Dexamethasone-Loaded Lipomers: Development, Characterization, and Skin Biodistribution Studies

Area of Science:

• Pharmaceutics
• Nanotechnology
• Dermatology

Background:

• Follicular targeting is crucial for topical drug delivery, offering depot effects and treatment for hair follicle diseases.
• Lipid core ethyl cellulose lipomers present a promising nanocarrier system for enhanced follicular delivery.

Purpose of the Study:

• To develop and characterize dexamethasone-loaded lipomers for follicular targeting.
• To evaluate the in vitro release, skin biodistribution, and anti-inflammatory efficacy of the lipomers.

Main Methods:

• Lipomer formulation and physicochemical characterization (size, polydispersity, Z-potential).
• In vitro drug release studies using Franz diffusion cells.
• Confocal microscopy and immunofluorescence for skin biodistribution analysis.
• In vitro anti-inflammatory assay (TNFα) and cytotoxicity testing.

Main Results:

• Optimized lipomers (115 nm, PDI 0.24, +30 mV) successfully encapsulated dexamethasone.
• Lipomers demonstrated sustained in vitro drug release and significant accumulation in pig skin hair follicles.
• Dexamethasone-loaded lipomers exhibited potent in vitro anti-inflammatory effects and good safety profiles.

Conclusions:

• Dexamethasone-loaded lipid core ethyl cellulose lipomers are effective for follicular targeting and topical delivery.
• This nanoformulation holds significant potential for treating inflammatory hair follicle-related conditions.