Biodegradable STAR Particles Enhance Drug Delivery to Skin by Up to 37-Fold

Researchers at Georgia Tech have developed biodegradable STAR particles that enhance drug delivery through the skin, as reported in the journal Advanced Healthcare Materials. These particles, made from water-soluble poly(vinyl alcohol), enzyme-degradable cellulose acetate, and hydrolyzable polylactic acid, can painlessly puncture the skin, significantly increasing permeability for drug absorption.

STAR Particles and Their Mechanism

The STAR particles utilize microscopic needles that create openings in the skin's outer barrier, allowing for more effective drug delivery. In ex vivo studies on porcine skin, the use of these particles resulted in up to a 37-fold increase in intradermal drug delivery, depending on the drug type and the material used. The study evaluated three model drugs: tacrolimus with PVA STAR particles, methotrexate with CA STAR particles, and copper tripeptide-1 with PLA STAR particles.

Environmental and Safety Considerations

The development of biodegradable STAR particles addresses potential environmental and safety concerns associated with previous non-biodegradable materials. The new formulation aims to provide an effective method for delivering medications directly to the skin while minimizing the risk of environmental impact. This innovation could lead to improved treatments for skin conditions like eczema and psoriasis, reducing side effects associated with systemic drug delivery. The findings highlight the potential of these biodegradable particles in enhancing therapeutic outcomes while being mindful of environmental sustainability.