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Gureev AP, Sadovnikova IS, Chernyshova EV, Tsvetkova AD, Babenkova PI, Nesterova VV, Krutskikh EP, Volodina DE, Samoylova NA, Andrianova NV, Silachev DN, Plotnikov EY. Beta-Hydroxybutyrate Mitigates Sensorimotor and Cognitive Impairments in a Photothrombosis-Induced Ischemic Stroke in Mice. Int J Mol Sci 2024; 25:5710. [PMID: 38891898 PMCID: PMC11172083 DOI: 10.3390/ijms25115710] [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: 04/02/2024] [Revised: 05/21/2024] [Accepted: 05/21/2024] [Indexed: 06/21/2024] Open
Abstract
The consequences of stroke include cognitive deficits and sensorimotor disturbances, which are largely related to mitochondrial impairments in the brain. In this work, we have shown that the mimetic of the ketogenic diet beta-hydroxybutyrate (βHB) can improve neurological brain function in stroke. At 3 weeks after photothrombotic stroke, mice receiving βHB with drinking water before and after surgery recovered faster in terms of sensorimotor functions assessed by the string test and static rods and cognitive functions assessed by the Morris water maze. At the same time, the βHB-treated mice had lower expression of some markers of astrocyte activation and inflammation (Gfap, Il-1b, Tnf). We hypothesize that long-term administration of βHB promotes the activation of the nuclear factor erythroid 2-related factor 2/antioxidant response element (Nrf2/ARE) pathway, which leads to increased expression of antioxidant genes targeting mitochondria and genes involved in signaling pathways necessary for the maintenance of synaptic plasticity. βHB partially maintained mitochondrial DNA (mtDNA) integrity during the first days after photothrombosis. However, in the following three weeks, the number of mtDNA damages increased in all experimental groups, which coincided with a decrease in Ogg1 expression, which plays an important role in mtDNA repair. Thus, we can assume that βHB is not only an important metabolite that provides additional energy to brain tissue during recovery from stroke under conditions of mitochondrial damage but also an important signaling molecule that supports neuronal plasticity and reduces neuroinflammation.
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Affiliation(s)
- Artem P. Gureev
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
- Laboratory of Metagenomics and Food Biotechnology, Voronezh State University of Engineering Technology, 394036 Voronezh, Russia
| | - Irina S. Sadovnikova
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Ekaterina V. Chernyshova
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Arina D. Tsvetkova
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Polina I. Babenkova
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Veronika V. Nesterova
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Ekaterina P. Krutskikh
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Daria E. Volodina
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Natalia A. Samoylova
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, 394018 Voronezh, Russia; (A.P.G.)
| | - Nadezda V. Andrianova
- A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Denis N. Silachev
- A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Egor Y. Plotnikov
- A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
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van de Rijt LJM, Feast AR, Vickerstaff V, Sampson EL, Lobbezoo F. Oral function and its association with nutrition and quality of life in nursing home residents with and without dementia: A cross-sectional study. Gerodontology 2021; 38:404-413. [PMID: 33521997 PMCID: PMC9291735 DOI: 10.1111/ger.12535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 12/23/2020] [Accepted: 01/08/2021] [Indexed: 12/11/2022]
Abstract
Background Oral health problems increase with age, and are common in nursing home residents, especially in those with dementia. These problems can lead to tooth loss, diminished oral function and malnutrition. Objectives To compare oral function, nutritional status and quality of life (QoL) between residents with and without dementia, and to examine associations between these variables. Methods Cross‐sectional study conducted in four UK nursing homes. Residents aged 65 + with and without dementia were included. Information was collected on demographics, dental status, quality of swallowing and chewing, xerostomia and orofacial pain. During oral examination, information was collected on number of teeth and occlusal units (OU), and functional categories (eg, OU combined with dentures). Multiple linear regression was used for statistical analysis. Results Of 84 residents with and 27 without dementia participated. Residents with dementia had significantly fewer teeth (Dementia median (IQR) = 14 (6‐21), vs No dementia 22 (12.75‐24.25); P = .021), fewer OU (Dementia median (IQR) = 0 (0‐3), vs No dementia 4 (0‐7); P = .001) and poorer functional categories (Z = −3.283; P = .001), and nutritional status was significantly poorer than those without (Dementia Mean (SD) = 8.3 (2.7), vs No dementia 10.4 (2.0); P = .002). In the regression model, quality of chewing (Coef (95% CI) = −1.27 (−2.22, −0.31); P = .010) was significantly correlated with nutritional status. Conclusion Oral function and nutritional status of residents with dementia was poorer than those without. Almost half of all residents had insufficient oral function, which was negatively associated with QoL and nutritional status.
