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Eugenia Ortiz M, Sinhorim L, Hoffmann de Oliveira B, Hardt da Silva R, Melo de Souza G, de Souza G, Paula Piovezan A, Balduino Bittencourt E, Bianco G, Shiguemi Inoue Salgado A, Klingler W, Schleip R, Fernandes Martins D. Analgesia by fascia manipulation is mediated by peripheral and spinal adenosine A 1 receptor in a mouse model of peripheral inflammation. Neuroscience 2024; 555:125-133. [PMID: 39038598 DOI: 10.1016/j.neuroscience.2024.07.031] [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: 04/22/2024] [Revised: 07/08/2024] [Accepted: 07/18/2024] [Indexed: 07/24/2024]
Abstract
The role of adenosine receptors in fascial manipulation-induced analgesia has not yet been investigated. The purpose of this study was to evaluate the involvement of the adenosine A1 receptor (A1R) in the antihyperalgesic effect of plantar fascia manipulation (PFM), specifically in mice with peripheral inflammation. Mice injected with Complete Freund's Adjuvant (CFA) underwent behavioral, i.e. mechanical hyperalgesia and edema. The mice underwent PFM for either 3, 9 or 15 min. Response frequency to mechanical stimuli was then assessed at 24 and 96 h after plantar CFA injection. The adenosinergic receptors were assessed by systemic (intraperitoneal, i.p.), central (intrathecal, i.t.), and peripheral (intraplantar, i.pl.) administration of caffeine. The participation of the A1R was investigated using the 1,3-dipropyl-8-cyclopentylxanthine (DPCPX), a selective A1R subtype antagonist. PFM inhibited mechanical hyperalgesia induced by CFA injection and did not reduce paw edema. Furthermore, the antihyperalgesic effect of PFM was prevented by pretreatment of the animals with caffeine given by i.p., i.pl., and i.t. routes. In addition, i.pl. and i.t. administrations of DPCPX blocked the antihyperalgesia caused by PFM. These observations indicate that adenosine receptors mediate the antihyperalgesic effect of PFM. Caffeine's inhibition of PFM-induced antihyperalgesia suggests that a more precise understanding of how fascia-manipulation and caffeine interact is warranted.
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Affiliation(s)
- Maria Eugenia Ortiz
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Larissa Sinhorim
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Bruna Hoffmann de Oliveira
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Rafaela Hardt da Silva
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Gabriel Melo de Souza
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Gabriela de Souza
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Anna Paula Piovezan
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil
| | - Edsel Balduino Bittencourt
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil; Coastal Health Institute, Jacksonville, USA
| | - Gianluca Bianco
- Research Laboratory of Posturology and Neuromodulation (RELPON), Department of Human Neuroscience, Sapienza University, Rome, Italy; Istituto di Formazione in Agopuntura e Neuromodulazione (IFAN), Roma, Italy
| | | | - Werner Klingler
- SRH Hospitals, Sigmaringen, Germany; Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany; Department for Medical Professions, Diploma University of Applied Sciences, Bad Sooden-Allendorf, Germany
| | - Robert Schleip
- Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany; Department for Medical Professions, Diploma University of Applied Sciences, Bad Sooden-Allendorf, Germany; Fascia Research Group, Experimental Anesthesiology, Ulm University, Ulm, Germany
| | - Daniel Fernandes Martins
- Experimental Neuroscience Laboratory (LaNEx), Graduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, Brazil.
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Penna DBDS, Gumiéro Costa S, Dos Santos-Rodrigues A, Pandolfo P. The association of caffeine and nandrolone decanoate modulates aversive memory and nociception in rats. Brain Res 2024; 1837:148937. [PMID: 38615923 DOI: 10.1016/j.brainres.2024.148937] [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: 01/29/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/16/2024]
Abstract
Caffeine and anabolic-androgenic steroids (AAS) are commonly used to improve muscle mass and athletic performance. Nandrolone Decanoate (ND) is one of the most abused AAS worldwide, leading to behavioral changes in both humans and rodents. Caffeine, the most widely consumed psychostimulant globally, is present in various thermogenic and gym supplements. Low and moderate doses of caffeine antagonize adenosine receptors and have been linked to improved memory and pain relief. We have previously demonstrated that consuming caffeine prevents the risk-taking behavior triggered by nandrolone. In this study, we aimed to investigate the long-term effects of ND and caffeine, either alone or in combination, on passive avoidance memory and nociception. We used the step-down and hot-plate tasks in male and female Lister Hooded rats. Our results confirmed the antinociceptive effect of caffeine and indicated that chronic administration of the ND-caffeine association promotes the evocation of aversive memory in female rats.
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Affiliation(s)
- Daniel Bussinger de Souza Penna
- Institute of Biomedical Sciences, Program of Biomedical Sciences: Physiology and Pharmacology, Federal Fluminense University, Niteroi, Brazil; Institute of Biology, Program of Neurosciences, Federal Fluminense University, Niteroi, Brazil
| | - Samara Gumiéro Costa
- Institute of Biomedical Sciences, Program of Biomedical Sciences: Physiology and Pharmacology, Federal Fluminense University, Niteroi, Brazil
| | | | - Pablo Pandolfo
- Institute of Biomedical Sciences, Program of Biomedical Sciences: Physiology and Pharmacology, Federal Fluminense University, Niteroi, Brazil; Institute of Biology, Program of Neurosciences, Federal Fluminense University, Niteroi, Brazil.
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3
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Jiang L, Zhou Y, Tang S, Yang D, Zhang Y, Zhang J, Yang F, Zhou T, Xia X, Chen Q, Jiang L, Jiang Y, Feng X. Nociceptive adenosine A 2A receptor on trigeminal nerves orchestrates CGRP release to regulate the progression of oral squamous cell carcinoma. Int J Oral Sci 2024; 16:46. [PMID: 38886342 PMCID: PMC11183250 DOI: 10.1038/s41368-024-00308-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 04/16/2024] [Accepted: 04/21/2024] [Indexed: 06/20/2024] Open
Abstract
Oral squamous cell carcinoma (OSCC) associated pain commonly predicts adverse events among patients. This clinical feature indicates the engagement of nociceptors on sensory neurons during the development of malignancy. However, it is yet to be determined if targeting oncometabolite-associated nociception processes can hinder OSCC progression. In this study, we reported that nociceptive endings infiltrating both clinical samples and mouse tumor xenografts were associated with poorer clinical outcomes and drove tumor progression in vivo, as evidenced by clinical tissue microarray analysis and murine lingual denervation. We observed that the OSCC microenvironment was characteristic of excessive adenosine due to CD73 upregulation which negatively predicted clinical outcomes in the TCGA-HNSC patient cohort. Notably, such adenosine concentrative OSCC niche was associated with the stimulation of adenosine A2A receptor (A2AR) on trigeminal ganglia. Antagonism of trigeminal A2AR with a selective A2AR inhibitor SCH58261 resulted in impeded OSCC growth in vivo. We showed that trigeminal A2AR overstimulation in OSCC xenograft did not entail any changes in the transcription level of CGRP in trigeminal ganglia but significantly triggered the release of CGRP, an effect counteracted by SCH58261. We further demonstrated the pro-tumor effect of CGRP by feeding mice with the clinically approved CGRP receptor antagonist rimegepant which inhibited the activation of ERK and YAP. Finally, we diminished the impact of CGRP on OSCC with istradefylline, a clinically available drug that targets neuronal A2AR. Therefore, we established trigeminal A2AR-mediated CGRP release as a promising druggable circuit in OSCC treatment.
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Grants
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- 82170971, 82373187, 82002888 National Natural Science Foundation of China (National Science Foundation of China)
- Fundamental Research Funds for the Central Universities (YJ201987); Sichuan Science and Technology Program (2021ZYD0090 and 2022YFS0207); Scientific Research Foundation, West China Hospital of Stomatology Sichuan University (QDJF2019-3 and RD-03-202110); CAMS Innovation Fund for Medical Sciences (CIFMS, 2019-I2M-5-004)
- Fundamental Research Funds for the Central Universities (YJ201987), Sichuan Science and Technology Program (2021ZYD0090 and 2022YFS0207), Scientific Research Foundation, West China Hospital of Stomatology Sichuan University (QDJF2019-3 and RD-03-202110), and CAMS Innovation Fund for Medical Sciences (CIFMS, 2019-I2M-5-004)
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Affiliation(s)
- Lanxin Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ying Zhou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shijie Tang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Dan Yang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yixin Zhang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiuge Zhang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Fan Yang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Tong Zhou
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoqiang Xia
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qianming Chen
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Affiliated Stomatology Hospital, Zhejiang University School of Stomatology, Hangzhou, China
| | - Lu Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yuchen Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Xiaodong Feng
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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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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5
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Zhang C, Li Y, Yu Y, Li Z, Xu X, Talifu Z, Liu W, Yang D, Gao F, Wei S, Zhang L, Gong H, Peng R, Du L, Li J. Impact of inflammation and Treg cell regulation on neuropathic pain in spinal cord injury: mechanisms and therapeutic prospects. Front Immunol 2024; 15:1334828. [PMID: 38348031 PMCID: PMC10859493 DOI: 10.3389/fimmu.2024.1334828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/03/2024] [Indexed: 02/15/2024] Open
Abstract
Spinal cord injury is a severe neurological trauma that can frequently lead to neuropathic pain. During the initial stages following spinal cord injury, inflammation plays a critical role; however, excessive inflammation can exacerbate pain. Regulatory T cells (Treg cells) have a crucial function in regulating inflammation and alleviating neuropathic pain. Treg cells release suppressor cytokines and modulate the function of other immune cells to suppress the inflammatory response. Simultaneously, inflammation impedes Treg cell activity, further intensifying neuropathic pain. Therefore, suppressing the inflammatory response while enhancing Treg cell regulatory function may provide novel therapeutic avenues for treating neuropathic pain resulting from spinal cord injury. This review comprehensively describes the mechanisms underlying the inflammatory response and Treg cell regulation subsequent to spinal cord injury, with a specific focus on exploring the potential mechanisms through which Treg cells regulate neuropathic pain following spinal cord injury. The insights gained from this review aim to provide new concepts and a rationale for the therapeutic prospects and direction of cell therapy in spinal cord injury-related conditions.
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Affiliation(s)
- Chunjia Zhang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Yan Li
- Institute of Rehabilitation medicine, China Rehabilitation Research Center, Beijing, China
| | - Yan Yu
- Institute of Rehabilitation medicine, China Rehabilitation Research Center, Beijing, China
| | - Zehui Li
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Xin Xu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Zuliyaer Talifu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, China
| | - Wubo Liu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Degang Yang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Feng Gao
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Song Wei
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Liang Zhang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Han Gong
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Run Peng
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Liangjie Du
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
| | - Jianjun Li
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Institute of Rehabilitation medicine, China Rehabilitation Research Center, Beijing, China
- Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
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Giovanardi CM, Gonzalez-Lorenzo M, Poini A, Marchi E, Culcasi A, Ursini F, Faldini C, Di Martino A, Mazzanti U, Campesato E, Matrà A, Cevoli S, Benedetti MG. Acupuncture as an alternative or in addition to conventional treatment for chronic non-specific low back pain: A systematic review and meta-analysis. Integr Med Res 2023; 12:100972. [PMID: 37637183 PMCID: PMC10448023 DOI: 10.1016/j.imr.2023.100972] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 05/26/2023] [Accepted: 06/05/2023] [Indexed: 08/29/2023] Open
Abstract
Background Conventional therapies (CTs), pharmacological (PH) and non-pharmacological (NPH), do not always achieve benefits in the treatment of chronic low back pain (CLBP). We assessed efficacy and safety of acupuncture for CLBP as alternative or addition to CT. Methods We included randomised controlled trials (RCTs) comparing acupuncture alone or in combination with CT to CT. We searched Medline, Cochrane Library, Embase up to May 2022. We assessed risk of bias with the original Cochrane tool and GRADE certainty of evidence. Results were pooled through meta-analysis. Results Ten RCTs (2122 participants) were included comparing acupuncture versus CT and 4 RCTs (374 participants) were comparing acupuncture plus CT to CT alone. In terms of comparing acupuncture with NPH or PH, no differences were found for pain and disability. Comparing acupuncture with PH and NPH combined, pain and disability were reduced (SMD=-0.50, 95% CI -0.62 to -0.37; SMD=-0.71, 95% CI -1.17 to -0.24). Comparing acupuncture plus NPH with NPH alone, pain and disability were reduced (SMD=-0.70, 95% CI -0.94 to -0.46; SMD=-0.95, 95% CI -1.36 to -0.54). Comparing acupuncture plus PH with PH alone, pain and disability were reduced (MD=-0.21, 95% CI -433.28 to -10.42; MD=-3.1, 95% CI -4.87 to -1.83). Comparing acupuncture plus combined treatment versus combined treatment alone, no differences were found in pain, while disability was reduced (MD=-3.40 95% CI -5.17 to -1.63). No studies assessed adverse event. Certainty of evidence ranged from moderate to very low. Conclusions We are uncertain whether acupuncture is more effective and safer than CT. In the comparisons without estimates' imprecision, acupuncture showed promising results. Acupuncture could be an option based on patients' preferences.
