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See LP, Sripinun P, Lu W, Li J, Alboloushi N, Alvarez-Periel E, Lee SM, Karabucak B, Wang S, Jordan Sciutto KL, Theken KN, Mitchell CH. Increased Purinergic Signaling in Human Dental Pulps With Inflammatory Pain is Sex-Dependent. THE JOURNAL OF PAIN 2024; 25:1039-1058. [PMID: 37956743 PMCID: PMC11129867 DOI: 10.1016/j.jpain.2023.10.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 09/22/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023]
Abstract
An enhanced understanding of neurotransmitter systems contributing to pain transmission aids in drug development, while the identification of biological variables like age and sex helps in the development of personalized pain management and effective clinical trial design. This study identified enhanced expression of purinergic signaling components specifically in painful inflammation, with levels increased more in women as compared to men. Inflammatory dental pain is common and potentially debilitating; as inflammation of the dental pulp can occur with or without pain, it provides a powerful model to examine distinct pain pathways in humans. In control tissues, P2X3 and P2X2 receptors colocalized with PGP9.5-positive nerves. Expression of the ecto-nucleotidase NTPDase1 (CD39) increased with exposure to extracellular adenosine triphosphate (ATP), implying CD39 acted as a marker for sustained elevation of extracellular ATP. Both immunohistochemistry and immunoblots showed P2X2, P2X3, and CD39 increased in symptomatic pulpitis, suggesting receptors and the ATP agonist were elevated in patients with increased pain. The increased expression of P2X3 and CD39 was more frequently observed in women than men. In summary, this study identifies CD39 as a marker for chronic elevation of extracellular ATP in fixed human tissue. It supports a role for increased purinergic signaling in humans with inflammatory dental pain and suggests the contribution of purines shows sexual dimorphism. This highlights the potential for P2X antagonists to treat pain in humans and stresses the need to consider sex in clinical trials that target pain and purinergic pathways. PERSPECTIVE: This article demonstrates an elevation of ATP-marker CD39 and of ATP receptors P2X2 and P2X3 with inflammatory pain and suggests the rise is greater in women. This highlights the potential for P2X antagonists to treat pain and stresses the consideration of sexual dimorphism in studies of purines and pain.
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Affiliation(s)
- Lily P. See
- Departments of Basic and Translational Science, University of Pennsylvania, Philadelphia, PA 19104
- Department of Endodontics, University of Pennsylvania, Philadelphia, PA 19104
| | - Puttipong Sripinun
- Departments of Basic and Translational Science, University of Pennsylvania, Philadelphia, PA 19104
- Department of Orthodontics, University of Pennsylvania, Philadelphia, PA 19104
| | - Wennan Lu
- Departments of Basic and Translational Science, University of Pennsylvania, Philadelphia, PA 19104
| | - Jiaqi Li
- Departments of Basic and Translational Science, University of Pennsylvania, Philadelphia, PA 19104
| | - Naela Alboloushi
- Department of Endodontics, University of Pennsylvania, Philadelphia, PA 19104
- Department of Oral Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | | | - Su-Min Lee
- Department of Endodontics, University of Pennsylvania, Philadelphia, PA 19104
| | - Bekir Karabucak
- Department of Endodontics, University of Pennsylvania, Philadelphia, PA 19104
| | - Steven Wang
- Department of Oral Surgery, University of Pennsylvania, Philadelphia, PA 19104
| | | | - Katherine N. Theken
- Department of Oral Surgery, University of Pennsylvania, Philadelphia, PA 19104
| | - Claire H. Mitchell
- Departments of Basic and Translational Science, University of Pennsylvania, Philadelphia, PA 19104
- Department of Physiology, University of Pennsylvania, Philadelphia, PA 19104
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Cui X, Wei W, Zhang Z, Liu K, Zhao T, Zhang J, Zheng A, Xi H, He X, Wang S, Zhu B, Gao X. Caffeine Impaired Acupuncture Analgesia in Inflammatory Pain by Blocking Adenosine A1 Receptor. THE JOURNAL OF PAIN 2024; 25:1024-1038. [PMID: 37918469 DOI: 10.1016/j.jpain.2023.10.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 10/03/2023] [Accepted: 10/26/2023] [Indexed: 11/04/2023]
Abstract
Caffeine consumption inhibits acupuncture analgesic effects by blocking adenosine signaling. However, existing evidence remains controversial. Hence, this study aimed to examine the adenosine A1 receptor (A1R) role in moderate-dose caffeine-induced abolishing effect on acupuncture analgesia using A1R knockout mice (A1R-/-). We assessed the role of A1R in physiological sensory perception and its interaction with caffeine by measuring mechanical and thermal pain thresholds and administering A1R and adenosine 2A receptor antagonists in wild-type (WT) and A1R-/- mice. Formalin- and complete Freund's adjuvant (CFA)-induced inflammatory pain models were recruited to explore moderate-dose caffeine effect on pain perception and acupuncture analgesia in WT and A1R-/- mice. Moreover, a C-fiber reflex electromyogram in the biceps femoris was conducted to validate the role of A1R in the caffeine-induced blockade of acupuncture analgesia. We found that A1R was dispensable for physiological sensory perception and formalin- and CFA-induced hypersensitivity. However, genetic deletion of A1R impaired the antinociceptive effect of acupuncture in A1R-/- mice under physiological or inflammatory pain conditions. Acute moderate-dose caffeine administration induced mechanical and thermal hyperalgesia under physiological conditions but not in formalin- and CFA-induced inflammatory pain. Moreover, caffeine significantly inhibited electroacupuncture (EA) analgesia in physiological and inflammatory pain in WT mice, comparable to that of A1R antagonists. Conversely, A1R deletion impaired the EA analgesic effect and decreased the caffeine-induced inhibitory effect on EA analgesia in physiological conditions and inflammatory pain. Moderate-dose caffeine administration diminished the EA-induced antinociceptive effect by blocking A1R. Overall, our study suggested that caffeine consumption should be avoided during acupuncture treatment. PERSPECTIVE: Moderate-dose caffeine injection attenuated EA-induced antinociceptive effect in formalin- and CFA-induced inflammatory pain mice models by blocking A1R. This highlights the importance of monitoring caffeine intake during acupuncture treatment.
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Affiliation(s)
- Xiang Cui
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Wan Wei
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China; College of Acupuncture and Tuina, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi Province, China
| | - Ziyi Zhang
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Kun Liu
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Ting Zhao
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China; Department of Acupuncture, Shaanxi Provincial Hospital of Traditional Chinese Medicine, Xi'an, Shaanxi Province, China
| | - Jialin Zhang
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China; Department of Acupuncture, Yuncheng Hospital of Traditional Chinese Medicine, Yuncheng, Shanxi Province, China
| | - Ani Zheng
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China; Department of Acupuncture, Rehabilitation, Massage and Pain, The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi Province, China
| | - Hanqing Xi
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xun He
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Shuya Wang
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Bing Zhu
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xinyan Gao
- Department of Physiology, Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
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Arendt-Nielsen L, Klitgaard H, Hansen SN. Bridging the translational gap: adenosine as a modulator of neuropathic pain in preclinical models and humans. Scand J Pain 2024; 24:sjpain-2023-0048. [PMID: 38070164 DOI: 10.1515/sjpain-2023-0048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 11/22/2023] [Indexed: 12/22/2023]
Abstract
OBJECTIVES This review aims to analyse the published data on preclinical and human experimental and clinical adenosine modulation for pain management. We summarise the translatability of the adenosine pathway for further drug development and aim to reveal subgroups of pain patients that could benefit from targeting the pathway. CONTENT Chronic pain patients suffer from inadequate treatment options and drug development is generally impaired by the low translatability of preclinical pain models. Therefore, validating the predictability of drug targets is of high importance. Modulation of the endogenous neurotransmitter adenosine gained significant traction in the early 2000s but the drug development efforts were later abandoned. With the emergence of new drug modalities, there is a renewed interest in adenosine modulation in pain management. In both preclinical, human experimental and clinical research, enhancing adenosine signalling through the adenosine receptors, has shown therapeutic promise. A special focus has been on the A1 and A3 receptors both of which have shown great promise and predictive validity in neuropathic pain conditions. SUMMARY Adenosine modulation shows predictive validity across preclinical, human experimental and clinical investigations. The most compelling evidence is in the field of neuropathic pain, where adenosine has been found to alleviate hyperexcitability and has the potential to be disease-modifying. OUTLOOK Adenosine modulation show therapeutic potential in neuropathic pain if selective and safe drugs can be developed. New drug modalities such as RNA therapeutics and cell therapies may provide new options.
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Affiliation(s)
- Lars Arendt-Nielsen
- Department of Health Science and Technology, Center for Neuroplasticity and Pain, CNAP, School of Medicine, Aalborg University, Gistrup, Denmark
- Department of Gastroenterology & Hepatology, Mech-Sense, Clinical Institute, Aalborg University Hospital, Aalborg, Denmark
- Steno Diabetes Center North Denmark, Clinical Institute, Aalborg University Hospital, Aalborg, Denmark
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Shih YV, Kingsley D, Newman H, Hoque J, Gupta A, Lascelles BDX, Varghese S. Multi-Functional Small Molecule Alleviates Fracture Pain and Promotes Bone Healing. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303567. [PMID: 37939302 PMCID: PMC10754086 DOI: 10.1002/advs.202303567] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/21/2023] [Indexed: 11/10/2023]
Abstract
Bone injuries such as fractures are one major cause of morbidities worldwide. A considerable number of fractures suffer from delayed healing, and the unresolved acute pain may transition to chronic and maladaptive pain. Current management of pain involves treatment with NSAIDs and opioids with substantial adverse effects. Herein, we tested the hypothesis that the purine molecule, adenosine, can simultaneously alleviate pain and promote healing in a mouse model of tibial fracture by targeting distinctive adenosine receptor subtypes in different cell populations. To achieve this, a biomaterial-assisted delivery of adenosine is utilized to localize and prolong its therapeutic effect at the injury site. The results demonstrate that local delivery of adenosine inhibited the nociceptive activity of peripheral neurons through activation of adenosine A1 receptor (ADORA1) and mitigated pain as demonstrated by weight bearing and open field movement tests. Concurrently, local delivery of adenosine at the fracture site promoted osteogenic differentiation of mesenchymal stromal cells through adenosine A2B receptor (ADORA2B) resulting in improved bone healing as shown by histological analyses and microCT imaging. This study demonstrates the dual role of adenosine and its material-assisted local delivery as a feasible therapeutic approach to treat bone trauma and associated pain.