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Affiliation(s)
- Liza J M van de Rijt
- Department of Orofacial Pain and Dysfunction, Faculty of Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Alexandra R Feast
- Marie Curie Palliative Care Research Department, Division of Psychiatry, University College London, London, UK
| | - Victoria Vickerstaff
- Marie Curie Palliative Care Research Department, Division of Psychiatry, University College London, London, UK.,The Research Department of Primary Care and Population Health, University College London, London, UK
| | - Elizabeth L Sampson
- Marie Curie Palliative Care Research Department, Division of Psychiatry, University College London, London, UK.,Barnet Enfield and Haringey Mental Health Trust Liaison Psychiatry Team, North Middlesex University Hospital, London, UK
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Faculty of Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Wang Z, Lin B, Liu W, Peng H, Song C, Huang J, Li Z, Chen L, Tao J. Electroacupuncture ameliorates learning and memory deficits via hippocampal 5-HT1A receptors and the PKA signaling pathway in rats with ischemic stroke. Metab Brain Dis 2020; 35:549-558. [PMID: 31515682 DOI: 10.1007/s11011-019-00489-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Accepted: 08/28/2019] [Indexed: 12/22/2022]
Abstract
Hippocampal 5-HT1A receptors and the PKA signaling pathway have been implicated in learning and memory. This study aimed to investigate whether PKA signaling mediated by 5-HT1A receptors was involved in the electroacupuncture (EA)-mediated learning and memory in a rat model of middle cerebral artery occlusion-induced cognitive deficit (MICD). Compared to no treatment or non-acupoint EA treatment, EA at DU20 and DU24 acupoints improved the neurological deficit of scores, shortened escape latency and increased the frequency of crossing the platform in the Morris water maze test. T2-weighted imaging demonstrated that the MICD rat brain lesions were mainly located in the cortex and hippocampus, and injured volumes were reduced after EA. Furthermore, we found that these behavioral changes were concomitant with the deficit of the 5HT1A and PKA signaling pathways in the hippocampus, as the activation of the 5-HT1A receptor, the reduction of PKA kinase activity, and AMPA and NMDA receptor phosphorylation occurred in the injured hippocampus at Day 14 after MICD. Additionally, EA dramatically elevated the activation of PKA. Moreover, EA significantly increased intracellular calcium concentrations regulated by the activation of NMDA receptors. Therefore, PKA kinase and NMDA receptors mediated by 5-HT1A receptors in the hippocampus might contribute to improving learning and memory during the recovery process following ischemic stroke with an EA intervention.
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Affiliation(s)
- Zhifu Wang
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Bingbing Lin
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Weilin Liu
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Hongwei Peng
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Changming Song
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Jia Huang
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Zuanfang Li
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Lidian Chen
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Jing Tao
- Fujian University of Traditional Chinese Medicine, Fuzhou, China.
