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Rani A, Bean L, Budamagunta V, Kumar A, Foster TC. Failure of senolytic treatment to prevent cognitive decline in a female rodent model of aging. Front Aging Neurosci 2024; 16:1384554. [PMID: 38813533 PMCID: PMC11133672 DOI: 10.3389/fnagi.2024.1384554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 05/01/2024] [Indexed: 05/31/2024] Open
Abstract
There are sex differences in vulnerability and resilience to the stressors of aging and subsequent age-related cognitive decline. Cellular senescence occurs as a response to damaging or stress-inducing stimuli. The response includes a state of irreversible growth arrest, the development of a senescence-associated secretory phenotype, and the release of pro-inflammatory cytokines associated with aging and age-related diseases. Senolytics are compounds designed to eliminate senescent cells. Our recent work indicates that senolytic treatment preserves cognitive function in aging male F344 rats. The current study examined the effect of senolytic treatment on cognitive function in aging female rats. Female F344 rats (12 months) were treated with dasatinib (1.2 mg/kg) + quercetin (12 mg/kg) or ABT-263 (12 mg/kg) or vehicle for 7 months. Examination of the estrus cycle indicated that females had undergone estropause during treatment. Senolytic treatment may have increased sex differences in behavioral stress responsivity, particularly for the initial training on the cued version of the watermaze. However, pre-training on the cue task reduced stress responsivity for subsequent spatial training and all groups learned the spatial discrimination. In contrast to preserved memory observed in senolytic-treated males, all older females exhibited impaired episodic memory relative to young (6-month) females. We suggest that the senolytic treatment may not have been able to compensate for the loss of estradiol, which can act on aging mechanisms for anxiety and memory independent of cellular senescence.
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Affiliation(s)
- Asha Rani
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
| | - Linda Bean
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
| | - Vivekananda Budamagunta
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
- Genetics and Genomics Graduate Program, Genetics Institute, University of Florida, Gainesville, FL, United States
- Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL, United States
| | - Ashok Kumar
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
| | - Thomas C. Foster
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
- Genetics and Genomics Graduate Program, Genetics Institute, University of Florida, Gainesville, FL, United States
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Tan B, Yaşar A, Boz F, Dursun N, Süer C. Sex-related differences in somatic plasticity and possible role of ERK1/2: An in-vivo study of young-adult rats. Physiol Behav 2022; 255:113939. [PMID: 35961608 DOI: 10.1016/j.physbeh.2022.113939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 07/29/2022] [Accepted: 08/08/2022] [Indexed: 11/19/2022]
Abstract
The present study investigates sex differences in hippocampal functions in the context of synaptic plasticity, which is the cellular basis of learning and memory, and differences in the mitogen-activated protein kinase (MAPK) pathway that accompanies plasticity in young-adult rats. The long-term potentiation (LTP) and long-term depression (LTD) were induced by stimulating the perforant pathway (PP) and field potentials composed of the field excitatory post-synaptic potential (fEPSP) and population spike (PS) were recorded from the dentate gyrus (DG). Following the completion of the electrophysiological recordings, the hippocampi were removed bilaterally, and the protein and gene expression levels of the extracellular signal-regulated kinase 1/2 (ERK1/2), c-Jun N-terminal kinase (JNK) and P38-MAPK were determined by Western blot analysis and real-time PCR, respectively. No significant difference was found in synaptic and neuronal function before (basal) and after high-frequency stimulation between male and female rats. Nevertheless, female, but not male, rats were able to express long term depression at the PP - DG synapses, suggesting that sex differences in plasticity are stimulation paradigm specific. MAPK1 expression was higher in males and MAPK3 expression was higher in females, but these differences disappeared after induction of plasticity in both sexes. While the expression of MAPK8 is influenced by sex, independent of the induction of plasticity, MAPK14 expression was down regulated by plasticity induction in females, but not males. No effect of sex, HFS and LFS on total and phosphorylated levels of MAPKs was found except phosphorylated ERK1/2. Phosphorylation of ERK1/2 was up regulated after LFS in male rats but did not change in female rats. These findings indicate that LFS-induced plasticity is differentially modulated between sexes, probably as a result of increased activation of ERK1/2 in male rats.