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Affiliation(s)
- Yu‐Ru V. Shih
- Department of Orthopaedic SurgeryDuke University School of MedicineDurhamNC27710USA
| | - David Kingsley
- Department of Orthopaedic SurgeryDuke University School of MedicineDurhamNC27710USA
| | - Hunter Newman
- Department of Mechanical Engineering and Materials ScienceDuke UniversityDurhamNC27710USA
| | - Jiaul Hoque
- Department of Orthopaedic SurgeryDuke University School of MedicineDurhamNC27710USA
| | - Ankita Gupta
- Translational Research in Pain ProgramDepartment of Clinical SciencesCollege of Veterinary MedicineNorth Carolina State UniversityRaleighNC27607USA
| | - B. Duncan X. Lascelles
- Translational Research in Pain ProgramDepartment of Clinical SciencesCollege of Veterinary MedicineNorth Carolina State UniversityRaleighNC27607USA
- Thurston Arthritis CenterUniversity of North Carolina School of MedicineChapel HillNC27599USA
- Center for Translational Pain MedicineDepartment of AnesthesiologyDuke University School of MedicineDurhamNC27710USA
- Comparative Pain Research and Education CenterCollege of Veterinary MedicineNorth Carolina State UniversityRaleighNC27607USA
| | - Shyni Varghese
- Department of Orthopaedic SurgeryDuke University School of MedicineDurhamNC27710USA
- Department of Mechanical Engineering and Materials ScienceDuke UniversityDurhamNC27710USA
- Department of Biomedical EngineeringDuke UniversityDurhamNC27710USA
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5
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Haddad M, Cherchi F, Alsalem M, Al-saraireh YM, Madae’en S. Adenosine Receptors as Potential Therapeutic Analgesic Targets. Int J Mol Sci 2023; 24:13160. [PMID: 37685963 PMCID: PMC10487796 DOI: 10.3390/ijms241713160] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/18/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023] Open
Abstract
Pain represents an international burden and a major socio-economic public health problem. New findings, detailed in this review, suggest that adenosine plays a significant role in neuropathic and inflammatory pain, by acting on its metabotropic adenosine receptors (A1AR, A2AAR, A2BAR, A3AR). Adenosine receptor ligands have a practical translational potential based on the favorable efficacy and safety profiles that emerged from clinical research on various agonists and antagonists for different pathologies. The present review collects the latest studies on selected adenosine receptor ligands in different pain models. Here, we also covered the many hypothesized pathways and the role of newly synthesized allosteric adenosine receptor modulators. This review aims to present a summary of recent research on adenosine receptors as prospective therapeutic targets for a range of pain-related disorders.
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Affiliation(s)
- Mansour Haddad
- Faculty of Pharmacy, Yarmouk University, Irbid 21163, Jordan
| | - Federica Cherchi
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Section of Pharmacology and Toxicology, University of Florence, 50139 Florence, Italy;
| | - Mohammad Alsalem
- School of Medicine, The University of Jordan, Amman 11942, Jordan;
| | - Yousef M. Al-saraireh
- Department of Pharmacology, Faculty of Medicine, Mutah University, P.O. Box 7, Al-Karak 61710, Jordan;
| | - Saba Madae’en
- Department of Clinical Pharmacy and Pharmacy Practice, Faculty of Pharmaceutical Sciences, The Hashemite University, Zarqa 13133, Jordan;
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Zhou M, Wu J, Chang H, Fang Y, Zhang D, Guo Y. Adenosine signaling mediate pain transmission in the central nervous system. Purinergic Signal 2023; 19:245-254. [PMID: 35000074 PMCID: PMC9984632 DOI: 10.1007/s11302-021-09826-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 10/29/2021] [Indexed: 12/14/2022] Open
Abstract
Pain is a common clinical symptom that seriously affects the quality of life in a variety of patient populations. In recent years, research on the role of adenosine signaling in pain modulation has made great progress. Adenosine is a purine nucleoside and a neuromodulator, and regulates multiple physiological and pathophysiological functions through the activation of four G protein-coupled receptors, which are classified as A1, A2A, A2B, and A3 adenosine receptors (ARs). Adenosine and its receptors that are widespread in the central nervous system (CNS) play an important role in the processing of nociceptive sensory signals in different pain models. A1Rs have the highest affinity to adenosine, and the role in analgesia has been well investigated. The roles of A2ARs and A2BRs in the modulation of pain are controversial because they have both analgesic and pronociceptive effects. The analgesic effects of A3Rs are primarily manifested in neuropathic pain. In this article, we have reviewed the recent studies on ARs in the modulation of neuropathic pain, inflammatory pain, postoperative pain, and visceral pain in the CNS. Furthermore, we have outlined the pathways through which ARs contribute to pain regulation, thereby shedding light on how this mechanism can be targeted to provide effective pain relief.
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Affiliation(s)
- Mengmeng Zhou
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Jinrong Wu
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Hongen Chang
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Yuxin Fang
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China.
| | - Di Zhang
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China.
| | - Yi Guo
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China. .,College of Chinese Medical, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China.
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7
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Haddad M, Alsalem M, Aldossary SA, Kalbouneh H, Jaffal SM, Alshawabkeh Q, Al Hayek S, Abdelhai O, Barakat NA, El-Salem K. The role of adenosine receptor ligands on inflammatory pain: possible modulation of TRPV1 receptor function. Inflammopharmacology 2023; 31:337-347. [PMID: 36580157 DOI: 10.1007/s10787-022-01127-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 12/20/2022] [Indexed: 12/30/2022]
Abstract
Chronic pain has a debilitating consequences on health and lifestyle. The currently available analgesics are often ineffective and accompanied by undesirable adverse effects. Although adenosine receptors (AR) activation can affect nociceptive, inflammatory, and neuropathic pain states, the specific regulatory functions of its subtypes (A1, A2A, A2B and A3 ARs) are not fully understood. The aim of this study was to investigate the role of different AR ligands on inflammatory pain. The von Frey filament test was used to assess the anti-nociceptive effects of adenosine ligands on Complete Freund's Adjuvant (CFA)-induced mechanical allodynia in (180-220 g) adult male Sprague Dawley rats (expressed as paw withdrawal threshold, PWT). Neither the A2AAR selective agonist CGS 21680 hydrochloride (0.1, 0.32 and 1 mg/kg) nor the A2BAR selective agonist BAY 60-6583 (0.1, 0.32 and 1 mg/kg) produced any significant reversal of the PWT. However, the A1AR selective agonist ( ±)-5'-Chloro-5'-deoxy-ENBA, the A3AR selective agonist 2-Cl-IB-MECA, the A2AAR selective antagonist ZM 241385 and the A2BAR selective antagonist PSB 603 produced a significant reversal of the PWT at the highest dose of 1 mg/kg. Co-administration of the selective antagonists of A1AR and A3AR PSB36 (1 mg/ml) and MRS-3777 (1 mg/ml); respectively, significantly reversed the anti-nociceptive effects of their corresponding agonists. Furthermore, calcium imaging studies reveled that the effective AR ligands in the behavioral assay also significantly inhibit capsaicin-evoked calcium responses in cultured rat dorsal root ganglia (DRG) neurons. In conclusion, modulating the activity of the transient receptor potential vanilloid 1 (TRPV1) receptor by ARs ligands could explain their anti-nociceptive effects observed in vivo. Therefore, the cross talk between ARs and TRPV1 receptor may represent a promising targets for the treatment of inflammatory pain conditions.
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Affiliation(s)
- Mansour Haddad
- Faculty of Pharmacy, Yarmouk University, Irbid, 21163, Jordan.
| | - Mohammad Alsalem
- School of Medicine, The University of Jordan, Amman, 11942, Jordan
| | - Sara A Aldossary
- Faculty of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Heba Kalbouneh
- School of Medicine, The University of Jordan, Amman, 11942, Jordan
| | - Sahar M Jaffal
- Biological Sciences, Faculty of Science, The University of Jordan, Amman, 11942, Jordan
| | | | - Sa'ed Al Hayek
- School of Medicine, The University of Jordan, Amman, 11942, Jordan
| | - Omar Abdelhai
- Al Khalidi Hospital and Medical Center, Ibn Khaldon St.39, Amman, Jordan
| | - Noor A Barakat
- School of Medicine, The University of Jordan, Amman, 11942, Jordan
| | - Khalid El-Salem
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan
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Hao JW, Qiao WL, Li Q, Wei S, Li XM, Liu TT, Qiu CY, Hu WP. A1 Adenosine Receptor Activation Inhibits P2X3 Receptor-Mediated ATP Currents in Rat Dorsal Root Ganglion Neurons. Mol Neurobiol 2022; 59:7025-7035. [PMID: 36074232 DOI: 10.1007/s12035-022-03019-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 08/26/2022] [Indexed: 10/14/2022]
Abstract
Purinergic signaling is involved in multiple pain processes. P2X3 receptor is a key target in pain therapeutics, while A1 adenosine receptor signaling plays a role in analgesia. However, it remains unclear whether there is a link between them in pain. The present results showed that the A1 adenosine receptor agonist N6-cyclopentyladenosine (CPA) concentration dependently suppressed P2X3 receptor-mediated and α,β-methylene-ATP (α,β-meATP)-evoked inward currents in rat dorsal root ganglion (DRG) neurons. CPA significantly decreased the maximal current response to α,β-meATP, as shown a downward shift of the concentration-response curve for α,β-meATP. CPA suppressed ATP currents in a voltage-independent manner. Inhibition of ATP currents by CPA was completely prevented by the A1 adenosine receptor antagonist KW-3902, and disappeared after the intracellular dialysis of either the Gi/o protein inhibitor pertussis toxin, the adenylate cyclase activator forskolin, or the cAMP analog 8-Br-cAMP. Moreover, CPA suppressed the membrane potential depolarization and action potential bursts, which were induced by α,β-meATP in DRG neurons. Finally, CPA relieved α,β-meATP-induced nociceptive behaviors in rats by activating peripheral A1 adenosine receptors. These results indicated that CPA inhibited the activity of P2X3 receptors in rat primary sensory neurons by activating A1 adenosine receptors and its downstream cAMP signaling pathway, revealing a novel peripheral mechanism underlying its analgesic effect.
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Affiliation(s)
- Jia-Wei Hao
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China.,School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Wen-Long Qiao
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China.,School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Qing Li
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China.,School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Shuang Wei
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China.,School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Xue-Mei Li
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Ting-Ting Liu
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Chun-Yu Qiu
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China
| | - Wang-Ping Hu
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, People's Republic of China. .,Hubei College of Chinese Medicine, 87 Xueyuan Road, Jingzhou, 434020, Hubei, People's Republic of China.
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9
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Targeting G protein coupled receptors for alleviating neuropathic pain. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2022; 193:99-117. [PMID: 36357081 DOI: 10.1016/bs.pmbts.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Pain sensation is a normal physiological response to alert and prevent further tissue damage. It involves the perception of external stimuli by somatosensory neurons, then transmission of the message to various other types of neurons present in the spinal cord and brain to generate an appropriate response. Currently available analgesics exhibit very modest efficacy, and that too in only a subset of patients with chronic pain conditions, particularly neuropathic pain. The G protein-coupled receptors (GPCRs) are expressed on presynaptic, postsynaptic terminals, and soma of somatosensory neurons, which binds to various types of ligands to modulate neuronal activity and thus pain sensation in both directions. Fundamentally, neuropathic pain arises due to aberrant neuronal plasticity, which includes the sensitization of peripheral primary afferents (dorsal root ganglia and trigeminal ganglia) and the sensitization of central nociceptive neurons in the spinal cord or trigeminal nucleus or brain stem and cortex. Owing to the expression profiles of GPCRs in somatosensory neurons and other neuroanatomical regions involved in pain processing and transmission, this article shall focus only on four families of GPCRs: 1- Opioid receptors, 2-Cannabinoid receptors, 3-Adenosine receptors, and 4-Chemokine receptors.
