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Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
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Mixed Polymeric Micelles for Rapamycin Skin Delivery.
Guillaume Le Guyader1,2, Bernard Do1,3, Ivo B Rietveld4,5
1Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Henri Mondor, F-94010 Créteil, France.
Pharmaceutics
|March 26, 2022
Summary
This study optimized topical rapamycin delivery for facial angiofibromas using mixed polymeric micelles. The new hydrogel formulation enhances drug stability and skin bioavailability for tuberous sclerosis complex treatment.
Area of Science:
- Dermatology
- Pharmaceutics
- Nanotechnology
Background:
- Facial angiofibromas (FA) are a key symptom of tuberous sclerosis complex (TSC).
- Topical rapamycin shows promise for treating FA, but effective delivery remains a challenge.
- Polymeric micelles, particularly those with d-α-tocopherol polyethylene glycol 1000 succinate (TPGS), offer improved skin bioavailability compared to traditional ointments.
Purpose of the Study:
- To investigate the impact of mixed polymeric micelles (TPGS and poloxamer) on rapamycin's behavior.
- To develop and optimize a rapamycin-loaded hydrogel formulation for enhanced FA treatment.
- To evaluate the stability and skin bioavailability of the optimized formulation.
Main Methods:
- Formulation of mixed polymeric micelles combining TPGS and poloxamer P123 with rapamycin.
- Evaluation of rapamycin's solubility and stability within the micelles.
- Assessment of skin bioavailability and biodistribution of the rapamycin formulation on human skin.
- Stability testing of the optimized hydrogel formulation at controlled temperatures.
Main Results:
- TPGS significantly enhanced rapamycin's solubility and stability through micellar inclusion.
- Poloxamer P123 demonstrated a more pronounced effect on improving skin bioavailability.
- An optimized 0.1% rapamycin mixed-micelle hydrogel formulation was successfully developed.
- The optimized hydrogel showed good stability for up to 3 months at 2-8 °C.
- The hydrogel formulation exhibited superior skin biodistribution compared to hydroalcoholic gels.
Conclusions:
- Mixed polymeric micelles effectively improve the physicochemical properties and skin delivery of topical rapamycin.
- The developed rapamycin-loaded hydrogel is a stable and effective system for treating facial angiofibromas in TSC patients.
- This formulation represents a significant advancement in topical drug delivery for dermatological conditions.
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