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Research ArticleBehavioral Pharmacology

Curcumin Attenuates Opioid Tolerance and Dependence by Inhibiting Ca2+/Calmodulin-Dependent Protein Kinase II α Activity

Xiaoyu Hu, Fang Huang, Magdalena Szymusiak, Ying Liu and Zaijie Jim Wang
Journal of Pharmacology and Experimental Therapeutics March 2015, 352 (3) 420-428; DOI: https://doi.org/10.1124/jpet.114.219303
Xiaoyu Hu
Department of Biopharmaceutical Sciences (X.H., F.H., Y.L., Z.J.W.), Cancer Center (Z.J.W.), and Department of Chemical Engineering (M.S., Y.L.), University of Illinois, Chicago, Illinois
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Fang Huang
Department of Biopharmaceutical Sciences (X.H., F.H., Y.L., Z.J.W.), Cancer Center (Z.J.W.), and Department of Chemical Engineering (M.S., Y.L.), University of Illinois, Chicago, Illinois
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Magdalena Szymusiak
Department of Biopharmaceutical Sciences (X.H., F.H., Y.L., Z.J.W.), Cancer Center (Z.J.W.), and Department of Chemical Engineering (M.S., Y.L.), University of Illinois, Chicago, Illinois
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Ying Liu
Department of Biopharmaceutical Sciences (X.H., F.H., Y.L., Z.J.W.), Cancer Center (Z.J.W.), and Department of Chemical Engineering (M.S., Y.L.), University of Illinois, Chicago, Illinois
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Zaijie Jim Wang
Department of Biopharmaceutical Sciences (X.H., F.H., Y.L., Z.J.W.), Cancer Center (Z.J.W.), and Department of Chemical Engineering (M.S., Y.L.), University of Illinois, Chicago, Illinois
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Abstract

Chronic use of opioid analgesics has been hindered by the development of opioid addiction and tolerance. We have reported that curcumin, a natural flavonoid from the rhizome of Curcuma longa, attenuated opioid tolerance, although the underlying mechanism remains unclear. In this study, we tested the hypothesis that curcumin may inhibit Ca2+/calmodulin-dependent protein kinase II α (CaMKIIα), a protein kinase that has been previously proposed to be critical for opioid tolerance and dependence. In this study, we used state-of-the-art polymeric formulation technology to produce poly(lactic-co-glycolic acid) (PLGA)-curcumin nanoparticles (nanocurcumin) to overcome the drug’s poor solubility and bioavailability, which has made it extremely difficult for studying in vivo pharmacological actions of curcumin. We found that PLGA-curcumin nanoparticles reduced the dose requirement by 11- to 33-fold. Pretreatment with PLGA-curcumin (by mouth) prevented the development of opioid tolerance and dependence in a dose-dependent manner, with ED50 values of 3.9 and 3.2 mg/kg, respectively. PLGA-curcumin dose-dependently attenuated already-established opioid tolerance (ED50 = 12.6 mg/kg p.o.) and dependence (ED50 = 3.1 mg/kg p.o.). Curcumin or PLGA-curcumin did not produce antinociception by itself or affect morphine (1–10 mg/kg) antinociception. Moreover, we found that the behavioral effects of curcumin on opioid tolerance and dependence correlated with its inhibition of morphine-induced CaMKIIα activation in the brain. These results suggest that curcumin may attenuate opioid tolerance and dependence by suppressing CaMKIIα activity.

Footnotes

    • Received August 11, 2014.
    • Accepted November 25, 2014.
  • This work was supported in part by the National Institutes of Health National Center for Complementary and Alternative Medicine [Grant K07-AT003647]. Nanoparticle formation was supported by a University of Illinois at Chicago Proof of Concept award. Mechanistic CaMKII study received funds from the National Science Foundation of China (81328009). Its contents are solely the responsibility of the authors and do not necessarily represent the official views of National Center for Complementary and Alternative Medicine or the National Institutes of Health (NIH). The final peer-reviewed manuscript is subject to the NIH Public Access Policy.

  • dx.doi.org/10.1124/jpet.114.219303.

  • Copyright © 2015 by The American Society for Pharmacology and Experimental Therapeutics
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Journal of Pharmacology and Experimental Therapeutics: 352 (3)
Journal of Pharmacology and Experimental Therapeutics
Vol. 352, Issue 3
1 Mar 2015
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Research ArticleBehavioral Pharmacology

Curcumin in Opioid Tolerance and Dependence

Xiaoyu Hu, Fang Huang, Magdalena Szymusiak, Ying Liu and Zaijie Jim Wang
Journal of Pharmacology and Experimental Therapeutics March 1, 2015, 352 (3) 420-428; DOI: https://doi.org/10.1124/jpet.114.219303

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Research ArticleBehavioral Pharmacology

Curcumin in Opioid Tolerance and Dependence

Xiaoyu Hu, Fang Huang, Magdalena Szymusiak, Ying Liu and Zaijie Jim Wang
Journal of Pharmacology and Experimental Therapeutics March 1, 2015, 352 (3) 420-428; DOI: https://doi.org/10.1124/jpet.114.219303
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