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Affiliation(s)
| | - Marien Gonzalez-Lorenzo
- Laboratorio di Metodologia delle Revisioni Sistematiche e Produzione di Linee Guida, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Alessandra Poini
- Physical Medicine and Rehabilitation Unit, State Hospital - Republic of San Marino (SMR), Italy
| | - Eleonora Marchi
- Physical Medicine and Rehabilitation Unit, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Antonio Culcasi
- Medicine & Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Francesco Ursini
- Medicine & Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Cesare Faldini
- Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, Bologna, Italy
- 1st Orthopaedic and Traumatology Department, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Alberto Di Martino
- Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, Bologna, Italy
- 1st Orthopaedic and Traumatology Department, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | | | - Emanuela Campesato
- UO Anaestesia and Pain Therapy Unit Melotti, Department of Emergency and Urgency, Bologna, Italy
| | - Annunzio Matrà
- Italian Federation of Acupuncture Societies, Bologna, Italy
| | - Sabina Cevoli
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Maria Grazia Benedetti
- Physical Medicine and Rehabilitation Unit, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences (DIBINEM), Alma Mater Studiorum University of Bologna, Bologna, Italy
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7
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Cui X, Zhang Z, Xi H, Liu K, Zhu B, Gao X. Sympathetic-Sensory Coupling as a Potential Mechanism for Acupoints Sensitization. J Pain Res 2023; 16:2997-3004. [PMID: 37667684 PMCID: PMC10475306 DOI: 10.2147/jpr.s424841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/15/2023] [Indexed: 09/06/2023] Open
Abstract
A series of studies have demonstrated acupoint sensitization, in which acupoints can be activated in combination with sensory hypersensitivity and functional plasticity during visceral disorders. However, the mechanisms of acupoint sensitization remain unclear. Neuroanatomy evidence showed nociceptors innervated in acupoints contribute to the mechanism of acupoint sensitization. Increasing studies suggested sympathetic nerve plays a key role in modulating sensory transmission by sprouting or coupling with sensory neuron/nociceptor in the peripheral, forming the functional structure of the sympathetic-sensory coupling. Notably, the sensory inputs of the disease-induced sensitized acupoint contribute to the homeostatic regulation and also involve in delivering therapeutic information under acupuncture, hence, the role of sprouted sympathetic in acupoint function should be given attention. We herein reviewed the current knowledge of sympathetic and its sprouting in pain modulation, then discussed and highlighted the potential value of sympathetic-sensory coupling in acupoint functional plasticity.
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Affiliation(s)
- Xiang Cui
- Department of Physiology, Institute of Acupuncture and Moxibustion, Academy of Chinese Medical Sciences, Beijing, 100700, People’s Republic of China
| | - Ziyi Zhang
- Department of Physiology, Institute of Acupuncture and Moxibustion, Academy of Chinese Medical Sciences, Beijing, 100700, People’s Republic of China
- College of Acupuncture and Tuina, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi Province, 712046, People’s Republic of China
| | - Hanqing Xi
- Department of Physiology, Institute of Acupuncture and Moxibustion, Academy of Chinese Medical Sciences, Beijing, 100700, People’s Republic of China
| | - Kun Liu
- Department of Physiology, Institute of Acupuncture and Moxibustion, Academy of Chinese Medical Sciences, Beijing, 100700, People’s Republic of China
| | - Bing Zhu
- Department of Physiology, Institute of Acupuncture and Moxibustion, Academy of Chinese Medical Sciences, Beijing, 100700, People’s Republic of China
| | - Xinyan Gao
- Department of Physiology, Institute of Acupuncture and Moxibustion, Academy of Chinese Medical Sciences, Beijing, 100700, People’s Republic of China
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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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9
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Nguyen ATN, Tran QL, Baltos JA, McNeill SM, Nguyen DTN, May LT. Small molecule allosteric modulation of the adenosine A 1 receptor. Front Endocrinol (Lausanne) 2023; 14:1184360. [PMID: 37435481 PMCID: PMC10331460 DOI: 10.3389/fendo.2023.1184360] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 05/23/2023] [Indexed: 07/13/2023] Open
Abstract
G protein-coupled receptors (GPCRs) represent the target for approximately a third of FDA-approved small molecule drugs. The adenosine A1 receptor (A1R), one of four adenosine GPCR subtypes, has important (patho)physiological roles in humans. A1R has well-established roles in the regulation of the cardiovascular and nervous systems, where it has been identified as a potential therapeutic target for a number of conditions, including cardiac ischemia-reperfusion injury, cognition, epilepsy, and neuropathic pain. A1R small molecule drugs, typically orthosteric ligands, have undergone clinical trials. To date, none have progressed into the clinic, predominantly due to dose-limiting unwanted effects. The development of A1R allosteric modulators that target a topographically distinct binding site represent a promising approach to overcome current limitations. Pharmacological parameters of allosteric ligands, including affinity, efficacy and cooperativity, can be optimized to regulate A1R activity with high subtype, spatial and temporal selectivity. This review aims to offer insights into the A1R as a potential therapeutic target and highlight recent advances in the structural understanding of A1R allosteric modulation.
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Affiliation(s)
- Anh T. N. Nguyen
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Quan L. Tran
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Jo-Anne Baltos
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Samantha M. McNeill
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Diep T. N. Nguyen
- Department of Information Technology, Faculty of Engineering and Technology, Vietnam National University, Hanoi, Vietnam
| | - Lauren T. May
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
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10
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Hu Q, Li G. Role of purinergic receptors in cardiac sympathetic nerve injury in diabetes mellitus. Neuropharmacology 2023; 226:109406. [PMID: 36586475 DOI: 10.1016/j.neuropharm.2022.109406] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 12/13/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022]
Abstract
Diabetic cardiac autonomic neuropathy is a common and serious chronic complication of diabetes, which can lead to sympathetic and parasympathetic nerve imbalance and a relative excitation of the sympathetic nerve. Purinergic receptors play a crucial role in this process. Diabetic cardiac sympathetic nerve injury affects the expression of purinergic receptors, and activated purinergic receptors affect the phosphorylation of different signaling pathways and the regulation of inflammatory processes. This paper introduces the abnormal changes of sympathetic nerve in diabetes mellitus and summarizes the recently published studies on the role of several purinergic receptor subtypes in diabetic cardiac sympathetic nerve injury. These studies suggest that purinergic receptors as novel drug targets are of great significance for the treatment of diabetic autonomic neuropathy. This article is part of the Special Issue on "Purinergic Signaling: 50 years".
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Affiliation(s)
- Qixing Hu
- Department of Physiology, Medical School of Nanchang University, 461 Bayi Road, Nanchang, Jiangxi, 330006, PR China.
| | - Guilin Li
- Department of Physiology, Medical School of Nanchang University, 461 Bayi Road, Nanchang, Jiangxi, 330006, PR China.
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11
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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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12
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Padín JF, Maroto M, Entrena JM, Egea J, Montell E, Vergés J, López MG, Cobos EJ, García AG. Small Synthetic Hyaluronan Disaccharide BIS014 Mitigates Neuropathic Pain in Mice. THE JOURNAL OF PAIN 2023; 24:68-83. [PMID: 36087908 DOI: 10.1016/j.jpain.2022.07.014] [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: 04/27/2022] [Revised: 07/18/2022] [Accepted: 07/31/2022] [Indexed: 02/08/2023]
Abstract
Neuropathic pain (NP) is a challenging condition to treat, as the need for new drugs to treat NP is an unmet goal. We investigated the analgesic potential of a new sulfated disaccharide compound, named BIS014. Oral administration (p.o.) of this compound induced ameliorative effects in formalin-induced nociception and capsaicin-induced secondary mechanical hypersensitivity in mice, but also after partial sciatic nerve transection (spared nerve injury), chemotherapy (paclitaxel)-induced NP, and diabetic neuropathy induced by streptozotocin. Importantly, BIS014, at doses active on neuropathic hypersensitivity (60 mg/kg/p.o.), did not alter exploratory activity or motor coordination (in the rotarod test), unlike a standard dose of gabapentin (40 mg/kg/p.o.) which although inducing antiallodynic effects on the NP models, it also markedly decreased exploration and motor coordination. In docking and molecular dynamic simulation studies, BIS014 interacted with TRPV1, a receptor involved in pain transmission where it behaved as a partial agonist. Additionally, similar to capsaicin, BIS014 increased cytosolic Ca2+ concentration ([Ca2+]c) in neuroblastoma cells expressing TRPV1 receptors; these elevations were blocked by ruthenium red. BIS014 did not block capsaicin-elicited [Ca2+]c transients, but inhibited the increase in the firing rate of action potentials in bradykinin-sensitized dorsal root ganglion neurons stimulated with capsaicin. Perspective: We report that the oral administration of a new sulfated disaccharide compound, named BIS014, decreases neuropathic pain from diverse etiology in mice. Unlike the comparator gabapentin, BIS014 does not induce sedation. Thus, BIS014 has the potential to become a new efficacious non-sedative oral medication for the treatment of neuropathic pain.
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Affiliation(s)
- Juan-Fernando Padín
- Instituto-Fundación Teófilo Hernando, C/ Faraday 7, Parque Científico del Campus de Cantoblanco, Universidad Autónoma de Madrid, Madrid, Spain; Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo 4, Madrid, Spain; Departamento de Ciencias Médicas (Farmacología), Facultad de Medicina, Universidad de Castilla-La Mancha, Ciudad Real, Spain.
| | - Marcos Maroto
- Instituto-Fundación Teófilo Hernando, C/ Faraday 7, Parque Científico del Campus de Cantoblanco, Universidad Autónoma de Madrid, Madrid, Spain.
| | - José Manuel Entrena
- Unidad de Análisis de Comportamiento Animal, Centro de Instrumentación Científica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Armilla, Granada, Spain.
| | - Javier Egea
- Instituto de Investigación Sanitaria del Hospital Universitario La Princesa (IIS La Princesa), C/Diego de León 62 (1ª planta), Madrid, Spain.
| | - Eulàlia Montell
- Pre-Clinical R&D Department, Bioibérica, S.A., Barcelona, Spain.
| | - Josep Vergés
- Pre-Clinical R&D Department, Bioibérica, S.A., Barcelona, Spain.
| | - Manuela G López
- Instituto-Fundación Teófilo Hernando, C/ Faraday 7, Parque Científico del Campus de Cantoblanco, Universidad Autónoma de Madrid, Madrid, Spain; Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo 4, Madrid, Spain; Instituto de Investigación Sanitaria del Hospital Universitario La Princesa (IIS La Princesa), C/Diego de León 62 (1ª planta), Madrid, Spain.
| | - Enrique J Cobos
- Departamento de Farmacología e Instituto de Neurociencias, Facultad de Medicina, Universidad de Granada e Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.
| | - Antonio G García
- Instituto-Fundación Teófilo Hernando, C/ Faraday 7, Parque Científico del Campus de Cantoblanco, Universidad Autónoma de Madrid, Madrid, Spain; Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo 4, Madrid, Spain; Instituto de Investigación Sanitaria del Hospital Universitario La Princesa (IIS La Princesa), C/Diego de León 62 (1ª planta), Madrid, Spain.
