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Baek IS, Choi S, Yoon H, Chung G, Kim SK. Analgesic Effect of Auricular Vagus Nerve Stimulation on Oxaliplatin-induced Peripheral Neuropathic Pain in a Rodent Model. Exp Neurobiol 2024; 33:129-139. [PMID: 38993080 PMCID: PMC11247280 DOI: 10.5607/en24012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/13/2024] Open
Abstract
Cancer chemotherapy often triggers peripheral neuropathy in patients, leading to neuropathic pain in the extremities. While previous research has explored various nerve stimulation to alleviate chemotherapy-induced peripheral neuropathy (CIPN), evidence on the effectiveness of noninvasive auricular vagus nerve stimulation (aVNS) remains uncertain. This study aimed to investigate the efficacy of non-invasive aVNS in relieving CIPN pain. To induce CIPN in experimental animals, oxaliplatin was intraperitoneally administered to rats (6 mg/kg). Mechanical and cold allodynia, the representative symptoms of neuropathic pain, were evaluated using the von Frey test and acetone test, respectively. The CIPN animals were randomly assigned to groups and treated with aVNS (5 V, square wave) at different frequencies (2, 20, or 100 Hz) for 20 minutes. Results revealed that 20 Hz aVNS exhibited the most pronounced analgesic effect, while 2 or 100 Hz aVNS exhibited weak effects. Immunohistochemistry analysis demonstrated increased c-Fos expression in the locus coeruleus (LC) in the brain of CIPN rats treated with aVNS compared to sham treatment. To elucidate the analgesic mechanisms involving the adrenergic descending pathway, α1-, α2-, or β-adrenergic receptor antagonists were administered to the spinal cord before 20 Hz aVNS. Only the β-adrenergic receptor antagonist, propranolol, blocked the analgesic effect of aVNS. These findings suggest that 20 Hz aVNS may effectively alleviate CIPN pain through β-adrenergic receptor activation.
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Affiliation(s)
- In Seon Baek
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Seunghwan Choi
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Heera Yoon
- Division of Preclinical R&D, Neurogrin Inc., Seoul 02447, Korea
| | - Geehoon Chung
- Division of Preclinical R&D, Neurogrin Inc., Seoul 02447, Korea
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Sun Kwang Kim
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea
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2
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Iseppon F, Luiz AP, Linley JE, Wood JN. Pregabalin Silences Oxaliplatin-Activated Sensory Neurons to Relieve Cold Allodynia. eNeuro 2023; 10:ENEURO.0395-22.2022. [PMID: 36720644 PMCID: PMC9998121 DOI: 10.1523/eneuro.0395-22.2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/05/2022] [Accepted: 12/30/2022] [Indexed: 02/02/2023] Open
Abstract
Oxaliplatin is a platinum-based chemotherapeutic agent that causes cold and mechanical allodynia in up to 90% of patients. Silent Nav1.8-positive nociceptive cold sensors have been shown to be unmasked by oxaliplatin, and this event has been causally linked to the development of cold allodynia. We examined the effects of pregabalin on oxaliplatin-evoked unmasking of cold sensitive neurons using mice expressing GCaMP-3 in all sensory neurons. Intravenous injection of pregabalin significantly ameliorates cold allodynia, while decreasing the number of cold sensitive neurons by altering their excitability and temperature thresholds. The silenced neurons are predominantly medium/large mechano-cold sensitive neurons, corresponding to the "silent" cold sensors activated during neuropathy. Deletion of α2δ1 subunits abolished the effects of pregabalin on both cold allodynia and the silencing of sensory neurons. Thus, these results define a novel, peripheral inhibitory effect of pregabalin on the excitability of "silent" cold-sensing neurons in a model of oxaliplatin-dependent cold allodynia.
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Affiliation(s)
- Federico Iseppon
- Molecular Nociception Group, Wolfson Institute for Biomedical Research, University College London, London WC1E 6BT, United Kingdom
- Discovery UK, Neuroscience, Biopharmaceuticals R&D, AstraZeneca, Cambridge CB21 6GH, United Kingdom
| | - Ana P Luiz
- Molecular Nociception Group, Wolfson Institute for Biomedical Research, University College London, London WC1E 6BT, United Kingdom
| | - John E Linley
- Discovery UK, Neuroscience, Biopharmaceuticals R&D, AstraZeneca, Cambridge CB21 6GH, United Kingdom
| | - John N Wood
- Molecular Nociception Group, Wolfson Institute for Biomedical Research, University College London, London WC1E 6BT, United Kingdom
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3
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Smith MT. Nonopioid analgesics discovery and the Valley of Death: EMA401 from concept to clinical trial. Pain 2022; 163:S15-S28. [PMID: 35984369 PMCID: PMC10578428 DOI: 10.1097/j.pain.0000000000002675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/22/2022] [Accepted: 04/28/2022] [Indexed: 12/23/2022]
Affiliation(s)
- Maree T Smith
- Centre for Integrated Preclinical Drug Development, School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
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4
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Antinociceptive and Antiallodynic Activity of Some 3-(3-Methylthiophen-2-yl)pyrrolidine-2,5-dione Derivatives in Mouse Models of Tonic and Neuropathic Pain. Int J Mol Sci 2022; 23:ijms23074057. [PMID: 35409413 PMCID: PMC8999233 DOI: 10.3390/ijms23074057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/01/2022] [Accepted: 04/04/2022] [Indexed: 11/16/2022] Open
Abstract
Antiseizure drugs (ASDs) are commonly used to treat a wide range of nonepileptic conditions, including pain. In this context, the analgesic effect of four pyrrolidine-2,5-dione derivatives (compounds 3, 4, 6, and 9), with previously confirmed anticonvulsant and preliminary antinociceptive activity, was assessed in established pain models. Consequently, antinociceptive activity was examined in a mouse model of tonic pain (the formalin test). In turn, antiallodynic and antihyperalgesic activity were examined in the oxaliplatin-induced model of peripheral neuropathy as well as in the streptozotocin-induced model of painful diabetic neuropathy in mice. In order to assess potential sedative properties (drug safety evaluation), the influence on locomotor activity was also investigated. As a result, three compounds, namely 3, 6, and 9, demonstrated a significant antinociceptive effect in the formalin-induced model of tonic pain. Furthermore, these substances also revealed antiallodynic properties in the model of oxaliplatin-induced peripheral neuropathy, while compound 3 attenuated tactile allodynia in the model of diabetic streptozotocin-induced peripheral neuropathy. Apart from favorable analgesic properties, the most active compound 3 did not induce any sedative effects at the active dose of 30 mg/kg after intraperitoneal (i.p.) injection.
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5
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Yongning Z, Xianguang L, Hengling C, Su C, Fang L, Chenhong L. The hyperpolarization-activated cyclic nucleotide-gated channel currents contribute to oxaliplatin-induced hyperexcitability of DRG neurons. Somatosens Mot Res 2020; 38:11-19. [PMID: 33092457 DOI: 10.1080/08990220.2020.1834376] [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] [Indexed: 10/23/2022]
Abstract
Humans are likely to experience mechanical allodynia and cold hyperalgesia after oxaliplatin intravenous injection. The mechanism by which oxaliplatin leads to these side effects is unknown. Since the hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are involved in the automatic depolarization of action potentials, we speculated that HCN channels are involved in oxaliplatin-induced hyperalgesia through action potentials. Our results showed that the density of HCN channel currents and the excitability of dorsal root ganglion neurons both increased after oxaliplatin perfusion at the cellular level. The neuronal hyperexcitability could be alleviated by ivabradine. Ivabradine inhibited oxaliplatin-induced mechanical allodynia and cold hyperalgesia at the individual rat level. Oxaliplatin enhanced the function of HCN channels, which in turn promoted the automatic depolarization of action potentials. The acceleration of automatic depolarization excited the neurons and caused more rapid firing of action potentials. Therefore, the HCN channel is a potential therapeutic target for the hyperalgesia induced by oxaliplatin.
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Affiliation(s)
- Zhang Yongning
- The Laboratory of Membrane Ion Channels and Medicine, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumour Diagnosis & Treatment, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, P.R. China
| | - Lin Xianguang
- The Laboratory of Membrane Ion Channels and Medicine, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumour Diagnosis & Treatment, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, P.R. China
| | - Chen Hengling
- The Laboratory of Membrane Ion Channels and Medicine, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumour Diagnosis & Treatment, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, P.R. China
| | - Chen Su
- The Laboratory of Membrane Ion Channels and Medicine, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumour Diagnosis & Treatment, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, P.R. China
| | - Luo Fang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Li Chenhong
- The Laboratory of Membrane Ion Channels and Medicine, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumour Diagnosis & Treatment, College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, P.R. China
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6
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Comparison of the Efficacy and Safety of Pregabalin and Duloxetine in Taxane-Induced Sensory Neuropathy: A Randomized Controlled Trial. Clin Drug Investig 2020; 40:249-257. [DOI: 10.1007/s40261-019-00882-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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7
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Su X, Wu B, Zhang W, Ji YH, Wang Q, Tan ZY. Inhibitory Effects of Columbianadin on Nociceptive Behaviors in a Neuropathic Pain Model, and on Voltage-Gated Calcium Currents in Dorsal Root Ganglion Neurons in Mice. Front Pharmacol 2020; 10:1522. [PMID: 31998126 PMCID: PMC6970200 DOI: 10.3389/fphar.2019.01522] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 11/25/2019] [Indexed: 12/30/2022] Open
Abstract
Radix angelicae pubescentis (RAP) has been used in Chinese traditional medicine to treat painful diseases such as rheumatism and headache. A previous study has reported that columbianadin (CBN), a major coumarin in RAP inhibits acute and inflammatory pain behaviors. However, the effects of CBN on neuropathic pain behaviors, and the potential underlying mechanism have not been reported. In the present study, the effects of CBN, compared to another major coumarin of RAP osthole (OST), on oxaliplatin-induced neuropathic pain behaviors and on the voltage-gated calcium currents in small dorsal root ganglion (DRG) neurons were studied in mice. It was found that CBN and OST inhibited both mechanical and cold hypersensitivity induced by oxaliplatin. Moreover, CBN and OST might preferentially inhibit T- and L-type calcium currents (Ica). The inhibitory effects of CBN and OST on the oxaliplatin-induced mechanical allodynia were prevented by gabapentin. These results suggest that CBN, as well as OST might inhibit neuropathic pain behaviors through an inhibition of T- and L-type calcium currents in nociceptive DRG neurons.
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Affiliation(s)
- Xiaolin Su
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Harbin, China.,Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Bin Wu
- Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States.,Institute of Special Environment Medicine, Nantong University, Nantong, China
| | - Wentong Zhang
- Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Yong-Hua Ji
- Lab of Neuropharmacology and Neurotoxicology, Shanghai University, Shanghai, China
| | - Qiuhong Wang
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Harbin, China.,School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Zhi-Yong Tan
- Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States
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8
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Hooijmans CR, Draper D, Ergün M, Scheffer GJ. The effect of analgesics on stimulus evoked pain-like behaviour in animal models for chemotherapy induced peripheral neuropathy- a meta-analysis. Sci Rep 2019; 9:17549. [PMID: 31772391 PMCID: PMC6879539 DOI: 10.1038/s41598-019-54152-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 11/09/2019] [Indexed: 12/28/2022] Open
Abstract
Chemotherapy induced painful peripheral neuropathy (CIPN) is a common dose-limiting side effect of several chemotherapeutic agents. Despite large amounts of human and animal studies, there is no sufficiently effective pharmacological treatment for CIPN. Although reducing pain is often a focus of CIPN treatment, remarkably few analgesics have been tested for this indication in clinical trials. We conducted a systematic review and meta-analyses regarding the effects of analgesics on stimulus evoked pain-like behaviour during CIPN in animal models. This will form a scientific basis for the development of prospective human clinical trials. A comprehensive search identified forty-six studies. Risk of bias (RoB) analyses revealed that the design and conduct of the included experiments were poorly reported, and therefore RoB was unclear in most studies. Meta-analyses showed that administration of analgesics significantly increases pain threshold for mechanical (SMD: 1.68 [1.41; 1.82]) and cold (SMD: 1. 41 [0.99; 1.83]) evoked pain. Subgroup analyses revealed that dexmedetomidine, celecoxib, fentanyl, morphine, oxycodone and tramadol increased the pain threshold for mechanically evoked pain, and lidocaine and morphine for cold evoked pain. Altogether, this meta-analysis shows that there is ground to investigate the use of morphine in clinical trials. Lidocaine, dexmedetomidine, celecoxib, fentanyl, oxycodone and tramadol might be good alternatives, but more animal-based research is necessary.
