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Nguyen HT, Le XT, Van Nguyen T, Phung HN, Pham HTN, Nguyen KM, Matsumoto K. Ursolic acid and its isomer oleanolic acid are responsible for the anti-dementia effects of Ocimum sanctum in olfactory bulbectomized mice. J Nat Med 2022; 76:621-633. [PMID: 35218459 DOI: 10.1007/s11418-022-01609-2] [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: 12/11/2021] [Accepted: 02/15/2022] [Indexed: 11/30/2022]
Abstract
This study aims to clarify the bioactive constituents responsible for the anti-dementia effects of Ocimum sanctum Linn. ethanolic extract (OS) using olfactory bulbectomized (OBX) mice, an animal model of dementia. The effects of OS or its extract further fractionated with n-hexane (OS-H), ethyl acetate (OS-E), and n-butanol (OS-B) on the spatial cognitive deficits of OBX mice were elucidated by the modified Y-maze tests. The effects of the major constituents of the most active OS fraction were also elucidated using the reference drug donepezil. The administration of OS and OS-E ameliorated the spatial cognitive deficits caused by OBX, whereas OS-H or OS-B had no effect. Two major constituents, ursolic acid (URO) and oleanolic acid (OLE), and three minor constituents were isolated from OS-E. URO (6 and 12 mg/kg) and OLE (24 mg/kg) attenuated the OBX-induced cognitive deficits. URO (6 mg/kg) and donepezil reversed the OBX-induced down-regulation of vascular endothelial growth factor (VEGF) and choline acetyltransferase expression levels in the hippocampus. URO inhibited the ex vivo activity of acetylcholinesterase with similar efficacy to donepezil. URO inhibited the in vitro activity of acetylcholinesterase (IC50 = 106.5 μM), while the effects of OS, OS-E, and other isolated compounds were negligible. These findings suggest that URO and OLE are responsible for the anti-dementia action of OS extract, whereas URO possesses a more potent anti-dementia effect than its isomer OLE. The effects of URO are, at least in part, mediated by normalizing the function of central cholinergic systems and VEGF protein expression.
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Affiliation(s)
- Hien Thu Nguyen
- Department of Pharmacology and Biochemistry, National Institute of Medicinal Materials, Hanoi, 10000, Vietnam
| | - Xoan Thi Le
- Department of Pharmacology and Biochemistry, National Institute of Medicinal Materials, Hanoi, 10000, Vietnam.
| | - Tai Van Nguyen
- Department of Phytochemistry, National Institute of Medicinal Materials, Hanoi, 10000, Vietnam
| | - Hoa Nhu Phung
- Department of Phytochemistry, National Institute of Medicinal Materials, Hanoi, 10000, Vietnam
| | - Hang Thi Nguyet Pham
- Department of Pharmacology and Biochemistry, National Institute of Medicinal Materials, Hanoi, 10000, Vietnam
| | - Khoi Minh Nguyen
- Department of Phytochemistry, National Institute of Medicinal Materials, Hanoi, 10000, Vietnam
| | - Kinzo Matsumoto
- Graduate School of Pharmaceutical Sciences, Daiichi University of Pharmacy, Fukuoka, 815-8511, Japan
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2
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Ocimum sanctum Linn. Extract Improves Cognitive Deficits in Olfactory Bulbectomized Mice via the Enhancement of Central Cholinergic Systems and VEGF Expression. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6627648. [PMID: 34306149 PMCID: PMC8266455 DOI: 10.1155/2021/6627648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 06/19/2021] [Indexed: 01/17/2023]
Abstract
This study aimed to clarify the antidementia effects of ethanolic extract of Ocimum sanctum Linn. (OS) and its underlying mechanisms using olfactory bulbectomized (OBX) mice. OBX mice were treated daily with OS or a reference drug, donepezil (DNP). Spatial and nonspatial working memory performance was measured using a modified Y maze test and a novel object recognition test, respectively. Brain tissues of the animals were subjected to histochemical and neurochemical analysis. OS treatment attenuated OBX-induced impairment of spatial and nonspatial working memories. OBX induced degeneration of septal cholinergic neurons, enlargement of the lateral ventricles, and suppression of hippocampal neurogenesis. OS and DNP treatment also depressed these histological damages. OS administration reduced ex vivo activity of acetylcholinesterase in the brain. OBX diminished the expression levels of genes coding vascular endothelial growth factor (VEGF) and VEGF receptor type 2 (VEGFR2). Treatment with OS and DNP reversed OBX-induced decrease in VEGF gene and protein expression levels without affecting the expression of the VEGFR2 gene. These results demonstrate that the administration of OS can lessen the cognitive deficits and neurohistological damages of OBX and that these actions are, at least in part, mediated by the enhancement of central cholinergic systems and VEGF expression.