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10
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Abouelfetouh MM, Salah E, Liu L, Ding M, Ding Y. Intrathecal adenosine enhances the antinociception of Xylazine in goats. BMC Vet Res 2022; 18:105. [PMID: 35300701 PMCID: PMC8928627 DOI: 10.1186/s12917-022-03193-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 02/14/2022] [Indexed: 11/25/2022] Open
Abstract
Background The role of adenosine (AD) in neuromodulation of nociceptive signaling at the level of the spinal cord has been established in both preclinical and clinical models. Recently, the signaling pathway that involves adenosine 5-monophosphate activated protein kinase has been reported to mediate the antinociceptive effects of xylazine (XYL). The objective of this study was to investigate the antinociceptive, cardiorespiratory and hematological effects of intrathecal administration of combined XYL-AD in goats as compared to XYL alone. Six clinically healthy adult goats weighing 25 ± 2 kg were randomly assigned to one of three groups in a cross-over design. Goats were sedated with XYL (0.05 mg/kg, IM) in all groups. Ten min later, 0.9% saline solution [SAL group], XYL (0.05 mg/kg) [XYL group] or a combination of XYL (0.05 mg/kg) and AD (2000 µg) [XYL-AD group] was injected intrathecally. Antinociception scores and both cardiorespiratory and hematological parameters were measured before XYL sedation and intrathecal injection (baseline), and at 5, 10, 15, 30, 60, 90, 120 and 150 min thereafter. Results The XYL-AD group showed significantly earlier onset of antinociception [5 (5–7) min] than XYL [13 (12–14.25] min (P = 0.031). The duration of complete antinociception in goats that received XYL-AD was significantly longer (P = 0.031) than that received XYL alone [65 (58.75–66.25) and 47.5 (43.75–51.25) min, respectively]. In both XYL and XYL-AD groups, heart rate (HR), arterial blood pressure (SAP, MAP and DAP) were significantly decreased (P < 0.05) compared to the baseline. Compared to the SAL group, a statistically significant reduction in HR from 10 to 150 min (P < 0.05) was detected in the XYL group contrary to the XYL-AD group. Differences in the hematological parameters among different groups were insignificant. Conclusions AD injected intrathecally interacts synergistically with XYL to promote antinociception in goats. This discovery supports the use of AD in combination with XYL in clinical trials.
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Affiliation(s)
- Mahmoud M Abouelfetouh
- College of Veterinary Medicine, Huazhong Agricultural University, No.1, Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, China.,Department of Surgery, Radiology and Anaesthesiology, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, 13736, Egypt
| | - Eman Salah
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.,Department of Pharmacology, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, 13736, Egypt
| | - Lingling Liu
- College of Veterinary Medicine, Huazhong Agricultural University, No.1, Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, China.,Clinical Veterinary Laboratory, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou, 450046, Henan Province, China
| | - Mingxing Ding
- College of Veterinary Medicine, Huazhong Agricultural University, No.1, Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, China
| | - Yi Ding
- College of Veterinary Medicine, Huazhong Agricultural University, No.1, Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, China.
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11
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Jung SM, Peyton L, Essa H, Choi DS. Adenosine receptors: Emerging non-opioids targets for pain medications. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2022; 11:100087. [PMID: 35372716 PMCID: PMC8971635 DOI: 10.1016/j.ynpai.2022.100087] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 11/16/2022]
Abstract
Physical and emotional pain deteriorates the quality of well-being. Also, numerous non-invasive and invasive treatments for diagnosed diseases such as cancer medications and surgical procedures cause various types of pain. Despite the multidisciplinary approaches available to manage pain, the unmet needs for medication with minimal side effects are substantial. Especially with the surge of opioid crisis during the last decades, non-opioid analgesics may reduce life-threatening overdosing and addictive liability. Although many clinical trials supported the potential potency of cannabis and cannabidiol (CBD) in pain management or treatment, the long-term benefits of cannabis or CBD are still not evident. At the same time, growing evidence shows the risk of overusing cannabis and CBD. Therefore, it is urgent to develop novel analgesic medications that minimize side effects. All four well-identified adenosine receptors, A1, A2A, A2B, and A3, are implicated in pain. Recently, a report demonstrated that an adenosine A1R-specific positive allosteric modulator (PAM) is a potent analgesic without noticeable side effects. Also, several A3R agonists are being considered as promising analgesic agent. However, the importance of adenosine in pain is relatively underestimated. To help readers understand, first, we will summarize the historical perspective of the adenosine system in preclinical and clinical studies. Then, we will discuss possible interactions of adenosine and opioids or the cannabis system focusing on pain. Overall, this review will provide the potential role of adenosine and adenosine receptors in pain treatment.
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Affiliation(s)
- Soo-Min Jung
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine and Science, Rochester, MN, United States
| | - Lee Peyton
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine and Science, Rochester, MN, United States
| | - Hesham Essa
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine and Science, Rochester, MN, United States
| | - Doo-Sup Choi
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine and Science, Rochester, MN, United States.,Neuroscience Program, Mayo Clinic College of Medicine and Science, Rochester, MN, United States.,Department of Psychiatry and Psychology, Mayo Clinic College of Medicine and Science, Rochester, MN, United States
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12
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Kouraki A, Doherty M, Fernandes GS, Zhang W, Walsh DA, Kelly A, Valdes AM. Different genes may be involved in distal and local sensitisation: a genome-wide gene-based association study and meta-analysis. Eur J Pain 2021; 26:740-753. [PMID: 34958702 PMCID: PMC9303629 DOI: 10.1002/ejp.1902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 11/11/2021] [Accepted: 12/25/2021] [Indexed: 11/22/2022]
Abstract
Background Neuropathic pain symptoms and signs of increased pain sensitization in osteoarthritis (OA) patients may explain persistent pain after total joint replacement (TJR). Therefore, identifying genetic markers associated with pain sensitization and neuropathic‐like pain phenotypes could be clinically important in identifying targets for early intervention. Methods We performed a genome‐wide gene‐based association study (GWGAS) using pressure pain detection thresholds (PPTs) from distal pain‐free sites (anterior tibia), a measure of distal sensitization, and from proximal pain‐affected sites (lateral joint line), a measure of local sensitization, in 320 knee OA participants from the Knee Pain and related health in the Community (KPIC) cohort. We next performed gene‐based fixed‐effects meta‐analysis of PPTs and a neuropathic‐like pain phenotype using genome‐wide association study (GWAS) data from KPIC and from an independent cohort of 613 post‐TJR participants, respectively. Results The most significant genes associated with distal and local sensitization were OR5B3 and BRDT, respectively. We also found previously identified neuropathic pain‐associated genes—KCNA1, MTOR, ADORA1 and SCN3B—associated with PPT at the anterior tibia and an inflammatory pain gene—PTAFR—associated with PPT at the lateral joint line. Meta‐analysis results of anterior tibia and neuropathic‐like pain phenotypes revealed genes associated with bone morphogenesis, neuro‐inflammation, obesity, type 2 diabetes, cardiovascular disease and cognitive function. Conclusions Overall, our results suggest that different biological processes might be involved in distal and local sensitization, and common genetic mechanisms might be implicated in distal sensitization and neuropathic‐like pain. Future studies are needed to replicate these findings. Significance To the best of our knowledge, this is the first GWAS for pain sensitization and the first gene‐based meta‐analysis of pain sensitization and neuropathic‐like pain. Higher pain sensitization and neuropathic pain symptoms are associated with persistent pain after surgery hence, identifying genetic biomarkers and molecular pathways associated with these traits is clinically relevant.
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Affiliation(s)
- A Kouraki
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, NG5 1PB, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG5 1PB, United Kingdom
| | - M Doherty
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, NG5 1PB, United Kingdom.,Pain Centre Versus Arthritis, University of Nottingham, Nottingham, NG5 1PB, United Kingdom.,Versus Arthritis Centre for Sports, Exercise and Osteoarthritis, University of Nottingham, Nottingham, NG7 2UH, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG5 1PB, United Kingdom
| | - G S Fernandes
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, BS1 6EH, United Kingdom
| | - W Zhang
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, NG5 1PB, United Kingdom.,Pain Centre Versus Arthritis, University of Nottingham, Nottingham, NG5 1PB, United Kingdom.,Versus Arthritis Centre for Sports, Exercise and Osteoarthritis, University of Nottingham, Nottingham, NG7 2UH, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG5 1PB, United Kingdom
| | - D A Walsh
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, NG5 1PB, United Kingdom.,Pain Centre Versus Arthritis, University of Nottingham, Nottingham, NG5 1PB, United Kingdom.,Versus Arthritis Centre for Sports, Exercise and Osteoarthritis, University of Nottingham, Nottingham, NG7 2UH, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG5 1PB, United Kingdom
| | - A Kelly
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, NG5 1PB, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG5 1PB, United Kingdom
| | - A M Valdes
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham City Hospital, Nottingham, NG5 1PB, United Kingdom.,Pain Centre Versus Arthritis, University of Nottingham, Nottingham, NG5 1PB, United Kingdom.,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, NG5 1PB, United Kingdom
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13
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Wei S, Hao JW, Qiao WL, Li Q, Liu TT, Qiu CY, Hu WP. Suppression of ASIC activity by the activation of A1 adenosine receptors in rat primary sensory neurons. Neuropharmacology 2021; 205:108924. [PMID: 34919904 DOI: 10.1016/j.neuropharm.2021.108924] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/21/2021] [Accepted: 12/10/2021] [Indexed: 11/25/2022]
Abstract
Peripheral A1 adenosine receptor signaling has been shown to have analgesic effects in a variety of pain conditions. However, it is not yet fully elucidated for the precise molecular mechanisms. Acid sensing ion channels (ASICs) are expressed predominantly in nociceptive sensory neurons responding to protons. Given that both A1 adenosine receptors and ASICs are present in dorsal root ganglia (DRG) neurons, we therefore investigated whether there was a cross-talk between the two types of receptors. Herein, electrophysiological recordings showed that the A1 adenosine receptor agonist N6-cyclopentyladenosine (CPA) suppressed acid-induced currents and action potentials, which were mediated by ASICs, in rat DRG neurons. CPA inhibited the maximum response to protons, as shown a downward shift of concentration-response curve for protons. The CPA-induced suppression of ASIC currents was blocked by the A1 adenosine receptor antagonist KW-3902 and also prevented by intracellular application of the Gi/o-protein inhibitor pertussis toxin, the adenylate cyclase activator forskolin, and the cAMP analog 8-Br-cAMP. Finally, intraplantar pretreatment of CPA dose-dependently relieved acid-induced nociceptive responses in rats through peripheral A1 adenosine receptors. These results suggested that CPA suppressed ASICs via A1 adenosine receptors and intracellular Gi/o-proteins and cAMP signaling cascades in rat DRG neurons, which was a novel potential mechanism underlying analgesia of peripheral A1 adenosine receptors.
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Affiliation(s)
- Shuang Wei
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China
| | - Jia-Wei Hao
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China
| | - Wen-Long Qiao
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China
| | - Qing Li
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China
| | - Ting-Ting Liu
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China
| | - Chun-Yu Qiu
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China
| | - Wang-Ping Hu
- School of Basic Medical Sciences, Xianning Medical College, Hubei University of Science and Technology, 88 Xianning Road, Xianning, 437100, Hubei, PR China; Hubei College of Chinese Medicine, 87 Xueyuan Road, Jingzhou, 434020, Hubei, PR China.