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Affiliation(s)
- Carlijn R Hooijmans
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, The Netherlands. .,Department for Health Evidence unit SYRCLE, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - Derk Draper
- Department for Health Evidence unit SYRCLE, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Mehmet Ergün
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Gert Jan Scheffer
- Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
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9
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Shidahara Y, Natsume T, Awaga Y, Ogawa S, Yamoto K, Okamoto S, Hama A, Hayashi I, Takamatsu H, Magata Y. Distinguishing analgesic drugs from non-analgesic drugs based on brain activation in macaques with oxaliplatin-induced neuropathic pain. Neuropharmacology 2019; 149:204-211. [PMID: 30817933 DOI: 10.1016/j.neuropharm.2019.02.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 01/28/2019] [Accepted: 02/24/2019] [Indexed: 11/16/2022]
Abstract
The antineoplastic agent oxaliplatin is a first-line treatment for colorectal cancer. However, neuropathic pain, characterized by hypersensitivity to cold, emerges soon after treatment. In severe instances, dose reduction or curtailing treatment may be necessary. While a number of potential treatments for oxaliplatin-induced neuropathic pain have been proposed based on preclinical findings, few have demonstrated efficacy in randomized, placebo-controlled clinical studies. This failure could be related, in part, to the use of rodents as the primary preclinical species, as there are a number of distinctions in pain-related mechanisms between rodents and humans. Also, an indicator of preclinical pharmacological efficacy less subjective than behavioral endpoints that is translatable to clinical usage is lacking. Three days after oxaliplatin treatment in Macaca fascicularis, a significantly reduced response latency to cold (10 °C) water was observed, indicating cold hypersensitivity. Cold-evoked bilateral activation of the secondary somatosensory (SII) and insular (Ins) cortex was observed with functional magnetic resonance imaging. Duloxetine alleviated cold hypersensitivity and significantly attenuated activation in both SII and Ins. By contrast, neither clinically used analgesics pregabalin nor tramadol affected cold hypersensitivity and cold-evoked activation of SII and Ins. The current findings suggest that suppressing SII and Ins activation leads to antinociception, and, therefore, could be used as a non-behavioral indicator of analgesic efficacy in patients with oxaliplatin-induced neuropathic pain.
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Affiliation(s)
- Yuka Shidahara
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan
| | - Takahiro Natsume
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan
| | - Yūji Awaga
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan
| | - Shin'ya Ogawa
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan
| | - Kurumi Yamoto
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan
| | - Shinichi Okamoto
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan
| | - Aldric Hama
- Hamamatsu Pharma Research, Inc., Hamamatsu, Shizuoka Prefecture, Japan.
| | - Ikuo Hayashi
- Hamamatsu Pharma Research, USA, Inc., San Diego, CA, USA
| | | | - Yasuhiro Magata
- Department of Molecular Imaging, Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka Prefecture, Japan
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Chae HK, Kim W, Kim SK. Phytochemicals of Cinnamomi Cortex: Cinnamic Acid, but not Cinnamaldehyde, Attenuates Oxaliplatin-Induced Cold and Mechanical Hypersensitivity in Rats. Nutrients 2019; 11:nu11020432. [PMID: 30791474 PMCID: PMC6412559 DOI: 10.3390/nu11020432] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 01/08/2023] Open
Abstract
A chemotherapy drug, oxaliplatin, induces cold and mechanical hypersensitivity, but effective treatments for this neuropathic pain without side effects are still lacking. We previously showed that Cinnamomi Cortex suppresses oxaliplatin-induced pain behaviors in rats. However, it remains unknown which phytochemical of Cinnamomi Cortex plays a key role in that analgesic action. Thus, here we investigated whether and how cinnamic acid or cinnamaldehyde, major components of Cinnamomi Cortex, alleviates cold and mechanical allodynia induced by a single oxaliplatin injection (6 mg/kg, i.p.) in rats. Using an acetone test and the von Frey test for measuring cold and mechanical allodynia, respectively, we found that administration of cinnamic acid, but not cinnamaldehyde, at doses of 10, 20 and 40 mg/kg (i.p.) significantly attenuates the allodynic behaviors in oxaliplatin-injected rats with the strongest effect being observed at 20 mg/kg. Our in vivo extracellular recordings also showed that cinnamic acid (20 mg/kg, i.p.) inhibits the increased activities of spinal wide dynamic range neurons in response to cutaneous mechanical and cold stimuli following the oxaliplatin injection. These results indicate that cinnamic acid has an effective analgesic action against oxaliplatin-induced neuropathic pain through inhibiting spinal pain transmission, suggesting its crucial role in mediating the effect of Cinnamomi Cortex.
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Affiliation(s)
- Hyeon Kyeong Chae
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
| | - Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea.
| | - Sun Kwang Kim
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea.
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11
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Heuvel SASVD, Doorduin J, Steegers MAH, Bronkhorst EM, Radema SA, Vissers KCP, Wal SEIVD, Alfen NV. Simple surface EMG recording as a noninvasive screening method for the detection of acute oxaliplatin-induced neurotoxicity: a feasibility pilot study. Neurosci Lett 2019; 699:184-188. [PMID: 30753911 DOI: 10.1016/j.neulet.2019.02.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 01/30/2019] [Accepted: 02/08/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Oxaliplatin-induced neurotoxicity can be a dose-limiting side effect to effective chemotherapy. Acute hyperexcitability causes cold-evoked sensory and motor symptoms, which resemble neuromyotonia. An accessible and non-invasive technique for early detection could help select patients for potential treatments. We assessed the use of a simple surface electromyography (sEMG) in patients directly after oxaliplatin infusion. METHODS In patients with colorectal cancer, acute neurotoxicity was evaluated by means of a physical examination, a questionnaire, and sEMG directly after the second and fourth cycle of oxaliplatin. Questionnaires were also assessed 1 day after infusion. RESULTS 14 patients were measured after the second cycle and 8 patients were also measured after the fourth cycle of oxaliplatin. All patients reported to a variable degree oxaliplatin induced neurotoxicity symptoms: sensitivity to touching cold or swallowing cold items were reported as most severe. Clinical signs of hyperexcitability were observed in 55% of the measurements. Spontaneous activity compatible with neuromyotonia was observed in 82% of the sEMG recordings. CONCLUSIONS Patient reported symptoms, physical examination and simple sEMG are complementary measurements to detect acute oxaliplatin induced neurotoxicity. After further validation, sEMG recording can be used as a simple objective screenings tool to detect nerve hyperexcitability directly after oxaliplatin administration.
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Affiliation(s)
- Sandra A S van den Heuvel
- Expertise center for Pain and Palliative Medicine, Department of Anesthesiology and Pain Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jonne Doorduin
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Monique A H Steegers
- Expertise center for Pain and Palliative Medicine, Department of Anesthesiology and Pain Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ewald M Bronkhorst
- Department of Health Evidence, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Sandra A Radema
- Department of Medical Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Kris C P Vissers
- Expertise center for Pain and Palliative Medicine, Department of Anesthesiology and Pain Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Selina E I van der Wal
- Expertise center for Pain and Palliative Medicine, Department of Anesthesiology and Pain Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nens van Alfen
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
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12
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Han FY, Kuo A, Nicholson JR, Corradinni L, Smith MT. Comparative analgesic efficacy of pregabalin administered according to either a prevention protocol or an intervention protocol in rats with cisplatin‐induced peripheral neuropathy. Clin Exp Pharmacol Physiol 2018; 45:1067-1075. [DOI: 10.1111/1440-1681.12971] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/15/2018] [Accepted: 05/15/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Felicity Y Han
- School of Biomedical Sciences Faculty of Medicine The University of Queensland Brisbane Queensland Australia
| | - Andy Kuo
- School of Biomedical Sciences Faculty of Medicine The University of Queensland Brisbane Queensland Australia
| | | | | | - Maree T Smith
- School of Biomedical Sciences Faculty of Medicine The University of Queensland Brisbane Queensland Australia
- School of Pharmacy Faculty of Health and Behavioural Sciences The University of Queensland Brisbane Queensland Australia
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13
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Gaps in Understanding Mechanism and Lack of Treatments: Potential Use of a Nonhuman Primate Model of Oxaliplatin-Induced Neuropathic Pain. Pain Res Manag 2018; 2018:1630709. [PMID: 29854035 PMCID: PMC5954874 DOI: 10.1155/2018/1630709] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 04/03/2018] [Indexed: 12/11/2022]
Abstract
The antineoplastic agent oxaliplatin induces an acute hypersensitivity evoked by cold that has been suggested to be due to sensitized central and peripheral neurons. Rodent-based preclinical studies have suggested numerous treatments for the alleviation of oxaliplatin-induced neuropathic pain, but few have demonstrated robust clinical efficacy. One issue is that current understanding of the pathophysiology of oxaliplatin-induced neuropathic pain is primarily based on rodent models, which might not entirely recapitulate the clinical pathophysiology. In addition, there is currently no objective physiological marker for pain that could be utilized to objectively indicate treatment efficacy. Nonhuman primates are phylogenetically and neuroanatomically similar to humans; thus, disease mechanism in nonhuman primates could reflect that of clinical oxaliplatin-induced neuropathy. Cold-activated pain-related brain areas in oxaliplatin-treated macaques were attenuated with duloxetine, the only drug that has demonstrated clinical efficacy for chemotherapy-induced neuropathic pain. By contrast, drugs that have not demonstrated clinical efficacy in oxaliplatin-induced neuropathic pain did not reduce brain activation. Thus, a nonhuman primate model could greatly enhance understanding of clinical pathophysiology beyond what has been obtained with rodent models and, furthermore, brain activation could serve as an objective marker of pain and therapeutic efficacy.