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13
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Liu J, Jia S, Huang F, He H, Fan W. Peripheral role of glutamate in orofacial pain. Front Neurosci 2022; 16:929136. [PMID: 36440288 PMCID: PMC9682037 DOI: 10.3389/fnins.2022.929136] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 10/10/2022] [Indexed: 09/10/2023] Open
Abstract
Glutamate is the principal excitatory neurotransmitter in the central nervous system. In the periphery, glutamate acts as a transmitter and involves in the signaling and processing of sensory input. Glutamate acts at several types of receptors and also interacts with other transmitters/mediators under various physiological and pathophysiological conditions including chronic pain. The increasing amount of evidence suggests that glutamate may play a role through multiple mechanisms in orofacial pain processing. In this study, we reviewed the current understanding of how peripheral glutamate mediates orofacial pain, how glutamate is regulated in the periphery, and how these findings are translated into therapies for pain conditions.
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Affiliation(s)
- Jinyue Liu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Shilin Jia
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Fang Huang
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Hongwen He
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Wenguo Fan
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
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14
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Jia S, Liu J, Chu Y, Liu Q, Mai L, Fan W. Single-cell RNA sequencing reveals distinct transcriptional features of the purinergic signaling in mouse trigeminal ganglion. Front Mol Neurosci 2022; 15:1038539. [PMID: 36311028 PMCID: PMC9606672 DOI: 10.3389/fnmol.2022.1038539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 09/27/2022] [Indexed: 11/30/2022] Open
Abstract
Trigeminal ganglion (TG) is the first station of sensory pathways in the orofacial region. The TG neurons communicate with satellite glial cells (SGCs), macrophages and other cells forming a functional unit that is responsible for processing of orofacial sensory information. Purinergic signaling, one of the most widespread autocrine and paracrine pathways, plays a crucial role in intercellular communication. The multidirectional action of purinergic signaling in different cell types contributes to the neuromodulation and orofacial sensation. To fully understand the purinergic signaling in these processes, it is essential to determine the shared and unique expression patterns of genes associated with purinergic signaling in different cell types. Here, we performed single-cell RNA sequencing of 22,969 cells isolated from normal mouse TGs. We identified 18 distinct cell populations, including 6 neuron subpopulations, 3 glial subpopulations, 7 immune cell subpopulations, fibroblasts, and endothelial cells. We also revealed the transcriptional features of genes associated with purinergic signaling, including purinergic receptors, extracellular adenosine triphosphate (eATP) release channels, eATP metabolism-associated enzymes, and eATP transporters in each cell type. Our results have important implications for understanding and predicting the cell type-specific roles of the purinergic signaling in orofacial signal processing in the trigeminal primary sensory system.
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Affiliation(s)
- Shilin Jia
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - JinYue Liu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Yanhao Chu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Qing Liu
- Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Lijia Mai
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Wenguo Fan
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
- *Correspondence: Wenguo Fan,
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15
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Akhunzada MJ, Yoon HJ, Deb I, Braka A, Wu S. Bell-Evans model and steered molecular dynamics in uncovering the dissociation kinetics of ligands targeting G-protein-coupled receptors. Sci Rep 2022; 12:15972. [PMID: 36153364 PMCID: PMC9509322 DOI: 10.1038/s41598-022-20065-2] [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: 04/15/2022] [Accepted: 09/08/2022] [Indexed: 11/10/2022] Open
Abstract
AbstractRecently, academic and industrial scientific communities involved in kinetics-based drug development have become immensely interested in predicting the drug target residence time. Screening drug candidates in terms of their computationally predicted residence times, which is a measure of drug efficacy in vivo, and simultaneously assessing computational binding affinities are becoming inevitable. Non-equilibrium molecular simulation approaches are proven to be useful in this purpose. Here, we have implemented an optimized approach of combining the data derived from steered molecular dynamics simulations and the Bell-Evans model to predict the absolute residence times of the antagonist ZMA241385 and agonist NECA that target the A2A adenosine receptor of the G-protein-coupled receptor (GPCR) protein family. We have predicted the absolute ligand residence times on the timescale of seconds. However, our predictions were many folds shorter than those determined experimentally. Additionally, we calculated the thermodynamics of ligand binding in terms of ligand binding energies and the per-residue contribution of the receptor. Subsequently, binding pocket hotspot residues that would be important for further computational mutagenesis studies were identified. In the experiment, similar sets of residues were found to be in significant contact with both ligands under study. Our results build a strong foundation for further improvement of our approach by rationalizing the kinetics of ligand unbinding with the thermodynamics of ligand binding.
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16
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Ye L, Dai Q, Hou F, Wu C, Qiu X, Yuan P, Chen F, Meng Y, Feng X, Jiang L. Salivary metabolomics of burning mouth syndrome: A cross-sectional study. Arch Oral Biol 2022; 144:105552. [DOI: 10.1016/j.archoralbio.2022.105552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/09/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022]
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17
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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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18
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Effects of allopurinol on pain and anxiety in fibromyalgia patients: a pilot study. Braz J Anesthesiol 2021; 71:660-663. [PMID: 34715996 PMCID: PMC9373309 DOI: 10.1016/j.bjane.2020.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 12/12/2020] [Accepted: 12/24/2020] [Indexed: 11/29/2022] Open
Abstract
Allopurinol is a potent inhibitor of the enzyme xanthine oxidase used in the treatment of hyperuricemia and gout. The aim of this pilot study was to investigate the effects of allopurinol on pain and anxiety in women displaying fibromyalgia refractory to conventional therapy. This prospective case series enrolled 12 women with previous diagnosis of fibromyalgia refractory to conventional therapy. Patients received an add-on therapy with oral allopurinol 300 mg twice daily for 30 days. Patients were submitted to evaluation for pain and anxiety scores before treatment, 15 and 30 days thereafter. This pilot study has demonstrated that oral administration of allopurinol 300 mg twice daily caused a significant reduction on pain scores up to 30 days of treatment in women with fibromyalgia. No effect was observed regarding anxiety scores. Randomized clinical trials are warranted and should further investigate allopurinol and more selective purine derivatives in the management of acute or chronic pain conditions.
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19
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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: 10] [Impact Index Per Article: 3.3] [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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20
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Brault V, Nguyen TL, Flores-Gutiérrez J, Iacono G, Birling MC, Lalanne V, Meziane H, Manousopoulou A, Pavlovic G, Lindner L, Selloum M, Sorg T, Yu E, Garbis SD, Hérault Y. Dyrk1a gene dosage in glutamatergic neurons has key effects in cognitive deficits observed in mouse models of MRD7 and Down syndrome. PLoS Genet 2021; 17:e1009777. [PMID: 34587162 PMCID: PMC8480849 DOI: 10.1371/journal.pgen.1009777] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 08/16/2021] [Indexed: 12/03/2022] Open
Abstract
Perturbation of the excitation/inhibition (E/I) balance leads to neurodevelopmental diseases including to autism spectrum disorders, intellectual disability, and epilepsy. Loss-of-function mutations in the DYRK1A gene, located on human chromosome 21 (Hsa21,) lead to an intellectual disability syndrome associated with microcephaly, epilepsy, and autistic troubles. Overexpression of DYRK1A, on the other hand, has been linked with learning and memory defects observed in people with Down syndrome (DS). Dyrk1a is expressed in both glutamatergic and GABAergic neurons, but its impact on each neuronal population has not yet been elucidated. Here we investigated the impact of Dyrk1a gene copy number variation in glutamatergic neurons using a conditional knockout allele of Dyrk1a crossed with the Tg(Camk2-Cre)4Gsc transgenic mouse. We explored this genetic modification in homozygotes, heterozygotes and combined with the Dp(16Lipi-Zbtb21)1Yey trisomic mouse model to unravel the consequence of Dyrk1a dosage from 0 to 3, to understand its role in normal physiology, and in MRD7 and DS. Overall, Dyrk1a dosage in postnatal glutamatergic neurons did not impact locomotor activity, working memory or epileptic susceptibility, but revealed that Dyrk1a is involved in long-term explicit memory. Molecular analyses pointed at a deregulation of transcriptional activity through immediate early genes and a role of DYRK1A at the glutamatergic post-synapse by deregulating and interacting with key post-synaptic proteins implicated in mechanism leading to long-term enhanced synaptic plasticity. Altogether, our work gives important information to understand the action of DYRK1A inhibitors and have a better therapeutic approach. The Dual Specificity Tyrosine Phosphorylation Regulated Kinase 1A, DYRK1A, drives cognitive alterations with increased dose in Down syndrome (DS) or with reduced dose in DYRK1A-related intellectual disability syndromes (ORPHA:268261; ORPHA:464311) also known as mental retardation, autosomal dominant disease 7 (MRD7; OMIM #614104). Here we report that specific and complete loss of Dyrk1a in glutamatergic neurons induced a range of specific cognitive phenotypes and alter the expression of genes involved in neurotransmission in the hippocampus. We further explored the consequences of Dyrk1a dosage in glutamatergic neurons on the cognitive phenotypes observed respectively in MRD7 and DS mouse models and we found specific roles in long-term explicit memory with no impact on motor activity, short-term working memory, and susceptibility to epilepsy. Then we demonstrated that DYRK1A is a component of the glutamatergic post-synapse and interacts with several component such as NR2B and PSD95. Altogether our work describes a new role of DYRK1A at the glutamatergic synapse that must be considered to understand the consequence of treatment targeting DYRK1A in disease.
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Affiliation(s)
- Véronique Brault
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Thu Lan Nguyen
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Javier Flores-Gutiérrez
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Giovanni Iacono
- Department of Molecular Biology, Radboud Institute for Molecular Life Sciences, Radboud University, Nijmegen, the Netherlands
| | - Marie-Christine Birling
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Valérie Lalanne
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Hamid Meziane
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Antigoni Manousopoulou
- Institute for Life Sciences, University of Southampton, School of Medicine, Southampton, United Kingdom
| | - Guillaume Pavlovic
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Loïc Lindner
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
| | - Mohammed Selloum
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Tania Sorg
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
| | - Eugene Yu
- The Children’s Guild Foundation Down Syndrome Research Program, Genetics and Genomics Program and Department of Cancer Genetics and Genomics, Roswell Park Comprehensive Cancer Center, Buffalo, New York, United States of America
- Genetics, Genomics and Bioinformatics Program, State University of New York At Buffalo, Buffalo, New York, United States of America
| | - Spiros D. Garbis
- Institute for Life Sciences, University of Southampton, School of Medicine, Southampton, United Kingdom
| | - Yann Hérault
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France
- Université de Strasbourg, CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris, Illkirch, France
- * E-mail:
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21
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Hüll K, Fernández-Dueñas V, Schönberger M, López-Cano M, Trauner D, Ciruela F. Optical Control of Adenosine-Mediated Pain Modulation. Bioconjug Chem 2021; 32:1979-1983. [PMID: 34448572 PMCID: PMC8634359 DOI: 10.1021/acs.bioconjchem.1c00387] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/23/2021] [Indexed: 11/28/2022]
Abstract
Adenosine receptors (ARs) play many important roles in physiology and have been recognized as potential targets for pain relief. Here, we introduce three photoswitchable adenosine derivatives that function as light-dependent agonists for ARs and confer optical control to these G protein-coupled receptors. One of our compounds, AzoAdenosine-3, was evaluated in the classical formalin model of pain. The molecule, active in the dark, was not metabolized by adenosine deaminase and effectively reduced pain perception in a light-dependent manner. These antinociceptive effects suggested a major role for A1R and A3R in peripheral-mediated pain sensitization, whereas an average adenosine-mediated antinociceptive effect will be facilitated by A2AR and A2BR. Our results demonstrate that a photoswitchable adenosine derivative can be used to map the contribution of ARs mediating analgesia in vivo.