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14
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Obese E, Biney RP, Henneh IT, Anokwah D, Adakudugu EA, Woode E, Ameyaw EO. Antinociceptive effect of the hydroethanolic leaf extract of Calotropis procera (Ait) R. Br. (Apocynaceae): Possible involvement of glutamatergic, cytokines, opioidergic and adenosinergic pathways. JOURNAL OF ETHNOPHARMACOLOGY 2021; 278:114261. [PMID: 34111540 DOI: 10.1016/j.jep.2021.114261] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 05/12/2021] [Accepted: 05/25/2021] [Indexed: 05/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Pain remains real and still a major problem in clinical medicine which requires new agents with improved efficacy for more therapeutic benefits. Plant sources can serve as a basis for the search for some novel drugs hence the analgesic effects of the hydroethanolic extract of Calotropis procera (CPE) which is widespread in Ghana and other tropical areas and used in folkloric medicine for painful and inflammatory conditions was evaluated. MATERIALS AND METHODS The analgesic properties of orally administered CPE at doses of 30, 100, and 300 mg/kg were evaluated in thermal (tail immersion), chemical (acetic acid-writhing, formalin-induced paw licking, glutamate-induced nociception) and mechanical (Randall-Selitto) tests for analgesia. The involvement of tumour necrosis factor-alpha (TNF-α), interleukin 1β (IL 1β), bradykinin, and prostaglandin E2 (PGE2) on the analgesic effects of CPE were also evaluated in hypernociception assays measuring mechanical pain thresholds. RESULTS The latency of tail withdrawal in the tail immersion test was significantly increased (p = 0.0001) while writhing induced by acetic acid was significantly reduced (p < 0.0001) on treatment with CPE (30-300 mg/kg). The extract also significantly inhibited both phase 1 and phase 2 nociceptive states induced by formalin comparable to morphine (p < 0.0001). Furthermore, the extract significantly attenuated hyper-nociception induced by TNF-α (p < 0.0001), interleukin 1β (p = 0.0102), bradykinin (p < 0.0001), and prostaglandin E2 (p < 0.0001). Additionally, glutamate-induced paw licking was reduced significantly (p < 0.05). The antinociceptive effects exhibited by CPE (100 mg/kg) in the formalin test was reversed by systemic administration of naloxone (2 mg/kg) and theophylline (5 mg/kg) but not glibenclamide (8 mg/kg), granisetron (2 mg/kg), atropine (3 mg/kg), yohimbine (3 mg/kg, p.o.) nor nifedipine (10 mg/kg). CONCLUSION Overall, the hydroethanolic leaf extract of Calotropis procera possesses analgesic properties that is mediated possibly through the glutaminergic, opioidergic, and adenosinergic pathways.
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Affiliation(s)
- Ernest Obese
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Robert P Biney
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Isaac T Henneh
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Daniel Anokwah
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Emmanuel A Adakudugu
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Eric Woode
- Department of Pharmacology, School of Pharmacy, University of Health and Allied Sciences, Ho, Ghana
| | - Elvis O Ameyaw
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana.
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15
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Metzner K, Gross T, Balzulat A, Wack G, Lu R, Schmidtko A. Lack of efficacy of a partial adenosine A1 receptor agonist in neuropathic pain models in mice. Purinergic Signal 2021; 17:503-514. [PMID: 34313915 PMCID: PMC8410902 DOI: 10.1007/s11302-021-09806-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 06/28/2021] [Indexed: 12/25/2022] Open
Abstract
Previous studies suggest that adenosine A1 receptors (A1R) modulate the processing of pain. The aim of this study was to characterize the distribution of A1R in nociceptive tissues and to evaluate whether targeting A1R with the partial agonist capadenoson may reduce neuropathic pain in mice. The cellular distribution of A1R in dorsal root ganglia (DRG) and the spinal cord was analyzed using fluorescent in situ hybridization. In behavioral experiments, neuropathic pain was induced by spared nerve injury or intraperitoneal injection of paclitaxel, and tactile hypersensitivities were determined using a dynamic plantar aesthesiometer. Whole-cell patch-clamp recordings were performed to assess electrophysiological properties of dissociated DRG neurons. We found A1R to be expressed in populations of DRG neurons and dorsal horn neurons involved in the processing of pain. However, administration of capadenoson at established in vivo doses (0.03–1.0 mg/kg) did not alter mechanical hypersensitivity in the spared nerve injury and paclitaxel models of neuropathic pain, whereas the standard analgesic pregabalin significantly inhibited the pain behavior. Moreover, capadenoson failed to affect potassium currents in DRG neurons, in contrast to a full A1R agonist. Despite expression of A1R in nociceptive neurons, our data do not support the hypothesis that pharmacological intervention with partial A1R agonists might be a valuable approach for the treatment of neuropathic pain.
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Affiliation(s)
- Katharina Metzner
- Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany.
| | - Tilman Gross
- Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Annika Balzulat
- Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Gesine Wack
- Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Ruirui Lu
- Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Achim Schmidtko
- Institute of Pharmacology and Clinical Pharmacy, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
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16
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Leduc-Pessah H, Xu C, Fan CY, Dalgarno R, Kohro Y, Sparanese S, Burke NN, Jacobson KA, Altier C, Salvemini D, Trang T. Spinal A 3 adenosine receptor activation acutely restores morphine antinociception in opioid tolerant male rats. J Neurosci Res 2021; 100:251-264. [PMID: 34075613 DOI: 10.1002/jnr.24869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 04/20/2021] [Accepted: 05/12/2021] [Indexed: 01/01/2023]
Abstract
Opioids are potent analgesics, but their pain-relieving effects diminish with repeated use. The reduction in analgesic potency is a hallmark of opioid analgesic tolerance, which hampers opioid pain therapy. In the central nervous system, opioid analgesia is critically modulated by adenosine, a purine nucleoside implicated in the beneficial and detrimental actions of opioid medications. Here, we focus on the A3 adenosine receptor (A3 AR) in opioid analgesic tolerance. Intrathecal administration of the A3 AR agonist MRS5698 with daily systemic morphine in male rats attenuated the reduction in morphine antinociception over 7 days. In rats with established morphine tolerance, intrathecal MRS5698 partially restored the antinociceptive effects of morphine. However, when MRS5698 was discontinued, these animals displayed a reduced antinociceptive response to morphine. Our results suggest that MRS5698 acutely and transiently potentiates morphine antinociception in tolerant rats. By contrast, in morphine-naïve rats MRS5698 treatment did not impact thermal nociceptive threshold or affect antinociceptive response to a single injection of morphine. Furthermore, we found that morphine-induced adenosine release in cerebrospinal fluid was blunted in tolerant animals, but total spinal A3 AR expression was not affected. Collectively, our findings indicate that spinal A3 AR activation acutely potentiates morphine antinociception in the opioid tolerant state.
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Affiliation(s)
- Heather Leduc-Pessah
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Cynthia Xu
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Churmy Y Fan
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Rebecca Dalgarno
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Yuta Kohro
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Sydney Sparanese
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Nikita N Burke
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Kenneth A Jacobson
- National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD, USA
| | - Christophe Altier
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Daniela Salvemini
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, St. Louis, MO, USA.,Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Tuan Trang
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, AB, Canada.,Department of Physiology & Pharmacology, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
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17
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Abstract
Extracellular nucleosides and nucleotides have widespread functions in responding to physiological stress. The "purinome" encompasses 4 G-protein-coupled receptors (GPCRs) for adenosine, 8 GPCRs activated by nucleotides, 7 adenosine 5'-triphosphate-gated P2X ion channels, as well as the associated enzymes and transporters that regulate native agonist levels. Purinergic signaling modulators, such as receptor agonists and antagonists, have potential for treating chronic pain. Adenosine and its analogues potently suppress nociception in preclinical models by activating A1 and/or A3 adenosine receptors (ARs), but safely harnessing this pathway to clinically treat pain has not been achieved. Both A2AAR agonists and antagonists are efficacious in pain models. Highly selective A3AR agonists offer a novel approach to treat chronic pain. We have explored the structure activity relationship of nucleoside derivatives at this subtype using a computational structure-based approach. Novel A3AR agonists for pain control containing a bicyclic ring system (bicyclo [3.1.0] hexane) in place of ribose were designed and screened using an in vivo phenotypic model, which reflected both pharmacokinetic and pharmacodynamic parameters. High specificity (>10,000-fold selective for A3AR) was achieved with the aid of receptor homology models based on related GPCR structures. These A3AR agonists are well tolerated in vivo and highly efficacious in models of chronic neuropathic pain. Furthermore, signaling molecules acting at P2X3, P2X4, P2X7, and P2Y12Rs play critical roles in maladaptive pain neuroplasticity, and their antagonists reduce chronic or inflammatory pain, and, therefore, purine receptor modulation is a promising approach for future pain therapeutics. Structurally novel antagonists for these nucleotide receptors were discovered recently.
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18
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Luongo L, Guida F, Maione S, Jacobson KA, Salvemini D. Adenosine Metabotropic Receptors in Chronic Pain Management. Front Pharmacol 2021; 12:651038. [PMID: 33935761 PMCID: PMC8085424 DOI: 10.3389/fphar.2021.651038] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/22/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Livio Luongo
- Division of Pharmacology, Department of Experimental Medicine, Università della Campania "L. Vanvitelli", Caserta, Italy.,IRCSS, Neuromed, Pozzilli, Italy
| | - Francesca Guida
- Division of Pharmacology, Department of Experimental Medicine, Università della Campania "L. Vanvitelli", Caserta, Italy
| | - Sabatino Maione
- Division of Pharmacology, Department of Experimental Medicine, Università della Campania "L. Vanvitelli", Caserta, Italy.,IRCSS, Neuromed, Pozzilli, Italy
| | - Kenneth A Jacobson
- Laboratory of Bioorganic Chemistry, NIDDK, National Institutes of Health, Bethesda, MD, United States
| | - Daniela Salvemini
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, St. Louis, MO, United States
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19
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Lopes CR, Lourenço VS, Tomé ÂR, Cunha RA, Canas PM. Use of knockout mice to explore CNS effects of adenosine. Biochem Pharmacol 2020; 187:114367. [PMID: 33333075 DOI: 10.1016/j.bcp.2020.114367] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 12/11/2022]
Abstract
The initial exploration using pharmacological tools of the role of adenosine receptors in the brain, concluded that adenosine released as such acted on A1R to inhibit excitability and glutamate release from principal neurons throughout the brain and that adenosine A2A receptors (A2AR) were striatal-'specific' receptors controlling dopamine D2R. This indicted A1R as potential controllers of neurodegeneration and A2AR of psychiatric conditions. Global knockout of these two receptors questioned the key role of A1R and instead identified extra-striatal A2AR as robust controllers of neurodegeneration. Furthermore, transgenic lines with altered metabolic sources of adenosine revealed a coupling of ATP-derived adenosine to activate A2AR and a role of A1R as a hurdle to initiate neurodegeneration. Additionally, cell-selective knockout of A2AR unveiled the different roles of A2AR in different cell types (neurons/astrocytes) in different portions of the striatal circuits (dorsal versus lateral) and in different brain areas (hippocampus/striatum). Finally, a new transgenic mouse line with deletion of all adenosine receptors seems to indicate a major allostatic rather than homeostatic role of adenosine and may allow isolating P2R-mediated responses to unravel their role in the brain, a goal close to heart of Geoffrey Burnstock, to whom we affectionately dedicate this review.