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14
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Rapacz A, Obniska J, Koczurkiewicz P, Wójcik-Pszczoła K, Siwek A, Gryboś A, Rybka S, Karcz A, Pękala E, Filipek B. Antiallodynic and antihyperalgesic activity of new 3,3-diphenyl-propionamides with anticonvulsant activity in models of pain in mice. Eur J Pharmacol 2017; 821:39-48. [PMID: 29262297 DOI: 10.1016/j.ejphar.2017.12.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/15/2017] [Accepted: 12/15/2017] [Indexed: 01/06/2023]
Abstract
Anticonvulsant drugs are used to treat a wide range of non-epileptic conditions, including chronic pain. The aim of the present experiments was to examine analgesic activity of three new 3,3-diphenyl-propionamides, which had previously demonstrated anticonvulsant activity in the MES (maximal electroshock seizure), scPTZ (subcutaneous pentylenetetrazole) and/or 6Hz (psychomotor seizure) tests in mice. Antinociceptive activity was examined in mouse models of acute pain (the hot plate test) and tonic pain (the formalin test) in mice. Antiallodynic and antihyperalgesic activity was estimated in the oxaliplatin-induced neuropathic pain model of chemotherapy-induced peripheral neuropathy and in the streptozotocin-induced model of painful diabetic neuropathy in mice. Considering the drug safety evaluation, the influence on locomotor activity was checked. Moreover, using in vitro methods, selected compound was tested for potential hepatotoxicity on human hepatocellular carcinoma cell line and for metabolic stability. To determine the plausible mechanism of anticonvulsant and antinociceptive action, in vitro binding and functional assays were carried out. Among tested molecules two of them JOA 122 (3p) and JOA 123 (3q) revealed significant antinociceptive activity in the model of tonic pain - the formalin test and neuropathic pain models - the oxaliplatin and streptozotocin-induced peripheral neuropathy. In the binding studies JOA 122 (3p) revealed the high affinity to voltage-gated sodium channels (Nav1.2), as well as for 5-HT1A receptors. Metabolism studies in mouse liver microsomes showed a low metabolic stability of this compound.
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Affiliation(s)
- Anna Rapacz
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland.
| | - Jolanta Obniska
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Paulina Koczurkiewicz
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Katarzyna Wójcik-Pszczoła
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Agata Siwek
- Department of Pharmacobiology, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Anna Gryboś
- Department of Pharmacobiology, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Sabina Rybka
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Aleksandra Karcz
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Elżbieta Pękala
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
| | - Barbara Filipek
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Krakow, Poland
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15
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Kim W, Chung Y, Choi S, Min BI, Kim SK. Duloxetine Protects against Oxaliplatin-Induced Neuropathic Pain and Spinal Neuron Hyperexcitability in Rodents. Int J Mol Sci 2017; 18:ijms18122626. [PMID: 29206213 PMCID: PMC5751229 DOI: 10.3390/ijms18122626] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/28/2017] [Accepted: 11/30/2017] [Indexed: 12/20/2022] Open
Abstract
Oxaliplatin is a widely used chemotherapy agent, but induces serious peripheral neuropathy. Duloxetine is a dual reuptake inhibitor of serotonin and norepinephrine, and is shown to be effective against pain. However, whether and how duloxetine can attenuate oxaliplatin-induced allodynia in rodents is not clearly understood. A single injection of oxaliplatin (6 mg/kg, intraperitoneal; i.p.) induced a cold and mechanical allodynia, which was assessed by acetone and von Frey filament tests, respectively. When significant allodynic signs were observed, three different doses of duloxetine (10, 30, and 60 mg/kg, i.p.) were injected. Administration of 30 and 60 mg/kg of duloxetine significantly reduced the allodynia, whereas 10 mg/kg did not. By using an in vivo extracellular recording method, we further confirmed that 30 mg/kg of duloxetine could significantly inhibit the hyperexcitability of spinal wide dynamic range (WDR) cells. The anti-allodynic effect of duloxetine was completely blocked by an intrathecal injection of phentolamine (non-selective α-adrenergic receptor antagonist, 20 μg), or prazosin (α1-adrenergic receptor antagonists, 10 μg); however, idazoxan (α2-adrenergic receptor antagonist, 10 μg) did not block it. In conclusion, we suggest that duloxetine may have an effective protective action against oxaliplatin-induced neuropathic pain and spinal hyperexcitability, which is mediated by spinal α1-adrenergic receptors.
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Affiliation(s)
- Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
| | - Yeongu Chung
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
- Department of Neurosurgery, College of Medicine, Kyung Hee University, Kyung Hee University Hospital, Seoul 02447, Korea.
| | - Seunghwan Choi
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
| | - Byung-Il Min
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
- Yeongju Municipal Hospital, Yeongju-si 36051, Korea.
| | - Sun Kwang Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.
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16
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Choi J, Jeon C, Lee JH, Jang JU, Quan FS, Lee K, Kim W, Kim SK. Suppressive Effects of Bee Venom Acupuncture on Paclitaxel-Induced Neuropathic Pain in Rats: Mediation by Spinal α₂-Adrenergic Receptor. Toxins (Basel) 2017; 9:toxins9110351. [PMID: 29088102 PMCID: PMC5705966 DOI: 10.3390/toxins9110351] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 10/24/2017] [Accepted: 10/24/2017] [Indexed: 11/16/2022] Open
Abstract
Paclitaxel, a chemotherapy drug for solid tumors, induces peripheral painful neuropathy. Bee venom acupuncture (BVA) has been reported to have potent analgesic effects, which are known to be mediated by activation of spinal α-adrenergic receptor. Here, we investigated the effect of BVA on mechanical hyperalgesia and spinal neuronal hyperexcitation induced by paclitaxel. The role of spinal α-adrenergic receptor subtypes in the analgesic effect of BVA was also observed. Administration of paclitaxel (total 8 mg/kg, intraperitoneal) on four alternate days (days 0, 2, 4, and 6) induced significant mechanical hyperalgesic signs, measured using a von Frey filament. BVA (1 mg/kg, ST36) relieved this mechanical hyperalgesia for at least two hours, and suppressed the hyperexcitation in spinal wide dynamic range neurons evoked by press or pinch stimulation. Both melittin (0.5 mg/kg, ST36) and phospholipase A2 (0.12 mg/kg, ST36) were shown to play an important part in this analgesic effect of the BVA, as they significantly attenuated the pain. Intrathecal pretreatment with the α₂-adrenergic receptor antagonist (idazoxan, 50 µg), but not α₁-adrenergic receptor antagonist (prazosin, 30 µg), blocked the analgesic effect of BVA. These results suggest that BVA has potent suppressive effects against paclitaxel-induced neuropathic pain, which were mediated by spinal α₂-adrenergic receptor.
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Affiliation(s)
- Jiho Choi
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Changhoon Jeon
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Ji Hwan Lee
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Jo Ung Jang
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Fu Shi Quan
- Department of Medical Zoology, School of Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Kyungjin Lee
- Department of Herbology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Sun Kwang Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
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17
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Di Cesare Mannelli L, Maresca M, Micheli L, Farina C, Scherz MW, Ghelardini C. A rat model of FOLFOX-induced neuropathy: effects of oral dimiracetam in comparison with duloxetine and pregabalin. Cancer Chemother Pharmacol 2017; 80:1091-1103. [PMID: 29026967 DOI: 10.1007/s00280-017-3449-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/06/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM The FOLFOX family of chemotherapy regimens are hampered by the development of a painful neuropathy. Current clinical treatments are inadequate, and furthermore, the research of innovative drugs is strongly disadvantaged by the absence of a preclinical model based on the complete mixture of FOLFOX components. The aim of this study was to set up a rat model of FOLFOX-induced neuropathy in rats, validate its predictability by reference drugs, and evaluate the effectiveness of the new anti-neuropathic compound dimiracetam. METHODS Male Sprague-Dawley rats were treated intraperitoneally with the FOLFOX components (6 mg kg-1 oxaliplatin, 50 mg kg-1 5-FU, 90 mg kg-1 leucovorin calcium salt) or oxaliplatin alone (6 mg kg-1) on days 0, 7, 14, and 21, whereas a separate group received one more injection of FOLFOX on day 28. Pain behavioural measurements (paw pressure, cold plate, and electronic Von Frey tests) and motor coordination (Rota-rod test) were assessed before and after treatments. Behavioural, motor, neurological, and autonomic parameters (open field and Irwin tests) were evaluated. RESULTS FOLFOX reduced the pain threshold in response to mechanical noxious and thermal (cold) non-noxious stimuli beginning from day 14 up to day 42 comparably to oxaliplatin alone. A fifth FOLFOX injection enhanced the severity but not the duration of painful alterations. Spontaneous activity, behavioural, autonomic, and neurological functions were also affected, whereas the motor coordination was not altered. On day 22, duloxetine (15 mg kg-1, per os), morphine (10 mg kg-1, subcutaneously), or pregabalin (20 mg kg-1, per os), acutely administered, reduced the FOLFOX-dependent hypersensitivity. Repeated treatments with dimiracetam (150 mg kg-1, per os, twice daily, from day 22) significantly protected rats from FOLFOX-induced alterations of pain threshold as well as from autonomic and neurological impairments taking effect after 7 days treatment. Pregabalin repeatedly administered (20 mg kg-1, per os, twice daily, from day 22) was less effective in reducing mechanical hypersensitivity. CONCLUSION A clinically consistent model of FOLFOX-induced neurotoxicity has been developed in rats. Dimiracetam fully reduced hypersensitivity and neurological alterations showing a relevant profile as anti-neuropathic resource.
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Affiliation(s)
- Lorenzo Di Cesare Mannelli
- Department of Neuroscience, Psychology, Drug Research and Child Health, Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139, Firenze, Italy.
| | - Mario Maresca
- Department of Neuroscience, Psychology, Drug Research and Child Health, Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139, Firenze, Italy
| | - Laura Micheli
- Department of Neuroscience, Psychology, Drug Research and Child Health, Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139, Firenze, Italy
| | - Carlo Farina
- Metys Pharmaceuticals AG, Leimenstrasse 57, 4055, Basel, Switzerland
| | - Michael W Scherz
- Metys Pharmaceuticals AG, Leimenstrasse 57, 4055, Basel, Switzerland
| | - Carla Ghelardini
- Department of Neuroscience, Psychology, Drug Research and Child Health, Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139, Firenze, Italy
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18
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Chaumette T, Chapuy E, Berrocoso E, Llorca-Torralba M, Bravo L, Mico JA, Chalus M, Eschalier A, Ardid D, Marchand F, Sors A. Effects of S 38093, an antagonist/inverse agonist of histamine H3 receptors, in models of neuropathic pain in rats. Eur J Pain 2017; 22:127-141. [PMID: 28877402 DOI: 10.1002/ejp.1097] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2017] [Indexed: 11/08/2022]
Abstract
BACKGROUND Histamine H3 receptors are mainly expressed on CNS neurons, particularly along the nociceptive pathways. The potential involvement of these receptors in pain processing has been suggested using H3 receptor inverse agonists. METHODS The antinociceptive effect of S 38093, a novel inverse agonist of H3 receptors, has been evaluated in several neuropathic pain models in rat and compared with those of gabapentin and pregabalin. RESULTS While S 38093 did not change vocalization thresholds to paw pressure in healthy rats, it exhibited a significant antihyperalgesic effect in the Streptozocin-induced diabetic (STZ) neuropathy model after acute and chronic administration and, in the chronic constriction injury (CCI) model only after chronic administration, submitted to the paw-pressure test. Acute S 38093 administration at all doses tested displayed a significant cold antiallodynic effect in a model of acute or repeated administration of oxaliplatin-induced neuropathy submitted to cold tail immersion, cold allodynia being the main side effect of oxaliplatin in patients. The effect of S 38093 increased following chronic administration (i.e. twice a day during 5 days) in the CCI and STZ models except in the oxaliplatin models where its effect was already maximal from the first administration The kinetics and size of effect of S 38093 were similar to gabapentin and/or pregabalin. Finally, the antinociceptive effect of S 38093 could be partially mediated by α2 adrenoreceptors desensitization in the locus coeruleus. CONCLUSIONS These results highlight the interest of S 38093 to relieve neuropathic pain and warrant clinical trials especially in chemotherapeutic agent-induced neuropathic pain. SIGNIFICANCE S 38093, a new H3 antagonist/inverse agonist, displays antiallodynic and antihyperalgesic effect in neuropathic pain, especially in oxaliplatin-induced neuropathy after chronic administration. This effect of S 38093 in neuropathic pain could be partly mediated by α2 receptors desensitization in the locus coeruleus.
