PRACTICAL ONCOLOGY JOURNAL ›› 2019, Vol. 33 ›› Issue (3): 211-214.doi: 10.11904/j.issn.1002-3070.2019.03.004

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Effect of ibudilast-microinjected into nucleus accumbens on appendix pain threshold in morphine-addicted rats

XU Qiuju1,ZHANG Guangwen2   

  1. 1.Harbin Medical University Cancer Hospital,Harbin 150081,China;
    2.The First People′s Hospital of Taizhou
  • Received:2018-11-19 Revised:2019-01-14 Online:2019-06-20 Published:2019-06-18

Abstract: Objective The aim of this study was to investigate the effect of microinjection ibudilast on the appendix pain threshold in nucleus accumbens(NAC)of morphine-addicted rats.Methods Normal rats and morphine-addicted rats were injected with ibudilast(5 μg/2 μL)or saline(2 μL)into NAC through glass microelectrode.The tail-flick period(TFL)was used as an indicator to observe the thermal pain threshold before and after ibuilast injection.Results After injected ibudilast 5 μg into the NAC of normal rats and morphine-added rats,the TFL was prolonged compared with that before injection,and the TFL prolongation of morphine-addicted rats was more significant than that of normal rats.There was no significant change in TFL after 2 μL of saline was injected into the NAC of normal rats and morphine-addicted rats.Conclusion Microinjection of ibudilast into NAC of normal rats and morphine-added rats can cause analgesic effect,and the analgesic effect of morphine-addicted rats is more significant.

Key words: Nucleus accumbens, Ibudilast, Morphine-addicted, Tail-flick latency

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