Researchers developed a bioengineered hair follicle system by combining epithelial stem cells, dermal papilla cells and a newly identified dermal-derived mesenchymal support cell population. According to the study, inclusion of this third cell type enabled the regenerated follicles to achieve more complete structural organisation and sustained hair cycling. 

When transplanted into mice, the regenerated follicles produced hair shafts that integrated with surrounding tissue and underwent repeated hair growth cycles similar to native follicles. The follicles also formed associated structures including sebaceous glands and attachment tissues important for long-term follicle function. 

The authors suggest the findings address a major limitation in hair follicle bioengineering, where previous regenerated follicles often failed to maintain stable cycling or full tissue integration. Further research will be required to determine scalability, safety and translational potential in human hair loss conditions.