Skin aging is an outward manifestation of other cellular and molecular aging processes occurring elsewhere in the body. These processes are known collectively as the "hallmarks" of aging, which are a series of basic health maintenance mechanisms that fail over time. Cellular senescence is one of the most studied of the hallmarks of aging; senescent cells accumulate over time and are major drives of the aging process. Here, we discuss the impact of cellular senescence in the context of skin aging, and discuss the emerging landscape of interventions designed for their selective removal by targeted cell death (senolytics) or rejuvenation (senomorphics). We discuss the serotherapeutic strategies that are currently under investigation for systemic aging, which may bring eventual benefits for skin health. Next, we discuss a newly discovered hallmark of aging, dysregulated mRNA processing, which can be targeted for the senomorphic effect. Finally, we highlight a new modality for manipulation of disrupted mRNA processing, oligonucleotide therapeutics. The emerging field of senotherapeutics is set to revolutionize how we view and treat skin aging, and senotherapies are now poised to become a new class of skincare interventions.
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