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Affiliation(s)
- T Chaumette
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - E Chapuy
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - E Berrocoso
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
| | - M Llorca-Torralba
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - L Bravo
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - J A Mico
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - M Chalus
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - A Eschalier
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - D Ardid
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - F Marchand
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - A Sors
- Institut de Recherches Internationales Servier (I.R.I.S.), Suresnes Cedex, France
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19
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Seto Y, Takase M, Tsuji Y, To H. Pregabalin reduces cisplatin-induced mechanical allodynia in rats. J Pharmacol Sci 2017; 134:175-180. [DOI: 10.1016/j.jphs.2017.06.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 05/15/2017] [Accepted: 06/06/2017] [Indexed: 11/26/2022] Open
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20
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Rapacz A, Kamiński K, Obniska J, Koczurkiewicz P, Pękala E, Filipek B. Analgesic, antiallodynic, and anticonvulsant activity of novel hybrid molecules derived from N-benzyl-2-(2,5-dioxopyrrolidin-1-yl)propanamide and 2-(2,5-dioxopyrrolidin-1-yl)butanamide in animal models of pain and epilepsy. Naunyn Schmiedebergs Arch Pharmacol 2017; 390:567-579. [PMID: 28188357 PMCID: PMC5411412 DOI: 10.1007/s00210-017-1358-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 02/01/2017] [Indexed: 01/25/2023]
Abstract
The purpose of the present study was to examine the analgesic activity of six novel hybrid molecules, which demonstrated in the previous research anticonvulsant activity in the maximal electroshock seizure (MES) and subcutaneous pentylenetetrazole seizure (scPTZ) tests in mice. The antinociceptive properties were estimated in three models of pain in mice—the hot plate test, the formalin test, and in the oxaliplatin-induced neuropathy. Moreover, extended anticonvulsant studies were carried out and the antiseizure activity was investigated in the 6-Hz test. Considering drug safety evaluation, the influence of compounds on locomotor activity and contextual memory were checked. Furthermore, chosen molecules were tested in vitro for potential hepatotoxicity. To explain the probable mechanism of action, the radioligand binding assays were performed. In both phases of formalin test, analgesic activity demonstrated compounds 4, 8, and 9. These agents relieved also mechanical allodynia in oxaliplatin-induced model of neuropathic pain. At active doses, they did not influence locomotor activity of mice. Moreover, for compounds 8 and 9, no deleterious effect on memory was observed, but compound 4 might induce memory deficits. All tested compounds (4, 5, 8, 9, 15, and 16) inhibited psychomotor seizures with the ED50 values = 24.66–47.21 mg/kg. The binding studies showed that compound 4 only at the high concentrations revealed the effective binding to the neuronal sodium channels and moderately binding to the L-type calcium (verapamil site) channels and NMDA receptors. The present preclinical results proved that novel hybrid molecules demonstrate very promising anticonvulsant and analgesic activity.
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Affiliation(s)
- Anna Rapacz
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Krakow, Poland.
| | - Krzysztof Kamiński
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Krakow, Poland
| | - Jolanta Obniska
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Krakow, Poland
| | - Paulina Koczurkiewicz
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Krakow, Poland
| | - Elżbieta Pękala
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Krakow, Poland
| | - Barbara Filipek
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Krakow, Poland
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21
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Sarıtaş TB, Korkmaz M, Sevimli A, Sarıtaş ZK. Comparison of the effects of gabapentin and pregabalin on wound healing in rats. Int Wound J 2016; 13:748-53. [PMID: 25348659 PMCID: PMC7949902 DOI: 10.1111/iwj.12364] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/04/2014] [Accepted: 08/06/2014] [Indexed: 11/26/2022] Open
Abstract
Gabapentinoids are effective adjunct drugs for reducing postoperative pain. However, the effects of gabapentinoids on wound healing have not been evaluated yet. In this study we evaluated their effects on wound healing. A total of 17 male Wistar-Albino rats, 250-350 g, were divided into three groups randomly: control group (n = 5, 2 ml saline), gabapentin group (n = 6, 20 mg/kg gabapentin) and pregabalin group (n = 6, 20 mg/kg pregabalin). Until day 13 inflammation scores were significantly lower (P < 0·05) and wound healing was significantly better in the control group when compared with gabapentin and pregabalin groups (P < 0·001). Inflammation scores were significantly lower in pregabalin group when compared with gabapentin group until day 13. But wound healing was significantly better in gabapentin group than in pregabalin group between days 13 and 21. In conclusion when gabapentin and pregabalin were compared, although pregabalin decreases inflammation scores, gabapentin has better results in wound healing.
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Affiliation(s)
- Tuba Berra Sarıtaş
- Department of Anesthesiology and Reanimation, Meram Medical School, Necmettin Erbakan University, Konya, Turkey.
| | - Musa Korkmaz
- Department of Surgery, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Alper Sevimli
- Department of Pathology, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Zulfikar Kadir Sarıtaş
- Department of Surgery, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
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22
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Kim C, Lee JH, Kim W, Li D, Kim Y, Lee K, Kim SK. The Suppressive Effects of Cinnamomi Cortex and Its Phytocompound Coumarin on Oxaliplatin-Induced Neuropathic Cold Allodynia in Rats. Molecules 2016; 21:E1253. [PMID: 27657030 PMCID: PMC6274362 DOI: 10.3390/molecules21091253] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/10/2016] [Accepted: 09/12/2016] [Indexed: 12/13/2022] Open
Abstract
Oxaliplatin, a chemotherapy drug, induces acute peripheral neuropathy characterized by cold allodynia, spinal glial activation and increased levels of pro-inflammatory cytokines. Herein, we determined whether Cinnamomi Cortex (C. Cortex), a widely used medicinal herb in East Asia for cold-related diseases, could attenuate oxaliplatin-induced cold allodynia in rats and the mechanisms involved. A single oxaliplatin injection (6 mg/kg, i.p.) induced significant cold allodynia signs based on tail immersion tests using cold water (4 °C). Daily oral administration of water extract of C. Cortex (WECC) (100, 200, and 400 mg/kg) for five consecutive days following an oxaliplatin injection dose-dependently alleviated cold allodynia with only a slight difference in efficacies between the middle dose at 200 mg/kg and the highest dose at 400 mg/kg. WECC at 200 mg/kg significantly suppressed the activation of astrocytes and microglia and decreased the expression levels of IL-1β and TNF in the spinal cord after injection with oxaliplatin. Furthermore, oral administration of coumarin (10 mg/kg), a major phytocompound of C. Cortex, markedly reduced cold allodynia. These results indicate that C. Cortex has a potent anti-allodynic effect in oxaliplatin-injected rats through inhibiting spinal glial cells and pro-inflammatory cytokines. We also suggest that coumarin might play a role in the anti-allodynic effect of C. Cortex.
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Affiliation(s)
- Changmin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
| | - Ji Hwan Lee
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
| | - Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
| | - Dongxing Li
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 573 Xujiahui Rd., Dapiqiao, Huangpu Qu, Shanghai 200025, China.
| | - Yangseok Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
| | - Kyungjin Lee
- Department of Herbology, College of Korean Medicine, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
| | - Sun Kwang Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, 26 Kyunghee-daero, Dongdamoon-gu, Seoul 02447, Korea.
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Lee JH, Go D, Kim W, Lee G, Bae H, Quan FS, Kim SK. Involvement of spinal muscarinic and serotonergic receptors in the anti-allodynic effect of electroacupuncture in rats with oxaliplatin-induced neuropathic pain. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2016; 20:407-14. [PMID: 27382357 PMCID: PMC4930909 DOI: 10.4196/kjpp.2016.20.4.407] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/15/2016] [Accepted: 06/01/2016] [Indexed: 01/28/2023]
Abstract
This study was performed to investigate whether the spinal cholinergic and serotonergic analgesic systems mediate the relieving effect of electroacupuncture (EA) on oxaliplatin-induced neuropathic cold allodynia in rats. The cold allodynia induced by an oxaliplatin injection (6 mg/kg, i.p.) was evaluated by immersing the rat's tail into cold water (4℃) and measuring the withdrawal latency. EA stimulation (2 Hz, 0.3-ms pulse duration, 0.2~0.3 mA) at the acupoint ST36, GV3, or LI11 all showed a significant anti-allodynic effect, which was stronger at ST36. The analgesic effect of EA at ST36 was blocked by intraperitoneal injection of muscarinic acetylcholine receptor antagonist (atropine, 1 mg/kg), but not by nicotinic (mecamylamine, 2 mg/kg) receptor antagonist. Furthermore, intrathecal administration of M2 (methoctramine, 10 µg) and M3 (4-DAMP, 10 µg) receptor antagonist, but not M1 (pirenzepine, 10 µg) receptor antagonist, blocked the effect. Also, spinal administration of 5-HT3 (MDL-72222, 12 µg) receptor antagonist, but not 5-HT1A (NAN-190, 15 µg) or 5-HT2A (ketanserin, 30 µg) receptor antagonist, prevented the anti-allodynic effect of EA. These results suggest that EA may have a signifi cant analgesic action against oxaliplatin-induced neuropathic pain, which is mediated by spinal cholinergic (M2, M3) and serotonergic (5-HT3) receptors.
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Affiliation(s)
- Ji Hwan Lee
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Donghyun Go
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Woojin Kim
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.; Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Giseog Lee
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.; Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Hyojeong Bae
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Fu Shi Quan
- Department of Medical Zoology, School of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Sun Kwang Kim
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.; Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea.; Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Korea
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Hopkins HL, Duggett NA, Flatters SJ. Chemotherapy-induced painful neuropathy: pain-like behaviours in rodent models and their response to commonly used analgesics. Curr Opin Support Palliat Care 2016; 10:119-128. [PMID: 27054288 PMCID: PMC4982532 DOI: 10.1097/spc.0000000000000204] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
PURPOSE OF REVIEW Chemotherapy-induced painful neuropathy (CIPN) is a major dose-limiting side-effect of several widely used chemotherapeutics. Rodent models of CIPN have been developed using a range of dosing regimens to reproduce pain-like behaviours akin to patient-reported symptoms. This review aims to connect recent evidence-based suggestions for clinical treatment to preclinical data. RECENT FINDINGS We will discuss CIPN models evoked by systemic administration of taxanes (paclitaxel and docetaxel), platinum-based agents (oxaliplatin and cisplatin), and the proteasome-inhibitor - bortezomib. We present an overview of dosing regimens to produce CIPN models and their phenotype of pain-like behaviours. In addition, we will discuss how potential, clinically available treatments affect pain-like behaviours in these rodent models, relating those effects to clinical trial data wherever possible. We have focussed on antidepressants, opioids, and gabapentinoids given their broad usage. SUMMARY The review outlines the latest description of the most-relevant rodent models of CIPN enabling comparison between chemotherapeutics, dosing regimen, rodent strain, and sex. Preclinical data support many of the recent suggestions for clinical management of established CIPN and provides evidence for potential treatments warranting clinical investigation. Continued research using rodent CIPN models will provide much needed understanding of the causal mechanisms of CIPN, leading to new treatments for this major clinical problem.
