Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells
Quercetin is a known specific inhibitor of hsp70 synthesis and thus might be a potent agent for enhancing the selective cytotoxicity of heat on tumour cells. A comparative analysis of the effects of quercetin and five structurally related flavonoids on hsp90α, hsp70A, hsp60 and hsp27 gene expression...
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| Format: | Article |
| Language: | English |
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University of Zagreb Faculty of Food Technology and Biotechnology
2002-01-01
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| Series: | Food Technology and Biotechnology |
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| Online Access: | http://hrcak.srce.hr/file/263175 |
| _version_ | 1797423783152189440 |
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| author | Herwig O. Gutzeit Jutta Ludwig-Müller Gordana Rusak |
| author_facet | Herwig O. Gutzeit Jutta Ludwig-Müller Gordana Rusak |
| author_sort | Herwig O. Gutzeit |
| collection | DOAJ |
| description | Quercetin is a known specific inhibitor of hsp70 synthesis and thus might be a potent agent for enhancing the selective cytotoxicity of heat on tumour cells. A comparative analysis of the effects of quercetin and five structurally related flavonoids on hsp90α, hsp70A, hsp60 and hsp27 gene expression was carried out using human myeloid leukaemia cells (HL-60). The cells were preincubated with 50 μM quercetin, kaempferol, myricetin, taxifolin, isorhamnetin, methylquercetagetin or 0.1 % DMSO (controls) for 24 h at 37 °C before heat shock treatment (43 °C for 30 min). Total RNA was isolated from heat-stressed and unstressed cells and analysed by RT PCR. Hsp27 gene expression was inhibited by flavonoids more strongly than other hsp genes investigated in heat stressed as well as in unstressed cells. Among the hsp genes tested, only hsp60 was expressed above control level under the influence of taxifolin. Members of the hsp70 and hsp27 families are highly expressed in breast and lung cancer and leukaemias and they play a role in the acquired resistance to chemotherapy or radiation therapy combined with hyperthermia. Therefore, hsps present potential targets for cancer diagnosis and treatment. The present structure/activity study indicates that position, number and substitution of hydroxyl groups of the B ring and saturation of the C2-C3 bond are important factors affecting flavonoid activity on hsp gene expression. This study could help provide a basis for further design of specific inhibitors of hsp gene expression. |
| first_indexed | 2024-03-09T07:52:47Z |
| format | Article |
| id | doaj.art-85dd76df9c274f40b4c48e8c2fc9f6e6 |
| institution | Directory Open Access Journal |
| issn | 1330-9862 1334-2606 |
| language | English |
| last_indexed | 2024-03-09T07:52:47Z |
| publishDate | 2002-01-01 |
| publisher | University of Zagreb Faculty of Food Technology and Biotechnology |
| record_format | Article |
| series | Food Technology and Biotechnology |
| spelling | doaj.art-85dd76df9c274f40b4c48e8c2fc9f6e62023-12-03T01:28:40ZengUniversity of Zagreb Faculty of Food Technology and BiotechnologyFood Technology and Biotechnology1330-98621334-26062002-01-01404267273Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia CellsHerwig O. Gutzeit0Jutta Ludwig-Müller1Gordana Rusak2Institute of Zoology, TU Dresden, D-01062 Dresden, GermanyInstitute of Botany, TU Dresden, D-01062 Dresden, GermanyDepartment of Biology, Faculty of Science, Marulićev trg 20/II, 10000 Zagreb, CroatiaQuercetin is a known specific inhibitor of hsp70 synthesis and thus might be a potent agent for enhancing the selective cytotoxicity of heat on tumour cells. A comparative analysis of the effects of quercetin and five structurally related flavonoids on hsp90α, hsp70A, hsp60 and hsp27 gene expression was carried out using human myeloid leukaemia cells (HL-60). The cells were preincubated with 50 μM quercetin, kaempferol, myricetin, taxifolin, isorhamnetin, methylquercetagetin or 0.1 % DMSO (controls) for 24 h at 37 °C before heat shock treatment (43 °C for 30 min). Total RNA was isolated from heat-stressed and unstressed cells and analysed by RT PCR. Hsp27 gene expression was inhibited by flavonoids more strongly than other hsp genes investigated in heat stressed as well as in unstressed cells. Among the hsp genes tested, only hsp60 was expressed above control level under the influence of taxifolin. Members of the hsp70 and hsp27 families are highly expressed in breast and lung cancer and leukaemias and they play a role in the acquired resistance to chemotherapy or radiation therapy combined with hyperthermia. Therefore, hsps present potential targets for cancer diagnosis and treatment. The present structure/activity study indicates that position, number and substitution of hydroxyl groups of the B ring and saturation of the C2-C3 bond are important factors affecting flavonoid activity on hsp gene expression. This study could help provide a basis for further design of specific inhibitors of hsp gene expression.http://hrcak.srce.hr/file/263175hsp genesflavonoidsleukaemiaHL-60dietary supplements |
| spellingShingle | Herwig O. Gutzeit Jutta Ludwig-Müller Gordana Rusak Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells Food Technology and Biotechnology hsp genes flavonoids leukaemia HL-60 dietary supplements |
| title | Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells |
| title_full | Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells |
| title_fullStr | Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells |
| title_full_unstemmed | Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells |
| title_short | Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells |
| title_sort | effects of structurally related flavonoids on hsp gene expression in human promyeloid leukaemia cells |
| topic | hsp genes flavonoids leukaemia HL-60 dietary supplements |
| url | http://hrcak.srce.hr/file/263175 |
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