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Affiliation(s)
- Katharina Hüll
- Department
of Chemistry, New York University, 100 Washington Square East, New York City, New York 10003, United States
- Department
of Chemistry and Center for Integrated Protein Munich, Ludwig-Maximilians-Universität Menchen, Butenandtstrasse 5−13, 81377 Munich, Germany
| | - Víctor Fernández-Dueñas
- Pharmacology
Unit, Department of Pathology and Experimental Therapeutics, Faculty
of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Av. Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Spain
- Neuropharmacology
and Pain Group, Neuroscience Program, IDIBELL, Av. Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Spain
| | - Matthias Schönberger
- Department
of Chemistry and Center for Integrated Protein Munich, Ludwig-Maximilians-Universität Menchen, Butenandtstrasse 5−13, 81377 Munich, Germany
| | - Marc López-Cano
- Pharmacology
Unit, Department of Pathology and Experimental Therapeutics, Faculty
of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Av. Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Spain
- Neuropharmacology
and Pain Group, Neuroscience Program, IDIBELL, Av. Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Spain
| | - Dirk Trauner
- Department
of Chemistry, New York University, 100 Washington Square East, New York City, New York 10003, United States
| | - Francisco Ciruela
- Pharmacology
Unit, Department of Pathology and Experimental Therapeutics, Faculty
of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Av. Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Spain
- Neuropharmacology
and Pain Group, Neuroscience Program, IDIBELL, Av. Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Spain
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22
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Nascimento FP, Macedo-Júnior SJ, Lapa-Costa FR, Cezar-Dos-Santos F, Santos ARS. Inosine as a Tool to Understand and Treat Central Nervous System Disorders: A Neglected Actor? Front Neurosci 2021; 15:703783. [PMID: 34504414 PMCID: PMC8421806 DOI: 10.3389/fnins.2021.703783] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/20/2021] [Indexed: 11/13/2022] Open
Abstract
Since the 1970s, when ATP was identified as a co-transmitter in sympathetic and parasympathetic nerves, it and its active metabolite adenosine have been considered relevant signaling molecules in biological and pathological processes in the central nervous system (CNS). Meanwhile, inosine, a naturally occurring purine nucleoside formed by adenosine breakdown, was considered an inert adenosine metabolite and remained a neglected actor on the purinergic signaling scene in the CNS. However, this scenario began to change in the 1980s. In the last four decades, an extensive group of shreds of evidence has supported the importance of mediated effects by inosine in the CNS. Also, inosine was identified as a natural trigger of adenosine receptors. This evidence has shed light on the therapeutic potential of inosine on disease processes involved in neurological and psychiatric disorders. Here, we highlight the clinical and preclinical studies investigating the involvement of inosine in chronic pain, schizophrenia, epilepsy, depression, anxiety, and in neural regeneration and neurodegenerative diseases, such as Parkinson and Alzheimer. Thus, we hope that this review will strengthen the knowledge and stimulate more studies about the effects promoted by inosine in neurological and psychiatric disorders.
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Affiliation(s)
- Francisney Pinto Nascimento
- Programa de Pós-Graduação em Biociências, Laboratório de Neurofarmacologia Clínica, Faculdade de Medicina, Universidade Federal da Integração Latino-Americana, Foz do Iguaçu, Brazil
| | | | | | - Fernando Cezar-Dos-Santos
- Programa de Pós-Graduação em Biociências, Laboratório de Neurofarmacologia Clínica, Faculdade de Medicina, Universidade Federal da Integração Latino-Americana, Foz do Iguaçu, Brazil
| | - Adair R S Santos
- Programa de Pós-Graduação em Neurociências, Laboratório de Neurobiologia da Dor e Inflamação, Universidade Federal de Santa Catarina, Florianópolis, Brazil
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23
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Rodak K, Kokot I, Kratz EM. Caffeine as a Factor Influencing the Functioning of the Human Body-Friend or Foe? Nutrients 2021; 13:3088. [PMID: 34578966 PMCID: PMC8467199 DOI: 10.3390/nu13093088] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 02/08/2023] Open
Abstract
Nowadays, caffeine is one of the most commonly consumed substances, which presents in many plants and products. It has both positive and negative effects on the human body, and its activity concerns a variety of systems including the central nervous system, immune system, digestive system, respiratory system, urinary tract, etc. These effects are dependent on quantity, the type of product in which caffeine is contained, and also on the individual differences among people (sex, age, diet etc.). The main aim of this review was to collect, present, and analyze the available information including the latest discoveries on the impact of caffeine on human health and the functioning of human body systems, taking into account the role of caffeine in individual disease entities. We present both the positive and negative sides of caffeine consumption and the healing properties of this purine alkaloid in diseases such as asthma, Parkinson's disease, and others, not forgetting about the negative effects of excess caffeine (e.g., in people with hypertension, children, adolescents, and the elderly). In summary, we can conclude, however, that caffeine has a multi-directional influence on various organs of the human body, and because of its anti-oxidative properties, it was, and still is, an interesting topic for research studies including those aimed at developing new therapeutic strategies.
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Affiliation(s)
- Kamil Rodak
- Student Research Club, “Biomarkers in Medical Diagnostics”, Department of Laboratory Diagnostics, Division of Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska Street 211A, 50-556 Wroclaw, Poland
| | - Izabela Kokot
- Department of Laboratory Diagnostics, Division of Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska Street 211A, 50-556 Wroclaw, Poland;
| | - Ewa Maria Kratz
- Department of Laboratory Diagnostics, Division of Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska Street 211A, 50-556 Wroclaw, Poland;
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24
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Allopurinol attenuates postoperative pain and modulates the purinergic system in patients undergoing abdominal hysterectomy: a randomized controlled trial. J Anesth 2021; 35:818-826. [PMID: 34390392 DOI: 10.1007/s00540-021-02983-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/04/2021] [Indexed: 11/27/2022]
Abstract
PURPOSE Allopurinol is a potent inhibitor of the enzyme xanthine oxidase used primarily in the treatment of hyperuricemia and gout. The aim of this study was to compare the analgesic efficacy of preanesthetic allopurinol versus placebo on postoperative pain and anxiety in patients undergoing abdominal hysterectomy. METHODS This is a prospective, double-blinded, placebo-controlled, randomized clinical trial. We investigated 54 patients scheduled to undergo elective abdominal hysterectomy. Patients were randomly assigned to receive either oral allopurinol 300 mg (n = 27) or placebo (n = 27) the night before and 1 h before surgery. Patients were submitted to evaluation of pain and anxiety before the treatment, for 24 h postoperatively, 30 and 90 days after surgery. Cerebrospinal fluid was collected at the time of the spinal anesthesia to perform the measurement of the central levels of purines. RESULTS Preoperative administration of allopurinol was effective in reducing postoperative pain 2 h after surgery. Allopurinol caused a reduction of approximately 40% in pain scores measured by the visual analogue pain scale after surgery (p < 0.05). No differences were found between groups in anxiety scores after surgery. There was a significant change in the cerebrospinal fluid concentrations of xanthine and uric acid before surgery (p < 0.01). CONCLUSION This study showed a short-term benefit of the use of allopurinol as a preanesthetic medication since it was related to a reduction on pain scores 2 h after surgery. The purinergic system is a potential target for new analgesic drugs. New studies investigating more selective purine derivatives in the management of pain should be performed. TRIAL NUMBER REGISTRATION Brazilian Registry of Clinical Trials-ReBEC #RBR-9pw58p.
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25
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Fagundes AC, de Oliveira ED, Ferrari SG, Dos Santos LMM, Botelho LM, Schmidt SRG, Andrade CF, Lara DR, Souza DO, Schmidt AP. Allopurinol for fibromyalgia pain in adults: A randomized controlled trial. Pain Pract 2021; 22:19-27. [PMID: 33864725 DOI: 10.1111/papr.13019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 04/09/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Allopurinol is a potent inhibitor of the enzyme xanthine oxidase used in the treatment of hyperuricemia and gout. Because it is well known that purines exert multiple affects on pain transmission, we hypothesized that the inhibition of xanthine oxidase by allopurinol could be a valid strategy to treat pain in humans. This study aimed to compare the analgesic efficacy of oral allopurinol versus placebo as an adjuvant therapy in patients displaying fibromyalgia. METHODS This randomized, double-blinded, placebo-controlled study included 60 women with the diagnosis of fibromyalgia. Patients were randomly assigned to receive either oral allopurinol 300 mg (n = 31) or placebo (n = 29) twice daily during 30 days. The patients were submitted to evaluation for pain sensitivity, anxiety, depression, and functional status before treatment, and 15 and 30 days thereafter. RESULTS Oral administration of allopurinol 300 mg twice daily was ineffective in improving pain scores measured by several tools up to 30 days of treatment (P > 0.05). Additionally, no significant effects of allopurinol over anxiety, depressive symptoms, and functional status of fibromyalgia patients were observed in the present study. CONCLUSIONS Although previous findings indicated that allopurinol could present intrinsic analgesic effects in both animals and humans, this study showed no benefit of the use of oral allopurinol as an adjuvant strategy during 30 days in women displaying fibromyalgia. However, considering previous promising results, new prospective studies are still valid to further investigate allopurinol and more selective purine derivatives in the management of pain syndromes.
