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Francis T, Leri F. Role of dopamine D1 receptor in the modulation of memory consolidation by passive and self-administered heroin and associated conditioned stimuli. Sci Rep 2023; 13:12614. [PMID: 37537211 PMCID: PMC10400648 DOI: 10.1038/s41598-023-39380-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 07/25/2023] [Indexed: 08/05/2023] Open
Abstract
It has been proposed that opiates modulate memory consolidation, but recent work has indicated that this effect may be mediated by how the drug is experienced (i.e., passive injections vs. self-administration). Because the dopamine (DA) D1 receptor is involved in processing of learning signals and attribution of salience to events experienced by an organism, two studies in male Sprague-Dawley rats tested the effect of blocking this receptor on modulation of memory consolidation by passive and self-administered heroin, in addition to conditioned memory modulation by heroin-paired cues. Using the object location memory task, Study 1 employed SCH23390 (0, 0.05, 0.10 mg/kg, SC) to modulate enhancement of memory consolidation induced by post-training injections of heroin (1 mg/kg, SC) as well as by exposure to the environment paired with heroin injections (6 pairings, 1 h each, 1 mg/kg). Study 2 was conducted in rats that could self-administer heroin (0.05 mg/kg/infusion, IV) and tested whether SCH23390 (0 and 0.1 mg/kg, SC) could prevent memory modulation induced by a change in schedule of self-administration (from fixed to variable ratio). It was found that while repeated passive injections of heroin retained their enhancing effect on memory, when self-administered, heroin enhanced consolidation of object location memory only at the beginning of self-administration and after a change in schedule. Importantly, SCH23390 blocked memory modulation by heroin when passively administered and when the drug was self-administered on a novel schedule. SCH23390 also blocked conditioned memory modulation induced by post-training exposure to heroin-paired cues. Taken together, these results suggest that modulation of memory consolidation by unconditioned and conditioned opiate reinforcers involve a D1-dependent mechanism of salience attribution linked to the anticipation of drug effects.
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Affiliation(s)
- Travis Francis
- Department of Psychology and Collaborative Program in Neuroscience, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Francesco Leri
- Department of Psychology and Collaborative Program in Neuroscience, University of Guelph, Guelph, ON, N1G 2W1, Canada.
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The Neuroprotective Effect of Mesna on Cisplatin-Induced Neurotoxicity: Behavioral, Electrophysiological, and Molecular Studies. Neurotox Res 2020; 39:826-840. [PMID: 33216283 DOI: 10.1007/s12640-020-00315-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 11/07/2020] [Accepted: 11/15/2020] [Indexed: 02/07/2023]
Abstract
Peripheral neuropathy and cognitive impairments following cisplatin administration may interfere with the clinical usage of the drug. Mesna is a chemoprotective agent with anti-inflammatory and anti-oxidant effects. Our study aimed to investigate the protective effects of mesna against cisplatin-induced neurotoxicity. Neurotoxicity was induced by the administration of 2.5 mg/kg cisplatin twice a week for four consecutive weeks in male Wistar rats. The neuroprotective effect of mesna (150 mg/kg/day) was evaluated through behavioral, electrophysiological, and molecular studies. Cisplatin treatment caused passive avoidance memory impairment, increased anxiety-like behaviors, altered thermal sensitivity, and decreased muscle strength in a grip strength test. Our electrophysiological studies indicated that administration of cisplatin induced peripheral sensory neuropathy and decreased the amplitudes of the compound action potential of sensory nerves. Cisplatin administration increased MDA and 4-HNE levels and decreased anti-oxidant (SOD and GPx) enzymes. Proinflammatory cytokines (IL-1β and TNF-α) and metalloproteinase-2 and 9 (MMP-2/9) were increased by cisplatin treatment. Morphological alterations were observed in the dorsal root ganglion (DRG) of cisplatin-treated rats. Cognitive impairments, anxiety, muscle strength, and thermal sensitivity changes induced by cisplatin were improved with mesna treatment. The reduced conduction velocity in sensory nerves was recovered in the cisplatin + mesna group. Mesna partially alleviated redox imbalance, reduced the proinflammatory cytokines, and MMP-2/9 levels. Mesna administration also relieved the morphological changes in DRG of cisplatin-treated rats. In conclusion, our results revealed that mesna can alleviate cisplatin-induced central and peripheral nervous system toxicity. These results support the concept that chemotherapy-induced neuropathy can be partially inhibited via mesna.
