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Unravelling azole resistance in fungal pathogens: molecular mechanisms, diagnostic challenges, and therapeutic
Chetana S Eknure1, Aditi P Agarwal2, Yogeshwar Bachhav1
1Adex Pharma™, Tilak Nagar, Chembur, Mumbai, Maharashtra, 400089, India.
Abstract:
The global recognition of azole resistance in fungal infection is steadily increasing and is perceived as a serious health threat, particularly among immunocompromised individuals. The rise in resistance is governed by multifactorial mechanisms including mutations in ERG11/CYP5A, overexpression of efflux transporters, and biofilm formation which enables pathogenic fungi to evade azole's antifungal activity. Most of the conducted work currently examines distinct processes without relating them to the broader issue, such as therapy inadequacies and diagnostic challenges, even though azole resistance continues to rise in clinical relevance. This review is focused on addressing this gap by providing comprehensive information into one framework for azole resistance. It presents the molecular basis of resistance, highlighting mechanisms such as target enzyme modification, efflux pump overexpression, biofilm-mediated protection, and transcriptional regulation of various fungal pathogens with an emphasis on Candida species. Also, we critically evaluated the strengths and limitations of currently used diagnostic platforms and explored therapeutic strategies, including novel antifungal agents, drug repurposing, immunotherapy, antifungal peptides, and stewardship models. Along with the long-established methods for combating the fungal infections, it also maneuvers through the contemporary approaches of omics and sophisticated bioinformatics tools employed in fungal research. By bridging the mechanistic insights with clinical and ecological relevance, this review aims to shed light on the development of precision diagnostics, novel antifungal targets, and integrative policy approaches to mitigate resistance and improve patient outcomes. Along with it, the article also traverses through the development of fourth generation azoles in combating fungal invasion.
Insights
Azole resistance in fungal infections is a growing threat due to mechanisms like gene mutations and efflux pumps. This review integrates resistance mechanisms, diagnostics, and therapies to improve patient outcomes.
Area of Science:
- Mycology
- Antimicrobial Resistance
- Molecular Biology
Background:
- Azole resistance in fungal infections is a significant and increasing global health concern, especially for immunocompromised patients.
- Resistance arises from multifactorial mechanisms including ERG11/CYP5A mutations, efflux transporter overexpression, and biofilm formation.
- Current research often examines resistance mechanisms in isolation, neglecting broader therapeutic and diagnostic challenges.
Purpose of the Study:
- To address the gap in understanding azole resistance by providing a comprehensive framework.
- To integrate molecular mechanisms, diagnostic limitations, and therapeutic strategies for azole resistance.
- To highlight the clinical and ecological relevance of fungal resistance and potential solutions.
Main Methods:
- Literature review focusing on molecular mechanisms of azole resistance.
- Critical evaluation of current diagnostic platforms for fungal infections.
- Exploration of existing and novel therapeutic strategies, including omics and bioinformatics tools.
- Discussion of fourth-generation azoles and integrative policy approaches.
Main Results:
- Detailed presentation of molecular resistance mechanisms (e.g., target modification, efflux pumps, biofilms) in fungal pathogens, particularly Candida species.
- Evaluation of strengths and limitations of current diagnostic methods.
- Overview of therapeutic avenues: novel agents, drug repurposing, immunotherapy, peptides, stewardship, and fourth-generation azoles.
- Integration of omics and bioinformatics in fungal research.
Conclusions:
- Bridging mechanistic insights with clinical relevance is crucial for developing precision diagnostics and novel antifungal targets.
- Integrative policy approaches are needed to mitigate azole resistance and improve patient outcomes.
- Advancements in understanding and combating fungal resistance are essential for public health.
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