Alginate-Based Delivery Systems for Bevacizumab Local Therapy: In Vitro Structural Features and Release Properties.

Abstract:

:Alginate-based polyelectrolyte complexes (PECs) and hydrogel were engineered as platforms for local bevacizumab (BVZ) therapy. This study provides deep comprehension on the microstructures of such systems, and their correlation with drug-release patterns. PECs and hydrogel were characterized using Fourier transform infrared spectroscopy, small-angle X-ray scattering, scanning electron microscopy, atomic force microscopy, and porosimetry. Structural investigations indicated that PECs are formed by supramolecular interactions, resulting in physically cross-linked polymer networks, whereas the BVZ-loaded hydrogel has a more compact and rigid structure, promoting better entrapment of BVZ. PECs and hydrogel were able to control the BVZ release for 4 and 8 days, respectively. Their release profiles correlated best with the Higuchi and Korsmeyer-Peppas models, respectively, indicating drug diffusion as the limiting step for drug release. Furthermore, BVZ remained biologically active in vitro after its incorporation into the hydrogel system. Together, these studies confirm that PECs and hydrogel exhibit different porous structures and physicochemical properties, making them promising platforms that allow the modulation of BVZ release meeting different requirements.

journal_name

J Pharm Sci

authors

Ferreira NN,Caetano BL,Boni FI,Sousa F,Magnani M,Sarmento B,Ferreira Cury BS,Daflon Gremião MP

doi

10.1016/j.xphs.2018.11.038

subject

Has Abstract

pub_date

2019-04-01 00:00:00

pages

1559-1568

issue

4

eissn

0022-3549

issn

1520-6017

pii

S0022-3549(18)30786-X

journal_volume

108

pub_type

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