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In this study, researchers used a human skin organoid model to show that solar UV exposure damages hair follicles and skin, while exosomes from mesenchymal stem cells reduced inflammation and supported hair follicle regeneration.

This study used a 3D simulation to show that human hair provides varying levels of UV protection depending on head orientation and hair alignment, highlighting hair's role in scalp UV protection, especially for those with alopecia.

This study found that inhibiting the ATR kinase with VE-822 impairs DNA repair capability in quiescent human keratinocytes exposed to solar-simulated UV radiation, suggesting ATR's critical role in facilitating effective DNA damage repair and cellular recovery under UV stress conditions.

This study found that in mouse melanocytes, the cytoplasmic dynein complex component Dynlt3 is necessary for proper melanosome transport, acidity regulation, and effective transfer to keratinocytes, linking it to skin pigmentation processes.

In this study, UVB irradiation increased mast cell degranulation only when skin was innervated, suggesting that the interaction between mast cells and nerve fibres may exacerbate solar elastosis by promoting dysfunctional dermal elastic fiber accumulation, but further research is needed for confirmation.