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ASLdC3: A Derivative of Acidic Sophorolipid Disrupts Mitochondrial Function, Induces ROS Generation, and Inhibits

Sandal Deep Basotra1, Yachna Kumari1,2, Mansi Vij1

  • 1Biochemical Engineering Research and Process Development Centre (BERPDC), CSIR-Institute of Microbial Technology (IMTECH), Sector-39A, Chandigarh 160036, India.

ACS Infectious Diseases
|August 2, 2024
PubMed

Insights

Researchers developed a novel molecule, ASLdC3, from acidic sophorolipids. This compound shows potent antifungal activity against Candida species and inhibits biofilm formation, offering a promising new avenue for antimicrobial drug development.

Area of Science:

  • Microbiology and Mycology
  • Medicinal Chemistry
  • Biochemistry

Background:

  • Fungal infections cause millions of severe cases and deaths annually, with Candida species being common pathogens.
  • Existing antifungal treatments face limitations due to toxicity, fungistatic effects, and emerging drug resistance.
  • Virulence factors of Candida albicans include morphological transition, enzyme secretion, and biofilm formation.

Purpose of the Study:

  • To develop a novel antifungal agent derived from acidic sophorolipids.
  • To evaluate the efficacy of the synthesized molecule against Candida species and its antibiofilm properties.
  • To investigate the mechanism of action and assess the safety profile of the novel compound.

Main Methods:

  • Enzyme-catalyzed tailoring of acidic sophorolipids with aryl alcohols to synthesize ASLdC3.
  • Determination of antifungal activity (MIC) and antibiofilm efficacy against Candida species.
  • Assessment of mechanism of action via mitochondrial membrane potential (MMP) and reactive oxygen species (ROS) generation.
  • In vitro toxicity assays and in vivo testing using the C. elegans model.

Main Results:

  • The novel derivative ASLdC3 demonstrated excellent antifungal activity with a Minimum Inhibitory Concentration (MIC) of 8 μg/mL.
  • ASLdC3 exhibited significant antibiofilm properties against Candida albicans and non-albicans Candida species.
  • The compound functions by perturbing mitochondrial function, increasing ROS generation, and damaging fungal cell integrity, leading to cell death.
  • ASLdC3 was found to be non-toxic in vitro and in the C. elegans model, and nonhemolytic.

Conclusions:

  • Acidic sophorolipids can serve as a non-toxic, biodegradable precursor for novel antimicrobial drug design.
  • ASLdC3 represents a promising candidate for developing new antifungal therapies with a unique mechanism of action.
  • The study lays the groundwork for potential clinical applications of modified sophorolipids.
Keywords:
Candida albicansfungal biofilmnovel antifungal agentsophorolipid derivative

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