Possible role of hydrolytic enzymes (Sap, Kex2) in Candida albicans response to aromatic compounds bearing a sulfone moiety

Małgorzata Bondaryk , Ilona Grabowska-Jadach , Zbigniew Ochal , Grażyna Sygitowicz , Monika Staniszewska

Abstract

Hydrolytic enzymes e.g., Saps and KEX2 are, due to their role in Candida virulence, considered important targets for new synthetic inhibitors. MICTI and MICPI values indicate that disruption of SAP1-3 significantly increases the resistance of Candida mutants to β-ketosulfone (1). Contrariwise, sap123δ showed sensitive phenotype to halogenated methylphenyl sulfone (2). Anticandidal potency of 2 differed in the Candida cells of kex2δ. Sulfone is the most effective agent against the Candida albicans kex2δ double mutant (MICTI of 0.5 μg mL-1). Up-regulation of KEX2 mediated the resistance of sap4-6δ towards 2. Both sulfones tested reduced the adhesion of the wild type cells significantly (P ≤ 0.05). Contrariwise, sap123δ showed significantly enhanced adhesion capability when 1 was used (P ≤ 0.05). Both sulfones had weak fungicidal effect on mature C albicans biofilms. It was shown that the uptake of IP correlates with the membrane perturbations caused by 1 in the blastoconidial cells. Sulfones were found to disturb the basic developmental phases of biofilm growth: adhesion and morphogenesis. Altered KEX2 levels for 1 can be caused by the compensatory mechanism for the maintenance of cell wall integrity and morphogenesis. KEX2 decreases the antifungal activity of sulfones. Sulfones affecting the crucial virulence factors of Candida can even eliminate these fungal infections.
Author Małgorzata Bondaryk
Małgorzata Bondaryk,,
-
, Ilona Grabowska-Jadach ZMB
Ilona Grabowska-Jadach,,
- Department Of Microbioanalytics
, Zbigniew Ochal ZTiBSL
Zbigniew Ochal,,
- Department Of Drug Technology And Biotechnology
, Grażyna Sygitowicz
Grażyna Sygitowicz,,
-
, Monika Staniszewska
Monika Staniszewska,,
-
Journal seriesChemical Papers, ISSN 0366-6352
Issue year2016
Vol70
No10
Pages1336-1350
Publication size in sheets0.7
Keywords in EnglishAntifungal activity; Candida albicans; KEX2 serine protease; secreted aspartyl proteinases (Saps); sulfone derivatives
DOIDOI:10.1515/chempap-2016-0072
URL http://www.degruyter.com/view/j/chempap.2016.70.issue-10/chempap-2016-0072/chempap-2016-0072.xml
Languageen angielski
File
Chemical Papers2016.pdf 1.91 MB
Score (nominal)20
ScoreMinisterial score [Punktacja MNiSW] = 20.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) [Punktacja MNiSW (2013-2016)] = 20.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2016 = 1.258 (2) - 2016=1.194 (5)
Citation count*0 (2016-08-24)
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