Implications of Ape1 in reactive oxygen signaling response following cisplatin treatment of dorsal root ganglion neurons

dc.contributor.authorJiang, Yanlin
dc.contributor.authorGuo, Chunlu
dc.contributor.authorVasko, Michael R.
dc.contributor.authorKelley, Mark R.
dc.date.accessioned2014-07-30T18:35:23Z
dc.date.available2014-07-30T18:35:23Z
dc.date.issued2008-08
dc.description.abstractPeripheral neuropathy is one of the major side-effects of the anticancer drug, cisplatin. Although previous work suggests that this neuropathy correlates with formation of DNA adducts in sensory neurons, growing evidence suggests that cisplatin also increases the generation of reactive oxygen species (ROS), which could cause DNA damage. Apurinic/apyrimidinic endonuclease/redox factor-1 (Ape1/Ref-1) is a multifunctional protein involved in DNA base excision repair (BER) of oxidative DNA damage and in redox regulation of a number of transcription factors. Therefore, we asked whether altering Ape1 functions would influence cisplatin induced neurotoxicity. Sensory neurons in culture were exposed to cisplatin for 24 hrs and several endpoints of toxicity were measured including production of ROS, cell death, apoptosis, and release of the immunoreactive calcitonin gene-related peptide (iCGRP). Reducing expression of Ape1 in neuronal cultures using siRNA enhances cisplatin-induced cell killing, apoptosis, ROS generation and the cisplatin-induced reduction in iCGRP release. Overexpressing wild-type (WT)-Ape1 attenuates all the toxic effects of cisplatin in cells containing normal endogenous levels of Ape1 and in cells with reduced Ape1 levels following Ape1siRNA treatment. Overexpressing the redox deficient/repair competent C65-Ape1 provides partial rescue, while the repair deficient Ape1 (N226A+R177A) does not protect neurons from cisplatin toxicity. We also observe an increase in phosphorylation of p53 following a decrease in Ape1 levels in sensory neuronal cultures. These results strongly support the notion that Ape1 is a potential translational target such that protecting Ape1 levels and particularly its DNA repair function could reduce peripheral neuropathy in patients undergoing cisplatin treatment.en_US
dc.identifier.citationJiang, Y., Guo, C., Vasko, M. R., & Kelley, M. R. (2008). Implications of Ape1 in reactive oxygen signaling response following cisplatin treatment of dorsal root ganglion neurons. Cancer research, 68(15), 6425.en_US
dc.identifier.urihttps://hdl.handle.net/1805/4815
dc.language.isoen_USen_US
dc.subjectROSen_US
dc.subjectAPE1en_US
dc.subjectbase excision repairen_US
dc.subjectneurotoxicityen_US
dc.titleImplications of Ape1 in reactive oxygen signaling response following cisplatin treatment of dorsal root ganglion neuronsen_US
dc.typeArticleen_US
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