Fungal cell membrane lipid bilayer

The fungal cell membrane lipid bilayer is a fundamental structural component that maintains the integrity and internal environment of fungal cells [1]. Composed of a phospholipid matrix interspersed with proteins and sterols, its most distinctive feature is the presence of ergosterol, which regulates membrane fluidity and permeability [2]. This bilayer serves as a critical therapeutic target for polyene antifungals, which exploit the presence of ergosterol to distinguish fungal cells from host mammalian cells [3]. Drugs like Amphotericin B bind to ergosterol, aggregating to form aqueous pores that allow the uncontrolled efflux of essential ions such as potassium, leading to cell lysis [4]. Additionally, research suggests that these drugs may also act by sequestering ergosterol into surface aggregates, thereby disrupting membrane-associated protein functions [3]. Despite its efficacy, the lipid bilayer presents a challenge for drug design due to the potential for cross-reactivity with human cholesterol, which can result in significant clinical toxicities, particularly renal impairment [5]. Therapeutic strategies often involve lipid-based formulations to reduce host toxicity while maintaining antifungal activity against the membrane [5].

Other names

Fungal plasma membraneFungal cytoplasmic membraneFungal cell membrane

Direct binding to and sequestration of ergosterol within the lipid bilayer, leading to the formation of trans-membrane pores, leakage of intracellular contents, and oxidative damage [3, 4].