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This review discusses how ionizing radiation causes skin damage by inducing cellular senescence in keratinocytes, which secrete inflammatory mediators, recruiting immune cells and exacerbating inflammation, impacting the skin barrier function and healing.

This study explored the effects of red ginseng-derived components on aging skin cells and found they do not have senolytic properties but can alleviate signs of cellular aging and improve skin cell function by reducing senescence markers and inflammation.

This article reviews the functions and locations of skin stem cells and their role in regeneration and differentiation, relating age-associated skin changes to decreased stem cell functionality; it reports no new experimental findings.

In this study, Wang et al. (2022) found that in patients with cutaneous lupus erythematosus, chronic lesions contained more senescent progenitor cells, marked by p16 and p21, than subacute lesions, suggesting a link between disease chronicity and cellular senescence.

This study found that DNA-damaged hair follicle stem cells in mouse models do not show typical senescent markers but are dynamically expelled to maintain tissue health and prevent hair loss.

In this study on mice, elevated IGF-1 levels in the skin were linked to premature aging of hair follicles, but interventions like reducing IGF-1 or using senolytic treatments helped restore stem cell health and counteract aging effects.

This study reviews the role of skin stem cells in aging and explores how organoids, as opposed to traditional methods, can advance research into aging skin and regenerative therapies.

In this study, sandalore was found to activate OR2AT4, which inhibits senescent cell traits and restores proliferation in human keratinocytes, suggesting potential anti-aging applications.

Reactive lipids from aging cells change the extracellular matrix, affecting cell function and inflammation.

N,N-Dimethylglycine sodium salt may improve skin health and treat hair loss.

In this study, Iris germanica L. rhizome-derived exosomes were found to reduce oxidative stress, enhance antioxidant enzyme transcription, and restore cellular function in human epidermal keratinocytes, suggesting potential protective effects against oxidative-stress-induced skin damage.

This study found that targeting IL-6, IL-1, and CCR6 signaling pathways may effectively reduce irradiation-induced alopecia and dermatitis in radiotherapy patients.

In this study, researchers discovered that the HrasG12V oncogenic mutation in murine skin epithelial cells initially promotes progenitor cell renewal but later leads to a balanced differentiation, stabilizing clone growth.

This study found that inhibiting PI3 kinase in epidermal stem cells reduces YBX1 phosphorylation, thereby decreasing cellular senescence and enhancing wound healing and regeneration in adult-derived skin models.

This study found that α-melanocyte-stimulating hormone may modulate inflammation in skin connective tissue by inhibiting proinflammatory effects in fibroblasts.

This study found that inhibiting NF-κB Essential Modulator (NEMO) in senescent murine dermal fibroblasts successfully reduced key factors associated with the senescence associated secretory phenotype (SASP), highlighting its potential as a therapeutic target for aging-related diseases.

HA-iMSC-EVs can improve skin aging by boosting cell growth and restoring collagen and elastin.

This review examines the complexities of age-related skin healing and discusses how translating findings from model organisms to humans could enhance understanding and treatment of impaired regeneration in aging populations, but it reports no new clinical results.

This study found that "early" transit amplifying cells, marked by CD271, are the first keratinocyte stem cell progenitors with distinct features, playing a significant role in early epidermal differentiation and regeneration.

This study found that PTEN regulates the number and genomic stability of hair follicle stem cells in the skin, with its deficiency leading to increased stem cell accumulation and senescence through interactions with BMAL1 and BMI-1.

This review examines how mesenchymal stem cells and their derivatives may enhance skin regeneration and rejuvenation, but it reports no new clinical results; the authors suggest iPSC-derived MSCs hold promise for future therapies.

The study identified increased IL-24 expression in keratinocytes and fibroblasts exposed to particulate matter, contributing to skin aging by promoting conditions similar to age-related changes such as increased MMP1 expression and decreased type I collagen production.

This review discusses recent advancements in skin epigenetics, focusing on how epigenetic mechanisms regulate gene expression during normal skin function and their dysregulation in conditions like skin disorders and cancer, but reports no new clinical results.

This study examined dermal papilla cells from hair follicles, finding that gene expression changes linked to wound healing and stem cell activity align with hair follicle regression, which could inform strategies for hair growth and skin rejuvenation.

In this study, researchers developed a delivery system using a deep eutectic solvent to improve hydroxytyrosol absorption for hair regrowth, achieving over threefold greater skin penetration compared to aqueous solutions and demonstrating its effectiveness and biocompatibility in hair regrowth and ROS-scavenging tests.

In this study, araliadiol, a plant-derived compound, exhibited senomorphic effects in three dermal fibroblast senescence models, suggesting its potential as a topical treatment to mitigate skin aging by reducing certain senescence-related markers and increasing procollagen type I content.

This study found that dermal papilla cell-conditioned medium can protect against UV-induced skin aging in a mouse model by modulating ferroptosis pathways, highlighting its potential for treating oxidative stress-related skin conditions.

This study shows that inhibiting anti-apoptotic proteins BCL-W and BCL-XL can specifically induce apoptosis in senescent cells, suggesting a potential strategy for treating age-related pathologies.

This study found that in androgenetic alopecia mice, MNX@Arg-CLAVs, a novel nanovesicle platform containing minoxidil and conjugated linoleic acid, enhanced hair regeneration and reduced hair follicle aging more effectively and with less irritation compared to traditional minoxidil tincture.

At a workshop highlighted during the 2025 ESPCR meeting, researchers discussed the challenges and variability in culturing skin-related cells, identifying key factors such as media composition and species differences that affect experimental reproducibility, and emphasized the importance of transparent practices to advance pigment cell research.