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Shoji I, Kemuriyama T, Tandai-Hiruma M, Maruyama S, Tashiro A, Yokoe H, Nishida Y. Reflex arc of the teeth clenching-induced pressor response in rats. J Physiol Sci 2018; 68:89-100. [PMID: 28035645 PMCID: PMC10717518 DOI: 10.1007/s12576-016-0513-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 12/07/2016] [Indexed: 12/19/2022]
Abstract
Although "teeth clenching" induces pressor response, the reflex tracts of the response are unknown. In this study, dantrolene administration inhibited teeth clenching generated by electrical stimulation of the masseter muscles and completely abolished the pressor response. In addition, trigeminal ganglion block or hexamethonium administration completely abolished the pressor response. Local anesthesia of molar regions significantly reduced the pressor response to 27 ± 10%. Gadolinium (mechanoreceptor blocker of group III muscle afferents) entrapment in masticatory muscles also significantly reduced the pressor response to 62 ± 7%. Although atropine methyl nitrate administration did not change the pressor response, a significant dose-dependent augmentation of heart rate was observed. These results indicate that both periodontal membrane and mechanoreceptors in masticatory muscles are the receptors for the pressor response, and that the afferent and efferent pathways of the pressor response pass through the trigeminal afferent nerves and sympathetic nerves, respectively.
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Affiliation(s)
- Ichiro Shoji
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 3598513, Japan.
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan.
| | - Takehito Kemuriyama
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 3598513, Japan
| | - Megumi Tandai-Hiruma
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 3598513, Japan
| | - Satoshi Maruyama
- Pharmacochemical Section, Aeromedical Laboratory, Japan Air Self Defense Force, Tachikawa, Tokyo, Japan
| | - Akimasa Tashiro
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 3598513, Japan
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Yasuhiro Nishida
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 3598513, Japan
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Mutoh T, Sasaki K, Tatewaki Y, Kunitoki K, Takano Y, Taki Y. Preceding functional tooth loss delays recovery from acute cerebral hypoxia and locomotor hypoactivity after murine subarachnoid haemorrhage. Clin Exp Pharmacol Physiol 2017; 45:344-348. [PMID: 29044603 DOI: 10.1111/1440-1681.12874] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 09/30/2017] [Accepted: 10/03/2017] [Indexed: 01/04/2023]
Abstract
Tooth loss and related changes in the functionality may lead to worse outcome of stroke patients, but the effect on hemorrhagic stroke remains unclear. This study aimed to determine the impact of impaired masticatory function on acute cerebral oxygenation and locomotor activity after experimental subarachnoid haemorrhage (SAH). Twenty C57BL/6 mice with (MC-treated group) or without (control group) prior treatment of cutting off the upper molars were subjected to SAH by endovascular perforation. Grading of SAH and acute cerebral infarction were assessed by MR images. Brain tissue oxygen saturation (SbtO2 ) by photoacoustic imaging and parameters related to locomotor activity by open-field test were analyzed serially after SAH. In all mice, global SbtO2 depression was notable immediately after SAH induction (P <.001), which recovered close to the baseline levels until day 3. However, MC-treated mice demonstrated a prolonged relative cerebral hypoxia (<40% of the baseline SbtO2) as compared to the control (3 ± 1 vs 1 ± 1 days; P <.05). The average distance travelled on day 7 and the ratio of central-area distance/total travelled distance by open-field test between days 7 and 14 were significantly lower in MC-treated mice than in the control mice (P <.05), although the occurrences of new infarction were not statistically different (P >.05). These data suggest a possible link between preceding masticatory impairment and early brain injury to deteriorate neurobehavioural function in patients after SAH.
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Affiliation(s)
- Tatsushi Mutoh
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan
| | - Kazumasu Sasaki
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan
| | - Yasuko Tatewaki
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan
| | - Keiko Kunitoki
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan
| | - Yumi Takano
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan
| | - Yasuyuki Taki
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan
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Hara T, Kawanishi K, Ohno A, Iida S. The evolution of research on occlusion and brain function. J Prosthodont Res 2016; 61:6-8. [PMID: 27354029 DOI: 10.1016/j.jpor.2016.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 05/11/2016] [Accepted: 06/02/2016] [Indexed: 10/21/2022]
Affiliation(s)
- Tetsuya Hara
- Department of Occlusal and Oral Functional Rehabilitation, Okayama University Graduate School, Japan.
