1 research outputs found
Evaluation of IL-6 secretion by colon cancer cells treated with phytic acid
BACKGROUND Series of evidences have shown that interleukin-6 (IL-6) could play an important role in the pathogenesis of colon cancer. Inositol hexaphosphate (IP6) is a naturally occurring polyphosphorylated carbohydrate, found in many plant sources and in certain high-fi ber diets. Over the past few years interest in IP6 has stemmed mostly from its potentially important antineoplastic activity against various types of cancer, including colon cancer. Moreover, it was pointed out that IP6 has ability to act on the host immune functions and infl ammatory processes by controlling the synthesis of cytokines such as IL-6. The aim of this study was to evaluate the infl uence of IP6 on IL-6 secretion by malignant epithelial colorectal Caco-2 cells. MATERIAL AND METHODS The Caco-2 cells were treated with IP6 at the concentrations of 1.0; 2.5; 5.0 mM for 1; 6; 12 and 24 hours. The level of IL-6 was measured by enzyme-linked immunosorbent assay. The concentration of IL-6 was related to the amount of total cell protein which was estimated by the Bradford method (pg/mg). RESULTS It was found that colorectal Caco-2 cells constitutively secreted IL-6 at the constant level during 24 hour culture. IP6 down-regulated IL-6 secretion in a dose and time dependent manner. Conclusion old The present findings demonstrate that IP6 in the lumen of the large intestine may play an immunoregulatory role by inducing changes in IL-6 secretion by epithelial colon cells.WST臉P Szereg danych wskazuje, 偶e interleukina-6 (IL-6) mo偶e odgrywa膰 potencjaln膮 rol臋 w patogenezie raka jelita grubego. W ci膮gu ostatnich lat szczeg贸ln膮 uwag臋 naukowc贸w zwraca aktywno艣膰 przeciwnowotworowa kwasu fitynowego (IP6), ufosforylowanego w臋glowodanu, sk艂adnika diety bogatob艂onnikowej. Pojawi艂y si臋 sugestie, 偶e mo偶e on modulowa膰 przebieg reakcji odporno艣ciowych i stan贸w zapalnych mi臋dzy innymi poprzez regulacj臋 syntezy cytokin takich jak IL-6. Celem pracy by艂a ocena wp艂ywu IP6 na sekrecj臋 IL-6 przez kom贸rki nowotworowe jelita grubego linii Caco-2. MATERIA艁 I METODY Kom贸rki linii Caco-2 eksponowano na dzia艂anie IP6 w st臋偶eniach 1,0; 2,5; 5,0 mM przez 1; 6; 12 i 24 godziny. Oznaczenie st臋偶enia IL-6 w hodowlach przeprowadzono przy u偶yciu testu ELISA, natomiast do oznaczenia st臋偶enia bia艂ka zastosowano metod臋 Bradforda. St臋偶enie IL-6 wyra偶ono w pg/mg bia艂ka kom贸rek. WYNIKI Stwierdzono, 偶e transformowane kom贸rki nab艂onkowe jelita grubego linii Caco-2 wykazuj膮 konstytutywn膮 sekrecj臋 IL-6, utrzymuj膮c膮 si臋 na sta艂ym poziomie w czasie trwania do艣wiadczenia. IP6 posiada zdolno艣膰 do zmniejszania tej sekrecji w spos贸b zale偶ny od jego st臋偶enia i czasu dzia艂ania na kom贸rki. WNIOSKI Wyniki bada艅 sugeruj膮, 偶e IP6 obecny w 艣wietle jelita mo偶e wywiera膰 efekty immunoregulatorowe zwi膮zane ze zmianami sekrecji IL-6 w kom贸rkach nab艂onka jelitowego