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Perez EC, Bravo DR, Rodgers SP, Khan AR, Leasure JL. Shaping the adult brain with exercise during development: Emerging evidence and knowledge gaps. Int J Dev Neurosci 2019; 78:147-155. [PMID: 31229526 PMCID: PMC6824985 DOI: 10.1016/j.ijdevneu.2019.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 06/12/2019] [Accepted: 06/19/2019] [Indexed: 02/07/2023] Open
Abstract
Exercise is known to produce a myriad of positive effects on the brain, including increased glia, neurons, blood vessels, white matter and dendritic complexity. Such effects are associated with enhanced cognition and stress resilience in humans and animal models. As such, exercise represents a positive experience with tremendous potential to influence brain development and shape an adult brain capable of responding to life's challenges. Although substantial evidence attests to the benefits of exercise for cognition in children and adolescents, the vast majority of existing studies examine acute effects. Nonetheless, there is emerging evidence indicating that exercise during development has positive cognitive and neural effects that last to adulthood. There is, therefore, a compelling need for studies designed to determine the extent to which plasticity driven by developmental exercise translates into enhanced brain health and function in adulthood and the underlying mechanisms. Such studies are particularly important given that modern Western society is increasingly characterized by sedentary behavior, and we know little about how this impacts the brain's developmental trajectory. This review synthesizes current literature and outlines significant knowledge gaps that must be filled in order to elucidate what exercise (or lack of exercise) during development contributes to the health and function of the adult brain.
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Affiliation(s)
- Emma C Perez
- Department of Psychology, University of Houston, Houston, TX, 77204-5022, United States
| | - Diana R Bravo
- Department of Psychology, University of Houston, Houston, TX, 77204-5022, United States
| | - Shaefali P Rodgers
- Department of Psychology, University of Houston, Houston, TX, 77204-5022, United States
| | - Ali R Khan
- Department of Biology & Biochemistry, University of Houston, Houston, TX, 77204-5022, United States
| | - J Leigh Leasure
- Department of Psychology, University of Houston, Houston, TX, 77204-5022, United States
- Department of Biology & Biochemistry, University of Houston, Houston, TX, 77204-5022, United States
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Rajizadeh MA, Esmaeilpour K, Masoumi-Ardakani Y, Bejeshk MA, Shabani M, Nakhaee N, Ranjbar MP, Borzadaran FM, Sheibani V. Voluntary exercise impact on cognitive impairments in sleep-deprived intact female rats. Physiol Behav 2018; 188:58-66. [DOI: 10.1016/j.physbeh.2017.12.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/06/2017] [Accepted: 12/23/2017] [Indexed: 10/18/2022]
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Babaei P, Shirkouhi SG, Hosseini R, Soltani Tehrani B. Vitamin D is associated with metabotropic but not neurotrophic effects of exercise in ovariectomized rats. Diabetol Metab Syndr 2017; 9:91. [PMID: 29177013 PMCID: PMC5688735 DOI: 10.1186/s13098-017-0288-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 11/01/2017] [Indexed: 01/13/2023] Open
Abstract
PURPOSE Here, we studied the beneficial effects of aerobic exercise on metabolic syndrome components, cognitive performance, brain derived neurotrophic factor (BDNF) and irisin in ovariectomized rats with different serum vitamin D (Vit D) status. METHODS Eighty female wistar rats were divided into 2 groups of sham operated (sham, n = 8), and ovariectomized (OVX, n = 72). Then OVX were divided into 9 groups of receiving combination of exercise protocol with low dose of Vit D (OVX + EXE + LD), high dose of Vit D (OVX + EXE + HD), Vit D deficiency (OVX + EXE - D), and (OVX + EXE + Veh). Also non exercised groups of OVX receiving high dose of Vit D (OVX + HD), low dose of Vit D (OVX + LD), Vit D deficiency (OVX - D), and Veh (OVX + Veh) were included. After 2 months of related interventions, spatial memory was assessed using Morris water maze (MWM), and then metabolic syndrome components were measured. RESULTS High dose of Vit D supplementation showed significant reduction in weight (p = 0.001), lipid profiles (p = 0.001), visceral fat (p = 0.001) and waist circumference (p = 0.001) regardless of exercising or not, with no change in cognitiive function. Serum BDNF level was significantly higher in Vit D deficient group (p = 0.001), and was decreased in the OVX + HD. In contrary, irisin did not show any significant relationship with serum concentration of Vit D, while it was significantly elevated in the exercised groups compared with non-exercised counterparts. CONCLUSION Vit D insufficiency deteriorates metabolic syndrome components, and elevates serum BDNF as a compensatory metabotropic factor, and further supplementation significantly attenuates these components parallel with reduction in BDNF. In addition, aerobic exercise successfully induces various metabolic benefits, provided optimum serum level of Vit D.