| | - Katsuya Kawanishi
- Department of Oral Rehabilitation, Division of Occlusion and Removable Prosthodontics, Health Sciences University of Hokkaido School of Dentistry, Japan
| | - Akinori Ohno
- Division of Prosthodontics & Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University, Japan
| | - Sachiyo Iida
- Department of Occlusion and Removable Prosthodontics, Okayama University Hospital, Japan
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Wang JS, Lee JH, Kim NJ. Effects of neuromuscular electrical stimulation on masticatory muscles in elderly stroke patients. J Phys Ther Sci 2015; 27:2767-70. [PMID: 26504289 PMCID: PMC4616090 DOI: 10.1589/jpts.27.2767] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/03/2015] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study aimed to examine the effects of neuromuscular electrical stimulation on masticatory muscle activation in elderly stroke patients. [Subjects and Methods] The subjects included 20 elderly patients diagnosed with stroke and 10 healthy elderly individuals. The neuromuscular electrical stimulation group received stimulation on the masseter muscle in the affected side for 30 min each day, 3 times per week for 8 weeks. In all the subjects, surface electromyography was used to measure activity of the masseter and temporal muscles in both sides under resting and clenching conditions. [Results] In the neuromuscular electrical stimulation group, after the intervention, an increase in the activity of all of the masticatory muscles was observed during clenching, with a significant increase in the activity of the masseter muscle in the affected side. Significant differences between the groups were not observed after the interventions. [Conclusion] The results of this study suggest that application of neuromuscular electrical stimulation effectively improves muscle activity in elderly stroke patients during clenching, and that this technique can be applied particularly for the improvement of the clenching activity of the masseter muscle in the affected side.
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Affiliation(s)
- Joong-San Wang
- Department of Physical Therapy, Yeoju Institute of Technology, Republic of Korea
| | - Ju-Hwan Lee
- Department of Physical Therapy, Faculty of Medical and Health, Pohang College, Republic of Korea
| | - Nyeon-Jun Kim
- Department of Physical Therapy, Yongin University, Republic of Korea
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Yang LC, Guo H, Zhou H, Suo DQ, Li WJ, Zhou Y, Zhao Y, Yang WS, Jin X. Chronic oleoylethanolamide treatment improves spatial cognitive deficits through enhancing hippocampal neurogenesis after transient focal cerebral ischemia. Biochem Pharmacol 2015; 94:270-81. [PMID: 25748831 DOI: 10.1016/j.bcp.2015.02.012] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/24/2015] [Indexed: 11/28/2022]
Abstract
Oleoylethanolamide (OEA) has been shown to have neuroprotective effects after acute cerebral ischemic injury. The aim of this study was to investigate the effects of chronic OEA treatment on ischemia-induced spatial cognitive impairments, electrophysiology behavior and hippocampal neurogenesis. Daily treatments of 30 mg/kg OEA significantly ameliorated spatial cognitive deficits and attenuated the inhibition of long-term potentiation (LTP) in the middle cerebral artery occlusion (MCAO) rat model. Moreover, OEA administration improved cognitive function in a manner associated with enhanced neurogenesis in the hippocampus. Further study demonstrated that treatment with OEA markedly increased the expressions of brain-derived neurotrophic factor (BDNF) and peroxisome proliferator-activated receptors α (PPARα). Our data suggest that chronic OEA treatment can exert functional recovery of cognitive impairments and neuroprotective effects against cerebral ischemic insult in rats via triggering of neurogenesis in the hippocampus, which supports the therapeutic use of OEA for cerebral ischemia.
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Affiliation(s)
- Li-Chao Yang
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Han Guo
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Hao Zhou
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Da-Qin Suo
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Wen-Jun Li
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Yu Zhou
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Yun Zhao
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China
| | - Wu-Shuang Yang
- Department of Neurosurgery, Xiamen Traditional Chinese Medicine Hospital, Xiamen 361005, China
| | - Xin Jin
- Xiamen Key Laboratory of Chiral Drugs, Medical College, Xiamen University, Xiang'an District, Xiamen 361102, China.
