An Innovative Fluid Dynamic System to Model Inflammation in Human Skin Explants

Area of Science:

• Dermatology
• Biotechnology
• Pharmacology

Background:

• The skin is a primary route for drug administration, necessitating effective transdermal formulations.
• Current in vitro skin models lack the complexity of living skin, making excised human skin the gold standard despite its limited lifespan.
• Developing advanced in vitro models is crucial for preclinical drug and cosmetic testing.

Purpose of the Study:

• To develop an innovative bioreactor for preserving human skin explants in vitro.
• To establish a reliable in vitro model of human skin inflammation.
• To evaluate the bioreactor's utility in simulating inflammatory responses and testing therapeutic agents.

Main Methods:

• Utilized an innovative bioreactor to maintain structural and functional integrity of human skin explants for up to 72 hours.
• Established an in vitro inflammatory model using dithranol (contact dermatitis) and substance P (neurogenic inflammation) as stimuli.
• Analyzed inflammatory markers including vasodilation, immune cell infiltration (macrophages, mast cells), and cytokine secretion.

Main Results:

• The bioreactor successfully preserved human skin explants in vitro for 72 hours.
• The developed in vitro system accurately reproduced key inflammatory events observed in vivo.
• Demonstrated increased vasodilation, immune cell presence, and cytokine secretion in response to inflammatory stimuli.

Conclusions:

• The bioreactor-based system provides a reliable method for simulating human skin inflammation in vitro.
• This advanced model is a promising tool for preclinical evaluation of drugs and cosmetics.
• The system enhances the study of transdermal drug delivery and skin barrier function.