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Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway
Treatment of hematologic malignancies is a formidable challenge for hematologists and there is an urgent need to identify safe and efficacious agents either via synthesis in the laboratory or isolation from natural products. Here, we report the cytotoxicity of extracts from mushroom Gymnopilus purpu...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8162692/ https://www.ncbi.nlm.nih.gov/pubmed/34048499 http://dx.doi.org/10.1371/journal.pone.0252541 |
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author | Dulay, Rich Milton Valdez, Benigno C. Li, Yang Chakrabarti, Seemanti Dhillon, Braham Kalaw, Sofronio P. Reyes, Renato G. Cabrera, Esperanza C. |
author_facet | Dulay, Rich Milton Valdez, Benigno C. Li, Yang Chakrabarti, Seemanti Dhillon, Braham Kalaw, Sofronio P. Reyes, Renato G. Cabrera, Esperanza C. |
author_sort | Dulay, Rich Milton |
collection | PubMed |
description | Treatment of hematologic malignancies is a formidable challenge for hematologists and there is an urgent need to identify safe and efficacious agents either via synthesis in the laboratory or isolation from natural products. Here, we report the cytotoxicity of extracts from mushroom Gymnopilus purpureosquamulosus Høil (G. pps) and describe its molecular mechanisms. Using leukemia, lymphoma and multiple myeloma cell lines, 28–35 ppm G. pps extract inhibited cell proliferation by ~46–79%, which correlates with activation of apoptosis as indicated by increase in annexin V-positive cells (~5–8-fold), production of reactive oxygen species (~2–3-fold), cells in sub G0/G1 phase (~3–13-fold), caspase 3 enzymatic activity (~1.6–2.9-fold), DNA fragmentation, PARP1 cleavage and down-regulation of prosurvival proteins. Mitochondrial membrane potential decreased and leakage of pro-apoptotic factors to cytoplasm was observed, consistent with the activation of intrinsic apoptosis. Western blot analysis showed activation of the ASK1-MEK-SAPK/JNK and ASK1-P38 MAPK pathways possibly due to changes in the cellular redox status as suggested by decreased protein levels of peroxiredoxin, thioredoxin and thioredoxin reductase. Moreover, antioxidant N-acetylcysteine alleviated the cytotoxicity of G. pps. Pharmacological inhibition of SAPK/JNK and P38 alleviated the G. pps-mediated cytotoxicity. The extract activated apoptosis in leukemia and lymphoma patient cell samples but not in mononuclear cells from healthy donors further supporting the therapeutic values of G. pps for hematologic malignancies. |
format | Online Article Text |
id | pubmed-8162692 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-81626922021-06-10 Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway Dulay, Rich Milton Valdez, Benigno C. Li, Yang Chakrabarti, Seemanti Dhillon, Braham Kalaw, Sofronio P. Reyes, Renato G. Cabrera, Esperanza C. PLoS One Research Article Treatment of hematologic malignancies is a formidable challenge for hematologists and there is an urgent need to identify safe and efficacious agents either via synthesis in the laboratory or isolation from natural products. Here, we report the cytotoxicity of extracts from mushroom Gymnopilus purpureosquamulosus Høil (G. pps) and describe its molecular mechanisms. Using leukemia, lymphoma and multiple myeloma cell lines, 28–35 ppm G. pps extract inhibited cell proliferation by ~46–79%, which correlates with activation of apoptosis as indicated by increase in annexin V-positive cells (~5–8-fold), production of reactive oxygen species (~2–3-fold), cells in sub G0/G1 phase (~3–13-fold), caspase 3 enzymatic activity (~1.6–2.9-fold), DNA fragmentation, PARP1 cleavage and down-regulation of prosurvival proteins. Mitochondrial membrane potential decreased and leakage of pro-apoptotic factors to cytoplasm was observed, consistent with the activation of intrinsic apoptosis. Western blot analysis showed activation of the ASK1-MEK-SAPK/JNK and ASK1-P38 MAPK pathways possibly due to changes in the cellular redox status as suggested by decreased protein levels of peroxiredoxin, thioredoxin and thioredoxin reductase. Moreover, antioxidant N-acetylcysteine alleviated the cytotoxicity of G. pps. Pharmacological inhibition of SAPK/JNK and P38 alleviated the G. pps-mediated cytotoxicity. The extract activated apoptosis in leukemia and lymphoma patient cell samples but not in mononuclear cells from healthy donors further supporting the therapeutic values of G. pps for hematologic malignancies. Public Library of Science 2021-05-28 /pmc/articles/PMC8162692/ /pubmed/34048499 http://dx.doi.org/10.1371/journal.pone.0252541 Text en https://creativecommons.org/publicdomain/zero/1.0/This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. |
spellingShingle | Research Article Dulay, Rich Milton Valdez, Benigno C. Li, Yang Chakrabarti, Seemanti Dhillon, Braham Kalaw, Sofronio P. Reyes, Renato G. Cabrera, Esperanza C. Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway |
title | Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway |
title_full | Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway |
title_fullStr | Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway |
title_full_unstemmed | Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway |
title_short | Cytotoxicity of Gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the SAPK/JNK signaling pathway |
title_sort | cytotoxicity of gymnopilus purpureosquamulosus extracts on hematologic malignant cells through activation of the sapk/jnk signaling pathway |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8162692/ https://www.ncbi.nlm.nih.gov/pubmed/34048499 http://dx.doi.org/10.1371/journal.pone.0252541 |
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