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3
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Neurochemical changes underlying cognitive impairment in olfactory bulbectomized rats and the impact of the mGlu 5-positive allosteric modulator CDPPB. Brain Res 2021; 1768:147577. [PMID: 34217728 DOI: 10.1016/j.brainres.2021.147577] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/17/2021] [Accepted: 06/28/2021] [Indexed: 11/23/2022]
Abstract
The olfactory bulbectomized (OBX) rat model is a well-established model of depression in which antidepressant drugs reverse deficits in the passive avoidance test 14 days after administration. Recently, the olfactory bulbectomized rat model has been proposed to be a model of Alzheimer's disease (AD), and the available data indicate similarities between the changes that typically occur in AD and those observed in OBX animals. In the present study, the occurrence of neurochemical impairments related to AD were investigated 8 months after OB ablation. The expression of the nitric oxide synthases eNOS and nNOS, receptor for advanced glycation endproducts (RAGEs) and dimethylarginine dimethylaminohydrolase (DDAH1) in the prefrontal cortices (PFCs), hippocampi and striata of olfactory bulbectomized and sham-operated rats was evaluated. Subsequently, the impact of the administration of a positive allosteric modulator of the mGlu5 receptor, CDPPB (14 days, 2.5 or 5 mg/kg), on OBX-related changes was assessed. OB ablation induced typical deficits in passive avoidance. Significant aberrations in the expression of both isoforms of NOS were observed in the hippocampus and striatum, and the expression of DDAH1 was increased in the PFCs of OBX animals. CDPPB at a dose of 5 mg/kg ameliorated cognitive impairment in the passive avoidance test and partially reversed the changes in eNOS and nNOS expression induced by the lesion. The results of this study confirm that some of the neurochemical changes observed in OBX animals may resemble those associated with AD pathology and that activation of the mGlu5 receptor may partially counteract these pathological alterations.
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4
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Avetisyan A, Balasanyants S, Simonyan R, Koroev D, Kamynina A, Zinovkin R, Bobkova N, Volpina O. Synthetic fragment (60-76) of RAGE improves brain mitochondria function in olfactory bulbectomized mice. Neurochem Int 2020; 140:104799. [PMID: 32783973 DOI: 10.1016/j.neuint.2020.104799] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 06/26/2020] [Accepted: 06/30/2020] [Indexed: 11/17/2022]
Abstract
The receptor for advanced glycation end products (RAGE) is considered to contribute to the pathogenesis of Alzheimer's disease (AD), mediating amyloid beta (Aβ) accumulation, mitochondrial damage, and neuroinflammation. Previously, we have synthesized small peptides corresponding to the fragments (60-76) (P1) and (60-62) (P2) of the RAGE extracellular domain, and have shown that administration of P1 fragment but not P2 results in restoration of the spatial memory and decreases the brain Aβ (1-40) level in olfactory bulbectomized (OBX) mice demonstrating main features of Alzheimer's type neurodegeneration. In the present study, we have investigated the supposed mechanism of the therapeutic efficacy of P1 RAGE fragment and compared it to P2 short fragment. We have found that P1 restored activities of the respiratory chain in the Complexes I and IV in both cortical and hippocampal mitochondria of the OBX mice while P2 had no effect. Besides, fluorescein-labeled analog Flu-P1 bound to Aβ (1-40) and Aβ (1-42) with high affinity (Kd in the nanomolar range) whereas Flu-P2 revealed low affinity with tenfold higher Kd value for Aβ (1-40) and did not bind to Aβ (1-42). However, neither of the peptides had a notable impact on inflammation, estimated as mRNA expression of proinflammatory cytokines in the brain tissues of OBX mice. Taken together, our results suggest that direct Aβ-P1 interaction is one of the molecular events mediating the protection of the mitochondria in OBX animals from Aβ toxic effect. The RAGE fragment P1 would be the soluble decoy for Aβs and serve as a promising therapeutic agent against neurodegeneration accompanied by mitochondrial dysfunction.
