Mesenchymal Stem Cell-Inspired Microneedle Platform for NIR-responsive Immunomodulation and Accelerated Chronic Wound Healing.

ABSTRACT: Chronic diabetic wounds present substantial clinical challenges owing to sustained inflammation, compromised vascularization, and inadequate retention of therapeutic medications. Accordingly, motivated by mesenchymal stem cells (MSCs) that actively secrete bioactive exosomes in response to stimuli from the tissue microenvironment, a biomimetic microneedle (MN) platform (MSCi@MN) is created to address these challenges. The MSCi@MN exhibits a dual-compartment structure composed of MSC-derived extracellular nanovesicles (NV) conjugated with polydeoxyribonucleotide (PDRN; DNA), referred to as NV-DNA, encapsulated within dissolvable MN tips, and photothermal-responsive MXene nanoparticles (MX) incorporated into the base layer for targeted near-infrared (NIR)-activated drug delivery. Upon NIR ir

SUBMITTER: Moon CH 

PROVIDER: S-EPMC12921356 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature