Inside the Lab: Why Researchers Use Ex Vivo Human Skin Explants

When people hear the words “skin research,” they often imagine petri dishes, microscopes, and complicated scientific terms. But at its heart, skin research is about something very simple: understanding how human skin works so we can develop better treatments to help people with skin diseases.

One of the most powerful tools that researchers use today involves using ex vivo human skin explants. While the term may sound technical, the idea behind it is straightforward, and notably relies on the generosity of research volunteers.

What Does “Ex Vivo” Mean?

“Ex vivo” simply means that tissue is studied outside the body, in a carefully controlled laboratory environment.

In skin research, this usually involves small samples of donated human skin, often left over from routine surgeries or collected through ethical tissue research programs. These samples are kept alive for a short period of time in specialised culture conditions so researchers can study how real human skin responds to inflammation, irritation, or potential new treatments.

Why Not Just Use Cell Cultures or Animal Models?

For many years, researchers relied heavily on isolated skin cells grown in dishes or on animal models. While these approaches are still useful, they don’t fully replicate the complexity or the dynamic nature of human skin.

Human skin is made up of multiple layers, immune cells, structural proteins, blood vessel networks, and signalling molecules that all interact with each other. When you isolate one cell type, you lose that complexity.

Ex vivo human skin explants preserve:

• The natural layers of the skin
• Immune cells within the tissue
• Structural integrity and barrier function
• Real human biological responses
• Measure inflammation levels
• Assess barrier repair
• Study immune responses
• Evaluate potential safety signals
• Improve the understanding of skin diseases
• Support the development of new and better therapies
• Reduce reliance on animal testing
• Accelerate safer treatments reaching patients

This makes them one of the most realistic ways to study how treatments may behave in people, before moving into human clinical trials.

How This Helps Develop New Treatments

Many common and chronic skin conditions, such as eczema, psoriasis, and other inflammatory skin disease, involve complex immune and barrier dysfunction. To develop safer and more effective therapies, researchers need to assess how treatments affect real human tissue.

With skin explants, scientists can:

This helps to identify promising treatments earlier and reduces the likelihood of failure later in the drug development process.

What This Means for Volunteers

None of this research would be possible without research volunteers.

By donating skin samples through ethically approved research programs, volunteers directly contribute to advancing treatments for inflammatory and chronic skin conditions. Donated tissue is handled with the highest standards of consent, privacy, and care. Every sample is treated with respect and used responsibly to generate meaningful scientific insight.

Your participation could help:

Why Human Tissue Matters

There is simply no substitute for studying real human biology. While laboratory models are important, human tissue provides the most relevant insight into how a therapy might truly perform in a patient group.

Ex vivo skin explant research bridges the gap between early laboratory experiments and clinical trials, helping researchers make smarter, safer decisions before treatments are tested in patients.