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Affiliation(s)
- Armine Avetisyan
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
| | - Samson Balasanyants
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the RAS, Moscow, Russia
| | - Ruben Simonyan
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Dmitriy Koroev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the RAS, Moscow, Russia
| | - Anna Kamynina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the RAS, Moscow, Russia; Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
| | - Roman Zinovkin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia; Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Natalia Bobkova
- Institute of Cell Biophysics RAS, Moscow Region, Pushchino, Russia
| | - Olga Volpina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the RAS, Moscow, Russia
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5
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Vorobyov V, Medvinskaya N, Deev A, Sengpiel F, Bobkova N, Lunin S. Spatial memory deficits initiated by agroclavine injection or olfactory bulbectomy in rats are characterized by different levels of long-term potentiation expression in the hippocampus. Int J Neurosci 2020; 130:1225-1229. [PMID: 32072845 DOI: 10.1080/00207454.2020.1732963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Aim: To clarify whether long-term potentiation (LTP) is the mechanism underpinning mnemonic processes. Mathrials and methods: We studied LTP in hippocampal slices from rats whose spatial memory deficit was produced by either olfactory bulbectomy (OBX) or pretreatment with an ergot alkaloid, agroclavine. OBX is accompanied by cholinergic system inhibition whereas agroclavine predominantly activates dopaminergic mediation. The both have been shown to be involved in learning/memory and LTP mechanisms.Results: In OBX- vs. sham-operated rat, we have revealed significant reduction of LTP in hippocampal CA1 region. In contrast, no LTP differences in agroclavine- vs. vehicle-treated rats were observed. Conclusions: These results demonstrate that LTP expression in the hippocampus is dependent on the origin of spatial memory impairment. Furthermore, they suggest that pharmacological and neurodegenerative models of AD might be useful approach for discovery of both AD mechanisms and mixed pathology dementias.
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Affiliation(s)
- Vasily Vorobyov
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Natalia Medvinskaya
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Alexander Deev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Frank Sengpiel
- School of Biosciences and Neuroscience & Mental Health Research Institute, Cardiff University, Museum Avenue, Cardiff, UK
| | - Natalia Bobkova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Sergey Lunin
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
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6
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Rajkumar R, Dawe GS. OBscure but not OBsolete: Perturbations of the frontal cortex in common between rodent olfactory bulbectomy model and major depression. J Chem Neuroanat 2018; 91:63-100. [DOI: 10.1016/j.jchemneu.2018.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 03/02/2018] [Accepted: 04/04/2018] [Indexed: 02/08/2023]
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7
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Bobkova NV, Novikov VV, Medvinskaya NI, Aleksandrova IY, Nesterova IV, Fesenko EE. Effect of weak combined static and extremely low-frequency alternating magnetic fields on spatial memory and brain amyloid-β in two animal models of Alzheimer's disease. Electromagn Biol Med 2018; 37:127-137. [PMID: 29771571 DOI: 10.1080/15368378.2018.1471700] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Subchronic effect of a weak combined magnetic field (MF), produced by superimposing a constant component, 42 µT and an alternating MF of 0.08 µT, which was the sum of two frequencies of 4.38 and 4.88 Hz, was studied in olfactory bulbectomized (OBE) and transgenic Tg (APPswe, PSEN1) mice, which were used as animal models of sporadic and heritable Alzheimer's disease (AD) accordingly. Spatial memory was tested in a Morris water maze on the following day after completion of training trials with the hidden platform removed. The amyloid-β (Aβ) level was determined in extracts of the cortex and hippocampus of mice using a specific DOT analysis while the number and dimensions of amyloid plaques were detected after their staining with thioflavin S in transgenic animals. Exposure to the MFs (4 h/day for 10 days) induced the decrease of Aβ level in brain of OBE mice and reduced the number of Aβ plaques in the cortex and hippocampus of Tg animals. However, memory improvement was revealed in Tg mice only, but not in the OBE animals. Here, we suggest that in order to prevent the Aβ accumulation, MFs could be used at early stage of neuronal degeneration in case of AD and other diseases with amyloid protein deposition in other tissues.
