Publications by authors named "Yukie Takano"

Article Synopsis
  • 3,6-Epidioxy-1,10-bisaboladiene (EDBD) is a compound derived from a wild edible plant in Japan that causes cell death in HL-60 cells primarily through necrosis rather than apoptosis.
  • The mechanism involves ferrous ion-dependent oxidative stress, leading to lipid peroxidation and damage to cell membranes, which is not prevented by typical apoptosis inhibitors.
  • EDBD also reduces levels of GPX4 and GSH, key proteins in cellular defense, indicating it promotes a ferroptosis-like death pathway through lipid peroxidation.
View Article and Find Full Text PDF

Drug susceptibility tests were performed with a series of Candida spp. in media supplemented with serum or bile. The azole susceptibilities of several medically important Candida spp.

View Article and Find Full Text PDF

Protein phosphatases are critical for the regulation of many cellular processes. Null mutants of 21 putative protein phosphatases of Candida albicans were constructed by consecutive allele replacement using the URA3 and ARG4 marker genes. A simple silkworm model of C.

View Article and Find Full Text PDF

Novel inhibitors of fungal ATP-binding cassette transporters were obtained by screening compounds and crude extracts from marine-derived fungi and bacteria using disk diffusion assays of Saccharomyces cerevisiae strains overexpressing a variety of fungal multi-drug efflux pumps. The cyclodepsipeptides unnarmicin A and unnarmicin C were able to sensitize cells overexpressing azole drug pumps ScPdr5p, CaCdr1p, CgCdr1p, and CgPdh1p to sub-MIC concentrations of fluconazole without affecting the growth of CaCdr2p and CaMdr1p overexpressing cells. Unnarmicin A and unnarmicin C were potent inhibitors of rhodamine 6G efflux of CaCdr1p expressing cells with IC50 values of 3.

View Article and Find Full Text PDF

Objectives: The uptake of endogenous sterol from serum may allow Candida glabrata to survive azole treatment. This study aims to determine the contribution of a sterol transporter that alters fluconazole sensitivity in the presence of serum.

Methods: Bioinformatic analysis predicted CgAUS1 as the C.

View Article and Find Full Text PDF

The in vivo contribution of reactive oxygen species produced by neutrophils against Cryptococcus infection is not widely recognized. Myeloperoxidase (MPO) is a neutrophil-specific enzyme that catalyses the production of hypohalous acids such as HOCl from H2O2. This study investigated the role of MPO in immunological defence against Cryptococcus neoformans in an MPO-deficient (MPO-/-) mouse model.

View Article and Find Full Text PDF

Clinically important resistance of fungal pathogens to azole antifungal drugs is most frequently caused by the over-expression of energy-dependent drug efflux pumps. These pumps usually belong to either the ATP-binding cassette (ABC) family or the Major Facilitator Superfamily (MFS) class of membrane transporter. Little is known about how these pumps work and there is an urgent need to develop pump antagonists that circumvent azole resistance.

View Article and Find Full Text PDF

Saccharomyces cerevisiae Hsl1p is a Ser/Thr protein kinase that regulates cell morphology. We identified Candida albicans CaHSL1 and analysed its function in C. albicans.

View Article and Find Full Text PDF

Myeloperoxidase (MPO) is located within neutrophils capable of producing HOCl. To define the in vivo role of MPO, we have generated MPO-knockout (MPO-KO) mice. The mice without MPO developed normally.

View Article and Find Full Text PDF

Objectives: Information on the function of Candida albicans ATP-binding cassette (ABC) membrane transporter Cdr1p has come from studying the effect of gene inactivation in C. albicans and from heterologous Cdr1p expression in the yeast Saccharomyces cerevisiae. These approaches, however, give only an indirect indication of Cdr1p function in C.

View Article and Find Full Text PDF

Oxygen metabolites generated by myeloperoxidase (MPO) and nicotinamide adenine dinucleotide phosphate (NADPH)-oxidase contribute to microbial killing by phagocytes. To compare the importance of the 2 enzymes for host defense, MPO-deficient (MPO(-/-)) mice and NADPH-oxidase-deficient mice with chronic granulomatous disease (CGD mice) were intraperitoneally infected with 3 different doses of Candida albicans, and their infection severity was analyzed. CGD mice had increased mortality and exhibited increased tissue fungal burden in a dose-dependent manner, whereas normal mice showed no symptoms.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionnqutlo041bka2c2ml0374v4g9hoct9eq): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once