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Chung SW, Chung SH, Kim DH, Lee HJ, Park EJJ, Shim BJ, Kim DH, Yoon JP. Effect of Gabapentin on Tendon-to-Bone Healing in a Rat Model of Rotator Cuff Repair. Orthopedics 2024:1-6. [PMID: 39073040 DOI: 10.3928/01477447-20240718-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
BACKGROUND Gabapentin is often used as an analgesic after rotator cuff repair surgery and is recommended as an additional analgesic for arthroscopic rotator cuff repairs. However, evidence of its effects on biological healing mechanisms is lacking. The objective of this study was to investigate the potential of gabapentin in improving tendon-to-bone healing after rotator cuff repair using a rat model. MATERIALS AND METHODS A total of 20 male rats were randomly allocated to one of two groups: group 1 (repair only, n=10) or group 2 (gabapentin injection, n=10). The rats in the experimental group (group 2) were administered 80 mg/kg of gabapentin subcutaneously 30 minutes before surgery, followed by 80 mg/kg subcutaneously every 24 hours for 48 hours. We used the left shoulder of every rat, while for biomechanical analysis, we used the right shoulder. RESULTS There was no significant difference in the load to failure, ultimate stress, or elongation between the groups. Collagen continuity, orientation, and density were better in group 2 than group 1. CONCLUSION In a rat model of rotator cuff repair, gabapentin had a positive impact on the quality of collagen organization at the junction between the tendon and bone, while preserving the biomechanical properties. We propose the use of gabapentin as a supplementary analgesic agent for postoperative pain relief after arthroscopic rotator cuff repair; however, further studies of the effect of gabapentin on biological healing mechanisms are required. [Orthopedics. 202x;4x(x):xx-xx.].
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Sathe PS, Prabhu DV, Ravikumar P, Bolton LL. Alternative Wound Management: Translating Science into Practice. Adv Skin Wound Care 2021; 34:517-524. [PMID: 34546202 DOI: 10.1097/01.asw.0000772872.03584.ae] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
GENERAL PURPOSE To present a scoping review of preclinical and clinical trial evidence supporting the efficacy and/or safety of major alternative wound care agents to summarize their effects on validated elements of wound bed preparation and wound management paradigms. TARGET AUDIENCE This continuing education activity is intended for physicians, physician assistants, nurse practitioners, and nurses with an interest in skin and wound care. LEARNING OBJECTIVES/OUTCOMES After participating in this educational activity, the participant will:1. Differentiate the effectiveness of the topical wound care agents included in this review.2. Compare the preventive efficacy of intravenous agents administered to trauma and surgical patients.3. Select the effectiveness of products in this review that are left in place after surgical procedures.4. Identify an oral agent that can be helpful in mitigating the effects of COVID-19.
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Abstract
Self-mutilation and abnormal repetitive behaviors in small mammals are challenging conditions for veterinary practitioners. The etiology may be difficult to identify, and the treatment is often unrewarding unless the specific underlying cause can be found. Reinforcement of the abnormal behavior may also complicate the treatment. However, medical causes, including painful conditions, should be investigated thoroughly. Owing to the small blood volume of many small exotic mammals and the associated risk of hypovolemia in case of hemorrhage, an hospitalization with potent multimodal analgesia and physical barriers to prevent self-mutilation is often warranted. Psychogenic drugs may be useful in some cases.
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Abstract
Currently, there are no established adjuvant drugs for the acceleration of peripheral nerve regeneration. In this paper, we reviewed the literature from the last 10 years and described the drugs proved to accelerate the functional and histological regeneration of the peripheral nerves, either after trauma or in neuropathy experimental models. The vast majority of the studies were experimental with very few small clinical studies, which indicates the need for prospective randomized studies to identify the best drugs to use as adjuvants for nerve regeneration.