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Affiliation(s)
- Natalia V Bobkova
- a Institute of Cell Biophysics , Russian Academy of Sciences , Pushchino , Moscow Region , Russia
| | - Vadim V Novikov
- a Institute of Cell Biophysics , Russian Academy of Sciences , Pushchino , Moscow Region , Russia
| | - Natalia I Medvinskaya
- a Institute of Cell Biophysics , Russian Academy of Sciences , Pushchino , Moscow Region , Russia
| | - Irina Y Aleksandrova
- a Institute of Cell Biophysics , Russian Academy of Sciences , Pushchino , Moscow Region , Russia
| | - Inna V Nesterova
- a Institute of Cell Biophysics , Russian Academy of Sciences , Pushchino , Moscow Region , Russia
| | - Eugenii E Fesenko
- a Institute of Cell Biophysics , Russian Academy of Sciences , Pushchino , Moscow Region , Russia
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8
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Michels L, Muthuraman M, Anwar AR, Kollias S, Leh SE, Riese F, Unschuld PG, Siniatchkin M, Gietl AF, Hock C. Changes of Functional and Directed Resting-State Connectivity Are Associated with Neuronal Oscillations, ApoE Genotype and Amyloid Deposition in Mild Cognitive Impairment. Front Aging Neurosci 2017; 9:304. [PMID: 29081745 PMCID: PMC5646353 DOI: 10.3389/fnagi.2017.00304] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 09/04/2017] [Indexed: 01/03/2023] Open
Abstract
The assessment of effects associated with cognitive impairment using electroencephalography (EEG) power mapping allows the visualization of frequency-band specific local changes in oscillatory activity. In contrast, measures of coherence and dynamic source synchronization allow for the study of functional and effective connectivity, respectively. Yet, these measures have rarely been assessed in parallel in the context of mild cognitive impairment (MCI) and furthermore it has not been examined if they are related to risk factors of Alzheimer’s disease (AD) such as amyloid deposition and apolipoprotein ε4 (ApoE) allele occurrence. Here, we investigated functional and directed connectivities with Renormalized Partial Directed Coherence (RPDC) in 17 healthy controls (HC) and 17 participants with MCI. Participants underwent ApoE-genotyping and Pittsburgh compound B positron emission tomography (PiB-PET) to assess amyloid deposition. We observed lower spectral source power in MCI in the alpha and beta bands. Coherence was stronger in HC than MCI across different neuronal sources in the delta, theta, alpha, beta and gamma bands. The directed coherence analysis indicated lower information flow between fronto-temporal (including the hippocampus) sources and unidirectional connectivity in MCI. In MCI, alpha and beta RPDC showed an inverse correlation to age and gender; global amyloid deposition was inversely correlated to alpha coherence, RPDC and beta and gamma coherence. Furthermore, the ApoE status was negatively correlated to alpha coherence and RPDC, beta RPDC and gamma coherence. A classification analysis of cognitive state revealed the highest accuracy using EEG power, coherence and RPDC as input. For this small but statistically robust (Bayesian power analyses) sample, our results suggest that resting EEG related functional and directed connectivities are sensitive to the cognitive state and are linked to ApoE and amyloid burden.
