Sequence modification of the master regulator Pdr1 interferes with its transcriptional autoregulation and confers altered azole resistance in Candida glabrata
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چکیده
منابع مشابه
Candida glabrata PDR1, a transcriptional regulator of a pleiotropic drug resistance network, mediates azole resistance in clinical isolates and petite mutants.
Candida glabrata, a yeast with intrinsically low susceptibility to azoles, frequently develops increased azole resistance during prolonged treatment. Transposon mutagenesis revealed that disruption of CgPDR1 resulted in an 8- to 16-fold increase in fluconazole susceptibility of C. glabrata. CgPDR1 is a homolog of Saccharomyces cerevisiae PDR1, which encodes a transcriptional regulator of multid...
متن کاملJjj1 Is a Negative Regulator of Pdr1-Mediated Fluconazole Resistance in Candida glabrata
The high prevalence of fluconazole resistance among clinical isolates of Candida glabrata has greatly hampered the utility of fluconazole for the treatment of invasive candidiasis. Fluconazole resistance in this yeast is almost exclusively due to activating mutations in the transcription factor Pdr1, which result in upregulation of the ABC transporter genes CDR1, PDH1, and SNQ2 and therefore in...
متن کاملazole-resistant Candida glabrata
Case report-Subjects-Three cases are described oflong-standing vaginal candidosis due to Candida glabrata. These had failed to respond to local and systemic antifungals. In each case the infecting strain appeared resistant to a range of azole drugs in vitro. Clinical course-Case one-This patient recovered following prolonged treatment with oral itraconazole in combination with oral and vaginal ...
متن کاملAzole resistance in Candida glabrata: coordinate upregulation of multidrug transporters and evidence for a Pdr1-like transcription factor.
Candida glabrata has emerged as a common cause of fungal infection. This yeast has intrinsically low susceptibility to azole antifungals such as fluconazole, and mutation to frank azole resistance during treatment has been documented. Potential resistance mechanisms include changes in expression or sequence of ERG11 encoding the azole target. Alternatively, resistance could result from upregula...
متن کاملMechanisms of azole resistance in petite mutants of Candida glabrata.
We previously showed that resistant colonies of Candida glabrata inside the azole inhibition zones had respiratory deficiency due to mutations in mitochondrial DNA. Here, we analyzed the mechanisms of azole resistance in petite mutants of C. glabrata obtained by exposure to fluconazole or induced by ethidium bromide. The respiratory deficiency of these mutants was confirmed by oxygraphy and flo...
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ژورنال
عنوان ژورنال: FEMS Yeast Research
سال: 2018
ISSN: 1567-1364
DOI: 10.1093/femsyr/foy038