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Affiliation(s)
- Cátia R Lopes
- CNC- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Vanessa S Lourenço
- CNC- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Ângelo R Tomé
- CNC- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, 3000-456 Coimbra, Portugal
| | - Rodrigo A Cunha
- CNC- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - Paula M Canas
- CNC- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
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Shaw S, Uniyal A, Gadepalli A, Tiwari V, Belinskaia DA, Shestakova NN, Venugopala KN, Deb PK, Tiwari V. Adenosine receptor signalling: Probing the potential pathways for the ministration of neuropathic pain. Eur J Pharmacol 2020; 889:173619. [DOI: 10.1016/j.ejphar.2020.173619] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/05/2020] [Accepted: 09/29/2020] [Indexed: 12/27/2022]
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Targeting Adenosine Receptors: A Potential Pharmacological Avenue for Acute and Chronic Pain. Int J Mol Sci 2020; 21:ijms21228710. [PMID: 33218074 PMCID: PMC7698931 DOI: 10.3390/ijms21228710] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022] Open
Abstract
Adenosine is a purine nucleoside, responsible for the regulation of multiple physiological and pathological cellular and tissue functions by activation of four G protein-coupled receptors (GPCR), namely A1, A2A, A2B, and A3 adenosine receptors (ARs). In recent years, extensive progress has been made to elucidate the role of adenosine in pain regulation. Most of the antinociceptive effects of adenosine are dependent upon A1AR activation located at peripheral, spinal, and supraspinal sites. The role of A2AAR and A2BAR is more controversial since their activation has both pro- and anti-nociceptive effects. A3AR agonists are emerging as promising candidates for neuropathic pain. Although their therapeutic potential has been demonstrated in diverse preclinical studies, no AR ligands have so far reached the market. To date, novel pharmacological approaches such as adenosine regulating agents and allosteric modulators have been proposed to improve efficacy and limit side effects enhancing the effect of endogenous adenosine. This review aims to provide an overview of the therapeutic potential of ligands interacting with ARs and the adenosinergic system for the treatment of acute and chronic pain.
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Diao XT, Yao L, Ma JJ, Zhang TY, Bai HH, Suo ZW, Yang X, Hu XD. Analgesic action of adenosine A1 receptor involves the dephosphorylation of glycine receptor α1ins subunit in spinal dorsal horn of mice. Neuropharmacology 2020; 176:108219. [DOI: 10.1016/j.neuropharm.2020.108219] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 06/10/2020] [Accepted: 06/19/2020] [Indexed: 01/18/2023]
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Adenosine A1 receptor agonist induces visceral antinociception via 5-HT1A, 5-HT2A, dopamine D1 or cannabinoid CB1 receptors, and the opioid system in the central nervous system. Physiol Behav 2020; 220:112881. [DOI: 10.1016/j.physbeh.2020.112881] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/17/2020] [Accepted: 03/17/2020] [Indexed: 02/08/2023]
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Doyle TM, Largent-Milnes TM, Chen Z, Staikopoulos V, Esposito E, Dalgarno R, Fan C, Tosh DK, Cuzzocrea S, Jacobson KA, Trang T, Hutchinson MR, Bennett GJ, Vanderah TW, Salvemini D. Chronic Morphine-Induced Changes in Signaling at the A 3 Adenosine Receptor Contribute to Morphine-Induced Hyperalgesia, Tolerance, and Withdrawal. J Pharmacol Exp Ther 2020; 374:331-341. [PMID: 32434943 DOI: 10.1124/jpet.120.000004] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 04/27/2020] [Indexed: 12/11/2022] Open
Abstract
Treating chronic pain by using opioids, such as morphine, is hampered by the development of opioid-induced hyperalgesia (OIH; increased pain sensitivity), antinociceptive tolerance, and withdrawal, which can contribute to dependence and abuse. In the central nervous system, the purine nucleoside adenosine has been implicated in beneficial and detrimental actions of morphine, but the extent of their interaction remains poorly understood. Here, we demonstrate that morphine-induced OIH and antinociceptive tolerance in rats is associated with a twofold increase in adenosine kinase (ADK) expression in the dorsal horn of the spinal cord. Blocking ADK activity in the spinal cord provided greater than 90% attenuation of OIH and antinociceptive tolerance through A3 adenosine receptor (A3AR) signaling. Supplementing adenosine signaling with selective A3AR agonists blocked OIH and antinociceptive tolerance in rodents of both sexes. Engagement of A3AR in the spinal cord with an ADK inhibitor or A3AR agonist was associated with reduced dorsal horn of the spinal cord expression of the NOD-like receptor pyrin domain-containing 3 (60%-75%), cleaved caspase 1 (40%-60%), interleukin (IL)-1β (76%-80%), and tumor necrosis factor (50%-60%). In contrast, the neuroinhibitory and anti-inflammatory cytokine IL-10 increased twofold. In mice, A3AR agonists prevented the development of tolerance in a model of neuropathic pain and reduced naloxone-dependent withdrawal behaviors by greater than 50%. These findings suggest A3AR-dependent adenosine signaling is compromised during sustained morphine to allow the development of morphine-induced adverse effects. These findings raise the intriguing possibility that A3AR agonists may be useful adjunct to opioids to manage their unwanted effects. SIGNIFICANCE STATEMENT: The development of hyperalgesia and antinociceptive tolerance during prolonged opioid use are noteworthy opioid-induced adverse effects that reduce opioid efficacy for treating chronic pain and increase the risk of dependence and abuse. We report that in rodents, these adverse effects are due to reduced adenosine signaling at the A3AR, resulting in NOD-like receptor pyrin domain-containing 3-interleukin-1β neuroinflammation in spinal cord. These effects are attenuated by A3AR agonists, suggesting that A3AR may be a target for therapeutic intervention with selective A3AR agonist as opioid adjuncts.
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Affiliation(s)
- Timothy M Doyle
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Tally M Largent-Milnes
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Zhoumou Chen
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Vasiliki Staikopoulos
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Emanuela Esposito
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Rebecca Dalgarno
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Churmy Fan
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Dilip K Tosh
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Salvatore Cuzzocrea
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Kenneth A Jacobson
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Tuan Trang
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Mark R Hutchinson
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Gary J Bennett
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Todd W Vanderah
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
| | - Daniela Salvemini
- Department of Pharmacology and Physiology and Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University School of Medicine, St. Louis, Missouri (T.M.D., Z.C., D.S.); Department of Pharmacology, University of Arizona College of Medicine, Tucson, Arizona (T.M.L.-M., T.W.V.); Discipline of Physiology, Institute for Photonics and Advanced Sensing, ARC Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, Australia (V.S., M.R.H.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (E.E., S.C.); Departments of Comparative Biology and Experimental Medicine and Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada (R.D., C.F., T.T.); Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland (D.K.T., K.A.J.); and Department of Anesthesiology, University of California San Diego, La Jolla, California (G.J.B.)
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Javad-Moosavi BZ, Nasehi M, Vaseghi S, Jamaldini SH, Zarrindast MR. Activation and Inactivation of Nicotinic Receptnors in the Dorsal Hippocampal Region Restored Negative Effects of Total (TSD) and REM Sleep Deprivation (RSD) on Memory Acquisition, Locomotor Activity and Pain Perception. Neuroscience 2020; 433:200-211. [PMID: 32200080 DOI: 10.1016/j.neuroscience.2020.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 03/02/2020] [Accepted: 03/03/2020] [Indexed: 12/13/2022]
Abstract
Sleep deprivation (SD) is a common issue in today's society. Sleep is essential for proper cognitive functions, including learning and memory. Furthermore, sleep disorders can alter pain information processing. Meanwhile, hippocampal nicotinic receptors have a role in modulating pain and memory. The goal of this study is to investigate the effect of dorsal hippocampal (CA1) nicotinic receptors on behavioral changes induced by Total (TSD) and REM Sleep Deprivation (RSD). A modified water box and multi-platform apparatus were used to induce TSD and RSD, respectively. To investigate the interaction between nicotinic receptors and hippocampus-dependent memory, nicotinic receptor agonist (nicotine) or antagonist (mecamylamine) was injected into the CA1 region. The results showed, nicotine at the doses of 0.001 and 0.1 µg/rat and mecamylamine at the doses of 0.01 and 0.1 µg/rat decreased memory acquisition, while both at the doses of 0.01 and 0.1 µg/rat enhanced locomotor activity. Additionally, all doses used for both drugs did not alter pain perception. Also, 24 h TSD or RSD attenuated memory acquisition with no effect on locomotor activity and only TSD induced an analgesic effect. Intra-CA1 administration of subthreshold dose of nicotine (0.0001 µg/rat) and mecamylamine (0.001 µg/rat) did not alter memory acquisition, pain perception and locomotor activity in sham of TSD/RSD rats. Both drugs reversed all behavioral changes induced by TSD. Furthermore, both drugs reversed the effect of RSD on memory acquisition, while only mecamylamine reversed the effect of RSD on locomotor activity. In conclusion, CA1 nicotinic receptors play a significant role in TSD/RSD-induced behavioral changes.
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Affiliation(s)
| | - Mohammad Nasehi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Salar Vaseghi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Seyed Hamid Jamaldini
- Department of Genetic, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Mohammad-Reza Zarrindast
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Neuroendocrinology, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Institute for Cognitive Science Studies (ICSS), Tehran, Iran
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Gomes FIF, Cunha FQ, Cunha TM. Peripheral nitric oxide signaling directly blocks inflammatory pain. Biochem Pharmacol 2020; 176:113862. [PMID: 32081790 DOI: 10.1016/j.bcp.2020.113862] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 02/13/2020] [Indexed: 12/12/2022]
Abstract
Pain is a classical sign of inflammation, and sensitization of primary sensory neurons (PSN) is the most important mediating mechanism. This mechanism involves direct action of inflammatory mediators such as prostaglandins and sympathetic amines. Pharmacologic control of inflammatory pain is based on two principal strategies: (i) non-steroidal anti-inflammatory drugs targeting inhibition of prostaglandin production by cyclooxygenases and preventing nociceptor sensitization in humans and animals; (ii) opioids and dipyrone that directly block nociceptor sensitization via activation of the NO signaling pathway. This review summarizes basic concepts of inflammatory pain that are necessary to understand the mechanisms of peripheral NO signaling that promote peripheral analgesia; we also discuss therapeutic perspectives based on the modulation of the NO pathway.