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Affiliation(s)
- Aécio C Fagundes
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Enderson D de Oliveira
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Samira G Ferrari
- Department of Anesthesia and Perioperative Medicine, Hospital de Clínicas de Porto Alegre (HCPA), UFRGS, Porto Alegre, RS, Brazil
| | - Lúcia M M Dos Santos
- Department of Pain and Palliative Care, Hospital de Clínicas de Porto Alegre (HCPA), UFRGS, Porto Alegre, RS, Brazil
| | - Leonardo M Botelho
- Department of Pain and Palliative Care, Hospital de Clínicas de Porto Alegre (HCPA), UFRGS, Porto Alegre, RS, Brazil
| | - Sérgio R G Schmidt
- Pain S.O.S., Pain Relief Center, Medical Center of Hospital Mãe de Deus, Porto Alegre, RS, Brazil
| | - Cristiano F Andrade
- Postgraduate Program in Pneumological Sciences, UFRGS, Porto Alegre, RS, Brazil
| | - Diogo R Lara
- Cingulo Mental Health App, Porto Alegre, RS, Brazil
| | - Diogo O Souza
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - André P Schmidt
- Department of Biochemistry, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Department of Anesthesia and Perioperative Medicine, Hospital de Clínicas de Porto Alegre (HCPA), UFRGS, Porto Alegre, RS, Brazil.,Pain S.O.S., Pain Relief Center, Medical Center of Hospital Mãe de Deus, Porto Alegre, RS, Brazil.,Postgraduate Program in Pneumological Sciences, UFRGS, Porto Alegre, RS, Brazil.,Department of Anesthesia, Santa Casa de Porto Alegre, Universidade Federal de Ciências Médicas de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.,Department of Anesthesia, Hospital Nossa Senhora da Conceição, Porto Alegre, RS, Brazil
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26
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The role of peripheral adenosine receptors in glutamate-induced pain nociceptive behavior. Purinergic Signal 2021; 17:303-312. [PMID: 33860899 DOI: 10.1007/s11302-021-09781-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 03/15/2021] [Indexed: 12/13/2022] Open
Abstract
The role of peripheral adenosine receptors in pain is a controversial issue and seems to be quite different from the roles of spinal and central adenosine receptors. The present study is aimed at clarifying the role of these receptors in peripheral nociception. To clarify this, studies were done on Swiss mice with adenosine receptor agonists and antagonists. Nociceptive behavior was induced by subcutaneous injection of glutamate (10 μmol) into the ventral surface of the hind paw of mice. Statistical analyses were performed by one-way ANOVA followed by the Student-Newman-Keuls post hoc test. Results showed that intraplantar (i.pl.) administration of N6-cyclohexyl-adenosine (CHA), an adenosine A1 receptor agonist, at 1 or 10 μg/paw significantly reduced glutamate-induced nociception (p<0.01 and p<0.001 vs. vehicle, respectively, n=8-10). In contrast, i.pl. injection of hydrochloride hydrate (CGS21680, an adenosine A2A receptor agonist) (1 μg/paw) induced a significant increase in glutamate-induced nociception compared to the vehicle (p<0.05, n=8), while 4-(-2-[7-amino-2-{2-furyl}{1,2,4}triazolo{2,3-a} {1,3,5}triazin-5-yl-amino]ethyl)phenol (ZM241385, an adenosine A2A receptor antagonist) (20 μg/paw) caused a significant reduction (p<0.05, n=7-8). There were no significant effects on i.pl. administration of four additional adenosine receptor drugs-8-cyclopentyl-1,3-dipropylxanthine (DPCPX, an A1 antagonist, 1-10 μg/paw), N(6)-[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)-ethyl]adenosine (DPMA, an A2B agonist, 1-100 μg/paw), alloxazine (an A2B antagonist, 0.1-3 μg/paw), and 2-hexyn-1-yl-N(6)-methyladenosine (HEMADO) (an A3 agonist, 1-100 μg/paw) (p>0.05 vs. vehicle for all tests). We also found that prior administration of DPCPX (3 μg/paw) significantly blocked the anti-nociceptive effect of CHA (1 μg/paw) (p<0.05, n=7-9). Similarly, ZM241385 (20 μg/paw) administered prior to CGS21680 (1 μg/paw) significantly blocked CGS21680-induced exacerbation of nociception (p<0.05, n=8). Finally, inosine (10 and 100 μg/paw), a novel endogenous adenosine A1 receptor agonist recently reported by our research group, was also able to reduce glutamate-induced nociception (p<0.001 vs. vehicle, n=7-8). Interestingly, as an A1 adenosine receptor agonist, the inosine effect was significantly blocked by the A1 antagonist DPCPX (3 μg/paw) (p<0.05, n=7-9) but not by the A2A antagonist ZM241385 (10 μg/paw, p>0.05). In summary, these results demonstrate for the first time that i.pl administration of inosine induces an anti-nociceptive effect, similar to that elicited by CHA and possibly mediated by peripheral adenosine A1 receptor activation. Moreover, our results suggest that peripheral adenosine A2A receptor activation presents a pro-nociceptive effect, exacerbating glutamate-induced nociception independent of inosine-induced anti-nociceptive effects.
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27
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McNeill SM, Baltos JA, White PJ, May LT. Biased agonism at adenosine receptors. Cell Signal 2021; 82:109954. [PMID: 33610717 DOI: 10.1016/j.cellsig.2021.109954] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/11/2021] [Accepted: 02/13/2021] [Indexed: 01/14/2023]
Abstract
Adenosine modulates many aspects of human physiology and pathophysiology through binding to the adenosine family of G protein-coupled receptors, which are comprised of four subtypes, the A1R, A2AR, A2BR and A3R. Modulation of adenosine receptor function by exogenous agonists, antagonists and allosteric modulators can be beneficial for a number of conditions including cardiovascular disease, Parkinson's disease, and cancer. Unfortunately, many preclinical drug candidates targeting adenosine receptors have failed in clinical trials due to limited efficacy and/or severe on-target undesired effects. To overcome the key barriers typically encountered when transitioning adenosine receptor ligands into the clinic, research efforts have focussed on exploiting the phenomenon of biased agonism. Biased agonism provides the opportunity to develop ligands that favour therapeutic signalling pathways, whilst avoiding signalling associated with on-target undesired effects. Recent studies have begun to define the structure-function relationships that underpin adenosine receptor biased agonism and establish how this phenomenon can be harnessed therapeutically. In this review we describe the recent advancements made towards achieving therapeutically relevant biased agonism at adenosine receptors.
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Affiliation(s)
- Samantha M McNeill
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Melbourne, VIC, Australia
| | - Jo-Anne Baltos
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Melbourne, VIC, Australia; Department of Pharmacology, Monash University, Melbourne, VIC, Australia.
| | - Paul J White
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Melbourne, VIC, Australia
| | - Lauren T May
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Melbourne, VIC, Australia; Department of Pharmacology, Monash University, Melbourne, VIC, Australia.
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28
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Spanoghe J, Larsen LE, Craey E, Manzella S, Van Dycke A, Boon P, Raedt R. The Signaling Pathways Involved in the Anticonvulsive Effects of the Adenosine A 1 Receptor. Int J Mol Sci 2020; 22:ijms22010320. [PMID: 33396826 PMCID: PMC7794785 DOI: 10.3390/ijms22010320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/22/2020] [Accepted: 12/27/2020] [Indexed: 12/20/2022] Open
Abstract
Adenosine acts as an endogenous anticonvulsant and seizure terminator in the brain. Many of its anticonvulsive effects are mediated through the activation of the adenosine A1 receptor, a G protein-coupled receptor with a wide array of targets. Activating A1 receptors is an effective approach to suppress seizures. This review gives an overview of the neuronal targets of the adenosine A1 receptor focusing in particular on signaling pathways resulting in neuronal inhibition. These include direct interactions of G protein subunits, the adenyl cyclase pathway and the phospholipase C pathway, which all mediate neuronal hyperpolarization and suppression of synaptic transmission. Additionally, the contribution of the guanyl cyclase and mitogen-activated protein kinase cascades to the seizure-suppressing effects of A1 receptor activation are discussed. This review ends with the cautionary note that chronic activation of the A1 receptor might have detrimental effects, which will need to be avoided when pursuing A1 receptor-based epilepsy therapies.
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Affiliation(s)
- Jeroen Spanoghe
- 4Brain, Department of Head and Skin, Ghent University, 9000 Ghent, Belgium; (J.S.); (L.E.L.); (E.C.); (S.M.); (P.B.)
| | - Lars E. Larsen
- 4Brain, Department of Head and Skin, Ghent University, 9000 Ghent, Belgium; (J.S.); (L.E.L.); (E.C.); (S.M.); (P.B.)
| | - Erine Craey
- 4Brain, Department of Head and Skin, Ghent University, 9000 Ghent, Belgium; (J.S.); (L.E.L.); (E.C.); (S.M.); (P.B.)
| | - Simona Manzella
- 4Brain, Department of Head and Skin, Ghent University, 9000 Ghent, Belgium; (J.S.); (L.E.L.); (E.C.); (S.M.); (P.B.)
| | - Annelies Van Dycke
- Department of Neurology, General Hospital Sint-Jan Bruges, 8000 Bruges, Belgium;
| | - Paul Boon
- 4Brain, Department of Head and Skin, Ghent University, 9000 Ghent, Belgium; (J.S.); (L.E.L.); (E.C.); (S.M.); (P.B.)
| | - Robrecht Raedt
- 4Brain, Department of Head and Skin, Ghent University, 9000 Ghent, Belgium; (J.S.); (L.E.L.); (E.C.); (S.M.); (P.B.)
- Correspondence:
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Cioato SG, Medeiros LF, Lopes BC, de Souza A, Medeiros HR, Assumpção JAF, Caumo W, Roesler R, Torres ILS. Antinociceptive and neurochemical effects of a single dose of IB-MECA in chronic pain rat models. Purinergic Signal 2020; 16:573-584. [PMID: 33161497 PMCID: PMC7855191 DOI: 10.1007/s11302-020-09751-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 10/18/2020] [Indexed: 12/31/2022] Open
Abstract
This study aimed to evaluate the effect of a single administration of IB-MECA, an A3 adenosine receptor agonist, upon the nociceptive response and central biomarkers of rats submitted to chronic pain models. A total of 136 adult male Wistar rats were divided into two protocols: (1) chronic inflammatory pain (CIP) using complete Freund's adjuvant and (2) neuropathic pain (NP) by chronic constriction injury of the sciatic nerve. Thermal and mechanical hyperalgesia was measured using von Frey (VF), Randal-Selitto (RS), and hot plate (HP) tests. Rats were treated with a single dose of IB-MECA (0.5 μmol/kg i.p.), a vehicle (dimethyl sulfoxide-DMSO), or positive control (morphine, 5 mg/kg i.p.). Interleukin 1β (IL-1β), brain-derived neurotrophic factor (BDNF), and nerve growth factor (NGF) levels were measured in the brainstem and spinal cord using enzyme-linked immunosorbent assay (ELISA). The establishment of the chronic pain (CIP or NP) model was observed 14 days after induction by a decreased nociceptive threshold in all three tests (GEE, P < 0.05). The antinociceptive effect of a single dose of IB-MECA was observed in both chronic pain models, but this was more effective in NP model. There was an increase in IL-1β levels promoted by CIP. NP model promoted increase in the brainstem BDNF levels, which was reversed by IB-MECA.
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Affiliation(s)
- Stefania Giotti Cioato
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
| | - Liciane Fernandes Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, RS, Brazil
| | - Bettega Costa Lopes
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, ICBS, UFRGS, Porto Alegre, RS, Brazil
| | - Andressa de Souza
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, RS, Brazil
| | - Helouise Richardt Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil
| | - José Antônio Fagundes Assumpção
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
| | - Wolnei Caumo
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil
| | - Rafael Roesler
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil
- Cancer and Neurobiology Laboratory, Experimental Research Center, HCPA, Porto Alegre, RS, Brazil
| | - Iraci L S Torres
- Laboratório de Farmacologia da Dor e Neuromodulação, Investigações Pré-clínicas, Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2350, Porto Alegre, RS, 90035-007, Brazil.
- Unidade de Experimentação Animal, Grupo de Pesquisa e Pós-Graduação, HCPA, Porto Alegre, RS, Brazil.
- Programa de Pós-Graduação em Ciências Biológicas, Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde (ICBS), UFRGS, Porto Alegre, RS, Brazil.
- Programa de Pós-Graduação em Medicina, Ciências Médicas, UFRGS, Porto Alegre, RS, Brazil.
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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: 43] [Impact Index Per Article: 10.8] [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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Preparation of 5-[131I]iodotubercidin for the detection of adenosine kinase. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07465-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Torres ILS, Assumpção JAF, de Souza A, de Oliveira C, Adachi LNS, Scarabelot VL, Cioato SG, Rozisky JR, Caumo W, Silva RS, Battastini AMO, Medeiros LF. Effects of gestational and breastfeeding caffeine exposure in adenosine A1 agonist-induced antinociception of infant rats. Int J Dev Neurosci 2020; 80:709-716. [PMID: 33030219 DOI: 10.1002/jdn.10069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/02/2020] [Accepted: 09/27/2020] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES Caffeine is extensively consumed as a psychostimulant drug, acting on A1 and A2A adenosine receptors blockade. Chronic exposure to caffeine during gestation and breast-feeding may be involved in infant rat's behavioral and biochemical alterations. Our goal was to evaluate the effect of chronic caffeine exposure during gestation and breast-feeding in the functionality of adenosine A1 receptors in infant rats at P14. NTPDase and 5'-nucleotidase activities were also evaluated. METHODS Mating of adult female Wistar rats was confirmed by presence of sperm in vaginal smears. Rats were divided into three groups on the first day of pregnancy: (1) control: tap water, (2) caffeine: 0.3 g/L until P14, and (3) washout caffeine: caffeine was changed to tap water at P7. Evaluation of nociceptive response was performed at P14 using hot plate (HP) and tail-flick latency (TFL) tests. A1 receptor involvement was assessed using caffeine agonist (CPA) and antagonist (DPCPX). Enzymatic activities assays were conducted in the spinal cord. RESULTS Gestational and breastfeeding exposure to caffeine (caffeine and washout groups) did not induce significant alterations in thermal nociceptive thresholds (HP and TF tests). Both caffeine groups did not show analgesic response induced by CPA when compared to the control group at P14, indicating chronic exposure to caffeine in the aforementioned periods inhibits the antinociceptive effects of the systemic A1 receptor agonist administration. No effect was observed upon ectonucleotidase activities. CONCLUSIONS Our results demonstrate that chronic caffeine exposure in gestational and breastfeeding alters A1-mediated analgesic response in rats.