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Affiliation(s)
- Olimpiu Bota
- Department of Plastic and Hand Surgery, University Center of Orthopedics and Trauma Surgery, University Hospital Carl Gustav Carus , Dresden , Germany
| | - Lucian Fodor
- Department of Plastic Surgery, First Surgical Clinic, Emergency District Hospital , Cluj-Napoca , Romania
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da Cunha Leal P, Rey Moura EC, Jorge Dino Cossetti R, Ramos do Nascimento J, Portela Bogéa Serra IC, de Paulo Ribeiro B, Álvares Marques Vale A, Silva de Azevedo Dos Santos AP, Fernandes do Nascimento FR, Kimiko Sakata R. High dose gabapentin does not alter tumor growth in mice but reduces arginase activity and increases superoxide dismutase, IL-6 and MCP-1 levels in Ehrlich ascites. BMC Res Notes 2019; 12:59. [PMID: 30683148 PMCID: PMC6347815 DOI: 10.1186/s13104-019-4103-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 01/19/2019] [Indexed: 12/19/2022] Open
Abstract
Objectives The purpose of this study was to evaluate the effect of gabapentin on Ehrlich tumor growth in Swiss mice, a highly aggressive and inflammatory tumor model. Mice were grouped into sets of 5 animals and treated from days 2 to 8 with gabapentin 30 mg/kg body weight (G30) or 100 mg/kg body weight (G100), or normal sterile saline (control). Results The mice were euthanized on day 10. Tumor growth, tumoricidal agents and inflammatory cytokines levels were assessed. At day 10, G30 and G100 mice gained weight, but there were no differences in tumor cell count or in ascites volume. In G100, there was a reduction in arginase and an increase in SOD activities. There was an increase in IL-6 and MCP-1 levels, especially in G100, but no alterations in TNF-α. There was no direct evidence of tumor induction by gabapentin. However, the findings suggest that its use modulates immune response to a more effector and less deleterious profile, with increase in activity of anti-oxidant enzymes and in cytokines that favor activation of macrophages, which could improve the general status of the tumor host. Electronic supplementary material The online version of this article (10.1186/s13104-019-4103-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Plinio da Cunha Leal
- Federal University of Maranhão, São Luís, MA, Brazil. .,Rua das Boninas, Bloco 2, apartment 1202, condomínio Ile Saint Louis, São Luís, MA, 65077-552, Brazil.
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Castel D, Sabbag I, Nasaev E, Peng S, Meilin S. Open field and a behavior score in PNT model for neuropathic pain in pigs. J Pain Res 2018; 11:2279-2293. [PMID: 30349354 PMCID: PMC6188018 DOI: 10.2147/jpr.s172300] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Background Rodent models are frequently used in the research of pain and continue to provide valuable data on the mechanisms driving pain, although they are criticized due to limited translational ability to human conditions. Previously we have suggested pigs as a model for development of drugs for neuropathic pain. In this study, we investigate the spontaneous behavior of pigs following peripheral neuritis trauma (PNT)-induced neuropathic pain. Methods A computerized monitoring system was used to evaluate the changes in open field test in addition to applying a composite behavior scoring system. The data suggest that the PNT operation did not affect the animal’s ability to walk as the total distance walked by PNT animals was not significantly different from the total distance walked by sham-operated animals. However, PNT animals expressed a significant change in the pattern of walking. This effect was unrelated to the time that the animals spent in the open field. Following treatment with different drugs (morphine, buprenorphine, or gabapentin), the walking pattern of the animals in the open field changed in a drug-specific manner. In addition, the detailed behavior score revealed drug-specific changes following treatment. Results Pharmacokinetic analysis of the drug concentration in blood and cerebrospinal fluid correlated with the behavioral analysis. Conclusion The data of this study suggest that the open field test together with the detailed behavior score applied in this model are a powerful tool to assess the spontaneous behavior of pigs following PNT-induced neuropathic pain.