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Affiliation(s)
- Parvin Babaei
- Cellular & Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, 2263 Iran
- Department of Physiology, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
- Neuroscience Research Center, Guilan University of Medical Sciences, Rasht, Iran
| | - Samaneh Ghorbani Shirkouhi
- Cellular & Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, 2263 Iran
- Department of Physiology, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Rastegar Hosseini
- Department of Physical Education and Sport Sciences, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Bahram Soltani Tehrani
- Cellular & Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, 2263 Iran
- Department of Pharmacology, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
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Hajizade Ghonsulakandi S, Sheikh M, Dehghan Shasaltaneh M, Chopani S, Naghdi N. The Association Between Effective Dose of Magnesium and Mild Compulsive Exercise on Spatial Learning, Memory, and Motor Activity of Adult Male Rats. Biol Trace Elem Res 2017; 178:235-245. [PMID: 28124215 DOI: 10.1007/s12011-016-0916-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 12/14/2016] [Indexed: 12/17/2022]
Abstract
One of the most important survival mechanisms is learning and memory processes. To emphasize the role of physical exercises and magnesium (Mg) in improvement of cognitive performance, we planned to investigate the effect of Mg and mild compulsive exercise on spatial learning and memory of adult male rats. Accordingly, we divided male Wistar rats into four groups: (I) control, (II) Mg treatment, (III) exercise, and (IV) Mg-exercise in the different dosages of Mg (0.5, 1, 1.5, and 2 mmol/kbw) were injected in the form of gavage during 1 week. Also, 1-week mild running on treadmill was used for exercise treatment. The Morris water maze (MWM) test and open field tool were used to evaluate spatial learning, memory, and motor activity, respectively. Our results clearly showed that 1 mmol/kbw Mg was applied as an effective dosage. Strikingly, 1-week mild exercise on treadmill had no significant effect on spatial motor activity, learning, and memory. Feeding 1 mmol/kbw Mg for a week showed a significant difference in learning and exploration stages. Compared to control animals, these results reveal exercise and Mg simultaneously had effect on learning and reminding. As a consequence, although mild exercise had no effect on motor activity and memory, Mg intake improved spatial learning, memory, and locomotor activity. The Mg feeding could be a promising supplemental treatment in the neurodegenerative disease. It is worthwhile to mention consumption of Mg leads to enhancement of memory, so animals find the hidden platform with the highest velocity.
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Affiliation(s)
| | - Mahmuod Sheikh
- Department of Physical Education, Sport Faculty, University of Tehran, Tehran, Iran
| | - Marzieh Dehghan Shasaltaneh
- Laboratory of Neuro-organic Chemistry, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Samira Chopani
- Physiology and Pharmacology Department, Pasteur Institute of Iran, Tehran, Iran
| | - Nasser Naghdi
- Physiology and Pharmacology Department, Pasteur Institute of Iran, Tehran, Iran.
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Exercise Prevents Memory Impairment Induced by Arsenic Exposure in Mice: Implication of Hippocampal BDNF and CREB. PLoS One 2015; 10:e0137810. [PMID: 26368803 PMCID: PMC4569337 DOI: 10.1371/journal.pone.0137810] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 08/20/2015] [Indexed: 11/19/2022] Open
Abstract
High concentrations of arsenic, which can be occasionally found in drinking water, have been recognized as a global health problem. Exposure to arsenic can disrupt spatial memory; however, the underlying mechanism remains unclear. In the present study, we tested whether exercise could interfere with the effect of arsenic exposure on the long-term memory (LTM) of object recognition in mice. Arsenic (0, 1, 3, and 10 mg/ kg, i.g.) was administered daily for 12 weeks. We found that arsenic at dosages of 1, 3, and 10 mg/kg decreased body weight and increased the arsenic content in the brain. The object recognition LTM (tested 24 h after training) was disrupted by 3 mg/ kg and 10 mg/ kg, but not 1 mg/ kg arsenic exposure. Swimming exercise also prevented LTM impairment induced by 3 mg/ kg, but not with 10 mg/ kg, of arsenic exposure. The expression of brain-derived neurotrophic factor (BDNF) and phosphorylated cAMP-response element binding protein (pCREB) in the CA1 and dentate gyrus areas (DG) of the dorsal hippocampus were decreased by 3 mg/ kg and 10 mg/ kg, but not by 1 mg/ kg, of arsenic exposure. The decrease in BDNF and pCREB in the CA1 and DG induced by 3 mg/ kg, but not 10 mg/ kg, of arsenic exposure were prevented by swimming exercise. Arsenic exposure did not affect the total CREB expression in the CA1 or DG. Taken together, these results indicated that swimming exercise prevented the impairment of object recognition LTM induced by arsenic exposure, which may be mediated by BDNF and CREB in the dorsal hippocampus.
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Exercise improves learning and memory impairments in sleep deprived female rats. Physiol Behav 2015; 138:285-91. [DOI: 10.1016/j.physbeh.2014.10.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 06/30/2014] [Accepted: 10/09/2014] [Indexed: 01/19/2023]
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Saadati H, Sheibani V, Esmaeili-Mahani S, Hajali V, Mazhari S. Prior regular exercise prevents synaptic plasticity impairment in sleep deprived female rats. Brain Res Bull 2014; 108:100-5. [DOI: 10.1016/j.brainresbull.2014.09.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 09/17/2014] [Accepted: 09/18/2014] [Indexed: 12/30/2022]
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