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Dermal papillae cells, important for hair growth, come from multiple cell lines and can be formed by skin cells, regardless of their origin or hair cycle phase. These cells rarely divide, but their ability to shape tissue may contribute to their efficiency in inducing hair growth.

The research found a way to identify and study skin cells with stem cell traits, revealing they behave differently in culture and questioning current stemness assessment methods.

Only one K16 gene on chromosome 17 makes a functional keratin protein.

Trichohyalin is also found in the outer layers of normal human skin.

The research cloned keratin 7 genes from humans, mice, and marsupials, found similarities between human and mouse genes, and discovered new areas of K7 expression in mice.