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Affiliation(s)
- David Castel
- The Neufeld Cardiac Research Institute, Sheba Medical Centre, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Itai Sabbag
- Lahav Research Institute, Kibutz Lahav, Negev, Israel
| | - Elvira Nasaev
- Neurology R&D Division, MD Biosciences, Ness Ziona, Israel,
| | - Sean Peng
- Touchstone Biosciences, Plymouth Meeting, PA, USA
| | - Sigal Meilin
- Neurology R&D Division, MD Biosciences, Ness Ziona, Israel,
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Antiepileptic drugs as analgesics/adjuvants in inflammatory pain: current preclinical evidence. Pharmacol Ther 2018; 192:42-64. [PMID: 29909236 DOI: 10.1016/j.pharmthera.2018.06.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/04/2018] [Indexed: 12/20/2022]
Abstract
Inflammatory pain is the most common type of pain that is treated clinically. The use of currently available treatments (classic analgesics - NSAIDs, paracetamol and opioids) is limited by insufficient efficacy and/or side effects/tolerance development. Antiepileptic drugs (AEDs) are widely used in neuropathic pain treatment, but there is substantial preclinical evidence on their efficacy against inflammatory pain, too. In this review we focus on gabapentinoids (gabapentin and pregabalin) and dibenzazepine AEDs (carbamazepine, oxcarbazepine, and recently introduced eslicarbazepine acetate) and their potential for relieving inflammatory pain. In models of somatic, visceral and trigeminal inflammatory pain, that have a translational value for inflammatory conditions in locomotor system, viscera and head/face, AEDs have demonstrated analgesic activity. This activity was mostly consistent, dependent on the dose and largely independent on the site of inflammation and method of its induction, nociceptive stimuli, species, specific drug used, its route of administration and dosing schedule. AEDs exerted comparable efficacy with classic analgesics. Effective doses of AEDs are lower than toxic doses in animals and, when expressed as equivalent human doses, they are largely overlapping with AEDs doses already used in humans for treating epilepsy/neuropathic pain. The main mechanism of antinociceptive/antihyperalgesic action of gabapentinoids in inflammatory pain models seems to be α2δ-dependent suppression of voltage-gated calcium channels in primary sensory neurons that leads to reduced release of neurotransmitters in the spinal/medullar dorsal horn. The suppression of NMDA receptors via co-agonist binding site primarily at spinal sites, activation of various types of K+ channels at spinal and peripheral sites, and activation of noradrenergic and serotonergic descending pain modulatory pathways may also contribute. Inhibition of voltage-gated sodium channels along the pain pathway is probably the main mechanism of antinociceptive/antihyperalgesic effects of dibenzazepines. The recruitment of peripheral adrenergic and purinergic mechanisms and central GABAergic mechanisms may also contribute. When co-administered with classic/other alternative analgesics, AEDs exerted synergistic/additive interactions. Reviewed data could serve as a basis for clinical studies on the efficacy/safety of AEDs as analgesics/adjuvants in patients with inflammatory pain, and contribute to the improvement of the treatment of various inflammatory pain states.
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Chincholkar M. Analgesic mechanisms of gabapentinoids and effects in experimental pain models: a narrative review. Br J Anaesth 2018; 120:1315-1334. [DOI: 10.1016/j.bja.2018.02.066] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 02/07/2018] [Accepted: 03/14/2018] [Indexed: 12/17/2022] Open
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Effects of Methanol Fraction from Leaves of Schinus terebinthifolius Raddi on Nociception and Spinal-Cord Oxidative Biomarkers in Rats with Neuropathic Pain. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:5783412. [PMID: 29853960 PMCID: PMC5960562 DOI: 10.1155/2018/5783412] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/02/2018] [Indexed: 01/05/2023]
Abstract
We determined the antioxidant potential of fractions obtained from leaves of Schinus terebinthifolius, a medicinal plant known in Brazil as aroeira, to select the fraction with the best yield and antioxidant performance. These qualities were found in the methanol fraction (MeF), which was administered intraperitoneally (20 mg/kg/day) for 3 and 10 days to rats with chronic constriction injury (CCI) of the sciatic nerve, a model of neuropathic pain. The MeF increased the mechanical and thermal thresholds that had been lowered by CCI. In parallel, the lumbosacral spinal cord showed an increase in superoxide dismutase but a decrease in glutathione peroxidase and glutathione-S-transferase activities in saline- and MeF-treated CCI rats. Catalase activity decreased only in saline-treated CCI rats for 10 days. Total thiols decreased in saline- and MeF-treated CCI rats. Ascorbic acid increased in these rats at day 3 but only in saline-treated CCI rats at day 10. No change was found in hydrogen peroxide and lipid hydroperoxide. Open-field and elevated plus-maze tests and blood parameters of liver function did not change. Thus, the MeF from leaves of S. terebinthifolius has an antinociceptive action with no toxic effects, and it affects oxidant biomarkers in the spinal cord of rats with CCI.