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Affiliation(s)
- Francisco Isaac F Gomes
- Center for Research in Inflammatory Diseases (CRID), Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Fernando Q Cunha
- Center for Research in Inflammatory Diseases (CRID), Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Thiago M Cunha
- Center for Research in Inflammatory Diseases (CRID), Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
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Eydipour Z, Nasehi M, Vaseghi S, Jamaldini SH, Zarrindast MR. The role of 5-HT4 serotonin receptors in the CA1 hippocampal region on memory acquisition impairment induced by total (TSD) and REM sleep deprivation (RSD). Physiol Behav 2019; 215:112788. [PMID: 31863855 DOI: 10.1016/j.physbeh.2019.112788] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 12/06/2019] [Accepted: 12/18/2019] [Indexed: 01/20/2023]
Abstract
Sleep is a circadian rhythm that is modulated by endogenous circadian clock located in the suprachiasmatic nucleus (SCN). Sleep modulates memory acquisition and promotes memory consolidation. Studies have shown that sleep deprivation (SD) impairs different types of memory including passive avoidance. Furthermore, the hippocampus plays a significant role in modulating passive avoidance memory. On the other hand, 5-HT4 receptors are expressed in the hippocampus and involved in learning and memory processes. In this study, we aimed to investigate the role of CA1 hippocampal 5-HT4 receptors in memory acquisition impairment induced by total sleep deprivation (TSD: 24 h) and REM sleep deprivation (RSD: 24 h). The water box apparatus was used to induce TSD, while multi-platform apparatus was applied to induce RSD. Passive avoidance memory test was also used to evaluate memory acquisition. The results showed that, intra-CA1 pre-training injection of RS67333 (5-HT4 agonist) and RS23597 (5-HT4 antagonist) at the doses of 0.01 and 0.1 µg/rat decreased memory acquisition, but did not alter pain perception and locomotor activity. Furthermore, TSD and RSD decreased memory acquisition; however, only TSD decreased locomotor activity and induced analgesic effect. The sub-threshold doses of RS67333 and RS23597, 0.001 and 0.0001 µg/rat, respectively, reversed the effect of TSD on memory acquisition and locomotor activity. In addition, only RS23597 reversed TSD-induced analgesia. In RSD condition, the subthreshold dose of RS23597 improved RSD-induced memory acquisition deficit. In conclusion, CA1 hippocampal 5-HT4 receptors play an important role in TSD/RSD-induced cognitive alterations.
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Affiliation(s)
- Zainab Eydipour
- Department of Biology, Damghan Branch, Islamic Azad University, Semnan, Iran
| | - Mohammad Nasehi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Salar Vaseghi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Seyed Hamid Jamaldini
- Department of Genetic, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Mohammad-Reza Zarrindast
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran; Institute for Cognitive Science Studies (ICSS), Tehran, Iran; Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Neuroendocrinology, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran
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Garrido-Suárez BB, Garrido G, Piñeros O, Delgado-Hernández R. Mangiferin: Possible uses in the prevention and treatment of mixed osteoarthritic pain. Phytother Res 2019; 34:505-525. [PMID: 31755173 DOI: 10.1002/ptr.6546] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 10/07/2019] [Accepted: 10/24/2019] [Indexed: 12/13/2022]
Abstract
Osteoarthritis (OA) pain has been proposed to be a mixed pain state, because in some patients, central nervous system factors are superimposed upon the more traditional peripheral factors. In addition, a considerable amount of preclinical and clinical evidence has shown that, accompanying the central neuroplasticity changes and partially driven by a peripheral nociceptive input, a real neuropathic component occurs that are particularly linked to disease severity and progression. Hence, innovative strategies targeting neuroprotection and particularly neuroinflammation to prevent and treat OA pain could be introduced. Mangiferin (MG) is a glucosylxanthone that is broadly distributed in higher plants, such as Mangifera indica L. Previous studies have documented its analgesic, anti-inflammatory, antioxidant, neuroprotective, and immunomodulatory properties. In this paper, we propose its potential utility as a multitargeted compound for mixed OA pain, even in the context of multimodal pharmacotherapy. This hypothesis is supported by three main aspects: the cumulus of preclinical evidence around this xanthone, some preliminary clinical results using formulations containing MG in clinical musculoskeletal or neuropathic pain, and by speculations regarding its possible mechanism of action according to recent advances in OA pain knowledge.
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Affiliation(s)
- Bárbara B Garrido-Suárez
- Laboratorio de Farmacología y Toxicología, Centro de Investigación y Desarrollo de Medicamentos, Havana, Cuba
| | - Gabino Garrido
- Departamento de Ciencias Farmacéuticas, Facultad de Ciencias, Universidad Católica del Norte, Antofagasta, Chile
| | - Octavio Piñeros
- Departamento de Investigaciones, Universidad de Santiago de Cali, Cali, Colombia
| | - René Delgado-Hernández
- Centro de Estudio para las Investigaciones y Evaluaciones Biológicas, Instituto de Farmacia y Alimentos, Universidad de La Habana, Havana, Cuba
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Adebiyi MG, Manalo J, Kellems RE, Xia Y. Differential role of adenosine signaling cascade in acute and chronic pain. Neurosci Lett 2019; 712:134483. [PMID: 31494223 DOI: 10.1016/j.neulet.2019.134483] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 06/14/2019] [Accepted: 09/04/2019] [Indexed: 12/21/2022]
Abstract
Adenosine is a signaling molecule induced under stress such as energy insufficiency and ischemic/hypoxic conditions. Adenosine controls multiple physiological and pathological cellular and tissue function by activation of four G protein-coupled receptors (GPCR). Functional role of adenosine signaling in acute pain has been widely studied. However, the role of adenosine signaling in chronic pain is poorly understood. At acute levels, adenosine can be beneficial to anti-pain whereas a sustained elevation of adenosine can be detrimental to promote chronic pain. In recent years, extensive progress has been made to define the role of adenosine signaling in chronic pain and to dissect molecular new insight underlying the development of chronic pain. In this review, we summarize the differential role of adenosine signaling cascade in acute and chronic pain with a major focus on recent studies revealing adenosine ADORA2B receptor activation in the pathology of chronic pain. We further provide a therapeutic outlook of how multiple adenosine signaling components can be useful to treat chronic pain.
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Affiliation(s)
- Morayo G Adebiyi
- Department of Biochemistry and Molecular Biology, The University of Texas McGovern Medical School, Houston, TX, USA; The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA
| | - Jeanne Manalo
- Department of Biochemistry and Molecular Biology, The University of Texas McGovern Medical School, Houston, TX, USA; The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA
| | - Rodney E Kellems
- Department of Biochemistry and Molecular Biology, The University of Texas McGovern Medical School, Houston, TX, USA; The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA
| | - Yang Xia
- Department of Biochemistry and Molecular Biology, The University of Texas McGovern Medical School, Houston, TX, USA; The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA.
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2-Allylphenol Reduces IL-1 β and TNF- α, Promoting Antinociception through Adenosinergic, Anti-Inflammatory, and Antioxidant Mechanisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1346878. [PMID: 31049124 PMCID: PMC6462329 DOI: 10.1155/2019/1346878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 11/06/2018] [Accepted: 01/15/2019] [Indexed: 12/18/2022]
Abstract
2-Allylphenol (2-AP) is a synthetic phenylpropanoid, structurally related to cardanol, thymol, and ortho-eugenol. Phenylpropanoids are described in the literature as being capable of promoting biological activity. Due to the similarity between 2-AP and other bioactive phenylpropanoids, the present research aims at evaluating the antioxidant, antinociceptive, and anti-inflammatory potential of 2-AP in silico, in vitro, and in vivo. At 30 min prior to the start of in vivo pharmacological testing, administration of 2-AP (25, 50, 75, and 100 mg/kg i.p.), morphine (6 mg/kg i.p.), dexamethasone (2 mg/kg s.c.), or vehicle alone was performed. In the acetic acid-induced abdominal writhing tests, pretreatment with 2-AP significantly reduced the number of abdominal writhes, as well as decreased licking times in the glutamate and formalin tests. Investigation of the mechanism of action using the formalin model led to the conclusion that the opioid system does not participate in its activity. However, the adenosinergic system is involved. In the peritonitis tests, 2-AP inhibited leukocyte migration and reduced releases of proinflammatory mediators TNF-α and IL-1β. In vitro antioxidant assays demonstrated that 2-AP presents significant ability to sequester superoxide radicals. In silico docking studies confirmed interaction between 2-AP and the adenosine A2a receptor through hydrogen bonds with the critical asparagine 253 residues present in the active site. Investigation of 2-AP demonstrated its nociception inhibition and ability to reduce reactive oxygen species. Its interaction with A2a receptors may well be related to proinflammatory cytokines TNF-α and IL-1β reduction activity, corroborating its antinociceptive effect.
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Magni G, Ceruti S. The role of adenosine and P2Y receptors expressed by multiple cell types in pain transmission. Brain Res Bull 2019; 151:132-143. [PMID: 30797817 DOI: 10.1016/j.brainresbull.2019.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 01/25/2019] [Accepted: 02/15/2019] [Indexed: 02/07/2023]
Abstract
The role of extracellular nucleotides and nucleosides as signaling molecules in cell-to-cell communication has now been clearly established. This is particularly true in the central and peripheral nervous system, where purines and pyrimidines are involved in both physiological and pathological interactions between neurons and surrounding glial cells. It can be thus foreseen that the purinergic system could represent a new potential target for the development of effective analgesics, also through the normalization of neuronal functions and the inhibition of glial cell activation. Research in the last 15 years has progressively confirmed this hypothesis, but no purinergic-based analgesics have reach the market so far; in the present review we have collected the more recent discoveries on the role of G protein-coupled P2Y nucleotide and of adenosine receptors expressed by both neurons and glial cells under painful conditions, and we have highlighted some of the challenges that must be faced to translate basic and preclinical studies to clinics.
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Affiliation(s)
- Giulia Magni
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Via Balzaretti, 9, 20133, Milan, Italy
| | - Stefania Ceruti
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Via Balzaretti, 9, 20133, Milan, Italy.
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Downregulation of adenosine and adenosine A1 receptor contributes to neuropathic pain in resiniferatoxin neuropathy. Pain 2019; 159:1580-1591. [PMID: 29672450 PMCID: PMC6085133 DOI: 10.1097/j.pain.0000000000001246] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study demonstrates that functional prostatic acid phosphatase is required for maintaining the balance of cellular adenosine analgesia in systemic small-fiber neuropathy. The neurochemical effects of adenosine signaling in small-fiber neuropathy leading to neuropathic pain are yet to be explored in a direct manner. This study examined this system at the level of ligand (through the ectonucleotidase activity of prostatic acid phosphatase [PAP]) and adenosine A1 receptors (A1Rs) in resiniferatoxin (RTX) neuropathy, a peripheral neurodegenerative disorder that specifically affects nociceptive nerves expressing transient receptor potential vanilloid type 1 (TRPV1). We conducted immunohistochemistry on dorsal root ganglion (DRG) neurons, high-performance liquid chromatography for functional assays, and pharmacological interventions to alter PAP and A1Rs in mice with RTX neuropathy. In DRG of RTX neuropathy, PAP(+) neurons were reduced compared with vehicle-treated mice (P = 0.002). Functionally, PAP ectonucleotidase activity was consequently reduced (ie, the content of adenosine in DRG, P = 0.012). PAP(+) neuronal density was correlated with the degree of mechanical allodynia, which was reversed by intrathecal (i.t.) lumbar puncture injection of recombinant PAP with a dose-dependent effect. Furthermore, A1Rs were downregulated (P = 0.002), and this downregulation was colocalized with the TRPV1 receptor (31.0% ± 2.8%). Mechanical allodynia was attenuated in a dose-dependent response by i.t. injection of the A1R ligand, adenosine; however, no analgesia was evident when an exogenous adenosine was blocked by A1R antagonist. This study demonstrated dual mechanisms of neuropathic pain in TRPV1-induced neuropathy, involving a reduced adenosine system at both the ligand (adenosine) and receptor (A1Rs) levels.
