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ORIGINAL RESEARCH article
Front. Cell Dev. Biol.
Sec. Molecular and Cellular Pathology
Volume 13 - 2025 | doi: 10.3389/fcell.2025.1538197
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The skin, as the body's largest organ, functions as a vital barrier against environmental insults. Chronic exposure to ultraviolet (UV) radiation significantly contributes to premature aging, or photoaging, which leads to DNA damage and disrupts repair mechanisms. Exosomes, which are small extracellular vesicles, play a key role in cellto-cell communication and might help mitigate the effects of photoaging by transporting bioactive molecules to skin cells. Long non-coding RNAs (lncRNAs) are increasingly recognized for their regulatory roles in the photoaging process, influencing stress responses and DNA repair; however, their involvement in exosomes in the context of skin aging is not yet well understood. In this study, we developed a photoaging model using SD rats subjected to UVA and UVB irradiation, which led to significant changes in the dermis such as increased dryness, wrinkles, pigmentation, and vascular alterations. Histological evaluations showed uneven thickening of the epidermis, degradation of collagen and elastic fibers, and cellular infiltration.Exosomes isolated from the dermal tissues exposed to UV radiation displayed altered size distributions. Transcriptomic analyses of the UV-treated rats identified 2,332 lncRNAs and 5,906 mRNAs that were differentially expressed, revealing significant involvement in pathways related to oxidative stress, apoptosis, and cellular stress responses. A cis-regulatory analysis identified 1,327 essential interactions between lncRNAs and mRNAs, highlighting their role in controlling inflammation and apoptosis. Importantly, both IL-1B and GADD45B levels were significantly increased in the exosomes and UV-challenged HaCaT cells, indicating their crucial roles in responding to UV-induced stress. This study highlights the significant role of exosomal lncRNAs in managing cellular reactions to UV-induced stress, impacting regulatory pathways associated with apoptosis, inflammation, and oxidative stress. These insights pave the way for the development of lncRNA-focused therapeutic approaches to address UV-induced skin damage.
Keywords: Skin photoaging, exosome, lncRNA, rat, cis-Regulatory
Received: 11 Dec 2024; Accepted: 28 Mar 2025.
Copyright: © 2025 Li, Lin, Zhou, Guo, Lin and Ji. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Shu Lin, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
Chao Ji, Department of Dermatology, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, China
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
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