Particulate Matter-Induced Aryl Hydrocarbon Receptor Regulates Autophagy in Keratinocytes

Jang, Hye sung; Lee, Ji eun; Myung, Cheol hwan; Park, Jong il; Jo, Chan song; Hwang, Jae Sung

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자료유형: 학술저널

저자정보: Jang, Hye sung (Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University) Lee, Ji eun (Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University) Myung, Cheol hwan (Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University) Park, Jong il (Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University) Jo, Chan song (Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University) Hwang, Jae Sung (Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University)

저널정보: 한국응용약물학회 Biomolecules & Therapeutics(구 응용약물학회지) Biomolecules & therapeutics 제27권 제6호

발행연도: 2019.1

수록면: 570 - 576 (7page)

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Particulate matter (PM), which refers to the mixture of particles present in the air, can have harmful effects. Damage to cells by PM, including disruption of organelles and proteins, can trigger autophagy, and the relationship between autophagy and PM has been well studied. However, the cellular regulators of PM-induced autophagy have not been well characterized, especially in keratinocytes. The Aryl Hydrocarbon Receptor (AhR) is expressed in the epidermis and is activated by PM. In this study, we investigated the role of the AhR in PM-induced autophagy in HaCaT cells. Our results showed that PM led to AhR activation in keratinocytes. Activation of the AhR-target gene CYP1A1 by PM was reduced by co-treatment with ${\alpha}$-naphthoflavone (${\alpha}-NF$), an AhR inhibitor. We also evaluated activation of the autophagy pathway in PM-treated keratinocytes. In HaCaT cells, treatment with PM treatment led to the induction of microtubules-associated proteins light chain 3 (LC3) and p62/SQSTM1, which are essential components of the autophagy pathway. To study the role of the AhR in mediating PM-induced autophagy, we treated cells with ${\alpha}-NF$ or used an siRNA against AhR. Expression of LC3-II induced by PM was decreased in a dose dependent manner by ${\alpha}-NF$. Furthermore, knockdown of AhR with siAhR diminished PM-induced expression of LC3-II and p62. Together, these results suggest that inhibition of the AhR decreases PM-induced autophagy. We confirmed these results using the autophagy-inhibitors BAF and 3-MA. Taken together, our results indicate that exposure to PM induces autophagy via the AhR in HaCaT keratinocytes.

#PM #AhR #Autophagy #LC3 #p62 #Keratinocytes

참고문헌 (26)

참고문헌 신청

Abbas, S / 2017 / Aryl hydrocarbon receptor activation contributes to benzanthrone-induced hyperpigmentation via modulation of melanogenic signaling pathways / Chem. Res. Toxicol 30:625~634

Bjorkoy, G / 2005 / p62/SQSTM1 forms protein aggregates degraded by autophagy and has a protective effect on huntingtin-induced cell death / J. Cell Biol 171:603~614

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Davarinos, N. A / 1999 / Aryl hydrocarbon receptor imported into the nucleus following ligand binding is rapidly degraded via the cytosplasmic proteasome following nuclear export / J. Biol. Chem 274:28708~28715

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