1. Autophagy Suppresses Toll-Like Receptor 3-Mediated Inflammatory Reaction in Human Epidermal Keratinocytes.
- Author
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Li, Xue Mei, Jung, Kyung Eun, Yim, Su Hyuk, Hong, Dong Kyun, Kim, Chang Deok, Hong, Jeong Yeon, Lee, Ho Jung, Lee, Sung Yul, Kim, Jung Eun, and Park, Chang Wook
- Subjects
AUTOPHAGY ,ANIMAL experimentation ,CELLS ,EPIDERMIS ,KERATINOCYTES ,MICE ,POLYMERS ,PSORIASIS ,QUINOLINE ,RAPAMYCIN ,TOLL-like receptors ,IN vitro studies - Abstract
Autophagy, one mechanism of programmed cell death, is fundamental to cellular homeostasis. Previous studies have identified autophagy as a novel mechanism by which cytokines control the immune response. However, its precise role in immune-related inflammatory skin diseases such as psoriasis remains unclear. Thus, this study explored the functional role of autophagy in psoriatic inflammation of epidermal keratinocytes. Strong light chain 3 immunoreactivity was observed in epidermal keratinocytes of both human psoriatic lesions and imiquimod-induced mice psoriatic model, and it was readily induced by polycytidylic acid (poly (I:C)), which stimulates Toll-like receptor 3 (TLR3), in human epidermal keratinocytes in vitro. Rapamycin-induced activation of autophagy significantly reduced poly (I:C)-induced inflammatory reaction, whereas, inhibition of autophagy by 3-methyladeine increased that. Our results indicate that the induction of autophagy may attenuate TLR3-mediated immune responses in human epidermal keratinocytes, thus providing novel insights into the mechanisms underlying the development of inflammatory skin diseases including psoriasis. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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