POSTECH Researchers Develop ‘Mosaic’ Cellular Reprogramming to Prime Skin for Accelerated Wound Healing

Researchers at POSTECH develop a mosaic cellular reprogramming technique that helps skin "pre-learn" regeneration to accelerate healing and reduce scarring.

By: AXL Media

Published: Apr 9, 2026, 9:41 AM EDT

Source: Information for this report was sourced from EurekAlert!

A Proactive Approach to Tissue Regeneration

Researchers at the Pohang University of Science and Technology (POSTECH) have introduced a transformative method for skin repair that moves beyond traditional post-injury treatments. Published in Nature Communications, the study illustrates how skin tissue can be biologically primed for damage before it occurs. Led by Professor Sekyu Choi and Professor Jong Kyoung Kim, the team showed that preconditioning specific skin cells enables the body to initiate rapid and effective healing immediately upon injury, much like a student preparing in advance for an exam.

The Mechanics of Mosaic Partial Reprogramming

The research centers on a refined version of cellular reprogramming using Yamanaka factors, which typically revert cells to an embryonic state. To avoid the risks of uncontrolled growth and tumor formation associated with full reprogramming, the team adopted a "gentle rewind" strategy. This "mosaic" approach targets only a small fraction of epidermal cells and limits the extent of their reset. This dual-layered caution ensures that the cells do not lose their fundamental identity but instead enter a highly flexible, more youthful state.

Activating Intercellular ‘Pre-Learning’ Pathways

The study found that even without an active injury, the targeted cells began communicating with their neighbors, triggering a systemic shift in the tissue microenvironment. This coordinated response was driven by the activation of key signaling pathways, including PI3K-AKT, EGFR, and HIF-1α, which are essential for growth and adaptation to low-oxygen conditions. In effect, the reprogrammed cells signaled to surrounding normal cells and immune cells that an injury might be imminent, effectively putting the entire tissue on high alert.