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Alvites R, Rita Caseiro A, Santos Pedrosa S, Vieira Branquinho M, Ronchi G, Geuna S, Varejão AS, Colette Maurício A. Peripheral nerve injury and axonotmesis: State of the art and recent advances. COGENT MEDICINE 2018. [DOI: 10.1080/2331205x.2018.1466404] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Rui Alvites
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente (ICETA) da Universidade do Porto, Praça Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal
| | - Ana Rita Caseiro
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente (ICETA) da Universidade do Porto, Praça Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal
- Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto (REQUIMTE/LAQV), R. Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Sílvia Santos Pedrosa
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente (ICETA) da Universidade do Porto, Praça Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal
| | - Mariana Vieira Branquinho
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente (ICETA) da Universidade do Porto, Praça Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal
| | - Giulia Ronchi
- Departamento de Ciências Veterinárias, Universidade de Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Stefano Geuna
- Departamento de Ciências Veterinárias, Universidade de Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Artur S.P. Varejão
- CECAV, Centro de Ciência Animal e Veterinária, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute, University of Turin, Ospedale San Luigi, 10043 Orbassano, Turin, Italy
| | - Ana Colette Maurício
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente (ICETA) da Universidade do Porto, Praça Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal
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Ahmad N, Subhan F, Islam NU, Shahid M, Rahman FU, Sewell RD. Gabapentin and its salicylaldehyde derivative alleviate allodynia and hypoalgesia in a cisplatin-induced neuropathic pain model. Eur J Pharmacol 2017; 814:302-312. [DOI: 10.1016/j.ejphar.2017.08.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 08/03/2017] [Accepted: 08/24/2017] [Indexed: 12/15/2022]
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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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Kremer M, Salvat E, Muller A, Yalcin I, Barrot M. Antidepressants and gabapentinoids in neuropathic pain: Mechanistic insights. Neuroscience 2016; 338:183-206. [PMID: 27401055 DOI: 10.1016/j.neuroscience.2016.06.057] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 06/21/2016] [Accepted: 06/30/2016] [Indexed: 01/20/2023]
Abstract
Neuropathic pain arises as a consequence of a lesion or disease affecting the somatosensory system. It is generally chronic and challenging to treat. The recommended pharmacotherapy for neuropathic pain includes the use of some antidepressants, such as tricyclic antidepressants (TCAs) (amitriptyline…) or serotonin and noradrenaline re-uptake inhibitors (duloxetine…), and/or anticonvulsants such as the gabapentinoids gabapentin or pregabalin. Antidepressant drugs are not acute analgesics but require a chronic treatment to relieve neuropathic pain, which suggests the recruitment of secondary downstream mechanisms as well as long-term molecular and neuronal plasticity. Noradrenaline is a major actor for the action of antidepressant drugs in a neuropathic pain context. Mechanistic hypotheses have implied the recruitment of noradrenergic descending pathways as well as the peripheral recruitment of noradrenaline from sympathetic fibers sprouting into dorsal root ganglia; and importance of both α2 and β2 adrenoceptors have been reported. These monoamine re-uptake inhibitors may also indirectly act as anti-proinflammatory cytokine drugs; and their therapeutic action requires the opioid system, particularly the mu (MOP) and/or delta (DOP) opioid receptors. Gabapentinoids, which target the voltage-dependent calcium channels α2δ-1 subunit, inhibit calcium currents, thus decreasing the excitatory transmitter release and spinal sensitization. Gabapentinoids also activate the descending noradrenergic pain inhibitory system coupled to spinal α2 adrenoceptors. Gabapentinoid treatment may also indirectly impact on neuroimmune actors, like proinflammatory cytokines. These drugs are effective against neuropathic pain both with acute administration at high dose and with repeated administration. This review focuses on mechanistic knowledge concerning chronic antidepressant treatment and gabapentinoid treatment in a neuropathic pain context.