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Affiliation(s)
- Iraci L S Torres
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - José A F Assumpção
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Andressa de Souza
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, Brazil
| | - Carla de Oliveira
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Lauren N S Adachi
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Vanessa L Scarabelot
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Stefania G Cioato
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Joanna R Rozisky
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Wolnei Caumo
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Rosane S Silva
- Laboratório de Neuroquímica e Psicofarmacologia, Departamento de Biologia Celular e Molecular, Faculdade de Biociências, Pontifícia Universidade Católica do Rio Grande do Sul; Instituto Nacional de Ciência e Tecnologia Translacional em Medicina (INCT-TM), Porto Alegre, Brazil
| | - Ana Maria O Battastini
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Liciane F Medeiros
- Laboratório de Farmacologia da Dor e Neuromodulação: Investigações Pré-clínicas-Centro de Pesquisa Experimental (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil.,Grupo de Pesquisa e Pós-Graduação do Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Programa de Pós-Graduação em Saúde e Desenvolvimento Humano, Universidade La Salle, Canoas, Brazil
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Zhang D, Jin W, Liu H, Liang T, Peng Y, Zhang J, Zhang Y. ENT1 inhibition attenuates apoptosis by activation of cAMP/pCREB/Bcl2 pathway after MCAO in rats. Exp Neurol 2020; 331:113362. [PMID: 32445645 DOI: 10.1016/j.expneurol.2020.113362] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/15/2020] [Accepted: 05/18/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND PURPOSE The present study was designed to investigate the potential role and the mechanism of equilibrative nucleoside transporter 1 (ENT1) on neuronal apoptosis and neurological deficits after middle cerebral artery occlusion (MCAO) in rats. METHODS One hundred and thirty-four male Sprague-Dawley rats were subjected to two hours of MCAO followed by reperfusion. The time course of the expression level of ENT1 and phosphorylation of CREB were detected by western blot and immunofluorescence staining. Another set of animals were administrated with NBTI, the ENT1 inhibitor, by daily intraperitoneal injection starting at 0.5 h post-MCAO, infarction volume and neurological deficits were measured both at 24 h and 72 h post MCAO. We further explored the neuroprotection machenism by using H89, cAMP dependent protein kinase inhibitor, the expression of Bcl-2, Bax, phosphorylated CREB and Cleaved caspase-3 were quantified by Western blot, neuronal apoptosis were analyed by TUNEL staining. RESULTS The endogenous expression of ENT1 were significantly increased and peaked at 12 h after MCAO. High-dose of NBTI (15 mg/kg) reduced brain infarction volume and improved neurologic deficits both at 24 h and 72 h post MCAO. Moreover, NBTI significantly increased the level of CREB phosphorylation and extracellular adenosine concentration, and decreased the neuronal apoptosis 24 h after MCAO. NBTI treatment reduced the expression of Bax and cleaved caspase-3, while up-regulated Bcl-2 compared with vehicle group. These effects were abolished by H89 pretreatment. CONCLUSIONS ENT1 inhibition prevented neuronal apoptosis and improves neurological deficits through cAMP/PKA/CREB/Bcl-2 signaling pathway after MCAO in rats. ENT1 might be an effective target in the treatment strategy for ischemic stroke.
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Affiliation(s)
- Dongyun Zhang
- Department of rehabilitation medicine, First Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China; Department of neurology, Affiliated Hospital, Zunyi medical University, Zunyi, China
| | - Weidong Jin
- Department of Laboratory Medicine, First Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Hongliang Liu
- Department of rehabilitation medicine, First Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Tao Liang
- Department of neurology, Affiliated Hospital, Zunyi medical University, Zunyi, China
| | - Yan Peng
- Department of neurology, Affiliated Hospital, Zunyi medical University, Zunyi, China
| | - Jun Zhang
- Department of neurology, Affiliated Hospital, Zunyi medical University, Zunyi, China.
| | - Yang Zhang
- Department of Laboratory Medicine, Chongqing University Cancer Hospital, Chongqing, China.
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Antonioli L, Fornai M, Pellegrini C, Bertani L, Nemeth ZH, Blandizzi C. Inflammatory Bowel Diseases: It's Time for the Adenosine System. Front Immunol 2020; 11:1310. [PMID: 32849492 PMCID: PMC7403190 DOI: 10.3389/fimmu.2020.01310] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/22/2020] [Indexed: 12/16/2022] Open
Affiliation(s)
- Luca Antonioli
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Matteo Fornai
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | | | - Lorenzo Bertani
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Zoltan H Nemeth
- Department of Surgery, Morristown Medical Center, Morristown, NJ, United States.,Department of Anesthesiology, Columbia University Medical Center, New York, NY, United States
| | - Corrado Blandizzi
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
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35
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Beyond urate lowering: Analgesic and anti-inflammatory properties of allopurinol. Semin Arthritis Rheum 2020; 50:444-450. [DOI: 10.1016/j.semarthrit.2019.11.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 10/30/2019] [Accepted: 11/08/2019] [Indexed: 01/09/2023]
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Schneider ACA, Batisti AP, Turnes BL, Martins TC, Lisboa MEM, Custódio KM, Zanco J, Wilson KSC, Heymanns AC, Kanis LA, Magnago RF, Martins DF, Piovezan AP. Anti-hyperalgesic properties of ethanolic crude extract from the peels of Citrus reticulata (Rutaceae). AN ACAD BRAS CIENC 2020; 92:e20180793. [PMID: 32401835 DOI: 10.1590/0001-3765202020180793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 05/03/2019] [Indexed: 11/22/2022] Open
Abstract
The therapeutic effects from Citrus reticulata on painful inflammatory ailments are associated to its flavonoids constituent and phytochemical studies with Citrus genus affirm that the peels have important amounts of it. These bioactive compounds have been a considerable therapeutic source and evaluate potential application of the peel extract is significant. This research aims to investigate the influence of ethanolic crude extract from the peels of Citrus reticulata and its possible mechanism of action in different animal models of pain. The extract reduced hyperalgesia in the second phase of formalin test (vehicle: 501.5 ± 40.0 s; C. reticulata extract 300 mg/kg: 161.8 ± 41.1 s), in the carrageenan model (vehicle at 4th h: 82.5 ± 9.6 %; C. reticulata extract 300 mg/kg at 4th h: 47.5 ± 6.5 %) and in Complete Freund's Adjuvant model (vehicle: 501.5 ± 40.0 s; C. reticulata extract 300 mg/kg: 161.8 ± 41.1 s). The possible contribution of opioidergic and adenosinergic systems in the anti-hyperalgesic effect of C. reticulata extract was observed after treatment, with non-selective antagonists for both systems, which produced reversal effects. In conclusion, these properties of C. reticulata extract suggest a potential therapeutic benefit in treating painful conditions.
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Affiliation(s)
- Adriele C A Schneider
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Ana P Batisti
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Bruna L Turnes
- Departamento de Ciências Fisiológicas, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Thiago C Martins
- Departamento de Ciências Fisiológicas, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Maria E M Lisboa
- Laboratório de Neurociência Experimental (LaNex), Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Kauê M Custódio
- Grupo de Pesquisa em Tecnologia Farmacêutica, Universidade do Sul de Santa Catarina/UNISUL, Tubarão, SC, Brazil
| | - Jasper Zanco
- Curso de Naturologia, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Karen S C Wilson
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Ana Caroline Heymanns
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Luiz A Kanis
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Rachel F Magnago
- Curso de Medicina, Universidade do Sul de Santa Catarina/ UNISUL, Palhoça, SC, Brazil
| | - Daniel F Martins
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
| | - Anna P Piovezan
- Programa de Pós-graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina/UNISUL, Palhoça, SC, Brazil
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Shakya AK, Naik RR, Almasri IM, Kaur A. Role and Function of Adenosine and its Receptors in Inflammation, Neuroinflammation, IBS, Autoimmune Inflammatory Disorders, Rheumatoid Arthritis and Psoriasis. Curr Pharm Des 2020; 25:2875-2891. [PMID: 31333103 DOI: 10.2174/1381612825666190716145206] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 07/04/2019] [Indexed: 12/11/2022]
Abstract
The physiological effects of endogenous adenosine on various organ systems are very complex and numerous which are elicited upon activation of any of the four G-protein-coupled receptors (GPCRs) denoted as A1, A2A, A2B and A3 adenosine receptors (ARs). Several fused heterocyclic and non-xanthine derivatives are reported as a possible target for these receptors due to physiological problems and lack of selectivity of xanthine derivatives. In the present review, we have discussed the development of various new chemical entities as a target for these receptors. In addition, compounds acting on adenosine receptors can be utilized in treating diseases like inflammation, neuroinflammation, autoimmune and related diseases.
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Affiliation(s)
- Ashok K Shakya
- Medicinal Chemistry, Drug Design and Drug Metabolism, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Al- Ahliyya Amman University, PO Box 263, Amman 19328, Jordan
| | - Rajashri R Naik
- Department of Medical Laboratory Sciences, Faculty of Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19328, Jordan
| | - Ihab M Almasri
- Medicinal Chemistry and Drug Design, Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmacy, Al Azhar University Gaza, Gaza Strip, Palestinian Territory, Occupied
| | - Avneet Kaur
- Department of Pharmaceutical Chemistry, Delhi Institute of Pharmaceutical Sciences and Research (DIPSAR), Mehrauli-Badarpur Road, Pushp Vihar, Sector-3, New Delhi-110017, India
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Choudhury H, Chellappan DK, Sengupta P, Pandey M, Gorain B. Adenosine Receptors in Modulation of Central Nervous System Disorders. Curr Pharm Des 2020; 25:2808-2827. [PMID: 31309883 DOI: 10.2174/1381612825666190712181955] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 07/01/2019] [Indexed: 12/20/2022]
Abstract
The ubiquitous signaling nucleoside molecule, adenosine is found in different cells of the human body to provide its numerous pharmacological role. The associated actions of endogenous adenosine are largely dependent on conformational change of the widely expressed heterodimeric G-protein-coupled A1, A2A, A2B, and A3 adenosine receptors (ARs). These receptors are well conserved on the surface of specific cells, where potent neuromodulatory properties of this bioactive molecule reflected by its easy passage through the rigid blood-brainbarrier, to simultaneously act on the central nervous system (CNS). The minimal concentration of adenosine in body fluids (30-300 nM) is adequate to exert its neuromodulatory action in the CNS, whereas the modulatory effect of adenosine on ARs is the consequence of several neurodegenerative diseases. Modulatory action concerning the activation of such receptors in the CNS could be facilitated towards neuroprotective action against such CNS disorders. Our aim herein is to discuss briefly pathophysiological roles of adenosine on ARs in the modulation of different CNS disorders, which could be focused towards the identification of potential drug targets in recovering accompanying CNS disorders. Researches with active components with AR modulatory action have been extended and already reached to the bedside of the patients through clinical research in the improvement of CNS disorders. Therefore, this review consist of recent findings in literatures concerning the impact of ARs on diverse CNS disease pathways with the possible relevance to neurodegeneration.
