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Effects of cisplatin on potassium currents in CT26 cells.
- Source :
- Journal of Cancer Research & Therapeutics; Jan-Mar2016, Vol. 12 Issue 1, p248-253, 6p
- Publication Year :
- 2016
-
Abstract
- <bold>Aims: </bold>Cisplatin, a platinum-based drug, is an important weapon against many types of cancer. It is well-known that cisplatin induces apoptosis. Potassium channel plays very important role in several signaling pathways. To investigate the possibility that potassium channels also have a role in the cellular response to cisplatin, we examined the effect of cisplatin on the activity of potassium channels on CT26 cell, the colon carcinoma cell line.<bold>Materials and Methods: </bold>The cells were cultured in DMEM, supplemented with 10< heat-inactivated fetal bovine serum. At mid-log phase, cultures were harvested, washed twice in phosphate-buffered saline, and resuspended in culture medium before use. Cells were voltage-clamped using the whole-cell patch clamp technique. Membrane current data were collected and amplified.<bold>Statistical Analysis: </bold>Differences between two groups were assessed by paired t-test and one sample t-test to compare the relative values. One-way ANOVA was used for all experiment with more than two groups.<bold>Results: </bold>Potassium currents were detected in CT26 cells and the currents were reduced by the application of tetraethylammonium (TEA) chloride, iberiotoxin, a big conductance calcium-activated potassium channel blocker and barium. The potassium currents were enhanced to 192< by the application of cisplatin (0.5 mM). Moreover, the increase of potassium currents by cisplatin was further inhibited by the application of TEA confirming the action of cisplatin on potassium channels. In addition, relative current induced by cisplatin in CT26 cells was bit larger than in normal IEC-6 cells.<bold>Conclusion: </bold>Potassium currents were detected in CT26 cells and the currents were reduced by the application of tetraethylammonium (TEA) chloride, iberiotoxin, a big conductance calcium-activated potassium channel blocker and barium. The potassium currents were enhanced to 192< by the application of cisplatin (0.5 mM). Moreover, the increase of potassium currents by cisplatin was further inhibited by the application of TEA confirming the action of cisplatin on potassium channels. In addition, relative current induced by cisplatin in CT26 cells was bit larger than in normal IEC-6 cells. [ABSTRACT FROM AUTHOR]
- Subjects :
- CISPLATIN
POTASSIUM channels
COLON cancer
TETRAETHYLAMMONIUM
BARIUM
CALCIUM metabolism
CANCER chemotherapy
POTASSIUM metabolism
APOPTOSIS
CANCER
CELL lines
CELLULAR signal transduction
COLON tumors
COMPARATIVE studies
CYTOLOGICAL techniques
RESEARCH methodology
MEDICAL cooperation
PEPTIDES
POTASSIUM
RESEARCH
EVALUATION research
Subjects
Details
- Language :
- English
- ISSN :
- 09731482
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of Cancer Research & Therapeutics
- Publication Type :
- Academic Journal
- Accession number :
- 114615134
- Full Text :
- https://doi.org/10.4103/0973-1482.154085