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Ranjbar K, Komaki A, Fayazi B, Zarrinkalam E. Coenzyme Q10 and exercise training reinstate middle cerebral artery occlusion-induced behavioral deficits and hippocampal long-term potentiation suppression in aging rats. Psychopharmacology (Berl) 2024; 241:1577-1594. [PMID: 38627309 DOI: 10.1007/s00213-024-06583-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 03/29/2024] [Indexed: 06/15/2024]
Abstract
RATIONAL Patients experience post-stroke cognitive impairment during aging. To date, no specific treatment solution has been reported for this disorder. OBJECTIVE The purpose of this study was to evaluate the effects of exercise training and coenzyme Q10 supplementation on middle cerebral artery occlusion (MCAO) induced behavioral impairment, long-term potentiation inhibition and cerebral infarction size in aging rats. METHODS Fifty aging male rats underwent MCAO surgery and were randomly distributed in to the following groups: 1-Sham, 2- control, 3- Coenzyme Q10, 4- Exercise training and 5- Exercise training with Q10 supplementation (Ex + Q10). Aerobic training groups were allowed to run on a treadmill for 12 weeks. Q10 (50 mg/kg) was administered intragastrically by gavage. Morris water maze, shuttle box and elevated plus maze tests were used to evaluate cognitive function. The population spike (PS) amplitude and slope of excitatory postsynaptic potentials (EPSP) in the dentate gyrus area were recorded as a result of perforant pathway electrical stimulation. RESULTS Our study showed that Q10 and aerobic training alone ameliorate spatial memory in the acquisition phase, but have no effect on spatial memory in the retention phase. Q10 and exercise training synergistically promoted spatial memory in the retention phase. Q10 and exercise training separately and simultaneously mitigated cerebral ischemia-induced passive avoidance memory impairment in acquisition and retention phases. The EPSP did not differ between the groups, but exercise training and Q10 ameliorate the PS amplitude in hippocampal responses to perforant path stimulation. Exercising and Q10 simultaneously reduced the cerebral infarction volume. CONCLUSION Collectively, the findings of the present study imply that 12 weeks of aerobic training and Q10 supplementation alone can simultaneously reverse cerebral ischemia induced neurobehavioral deficits via amelioration of synaptic plasticity and a reduction in cerebral infarction volume in senescent rats.
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Affiliation(s)
- Kamal Ranjbar
- Department of Physical Education and Sport Science, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran.
| | - Alireza Komaki
- Neurophysiology Research Center, Hamedan University of Medical Sciences, Hamedan, Iran
| | - Bayan Fayazi
- Department of Physical Education and Sport Science, Razi University, Kermanshah, Iran
| | - Ebrahim Zarrinkalam
- Department of Physical Education and Sport Science, Hamedan Branch, Islamic Azad University, Hamedan, Iran.
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Kazemi S, Safari S, Komaki S, Karimi SA, Golipoor Z, Komaki A. The effects of carvacrol and p-cymene on Aβ 1-42 -induced long-term potentiation deficit in male rats. CNS Neurosci Ther 2024; 30:e14459. [PMID: 37727020 PMCID: PMC10916422 DOI: 10.1111/cns.14459] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 08/04/2023] [Accepted: 08/25/2023] [Indexed: 09/21/2023] Open
Abstract
AIMS Alzheimer's disease (AD) is the most common type of dementia in which oxidative stress plays an important role. In this disease, learning and memory and the cellular mechanism associated with it, long-term potentiation (LTP), are impaired. Considering the beneficial effects of carvacrol (CAR) and p-cymene against AD, their effect was assessed on in vivo hippocampal LTP in the perforant pathway (PP)-dentate gyrus (DG) pathway in an Aβ1-42 -induced rat model of AD. METHODS Male Wistar rats were randomly assigned to five groups: sham: intracerebroventricular (ICV) injection of phosphate-buffered saline, Aβ: ICV Aβ1-42 injections, Aβ + CAR (50 mg/kg), Aβ + p-cymene (50 mg/kg), and Aβ + CAR + p-cymene. Administration of CAR and p-cymene was done by gavage daily 4 weeks before and 4 weeks after the Aβ injection. The population spike (PS) amplitude and field excitatory postsynaptic potentials (fEPSP) slope were determined in DG against the applied stimulation to the PP. RESULTS Aβ-treated rats exhibited impaired LTP induction in the PP-DG synapses, resulting in significant reduction in both fEPSP slope and PS amplitude compared to the sham animals. Aβ-treated rats consumed either CAR or p-cymene separately (but not their combination), and showed an enhancement in fEPSP slope and PS amplitude of the DG granular cells. CONCLUSIONS These data indicate that CAR or p-cymene can ameliorate Aβ-associated changes in synaptic plasticity. Surprisingly, the combination of CAR and p-cymene did not yield the same effect, suggesting a potential interaction between the two substances.