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Affiliation(s)
- Mélanie Kremer
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique, Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Eric Salvat
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique, Strasbourg, France; Centre d'Etude et de Traitement de la Douleur, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - André Muller
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique, Strasbourg, France; Centre d'Etude et de Traitement de la Douleur, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Ipek Yalcin
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique, Strasbourg, France
| | - Michel Barrot
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique, Strasbourg, France.
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Corona-Ramos JN, De la O-Arciniega M, Déciga-Campos M, Medina-López JR, Domínguez-Ramírez AM, Jaramillo-Morales OA, Espinosa-Juárez JV, López-Muñoz FJ. The Antinociceptive Effects of Tramadol and/or Gabapentin on Rat Neuropathic Pain Induced by a Chronic Constriction Injury. Drug Dev Res 2016; 77:217-26. [DOI: 10.1002/ddr.21313] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 05/07/2016] [Indexed: 01/17/2023]
Affiliation(s)
| | - Minarda De la O-Arciniega
- Área Académica de Farmacia del Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo; Pachuca Hidalgo México
| | - Myrna Déciga-Campos
- Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del IPN; C.P. 11340 México D.F. México
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Zhang YB, Guo ZD, Li MY, Fong P, Zhang JG, Zhang CW, Gong KR, Yang MF, Niu JZ, Ji XM, Lv GW. Gabapentin Effects on PKC-ERK1/2 Signaling in the Spinal Cord of Rats with Formalin-Induced Visceral Inflammatory Pain. PLoS One 2015; 10:e0141142. [PMID: 26512901 PMCID: PMC4626203 DOI: 10.1371/journal.pone.0141142] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 10/05/2015] [Indexed: 11/19/2022] Open
Abstract
Currently, the clinical management of visceral pain remains unsatisfactory for many patients suffering from this disease. While preliminary animal studies have suggested the effectiveness of gabapentin in successfully treating visceral pain, the mechanism underlying its analgesic effect remains unclear. Evidence from other studies has demonstrated the involvement of protein kinase C (PKC) and extracellular signal-regulated kinase1/2 (ERK1/2) in the pathogenesis of visceral inflammatory pain. In this study, we tested the hypothesis that gabapentin produces analgesia for visceral inflammatory pain through its inhibitory effect on the PKC-ERK1/2 signaling pathway. Intracolonic injections of formalin were performed in rats to produce colitis pain. Our results showed that visceral pain behaviors in these rats decreased after intraperitoneal injection of gabapentin. These behaviors were also reduced by intrathecal injections of the PKC inhibitor, H-7, and the ERK1/2 inhibitor, PD98059. Neuronal firing of wide dynamic range neurons in L6–S1 of the rat spinal cord dorsal horn were significantly increased after intracolonic injection of formalin. This increased firing rate was inhibited by intraperitoneal injection of gabapentin and both the individual and combined intrathecal application of H-7 and PD98059. Western blot analysis also revealed that PKC membrane translocation and ERK1/2 phosphorylation increased significantly following formalin injection, confirming the recruitment of PKC and ERK1/2 during visceral inflammatory pain. These effects were also significantly reduced by intraperitoneal injection of gabapentin. Therefore, we concluded that the analgesic effect of gabapentin on visceral inflammatory pain is mediated through suppression of PKC and ERK1/2 signaling pathways. Furthermore, we found that the PKC inhibitor, H-7, significantly diminished ERK1/2 phosphorylation levels, implicating the involvement of PKC and ERK1/2 in the same signaling pathway. Thus, our results suggest a novel mechanism of gabapentin-mediated analgesia for visceral inflammatory pain through a PKC-ERK1/2 signaling pathway that may be a future therapeutic target for the treatment of visceral inflammatory pain.
