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Researchers identify miRNAs that may promote hair regrowth

 


Researchers at North Carolina State University have identified microRNAs (miRNAs) that may promote hair regrowth. This miRNA-miR-218-5p- plays an important role in the regulation of pathways involved in follicle regeneration and may be a candidate for future drug development.

Hair growth depends on the health of the dermal papilla (DP) cells that regulate the growth cycle of the hair follicle. Current treatments for hair loss can be costly and ineffective, from invasive surgery to chemical treatments that do not produce the desired results. According to recent hair loss research, when hair loss occurs, the hair follicles do not disappear but only contract. If DP cells were to be recruited at those places, the idea would go and the follicles might recover.

Ke Cheng, Randall B. Terry, Jr. The research team, led by, is a prominent professor of regenerative medicine at the North Carolina State Veterinary University and a professor of biomedical engineering at North Carolina and UNC in cultured DP cells only (2D) and 3D spheroid environments. Spheroids are three-dimensional cell structures that effectively replicate the natural microenvironment of cells; Cheng is a mouse model of hair regeneration, treated with 2D cultured DP cells in keratin and 3D spheroidal DP cells. Saw how fast mouse hair regenerates scaffolding, and commercial hair loss treatment minoxidil. In a 20-day study, mice treated with 3D DP cells recovered 90% of their hair in 15 days.

3D cells in keratin scaffolds worked best because spheroids mimic the microenvironment of the hair and keratin scaffolds act as anchors and keep them where they are needed. However, because we were interested in how DP cells control the growth process of follicles, we looked at exosomes, specifically exosome miRNAs, from their microenvironment. “

Ke Cheng, Randall B. Terry, Jr. Distinguished Professor of Regenerative Medicine at the North Carolina State Veterinary University and Professor of Biomedical Engineering, North Carolina/UNC

Exosomes are small sacs secreted by cells that play an important role in cell-to-cell communication. These sacs contain miRNAs.

MiRNAs are small molecules that regulate gene expression. Cheng and his team measured exosome miRNAs derived from both 3D and 2D DP cells. In 3D DP cell-derived exosomes, we identified miR-218-5p, a miRNA that enhances the molecular pathways that promote hair follicle growth. They found that increasing miR-218-5p promotes hair follicle growth, while inhibiting it causes loss of follicular function.

“Cell therapy with 3D cells may be an effective treatment for alopecia, but these cells need to grow, expand, store, and inject into the area,” Cheng said. say. “On the other hand, MiRNAs are available in small molecule-based drugs, so they could potentially create creams and lotions with similar effects that are less problematic. Future studies will use only this miRNA. Focus on promoting hair growth.”

Source:

See journal:

Hu, S. , other Skin exosomes containing (2020) miR-218-5p promote hair regrowth by regulating β-catenin signaling.. Scientific progress. doi.org/10.1126/sciadv.aba1685..

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