Preparation of microspheres by alginate purified from Sargassum horneri and study of pH-responsive behavior and drug release.
Int J Biol Macromol 2022;
202:681-690. [PMID:
35122802 DOI:
10.1016/j.ijbiomac.2022.01.171]
[Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/23/2022] [Accepted: 01/28/2022] [Indexed: 11/24/2022]
Abstract
Alginate is a biopolymer used in numerous biomedical applications. The current work describes the purification of alginate from Sargassum horneri and method optimization for formulating drug-loaded microparticles by water-in-oil emulsification/internal gelation. Molecular weights of S. horneri alginate were ranging 50-70 kDa. Among 16 method optimizations, the F4 method was selected for further studies based on shape descriptor parameters which indicated, 0.24 ± 0.01 circularity, 0.80 ± 0.11 roundness, 1.27 ± 0.20 aspect ratio between long and short axis, and less aggregation in PBS. Processing parameters of the F4 method were; CaCO3/alginate ratio of 20/1 (w/w), 5% span 80 in oil (v/v), water/oil phase ratio of 1/20 (v/v), and 1000 rpm emulsification speed. Hollow pores were visible on the surface of dehydrated F4 microparticles. F4 microparticles indicated 41.84 ± 2.93 and 45.86 ± 1.65% encapsulation efficiencies for phloroglucinol (F4P) and indomethacin (F4I) with 32.69 ± 1.35 and 31.69 ± 1.98% loading capacities. These microparticles were found to be desirable for extending drug release over short periods (0-3 days) under pH 2.0-7.4. F4P and F4I were effective in suppressing intracellular reactive oxygen species in FD exposed HaCaT cells while increasing cell viability over 24 - 48 h duration.
Collapse