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Affiliation(s)
- Holly L. Hopkins
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, UK
| | - Natalie A. Duggett
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, UK
| | - Sarah J.L. Flatters
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE1 1UL, UK
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Rapacz A, Obniska J, Wiklik-Poudel B, Rybka S, Sałat K, Filipek B. Anticonvulsant and antinociceptive activity of new amides derived from 3-phenyl-2,5-dioxo-pyrrolidine-1-yl-acetic acid in mice. Eur J Pharmacol 2016; 781:239-49. [PMID: 27089821 DOI: 10.1016/j.ejphar.2016.04.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 04/01/2016] [Accepted: 04/14/2016] [Indexed: 12/27/2022]
Abstract
The aim of the present experiments was to examine the anticonvulsant and antinociceptive activity of five new amides derived from 3-phenyl-2,5-dioxo-pyrrolidine-1-yl-acetic acid in animal models of seizures and pain. The antiseizure activity was investigated in three acute models of seizures, namely, the maximal electroshock (MES), the subcutaneous pentylenetetrazole (scPTZ), and 6Hz psychomotor seizure tests in mice. The antinociceptive properties were estimated in the formalin model of tonic pain, and in the oxaliplatin-induced neuropathic pain model in mice. Considering drug safety evaluation, acute neurological toxicity was determined in the rotarod test. Three tested compounds (3, 4, and 7) displayed a broad spectrum of anticonvulsant activity and showed better protective indices than those obtained for MES/scPTZ/6Hz active reference drug - valproic acid. Furthermore, three compounds (3, 4, and 6) demonstrated a significant antinociceptive effect in the formalin test, as well as antiallodynic activity in the oxaliplatin-induced neuropathic pain model. Among the tested agents, compounds 3 and 4 displayed not only antiseizure properties, but also collateral prominent analgesic properties. The in vitro binding study indicated that the plausible mechanism of action of chosen compound (4) was the influence on neuronal voltage-sensitive sodium (site 2) and L-type calcium channels.
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Affiliation(s)
- Anna Rapacz
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland.
| | - Jolanta Obniska
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Beata Wiklik-Poudel
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Sabina Rybka
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Kinga Sałat
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Barbara Filipek
- Department of Pharmacodynamics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
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Yamamoto S, Ono H, Kume K, Ohsawa M. Oxaliplatin treatment changes the function of sensory nerves in rats. J Pharmacol Sci 2016; 130:189-93. [DOI: 10.1016/j.jphs.2015.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 12/03/2015] [Indexed: 11/26/2022] Open
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Shidahara Y, Ogawa S, Nakamura M, Nemoto S, Awaga Y, Takashima M, Hama A, Matsuda A, Takamatsu H. Pharmacological comparison of a nonhuman primate and a rat model of oxaliplatin-induced neuropathic cold hypersensitivity. Pharmacol Res Perspect 2016; 4:e00216. [PMID: 26977304 PMCID: PMC4777264 DOI: 10.1002/prp2.216] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 12/18/2015] [Accepted: 01/09/2016] [Indexed: 12/17/2022] Open
Abstract
Oxaliplatin is a first‐line treatment for colorectal cancer. However, shortly following treatment, cold‐evoked hypersensitivity appears in the extremities and over time, the pain is such that oxaliplatin dosing may need to be markedly reduced or even terminated. There is currently a lack of efficacious treatments for oxaliplatin‐induced peripheral neuropathy, which is due in part to the difficulty in translating findings obtained from preclinical rodent models of chemotherapy‐induced peripheral neuropathy. Nonhuman primates (NHP) are phylogenetically closer to humans than rodents and may show drug responses that parallel those of humans. A significant decrease in tail withdrawal latency to 10°C water (“cold hypersensitivity”) was observed beginning 3 days after intravenous infusion of oxaliplatin (5 mg/kg) in Macaca fascicularis. A single treatment of duloxetine (30 mg/kg, p.o.) ameliorated oxaliplatin‐induced cold hypersensitivity, whereas pregabalin (30 mg/kg, p.o.) and tramadol (30 mg/kg, p.o.) did not. By contrast, in rats, no significant cold hypersensitivity, or increased responsiveness to acetone applied to the hind paws, was observed 3 days after the first injection of oxaliplatin (5 mg/kg, i.p., once per day, two injections). Therefore, rats were tested after six treatments of oxaliplatin, 17 days after the first treatment. All analgesics (30 mg/kg, p.o.) significantly ameliorated cold hypersensitivity in rats. The activity of analgesics in the oxaliplatin‐treated macaques parallel clinical findings. The current results indicate that the NHP could serve as a bridge species to improve translatability of preclinical findings into clinically useful treatments for oxaliplatin‐induced peripheral neuropathy.
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Affiliation(s)
- Yuka Shidahara
- Hamamatsu Pharma Research, Inc. Hamamatsu Shizuoka Japan
| | - Shinya Ogawa
- Hamamatsu Pharma Research, Inc. Hamamatsu Shizuoka Japan
| | - Mari Nakamura
- Hamamatsu Pharma Research, Inc. Hamamatsu Shizuoka Japan
| | - Shingo Nemoto
- Hamamatsu Pharma Research, Inc. Hamamatsu Shizuoka Japan
| | - Yuji Awaga
- Hamamatsu Pharma Research, Inc. Hamamatsu Shizuoka Japan
| | | | - Aldric Hama
- Hamamatsu Pharma Research, Inc. Hamamatsu Shizuoka Japan
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Yamamoto K, Tsuboi M, Kambe T, Abe K, Nakatani Y, Kawakami K, Utsunomiya I, Taguchi K. Oxaliplatin administration increases expression of the voltage-dependent calcium channel α2δ-1 subunit in the rat spinal cord. J Pharmacol Sci 2016; 130:117-22. [PMID: 26883453 DOI: 10.1016/j.jphs.2016.01.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 01/11/2016] [Accepted: 01/20/2016] [Indexed: 11/18/2022] Open
Abstract
Oxaliplatin is a chemotherapeutic agent that is effective against various types of cancer including colorectal cancer. Acute cold hyperalgesia is a serious side effect of oxaliplatin treatment. Although the therapeutic drug pregabalin is beneficial for preventing peripheral neuropathic pain by targeting the voltage-dependent calcium channel α2δ-1 (Cavα2δ-1) subunit, the effect of oxaliplatin-induced acute cold hypersensitivity is uncertain. To analyze the contribution of the Cavα2δ-1 subunit to the development of oxaliplatin-induced acute cold hypersensitivity, Cavα2δ-1 subunit expression in the rat spinal cord was analyzed after oxaliplatin treatment. Behavioral assessment using the acetone spray test showed that 6 mg/kg oxaliplatin-induced cold hypersensitivity 2 and 4 days later. Oxaliplatin-induced acute cold hypersensitivity 4 days after treatment was significantly inhibited by pregabalin (50 mg/kg, p.o.). Oxaliplatin (6 mg/kg, i.p.) treatment increased the expression level of Cavα2δ-1 subunit mRNA and protein in the spinal cord 2 and 4 days after treatment. Immunohistochemistry showed that oxaliplatin increased Cavα2δ-1 subunit protein expression in superficial layers of the spinal dorsal horn 2 and 4 days after treatment. These results suggest that oxaliplatin treatment increases Cavα2δ-1 subunit expression in the superficial layers of the spinal cord and may contribute to functional peripheral acute cold hypersensitivity.
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Affiliation(s)
- Ken Yamamoto
- Department of Education and Research Center for Clinical Pharmacy, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Mayuko Tsuboi
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Toshie Kambe
- Department of Pharmacology, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Kenji Abe
- Department of Pharmacology, School of Pharmaceutical Sciences, Ohu University, 31-1 Tomitamachi, Koriyama, Fukushima 963-8611, Japan
| | - Yoshihiko Nakatani
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Kazuyoshi Kawakami
- Department of Pharmacy, Cancer Institute Hospital, 3-10-6 Ariake, Koto-Ku, Tokyo 135-8550, Japan
| | - Iku Utsunomiya
- Department of Developmental Education, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Kyoji Taguchi
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan.
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Kim W, Kim MJ, Go D, Min BI, Na HS, Kim SK. Combined Effects of Bee Venom Acupuncture and Morphine on Oxaliplatin-Induced Neuropathic Pain in Mice. Toxins (Basel) 2016; 8:33. [PMID: 26805884 PMCID: PMC4773786 DOI: 10.3390/toxins8020033] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/14/2016] [Accepted: 01/18/2016] [Indexed: 12/24/2022] Open
Abstract
Oxaliplatin, a chemotherapeutic drug for colorectal cancer, induces severe peripheral neuropathy. Bee venom acupuncture (BVA) has been used to attenuate pain, and its effect is known to be mediated by spinal noradrenergic and serotonergic receptors. Morphine is a well-known opioid used to treat different types of pain. Here, we investigated whether treatment with a combination of these two agents has an additive effect on oxaliplatin-induced neuropathic pain in mice. To assess cold and mechanical allodynia, acetone and von Frey filament tests were used, respectively. Significant allodynia signs were observed three days after an oxaliplatin injection (6 mg/kg, i.p.). BVA (0.25, 1, and 2.5 mg/kg, s.c., ST36) or morphine (0.5, 2, and 5 mg/kg, i.p.) alone showed dose-dependent anti-allodynic effects. The combination of BVA and morphine at intermediate doses showed a greater and longer effect than either BVA or morphine alone at the highest dose. Intrathecal pretreatment with the opioidergic (naloxone, 20 μg) or 5-HT3 (MDL-72222, 15 μg) receptor antagonist, but not with α2 adrenergic (idazoxan, 10 μg) receptor antagonist, blocked this additive effect. Therefore, we suggest that the combination effect of BVA and morphine is mediated by spinal opioidergic and 5-HT3 receptors and this combination has a robust and enduring analgesic action against oxaliplatin-induced neuropathic pain.
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Affiliation(s)
- Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Min Joon Kim
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Donghyun Go
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
| | - Byung-Il Min
- Yeongju Municipal Hospital, 697 Jangan-ro, Anjeong-myeon, Gyeongsangbuk-do, Yeongju-si 36051, Korea.
| | - Heung Sik Na
- Department of Physiology, College of Medicine, Korea University, Anam-dong 5-ga, Seongbuk-gu, Seoul 02842, Korea.
| | - Sun Kwang Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 02447, Korea.
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Yamamoto K, Chiba N, Chiba T, Kambe T, Abe K, Kawakami K, Utsunomiya I, Taguchi K. Transient receptor potential ankyrin 1 that is induced in dorsal root ganglion neurons contributes to acute cold hypersensitivity after oxaliplatin administration. Mol Pain 2015; 11:69. [PMID: 26567040 PMCID: PMC4644342 DOI: 10.1186/s12990-015-0072-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 10/27/2015] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Peripheral cold neuropathic pain is a serious side effect of oxaliplatin treatment. However, the mechanism of oxaliplatin-induced cold hyperalgesia is unknown. In the present study, we investigated the effects of oxaliplatin on transient receptor potential ankyrin 1 (TRPA1) in dorsal root ganglion (DRG) neurons of rats. RESULTS Behavioral assessment using the acetone spray test showed that 3 and 6 mg/kg oxaliplatin (i.p.) induced acute cold hypersensitivity after 1, 2, 4, and 7 days. Real-time PCR showed that oxaliplatin (6 mg/kg) significantly increased TRPA1 mRNA expression in DRGs at days 1, 2, and 4. Western blotting revealed that oxaliplatin significantly increased TRPA1 protein expression in DRGs at days 2, 4, and 7. Moreover, in situ hybridization histochemistry revealed that most TRPA1 mRNA-labeled neurons in the DRGs were small in size. Oxaliplatin significantly increased co-localization of TRPA1 expression and isolectin B4 binding in DRG neurons. Oxaliplatin induced a significant increase in the percent of TRPA1 mRNA-positive small neurons in DRGs at days 1, 2, and 4. In addition, we found that intrathecal administration of TRPA1 antisense, but not TRPA1 mismatched oligodeoxynucleotides, knocked down TRPA1 expression and decreased oxaliplatin-induced cold hyperalgesia. Double labeling showed that p-p38 mitogen-activated protein kinase (MAPK) was co-expressed in TRPA1 mRNA-labeled neurons at day 2 after oxaliplatin administration. Intrathecal administration of the p38 MAPK inhibitor, SB203580, significantly decreased oxaliplatin-induced acute cold hypersensitivity. CONCLUSIONS Together, these results demonstrate that TRPA1 expression via activation of p38 MAPK in DRG neurons, at least in part, contributes to the development of oxaliplatin-induced acute cold hyperalgesia.
