Journal
AMERICAN JOURNAL OF PATHOLOGY
Volume 190, Issue 7, Pages 1356-1369Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ajpath.2020.03.007
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Funding
- LEO Foundation [LF-OC-19-000256]
- National Cancer Institute (NCI) HTAN Initiative grant [1U2CCA233262-01]
- LEO Foundation [LF-OC-19-000256] Funding Source: researchfish
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Long considered both physiologic and inevitable, skin aging is a degenerative phenomenon whereby both intrinsic and environmental factors conspire to produce an authentic disease. The consequences of this disorder are many and varied, ranging from atrophy and fragility to defective repair to deficient immunity and vulnerability to certain infections. The pathobiologic basis for skin aging remains poorly understood. At a cellular level, stem cell dysfunction and attrition appear to be key events, and both genetic and epigenetic factors are involved in a complex interplay that over time results in deterioration of our main protective interface with the external environment. Past and current understanding of the cellular and molecular intricacies of skin aging provide a foundation for future approaches designed to thwart the aging phenotype. Herein, the authors provide a review of current insights into skin aging, including the mechanisms of skin aging, the role of stem cells in skin aging and the implications of skin aging for the microbiome and for the development of cancer. Conquest of the oft overlooked disease of skin aging should have broad implications that transcend the integument and inform novel approaches to retarding aging and age-related dysfunction in those internal organs that youthful skin was designed to envelop and safeguard.
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