Fosfluconazole

Fosfluconazole (International Nonproprietary Name or INN) is a distinct water-soluble phosphate prodrug derivative of fluconazole. Fluconazole itself is a triazole antifungal agent utilized for the therapeutic intervention and prophylaxis of both superficial and more invasive systemic fungal infections. The conversion of fosfluconazole to its active counterpart, fluconazole, is mediated by the process of dephosphorylation, enabled by the enzyme phosphatase.

Fosfluconazole structure

Chemical Composition

• Prodrug Nature: Fosfluconazole boasts a phosphate ester bond, rendering it a prodrug. This means it undergoes biotransformation within the body to yield its active form, fluconazole.
• Solubility: It's characteristic water-soluble property aids in its pharmacokinetic profile, potentially influencing absorption, distribution, metabolism, and excretion.

Mechanism of Activation

The activation of fosfluconazole, transforming it into its active form, fluconazole, involves a specific enzymatic process:

• Phosphatase Activity: The enzyme, phosphatase, plays a pivotal role in the hydrolysis of the phosphate ester bond present in fosfluconazole.
• Dephosphorylation: This enzymatic process, known as dephosphorylation, is responsible for cleaving a phosphate group from the prodrug. The hydrolysis of phosphoric acid monoesters results in the generation of a phosphate ion alongside a molecule that possesses a free hydroxyl group. This action subsequently releases fluconazole, ready to exhibit its antifungal activity.

Therapeutic Use

• Antifungal Activity: As a precursor to fluconazole, fosfluconazole shares its therapeutic indications. Once activated, the compound is employed in the management and prevention of various fungal infections.
• Infections Treated: Fosfluconazole is effective against both superficial infections, such as those affecting the skin and nails, as well as systemic infections that can affect internal organs.

Summary

Fosfluconazole stands out as a uniquely designed prodrug, optimized for improved solubility and subsequent metabolic conversion to the well-regarded antifungal agent, fluconazole. Through the enzymatic action of phosphatase, fosfluconazole undergoes dephosphorylation, ensuring the timely release of fluconazole to combat fungal pathogens.

• Dailymed label info on Fosfluconazole
• FDA Fosfluconazole

Fosfluconazole Resources
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