January 2011 in “Xibei nongye xuebao” This study found that the K14 promoter exhibited higher activity in skin cell lines compared to other cell lines, while both K14 and K5 promoters were active in all tested cell lines.
April 2010 in “The journal of immunology/The Journal of immunology” This study found that deleting the FoxN1 gene in mice disrupted the 3D thymic epithelial structure and led to 2D epithelial cysts, revealing its crucial role in thymus organization but not causing athymia.
December 2025 in “The Journal of Cell Biology” This study found that keratin 15 lacks the ability to sequester YAP1 in keratinocytes effectively, unlike keratin 14, and suggests that a higher K15:K14 ratio may promote a progenitor state and inhibit differentiation in epidermal keratinocytes.
133 citations
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June 1993 in “Molecular and Cellular Biology” This study found that a truncated region of the K5 promoter directs expression in stratified epithelia, particularly in epidermis, hair follicles, and tongue, potentially involving specific keratinocyte nuclear proteins in regulation.
79 citations
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June 1993 in “Molecular and Cellular Biology” This study found that as few as 90 base pairs of the K5 promoter directed keratinocyte-preferred expression in stratified epithelia, especially in epidermis, hair follicles, and tongue, showing cell type specificity.