Onychomycosis-causing fungal pathogens

Fungal cells causing onychomycosis primarily include dermatophytes such as Trichophyton rubrum and Trichophyton mentagrophytes, which account for the majority of cases (StatPearls, 2023). These pathogens also encompass various yeasts, such as Candida albicans, and non-dermatophyte molds that invade the nail unit, including the nail plate and bed (NIH, 2022). The biological role of these cells in disease involves the secretion of keratinases that degrade nail keratin, facilitating fungal colonization and persistence (PubMed, 2021). Pharmacological intervention targets specific molecular pathways within these cells, most notably the ergosterol biosynthetic pathway and protein synthesis machinery (Journal of Fungi, 2021). Drugs like terbinafine and efinaconazole work by inhibiting enzymes like squalene epoxidase and 14-alpha demethylase, respectively, leading to membrane disruption and cell death (FDA, 2020). Because the nail plate acts as a physical barrier, these fungal cells are often difficult to eradicate, requiring long-term systemic or topical therapy (Mayo Clinic, 2023).

Other names

DermatophytesTrichophyton rubrumTrichophyton mentagrophytesCandida albicansNon-dermatophyte moldsNail fungusTinea unguium pathogens

Antifungal drugs target these cells by inhibiting ergosterol biosynthesis (via squalene epoxidase or 14-alpha demethylase inhibition), disrupting protein synthesis (via leucyl-tRNA synthetase inhibition), or interfering with fungal cell membrane integrity and intracellular transport.