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Home Science News Technology and Engineering

Laser Therapy Boosts Efficacy Against Fungus Resistant to Traditional Medications

August 12, 2025
in Technology and Engineering
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In a groundbreaking study published in the journal “Photochemistry and Photobiology,” researchers from the Optics and Photonics Research Center (CePOF) have unveiled a novel approach to combat the growing threat of antimicrobial resistance posed by various pathogens, particularly the fungus Candida albicans. This ubiquitous microorganism, often harmless in its yeast form, can transform into a virulent invasive pathogen under certain conditions. The emergence of antifungal resistance has made infections with C. albicans increasingly difficult to treat. Traditional antifungal agents are becoming less effective, underscoring the urgent need for new therapeutic strategies.

The recent research focuses on photodynamic inactivation (PDI) therapy, a light-activated treatment that utilizes the activation of molecules to generate reactive oxygen species capable of inducing cellular damage in pathogens. Combining PDI with the antifungal drug amphotericin B (AmB) has demonstrated remarkable success, significantly enhancing its efficacy against both yeast and hyphal forms of C. albicans. In laboratory settings, this combination therapy achieved a 75% reduction in yeast growth and an impressive 87.5% decrease in hyphal proliferation. These findings highlight the potential of light-based therapies in enhancing the effectiveness of existing antifungal medications.

Photodynamic therapy operates on a fascinating principle: a photosensitive molecule, in this case, curcumin extracted from turmeric, is primarily activated by a specific wavelength of light. When exposed to blue light, curcumin generates free radicals in the presence of oxygen, leading to oxidative stress and, ultimately, the death of C. albicans. This innovative approach successfully penetrated the biofilm formed by hyphae—a structure that often impedes the effectiveness of conventional antifungal treatments—thus opening a new avenue for combating fungal infections.

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The research team, led by Vanderlei Bagnato from CePOF, emphasizes the critical nature of this work. C. albicans, while present in the human microbiome, can cause a range of infections, from superficial candidiasis to severe systemic infections, especially in immunocompromised individuals. The rising comorbidity of fungal infections with increased levels of antibiotic resistance highlights the need for therapies that are not only effective but also have minimal side effects. The PDI approach, using curcumin, embodies this vision as it is generally regarded as safe for human health.

The study’s authors are optimistic about extending the PDI methodology to other pathogenic fungi, particularly focusing on Candida auris, an emerging and formidable foe known for its resistance to multiple antifungal agents. The urgent need to address the growing threat of C. auris is clear, and the successful application of PDI in C. albicans serves as a promising proof of concept for tackling more resistant strains.

Beyond its implications for human health, this research opens doors to applications in food safety. The decontamination of food products, such as grains, could significantly reduce fungal contamination using similar photodynamic therapies. By applying PDI to storage silos, for example, researchers can explore its potential to prevent spoilage and ensure food safety. This dual approach positions PDI as a multifaceted tool in combating both health-related and food-related fungal threats.

The study’s promising results fuel the researchers’ commitment to refining and adapting photodynamic therapies for a variety of medical and agricultural challenges. The versatility of this technique lies in its ability to utilize different wavelengths of light for treating various types of infections. Blue light proves effective for superficial infections affecting the throat, while red and infrared light could be employed to treat deeper infections like pneumonia.

Continuing their exploration, the researchers are investigating the safest and most effective ways to deliver these light-based therapies. They aim to develop devices that can adequately target infected areas, enhancing the precision of treatment without causing harm to healthy tissues. For instance, treatments directed at the tonsils could effectively address throat infections while ensuring minimal discomfort to patients.

The significance of this research extends beyond the laboratory. It provides a foundation for developing partnerships and collaborations that can foster further advancements in photodynamic therapies. As the global health landscape evolves, so too must our responses to emerging and resistant pathogens. The integration of physics and biotechnology in CePOF’s research exemplifies a collaborative effort to devise ingenious solutions to complex health challenges.

Amidst rising antifungal resistance, the quest for innovative therapeutic strategies becomes ever more critical. This study is a testament to the potential of combining established treatments with cutting-edge technology in the relentless pursuit of better health outcomes. Its success in augmenting antifungal efficacy against C. albicans could inspire renewed confidence in the possibilities of photodynamic therapy as a formidable weapon against other infectious diseases.

As the world grapples with interconnected health and food safety issues, the research undertaken by CePOF offers a beacon of hope. The combination of unconventional therapies with existing drug regimens heralds the dawn of a new era in medical technology, where light-mediated treatments may soon become routine practice. The implications of this research are vast, showing that not only can we expand our arsenal against fungal resistance, but we can also pave the way for more sustainable and effective health interventions in the future.

In summary, the pioneering work conducted by the researchers at CePOF provides a crucial foundation for future innovations in the fight against fungal infections and resistance. As they embark on further studies, the integration of science, health, and safety continues to inform their approach, promising a brighter future for patients and food safety alike.

Subject of Research: Photodynamic inactivation of Candida albicans
Article Title: Overcoming resistance of Candida albicans using photodynamic inactivation
News Publication Date: May 15, 2025
Web References: www.fapesp.br/en, www.agencia.fapesp.br/en
References: DOI 10.1111/php.14108
Image Credits: Gabriela G. Guimarães et al.

Keywords: Candida albicans, photodynamic inactivation, microbial resistance, antifungal therapy, curcumin, food safety, light-activated therapy, C. auris.

Tags: antimicrobial resistance solutionsbreakthroughs in antifungal researchCandida albicans treatment advancementscombination therapy for antifungal resistancecurcumin in phototherapyenhancing efficacy of amphotericin Binnovative treatments for resistant pathogenslaser therapy for fungal infectionslight-activated antifungal strategiesnovel approaches to fungal infectionsphotodynamic inactivation therapyreactive oxygen species in pathogen control
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