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Affiliation(s)
- Sahifeh Kazemi
- Department of Neuroscience, School of Science and Advanced Technologies in MedicineHamadan University of Medical SciencesHamadanIran
| | - Samaneh Safari
- Department of Neuroscience, School of Science and Advanced Technologies in MedicineHamadan University of Medical SciencesHamadanIran
- Student Research CommitteeHamadan University of Medical SciencesHamadanIran
| | - Somayeh Komaki
- Department of Physiology, School of MedicineHamadan University of Medical SciencesHamadanIran
| | - Seyed Asaad Karimi
- Department of Neuroscience, School of Science and Advanced Technologies in MedicineHamadan University of Medical SciencesHamadanIran
- Department of Physiology, School of MedicineHamadan University of Medical SciencesHamadanIran
| | - Zoleikha Golipoor
- Cellular and Molecular Research Center, Faculty of MedicineGuilan University of Medical SciencesRashtIran
| | - Alireza Komaki
- Department of Neuroscience, School of Science and Advanced Technologies in MedicineHamadan University of Medical SciencesHamadanIran
- Department of Physiology, School of MedicineHamadan University of Medical SciencesHamadanIran
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Effectiveness of coenzyme Q10 on learning and memory and synaptic plasticity impairment in an aged Aβ-induced rat model of Alzheimer's disease: a behavioral, biochemical, and electrophysiological study. Psychopharmacology (Berl) 2023; 240:951-967. [PMID: 36811650 DOI: 10.1007/s00213-023-06338-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/06/2023] [Indexed: 02/24/2023]
Abstract
RATIONALE Aging is the major risk factor for Alzheimer's disease (AD), and cognitive and memory impairments are common among the elderly. Interestingly, coenzyme Q10 (Q10) levels decline in the brain of aging animals. Q10 is a substantial antioxidant substance, which has an important role in the mitochondria. OBJECTIVE We assessed the possible effects of Q10 on learning and memory and synaptic plasticity in aged β-amyloid (Aβ)-induced AD rats. METHODS In this study, 40 Wistar rats (24-36 months old; 360-450 g) were randomly assigned to four groups (n = 10 rats/group)-group I: control, group II: Aβ, group III: Q10; 50 mg/kg, and group IV: Q10+Aβ. Q10 was administered orally by gavage daily for 4 weeks before the Aβ injection. The cognitive function and learning and memory of the rats were measured by the novel object recognition (NOR), Morris water maze (MWM), and passive avoidance learning (PAL) tests. Finally, malondialdehyde (MDA), total antioxidant capacity (TAC), total thiol group (TTG), and total oxidant status (TOS) were measured. RESULTS Q10 improved the Aβ-related decrease in the discrimination index in the NOR test, spatial learning and memory in the MWM test, passive avoidance learning and memory in the PAL test, and long-term potentiation (LTP) impairment in the hippocampal PP-DG pathway in aged rats. In addition, Aβ injection significantly increased serum MDA and TOS levels. Q10, however, significantly reversed these parameters and also increased TAC and TTG levels in the Aβ+Q10 group. CONCLUSIONS Our experimental findings suggest that Q10 supplementation can suppress the progression of neurodegeneration that otherwise impairs learning and memory and reduces synaptic plasticity in our experimental animals. Therefore, similar supplemental Q10 treatment given to humans with AD could possibly provide them a better quality of life.
