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This article describes the structure and components of hair cuticle cells and their intercellular junctions but reports no new clinical results.

This study found that partial protein extraction from keratinized tissues, such as hair and nails, reveals protein patterns distinct from whole protein extracts, including the presence of ubiquitin.

This review reports on the use of nails as an alternative biological matrix to hair for assessing long-term drug consumption, emphasizing that while there are clear differences between nail and hair samples, more standardized research is necessary for definitive conclusions.

This study successfully grew and maintained human hair follicles in vitro, noting that TGF-β1 negatively affects growth, while EGF replicates hair-removal effects seen in animals.

In this study, insulin-like growth factor-1 did not impact hair follicle elongation in rat pelage hair follicles, while transforming growth factor-beta 1 inhibited both elongation and thymidine uptake.