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Affiliation(s)
- Ken Yamamoto
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan.
| | - Noriko Chiba
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan.
| | - Terumasa Chiba
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan.
| | - Toshie Kambe
- Department of Pharmacology, Showa Pharmaceutical University, 3-3165, Machida, Tokyo, 194-8543, Japan.
| | - Kenji Abe
- Department of Pharmacology, School of Pharmaceutical Sciences, Ohu University, 31-1 Tomitamachi, Koriyama, Fukushima, 963-8611, Japan.
| | - Kazuyoshi Kawakami
- Department of Pharmacy, Cancer Institute Hospital, 3-10-6 Ariake, Koto-ku, Tokyo, 135-8550, Japan.
| | - Iku Utsunomiya
- Department of Pharmacotheraputics, Showa Pharmaceutical University, 3-3165, Machida, Tokyo, 194-8543, Japan.
| | - Kyoji Taguchi
- Department of Medicinal Pharmacology, Showa Pharmaceutical University, 3-3165 Higashitamagawagakuen, Machida, Tokyo, 194-8543, Japan.
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Micheli L, Di Cesare Mannelli L, Rizzi A, Guerrini R, Trapella C, Calò G, Ghelardini C. Intrathecal administration of nociceptin/orphanin FQ receptor agonists in rats: A strategy to relieve chemotherapy-induced neuropathic hypersensitivity. Eur J Pharmacol 2015; 766:155-62. [PMID: 26450087 DOI: 10.1016/j.ejphar.2015.10.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 09/15/2015] [Accepted: 10/02/2015] [Indexed: 12/14/2022]
Abstract
Oxaliplatin and paclitaxel are considered central components in the treatment of colorectal and breast cancer, respectively. The development of neuropathy during chronic treatment represents the major dose-limiting side effect that leads to discontinuation or interruption of therapies. The management of neuropathy is a challenge to individuate innovative therapeutic strategies based on new targets and correct routes of administration. We evaluated the hypersensitivity reliever effect of different opioid receptor agonists in rat models of oxaliplatin and paclitaxel-induced neuropathy. Compounds were spinally infused by intrathecal catheter. In oxaliplatin-treated rats, 0.3 nmol morphine induced the reversion of the mechanical hypersensitivity (Paw-pressure test), nociceptin/orphanin FQ (N/OFQ; 0.3-3 nmol) significantly increased the pain threshold without reaching the values of the control animals. The N/OFQ peptide (NOP) receptor full agonist UFP-112 reverted pain threshold alterations at lower dosage (0.1 nmol) vs morphine and N/OFQ, the partial agonist UFP-113 (0.1-1 nmol) was similar to N/OFQ. The higher efficacy of morphine vs N/OFQ was highlighted also in paclitaxel-treated rats. The mechanical hypersensitivity was fully reverted by 0.1 nmol UFP-112 and UFP-113. In conclusion, intrathecal μ opioid peptide (MOP) and NOP receptor agonists relieved chemotherapy-induced neuropathic pain. The synthetic peptides showed valuable potency and efficacy suggesting the NOP system as an exploitable target.
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Affiliation(s)
- Laura Micheli
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba, Pharmacology and Toxicology Section, University of Florence, Florence, Italy
| | - Lorenzo Di Cesare Mannelli
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba, Pharmacology and Toxicology Section, University of Florence, Florence, Italy.
| | - Anna Rizzi
- Department of Medical Sciences, Section of Pharmacology and National Institute of Neuroscience, University of Ferrara, Italy
| | - Remo Guerrini
- Department of Chemical and Pharmaceutical Sciences and LTTA, University of Ferrara, Ferrara, Italy
| | - Claudio Trapella
- Department of Chemical and Pharmaceutical Sciences and LTTA, University of Ferrara, Ferrara, Italy
| | - Girolamo Calò
- Department of Medical Sciences, Section of Pharmacology and National Institute of Neuroscience, University of Ferrara, Italy
| | - Carla Ghelardini
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba, Pharmacology and Toxicology Section, University of Florence, Florence, Italy
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Li D, Lee Y, Kim W, Lee K, Bae H, Kim SK. Analgesic Effects of Bee Venom Derived Phospholipase A(2) in a Mouse Model of Oxaliplatin-Induced Neuropathic Pain. Toxins (Basel) 2015; 7:2422-34. [PMID: 26131771 PMCID: PMC4516921 DOI: 10.3390/toxins7072422] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 06/11/2015] [Accepted: 06/23/2015] [Indexed: 12/20/2022] Open
Abstract
A single infusion of oxaliplatin, which is widely used to treat metastatic colorectal cancer, induces specific sensory neurotoxicity signs that are triggered or aggravated when exposed to cold or mechanical stimuli. Bee Venom (BV) has been traditionally used in Korea to treat various pain symptoms. Our recent study demonstrated that BV alleviates oxaliplatin-induced cold allodynia in rats, via noradrenergic and serotonergic analgesic pathways. In this study, we have further investigated whether BV derived phospholipase A2 (bvPLA2) attenuates oxaliplatin-induced cold and mechanical allodynia in mice and its mechanism. The behavioral signs of cold and mechanical allodynia were evaluated by acetone and a von Frey hair test on the hind paw, respectively. The significant allodynia signs were observed from one day after an oxaliplatin injection (6 mg/kg, i.p.). Daily administration of bvPLA2 (0.2 mg/kg, i.p.) for five consecutive days markedly attenuated cold and mechanical allodynia, which was more potent than the effect of BV (1 mg/kg, i.p.). The depletion of noradrenaline by an injection of N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine hydrochloride (DSP4, 50 mg/kg, i.p.) blocked the analgesic effect of bvPLA2, whereas the depletion of serotonin by injecting DL-p-chlorophenylalanine (PCPA, 150 mg/kg, i.p.) for three successive days did not. Furthermore, idazoxan (α2-adrenegic receptor antagonist, 1 mg/kg, i.p.) completely blocked bvPLA2-induced anti-allodynic action, whereas prazosin (α1-adrenegic antagonist, 10 mg/kg, i.p.) did not. These results suggest that bvPLA2 treatment strongly alleviates oxaliplatin-induced acute cold and mechanical allodynia in mice through the activation of the noradrenergic system, via α2-adrenegic receptors, but not via the serotonergic system.
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Affiliation(s)
- Dongxing Li
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
| | - Younju Lee
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
| | - Woojin Kim
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
| | - Kyungjin Lee
- Department of Herbology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
| | - Hyunsu Bae
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
| | - Sun Kwang Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
- Department of East-West Medicine, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdamoon-gu, Seoul 130-701, Korea.
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Poupon L, Kerckhove N, Vein J, Lamoine S, Authier N, Busserolles J, Balayssac D. Minimizing chemotherapy-induced peripheral neuropathy: preclinical and clinical development of new perspectives. Expert Opin Drug Saf 2015; 14:1269-82. [DOI: 10.1517/14740338.2015.1056777] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Mangaiarkkarasi A, Rameshkannan S, Ali RM. Effect of Gabapentin and Pregabalin in Rat Model of Taxol Induced Neuropathic Pain. J Clin Diagn Res 2015; 9:FF11-4. [PMID: 26155495 DOI: 10.7860/jcdr/2015/13373.5955] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 04/09/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND Chemotherapy induced neuropathy pain remains as a major dose limiting side effect of many commonly used chemotherapeutic drugs. Presently newer antiepileptic agents have been developed with improved safety and tolerability profiles in alleviating neuropathic pain. OBJECTIVES To evaluate the effect of Gabapentin and Pregabalin in Paclitaxel (Taxol) induced neuropathic pain and to compare the effect of these drugs in animal models. MATERIALS AND METHODS Rats were randomly divided into four groups of six animals each. Group 1- vehicle, Group 2 - Paclitaxel (2mg/kg), Group 3 - Gabapentin (60mg/kg) with Paclitaxel, Group 4 - Pregabalin (30mg/kg) with Paclitaxel. Pain was induced by intraperitoneal injection of Paclitaxel on four alternate days. After taking the baseline values, the drugs treated groups (group 3 and 4) were administered with respective drugs once a day orally for eight consecutive days along with paclitaxel. All the animals were tested for thermal hyperalgesia and cold allodynia on day 0, 7, 14, 21 and 28 with Radiant heat method and Tail immersion test, Acetone drop method respectively. RESULTS In Radiant heat method, gabapentin and pregabalin treated animals found to have significant increase in the tail latency period compared to control and paclitaxel treated groups in all periods of observation. Acetone drop test and tail immersion test also showed significant response similar to Radiant heat method. Pregabalin showed highly significant effect when compared to gabapentin group. CONCLUSION Both gabapentin and pregabalin produced significant anti-hyperalgesic and anti-allodynic effects in experimental animal models. Pregabalin treated group showed highly significant effect compared to gabapentin treated animals.
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Affiliation(s)
- A Mangaiarkkarasi
- Professor, Department of Pharmacology, Sri Manakula Vinayagar Medical College and Hospital , Puducherry, India
| | - S Rameshkannan
- Postgraduate, Department of Pharmacology, Sri Manakula Vinayagar Medical College and Hospital , Puducherry, India
| | - R Meher Ali
- Professor and Head, Department of Pharmacology, Sri Manakula Vinayagar Medical College and Hospital , Puducherry, India
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Korkmaz M, Saritas TB, Sevimli A, Saritas ZK, Elitok B. The effect of gabapentin and pregabalin on intestinal incision wound healing in rabbits. Vet World 2015; 8:279-83. [PMID: 27047085 PMCID: PMC4774831 DOI: 10.14202/vetworld.2015.279-283] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 01/15/2015] [Accepted: 01/25/2015] [Indexed: 11/17/2022] Open
Abstract
AIM To evaluate the macroscopic and histologic effects of pregabalin (PG) gabapentin (GB) on longitudinal intestinal wound healing in New Zealand rabbits. MATERIALS AND METHODS The animals were divided into three groups randomly; the control group (n=6), PG group (n=6) and GB group (n=6). All animals were premedicated with xylazine HCI, 5 mg/kg i.m. and general anaesthesia was performed by ketamine HCI 50 mg/kg i.m injection. A 4 cm incision in the caecum through median laparotomy was achieved under aseptic surgery. Intestinal wound was closed with double-sutured. All animals were received parenteral antibiotic treatment for 5 days. PG and GB groups were treated by PG (30 mg/kg, oral, daily) and GB (30 mg/kg, oral, daily) for 10 days respectively. Control group did not receive any treatment. The animals were euthanized on day 10 and the caecum was examined by laparotomy. Adhesion formation was observed, and tissue samples were taken from suture lines for histologic examination. Cellular infiltration (polymorphonuclear white blood cells and mononuclear cells), accumulation of connective tissue, vascularization and extent of necrosis were evaluated and scored separately for each of mucosal, submucosal, muscular and serosal layers of caecum. RESULTS Adhesions were more severe in the GB group compared to other groups. No statistically significant differences were detected among the three groups about the wound healing. CONCLUSION It was suggested that the use of gabapentinoids had no significant effect on wound healing in patients undergoing gastrointestinal surgery and further studies with treatment periods longer than 10 days are needed.
