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.
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September 2017 in “Cancer Research” This study reports that hair follicles can mobilize ectopic progenitors for regeneration to repair damage from ionizing radiation. Augmenting WNT signaling enhanced this regenerative process and prevented radiation- and chemotherapy-induced hair loss, highlighting a potential approach to manage alopecia during cancer treatment.
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October 2020 in “Research Square (Research Square)” This study found that abnormal Wnt signalling in stem cells may contribute to blackhead formation in acne by inhibiting cell differentiation and causing cell accumulation in the junctional zone.
In this study, Smad4 deletion in satellite cells hindered skeletal muscle regeneration in adult mice and did not enhance regeneration in aged mice, indicating Smad4's crucial role in muscle repair.
This study found that Smad4 is crucial for satellite cell amplification during skeletal muscle regeneration, with aged cells exhibiting less Smad4 and reduced regenerative capability in mice.
