Skin Biomechanics and miRNA Expression Following Chronic UVB Irradiation.

Abstract:

:Objective: Exposure to ultraviolet (UV) light from the sun is known to accelerate the skin aging process and leads to significant alterations in skin biomechanics; however, the molecular mechanisms by which chronic UVB affects biomechanical properties of the skin have not been well described. Approach: A murine model for chronic UVB exposure was used to examine changes in epidermal barrier function, skin biomechanics, and miRNA expression as a result of UVB. Results: UVB irradiation caused skin to be weaker, less elastic, stiffer, and less pliable. Notably, these changes were not reversed after a 5-week period of recovery. Following UVB exposure, dermal collagen fibrils were significantly smaller in diameter and expression of the miR-34 family was significantly increased. Innovation: To our knowledge, this is the first study to concurrently examine alterations in skin function, miRNA expression, and tissue biomechanics in response to chronic UVB exposure. Conclusion: The data suggest that UVB alters miR-34 family expression in skin, in addition to dysregulating collagen structure with subsequent reductions in strength and elasticity. miRNAs may play a pivotal role in regulating extracellular matrix deposition and skin biomechanics following chronic UVB exposure, and thus may be a possible target for therapeutic development. However, additional studies are needed to directly probe the link between UVB exposure, miRNA production, and skin biomechanics.

journal_title

Advances in wound care

authors

Blackstone BN,Wilgus TA,Roy S,Wulff BC,Powell HM

doi

10.1089/wound.2019.1034

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

79-89

issue

3

eissn

2162-1918

issn

2162-1934

pii

10.1089/wound.2019.1034

journal_volume

9

pub_type

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