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Affiliation(s)
- Lars Michels
- Clinic of Neuroradiology, University Hospital of ZurichZurich, Switzerland.,MR-Center, University Children's Hospital ZurichZurich, Switzerland
| | - Muthuraman Muthuraman
- Clinic for Neurology, University of KielKiel, Germany.,Clinic for Neurology, University of MainzMainz, Germany
| | - Abdul R Anwar
- Clinic for Neurology, University of KielKiel, Germany
| | - Spyros Kollias
- Clinic of Neuroradiology, University Hospital of ZurichZurich, Switzerland
| | - Sandra E Leh
- Division of Psychiatry Research and Psychogeriatric Medicine, University of ZurichZurich, Switzerland
| | - Florian Riese
- Division of Psychiatry Research and Psychogeriatric Medicine, University of ZurichZurich, Switzerland
| | - Paul G Unschuld
- Division of Psychiatry Research and Psychogeriatric Medicine, University of ZurichZurich, Switzerland
| | - Michael Siniatchkin
- Institute of Medical Psychology and Medical Sociology, Christian-Albrechts-University of KielKiel, Germany
| | - Anton F Gietl
- Division of Psychiatry Research and Psychogeriatric Medicine, University of ZurichZurich, Switzerland
| | - Christoph Hock
- Division of Psychiatry Research and Psychogeriatric Medicine, University of ZurichZurich, Switzerland
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Yurttas C, Schmitz C, Turgut M, Strekalova T, Steinbusch HW. The olfactory bulbectomized rat model is not an appropriate model for studying depression based on morphological/stereological studies of the hippocampus. Brain Res Bull 2017; 134:128-135. [DOI: 10.1016/j.brainresbull.2017.07.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/07/2017] [Accepted: 07/10/2017] [Indexed: 12/18/2022]
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10
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Vorobyov V, Bobkova N. Intracerebral interplay and neurotransmitter systems involvement in animal models of neurodegenerative disorders: EEG approach expectations. Neural Regen Res 2017; 12:66-67. [PMID: 28250746 PMCID: PMC5319240 DOI: 10.4103/1673-5374.198981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Affiliation(s)
- Vasily Vorobyov
- Institute of Cell Biophysics, Russian Academy of Sciences, Moscow Region, Russia
| | - Natalia Bobkova
- Institute of Cell Biophysics, Russian Academy of Sciences, Moscow Region, Russia
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11
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Behavior and the cholinergic parameters in olfactory bulbectomized female rodents: Difference between rats and mice. Behav Brain Res 2015; 297:5-14. [PMID: 26431763 DOI: 10.1016/j.bbr.2015.09.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/24/2015] [Accepted: 09/25/2015] [Indexed: 12/20/2022]
Abstract
Olfactory bulbectomy (OBX) in rodents induces a wide spectrum of functional disturbances, including behavioral, neurochemical, and neuromorphological alterations. We have examined the effects of OBX on behavior and the parameters of the cholinergic system in female rats and mice. In rats, OBX resulted in the appearance of some depressive-like behavioral marks, such as the decreased sucrose consumption, hyperactivity, impaired short-term memory and anxiety-like behavioral features, such as shortened presence in the center of the open field arena or open arms of the elevated plus-maze and an enhancement of avoidance behavior. These behavioral abnormalities could be associated with disturbances in hippocampal function, this suggestion being supported by the presence of cellular changes in this brain structure. No effect of OBX on the number of cholinergic neurons in the medial septum-diagonal band as well as on the acetylcholine content and acetylcholinesterase activity in the septum, hippocampus, and neocortex could be detected. In contrast, in mice, OBX impaired spontaneous alternation behavior and decreased the number of cholinergic neurons in the medial septum-diagonal band. These data demonstrate that rats and mice differently respond to OBX, in particular, OBX does not significantly affect the cholinergic system in rats.
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12
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Bobkova NV, Lyabin DN, Medvinskaya NI, Samokhin AN, Nekrasov PV, Nesterova IV, Aleksandrova IY, Tatarnikova OG, Bobylev AG, Vikhlyantsev IM, Kukharsky MS, Ustyugov AA, Polyakov DN, Eliseeva IA, Kretov DA, Guryanov SG, Ovchinnikov LP. The Y-Box Binding Protein 1 Suppresses Alzheimer's Disease Progression in Two Animal Models. PLoS One 2015; 10:e0138867. [PMID: 26394155 PMCID: PMC4578864 DOI: 10.1371/journal.pone.0138867] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 09/05/2015] [Indexed: 11/25/2022] Open
Abstract
The Y-box binding protein 1 (YB-1) is a member of the family of DNA- and RNA binding proteins. It is involved in a wide variety of DNA/RNA-dependent events including cell proliferation and differentiation, stress response, and malignant cell transformation. Previously, YB-1 was detected in neurons of the neocortex and hippocampus, but its precise role in the brain remains undefined. Here we show that subchronic intranasal injections of recombinant YB-1, as well as its fragment YB-11−219, suppress impairment of spatial memory in olfactory bulbectomized (OBX) mice with Alzheimer’s type degeneration and improve learning in transgenic 5XFAD mice used as a model of cerebral amyloidosis. YB-1-treated OBX and 5XFAD mice showed a decreased level of brain β-amyloid. In OBX animals, an improved morphological state of neurons was revealed in the neocortex and hippocampus; in 5XFAD mice, a delay in amyloid plaque progression was observed. Intranasally administered YB-1 penetrated into the brain and could enter neurons. In vitro co-incubation of YB-1 with monomeric β-amyloid (1–42) inhibited formation of β-amyloid fibrils, as confirmed by electron microscopy. This suggests that YB-1 interaction with β-amyloid prevents formation of filaments that are responsible for neurotoxicity and neuronal death. Our data are the first evidence for a potential therapeutic benefit of YB-1 for treatment of Alzheimer’s disease.
