國家衛生研究院 NHRI:Item 3990099045/3785
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    题名: The mechanism of the actions of oxaliplatin on ion currents and action potentials in differentiated NG108-15 neuronal cells
    作者: Wu, SN;Chen, BS;Wu, YH;Peng, H;Chen, LT
    贡献者: National Institute of Cancer Research
    摘要: Oxaliplatin (OXAL) is a platinum-based chemotherapeutic agent which is effective against advanced or metastatic gastrointestinal cancer. However, the mechanisms responsible for the development of the neuropathy induced by this agent remain unclear. In this study, we attempted to evaluate the possible effects of OXAL on ion currents and action potentials (APs) in NG108-15 cells differentiated with dibutyryl cyclic-AMP. Application of OXAL decreased the peak amplitude of voltage-gated Na+ current (INa) with no change in the overall current-voltage relations of the currents. This agent also produced a concentration-dependent slowing of INa inactivation. A further application of ranolazine reversed OXAL-induced slowing of INa inactivation. Unlike ranolazine or riluzole, OXAL had no effect on persistent INa elicited by long ramp pulses. OXAL (100 μM) also had little or no effect on the peak amplitude of L-type Ca2+ currents in NG108-15 cells, while it suppressed delayed-rectifier K+ current. In current-clamp recordings, OXAL alone reduced the amplitude of APs; however, it did not alter the duration of APs. However, after application of tefluthrin, OXAL did increase the duration of APs. Moreover, OXAL decreased the peak amplitude of INa with a concomitant reduction of current inactivation in HEK293T cells expressing SCN5A. The effects of OXAL on ion currents presented here may contribute to its neurotoxic actions in vivo.
    日期: 2009-07
    關聯: NeuroToxicology. 2009 Jul;30(4):677-685.
    Link to: http://dx.doi.org/10.1016/j.neuro.2009.04.010
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0161-813X&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000268834700021
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=67651001970
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