Anionic Polysaccharide Nanoparticles for Gastrointestinal Delivery of Polyphenol Used in Bone Protection Under Weightlessness

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2024 Jan 11

PMID 38202827

Authors

Li Kang

Qiao Li

Yonghui Jing

Feiyan Ren

Erzhuo Li

Xiangyin Zeng

Yier Xu

Dongwei Wang

Qiang Wang

GuiCai Sun

Lijun Wei

Yan Diao

Affiliations

Soon will be listed here.

Abstract

polysaccharides used in polyphenol encapsulation and delivery under weightlessness are rarely reported. In this study, an anionic polysaccharide fragment named AAP Iα with a molecular weight of 133.304 kDa was isolated and purified to construct a polyphenol encapsulation system. Nanoparticles named NPs-PP loaded with a rough surface for polyphenol (PP) delivery were fabricated by AAP Iα and ε-poly-L-lysine (ε-PL). SEM and the DLS tracking method were used to observe continuous changes in AAP Iα, ε-PL and PP on the nanoparticles' rough surface assembly, as well as the dispersion and stability. Hydrophilic, monodisperse and highly negative charged nanoparticles can be formed at AAP Iα 0.8 mg/mL, ε-PL 20 μg/mL and PP 80 μg/mL. FT-IR was used to determine their electrostatic interactions. Release kinetic studies showed that nanoparticles had an ideal gastrointestinal delivery effect. NPs-PP loaded were assembled through electrostatic interactions between polyelectrolytes after hydrogen bonding formation in PP-AAP Iα and PP-ε-PL, respectively. Colon adhesion properties and PP delivery in vivo of nanoparticles showed that NPs-PP loaded had high adhesion efficiency to the colonic mucosa under simulated microgravity and could enhance PP bioavailability. These results suggest that AAP Iα can be used in PP encapsulation and delivery under microgravity in astronaut food additives.

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