virulence factors – Page 3

Fungus-targeted nanomicelles enable microRNA delivery for suppression of virulence in Aspergillus fumigatus as a novel antifungal approach

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Researchers developed a new way to fight dangerous fungal infections caused by Aspergillus fumigatus by using tiny particles called nanomicelles to deliver genetic material (microRNAs) directly into fungal cells. These microRNAs target and reduce the production of melanin, a protective pigment that helps the fungus resist immune attacks. By weakening this defense, the fungal cells become more vulnerable to the body’s immune system and to stress, offering a novel approach to treat serious fungal infections that have become resistant to standard antifungal drugs.

SUB6 Subtilisin is Involved During the Initial Adhesion of Trichophyton benhamiae and T. mentagrophytes onto Reconstructed Human Epidermis

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Researchers studied a fungal protease called SUB6 produced by common skin infection-causing fungi. Using engineered fungi lacking this protein, they found that SUB6 helps fungi initially stick to skin but isn’t absolutely required for infection. The fungi can compensate by producing other proteases, suggesting SUB6 might be better used as a diagnostic marker to detect fungal infections rather than as a drug target.

A human-relevant alternative infection model for mucormycosis using the silkworm Bombyx mori

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Researchers developed a silkworm-based model to study mucormycosis, a deadly fungal infection. The model reproduces the same disease patterns and risk factors seen in humans, including effects of steroids and iron levels. Importantly, it successfully predicted how well antifungal drugs work against the infection, offering a faster and more ethical alternative to mammal testing for developing new treatments.

Transcriptomic changes in the PacC transcription factor deletion mutant of the plant pathogenic fungus Botrytis cinerea under acidic and neutral conditions

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Gray mold is a common fungal disease affecting many plants, and it survives by adjusting to different pH levels in plant tissues. Scientists studied a specific protein called PacC that acts like a switch controlling which genes turn on or off based on acidity levels. By comparing normal fungi to mutants without this protein, researchers identified hundreds of genes that help the fungus adapt and cause disease, offering insights into how to potentially combat this agricultural problem.

Genome sequencing and analysis of isolates of Cytospora sorbicola and Cytospora plurivora associated with almond and peach canker

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This study provides genetic blueprints for two dangerous fungal pathogens that damage almond and peach orchards by causing canker diseases. Scientists sequenced the complete genomes of these fungi and identified genes responsible for their ability to infect plants, finding that they’ve evolved special abilities to survive in nutrient-poor bark tissue. This genetic information could help farmers develop fruit trees resistant to these infections. The research also clarifies the identity of a newly described fungal species, showing it’s actually the same as a previously known species.

Is Cryptococcus neoformans a pleomorphic fungus?

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Researchers have discovered that Cryptococcus neoformans, a dangerous fungus that causes serious infections, is actually much more shape-shifting than previously thought. Instead of existing as just one simple budding yeast form, the fungus can transform into several different cell types including large ‘titan cells’ and small ‘seed cells,’ each with different characteristics that help it survive and spread in the body. These different forms have distinct genetic programs and can evade the immune system in different ways, making the infection harder to treat. This discovery fundamentally changes how scientists understand this pathogen and could lead to new treatment strategies.

Past, present and future of antifungals: Advancements in mechanisms of action and resistance

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Fungal infections are a growing global health threat, especially for people with weakened immune systems, causing millions of deaths annually. Currently available antifungal drugs are limited and increasingly face resistance, making them less effective over time. This special collection of research papers explores new approaches to treating fungal infections, including novel drugs, combination therapies, and alternative treatments to overcome resistance. Scientists and doctors hope these advances will help save more lives by providing better options for treating serious fungal diseases.

Interaction with amoeba drives virulence-associated phenotypes in the Candida haemulonii complex

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Researchers discovered that when fungal pathogens called Candida haemulonii are exposed to soil amoebae in laboratory conditions, they develop enhanced disease-causing abilities. These fungi undergo multiple changes including forming stronger protective biofilms, producing more virulence factors, and becoming harder to kill by immune defenses. This suggests that fungal pathogens might develop some of their dangerous traits not from infecting humans, but from surviving in soil environments where they must evade predatory organisms like amoebae.

Complete genome sequence analysis of Boeremia exigua, a fungal pathogen causing leaf spot disease of Panax notoginseng

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Panax notoginseng, a valuable traditional Chinese medicinal plant, has been affected by a fungal leaf spot disease caused by Boeremia exigua. Researchers sequenced the complete genome of this fungal pathogen for the first time, discovering important genes responsible for its ability to infect plants, including enzymes that break down plant cell walls and proteins that help it evade plant defenses. This genetic information provides a foundation for developing better strategies to protect these valuable medicinal plants from disease.

Genome characterization of Trichophyton mentagrophytes genotype VII strain PG12DES from Italy

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Researchers in Italy analyzed the genetic makeup of a fungus called Trichophyton mentagrophytes that causes skin infections and appears to spread between people through sexual contact. The fungal strain studied was susceptible to all tested antifungal medications and shared similarities with a strain previously found in Moldova. This study helps doctors understand how this emerging fungal infection spreads globally and whether it’s developing resistance to treatments.

Research Keyword: virulence factors