Long non‑coding RNA HOTAIR promotes burn wound healing by regulating epidermal stem cells

Shi,Yan; Yang,Ronghua; Tu,Longxiang; Liu,Dewu

doi:10.3892/mmr.2020.11268

Long non‑coding RNA HOTAIR promotes burn wound healing by regulating epidermal stem cells

Authors:
- Yan Shi
- Ronghua Yang
- Longxiang Tu
- Dewu Liu
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Affiliations: Burns Institute, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China, Burns Department, The First People's Hospital of Foshan, Foshan, Guangdong 528000, P.R. China
Published online on: June 23, 2020 https://doi.org/10.3892/mmr.2020.11268
Pages: 1811-1820
Copyright: © Shi et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Local transplantation of epidermal stem cells (ESCs) exerts a therapeutic effect on burn wounds. However, cell viability can impede their clinical application. HOX antisense intergenic RNA (HOTAIR) is involved in regulating adult tissue stem cells, as well as in developmental patterning and pluripotency. However, little is known about its role in regulating ESCs. The present study was performed to investigate the effects of HOTAIR in the modulation of ESCs and wound repair. Firstly, reverse transcription‑quantitative PCR was used to detect the relative expression of HOTAIR during burn wound healing in mice to determine whether HOTAIR is associated with wound healing. Subsequently, ESCs derived from mouse skin were transfected with a lentiviral vector to overexpress or knockdown HOTAIR. The effects of HOTAIR on cell proliferation and differentiation were measured by 5‑bromodeoxyuridine and MTT assays, and by assessing NANOG mRNA expression. Lastly, mice with burns were administered a subcutaneous injection of HOTAIR‑overexpressing ESCs. Images were captured and histological analyses were performed to evaluate wound healing. The results revealed that the expression of HOTAIR gradually increased and peaked at day 7 post‑burn and maintained at relatively high levels until day 14 post‑burn during wound healing. Furthermore, overexpression of HOTAIR promoted ESC proliferation and maintained the stem cell state in vitro. By contrast, suppression of HOTAIR inhibited cell proliferation and cell stemness. It was also identified that HOTIR‑overexpressing ESCs accelerated re‑epithelialization and facilitated burn wound repair. In conclusion, the present findings confirmed an essential role of HOTAIR in the regulation of ESC proliferation and stemness. Therefore, targeting HOTAIR in ESCs may be a potentially promising therapy for burn wound healing.

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