Skin Moisturizer Could Reduce Risk of Disease
The skin is our largest organ. One of its primary functions, of course, is to protect our insides from the dangers outside.
It also detects heat and cold, helps to regulate our internal temperature, and allows us to sense touch.
Despite its huge size, scientists do not often consider the skinâ€™s role in chronic disease.
However, a group of researchers from the University of California San Francisco (UCSF), are bucking the trend. They are focused intently on understanding the role of skin in age-related chronic disease.
As people age, levels of inflammation in their bodies steadily increase. Scientists refer to this as inflammaging. Cytokines are important drivers of this inflammation, and the scientists involved in the current study want to understand whether the skin might be involved.
Inflammaging and the skin
Scientists have already outlined a relationship between inflammation and a range of conditions, including type 2 diabetes, atherosclerosis, Alzheimerâ€™s disease, and osteoporosis.
â€œThe inflammation must come from an organ big enough that very minor inflammation can affect the whole body. Skin is a good candidate for this because of its size.â€
Dr. Man, who is a research scientist in the Department of Dermatology at UCSF, continued, â€œOnce we get old, we have dermatological symptoms like itchiness, dryness, and changes in acidity. It could be that the skin has very minor inflammation, and because itâ€™s such a large organ, it elevates circulating cytokine levels.â€
Skin and chronic disease
As we age, skin becomes drier and less reliable. Age also affects the skinâ€™s permeability, meaning that it has trouble keeping water in and pathogens out. A reduction in skin moisture allows small cracks to appear, which sparks the release of cytokines into the blood supply.
In younger skin, cytokines help to repair cracks in the skin. Older skin, however, is more difficult to fix, which means that the body continually releases these inflammatory messengers; once they are in the blood, they can travel around the body.
Of course, aging skin is far more common than dermatitis or psoriasis; therefore, according to Dr. Mauro, â€œthe overall risk to the population from aging skin could far outweigh that seen from skin diseases.â€
She believes that â€œ[d]ecreasing inflammation simply by treating the skin dysfunction seen in aging could have profound health effects.â€
Can we reduce the risks of inflammaging?
Because this experiment used a particularly small sample, researchers will need to carry out much larger trials before they can reach reliable conclusions. Firstly, future studies will need to confirm that they can replicate the effect that they measured.
Secondly, they will need to demonstrate that a reduction in circulating cytokines has significant health benefits in the long run.
Follow-up research will, no doubt, begin soon. Whether the scientists replicate the findings or not, the topic of skin inflammation and chronic disease is sure to enjoy further scrutiny.
As the United States population ages, one canâ€™t help but hope that an intervention as simple as applying moisturizer might ward off age-related disease.
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