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Affiliation(s)
- M. Korkmaz
- Department of Surgery, Faculty of Veterinary Medicine, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey
| | - T. B. Saritas
- Department of Anaesthesiology and Reanimation, Meram Medical School, Necmettin Erbakan University, 42080, Konya, Turkey
| | - A. Sevimli
- Department of Pathology, Faculty of Veterinary Medicine, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey
| | - Z. K. Saritas
- Department of Surgery, Faculty of Veterinary Medicine, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey
| | - B. Elitok
- Department of Internal Medicine, Faculty of Veterinary Medicine, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey
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Yoon H, Kim MJ, Yoon I, Li DX, Bae H, Kim SK. Nicotinic Acetylcholine Receptors Mediate the Suppressive Effect of an Injection of Diluted Bee Venom into the GV3 Acupoint on Oxaliplatin-Induced Neuropathic Cold Allodynia in Rats. Biol Pharm Bull 2015; 38:710-4. [DOI: 10.1248/bpb.b14-00797] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Heera Yoon
- Department of Physiology, College of Korean Medicine, Kyung Hee University
| | - Min Joon Kim
- Department of East-West Medicine, Graduate School, Kyung Hee University
| | - Insoo Yoon
- Department of Physiology, College of Korean Medicine, Kyung Hee University
| | - Dong Xing Li
- Department of Physiology, College of Korean Medicine, Kyung Hee University
| | - Hyunsu Bae
- Department of Physiology, College of Korean Medicine, Kyung Hee University
| | - Sun Kwang Kim
- Department of East-West Medicine, Graduate School, Kyung Hee University
- Department of Physiology, College of Korean Medicine, Kyung Hee University
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Yin K, Zimmermann K, Vetter I, Lewis RJ. Therapeutic opportunities for targeting cold pain pathways. Biochem Pharmacol 2015; 93:125-40. [DOI: 10.1016/j.bcp.2014.09.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 09/25/2014] [Accepted: 09/25/2014] [Indexed: 12/13/2022]
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Serotonergic mechanism of the relieving effect of bee venom acupuncture on oxaliplatin-induced neuropathic cold allodynia in rats. Altern Ther Health Med 2014; 14:471. [PMID: 25481535 PMCID: PMC4295325 DOI: 10.1186/1472-6882-14-471] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 12/02/2014] [Indexed: 12/27/2022]
Abstract
Background Oxaliplatin, an important chemotherapy drug for advanced colorectal cancer, often induces peripheral neuropathy, especially cold allodynia. Our previous study showed that bee venom acupuncture (BVA), which has been traditionally used in Korea to treat various pain symptoms, potently relieves oxaliplatin-induced cold allodynia in rats. However, the mechanism for this anti-allodynic effect of BVA remains poorly understood. We investigated whether and how the central serotonergic system, a well-known pathway for acupuncture analgesia, mediates the relieving effect of BVA on cold allodynia in oxaliplatin-injected rats. Methods The behavioral signs of cold allodynia in Sprague–Dawley (SD) rats were induced by a single injection of oxaliplatin (6 mg/kg, i.p.). Before and after BVA treatment, the cold allodynia signs were evaluated by immersing the rat’s tail into cold water (4°C) and measuring the withdrawal latency. For BVA treatment, a diluted BV (0.25 mg/kg) was subcutaneously administered into Yaoyangguan (GV3) acupoint, which is located between the spinous processes of the fourth and the fifth lumbar vertebra. Serotonin was depleted by a daily injection of DL-p-chlorophenylalanine (PCPA, 150 mg/kg, i.p.) for 3 days. The amount of serotonin in the spinal cord was measured by ELISA. Serotonergic receptor antagonists were administered intraperitoneally or intrathecally before BVA treatment. Results The serotonin levels in the spinal cord were significantly increased by BVA treatment and such increase was significantly reduced by PCPA. This PCPA pretreatment abolished the relieving effect of BVA on oxaliplatin-induced cold allodynia. Either of methysergide (mixed 5-HT1/5-HT2 receptor antagonist, 1 mg/kg, i.p.) or MDL-72222 (5-HT3 receptor antagonist, 1 mg/kg, i.p) blocked the anti-allodynic effect of BVA. Further, an intrathecal injection of MDL-72222 (12 μg) completely blocked the BVA-induced anti-allodynic action, whereas NAN-190 (5-HT1A receptor antagonist, 15 μg, i.t.) or ketanserin (5-HT2A receptor antagonist, 30 μg, i.t.) did not. Conclusions These results suggest that BVA treatment alleviates oxaliplatin-induced acute cold allodynia in rats via activation of the serotonergic system, especially spinal 5-HT3 receptors. Thus, our findings may provide a clinically useful evidence for the application of BVA as an alternative therapeutic option for the management of peripheral neuropathy, a dose-limiting side effect that occurs after an administration of oxaliplatin.
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Gyejigachulbu-Tang Relieves Oxaliplatin-Induced Neuropathic Cold and Mechanical Hypersensitivity in Rats via the Suppression of Spinal Glial Activation. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:436482. [PMID: 25505922 PMCID: PMC4251814 DOI: 10.1155/2014/436482] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 11/01/2014] [Accepted: 11/01/2014] [Indexed: 12/21/2022]
Abstract
Activation of spinal glial cells plays a crucial role in the pathogenesis of neuropathic pain. An administration of oxaliplatin, an important anticancer drug, often induces acute neuropathic cold hypersensitivity and/or mechanical hypersensitivity in patients. Gyejigachulbu-tang (GBT), a herbal formula comprising Cinnamomi Cortex, Paeoniae Radix, Atractylodis Lanceae Rhizoma, Zizyphi Fructus, Glycyrrhizae Radix, Zingiberis Rhizoma, and Aconiti Tuber, has been used in East Asia to treat various pain symptoms, especially in cold patients. This study investigated whether and how GBT alleviates oxaliplatin-induced cold and mechanical hypersensitivity in rats. The behavioral signs of cold and mechanical hypersensitivity were evaluated by a tail immersion test in cold water (4°C) and a von Frey hair test, respectively. The significant cold and mechanical hypersensitivity were observed 3 days after an oxaliplatin injection (6 mg/kg, i.p.). Daily oral administration of GBT (200, 400, and 600 mg/kg) for 5 days markedly attenuated cold and mechanical hypersensitivity. Immunoreactivities of glial fibrillary acidic protein (GFAP, astrocyte marker) and OX-42 (microglia marker) in the spinal dorsal horn were significantly increased by an oxaliplatin injection, which were restored by GBT administration. These results indicate that GBT relieves oxaliplatin-induced cold and mechanical hypersensitivity in rats possibly through the suppression of spinal glial activation.
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Aoki M, Kurauchi Y, Mori A, Nakahara T, Sakamoto K, Ishii K. Comparison of the effects of single doses of elcatonin and pregabalin on oxaliplatin-induced cold and mechanical allodynia in rats. Biol Pharm Bull 2014; 37:322-6. [PMID: 24492729 DOI: 10.1248/bpb.b13-00735] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Oxaliplatin frequently causes peripheral neuropathy. Clinical studies have indicated that pregabalin ameliorates oxaliplatin-induced peripheral neuropathy. However, pregabalin frequently causes dizziness and somnolence. We previously reported that elcatonin, a synthetic analog of eel calcitonin, attenuated oxaliplatin-induced cold and mechanical allodynia in rats. The aim of the present study was to compare the anti-allodynic effects of elcatonin and pregabalin in the rats developing the oxaliplatin-induced neuropathy. Male Sprague-Dawley rats were treated with a single dose of oxaliplatin (6 mg/kg, intraperitoneally (i.p.)) to induce cold and mechanical allodynia. We assessed the effects of subcutaneous elcatonin (20 U/kg) and oral pregabalin (30 mg/kg) on cold and mechanical allodynia by cold stimulation (8°C) to the hind paw of the rats and the von Frey test, respectively. Elcatonin reversed the effects of oxaliplatin-induced cold and mechanical allodynia in rats for a longer time period than pregabalin does. These results suggested that elcatonin might be useful for the clinical treatment of oxaliplatin-induced neuropathy.
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Affiliation(s)
- Manahito Aoki
- Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences
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Aydogan E, Comoglu T, Pehlivanoglu B, Dogan M, Comoglu S, Dogan A, Basci N. Process and formulation variables of pregabalin microspheres prepared by w/o/o double emulsion solvent diffusion method and their clinical application by animal modeling studies. Drug Dev Ind Pharm 2014; 41:1311-20. [DOI: 10.3109/03639045.2014.948452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Zhao M, Nakamura S, Miyake T, So K, Shirakawa H, Tokuyama S, Narita M, Nakagawa T, Kaneko S. Pharmacological characterization of standard analgesics on oxaliplatin-induced acute cold hypersensitivity in mice. J Pharmacol Sci 2014; 124:514-7. [PMID: 24671055 DOI: 10.1254/jphs.13249sc] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Oxaliplatin, a platinum-based chemotherapeutic agent, causes an acute peripheral neuropathy triggered by cold in almost all patients during or within hours after its infusion. We recently reported that a single administration of oxaliplatin induced cold hypersensitivity 2 h after the administration in mice. In this study, we examined whether standard analgesics relieve the oxaliplatin-induced acute cold hypersensitivity. Gabapentin, tramadol, mexiletine, and calcium gluconate significantly inhibited and morphine and milnacipran decreased the acute cold hypersensitivity, while diclofenac and amitriptyline had no effects. These results suggest that gabapentin, tramadol, mexiletine, and calcium gluconate are effective against oxaliplatin-induced acute peripheral neuropathy.
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Affiliation(s)
- Meng Zhao
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Japan
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Moon HJ, Lim BS, Lee DI, Ye MS, Lee G, Min BI, Bae H, Na HS, Kim SK. Effects of electroacupuncture on oxaliplatin-induced neuropathic cold hypersensitivity in rats. J Physiol Sci 2014; 64:151-6. [PMID: 24158835 PMCID: PMC10717245 DOI: 10.1007/s12576-013-0297-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 10/07/2013] [Indexed: 12/26/2022]
Abstract
This study investigated whether and how electroacupuncture (EA) attenuates cold hypersensitivity (allodynia) in a rat model of oxaliplatin-induced neuropathic pain. Cold allodynia [evaluated by immersing the tail into cold water (4 °C) and measuring the withdrawal latency] was induced 3 days after an oxaliplatin administration (6 mg/kg, i.p.). EA stimulation (2/100 Hz, 0.3-ms pulse duration, 0.2-0.3 mA) was delivered to ST36 acupoint or non-acupoint for 20 min. Low-frequency (2 Hz) EA at ST36 relieved cold allodynia more effectively than high-frequency EA at ST36 or low-frequency EA at non-acupoint. Naloxone (opioid antagonist, 2 mg/kg, i.p.) completely blocked such EA-induced anti-allodynia, whereas phentolamine (α-adrenergic antagonist, 2 mg/kg, i.p.) did not. Moreover, plasma β-endorphin levels significantly increased right after the end of EA and subsequently decreased. These results indicate that low-frequency EA at ST36 in rats has a marked relieving effect on oxaliplatin-induced cold allodynia that is mediated by the endogenous opioid, but not noradrenergic, system.
