Modulation of the fate of zein nanoparticles by their coating with a Gantrez® AN-thiamine polymer conjugate

• Main Authors: Laura Inchaurraga (Author), Ana L. Martínez-López (Author), Muthanna Abdulkarim (Author), Mark Gumbleton (Author), Gemma Quincoces (Author), Ivan Peñuelas (Author), Nekane Martin-Arbella (Author), Juan M. Irache (Author)
• Format: Book
• Published: Elsevier, 2019-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

The aim of this work was to evaluate the mucus-permeating properties of nanocarriers using zein nanoparticles (NPZ) coated with a Gantrez® AN-thiamine conjugate (GT). NPZ were coated by incubation at different GT-to-zein ratios: 2.5% coating with GT (GT-NPZ1), 5% (GT-NPZ2) and 10% (GT-NPZ3). During the process, the GT conjugate formed a polymer layer around the surface of zein nanoparticles. For GT-NPZ2, the thickness of this corona was estimated between 15 and 20 nm. These nanocarriers displayed a more negative zeta potential than uncoated NPZ. The diffusivity of nanoparticles was evaluated in pig intestinal mucus by multiple particle tracking analysis. GT-NPZ2 displayed a 28-fold higher diffusion coefficient within the mucus layer than NPZ particles. These results align with in vivo biodistribution studies in which NPZ displayed a localisation restricted to the mucus layer, whereas GT-NPZ2 were capable of reaching the intestinal epithelium. The gastro-intestinal transit of mucoadhesive (NPZ) and mucus-permeating nanoparticles (GT-NPZ2) was also found to be different. Thus, mucoadhesive nanoparticles displayed a significant accumulation in the stomach of animals, whereas mucus-penetrating nanoparticles appeared to exit the stomach more rapidly to access the small intestine of animals. Keywords: Zein, Nanoparticles, Thiamine, Oral delivery, Coating, Mucus permeating

Item Description

2590-1567
10.1016/j.ijpx.2019.100006