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Affiliation(s)
- Hira Choudhury
- School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur, Malaysia
| | - Dinesh K Chellappan
- School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur, Malaysia
| | - Pallav Sengupta
- Department of Physiology, Faculty of Medicine, MA`HSA University, Kuala Lumpur, Malaysia
| | - Manisha Pandey
- School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur, Malaysia
| | - Bapi Gorain
- School of Pharmacy, Faculty of Health and Medical Science, Taylor's University, Subang Jaya, Selangor, Malaysia
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Premnath S, Alalshaikh G, Alfotawi R, Philip M. The Association Between Coffee Consumption and Local Anesthesia Failure: Social Beliefs and Scientific Evidence. Cureus 2020; 12:e7820. [PMID: 32467795 PMCID: PMC7249765 DOI: 10.7759/cureus.7820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 04/23/2020] [Indexed: 01/12/2023] Open
Abstract
Introduction In our clinical practice, we have encountered patients who reported the failure of local anesthesia due to excessive coffee consumption and required higher-than-normal doses of local anesthesia. Therefore, our study aimed to assess the awareness and knowledge of coffee consumption, its effect on local anesthesia, and the available scientific evidence among the public, patients, and clinicians in dental practice. Material and Methods A cross-sectional survey with two sets of questionnaires was designed based on the Likert scale. A 5-point scale was used to assess agreement and frequency. Yes/no and open-ended questions were used for the assessment. Questionnaires were distributed among the clinicians, patients, and the public. Data were analyzed with descriptive linear statistics. Results Of the 430 responses provided by patients and the general public, more than 40% believed that the local anesthetic failure was caused by excessive coffee consumption. Among the 235 responses provided by the clinicians, 65% of the clinicians reported encountering patients with local anesthesia failure and believed it could be due to excessive coffee consumption. However, only 9% of the clinicians were aware of scientific evidence regarding the effect of coffee consumption on local anesthesia failure. Conclusion Surprisingly, the majority of clinicians believed that caffeine had an effect on the reduction of local anesthesia; however, only a few of them had scientific knowledge. The available scientific evidence relates that caffeine can influence cognitive performance by increasing alertness, as well as sleep deprivation causing stress and anxiety, which partially explains the local anesthetic failure among coffee consumers. Therefore, a stress reduction protocol should be a routine daily practice for a dentist to reduce the failure rate of local anesthesia.
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Affiliation(s)
- Sangeetha Premnath
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
| | - Ghadah Alalshaikh
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
| | - Randa Alfotawi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
| | - Manju Philip
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
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Dal Ben D, Antonioli L, Lambertucci C, Spinaci A, Fornai M, D'Antongiovanni V, Pellegrini C, Blandizzi C, Volpini R. Approaches for designing and discovering purinergic drugs for gastrointestinal diseases. Expert Opin Drug Discov 2020; 15:687-703. [PMID: 32228110 DOI: 10.1080/17460441.2020.1743673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Purines finely modulate physiological motor, secretory, and sensory functions in the gastrointestinal tract. Their activity is mediated by the purinergic signaling machinery, including receptors and enzymes regulating their synthesis, release, and degradation. Several gastrointestinal dysfunctions are characterized by alterations affecting the purinergic system. AREAS COVERED The authors provide an overview on the purinergic receptor signaling machinery, the molecules and proteins involved, and a summary of medicinal chemistry efforts aimed at developing novel compounds able to modulate the activity of each player involved in this machinery. The involvement of purinergic signaling in gastrointestinal motor, secretory, and sensory functions and dysfunctions, and the potential therapeutic applications of purinergic signaling modulators, are then described. EXPERT OPINION A number of preclinical and clinical studies demonstrate that the pharmacological manipulation of purinergic signaling represents a viable way to counteract several gastrointestinal diseases. At present, the paucity of purinergic therapies is related to the lack of receptor-subtype-specific agonists and antagonists that are effective in vivo. In this regard, the development of novel therapeutic strategies should be focused to include tools able to control the P1 and P2 receptor expression as well as modulators of the breakdown or transport of purines.
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Affiliation(s)
- Diego Dal Ben
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino , Camerino, Italy
| | - Luca Antonioli
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa , Pisa, Italy
| | - Catia Lambertucci
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino , Camerino, Italy
| | - Andrea Spinaci
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino , Camerino, Italy
| | - Matteo Fornai
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa , Pisa, Italy
| | - Vanessa D'Antongiovanni
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa , Pisa, Italy
| | | | - Corrado Blandizzi
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa , Pisa, Italy
| | - Rosaria Volpini
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino , Camerino, Italy
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Madeira F, Brito RND, Emer AA, Batisti AP, Turnes BL, Salgado ASI, Cidral-Filho FJ, Mazzardo-Martins L, Martins DF. The role of spinal inhibitory neuroreceptors in the antihyperalgesic effect of warm water immersion therapy. Braz J Phys Ther 2020; 25:56-61. [PMID: 32070652 DOI: 10.1016/j.bjpt.2020.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 11/21/2019] [Accepted: 02/04/2020] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE Warm water immersion therapy (WWIT) has been widely used in the treatment of various clinical conditions, with analgesic and anti-inflammatory effects. However, its mechanism of action has not been fully investigated. The present study analyzed the role of spinal inhibitory neuroreceptors in the antihyperalgesic effect of WWIT in an experimental model of inflammatory pain. METHODS Mice were injected with complete Freund's adjuvant (CFA; intraplantar [i.pl.]). Paw withdrawal frequency to mechanical stimuli (von Frey test) was used to determine: (1) the effect of intrathecal (i.t.) preadministration of naloxone (a non-selective opioid receptor antagonist; 5 µg/5 µl), (2); AM281 (a selective cannabinoid receptor type 1 [CB1] antagonist; 2 µg/5 µl), (3); and 1,3-dipropyl-8-cyclopentylxanthine (DPCPX; a selective adenosine A1 receptor antagonist; 10 nmol/5 µl), on the antihyperalgesic (pain-relieving) effect of WWIT against CFA-induced hyperalgesia. RESULTS Intrathecal naloxone, AM281, and DPCPX significantly prevented the antihyperalgesic effect of WWIT. This study suggests the involvement of spinal (central) receptors in the antihyperalgesic effect of WWIT in a model of inflammatory pain. CONCLUSIONS Taken together, these results suggest that opioid, CB1, and A1 spinal receptors might contribute to the pain-relieving effect of WWIT.
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Affiliation(s)
- Fernanda Madeira
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil
| | - Rômulo Nolasco de Brito
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil
| | - Aline A Emer
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil
| | - Ana Paula Batisti
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil
| | - Bruna Lenfers Turnes
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Laboratory of Bioenergetics and Oxidative Stress (LABOX), Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Afonso Shiguemi Inoue Salgado
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Coordinator of Integrative Physical Therapy Residency, Centro Universitário Filadélfia, Londrina, PR, Brazil
| | - Francisco José Cidral-Filho
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil
| | - Leidiane Mazzardo-Martins
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Daniel Fernandes Martins
- Experimental Neuroscience Laboratory (LaNEx), Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, Universidade do Sul de Santa Catarina, Palhoça, SC, Brazil.
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A Role for The P2Y1 Receptor in Nonsynaptic Cross-depolarization in the Rat Dorsal Root Ganglia. Neuroscience 2019; 423:98-108. [PMID: 31689490 DOI: 10.1016/j.neuroscience.2019.09.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/19/2019] [Accepted: 09/27/2019] [Indexed: 12/19/2022]
Abstract
Non-synaptic transmission is pervasive throughout the nervous system. It appears especially prevalent in peripheral ganglia, where non-synaptic interactions between neighboring cell bodies have been described in both physiological and pathological conditions, a phenomenon referred to as cross-depolarization (CD) and thought to play a role in sensory processing and chronic pain. CD has been proposed to be mediated by a chemical agent, but its identity has remained elusive. Here, we report that in the rat dorsal root ganglion (DRG), the P2Y1 purinergic receptor (P2RY1) plays an important role in regulating CD. The effect of P2RY1 is cell-type specific: pharmacological blockade of P2RY1 inhibited CD in A-type neurons while enhancing it in C-type neurons. In the nodose ganglion of the vagus, CD requires extracellular calcium in a large percentage of cells. In contrast, we show that in the DRG extracellular calcium appears to play no major role, pointing to a mechanistic difference between the two peripheral ganglia. Furthermore, we show that DRG glial cells also play a cell-type specific role in CD regulation. Fluorocitrate-induced glial inactivation had no effect on A-cells but enhanced CD in C-cells. These findings shed light on the mechanism of CD in the DRG and pave the way for further analysis of non-synaptic neuronal communication in sensory ganglia.
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Assessment of anti-nociceptive effect of allopurinol in a neuropathic pain model. Brain Res 2019; 1720:146238. [DOI: 10.1016/j.brainres.2019.04.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 04/11/2019] [Accepted: 04/29/2019] [Indexed: 01/01/2023]
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Farzad B, Rajabi H, Gharakhanlou R, Allison DJ, Hayat P, Jameie SB. Swimming Training Attenuates Allodynia and Hyperalgesia Induced by Peripheral Nerve Injury in an Adult Male Rat Neuropathic Model: Effects on Irisin and GAD65. PAIN MEDICINE 2019; 19:2236-2245. [PMID: 29315430 DOI: 10.1093/pm/pnx294] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Objective The analgesic mechanism of long-lasting exercise on neuropathic pain is not well understood. This study explored the effects of swimming training on neuropathic pain and the expression of irisin, GAD65, and P2X3 after chronic constriction injury (CCI) of the sciatic nerve. Methods Thirty-five male rats were randomly assigned to one of the following five groups: 1) no CCI or swimming (control); 2) swimming without CCI (SW); 3) swimming with CCI (CCISW); 4) CCI without swimming (CCI); and 5) sham CCI surgery (sham CCI). Behavioral responses to mechanical, cold, and heat stimuli were tested before and after CCI surgery, as well as each week throughout the four weeks of swimming training. The expression of irisin, GAD65, and P2X3 proteins in L4-L6 spinal cord segment, ipsilateral to the nerve injury, were evaluated by western blotting. Results Mechanical hyperalgesia was alleviated between the second and fourth weeks of training in the CCISW group. In the tactile allodynia and heat hyperalgesia tests, withdrawal thresholds of the CCISW group were significantly higher than the CCI group at the third and fourth week of training (P < 0.05), while cold allodynia showed delayed improvement occurring by the fourth week of training. The expression of irisin was lower in the CCISW and SW groups compared with the CCI group at day 33 post-CCI surgery. Moreover, CCI surgery significantly decreased the protein expression of GAD65 in L4-L6 spinal cord segments (P = 0.018), whereas swimming training prevented the decline of GAD65 in the CCISW group. Conclusions Our findings showed that four weeks of swimming training produce beneficial rehabilitative effects on neuropathic pain symptoms. The analgesic effect of swimming training is partially related to the increase of GAD65. The beneficial role of irisin in neuropathic pain will require further investigation.
