Wound-healing biodegradable microparticles: an investigation.

Wound healing is a complex process that may result in healthy tissue regeneration, but problematic chronic wounds exhibit fibrosis and persistent inflammation. To improve wound outcomes, the application of pro-proliferative polymers as bioresorbable particles was investigated for the first time. The surface of bioresorbable poly(D,L-lactic acid) (PLA) microparticles is decorated with a pro- and anti-proliferative polymer that adheres to the surface for a minimum of 21 days.

Leveraging novel innovative thermoresponsive polymers in microneedles for targeted intradermal deposition.

Microneedles have garnered considerable attention over the years as a versatile pharmaceutical platform that could be leveraged to deliver drugs into and across the skin. In the current work, poly (N-isopropylacrylamide) (PNIPAm) is synthesized and characterized as a novel material for the development of a physiologically responsive microneedle-based drug delivery system. Typically, this polymer transitions reversibly between a swell state at lower temperatures and a more hydrophobic state at higher temperatures, enabling precise drug release.

Microneedle-Mediated Permeation Enhancement of Chlorhexidine Digluconate: Mechanistic Insights Through Imaging Mass Spectrometry.

Purpose: Chlorhexidine digluconate (CHG) is a first-line antiseptic agent typically applied to the skin as a topical solution prior to surgery due to its efficacy and safety profile. However, the physiochemical properties of CHG limits its cutaneous permeation, preventing it from reaching potentially pathogenic bacteria residing within deeper skin layers. Thus, the utility of a solid oscillating microneedle system, Dermapen®, and a CHG-hydroxyethylcellulose (HEC) gel were investigated to improve the intradermal delivery of CHG.

Development and validation of simple and sensitive HPLC-UV method for ethambutol hydrochloride detection following transdermal application.

A new high-performance liquid chromatographic method coupled with UV detection (HPLC-UV) to quantify ethambutol (ETH) post permeation studies following microneedle administration has been developed. This method involves the derivatization of ETH with phenethyl isocyanate (PEIC) at room temperature for 90 min. The separation of the derivative was performed using a C18 column that utilised a mobile phase consisting of 25 mM sodium dihydrogen phosphate buffer (with 1% v/v triethylamine, pH 3.