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Interaction effects of intracerebroventricular injection of crocin with the α2-adrenoceptors on memory deficit and hippocampal synaptic plasticity following chronic pain in rat. Brain Res Bull 2022; 190:168-178. [DOI: 10.1016/j.brainresbull.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 09/15/2022] [Accepted: 10/06/2022] [Indexed: 11/21/2022]
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The Role of Acetylcholine on the Effects of Different Doses of Sulfite in Learning and Memory. Neurochem Res 2022; 47:3331-3343. [PMID: 35895153 DOI: 10.1007/s11064-022-03684-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/07/2022] [Accepted: 07/11/2022] [Indexed: 10/16/2022]
Abstract
In this study, the effects of different doses of sulfite on learning, memory, and long term potentiation as well as the relationship of these effects with acetylcholine pathways, Arc and synapsin 1 levels were investigated. Sixty male Wistar albino rats were randomly divided into three groups as control, S100, and S260. Sodiummetabisulfite (S100;100 mg/kg/day, S260;260 mg/kg/day) was given by oral administration. Behavioral changes were evaluated. After long term potentiation recordings from the perforant pathway-dentate gyrus synapses, animals were sacrificed. Acetylcholinesterase activity, choline acetyltransferase activity, acetylcholine level as well as Arc and Synapsin 1 expressions were analyzed on the hippocampi. The total distance and average velocity values in the open field and Morris water maze tests increased in the sulfite groups, while the discrimination index in the novel object recognition test decreased compared to controls. Acetylcholine levels and choline acetyltransferase activity were also increased in the sulfite groups, while acetylcholinesterase activity was decreased compared to controls. Sulfite intake attenuated long term potentiation in the hippocampus. It has been observed that the excitatory postsynaptic potential slope and population spike amplitude of the field potentials obtained in sulfite groups decreased. This impairment was accompanied by a decrease in Arc and synapsin 1 expressions. In conclusion, it has been shown that sulfite intake in adults impairs learning and memory, possibly mediated by the cholinergic pathway. It is considered that the decrement in Arc and synapsin expressions may play a role in the mechanism underlying the impairment in long term potentiation caused by toxicity.
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Ergin KN, Karakaya S, Göger G, Sytar O, Demirci B, Duman H. Anatomical and Phytochemical Characteristics of Different Parts of Hypericum scabrum L. Extracts, Essential Oils, and Their Antimicrobial Potential. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27041228. [PMID: 35209017 PMCID: PMC8875214 DOI: 10.3390/molecules27041228] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/08/2022] [Accepted: 02/09/2022] [Indexed: 11/18/2022]
Abstract
Hypericum (Hypericaceae) is a genus that comprises a high number of species around the world. In this study, the roots, aerial parts, flowers, fruits, and aerial parts with flowers from Hypericum scabrum were macerated separately by methanol and water and then fractionated by different solvents of, such as ethyl acetate, n-hexane, butanol, dichloromethane, aqueous residue sub-extracts, and ethnobotanical use. All the extracts, sub-extracts and essential oils of H. scabrum were investigated for the first time in detail for their antimicrobial, total phenolics, and antioxidant activities. Anatomical structures of the root, stem, leaf, upper and lower leaf surface, stamen, sepal, and petal of H. scabrum were examined. The biochemical layout of essential oils was determined by GC and GC/MS. The antioxidant activity was determined by free radical scavenging activity (by DPPH). Antimicrobial activity was applied against Candida albicans ATCC 10231, Escherichia coli ATCC 8739, Staphylococcus aureus ATCC 6538, Bacillus subtilis ATCC 19659, and C. tropicalis ATCC 750 using microdilution methods. The essentials of the aerial parts, flower, and fruit are characterized by the presence of monoterpene hydrocarbons, whereas roots oil include alkanes. The GC-FID and GC-MS analysis showed that major components of roots, aerial parts, flowers, and fruits oils were undecane (66.1%); α-pinene (17.5%), γ-terpinene (17.4%), and α-thujene (16.9%); α-pinene (55.6%), α-thujene (10.9%), and γ-terpinene (7.7%); α-pinene (85.2%), respectively. The aerial part sub-extracts indicated a greater level of total phenolics and antioxidant potential. The n-hexane sub-extracts (from aerial part, flower, and aerial part with flower) showed the best activity against B. subtilis, with 39.06 µg/mL MIC value. The presented research work indicates that H. scabrum can be a novel promising resource of natural antioxidant and antimicrobial compounds.
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Affiliation(s)
- Kubra Nalkiran Ergin
- Department Pharmacognosy, Faculty of Pharmacy, Ataturk University, Erzurum 25240, Turkey;
| | - Songul Karakaya
- Department Pharmaceutical Botany, Faculty of Pharmacy, Ataturk University, Erzurum 25240, Turkey
- Correspondence: (S.K.); (O.S.)
| | - Gamze Göger
- Department Pharmacognosy, Faculty of Pharmacy, Trakya University, Edirne 22030, Turkey;
| | - Oksana Sytar
- Institute of Plant and Environmental Sciences, Slovak Agricultural University in Nitra, 94976 Nitra, Slovakia
- Correspondence: (S.K.); (O.S.)