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Abdel-Salam OM. Modulation of Visceral Nociception, Inflammation and Gastric Mucosal Injury by Cinnarizine. Drug Target Insights 2017. [DOI: 10.1177/117739280700200013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Omar M.E. Abdel-Salam
- Department of Pharmacology, National Research Centre, Tahrir St., Dokki, Cairo, Egypt
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Varani K, Vincenzi F, Merighi S, Gessi S, Borea PA. Biochemical and Pharmacological Role of A1 Adenosine Receptors and Their Modulation as Novel Therapeutic Strategy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1051:193-232. [DOI: 10.1007/5584_2017_61] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Adenosine receptor targets for pain. Neuroscience 2016; 338:1-18. [DOI: 10.1016/j.neuroscience.2015.10.031] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/29/2015] [Accepted: 10/15/2015] [Indexed: 12/21/2022]
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A1 Adenosine Receptor Activation Modulates Central Nervous System Development and Repair. Mol Neurobiol 2016; 54:8128-8139. [DOI: 10.1007/s12035-016-0292-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 11/08/2016] [Indexed: 01/22/2023]
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Laureano-Melo R, da Silveira ALB, de Azevedo Cruz Seara F, da Conceição RR, da Silva-Almeida C, Marinho BG, da Rocha FF, Reis LC, Côrtes WDS. Behavioral profile assessment in offspring of Swiss mice treated during pregnancy and lactation with caffeine. Metab Brain Dis 2016; 31:1071-80. [PMID: 27262967 DOI: 10.1007/s11011-016-9847-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 05/25/2016] [Indexed: 11/26/2022]
Abstract
The association between caffeine consumption and various psychiatric manifestations has long been observed. The objective was to assess the behavioral profile in offspring of Swiss mice treated during pregnancy and lactation with caffeine. For this purpose, two groups (n = 6 each and BW ~ 35 g) of female mice were treated during pregnancy and lactation by: tap water and caffeine solution at a concentration of 0.3 mg/mL through oral route. The offspring obtained, by completing 70 days of life, was underwent a behavioral battery test. Statistical analysis was performed by student t test and the different significance adopted was p < 0.05. According to our results, it was not found any significant differences in tail suspension and forced swimming tests. In anxiety related responses however, the mice of caffeine group had greater number of fecal pellets (178 %, p = 0.001) in the open field test, higher number of attempts (51 %, p = 0.03) in light-dark box and decreased percentage of entries in open arms (41 %, p = 0.01) in elevated plus maze test. Moreover, in the marble burying test, there was a significant decrease in the number of buried marbles compared with controls (110 %, p = 0,002). In the meantime, in the von Frey test, it was observed an exacerbation of mechanical allodynia both in basal conditions and after the carrageenan administration (p < 0.001). Furthermore, caffeine treatment during pregnancy and lactation causes long-term behavioral changes in the mice offspring that manifest later in life.
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Affiliation(s)
- Roberto Laureano-Melo
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Anderson Luiz Bezerra da Silveira
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
- Department of Physical Education, Institute of Education, Federal Rural University of Rio de Janeiro, BR 465, Km 7, 23897-000, Seropédica, Rio de Janeiro, Brazil
| | - Fernando de Azevedo Cruz Seara
- Graduate Program in Physiological Sciences, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 01, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Rodrigo Rodrigues da Conceição
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Cláudio da Silva-Almeida
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Bruno Guimarães Marinho
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
- Graduate Program in Physiological Sciences, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 01, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Fábio Fagundes da Rocha
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
- Graduate Program in Physiological Sciences, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 01, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Luís Carlos Reis
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil
- Graduate Program in Physiological Sciences, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 01, Seropedica, 23897-000, Rio de Janeiro, Brazil
| | - Wellington da Silva Côrtes
- Multicenter Graduate Program in Physiological Sciences, Brazilian Physiological Society, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 30, Seropedica, 23897-000, Rio de Janeiro, Brazil.
- Graduate Program in Physiological Sciences, Institute of Biological and Health Sciences, Department of Physiological Sciences, Federal Rural University of Rio de Janeiro, BR 465, Km 7, PQ Room 01, Seropedica, 23897-000, Rio de Janeiro, Brazil.
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Hu X, Adebiyi MG, Luo J, Sun K, Le TTT, Zhang Y, Wu H, Zhao S, Karmouty-Quintana H, Liu H, Huang A, Wen YE, Zaika OL, Mamenko M, Pochynyuk OM, Kellems RE, Eltzschig HK, Blackburn MR, Walters ET, Huang D, Hu H, Xia Y. Sustained Elevated Adenosine via ADORA2B Promotes Chronic Pain through Neuro-immune Interaction. Cell Rep 2016; 16:106-119. [PMID: 27320922 DOI: 10.1016/j.celrep.2016.05.080] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 03/22/2016] [Accepted: 05/19/2016] [Indexed: 12/29/2022] Open
Abstract
The molecular mechanisms of chronic pain are poorly understood and effective mechanism-based treatments are lacking. Here, we report that mice lacking adenosine deaminase (ADA), an enzyme necessary for the breakdown of adenosine, displayed unexpected chronic mechanical and thermal hypersensitivity due to sustained elevated circulating adenosine. Extending from Ada(-/-) mice, we further discovered that prolonged elevated adenosine contributed to chronic pain behaviors in two additional independent animal models: sickle cell disease mice, a model of severe pain with limited treatment, and complete Freund's adjuvant paw-injected mice, a well-accepted inflammatory model of chronic pain. Mechanistically, we revealed that activation of adenosine A2B receptors on myeloid cells caused nociceptor hyperexcitability and promoted chronic pain via soluble IL-6 receptor trans-signaling, and our findings determined that prolonged accumulated circulating adenosine contributes to chronic pain by promoting immune-neuronal interaction and revealed multiple therapeutic targets.
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Affiliation(s)
- Xia Hu
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Department of Anesthesiology, Third XiangYa Hospital, Central South University, Hunan 440851, China
| | - Morayo G Adebiyi
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas, Houston, TX 77030, USA
| | - Jialie Luo
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Kaiqi Sun
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas, Houston, TX 77030, USA
| | - Thanh-Thuy T Le
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Yujin Zhang
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Hongyu Wu
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Shushan Zhao
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Harry Karmouty-Quintana
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Hong Liu
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas, Houston, TX 77030, USA
| | - Aji Huang
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Yuan Edward Wen
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Oleg L Zaika
- Integrative Biology and Pharmacology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Mykola Mamenko
- Integrative Biology and Pharmacology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Oleh M Pochynyuk
- Integrative Biology and Pharmacology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Rodney E Kellems
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas, Houston, TX 77030, USA
| | - Holger K Eltzschig
- Department of Anesthesiology, The University of Colorado, Aurora, CO 80045, USA
| | - Michael R Blackburn
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas, Houston, TX 77030, USA
| | - Edgar T Walters
- Integrative Biology and Pharmacology, University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Dong Huang
- Department of Anesthesiology, Third XiangYa Hospital, Central South University, Hunan 440851, China
| | - Hongzhen Hu
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Yang Xia
- Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas, Houston, TX 77030, USA.
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Janes K, Symons-Liguori AM, Jacobson KA, Salvemini D. Identification of A3 adenosine receptor agonists as novel non-narcotic analgesics. Br J Pharmacol 2016; 173:1253-67. [PMID: 26804983 DOI: 10.1111/bph.13446] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 11/09/2015] [Accepted: 11/22/2015] [Indexed: 12/26/2022] Open
Abstract
Chronic pain negatively impacts the quality of life in a variety of patient populations. The current therapeutic repertoire is inadequate in managing patient pain and warrants the development of new therapeutics. Adenosine and its four cognate receptors (A1 , A2A , A2B and A3 ) have important roles in physiological and pathophysiological states, including chronic pain. Preclinical and clinical studies have revealed that while adenosine and agonists of the A1 and A2A receptors have antinociceptive properties, their therapeutic utility is limited by adverse cardiovascular side effects. In contrast, our understanding of the A3 receptor is only in its infancy, but exciting preclinical observations of A3 receptor antinociception, which have been bolstered by clinical trials of A3 receptor agonists in other disease states, suggest pain relief without cardiovascular side effects and with sufficient tolerability. Our goal herein is to briefly discuss adenosine and its receptors in the context of pathological pain and to consider the current data regarding A3 receptor-mediated antinociception. We will highlight recent findings regarding the impact of the A3 receptor on pain pathways and examine the current state of selective A3 receptor agonists used for these studies. The adenosine-to-A3 receptor pathway represents an important endogenous system that can be targeted to provide safe, effective pain relief from chronic pain.
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Affiliation(s)
- K Janes
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - A M Symons-Liguori
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - K A Jacobson
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - D Salvemini
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, St. Louis, MO, USA
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Adenosine A1 receptors mediate the intracisternal injection of orexin-induced antinociceptive action against colonic distension in conscious rats. J Neurol Sci 2016; 362:106-10. [DOI: 10.1016/j.jns.2016.01.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 01/13/2016] [Accepted: 01/18/2016] [Indexed: 12/12/2022]
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Abstract
UNLABELLED Treating pain is one of the most difficult challenges in medicine and a key facet of disease management. The isolation of morphine by Friedrich Sertürner in 1804 added an essential pharmacological tool in the treatment of pain and spawned the discovery of a new class of drugs known collectively as opioid analgesics. Revered for their potent pain-relieving effects, even Morpheus the god of dreams could not have dreamt that his opium tincture would be both a gift and a burden to humankind. To date, morphine and other opioids remain essential analgesics for alleviating pain. However, their use is plagued by major side effects, such as analgesic tolerance (diminished pain-relieving effects), hyperalgesia (increased pain sensitivity), and drug dependence. This review highlights recent advances in understanding the key causes of these adverse effects and explores the effect of chronic pain on opioid reward. SIGNIFICANCE STATEMENT Chronic pain is pervasive and afflicts >100 million Americans. Treating pain in these individuals is notoriously difficult and often requires opioids, one of the most powerful and effective classes of drugs used for controlling pain. However, their use is plagued by major side effects, such as a loss of pain-relieving effects (analgesic tolerance), paradoxical pain (hyperalgesia), and addiction. Despite the potential side effects, opioids remain the pharmacological cornerstone of modern pain therapy. This review highlights recent breakthroughs in understanding the key causes of these adverse effects and explores the cellular control of opioid systems in reward and aversion. The findings will challenge traditional views of the good, the bad, and the ugly of opioids.
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Abstract
Chronic pain is one of the most debilitating and expensive diseases, yet current therapies are often insufficient in bringing about long-term relief. Further, many treatments for chronic pain also carry significant side effects. The molecule adenosine has long been identified as a potent inhibitor of nociceptive circuits in the spinal cord; however, the widespread expression of adenosine receptors in many organ systems has limited its use as an analgesic. Recently several 5' ectonucleotidases, including tissue non-specific alkaline phosphatase (TNAP), have been characterized for their ability to generate endogenous adenosine in nociceptive circuitry of the dorsal spinal cord. These ectonucleotidases have the ability to hydrolyze the endogenous pronociceptive nucleotides like adenosine triphosphate (ATP) into the antinociceptive nucleoside adenosine. This chapter discusses the role of TNAP and other ectonucleotidases in nociceptive circuits, and their potential as future targets of new therapeutics to treat chronic pain.
