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4. Clathrin-mediated endocytosis is required for ANE 30-100K-induced autophagy.

Author

Mei-Huei Lin, Young-Chau Liu, Shyun-Yeu Liu, Fang-Chi Chen, Pei-Jung Yang, Guan-Hua Li, Pang-Yen Liu, Ching-Yu Yen, Lin, Mei-Huei, Liu, Young-Chau, Liu, Shyun-Yeu, Chen, Fang-Chi, Yang, Pei-Jung, Li, Guan-Hua, Liu, Pang-Yen, and Yen, Ching-Yu

Subjects
BETEL nut, BENZYL alcohol, CLATHRIN, DYNAMIN (Genetics), ENDOCYTOSIS, AUTOPHAGY, THERAPEUTICS, RNA metabolism, ALCOHOLS (Chemical class), BETEL palm, BIOCHEMISTRY, CELL lines, PHENOMENOLOGY, MEMBRANE proteins, MOUTH tumors, NERVE tissue proteins, NUTS, ORGANIC compounds, PLANT extracts
Abstract

Background: We identified an autophagy-inducing areca nut (AN) ingredient (AIAI) in the 30-100 kDa fraction of AN extract (ANE 30-100K). This study was to analyze the role of endocytosis in ANE 30-100K-induced autophagy.Methods: We used benzyl alcohol, dynasore, and shRNA of clathrin and dynamin to assess whether ANE 30-100K-induced cytotoxicity and accumulation of microtubule-associated protein 1 light chain 3 (LC3)-II were affected in oral (OECM-1) and esophageal (CE81T/VGH) carcinoma cells.Results: Both benzyl alcohol and dynasore effectively reduced ANE 30-100K-induced cytotoxicity and LC3-II accumulation in OECM-1 and CE81T/VGH cells. Downregulated protein expression of both clathrin and dynamin by their shRNA also significantly attenuated ANE 30-100K-induced elevation of LC3-II levels in CE81T/VGH cells.Conclusions: These results indicate that AIAI may be engulfed by cells through clathrin-mediated endocytosis, which promotes the execution of the following autophagy program. [ABSTRACT FROM AUTHOR]

Published
2018
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