Candida albicans biofilm and hyphal transition machinery

Candida albicans is a polymorphic fungus that can transition between yeast, pseudohyphal, and hyphal forms, a process critical for its pathogenicity (Sudbery, 2011). The biofilm and hyphal transition machinery comprises a complex network of signaling pathways, such as the Ras1-cAMP-PKA and MAPK pathways, and key transcription factors like Efg1, Bcr1, and Nrg1 (Nobile & Johnson, 2015). These components regulate the expression of hypha-specific genes (HSGs) and cell wall proteins like Hwp1 and Als3, which are essential for adhesion and biofilm maturation (Lu et al., 2014). Biofilms provide a protective environment that enhances resistance to conventional antifungal agents and host immune responses, making this machinery a prime target for anti-virulence therapies (Gullo et al., 2013). Drugs targeting this system aim to prevent the transition to the invasive hyphal form or disrupt the structural integrity of biofilms without necessarily killing the fungus, thereby reducing the selective pressure for resistance (Nobile & Johnson, 2015). Current research focuses on small molecule inhibitors and quorum-sensing molecules like farnesol to modulate these pathways (Gullo et al., 2013). Additionally, targeting molecular chaperones like Hsp90 has shown promise in compromising the stability of the signaling molecules involved in this transition (Shapiro et al., 2011). This approach offers a strategy to combat multi-drug resistant Candida strains by attenuating virulence rather than growth.

Other names

Yeast-to-hypha transition pathwayCandida albicans filamentation machineryBiofilm regulatory networkDimorphic transition machineryC. albicans morphogenesis pathway

Inhibition of the morphological switch from yeast to hyphal forms and disruption of the extracellular matrix production in biofilms through the modulation of signaling pathways and transcriptional regulators.