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MESH Headings
- Alzheimer Disease/genetics
- Alzheimer Disease/physiopathology
- Alzheimer Disease/prevention & control
- Amyloid beta-Peptides/metabolism
- Amyloid beta-Peptides/pharmacology
- Animals
- Animals, Newborn
- Brain/drug effects
- Brain/metabolism
- Brain/pathology
- Cells, Cultured
- Disease Models, Animal
- Disease Progression
- Electrophoresis, Polyacrylamide Gel
- Humans
- Immunohistochemistry
- Male
- Maze Learning/drug effects
- Mice, Inbred C57BL
- Mice, Inbred Strains
- Mice, Transgenic
- Microscopy, Confocal
- Neurons/drug effects
- Neurons/metabolism
- Olfactory Bulb/surgery
- Peptide Fragments/pharmacology
- Plaque, Amyloid/metabolism
- Plaque, Amyloid/prevention & control
- Rats
- Recombinant Proteins/pharmacology
- Y-Box-Binding Protein 1/chemistry
- Y-Box-Binding Protein 1/genetics
- Y-Box-Binding Protein 1/pharmacology
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Affiliation(s)
- N. V. Bobkova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - D. N. Lyabin
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | | | - A. N. Samokhin
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - P. V. Nekrasov
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - I. V. Nesterova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region, Russia
| | | | | | - A. G. Bobylev
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - I. M. Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region, Russia
| | - M. S. Kukharsky
- Institute of Physiologically Active Compounds, RAS, Chernogolovka, Moscow Region, Russia
| | - A. A. Ustyugov
- Institute of Physiologically Active Compounds, RAS, Chernogolovka, Moscow Region, Russia
| | - D. N. Polyakov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - I. A. Eliseeva
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - D. A. Kretov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - S. G. Guryanov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
| | - L. P. Ovchinnikov
- Institute of Protein Research, RAS, Pushchino, Moscow Region, Russia
- * E-mail:
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13
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Bobkova N, Vorobyov V. The brain compensatory mechanisms and Alzheimer's disease progression: a new protective strategy. Neural Regen Res 2015; 10:696-7. [PMID: 26109935 PMCID: PMC4468752 DOI: 10.4103/1673-5374.156954] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2015] [Indexed: 11/27/2022] Open
Affiliation(s)
- Natalia Bobkova
- Institute of Cell Biophysics, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia
| | - Vasily Vorobyov
- Institute of Cell Biophysics, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia
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14
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Fatty acids rehabilitated long-term neurodegenerative: like symptoms in olfactory bulbectomized rats. J Neural Transm (Vienna) 2014; 122:629-41. [DOI: 10.1007/s00702-014-1321-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 09/29/2014] [Indexed: 01/29/2023]
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15
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Olfactory bulbectomy as a putative model for Alzheimer’: The protective role of essential fatty acids. PHARMANUTRITION 2014. [DOI: 10.1016/j.phanu.2013.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Bobkova NV, Medvinskaya NI, Kamynina AV, Aleksandrova IY, Nesterova IV, Samokhin AN, Koroev DO, Filatova MP, Nekrasov PV, Abramov AY, Leonov SV, Volpina OM. Immunization with either prion protein fragment 95-123 or the fragment-specific antibodies rescue memory loss and neurodegenerative phenotype of neurons in olfactory bulbectomized mice. Neurobiol Learn Mem 2013; 107:50-64. [PMID: 24239620 DOI: 10.1016/j.nlm.2013.10.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 09/17/2013] [Accepted: 10/25/2013] [Indexed: 12/12/2022]
Abstract
