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Recent progress on the topical therapy of onychomycosis
Michael R K Alley1, Stephen J Baker, Karl R Beutner
1Anacor Pharmaceuticals, 1060 East Meadow Circle, Palo Alto, CA 94303, USA.
Abstract:
Onychomycosis is a fungal infection of the fingernails and toenails that results in thickening, discoloration, splitting of the nails and lifting of the nail from the nail bed. The disease is caused by dermatophytes and has a high incidence within the general population, especially among older individuals. Present treatment options include both oral and topical drugs, with oral therapies giving better outcomes; however, neither of these treatment options provides high cure rates that are durable. The difficulty in treating onychomycosis results from the deep-seated nature of the infection within the nail unit (nail plate, nail bed and surrounding tissue) and the inability of drugs to effectively reach all sites. Ongoing drug development activities have focused on novel delivery technologies to facilitate penetration of existing antifungal drugs through the nail plate and on the discovery of inherently penetrable antifungals. AN-2690 represents an oxaborole antifungal that is designed to penetrate the nail plate and is showing promising results in clinical trials.
Insights
Onychomycosis, a common fungal nail infection, is difficult to treat due to poor drug penetration. Novel antifungals like AN-2690 show promise for improved nail penetration and durable cure rates.
Area of Science:
- Dermatology
- Mycology
- Medicinal Chemistry
Background:
- Onychomycosis is a prevalent fungal nail infection causing nail damage.
- Current treatments (oral and topical) have limited durable cure rates.
- Treatment challenges stem from the infection's deep location and poor drug penetration.
Purpose of the Study:
- To address the limitations of existing onychomycosis therapies.
- To explore novel drug delivery technologies for enhanced antifungal penetration.
- To evaluate the efficacy of new antifungal agents designed for nail penetration.
Main Methods:
- Investigated the development of novel antifungal agents.
- Focused on technologies facilitating drug penetration through the nail plate.
- Clinical trials were conducted to assess promising candidates like AN-2690.
Main Results:
- AN-2690, an oxaborole antifungal, demonstrated potential for nail plate penetration.
- Promising results were observed in ongoing clinical trials for AN-2690.
- The study highlights progress in developing antifungals with improved pharmacokinetic properties.
Conclusions:
- Novel antifungal development is crucial for improving onychomycosis treatment outcomes.
- Targeting nail penetration is a key strategy for effective onychomycosis therapy.
- AN-2690 represents a promising advancement in treating fungal nail infections.
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