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Mediators of Inflammation
Volume 2018, Article ID 3941840, 9 pages
https://doi.org/10.1155/2018/3941840
Research Article

Proinflammatory Factors Mediate Paclitaxel-Induced Impairment of Learning and Memory

1Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, China
2Department of Pharmacology, Hebei Medical University, Shijiazhuang 050017, China
3Department of Urology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, China

Correspondence should be addressed to Xiu-Li Wang; moc.621@113lxgnaw

Received 29 September 2017; Revised 17 December 2017; Accepted 8 January 2018; Published 22 February 2018

Academic Editor: Luis I. Terrazas

Copyright © 2018 Zhao Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The chemotherapeutic agent paclitaxel is widely used for cancer treatment. Paclitaxel treatment impairs learning and memory function, a side effect that reduces the quality of life of cancer survivors. However, the neural mechanisms underlying paclitaxel-induced impairment of learning and memory remain unclear. Paclitaxel treatment leads to proinflammatory factor release and neuronal apoptosis. Thus, we hypothesized that paclitaxel impairs learning and memory function through proinflammatory factor-induced neuronal apoptosis. Neuronal apoptosis was assessed by TUNEL assay in the hippocampus. Protein expression levels of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in the hippocampus tissue were analyzed by Western blot assay. Spatial learning and memory function were determined by using the Morris water maze (MWM) test. Paclitaxel treatment significantly increased the escape latencies and decreased the number of crossing in the MWM test. Furthermore, paclitaxel significantly increased the number of TUNEL-positive neurons in the hippocampus. Also, paclitaxel treatment increased the expression levels of TNF-α and IL-1β in the hippocampus tissue. In addition, the TNF-α synthesis inhibitor thalidomide significantly attenuated the number of paclitaxel-induced TUNEL-positive neurons in the hippocampus and restored the impaired spatial learning and memory function in paclitaxel-treated rats. These data suggest that TNF-α is critically involved in the paclitaxel-induced impairment of learning and memory function.