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El Nebrisi EG, Bagdas D, Toma W, Al Samri H, Brodzik A, Alkhlaif Y, Yang KHS, Howarth FC, Damaj IM, Oz M. Curcumin Acts as a Positive Allosteric Modulator of α7-Nicotinic Acetylcholine Receptors and Reverses Nociception in Mouse Models of Inflammatory Pain. J Pharmacol Exp Ther 2018; 365:190-200. [PMID: 29339457 DOI: 10.1124/jpet.117.245068] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/27/2017] [Indexed: 12/11/2022] Open
Abstract
Effects of curcumin, a major ingredient of turmeric, were tested on the function of the α7-subunit of the human nicotinic acetylcholine (α7-nACh) receptor expressed in Xenopus oocytes and on nociception in mouse models of tonic and visceral pain. Curcumin caused a significant potentiation of currents induced by acetylcholine (ACh; 100 μM) with an EC50 value of 0.2 µM. The effect of curcumin was not dependent on the activation of G-proteins and protein kinases and did not involve Ca2+-dependent Cl- channels expressed endogenously in oocytes. Importantly, the extent of curcumin potentiation was enhanced significantly by decreasing ACh concentrations. Curcumin did not alter specific binding of [125I]α-bungarotoxin. In addition, curcumin attenuated nociceptive behavior in both tonic and visceral pain models without affecting motor and locomotor activity and without producing tolerance. Pharmacological and genetic approaches revealed that the antinociceptive effect of curcumin was mediated by α7-nACh receptors. Curcumin potentiated the antinociceptive effects of the α7-nACh receptor agonist N-(3R)-1-azabicyclo[2.2.2]oct-3-yl-4-chlorobenzamide (PNU282987). Collectively, our results indicate that curcumin is a positive allosteric modulator of α7-nACh receptor and reverses nociception in mouse models of tonic and visceral pain.
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Affiliation(s)
- Eslam Gaber El Nebrisi
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Deniz Bagdas
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Wisam Toma
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Halima Al Samri
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Anna Brodzik
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Yasmin Alkhlaif
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Keun-Hang Susan Yang
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Frank Christopher Howarth
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Imad M Damaj
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
| | - Murat Oz
- Departments of Pharmacology (E.G.E.N., H.A.S., M.O.) and Physiology (F.C.H.), College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia (D.B., W.T., A.B., Y.A., I.M.D.); Experimental Animals Breeding and Research Center, Faculty of Medicine, Uludag University, Bursa, Turkey (D.B.); Department of Biological Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, California (K.-H.S.Y.); and Department of Basic Medical Sciences, College of Medicine, Qatar University, Doha, Qatar (M.O.)
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