Journal
INTERNATIONAL JOURNAL OF PHARMACEUTICS
Volume 597, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ijpharm.2021.120342
Keywords
Electrospraying; Microcapsules; Probiotics; Mucoadhesion; Alginate; Chitosan
Categories
Funding
- European Union's Erasmus + programme
- Doctoral School of Food Science, Szent Istvan University, Hungary
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The study focused on the importance of prolonged gastrointestinal retention for probiotics delivery. Different formulations of alginate microparticles were prepared using electrospray technique, with chitosan-coated microparticles showing the highest mucoadhesive property. A novel in vitro wash-off mucoadhesion test setup was successfully validated for evaluating the performance of these probiotic formulations.
Besides viability protection, a sufficiently prolonged gastrointestinal retention of probiotics has emerged as critically important in improving the functional effectiveness of gastrointestinal delivery of these microorganisms. In this work, we formulated pure, resistant starch-reinforced and chitosan-coated alginate microparticles using an electrospray technique and evaluated their performance as mucoadhesive probiotic formulations for gastrointestinal delivery. In addition, we designed and successfully validated a novel experimental set-up of in vitro wash-off mucoadhesion test, using a portable and low-cost USB microscope for fluorescence imaging. In our test, pure chitosan microparticles (positive control) exhibited the greatest mucoadhesive property, whereas the alginate-resistant starch ones (negative control) were the least retentive on a gastric mucosa. These electrosprayed formulations were spherically shaped, with a size range of 30-600 mu m (60-1300 mu m with chitosan coating). Moreover, model probiotic Lactobacillus plantarum loaded in alginate-starch formulations was better protected against simulated gastric conditions than in alginate ones, but not better than in the chitosan-coated ones.
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