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How masticatory function and periodontal disease relate to senile dementia. JAPANESE DENTAL SCIENCE REVIEW 2015. [DOI: 10.1016/j.jdsr.2014.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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Ström JO, Ingberg E, Theodorsson A, Theodorsson E. Method parameters' impact on mortality and variability in rat stroke experiments: a meta-analysis. BMC Neurosci 2013; 14:41. [PMID: 23548160 PMCID: PMC3637133 DOI: 10.1186/1471-2202-14-41] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 03/22/2013] [Indexed: 12/14/2022] Open
Abstract
Background Even though more than 600 stroke treatments have been shown effective in preclinical studies, clinically proven treatment alternatives for cerebral infarction remain scarce. Amongst the reasons for the discrepancy may be methodological shortcomings, such as high mortality and outcome variability, in the preclinical studies. A common approach in animal stroke experiments is that A) focal cerebral ischemia is inflicted, B) some type of treatment is administered and C) the infarct sizes are assessed. However, within this paradigm, the researcher has to make numerous methodological decisions, including choosing rat strain and type of surgical procedure. Even though a few studies have attempted to address the questions experimentally, a lack of consensus regarding the optimal methodology remains. Methods We therefore meta-analyzed data from 502 control groups described in 346 articles to find out how rat strain, procedure for causing focal cerebral ischemia and the type of filament coating affected mortality and infarct size variability. Results The Wistar strain and intraluminal filament procedure using a silicone coated filament was found optimal in lowering infarct size variability. The direct and endothelin methods rendered lower mortality rate, whereas the embolus method increased it compared to the filament method. Conclusions The current article provides means for researchers to adjust their middle cerebral artery occlusion (MCAo) protocols to minimize infarct size variability and mortality.
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Affiliation(s)
- Jakob O Ström
- Department of Clinical and Experimental Medicine, Clinical Chemistry, Faculty of Health Sciences, Linköping University, County Council of Östergötland, Linköping, Sweden.
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Bingham D, Martin SJ, Macrae IM, Carswell HVO. Watermaze performance after middle cerebral artery occlusion in the rat: the role of sensorimotor versus memory impairments. J Cereb Blood Flow Metab 2012; 32:989-99. [PMID: 22373646 PMCID: PMC3367220 DOI: 10.1038/jcbfm.2012.16] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In rodent stroke models, investigation of deficits in spatial memory using the Morris watermaze may be confounded by coexisting sensory or motor impairments. To target memory specifically, we devised a watermaze protocol to minimize the impact of sensory and motor impairments in female Lister-hooded rats exposed to proximal electrocoagulation of the middle cerebral artery (MCAO). Rats were trained in a reference-memory task comprising 4 trials/day; trial 1 being a probe trial (platform absent for the first 60 seconds). Training ended once animals reached a strict criterion based on the probe-trial performance. Memory retention was tested 1, 7, and 28 days later. The MCAO did not affect the number of days to reach criterion during acquisition or the time spent in target quadrant during retention testing, compared with sham or unoperated rats. However, MCAO rats showed slightly poorer accuracy in crossing the platform location and increased thigmotactic swimming compared with controls. Our results show that spatial memory deficits are minimal in this rodent stroke model, and suggest that previously published watermaze impairments are attributable to sensory and motor deficits but not memory deficits. We recommend using probe trials and training to a predetermined performance criterion in future studies assessing watermaze memory deficits in rodent stroke models.
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Affiliation(s)
- Deborah Bingham
- Department of Neurosurgery, San Francisco Veterans Affairs Medical Center, San Francisco, California, USA
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Okamoto N. Effect of occlusal support by implant prostheses on brain function. J Prosthodont Res 2011; 55:206-13. [DOI: 10.1016/j.jpor.2011.01.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 01/08/2011] [Accepted: 01/18/2011] [Indexed: 11/28/2022]
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Hirai T, Kang Y, Koshino H, Kawanishi K, Toyoshita Y, Ikeda Y, Saito M. Occlusal-masticatory function and learning and memory: Immunohistochemical, biochemical, behavioral and electrophysiological studies in rats. JAPANESE DENTAL SCIENCE REVIEW 2010. [DOI: 10.1016/j.jdsr.2009.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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