- Publikační typ
- abstrakt z konference MeSH
We characterized the effect of phytic acid (inositol hexaphosphate, IP6) as a potential adjuvant in treatment of colorectal carcinoma and evaluated the optimal concentration and treatment time to produe the maximal therapeutic effect. There is some evidence that myoinositol (Ins) can potentiate anti-cancer effects of IP6. Therefore, we tested both IP6 and Ins individually and in combination on human cell lines HT-29, SW-480 and SW-620 derived from colorectal carcinoma in different stages of malignancy. The effect of tested chemicals on the cells was measured using metabolic activity assay (WST-1), DNA synthesis assay (BrdU), protein synthesis assay (Brilliant Blue) and apoptosis (caspase-3 activity). We tested IP6 and Ins at three concentrations: 0.2, 1 and 5 mM for 24, 48 and 72 h. The concentrations and incubation periods were chosen according to low toxicity of the tested substance that was observed in a long-term clinical study. We found that all employed concentrations of IP6 or IP6/Ins decreased proliferation of the cell lines, with the maximum decrease being observed in HT-29 cells. Metabolic activity of treated cells differed in response to IP6 and IP6/Ins treatment; in HT-29 and SW-620 significant decrease was observed only at the highest concentration, whereas in SW-480 cells metabolic activity was lower at each concentration except 0.2 and 1 mM IP6 or IP6/Ins in 24-h incubation. The results from protein content assay corresponded to the results obtained from WST assay. In addition, we found maximum increase in caspase-3 activity at concentration 5 mM IP6 or IP6/Ins in HT-29 cells and with IP6 at concentration of 0.2 mM or IP6/Ins in SW-480 cells with clear indication of Ins enhancing the proapoptotic effect of IP6 in all the cell lines studied.
- MeSH
- apoptóza účinky léků MeSH
- inositol farmakologie MeSH
- kaspasa 3 metabolismus MeSH
- kolorektální nádory farmakoterapie patologie MeSH
- kyselina fytová farmakologie MeSH
- lidé MeSH
- nádorové buněčné linie MeSH
- nádorové proteiny analýza MeSH
- proliferace buněk účinky léků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
A number of cytotoxicity assays are currently available, each of them using specific approach to detect different aspects of cell viability, such as cell integrity, proliferation and metabolic functions. In this study we compared the potential of five commonly employed cytotoxicity assays (WST-1, XTT, MTT, Brilliant blue and Neutral red assay) to detect antiproliferative effects of three selenium compounds, sodium selenite, seleno-L-methionine (SeMet) and Se-(Methyl)selenocysteine (SeMCys) on three colorectal cancer cell lines in vitro. Cells were exposed to the selected selenium compounds in the concentration range of 0-256 microM during 48 h. WST-1 and XTT failed to detect cytotoxic effect, with the exception of the highest concentration of selenium compounds tested. Conversely, the metabolic activity of selenium treated cells measured by WST-1 and XTT significantly increased in comparison to untreated controls. MTT, Neutral red and Brilliant blue assays were more sensitive and yielded mutually comparable results, with significant decrease of measured parameters in a concentration-dependent manner. To a smaller extent, the results were affected by the different chemical nature of the selenium compounds tested as well as by the biological properties of individual cell lines.
- MeSH
- antikarcinogenní látky terapeutické užití toxicita MeSH
- cystein analogy a deriváty terapeutické užití toxicita MeSH
- cytotoxiny terapeutické užití toxicita MeSH
- lidé MeSH
- methionin analogy a deriváty terapeutické užití toxicita MeSH
- nádorové buněčné linie MeSH
- nádory tračníku farmakoterapie metabolismus prevence a kontrola MeSH
- organoselenové sloučeniny terapeutické užití toxicita MeSH
- proliferace buněk účinky léků MeSH
- seleničitan sodný terapeutické užití toxicita MeSH
- testy toxicity metody MeSH
- viabilita buněk účinky léků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- MeSH
- financování organizované MeSH
- Publikační typ
- abstrakty MeSH
The use of anthracycline anticancer drugs is limited by a cumulative, dose-dependent cardiac toxicity. Iron chelation has long been considered as a promising strategy to limit this unfavorable side effect, either by restoring the disturbed cellular iron homeostasis or by removing redox-active iron, which may promote anthracycline-induced oxidative stress. Aroylhydrazone lipophilic iron chelators have shown promising results in the rabbit model of daunorubicin-induced cardiomyopathy as well as in cellular models. The lack of interference with the antiproliferative effects of the anthracyclines also favors their use in clinical settings. The dose, however, should be carefully titrated to prevent iron depletion, which apparently also applies for other strong iron chelators. We have shown that a mere ability of a compound to chelate iron is not the sole determinant of a good cardioprotector and the protective potential does not directly correlate with the ability of the chelators to prevent hydroxyl radical formation. These findings, however, do not weaken the role of iron in doxorubicin cardiotoxicity as such, they rather appeal for further investigations into the molecular mechanisms how anthracyclines interact with iron and how iron chelation may interfere with these processes.
- MeSH
- antibiotika antitumorózní škodlivé účinky toxicita MeSH
- antracykliny škodlivé účinky toxicita MeSH
- chelátory železa farmakologie škodlivé účinky terapeutické užití MeSH
- financování organizované MeSH
- kardiotonika MeSH
- lidé MeSH
- nemoci srdce chemicky indukované metabolismus prevence a kontrola MeSH
- oxidační stres účinky léků MeSH
- železo fyziologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- přehledy MeSH
- MeSH
- financování organizované MeSH
- Publikační typ
- abstrakty MeSH
- MeSH
- aktiny chemie účinky léků MeSH
- apoptóza genetika účinky záření MeSH
- chromany toxicita MeSH
- cytoskeletální proteiny chemie účinky léků MeSH
- fibroblasty fyziologie účinky léků MeSH
- finanční podpora výzkumu jako téma MeSH
- kožní nemoci chemicky indukované MeSH
- lidé MeSH
- mitochondrie chemie účinky léků MeSH
- Check Tag
- lidé MeSH