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Affiliation(s)
- Burak Tan
- Faculty of Medicine, Department of Physiology, Erciyes University, Kayseri, Turkey.
| | - Aslınur Yaşar
- Faculty of Medicine, Department of Physiology, Erciyes University, Kayseri, Turkey.
| | - Fatma Boz
- Faculty of Medicine, Department of Physiology, Erciyes University, Kayseri, Turkey.
| | - Nurcan Dursun
- Faculty of Medicine, Department of Physiology, Erciyes University, Kayseri, Turkey.
| | - Cem Süer
- Faculty of Medicine, Department of Physiology, Erciyes University, Kayseri, Turkey.
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Safari S, Ahmadi N, Mohammadkhani R, Ghahremani R, Khajvand-Abedeni M, Shahidi S, Komaki A, Salehi I, Karimi SA. Sex differences in spatial learning and memory and hippocampal long-term potentiation at perforant pathway-dentate gyrus (PP-DG) synapses in Wistar rats. BEHAVIORAL AND BRAIN FUNCTIONS : BBF 2021; 17:9. [PMID: 34724971 PMCID: PMC8559395 DOI: 10.1186/s12993-021-00184-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 10/24/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Recent studies show that gender may have a significant impact on brain functions. However, the reports of sex effects on spatial ability and synaptic plasticity in rodents are divergent and controversial. Here spatial learning and memory was measured in male and female rats by using Morris water maze (MWM) task. Moreover, to assess sex difference in hippocampal synaptic plasticity we examined hippocampal long-term potentiation (LTP) at perforant pathway-dentate gyrus (PP-DG) synapses. RESULTS In MWM task, male rats outperformed female rats, as they had significantly shorter swim distance and escape latency to find the hidden platform during training days. During spatial reference memory test, female rats spent less time and traveled less distance in the target zone. Male rats also had larger LTP at PP-DG synapses, which was evident in the high magnitude of population spike (PS) potentiation and the field excitatory post synaptic potentials (fEPSP) slope. CONCLUSIONS Taken together, our results suggest that sex differences in the LTP at PP-DG synapses, possibly contribute to the observed sex difference in spatial learning and memory.
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Affiliation(s)
- Samaneh Safari
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Nesa Ahmadi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | - Reza Ghahremani
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Birjand, Birjand, Iran
| | | | - Siamak Shahidi
- 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, Shahid Fahmideh Street, 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, Shahid Fahmideh Street, Hamadan, Iran
| | - Iraj Salehi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - 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, Shahid Fahmideh Street, Hamadan, Iran.
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El Marzouki H, Aboussaleh Y, Najimi M, Chigr F, Ahami A. Effect of Cold Stress on Neurobehavioral and Physiological Parameters in Rats. Front Physiol 2021; 12:660124. [PMID: 34603068 PMCID: PMC8485037 DOI: 10.3389/fphys.2021.660124] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 08/16/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: Cold stress is an important current issue and implementing control strategies to limit its sometimes harmful effects is crucial. Cold is a common stressor that can occur in our work and our occupational or leisure time activities every day. There are substantial studies on the effects of chronic stress on memory and behavior, although, the cognitive changes and anxiety disorders that can occur after exposure to chronic intermittent cold stress are not completely characterized. Therefore, the present study was undertaken with an aim to investigate the effects of chronic intermittent cold stress on body weight, food intake and working memory, and to elucidate cold stress related anxiety disorders using cognitive and behavioral test batteries. Methods: We generated a cold stress model by exposing rats to chronic intermittent cold stress for 5 consecutive days and in order to test for the potential presence of sex differences, a comparable number of male and female rats were tested in the current study. Then, we measured the body weights, food intake and the adrenal glands weight. Working memory and recognition memory were assessed using the Y maze and the Novel Object Recognition (NOR) tasks. While, sex differences in the effects of chronic stress on behavior were evaluated by the elevated plus maze (EPM), open field maze (OF), and Marble burying (MB) tests. Results: We found that 2 h exposure to cold (4°C) resulted in an increase in the relative weight of the adrenal glands in male rats. Given the same chronic stress 5 days of cold exposure (2 h per day), increased weight gain in male rats, while females showed decreased food intake and no change in body weight. Both sexes successfully performed the Y maze and object recognition (OR) tasks, indicating intact spatial working memory performance and object recognition abilities in both male and female rats. In addition, we have shown that stress caused an increase in the level of anxiety in male rats. In contrast, the behavior of the female rats was not affected by cold exposure. Conclusion: Overall, the current results provide preliminary evidence that chronic intermittent cold stress model may not be an efficient stressor to female rats. Females exhibit resilience to cold exposure that causes an increase in the level of anxiety in male rats, which demonstrates that they are affected differently by stress and the gender is an important consideration in experimental design.
