretory
proteinase activity of C. albicans isolates from the HIV-positive group
(4,255 +/- 2,372 U/liter) was significantly higher compared with that of
isolates from the control group (2,324 +/- 1,487 U/liter) (P < 0.05).
The higher level of secretory proteinase activity in the culture
supernatants of individual C. albicans isolates correlated with the
increased level of proteinase expression on the cell surface, as
revealed by cytofluorometry, and with higher levels of secretion of the
immunodetectable protein, as shown by Western blotting (immunoblotting).
Proteinase activity within the population of C. albicans isolates from
HIV-positive individuals was independent of the patient's clinical
disease stage and the CD4+/CD8+ cell numbers. Furthermore, no
correlation of the proteinase activities with the C. albicans serotype
was found, although C. albicans serotype B was significantly more
frequent in the HIV-positive group (40%) compared with that in the
control group (12%). However, a positive correlation of proteinase
activity to antifungal susceptibility was evident.(ABSTRACT TRUNCATED AT
250 WORDS)
DE Adult Age Factors Aged Antifungal Agents/PHARMACOLOGY Blotting,
Western Candida albicans/IMMUNOLOGY/ISOLATION & PURIF/*PATHOGENICITY
Candidiasis, Oral/*ENZYMOLOGY/ETIOLOGY/IMMUNOLOGY Comparative Study
Female Flow Cytometry Human HIV Infections/*COMPLICATIONS
Immunoassay Male Microbial Sensitivity Tests Middle Age Peptide
Peptidohydrolases/*SECRETION Serotyping JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).