Epidemiological studies demonstrated association between head injury (HI) and the subsequent development of Alzheimer's disease (AD). Certain hallmarks of AD, e.g. amyloid-β (Aβ) containing deposits, may be found in patients following traumatic BI (TBI). Recent studies uncover the cellular prion protein, PrP(C), as a receptor for soluble polymeric forms of Aβ (sAβ) which are an intermediate of such deposits. We aimed to test the hypothesis that targeting of PrP(C) can prevent Aβ related spatial memory deficits in olfactory bulbectomized (OBX) mice utilized here to resemble some clinical features of AD, such as increased level of Aβ, memory loss and deficit of the CNS cholin- and serotonin-ergic systems. We demonstrated that immunization with the a.a. 95-123 fragment of cellular prion (PrP-I) recovered cortical and hippocampus neurons from OBX induced degeneration, rescued spatial memory loss in Morris water maze test and significantly decrease the Aβ level in brain tissue of these animals. Affinity purified anti-PrP-I antibodies rescued pre-synaptic biomarker synaptophysin eliciting similar effect on memory of OBX mice, and protected hippocampal neurones from Aβ25-35-induced toxicity in vitro. Immunization OBX mice with a.a. 200-213 fragment of cellular prion (PrP-II) did not reach a significance in memory protection albeit having similar to PrP-I immunization impact on Aβ level in brain tissue. The observed positive effect of targeting the PrP-I by either active or passive immunization on memory of OBX mice revealed the involvement of the PrP(C) in AD-like pathology induced by olfactory bulbectomy. This OBX model may be a useful tool for mechanistic and preclinical therapeutic investigations into the association between PrP(C) and AD.
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Affiliation(s)
- N V Bobkova
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia.
| | - N I Medvinskaya
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia.
| | - A V Kamynina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia.
| | - I Y Aleksandrova
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia.
| | - I V Nesterova
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia.
| | - A N Samokhin
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia.
| | - D O Koroev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia.
| | - M P Filatova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia.
| | - P V Nekrasov
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia.
| | - A Y Abramov
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, WC1N 3BG London, UK.
| | - S V Leonov
- Institute of Cell Biophysics, Russian Academy of Sciences, ul. Institutskaya, 3. Pushchino, Russia; Department of Biology, Chemical Diversity Research Institute (CDRI), Rabochaya St., 2-A, 141400 Khimki, Moscow Region, Russia; BioBusiness Incubator, Moscow Institute of Physics and Technology, Institutsky pereulok, 9, Dolgoprudny, Moscow Region 141700, Russia.
| | - O M Volpina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia.
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17
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Bobkova N, Guzhova I, Margulis B, Nesterova I, Medvedinskaya N, Samokhin A, Alexandrova I, Garbuz D, Nudler E, Evgen’ev M. Dynamics of endogenous Hsp70 synthesis in the brain of olfactory bulbectomized mice. Cell Stress Chaperones 2013; 18:109-18. [PMID: 22836235 PMCID: PMC3508132 DOI: 10.1007/s12192-012-0359-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 07/13/2012] [Accepted: 07/16/2012] [Indexed: 02/07/2023] Open
Abstract
Numerous epidemiological studies have established acute brain injury as one of the major risk factors for the Alzheimer's disease (AD). However, the lack of animal models of AD-like degeneration triggered by a defined injury hampered the development of adequate therapies. Here we report that the surgical damage of the olfactory bulbs triggers the development of several pathologies, including amyloid-β accumulation and strong decrease of neuron density in the cortex and hippocampus as well as significant disturbance of spatial memory. Characteristically, these harmful consequences of the olfactory bulbectomy (OBX) have a peculiar dynamics in time with maximal manifestation in periods of 1-1.5 months and 8 months after the surgery and, hence, exhibit biphasic pattern with almost complete recovery period taking place at 5-6 months after the operation. The quantitative determination of endogenous inducible form of Hsp70 in different brain areas of OBX mice demonstrated characteristic fluctuations of Hsp70 levels depending on the time after the operation and age of mice. Interestingly, maximal induction of Hsp70 synthesis in the hippocampus exhibits clear-cut coincidence with the recovery period in OBX animals. The observed correlation enables to suggest curing effect of Hsp70 synthesis at an earlier period of pathology development and establishes it as a possible therapeutic agent for secondary grave consequences of brain injury, such as AD-like degeneration, for which neuroprotective therapy is urgently needed.
