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Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death

PURPOSE: The induction of autophagic cell death is an important process in the development of anticancer therapeutics. We aimed to evaluate the activity of the ancient Chinese decoction Danggui Buxue Tang (DBT) against colorectal cancer (CRC) and the associated autophagy-related mechanism. MATERIALS...

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Autores principales: Chen, Shun-Ting, Lee, Tzung-Yan, Tsai, Tung-Hu, Huang, Yu-Chuen, Lin, Yin-Cheng, Lin, Chin-Ping, Shieh, Hui-Ru, Hsu, Ming-Ling, Chi, Chih-Wen, Lee, Ming-Cheng, Chang, Hen-Hong, Chen, Yu-Jen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Impact Journals LLC 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5687627/
https://www.ncbi.nlm.nih.gov/pubmed/29179457
http://dx.doi.org/10.18632/oncotarget.19902
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author Chen, Shun-Ting
Lee, Tzung-Yan
Tsai, Tung-Hu
Huang, Yu-Chuen
Lin, Yin-Cheng
Lin, Chin-Ping
Shieh, Hui-Ru
Hsu, Ming-Ling
Chi, Chih-Wen
Lee, Ming-Cheng
Chang, Hen-Hong
Chen, Yu-Jen
author_facet Chen, Shun-Ting
Lee, Tzung-Yan
Tsai, Tung-Hu
Huang, Yu-Chuen
Lin, Yin-Cheng
Lin, Chin-Ping
Shieh, Hui-Ru
Hsu, Ming-Ling
Chi, Chih-Wen
Lee, Ming-Cheng
Chang, Hen-Hong
Chen, Yu-Jen
author_sort Chen, Shun-Ting
collection PubMed
description PURPOSE: The induction of autophagic cell death is an important process in the development of anticancer therapeutics. We aimed to evaluate the activity of the ancient Chinese decoction Danggui Buxue Tang (DBT) against colorectal cancer (CRC) and the associated autophagy-related mechanism. MATERIALS AND METHODS: CT26 CRC cells were implanted into syngeneic BALB/c mice for the tumor growth assay. DBT extracts and DBT-PD (polysaccharide-depleted) fractions were orally administered. The toxicity profiles of the extracts were analyzed using measurements of body weight, hemogram, and biochemical parameters. The morphology of tissue sections was observed using light and transmission electron microscopy. Western blotting and small interference RNA assays were used to determine the mechanism. RESULTS: DBT-PD and DBT, which contained an equal amount of DBT-PD, inhibited CT26 syngeneic tumor growth. In the tumor specimen, the expression of microtubule-associated proteins 1A/1B light chain 3B (LC3B) was upregulated by DBT-PD and DBT. The development of autophagosomes was observed via transmission electron microscopy in tumors treated with DBT-PD and DBT. In vitro experiments for mechanism clarification demonstrated that DBT-PD could induce autophagic death in CT26 cells accompanied by LC3B lipidation, downregulation of phospho-p70(s6k), and upregulation of Atg7. RNA interference of Atg7, but not Atg5, partially reversed the effect of DBT-PD on LC3B lipidation and expression of phospho-p70(s6k) and Atg7. The changes in ultrastructural morphology and LC3B expression induced by DBT-PD were also partially blocked by the knockdown of Atg7 mRNA. CONCLUSION: DBT induced autophagic death of colorectal cancer cells through the upregulation of Atg7 and modulation of the mTOR/p70(s6k) signaling pathway.
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spelling pubmed-56876272017-11-20 Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death Chen, Shun-Ting Lee, Tzung-Yan Tsai, Tung-Hu Huang, Yu-Chuen Lin, Yin-Cheng Lin, Chin-Ping Shieh, Hui-Ru Hsu, Ming-Ling Chi, Chih-Wen Lee, Ming-Cheng Chang, Hen-Hong Chen, Yu-Jen Oncotarget Research Paper PURPOSE: The induction of autophagic cell death is an important process in the development of anticancer therapeutics. We aimed to evaluate the activity of the ancient Chinese decoction Danggui Buxue Tang (DBT) against colorectal cancer (CRC) and the associated autophagy-related mechanism. MATERIALS AND METHODS: CT26 CRC cells were implanted into syngeneic BALB/c mice for the tumor growth assay. DBT extracts and DBT-PD (polysaccharide-depleted) fractions were orally administered. The toxicity profiles of the extracts were analyzed using measurements of body weight, hemogram, and biochemical parameters. The morphology of tissue sections was observed using light and transmission electron microscopy. Western blotting and small interference RNA assays were used to determine the mechanism. RESULTS: DBT-PD and DBT, which contained an equal amount of DBT-PD, inhibited CT26 syngeneic tumor growth. In the tumor specimen, the expression of microtubule-associated proteins 1A/1B light chain 3B (LC3B) was upregulated by DBT-PD and DBT. The development of autophagosomes was observed via transmission electron microscopy in tumors treated with DBT-PD and DBT. In vitro experiments for mechanism clarification demonstrated that DBT-PD could induce autophagic death in CT26 cells accompanied by LC3B lipidation, downregulation of phospho-p70(s6k), and upregulation of Atg7. RNA interference of Atg7, but not Atg5, partially reversed the effect of DBT-PD on LC3B lipidation and expression of phospho-p70(s6k) and Atg7. The changes in ultrastructural morphology and LC3B expression induced by DBT-PD were also partially blocked by the knockdown of Atg7 mRNA. CONCLUSION: DBT induced autophagic death of colorectal cancer cells through the upregulation of Atg7 and modulation of the mTOR/p70(s6k) signaling pathway. Impact Journals LLC 2017-08-03 /pmc/articles/PMC5687627/ /pubmed/29179457 http://dx.doi.org/10.18632/oncotarget.19902 Text en Copyright: © 2017 Chen et al. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) 3.0 (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Paper
Chen, Shun-Ting
Lee, Tzung-Yan
Tsai, Tung-Hu
Huang, Yu-Chuen
Lin, Yin-Cheng
Lin, Chin-Ping
Shieh, Hui-Ru
Hsu, Ming-Ling
Chi, Chih-Wen
Lee, Ming-Cheng
Chang, Hen-Hong
Chen, Yu-Jen
Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death
title Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death
title_full Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death
title_fullStr Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death
title_full_unstemmed Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death
title_short Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death
title_sort traditional chinese medicine danggui buxue tang inhibits colorectal cancer growth through induction of autophagic cell death
topic Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5687627/
https://www.ncbi.nlm.nih.gov/pubmed/29179457
http://dx.doi.org/10.18632/oncotarget.19902
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