The Science of Skin Aging: Cellular Mechanisms and Targeted Longevity Strategies

Dr Helen He explores the molecular drivers of skin aging, including cellular senescence, chronic inflammation, oxidative stress, skin barrier dysfunction, and impaired DNA repair. Learn how advances in aging biology are enabling targeted therapies and how dermatologists can apply a personalized, multimodal approach—including lifestyle, topicals, and aesthetic treatments—to promote healthier, longer-lasting skin.

Transcript

My name is Dr Helen He. I am a general and cosmetic dermatologist at Mount Sinai, where I am director of lasers and cosmetic surgery and co-director of the Mount Sinai Clinic Healthy Skin Dermatology Center. I also have a research interest into better understanding the molecular mechanisms that undermine skin aging so that we can develop more targeted and evidence-based therapeutic strategies to stimulate skin longevity.

What are the most important molecular or cellular mechanisms driving skin aging that clinicians should understand today?

Dr He: So some of the most important drivers of skin aging include senescence, chronic inflammation, skin barrier breakdown, oxidative stress, and the loss of your skin's ability to repair damaged DNA and proteins. So it's also really important to remember that all of these processes, they don't occur in isolation. They're all very much interconnected in complex signaling pathways.

How are advances in aging biology—such as inflammation, oxidative stress, and cellular signaling—translating into new therapeutic strategies?

Dr He: So by understanding the biology of aging in a more rigorous way and defining skin-specific biomarkers, we can develop therapeutics that are targeted to these biomarkers and pathways, so effectively tackling skin aging at its root cause. This actually follows a pipeline that has been very successful in dermatology, specifically in inflammatory skin diseases, where skin molecular profiling helped us to develop hypotheses about underlying cellular and molecular changes, which then guides therapeutic development and innovation. And I really think we can do the same thing in skin aging.

How can dermatologists apply this evolving science in everyday practice to better prevent or slow visible skin aging in patients?

Dr He: So I think that when creating a treatment plan with patients, we need to be comprehensive and holistic with our approach. So it's not just about removing a single wrinkle. A patient may be asking about wrinkles or lines or laxity on the face, but as their provider, we really should be taking a few steps back. Thinking about what is actually driving those changes, what's driving those lines to form, the skin laxity to develop. And we should be coming up with a multimodal plan that's comprehensive and combined lifestyle modification, topicals, aesthetic procedures, and perhaps even systemic therapies.

Are there any tips or insights you would like to share regarding the science of skin aging?

Dr He: Well, I think the main tip I have is to consider the skin aging science when coming up with a treatment plan for patients. So again, looking at your patient, thinking about their clinical presentation, realizing also that skin aging is so heterogeneous that no two patients are going to really age in the same way. So your approach to them should also not be cookie-cutter. And it's important to consider like what are their unique features of aging and then taking again a step back, what are the unique drivers can be contributing to those changes. And then making sure to come up with a treatment plan that's tailored to them.