Injectable microgel-hydrogel composites for prolonged small-molecule drug delivery.

Abstract:

:The design and application of soft nanocomposite injectable hydrogels containing entrapped microgels for small-molecule drug delivery is demonstrated. Copolymer microgels based on N-isopropylacrylamide and acrylic acid were synthesized that exhibited both ionic and hydrophobic affinity for binding to bupivacaine, a cationic local anesthetic used as a model drug. Microgels were subsequently immobilized within an in situ-gelling hydrogel network cross-linked via hydrazide-aldehyde chemistry to generate hydrogel-microgel soft nanocomposites. Drug release could be sustained for up to 60 days from these nanocomposite hydrogels, significantly longer than that achievable using the constituent hydrogel or microgels alone (<1 week). Drug release kinetics could be readily tuned by varying the affinity of the microgel and hydrogel phases for drug-polymer interactions and the network density of the hydrogel phase.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Sivakumaran D,Maitland D,Hoare T

doi

10.1021/bm201170h

subject

Has Abstract

pub_date

2011-11-14 00:00:00

pages

4112-20

issue

11

eissn

1525-7797

issn

1526-4602

journal_volume

12

pub_type

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