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Kazi JA, Zatilfarihiah R. Gabapentin completely neutralized the acute morphine activation in the rat hypothalamus: a c-Fos study. FUTURE NEUROLOGY 2019. [DOI: 10.2217/fnl-2018-0037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: The molecular mechanism of gabapentin (GBP)–morphine combinational function and its neuro-anatomical sites of action to prevent, to neutralize morphine side effects and also the enhancement its analgesic effect of morphine is unknown. Methods: Morphine (10 mg/kg), saline, co-injection: GBP (150 mg/kg) with morphine (10 mg/kg) were injected by intraperitoneal injection in rats under deep anaesthesia. C-Fos immunohistochemistry technique was used to locate c-Fos expression in rat hypothalamus. Results: Gabapentin in combination with morphine significantly (p < 0.01) attenuated the acute morphine induced c-Fos immunoreactive neuron in hypothalamus. Conclusion: GBP neutralized the morphine sensitization in rat hypothalamus. GBP might neuromodulate and or antagonize the receptor regulatory machinery of morphine sensitization circuit which might work for drug discovery of morphine abuse.
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Affiliation(s)
- Jamil Ahsan Kazi
- Universiti Teknologi MARA (UiTM), Faculty of Dentistry, Centre of Studies for Preclinical Science, Jalan Hospital, 47000 SUNGAI BULOH, Selangor, Malaysia
| | - Rasdi Zatilfarihiah
- Universiti Teknologi MARA (UiTM), Faculty of Dentistry, Centre of Studies for Preclinical Science, Jalan Hospital, 47000 SUNGAI BULOH, Selangor, Malaysia
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Zhang S, Paul J, Nantha-Aree M, Buckley N, Shahzad U, Cheng J, DeBeer J, Winemaker M, Wismer D, Punthakee D, Avram V, Thabane L. Reanalysis of morphine consumption from two randomized controlled trials of gabapentin using longitudinal statistical methods. J Pain Res 2015; 8:79-85. [PMID: 25709496 PMCID: PMC4332293 DOI: 10.2147/jpr.s56558] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background Postoperative pain management in total joint replacement surgery remains ineffective in up to 50% of patients and has an overwhelming impact in terms of patient well-being and health care burden. We present here an empirical analysis of two randomized controlled trials assessing whether addition of gabapentin to a multimodal perioperative analgesia regimen can reduce morphine consumption or improve analgesia for patients following total joint arthroplasty (the MOBILE trials). Methods Morphine consumption, measured for four time periods in patients undergoing total hip or total knee arthroplasty, was analyzed using a linear mixed-effects model to provide a longitudinal estimate of the treatment effect. Repeated-measures analysis of variance and generalized estimating equations were used in a sensitivity analysis to compare the robustness of the methods. Results There was no statistically significant difference in morphine consumption between the treatment group and a control group (mean effect size estimate 1.0, 95% confidence interval −4.7, 6.7, P=0.73). The results remained robust across different longitudinal methods. Conclusion The results of the current reanalysis of morphine consumption align with those of the MOBILE trials. Gabapentin did not significantly reduce morphine consumption in patients undergoing major replacement surgeries. The results remain consistent across longitudinal methods. More work in the area of postoperative pain is required to provide adequate management for this patient population.
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Affiliation(s)
- Shiyuan Zhang
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada
| | - James Paul
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
| | | | - Norman Buckley
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
| | - Uswa Shahzad
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
| | - Ji Cheng
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
| | - Justin DeBeer
- Department of Surgery, Division of Orthopaedics, McMaster University, Hamilton, ON, Canada
| | - Mitchell Winemaker
- Department of Surgery, Division of Orthopaedics, McMaster University, Hamilton, ON, Canada
| | - David Wismer
- Department of Surgery, Division of Orthopaedics, McMaster University, Hamilton, ON, Canada
| | - Dinshaw Punthakee
- Department of Surgery, Division of Orthopaedics, McMaster University, Hamilton, ON, Canada
| | - Victoria Avram
- Department of Surgery, Division of Orthopaedics, McMaster University, Hamilton, ON, Canada
| | - Lehana Thabane
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada ; Department of Anesthesia, McMaster University, Hamilton, ON, Canada ; Biostatistics Unit/Centre for Evaluation of Medicines, St Joseph's Healthcare-Hamilton, Hamilton, ON, Canada ; Population Health Research Institute, Hamilton Health Science/McMaster University, Hamilton, ON, Canada
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Abstract
This paper is the thirtieth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2007 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd.,Flushing, NY 11367, United States.
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