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Affiliation(s)
- Hajar El Marzouki
- Biology and Health Laboratory, Unit of Clinical and Cognitive-Behavioural Neurosciences and Applied Nutrition Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Youssef Aboussaleh
- Biology and Health Laboratory, Unit of Clinical and Cognitive-Behavioural Neurosciences and Applied Nutrition Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Mohamed Najimi
- Biological Engineering Laboratory, Faculty of Sciences and Techniques, Sultan MoulaySlimane University, Beni Mellal, Morocco
| | - Fatiha Chigr
- Biological Engineering Laboratory, Faculty of Sciences and Techniques, Sultan MoulaySlimane University, Beni Mellal, Morocco
| | - Ahmed Ahami
- Biology and Health Laboratory, Unit of Clinical and Cognitive-Behavioural Neurosciences and Applied Nutrition Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
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Rojas-Carvajal M, Sequeira-Cordero A, Brenes JC. The environmental enrichment model revisited: A translatable paradigm to study the stress of our modern lifestyle. Eur J Neurosci 2021; 55:2359-2392. [PMID: 33638921 DOI: 10.1111/ejn.15160] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/31/2021] [Accepted: 02/14/2021] [Indexed: 01/31/2023]
Abstract
Mounting evidence shows that physical activity, social interaction and sensorimotor stimulation provided by environmental enrichment (EE) exert several neurobehavioural effects traditionally interpreted as enhancements relative to standard housing (SH) conditions. However, this evidence rather indicates that SH induces many deficits, which could be ameliorated by exposing animals to an environment vaguely mimicking some features of their wild habitat. Rearing rodents in social isolation (SI) can aggravate such deficits, which can be restored by SH or EE. It is not surprising, therefore, that most preclinical stress models have included severe and unnatural stressors to produce a stress response prominent enough to be distinguishable from SH or SI-frequently used as control groups. Although current stress models induce a stress-related phenotype, they may fail to represent the stress of our urban lifestyle characterized by SI, poor housing and working environments, sedentarism, obesity and limited access to recreational activities and exercise. In the following review, we discuss the stress of living in urban areas and how exposures to and performing activities in green environments are stress relievers. Based on the commonalities between human and animal EE, we discuss how models of housing conditions (e.g., SI-SH-EE) could be adapted to study the stress of our modern lifestyle. The housing conditions model might be easy to implement and replicate leading to more translational results. It may also contribute to accomplishing some ethical commitments by promoting the refinement of procedures to model stress, diminishing animal suffering, enhancing animal welfare and eventually reducing the number of experimental animals needed.
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Affiliation(s)
- Mijail Rojas-Carvajal
- Instituto de Investigaciones Psicológicas, Universidad de Costa Rica, San Pedro, Costa Rica.,Centro de Investigación en Neurociencias, Universidad de Costa Rica, San Pedro, Costa Rica
| | - Andrey Sequeira-Cordero
- Centro de Investigación en Neurociencias, Universidad de Costa Rica, San Pedro, Costa Rica.,Instituto de Investigaciones en Salud, Universidad de Costa Rica, San Pedro, Costa Rica
| | - Juan C Brenes
- Instituto de Investigaciones Psicológicas, Universidad de Costa Rica, San Pedro, Costa Rica.,Centro de Investigación en Neurociencias, Universidad de Costa Rica, San Pedro, Costa Rica
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Kim JW, Han KR, Kim W, Jung HY, Nam SM, Yoo DY, Hwang IK, Seong JK, Yoon YS. Adult Hippocampal Neurogenesis Can Be Enhanced by Cold Challenge Independently From Beigeing Effects. Front Neurosci 2019; 13:92. [PMID: 30890905 PMCID: PMC6411820 DOI: 10.3389/fnins.2019.00092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 01/25/2019] [Indexed: 12/24/2022] Open
Abstract
In this study, we investigated the effects of cold challenge on adult hippocampal neurogenesis (AHN) and hippocampal gene expression and whether these are mediated by beigeing of peripheral fat tissues. Cold challenge (6 ± 2°C) for 1 and 4 weeks was found to induce beigeing effects in inguinal white adipose tissue based on hematoxylin and eosin staining as well as uncoupled protein-1 immunohistochemical staining. In the hippocampus, cold challenge for 1 or 4 weeks increased dentate gyrus neurogenesis and expression of genes related to AHN, including notch signaling, G protein-coupled receptor signaling, and adrenergic beta receptor-1. However, this enhancement of neurogenesis and gene expression by cold challenge was not shown by administration of CL 316,243, which induces peripheral beigeing similar to cold challenge but does not cross the blood-brain barrier. These results suggest that cold challenge promotes AHN and central expression of AHN-related, signaling, and β1-adrenergic receptors genes, and that peripheral beigeing by itself is not sufficient to mediate these effects. Considering the increase in AHN and gene expression changes, cold challenge may offer a novel approach to hippocampal modulation.