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Affiliation(s)
- Yan-bo Zhang
- Department of Neurology, Affiliated Hospital of Taishan Medical University, Taian, China
- * E-mail:
| | - Zheng-dong Guo
- Department of Endocrinology, Affiliated Hospital of Taishan Medical University, Taian, China
| | - Mei-yi Li
- Department of Neurology, Shandong Taishan Chronic Disease Hospital, Taian, China
| | - Peter Fong
- Department of Neurology, University of California San Francisco, San Francisco, CA, United States of America
| | - Ji-guo Zhang
- Department of Pharmacology, College of Pharmacy, Taishan Medical University, Taian, China
| | - Can-wen Zhang
- Department of Neurology, Affiliated Hospital of Taishan Medical University, Taian, China
| | - Ke-rui Gong
- Department of Oral and Maxillofacial Surgery, University of California San Francisco, San Francisco, CA, United States of America
| | - Ming-feng Yang
- Department of Neurology, Affiliated Hospital of Taishan Medical University, Taian, China
| | - Jing-zhong Niu
- Department of Neurology, Affiliated Hospital of Taishan Medical University, Taian, China
| | - Xun-ming Ji
- Hypoxia Medical Institute, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Guo-wei Lv
- Hypoxia Medical Institute, Xuanwu Hospital, Capital Medical University, Beijing, China
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Câmara CC, Araújo CV, de Sousa KKO, Brito GA, Vale ML, Raposo RDS, Mendonça FE, Mietto BS, Martinez AMB, Oriá RB. Gabapentin attenuates neuropathic pain and improves nerve myelination after chronic sciatic constriction in rats. Neurosci Lett 2015; 607:52-58. [DOI: 10.1016/j.neulet.2015.09.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 07/11/2015] [Accepted: 09/16/2015] [Indexed: 12/14/2022]
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O'Brien PD, Hur J, Hayes JM, Backus C, Sakowski SA, Feldman EL. BTBR ob/ob mice as a novel diabetic neuropathy model: Neurological characterization and gene expression analyses. Neurobiol Dis 2015; 73:348-55. [PMID: 25447227 PMCID: PMC4416075 DOI: 10.1016/j.nbd.2014.10.015] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 10/17/2014] [Accepted: 10/22/2014] [Indexed: 12/25/2022] Open
Abstract
Given the lack of treatments for diabetic neuropathy (DN), a common diabetic complication, accurate disease models are necessary. Characterization of the leptin-deficient BTBR ob/ob mouse, a type 2 diabetes model, demonstrated that the mice develop robust diabetes coincident with severe neuropathic features, including nerve conduction deficits and intraepidermal nerve fiber loss by 9 and 13 weeks of age, respectively, supporting its use as a DN model. To gain insight into DN mechanisms, we performed microarray analysis on sciatic nerve from BTBR ob/ob mice, identifying 1503 and 642 differentially expressed genes associated with diabetes at 5 and 13 weeks, respectively. Further analyses identified overrepresentation of inflammation and immune-related functions in BTBR ob/ob mice, which interestingly were more highly represented at 5 weeks, an observation that may suggest a contributory role in DN onset. To complement the gene expression analysis, we demonstrated that protein levels of select cytokines were significantly upregulated at 13 weeks in BTBR ob/ob mouse sciatic nerve. Furthermore, we compared our array data to that from an established DN model, the C57BKS db/db mouse, which reflected a common dysregulation of inflammatory and immune-related pathways. Together, our data demonstrate that BTBR ob/ob mice develop rapid and robust DN associated with dysregulated inflammation and immune-related processes.
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Affiliation(s)
- Phillipe D O'Brien
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Junguk Hur
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - John M Hayes
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Carey Backus
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Stacey A Sakowski
- A. Alfred Taubman Medical Research Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Eva L Feldman
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA; A. Alfred Taubman Medical Research Institute, University of Michigan, Ann Arbor, MI 48109, USA.
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