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Affiliation(s)
- Babak Farzad
- Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Physical Education & Sports Science, Faculty of Humanities, Azad University, Tehran North Branch, Tehran, Iran
| | - Hamid Rajabi
- Department of Exercise Physiology, Faculty of Physical Education & Sports Science, Kharazmi University, Tehran, Iran
| | - Reza Gharakhanlou
- Department of Physical Education and Sports Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran
| | - David J Allison
- Department of Kinesiology, Brock University, St Catharines, Ontario, Canada
| | - Parisa Hayat
- Cellular & Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Behnamedin Jameie
- Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Basic Sciences, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
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Jarvis MF. Therapeutic potential of adenosine kinase inhibition-Revisited. Pharmacol Res Perspect 2019; 7:e00506. [PMID: 31367385 PMCID: PMC6646803 DOI: 10.1002/prp2.506] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/25/2019] [Accepted: 06/26/2019] [Indexed: 12/13/2022] Open
Abstract
Adenosine (ADO) is an endogenous protective regulator that restores cellular energy balance in response to tissue trauma. Extracellular ADO has a half-life of the order of seconds thus restricting its actions to tissues and cellular sites where it is released. Adenosine kinase (AK, ATP:adenosine 5'-phosphotransferase, EC 2.7.1.20) is a cytosolic enzyme that is the rate-limiting enzyme controlling extracellular ADO concentrations. Inhibition of AK can effectively increase ADO extracellular concentrations at tissue sites where pathophysiological changes occur. Highly potent and selective nucleoside and non-nucleoside AK inhibitors were discovered in the late 1990s that showed in vivo effects consistent with the augmentation of the actions of endogenous ADO in experimental models of pain, inflammation, and seizure activity. These data supported clinical development of several AK inhibitors for the management of epilepsy and chronic pain. However, early toxicological data demonstrated that nucleoside and non-nucleoside chemotypes produced hemorrhagic microfoci in brain in an apparent ADO receptor-dependent fashion. An initial oral report of these important toxicological findings was presented at an international conference but a detailed description of these data has not appeared in the peer-reviewed literature. In the two decades following the demise of these early AK-based clinical candidates, interest in AK inhibition has renewed based on preclinical data in the areas of renal protection, diabetic retinopathy, cardioprotection, and neurology. This review provides a summary of the pharmacology and toxicology data for several AK inhibitor chemotypes and the resulting translational issues associated with the development of AK inhibitors as viable therapeutic interventions.
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Roldan CJ, Lo TC, Huh B. Recurrence of complex regional pain syndrome after administration of adenosine. Pain Manag 2019; 9:233-237. [PMID: 31140915 DOI: 10.2217/pmt-2018-0059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background: The effects of adenosine in acute chronic pain are not clear. Literature supports both a pronociceptive/inflammatory role of the A2aR/A2bR and antihyperalgesia/allodynia with A1Rs/A3Rs. Adenosine could participate in the reactivation of chronic regional pain syndrome (CRPS) through inflammatory pathways and via A2Rs. Plastic changes in the brain CRPS-related overlap with those seen in systemic inflammation and persist even after symptoms of CRPS resolve. Aim: To illustrate the hypothesis that intravenous adenosine can reactivate dormant CRPS. Case report: An individual with successfully treated CRPS developed supraventricular tachycardia, he was treated with intravenous adenosine. Shortly after a second dose, he developed severe pain at a lower limb from relapsed CRPS. Treatment included lumbar sympathetic block, physical therapy and pharmacological agents. Conclusion: Intravenous adenosine can reactivate dormant CRPS. Its potential pronociceptive role in CRPS calls for further studies to better elucidate the underlying mechanisms.
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Affiliation(s)
- Carlos J Roldan
- Department of Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.,Department of Emergency Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Tony Ct Lo
- Department of Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Billy Huh
- Department of Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Yudin Y, Rohacs T. Inhibitory G i/O-coupled receptors in somatosensory neurons: Potential therapeutic targets for novel analgesics. Mol Pain 2018; 14:1744806918763646. [PMID: 29580154 PMCID: PMC5882016 DOI: 10.1177/1744806918763646] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Primary sensory neurons in the dorsal root ganglia and trigeminal ganglia are responsible for sensing mechanical and thermal stimuli, as well as detecting tissue damage. These neurons express ion channels that respond to thermal, mechanical, or chemical cues, conduct action potentials, and mediate transmitter release. These neurons also express a large number of G-protein coupled receptors, which are major transducers for extracellular signaling molecules, and their activation usually modulates the primary transduction pathways. Receptors that couple to phospholipase C via heterotrimeric Gq/11 proteins and those that activate adenylate cyclase via Gs are considered excitatory; they positively regulate somatosensory transduction and they play roles in inflammatory sensitization and pain, and in some cases also in inducing itch. On the other hand, receptors that couple to Gi/o proteins, such as opioid or GABAB receptors, are generally inhibitory. Their activation counteracts the effect of Gs-stimulation by inhibiting adenylate cyclase, as well as exerts effects on ion channels, usually resulting in decreased excitability. This review will summarize knowledge on Gi-coupled receptors in sensory neurons, focusing on their roles in ion channel regulation and discuss their potential as targets for analgesic and antipruritic medications.
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Affiliation(s)
- Yevgen Yudin
- 1 Department of Pharmacology, Physiology and Neuroscience, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Tibor Rohacs
- 1 Department of Pharmacology, Physiology and Neuroscience, Rutgers New Jersey Medical School, Newark, NJ, USA
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Rosas RF, Emer AA, Batisti AP, Ludtke DD, Turnes BL, Bobinski F, Cidral-Filho FJ, Martins DF. Far infrared-emitting ceramics decrease Freund's adjuvant-induced inflammatory hyperalgesia in mice through cytokine modulation and activation of peripheral inhibitory neuroreceptors. JOURNAL OF INTEGRATIVE MEDICINE-JIM 2018; 16:396-403. [PMID: 30139655 DOI: 10.1016/j.joim.2018.08.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 06/22/2018] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The present study aimed to evaluate the analgesic and anti-inflammatory effects of far infrared-emitting ceramics (cFIRs) in a model of persistent inflammatory hyperalgesia and to elucidate the possible mechanisms of these effects. METHODS Mice were injected with complete Freund's adjuvant (CFA) and treated with cFIRs via placement on a pad impregnated with cFIRs on the bottom of the housing unit for different periods of time. Mice underwent mechanical hyperalgesia and edema assessments, and tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and IL-10 levels were measured. Twenty-four hours after CFA injection and 30 min before cFIR treatment, mice were pretreated with a nonselective adenosinergic antagonist, caffeine, the selective adenosine receptor A1 antagonist, 1,3-dipropyl-8-cyclopentylxanthine (DPCPX), the selective cannabinoid receptor type 1 antagonist, AM281, the selective cannabinoid receptor type 2 antagonist, AM630, or the nonselective opioid receptor antagonist, naloxone, and mechanical hyperalgesia was assessed. RESULTS cFIRs statistically (P < 0.05) decreased CFA-induced mechanical hyperalgesia ((82.86 ± 5.21)% in control group vs (56.67 ± 9.54)% in cFIR group) and edema ((1699.0 ± 77.8) μm in control group vs (988.7 ± 107.6) μm in cFIR group). cFIRs statistically (P < 0.05) reduced TNF-α ((0.478 ± 0.072) pg/mg of protein in control group vs (0.273 ± 0.055) pg/mg of protein in cFIR group) and IL-1β ((95.81 ± 3.95) pg/mg of protein in control group vs (80.61 ± 4.71) pg/mg of protein in cFIR group) levels and statistically (P < 0.05) increased IL-10 ((18.32 ± 0.78) pg/mg of protein in control group vs (25.89 ± 1.23) pg/mg of protein in cFIR group) levels in post-CFA-injected paws. Peripheral pre-administration of inhibitory neuroreceptor antagonists (caffeine, DPCPX, AM281, AM630 and naloxone) prevented the analgesic effects of cFIRs (P < 0.05). CONCLUSION These data provide additional support for the use of cFIRs in the treatment of painful inflammatory conditions and contribute to our understanding of the neurobiological mechanisms of the therapeutic effects of cFIRs.
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Affiliation(s)
- Ralph Fernando Rosas
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil
| | - Aline Armiliato Emer
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil
| | - Ana Paula Batisti
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil
| | - Daniela Dero Ludtke
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil
| | - Bruna Lenfers Turnes
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Laboratory of Bioenergetics and Oxidative Stress (LABOX), Federal University of Santa Catarina, Florianópolis 88049-000, Santa Catarina, Brazil
| | - Franciane Bobinski
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil
| | - Francisco José Cidral-Filho
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil
| | - Daniel Fernandes Martins
- Experimental Neuroscience Laboratory (LaNEx), University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça 88137-272, Santa Catarina, Brazil.
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Acupuncture and Neural Mechanism in the Management of Low Back Pain-An Update. MEDICINES 2018; 5:medicines5030063. [PMID: 29941854 PMCID: PMC6164863 DOI: 10.3390/medicines5030063] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 06/13/2018] [Accepted: 06/21/2018] [Indexed: 12/20/2022]
Abstract
Within the last 10 years, the percentage of low back pain (LBP) prevalence increased by 18%. The management and high cost of LBP put a tremendous burden on the healthcare system. Many risk factors have been identified, such as lifestyle, trauma, degeneration, postural impairment, and occupational related factors; however, as high as 95% of the cases of LBP are non-specific. Currently, LBP is treated pharmacologically. Approximately 25 to 30% of the patients develop serious side effects, such as drowsiness and drug addiction. Spinal surgery often does not result in a massive improvement of pain relief. Therefore, complementary approaches are being integrated into the rehabilitation programs. These include chiropractic therapy, physiotherapy, massage, exercise, herbal medicine and acupuncture. Acupuncture for LBP is one of the most commonly used non-pharmacological pain-relieving techniques. This is due to its low adverse effects and cost-effectiveness. Currently, many randomized controlled trials and clinical research studies have produced promising results. In this article, the causes and incidence of LBP on global health care are reviewed. The importance of treatment by acupuncture is considered. The efforts to reveal the link between acupuncture points and anatomical features and the neurological mechanisms that lead to acupuncture-induced analgesic effect are reviewed.
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Antiepileptic drugs as analgesics/adjuvants in inflammatory pain: current preclinical evidence. Pharmacol Ther 2018; 192:42-64. [PMID: 29909236 DOI: 10.1016/j.pharmthera.2018.06.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/04/2018] [Indexed: 12/20/2022]
Abstract
Inflammatory pain is the most common type of pain that is treated clinically. The use of currently available treatments (classic analgesics - NSAIDs, paracetamol and opioids) is limited by insufficient efficacy and/or side effects/tolerance development. Antiepileptic drugs (AEDs) are widely used in neuropathic pain treatment, but there is substantial preclinical evidence on their efficacy against inflammatory pain, too. In this review we focus on gabapentinoids (gabapentin and pregabalin) and dibenzazepine AEDs (carbamazepine, oxcarbazepine, and recently introduced eslicarbazepine acetate) and their potential for relieving inflammatory pain. In models of somatic, visceral and trigeminal inflammatory pain, that have a translational value for inflammatory conditions in locomotor system, viscera and head/face, AEDs have demonstrated analgesic activity. This activity was mostly consistent, dependent on the dose and largely independent on the site of inflammation and method of its induction, nociceptive stimuli, species, specific drug used, its route of administration and dosing schedule. AEDs exerted comparable efficacy with classic analgesics. Effective doses of AEDs are lower than toxic doses in animals and, when expressed as equivalent human doses, they are largely overlapping with AEDs doses already used in humans for treating epilepsy/neuropathic pain. The main mechanism of antinociceptive/antihyperalgesic action of gabapentinoids in inflammatory pain models seems to be α2δ-dependent suppression of voltage-gated calcium channels in primary sensory neurons that leads to reduced release of neurotransmitters in the spinal/medullar dorsal horn. The suppression of NMDA receptors via co-agonist binding site primarily at spinal sites, activation of various types of K+ channels at spinal and peripheral sites, and activation of noradrenergic and serotonergic descending pain modulatory pathways may also contribute. Inhibition of voltage-gated sodium channels along the pain pathway is probably the main mechanism of antinociceptive/antihyperalgesic effects of dibenzazepines. The recruitment of peripheral adrenergic and purinergic mechanisms and central GABAergic mechanisms may also contribute. When co-administered with classic/other alternative analgesics, AEDs exerted synergistic/additive interactions. Reviewed data could serve as a basis for clinical studies on the efficacy/safety of AEDs as analgesics/adjuvants in patients with inflammatory pain, and contribute to the improvement of the treatment of various inflammatory pain states.
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