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Affiliation(s)
- Sarah E Street
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,
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Adenosine A1 receptor-dependent antinociception induced by inosine in mice: pharmacological, genetic and biochemical aspects. Mol Neurobiol 2014; 51:1368-78. [PMID: 25064055 DOI: 10.1007/s12035-014-8815-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 07/11/2014] [Indexed: 01/15/2023]
Abstract
Inosine is an endogenous nucleoside that has anti-inflammatory and antinociceptive properties. Inosine is a metabolite of adenosine, and some of its actions suggest the involvement of adenosine A1 receptors (A1Rs). The purpose of this study was to better understand mechanisms of inosine-induced antinociception by investigating the role of A1Rs and purine metabolism inhibitors. Inosine antinociception was evaluated using the formalin test in mice. An A1R-selective antagonist (DPCPX), A1R knockout mice (gene deletion) and mice with A1R reduced expression (antisense oligonucleotides) were used to assess the role of A1Rs in the antinociceptive action of inosine. Binding assays were performed to compare the affinity of inosine and adenosine for A1Rs. Finally, the role of adenosine and inosine breakdown was assessed using deoxycoformycin (DCF) and forodesine (FDS) as enzymatic inhibitors of adenosine deaminase and purine nucleoside phosphorylase, respectively. Inosine induced antinociception in the formalin test when given by systemic, spinal and peripheral routes. Systemically, inosine exhibited a potency similar to adenosine, and its effects were inhibited by DPCPX. Inosine did not induce antinociception in A1R knockout mice or in mice with reduced A1R expression. In binding studies, inosine bound to A1Rs with an affinity similar to adenosine. DCF had no effect on inosine actions. FDS augmented the antinociceptive effect of a low systemic dose of inosine and, at a higher dose, induced antinociception by itself. Collectively, these data indicate that inosine is an agonist for A1Rs with antinociceptive properties and a potency similar to adenosine and can be considered another endogenous ligand for this receptor.
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Zakaria ZA, Sani MHM, Cheema MS, Kader AA, Kek TL, Salleh MZ. Antinociceptive activity of methanolic extract of Muntingia calabura leaves: further elucidation of the possible mechanisms. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 14:63. [PMID: 24555641 PMCID: PMC3941974 DOI: 10.1186/1472-6882-14-63] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 02/11/2014] [Indexed: 11/10/2022]
Abstract
Background Muntingia calabura (Elaecoparceae) is a medicinal plant traditionally used, particularly, by the Peruvian people to alleviate headache and cold, pain associated with gastric ulcers or to reduce the prostate gland swelling. Following the recent establishment of antinociceptive activity of M. calabura leaf, the present study was performed to further elucidate on the possible mechanisms of antinociception involved. Methods The methanol extract of M. calabura (MEMC) was prepared in the doses of 100, 250 and 500 mg/kg. The role of bradykinin, protein kinase C, pottasium channels, and various opioid and non-opioid receptors in modulating the extract’s antinociceptive activity was determined using several antinociceptive assays. Results are presented as Mean ± standard error of mean (SEM). The one-way ANOVA test with Dunnett's multiple comparison was used to analyze and compare the data, with P < 0.05 as the limit of significance. Results The MEMC, at all doses, demonstrated a significant (p < 0.05) dose-dependent antinociceptive activity in both the bradykinin- and phorbol 12-myristate 13-acetate (PMA)-induced nociception. Pretreatment of the 500 mg/kg MEMC with 10 mg/kg glibenclamide (an ATP-sensitive K+ channel inhibitor), the antagonist of μ-, δ- and κ-opioid receptors (namely 10 mg/kg β-funaltrexamine, 1 mg/kg naltrindole and 1 mg/kg nor-binaltorphimine), and the non-opioid receptor antagonists (namely 3 mg/kg caffeine (a non-selective adenosinergic receptor antagonist), 0.15 mg/kg yohimbine (an α2-noradrenergic antagonist), and 1 mg/kg pindolol (a β-adrenoceptor antagonist)) significantly (p < 0.05) reversed the MEMC antinociception. However, 10 mg/kg atropine (a non-selective cholinergic receptor antagonist), 0.15 mg/kg prazosin (an α1-noradrenergic antagonist) and 20 mg/kg haloperidol (a non-selective dopaminergic antagonist) did not affect the extract's antinociception. The phytochemicals screening revealed the presence of saponins, flavonoids, tannins and triterpenes while the HPLC analysis showed the presence of flavonoid-based compounds. Conclusions The antinociceptive activity of MEMC involved activation of the non-selective opioid (particularly the μ-, δ- and κ-opioid) and non-opioid (particularly adenosinergic, α2-noradrenergic, and β-adrenergic) receptors, modulation of the ATP-sensitive K+ channel, and inhibition of bradikinin and protein kinase C actions. The discrepancies in MEMC antinociception could be due to the presence of various phytochemicals.
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Fredholm BB. Adenosine--a physiological or pathophysiological agent? J Mol Med (Berl) 2013; 92:201-6. [PMID: 24362516 DOI: 10.1007/s00109-013-1101-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 04/26/2013] [Accepted: 04/29/2013] [Indexed: 01/25/2023]
Abstract
This minireview briefly summarizes the evidence that adenosine, acting on four G-protein coupled receptors, can play physiological roles, but is also critically involved in pathological processes. The factors that decide which of these is the more important in a specific cell or organ are briefly summarized. The fact that drugs that target adenosine receptors in disease will also hit the physiological processes will make drug development more tricky.
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Affiliation(s)
- Bertil B Fredholm
- Department of Physiology and Pharmacology, Karolinska Institutet, S-17177, Stockholm, Sweden,
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Yamaguchi D, Terayama R, Omura S, Tsuchiya H, Sato T, Ichikawa H, Sugimoto T. Effect of adenosine A1 receptor agonist on the enhanced excitability of spinal dorsal horn neurons after peripheral nerve injury. Int J Neurosci 2013; 124:213-22. [DOI: 10.3109/00207454.2013.842566] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Tissue-nonspecific alkaline phosphatase acts redundantly with PAP and NT5E to generate adenosine in the dorsal spinal cord. J Neurosci 2013; 33:11314-22. [PMID: 23825434 DOI: 10.1523/jneurosci.0133-13.2013] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Prostatic acid phosphatase (PAP) and ecto-5'-nucleotidase (NT5E) hydrolyze extracellular AMP to adenosine in dorsal root ganglia (DRG) neurons and in the dorsal spinal cord. Previously, we found that adenosine production was reduced, but not eliminated, in Pap⁻/⁻/Nt5e⁻/⁻ double knock-out (dKO) mice, suggesting that a third AMP ectonucleotidase was present in these tissues. Here, we found that tissue-nonspecific alkaline phosphatase (TNAP, encoded by the Alpl gene) is expressed and functional in DRG neurons and spinal neurons. Using a cell-based assay, we found that TNAP rapidly hydrolyzed extracellular AMP and activated adenosine receptors. This activity was eliminated by MLS-0038949, a selective pharmacological inhibitor of TNAP. In addition, MLS-0038949 eliminated AMP hydrolysis in DRG and spinal lamina II of dKO mice. Using fast-scan-cyclic voltammetry, we found that adenosine was rapidly produced from AMP in spinal cord slices from dKO mice, but virtually no adenosine was produced in spinal cord slices from dKO mice treated with MLS-0038949. Last, we found that AMP inhibited excitatory neurotransmission via adenosine A1 receptor activation in spinal cord slices from wild-type, Pap⁻/⁻, Nt5e⁻/⁻, and dKO mice, but failed to inhibit neurotransmission in slices from dKO mice treated with MLS-0038949. These data suggest that triple elimination of TNAP, PAP, and NT5E is required to block AMP hydrolysis to adenosine in DRG neurons and dorsal spinal cord. Moreover, our data reveal that TNAP, PAP, and NT5E are the main AMP ectonucleotidases in primary somatosensory neurons and regulate physiology by metabolizing extracellular purine nucleotides.
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Traditional acupuncture triggers a local increase in adenosine in human subjects. THE JOURNAL OF PAIN 2013. [PMID: 23182227 DOI: 10.1016/j.jpain.2012.09.012] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
UNLABELLED Acupuncture is a form of Eastern medicine that has been practiced for centuries. Despite its long history and worldwide application, the biological mechanisms of acupuncture in relieving pain have been poorly defined. Recent studies in mice, however, demonstrate that acupuncture triggers increases in interstitial adenosine, which reduces the severity of chronic pain through adenosine A1 receptors, suggesting that adenosine-mediated antinociception contributes to the clinical benefits of acupuncture. We asked here whether acupuncture in human subjects is also linked to a local increase in interstitial adenosine concentration. We collected microdialysis samples of interstitial fluid before, during, and after delivering 30 minutes of conventional acupuncture in the Zusanli point in human subjects. The interstitial adenosine concentration increased significantly during acupuncture and remained elevated for 30 minutes after the acupuncture. Acupuncture-mediated adenosine release was not observed if acupuncture was not delivered in the Zusanli point or if the acupuncture needle was inserted, but not rotated. This study strengthens the role of adenosine in acupuncture-mediated antinociception by directly providing such evidence in humans. PERSPECTIVE This article presents further evidence of the role of adenosine in acupuncture-mediated antinociception by demonstrating that local adenosine concentrations increase in the acupoint in human subjects receiving traditional acupuncture.
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Donkor K, Okine LN, Abotsi WK, Woode E. Anti-inflammatory and Anti-nociceptive Effects of Ethyl Acetate Fraction of Root Bark of Cassia sieberiana D. C. in Murine Models. ACTA ACUST UNITED AC 2013. [DOI: 10.5567/pharmacologia.2013.301.310] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chen JF, Eltzschig HK, Fredholm BB. Adenosine receptors as drug targets--what are the challenges? Nat Rev Drug Discov 2013; 12:265-86. [PMID: 23535933 PMCID: PMC3930074 DOI: 10.1038/nrd3955] [Citation(s) in RCA: 650] [Impact Index Per Article: 59.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adenosine signalling has long been a target for drug development, with adenosine itself or its derivatives being used clinically since the 1940s. In addition, methylxanthines such as caffeine have profound biological effects as antagonists at adenosine receptors. Moreover, drugs such as dipyridamole and methotrexate act by enhancing the activation of adenosine receptors. There is strong evidence that adenosine has a functional role in many diseases, and several pharmacological compounds specifically targeting individual adenosine receptors--either directly or indirectly--have now entered the clinic. However, only one adenosine receptor-specific agent--the adenosine A2A receptor agonist regadenoson (Lexiscan; Astellas Pharma)--has so far gained approval from the US Food and Drug Administration (FDA). Here, we focus on the biology of adenosine signalling to identify hurdles in the development of additional pharmacological compounds targeting adenosine receptors and discuss strategies to overcome these challenges.
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Affiliation(s)
- Jiang-Fan Chen
- Department of Neurology and Pharmacology, Boston University School of Medicine, Boston, Massachusetts 02118, USA
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