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Affiliation(s)
- Natalia Bobkova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290 Russia
| | - Irina Guzhova
- Institute of Cytology, RAS, St. Petersburg, 194064 Russia
| | - Boris Margulis
- Institute of Cytology, RAS, St. Petersburg, 194064 Russia
| | - Inna Nesterova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290 Russia
| | | | - Alexander Samokhin
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290 Russia
| | - Irina Alexandrova
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290 Russia
| | - David Garbuz
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991 Russia
| | - Evgeny Nudler
- Department of Biochemistry, New York University School of Medicine, New York, NY 10016 USA
| | - Michael Evgen’ev
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290 Russia
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991 Russia
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Lateralized hippocampal effects of vasoactive intestinal peptide on learning and memory in rats in a model of depression. Psychopharmacology (Berl) 2012; 221:561-74. [PMID: 22160165 DOI: 10.1007/s00213-011-2600-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 11/24/2011] [Indexed: 01/25/2023]
Abstract
RATIONALE Findings of pharmacological studies revealed that vasoactive intestinal peptide (VIP) plays a modulatory role in learning and memory. A role of the peptide in the neurobiological mechanisms of affective disorders was also suggested. OBJECTIVE The objectives are to study the involvement of VIP in learning and memory processes after unilateral and bilateral local application into hippocampal CA1 area in rats with a model of depression (bilateral olfactory bulbectomy--OBX) and to test whether VIP receptors could affect cognition. RESULTS VIP (50 ng) and combination (VIP(6-28) 10 ng + VIP 50 ng) microinjected bilaterally or into the right CA1 area improved the learning and memory of OBX rats in shuttle-box and step-through behavioral tests as compared to the saline-treated OBX controls. Left-side VIP microinjections did not affect the number of avoidances (shuttle box) and learning criteria (step through) as compared to the left-side saline-treated OBX controls. The administration of the combination into left CA1 influenced positively the performance in the step-through task. VIP antagonist (VIP(6-28), 10 ng) did not affect learning and memory of OBX rats. These findings suggest asymmetric effect of VIP on cognitive processes in hippocampus of rats with OBX model of depression. CONCLUSION Our results point to a lateralized modulatory effect of VIP injected in the hippocampal CA1 area on the avoidance deficits in OBX rats. The right CA1 area was predominantly involved in the positive effect of VIP on learning and memory. A possible role of the PAC1 receptors is suggested.
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Belcheva I, Ivanova M, Tashev R, Belcheva S. Differential involvement of hippocampal vasoactive intestinal peptide in nociception of rats with a model of depression. Peptides 2009; 30:1497-501. [PMID: 19467283 DOI: 10.1016/j.peptides.2009.05.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 05/14/2009] [Accepted: 05/15/2009] [Indexed: 11/23/2022]
Abstract
The effects of VIP microinjected unilaterally (left or right) into the hippocampal CA1 area at a dose of 10 and 100 ng or bilaterally (10 ng), on nociception of male Wistar rats with a model of depression (bilateral olfactory bulbectomy-OBX) were studied. Nociception was examined applying mechanical pressure on the left hind paw of the rat (analgesy-meter test). It was found that in OBX rats the pain threshold is increased. VIP showed differential effects depending on the side and dose of administration. The pain threshold after left-side microinjections of VIP into the hippocampal CA1 area of OBX rats was significantly higher than that after injections into right-side. There are no significant differences between right-side VIP-treated and OBX rats. Bilateral microinjections of VIP also exerted antinociceptive effect. These findings suggest that the hippocampal lateralized antinociceptive effect of VIP in OBX rats depends on the hemisphere of injection and suggest that VIP-ergic neurons in the hippocampal CA1 area may play differential role in nociception of rats with a model of depression.
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Affiliation(s)
- Iren Belcheva
- Department of Behavioral Neurobiology, Institute of Neurobiology, Bulgarian Academy of Sciences, 23, Acad. G. Bonchev St., 1113 Sofia, Bulgaria.
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