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Affiliation(s)
- Jong Whi Kim
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Kyu Ri Han
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Woosuk Kim
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Hyo Young Jung
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Sung Min Nam
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, Seoul, South Korea
| | - Dae Young Yoo
- Department of Anatomy, College of Medicine, Soonchunhyang University, Asan, South Korea
| | - In Koo Hwang
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
- Korea Mouse Phenotyping Center, Seoul National University, Seoul, South Korea
| | - Je Kyung Seong
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
- Korea Mouse Phenotyping Center, Seoul National University, Seoul, South Korea
| | - Yeo Sung Yoon
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
- Korea Mouse Phenotyping Center, Seoul National University, Seoul, South Korea
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Vandal M, White PJ, Tournissac M, Tremblay C, St-Amour I, Drouin-Ouellet J, Bousquet M, Traversy MT, Planel E, Marette A, Calon F. Impaired thermoregulation and beneficial effects of thermoneutrality in the 3×Tg-AD model of Alzheimer's disease. Neurobiol Aging 2016; 43:47-57. [PMID: 27255814 DOI: 10.1016/j.neurobiolaging.2016.03.024] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Revised: 03/21/2016] [Accepted: 03/22/2016] [Indexed: 10/22/2022]
Abstract
The sharp rise in the incidence of Alzheimer's disease (AD) at an old age coincides with a reduction in energy metabolism and core body temperature. We found that the triple-transgenic mouse model of AD (3×Tg-AD) spontaneously develops a lower basal body temperature and is more vulnerable to a cold environment compared with age-matched controls. This was despite higher nonshivering thermogenic activity, as evidenced by brown adipose tissue norepinephrine content and uncoupling protein 1 expression. A 24-hour exposure to cold (4 °C) aggravated key neuropathologic markers of AD such as: tau phosphorylation, soluble amyloid beta concentrations, and synaptic protein loss in the cortex of 3×Tg-AD mice. Strikingly, raising the body temperature of aged 3×Tg-AD mice via exposure to a thermoneutral environment improved memory function and reduced amyloid and synaptic pathologies within a week. Our results suggest the presence of a vicious cycle between impaired thermoregulation and AD-like neuropathology, and it is proposed that correcting thermoregulatory deficits might be therapeutic in AD.
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Affiliation(s)
- Milene Vandal
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada
| | - Philip J White
- Sarah W. Stedman Nutrition and Metabolism Center and Duke Molecular Physiology Institute, Duke University Medical Center, NC, USA; Faculté de medicine, Université Laval, Québec, Québec, Canada; Institut universitaire de pneumologie et de cardiologie de Québec, Québec, Québec, Canada
| | - Marine Tournissac
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada
| | - Cyntia Tremblay
- Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada
| | - Isabelle St-Amour
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Département de Recherche et Développement, Héma-Québec, Québec, Québec, Canada
| | - Janelle Drouin-Ouellet
- Faculté de medicine, Université Laval, Québec, Québec, Canada; John van Geest Centre for Brain Repair, University of Cambridge, Cambridge, UK
| | - Melanie Bousquet
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada
| | - Marie-Thérèse Traversy
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada
| | - Emmanuel Planel
- Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Faculté de medicine, Université Laval, Québec, Québec, Canada
| | - Andre Marette
- Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada; Faculté de medicine, Université Laval, Québec, Québec, Canada; Institut universitaire de pneumologie et de cardiologie de Québec, Québec, Québec, Canada
| | - Frederic Calon
- Faculté de pharmacie, Université Laval, Québec, Québec, Canada; Axe Neurosciences, Centre de recherche du CHU-Q (Pavillon CHUL), Québec, Québec, Canada; Institut sur la nutrition et les aliments fonctionnels, Université Laval, Québec, Québec, Canada.
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Karamian R, Komaki A, Salehi I, Tahmasebi L, Komaki H, Shahidi S, Sarihi A. Vitamin C reverses lead-induced deficits in hippocampal synaptic plasticity in rats. Brain Res Bull 2015; 116:7-15. [DOI: 10.1016/j.brainresbull.2015.05.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 04/11/2015] [Accepted: 05/08/2015] [Indexed: 12/11/2022]
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