Abstract
Latanoprost has recently been used to treat alopecia as it causes an increase in the capillary density of patients. This work presents for the first time the development of polymeric nanocapsules containing latanoprost for the topical treatment of alopecia. Poly-ε-caprolactone nanocapsules loading latanoprost were developed by nanoprecipitation of the polymer on the surface of drug oily nanodroplets. The method encapsulated 93.9 ± 0.4% of the drug into nanocapsules of 197.8 (± 1.2) nm (PdI = 0.15 ± 0.01). The nanosystem presented a zeta potential equal to − 30.1 ± 1.8 mV and was stable for at least 90 days when stored at 6°C. The colloidal aqueous dispersion was non-irritating, according to the in vitro HET-CAM test. The nanocapsules improved latanoprost accumulation into the hair follicles when topically applied on porcine skin, delivering 30% more drug to these skin structures relative to the control solution (P < 0.05). Also, with a simple manual massage, latanoprost accumulation was increased by twofold (P < 0.05). In conclusion, in addition to being a stable and safe formulation, nanocapsules enhanced latanoprost accumulation into the hair follicles, being a nanosystem with high potential for use as a topical formulation for the treatment of androgenic alopecia.
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Acknowledgments
The authors would also like to thank “Sabugy Agroindustria e Comercio de Alimentos LTDA” for gently providing the porcine ears, as well as Ricardo Ferreira Nunes for his important technical assistance.
Funding
The authors acknowledge the Brazilian funding agency CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) and University of Brasília (Editals DPI/UnB 04/2019 and 03/2020) for financial support, and CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) for providing the grants for ACS Oliveira and PM Oliveira.
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Oliveira, A.C.S., Oliveira, P.M., Cunha-Filho, M. et al. Latanoprost Loaded in Polymeric Nanocapsules for Effective Topical Treatment of Alopecia. AAPS PharmSciTech 21, 305 (2020). https://doi.org/10.1208/s12249-020-01863-1
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DOI: https://doi.org/10.1208/s12249-020-01863-1