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Affiliation(s)
- Hak Jin Moon
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul, 130-701 Republic of Korea
| | - Bong-Soo Lim
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul, 130-701 Republic of Korea
| | - Dae-Il Lee
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul, 130-701 Republic of Korea
| | - Min Sook Ye
- Department of Physiology, College of Korean Medicine, Kyung Hee University, #1 Hoegi-dong, Dongdaemoon-gu, Seoul, 130-701 Republic of Korea
| | - Giseog Lee
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul, 130-701 Republic of Korea
- Department of Physiology, College of Korean Medicine, Kyung Hee University, #1 Hoegi-dong, Dongdaemoon-gu, Seoul, 130-701 Republic of Korea
| | - Byung-Il Min
- Department of East-West Medicine, Graduate School, Kyung Hee University, Seoul, 130-701 Republic of Korea
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul, 130-701 Republic of Korea
| | - Hyunsu Bae
- Department of Physiology, College of Korean Medicine, Kyung Hee University, #1 Hoegi-dong, Dongdaemoon-gu, Seoul, 130-701 Republic of Korea
| | - Heung Sik Na
- Department of Physiology, College of Medicine, Korea University, Seoul, 136-705 Republic of Korea
| | - Sun Kwang Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, #1 Hoegi-dong, Dongdaemoon-gu, Seoul, 130-701 Republic of Korea
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Verma V, Singh N, Singh Jaggi A. Pregabalin in neuropathic pain: evidences and possible mechanisms. Curr Neuropharmacol 2014; 12:44-56. [PMID: 24533015 PMCID: PMC3915349 DOI: 10.2174/1570159x1201140117162802] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/02/2013] [Accepted: 09/25/2013] [Indexed: 12/13/2022] Open
Abstract
Pregabalin is an antagonist of voltage gated Ca2+ channels and specifically binds to alpha-2-delta subunit to produce antiepileptic and analgesic actions. It successfully alleviates the symptoms of various types of neuropathic pain and presents itself as a first line therapeutic agent with remarkable safety and efficacy. Preclinical studies in various animal models of neuropathic pain have shown its effectiveness in treating the symptoms like allodynia and hyperalgesia. Clinical studies in different age groups and in different types of neuropathic pain (peripheral diabetic neuropathy, fibromyalgia, post-herpetic neuralgia, cancer chemotherapy-induced neuropathic pain) have projected it as the most effective agent either as monotherapy or in combined regimens in terms of cost effectiveness, tolerability and overall improvement in neuropathic pain states. Preclinical studies employing pregabalin in different neuropathic pain models have explored various molecular targets and the signaling systems including Ca2+ channel-mediated neurotransmitter release, activation of excitatory amino acid transporters (EAATs), potassium channels and inhibition of pathways involving inflammatory mediators. The present review summarizes the important aspects of pregabalin as analgesic in preclinical and clinical studies as well as focuses on the possible mechanisms.
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Affiliation(s)
- Vivek Verma
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala-147002, India
| | - Nirmal Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala-147002, India
| | - Amteshwar Singh Jaggi
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala-147002, India
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Zhao F, Williams M, Bowlby M, Houghton A, Hargreaves R, Evelhoch J, Williams DS. Qualification of fMRI as a biomarker for pain in anesthetized rats by comparison with behavioral response in conscious rats. Neuroimage 2013; 84:724-32. [PMID: 24064074 DOI: 10.1016/j.neuroimage.2013.09.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 09/07/2013] [Accepted: 09/13/2013] [Indexed: 10/26/2022] Open
Abstract
fMRI can objectively measure pain-related neural activities in humans and animals, providing a valuable tool for studying the mechanisms of nociception and for developing new analgesics. However, due to its extreme sensitivity to subject motion, pain fMRI studies are performed in animals that are immobilized, typically with anesthesia. Since anesthesia could confound the nociceptive processes, it is unknown how well nociceptive-related neural activities measured by fMRI in anesthetized animals correlate with nociceptive behaviors in conscious animals. The threshold to vocalization (VT) in response to an increasing noxious electrical stimulus (NES) was implemented in conscious rats as a behavioral measure of nociception. The antinociceptive effect of systemic (intravenous infusion) lidocaine on NES-induced fMRI signals in anesthetized rats was compared with the corresponding VT in conscious rats. Lidocaine infusion increased VT and suppressed the NES-induced fMRI signals in most activated brain regions. The temporal characteristics of the nociception signal by fMRI and by VT in response to lidocaine infusion were highly correlated with each other, and with the pharmacokinetics (PK) of lidocaine. These results indicate that the fMRI activations in these regions may be used as biomarkers of acute nociception in anesthetized rats. Interestingly, systemic lidocaine had no effect on NES-induced fMRI activations in the primary somatosensory cortex (S1), a result that warrants further investigation.
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Effect of bee venom acupuncture on oxaliplatin-induced cold allodynia in rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:369324. [PMID: 24058370 PMCID: PMC3766591 DOI: 10.1155/2013/369324] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 07/18/2013] [Indexed: 12/24/2022]
Abstract
Oxaliplatin, a chemotherapy drug, often leads to neuropathic cold allodynia after a single administration. Bee venom acupuncture (BVA) has been used in Korea to relieve various pain symptoms and is shown to have a potent antiallodynic effect in nerve-injured rats. We examined whether BVA relieves oxaliplatin-induced cold allodynia and which endogenous analgesic system is implicated. The cold allodynia induced by an oxaliplatin injection (6 mg/kg, i.p.) was evaluated by immersing the rat's tail into cold water (4°C) and measuring the withdrawal latency. BVA (1.0 mg/kg, s.c.) at Yaoyangguan (GV3), Quchi (LI11), or Zusanli (ST36) acupoints significantly reduced cold allodynia with the longest effect being shown in the GV3 group. Conversely, a high dose of BVA (2.5 mg/kg) at GV3 did not show a significant antiallodynic effect. Phentolamine (α-adrenergic antagonist, 2 mg/kg, i.p.) partially blocked the relieving effect of BVA on allodynia, whereas naloxone (opioid antagonist, 2 mg/kg, i.p.) did not. We further confirmed that an intrathecal administration of idazoxan (α2-adrenergic antagonist, 50 μg) blocked the BVA-induced anti-allodynic effect. These results indicate that BVA alleviates oxaliplatin-induced cold allodynia in rats, at least partly, through activation of the noradrenergic system. Thus, BVA might be a potential therapeutic option in oxaliplatin-induced neuropathy.
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Aoki M, Mori A, Nakahara T, Sakamoto K, Ishii K. Salmon calcitonin reduces oxaliplatin-induced cold and mechanical allodynia in rats. Biol Pharm Bull 2013; 36:326-9. [PMID: 23370362 DOI: 10.1248/bpb.b12-00887] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Oxaliplatin is commonly used anti-cancer drugs, but it frequently causes peripheral neuropathic pain. Recently, we reported that elcatonin, a synthetic analog of eel calcitonin, attenuated the oxaliplatin- and paclitaxel-induced cold and mechanical allodynia in rats. In the present study, we determined whether salmon calcitonin also had anti-allodynic effects on oxaliplatin-induced neuropathy in rats. The rats were treated with a single dose of oxaliplatin (6 mg/kg, intraperitoneally (i.p.)). Oxaliplatin resulted in cold and mechanical allodynia. We assessed the anti-allodynic effects of subcutaneously administered salmon calcitonin (20 U/kg/d) by cold stimulation (8°C) directly to the hind paw of the rats and by using the von Frey test. Salmon calcitonin almost completely reversed the effects of both cold and mechanical allodynia. These results suggest that salmon calcitonin is also useful for treatment of oxaliplatin-induced neuropathy clinically.
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Affiliation(s)
- Manahito Aoki
- Department of Molecular Pharmacology, School of Pharmaceutical Sciences, Kitasato University, 5–9–1 Shirokane, Minato-ku, Tokyo 108–8641, Japan
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Effect of synthetic eel calcitonin, elcatonin, on cold and mechanical allodynia induced by oxaliplatin and paclitaxel in rats. Eur J Pharmacol 2012; 696:62-9. [PMID: 23001015 DOI: 10.1016/j.ejphar.2012.09.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 08/27/2012] [Accepted: 09/06/2012] [Indexed: 11/23/2022]
Abstract
Oxaliplatin and paclitaxel are commonly used anti-cancer drugs, but they frequently cause peripheral neuropathic pain. In this study, we investigated the effect of elcatonin, a synthetic eel calcitonin, on oxaliplatin- and paclitaxel-induced neuropathy in rats. The rats were treated with a single dose of oxaliplatin (6 mg/kg, i.p.) or repeated doses of paclitaxel (2 mg/kg, i.p.) on 4 alternate days. Both treatments resulted in cold and mechanical allodynia. We assessed the anti-allodynic effects of subcutaneously administered elcatonin (20 U/kg/day) by using a newly developed method to provide cold stimulation (8°C) directly to the hind paw of the rats and by using the von Frey test. Elcatonin almost completely reversed the effects of both cold and mechanical allodynia. To determine the mechanism of this anti-allodynic effect, we examined the effect of elcatonin on neuropathy induced by intraplantar injection of two organic compounds: allyl isothiocyanate (1 nmol/paw), which activates transient receptor potential ankyrin-1 channels, and menthol (1.28 μmol/paw), which activates transient receptor potential ankyrin-1 and melastatin-8. Pre-administration of elcatonin almost completely prevented cold and mechanical allodynia from being induced by both compounds. These results suggest that elcatonin attenuates oxaliplatin- and paclitaxel-induced neuropathic pain by inhibiting the cellular signaling related to transient receptor potential ankyrin-1 and melastatin-8. Thus, we conclude that administration of elcatonin may improve the quality of life of cancer patients receiving chemotherapy.
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Namvaran-Abbas-Abad A, Tavakkoli F. Antinociceptive Effect of Salvia Extract on Cisplatin-Induced Hyperalgesia in Mice. NEUROPHYSIOLOGY+ 2012. [DOI: 10.1007/s11062-012-9249-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Martinez JA, Kasamatsu M, Rosales-Hernandez A, Hanson LR, Frey WH, Toth CC. Comparison of central versus peripheral delivery of pregabalin in neuropathic pain states. Mol Pain 2012; 8:3. [PMID: 22236461 PMCID: PMC3285045 DOI: 10.1186/1744-8069-8-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 01/11/2012] [Indexed: 11/10/2022] Open
Abstract
Background Although pregabalin therapy is beneficial for neuropathic pain (NeP) by targeting the CaVα2δ-1 subunit, its site of action is uncertain. Direct targeting of the central nervous system may be beneficial for the avoidance of systemic side effects. Results We used intranasal, intrathecal, and near-nerve chamber forms of delivery of varying concentrations of pregabalin or saline delivered over 14 days in rat models of experimental diabetic peripheral neuropathy and spinal nerve ligation. As well, radiolabelled pregabalin was administered to determine localization with different deliveries. We evaluated tactile allodynia and thermal hyperalgesia at multiple time points, and then analyzed harvested nervous system tissues for molecular and immunohistochemical changes in CaVα2δ-1 protein expression. Both intrathecal and intranasal pregabalin administration at high concentrations relieved NeP behaviors, while near-nerve pregabalin delivery had no effect. NeP was associated with upregulation of CACNA2D1 mRNA and CaVα2δ-1 protein within peripheral nerve, dorsal root ganglia (DRG), and dorsal spinal cord, but not brain. Pregabalin's effect was limited to suppression of CaVα2δ-1 protein (but not CACNA2D1 mRNA) expression at the spinal dorsal horn in neuropathic pain states. Dorsal root ligation prevented CaVα2δ-1 protein trafficking anterograde from the dorsal root ganglia to the dorsal horn after neuropathic pain initiation. Conclusions Either intranasal or intrathecal pregabalin relieves neuropathic pain behaviours, perhaps due to pregabalin's effect upon anterograde CaVα2δ-1 protein trafficking from the DRG to the dorsal horn. Intranasal delivery of agents such as pregabalin may be an attractive alternative to systemic therapy for management of neuropathic pain states.
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Affiliation(s)
- Jose A Martinez
- Department of Clinical Neurosciences and the University of Calgary, Calgary, AB, Canada
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