| | - Betul Demirci
- Department Pharmacognosy, Faculty of Pharmacy, Anadolu University, Eskisehir 26210, Turkey;
| | - Hayri Duman
- Department of Biology, Faculty of Science, Gazi University, Ankara 06560, Turkey;
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Tan B, Dursun N, Süer C. Comparison of the subsequent LTP in hippocampal synapses primed by low frequency stimulations ranging from 0.5 to 5 Hz: An in vivo study. Neurosci Lett 2022; 767:136311. [PMID: 34743896 DOI: 10.1016/j.neulet.2021.136311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 10/22/2021] [Accepted: 10/23/2021] [Indexed: 11/29/2022]
Abstract
According to the Bienenstock,Cooper, andMunro's (BCM) model, the level of afferent activity regulates the point of crossover from long-term depression (LTD) to long-term potentiation (LTP) of the active synapses. Although experimental results from the hippocampus and visual cortex have supported the BCM theory, it remains unclear whether previous activity of synapses regulates the output of neuron populations in vivo, as expected from the theory. In the present study, we studied the effects of priming stimulations at different frequencies (LFS, 0.5, 1, 2 and 5 Hz) on the magnitude of LTP at synaptic and somatic levels in the dentate gyrus of hippocampal formation. LTP in the dentate gyrus (DG) of LFS-primed or unprimed hippocampal formation was induced by delivering of tetanic stimulation to the perforant pathway (PP) in anesthetized rats. The field excitatory postsynaptic potential (fEPSP) slope and the population spike (PS) amplitude were evaluated to measure the magnitude of LTP. 1 Hz- and 5 Hz- (not 0.5 Hz and 2 Hz) stimulation of the PP led to an early LTD of fEPSP. The LTP of fEPSP was completely inhibited by previously delivering 0.5 Hz and 2 Hz LFS, but instead converted to LTD by 1 Hz LFS. However, none of the frequencies used was able to inhibit the LTP of PS. These results suggest that temporal dynamics which are critical to determine the direction of synaptic plasticity has no impact on the plasticity of neuronal output. We concluded that it is needed to explain why neuronal output does not behave within the framework of the BCM theory.
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Affiliation(s)
- Burak Tan
- Erciyes University, School of Medicine, Department of Physiology, Kayseri, Turkey.
| | - Nurcan Dursun
- Erciyes University, School of Medicine, Department of Physiology, Kayseri, Turkey
| | - Cem Süer
- Erciyes University, School of Medicine, Department of Physiology, Kayseri, Turkey
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Karimi SA, Komaki S, Taheri M, Omidi G, Kourosh-Arami M, Salehi I, Komaki A. Effects of the hydroalcoholic extract of Rosa damascena on hippocampal long-term potentiation in rats fed high-fat diet. J Physiol Sci 2021; 71:14. [PMID: 33926383 PMCID: PMC10717342 DOI: 10.1186/s12576-021-00797-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 03/29/2021] [Indexed: 02/07/2023]
Abstract
High-fat diets (HFDs) and obesity can cause serious health problems, such as neurodegenerative diseases and cognitive impairments. Consumption of HFD is associated with reduction in hippocampal synaptic plasticity. Rosa damascena (R. damascena) is traditionally used as a dietary supplement for many disorders. This study was carried out to determine the beneficial effect of hydroalcoholic extract of R. damascena on in vivo hippocampal synaptic plasticity (long-term potentiation, LTP) in the perforant pathway (PP)-dentate gyrus (DG) pathway in rats fed with an HFD. Male Wistar rats were randomly assigned to four groups: Control, R. damascena extract (1 g/kg bw daily for 30 days), HFD (for 90 days) and HFD + extract. The population spike (PS) amplitude and slope of excitatory post-synaptic potentials (EPSP) were measured in DG area in response to stimulation applied to the PP. Serum oxidative stress biomarkers [total thiol group (TTG) and superoxide dismutase (SOD)] were measured. The results showed the HFD impaired LTP induction in the PP-DG synapses. This conclusion is supported by decreased EPSP slope and PS amplitude of LTP. R. damascena supplementation in HFD animals enhanced EPSP slope and PS amplitude of LTP in the granular cell of DG. Consumption of HFD decreased TTG and SOD. R. damascena extract consumption in the HFD animals enhanced TTG and SOD. These data indicate that R. damascena dietary supplementation can ameliorate HFD-induced alteration of synaptic plasticity, probably through its significant antioxidant effects and activate signalling pathways, which are critical in controlling synaptic plasticity.
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Affiliation(s)
- Seyed Asaad Karimi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
- Department of Neuroscience, School of Science and Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Somayeh Komaki
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Masoumeh Taheri
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ghazaleh Omidi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Masoumeh Kourosh-Arami
- Department of Neuroscience, School of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
- Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Iraj Salehi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Komaki
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
- Department of Neuroscience, School of Science and Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
- Department of Physiology, School of Medicine, Hamadan University of Medical Sciences, Shahid Fahmideh Street, 65178/518, Hamadan, Iran.
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