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Caffeine potentiates the lethality of tumour necrosis factor in cancer cells.
In this study we have investigated the interaction of caffeine, a prototypic methylxanthine, and TNF on the induction of cell death in mouse and human cell lines during progression from G1 to successive phases of the cell cycle. Exposure of cells to TNF (0.1-100 ng ml-1) as single agent for 48 h cau...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
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Nature Publishing Group
1993
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1968497/ https://www.ncbi.nlm.nih.gov/pubmed/8512808 |
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author | Belizario, J. E. Tilly, J. L. Sherwood, S. W. |
author_facet | Belizario, J. E. Tilly, J. L. Sherwood, S. W. |
author_sort | Belizario, J. E. |
collection | PubMed |
description | In this study we have investigated the interaction of caffeine, a prototypic methylxanthine, and TNF on the induction of cell death in mouse and human cell lines during progression from G1 to successive phases of the cell cycle. Exposure of cells to TNF (0.1-100 ng ml-1) as single agent for 48 h caused low or no lethality. The rates of cell death increased significantly when cells cultured with TNF for 24 h were exposed to caffeine (2.5-20 mM). The magnitude of the enhancement by caffeine was TNF and caffeine dose-dependent. The most effective response to this combination was observed in the mouse cell lines, WEHI and L929, followed by the human cell lines, HeLa, A375 and MCF-7, respectively. In L929 cells, TNF treatment did not inhibit DNA synthesis during the first S phase of the cell cycle (20-24 h), but it did block the progress toward a second S phase, indicating the cells were arrested at G2 phase or mitosis. Caffeine had great enhancer effect on L929 cells exposed to TNF for 24 h, but the effect was reduced in cells with either less than 24 h or greater than 28 h of exposure. L929 cells stimulated with TNF died via apoptosis, as judged by both morphological criteria and the occurrence of internucleosomal DNA cleavage. Exposure of TNF-treated cells to caffeine caused a greater increase in the proportion of apoptotic cells as well as the extent of internucleosomal DNA fragmentation. IMAGES: |
format | Text |
id | pubmed-1968497 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1993 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-19684972009-09-10 Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. Belizario, J. E. Tilly, J. L. Sherwood, S. W. Br J Cancer Research Article In this study we have investigated the interaction of caffeine, a prototypic methylxanthine, and TNF on the induction of cell death in mouse and human cell lines during progression from G1 to successive phases of the cell cycle. Exposure of cells to TNF (0.1-100 ng ml-1) as single agent for 48 h caused low or no lethality. The rates of cell death increased significantly when cells cultured with TNF for 24 h were exposed to caffeine (2.5-20 mM). The magnitude of the enhancement by caffeine was TNF and caffeine dose-dependent. The most effective response to this combination was observed in the mouse cell lines, WEHI and L929, followed by the human cell lines, HeLa, A375 and MCF-7, respectively. In L929 cells, TNF treatment did not inhibit DNA synthesis during the first S phase of the cell cycle (20-24 h), but it did block the progress toward a second S phase, indicating the cells were arrested at G2 phase or mitosis. Caffeine had great enhancer effect on L929 cells exposed to TNF for 24 h, but the effect was reduced in cells with either less than 24 h or greater than 28 h of exposure. L929 cells stimulated with TNF died via apoptosis, as judged by both morphological criteria and the occurrence of internucleosomal DNA cleavage. Exposure of TNF-treated cells to caffeine caused a greater increase in the proportion of apoptotic cells as well as the extent of internucleosomal DNA fragmentation. IMAGES: Nature Publishing Group 1993-06 /pmc/articles/PMC1968497/ /pubmed/8512808 Text en https://creativecommons.org/licenses/by/4.0/This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Research Article Belizario, J. E. Tilly, J. L. Sherwood, S. W. Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
title | Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
title_full | Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
title_fullStr | Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
title_full_unstemmed | Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
title_short | Caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
title_sort | caffeine potentiates the lethality of tumour necrosis factor in cancer cells. |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1968497/ https://www.ncbi.nlm.nih.gov/pubmed/8512808 |
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