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Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide
Autophagy is one of the major causes of drug resistance. For example, the angiogenesis inhibitor bevacizumab shows only transient and short-term therapeutic effects, whereas long-term therapeutic benefits are rarely observed, probably due to hypoxia-induced autophagy. Nitric oxide (NO) is an importa...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BlackWell Publishing Ltd
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4399024/ https://www.ncbi.nlm.nih.gov/pubmed/25457681 http://dx.doi.org/10.1111/cas.12577 |
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author | Ishima, Yu Inoue, Aki Fang, Jun Kinoshita, Ryo Ikeda, Mayumi Watanabe, Hiroshi Maeda, Hiroshi Otagiri, Masaki Maruyama, Toru |
author_facet | Ishima, Yu Inoue, Aki Fang, Jun Kinoshita, Ryo Ikeda, Mayumi Watanabe, Hiroshi Maeda, Hiroshi Otagiri, Masaki Maruyama, Toru |
author_sort | Ishima, Yu |
collection | PubMed |
description | Autophagy is one of the major causes of drug resistance. For example, the angiogenesis inhibitor bevacizumab shows only transient and short-term therapeutic effects, whereas long-term therapeutic benefits are rarely observed, probably due to hypoxia-induced autophagy. Nitric oxide (NO) is an important molecule with multiple functions, and it has recently been reported to function as a regulator of autophagy. Therefore, a reasonable therapeutic strategy for overcoming drug resistance by NO would involve it being directly delivered to the tumor. Here, we investigated the inhibitory effect of NO on autophagy by using a macromolecular NO donor S-nitrosated human serum albumin (SNO-HSA) with a high degree of NO loading and tumor targeting potential. In colon 26 (C26) cells, SNO-HSA significantly suppressed hypoxia-induced autophagy by inhibiting the phosphorylation of JNK1 and the expression of its downstream molecule Beclin1. The effect of SNO-HSA was also confirmed in vivo by combining it with Bev. In C26-bearing mice, significant suppression of tumor growth as well as lung metastasis was achieved in the combination group compared to the SNO-HSA or bevacizumab alone group. Similar to the in vitro experiments, the immunostaining of tumor tissues clearly showed that SNO-HSA inhibited the autophagy of tumor cells induced by bevacizumab treatment. In addition to other known antitumor effects of SNO-HSA, that is, the induction of apoptosis and the inhibition of multidrug efflux pumps, these data may open alternate strategies for cancer chemotherapy by taking advantage of the ability of SNO-HSA to suppress autophagy-mediated drug resistance and enhance the efficacy of chemotherapy. |
format | Online Article Text |
id | pubmed-4399024 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | BlackWell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-43990242015-10-05 Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide Ishima, Yu Inoue, Aki Fang, Jun Kinoshita, Ryo Ikeda, Mayumi Watanabe, Hiroshi Maeda, Hiroshi Otagiri, Masaki Maruyama, Toru Cancer Sci Original Articles Autophagy is one of the major causes of drug resistance. For example, the angiogenesis inhibitor bevacizumab shows only transient and short-term therapeutic effects, whereas long-term therapeutic benefits are rarely observed, probably due to hypoxia-induced autophagy. Nitric oxide (NO) is an important molecule with multiple functions, and it has recently been reported to function as a regulator of autophagy. Therefore, a reasonable therapeutic strategy for overcoming drug resistance by NO would involve it being directly delivered to the tumor. Here, we investigated the inhibitory effect of NO on autophagy by using a macromolecular NO donor S-nitrosated human serum albumin (SNO-HSA) with a high degree of NO loading and tumor targeting potential. In colon 26 (C26) cells, SNO-HSA significantly suppressed hypoxia-induced autophagy by inhibiting the phosphorylation of JNK1 and the expression of its downstream molecule Beclin1. The effect of SNO-HSA was also confirmed in vivo by combining it with Bev. In C26-bearing mice, significant suppression of tumor growth as well as lung metastasis was achieved in the combination group compared to the SNO-HSA or bevacizumab alone group. Similar to the in vitro experiments, the immunostaining of tumor tissues clearly showed that SNO-HSA inhibited the autophagy of tumor cells induced by bevacizumab treatment. In addition to other known antitumor effects of SNO-HSA, that is, the induction of apoptosis and the inhibition of multidrug efflux pumps, these data may open alternate strategies for cancer chemotherapy by taking advantage of the ability of SNO-HSA to suppress autophagy-mediated drug resistance and enhance the efficacy of chemotherapy. BlackWell Publishing Ltd 2015-02 2015-01-28 /pmc/articles/PMC4399024/ /pubmed/25457681 http://dx.doi.org/10.1111/cas.12577 Text en © 2014 The Authors. Cancer Science published by Wiley Publishing Asia Pty Ltd on behalf of Japanese Cancer Association. http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
spellingShingle | Original Articles Ishima, Yu Inoue, Aki Fang, Jun Kinoshita, Ryo Ikeda, Mayumi Watanabe, Hiroshi Maeda, Hiroshi Otagiri, Masaki Maruyama, Toru Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
title | Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
title_full | Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
title_fullStr | Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
title_full_unstemmed | Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
title_short | Poly-S-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
title_sort | poly-s-nitrosated human albumin enhances the antitumor and antimetastasis effect of bevacizumab, partly by inhibiting autophagy through the generation of nitric oxide |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4399024/ https://www.ncbi.nlm.nih.gov/pubmed/25457681 http://dx.doi.org/10.1111/cas.12577 |
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