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Nedogreeva OA, Evtushenko NA, Manolova AO, Peregud DI, Yakovlev AA, Lazareva NA, Gulyaeva NV, Stepanichev MY. Oxidative Damage of Proteins Precedes Loss of Cholinergic Phenotype in the Septal Neurons of Olfactory Bulbectomized Mice. Curr Alzheimer Res 2021; 18:1140-1151. [PMID: 34951385 DOI: 10.2174/1567205019666211223094051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/04/2021] [Accepted: 12/02/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The development of cholinergic deficit is considered an early sign of a number of pathological conditions, including Alzheimer's disease. Cholinergic dysfunction underlies cognitive decline associated with both normal aging and Alzheimer's disease. OBJECTIVE Here, we studied a possible mechanism of functional impairment of cholinergic neurons using an olfactory bulbectomy model. METHODS Male mice were subjected to olfactory bulbectomy or sham surgery. Three weeks after that they were trained in Morris water maze and then euthanized one month after surgery. The cholinergic indices as well as the indices of oxidative stress were studied using immunohistochemistry, western blot and ELISA. Gene expression was studied using RT-qPCR. RESULTS The experimental treatment was followed by impaired learning of a standard spatial task in a water maze. This was associated with a decrease in the number of cells containing choline acetyltransferase (ChAT), in relation to total number of neurons in the medial septum and lower ChAT enzymatic activity in the hippocampus. However, the levels of mRNAs of ChAT, vesicular ACh transporter and acetylcholine esterase remained unchanged in bulbectomized mice compared to sham-operated animals. These alterations were preceded by the accumulation of protein-bound carbonyls, indicating oxidative damage of proteins, whereas oxidative damage of nucleic acids was not detected. CONCLUSION We assume that in olfactory bulbectomy model, oxidative damage of proteins may cause cholinergic dysfunction rather than irreversible neuronal damage. These data indicate that cholinergic neurons of the basal forebrain are very sensitive to oxidative stress, which may be responsible for the appearance of early cognitive decline in Alzheimer's disease.
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Affiliation(s)
- O A Nedogreeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - N A Evtushenko
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - A O Manolova
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - D I Peregud
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - A A Yakovlev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - N A Lazareva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - N V Gulyaeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
| | - M Y Stepanichev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow. Russian Federation
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Dobryakova YV, Stepanichev MY, Markevich VA, Bolshakov AP. Long-term potentiation in the hippocampal CA3 to CA1 synapses may be induced in vivo by activation of septal cholinergic inputs. Int J Neurosci 2020; 132:1-7. [PMID: 32916077 DOI: 10.1080/00207454.2020.1822834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/27/2020] [Accepted: 09/04/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE/AIM The role of cholinergic neurotransmission in the hippocampus remains controversial since different studies showed either no influence or its modulatory effect on glutamatergic hippocampal synapses. It remains unclear whether septal cholinergic input can modulate plasticity of synapses formed by CA3 pyramids on CA1 neurons. The aim of the study was to clarify the role of septal input in the development of LTP in this synapse. MATERIALS AND METHODS We recorded in vivo in rats under urethane anesthesia focal excitatory postsynaptic potential (fEPSP) characteristics in CA1 area after stimulation of the ventral hippocampal commissure (VHC), which contains both CA3 axons innervating CA1 neurons and cholinergic axons coming from the medial septum. We performed two series of experiments in which LTP was induced by tetanization of either VHC or medial septal area (MSA). Degeneration of cholinergic neurons in MSA was induced by intraseptal injection of 192IgG-saporin. RESULTS In both experimental series, tetanization induced an increase in fEPSP amplitude which lasted for at least 40 min after tetanic stimulation, although tetanization of VHC induced a larger increase in fEPSP amplitude compared to MSA tetanization. Elimination of septal cholinergic neurons by 192IgG-saporin abolished LTP development in both experimental series. This suppression of LTP in animals with cholinergic deficit was not due to loss of hippocampal neurons. CONCLUSIONS Our data suggest that activation of septal cholinergic fibers during tetanization is a critical factor of LTP induction in the hippocampal CA3 to CA1 synapses.
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Affiliation(s)
- Y V Dobryakova
- Neurophysiology of Learning Lab, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Science, Moscow, Russia
| | - M Yu Stepanichev
- Neurophysiology of Learning Lab, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Science, Moscow, Russia
| | - V A Markevich
- Neurophysiology of Learning Lab, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Science, Moscow, Russia
| | - A P Bolshakov
- Neurophysiology of Learning Lab, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Science, Moscow, Russia
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3
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Stepanichev MY. [The prospects of using the technology of genome editing for correction of neurodegenerative diseases.]. Adv Gerontol 2018; 31:892-903. [PMID: 30877819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We reviewed the results of modern studies using gene therapy methods for correction of neurodegenerative diseases. We analyzed approaches based on the technologies of gene editing and their prospective use in medicine. We discussed some limitations associated with the features of pathogenesis of neurodegenerative diseases for application of the genome editing tools directing to for the treatment of these pathologies.
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Affiliation(s)
- M Y Stepanichev
- Institute of Higher Nervous Activity and Neurophysiology RAS, 5a Butlerova str., Moscow 117485, Russian Federation; e-mail:
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4
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Gulyaeva NV, Bobkova NV, Kolosova NG, Samokhin AN, Stepanichev MY, Stefanova NA. Molecular and Cellular Mechanisms of Sporadic Alzheimer's Disease: Studies on Rodent Models in vivo. Biochemistry (Mosc) 2017; 82:1088-1102. [PMID: 29037130 DOI: 10.1134/s0006297917100029] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this review, recent data are presented on molecular and cellular mechanisms of pathogenesis of the most widespread (about 95%) sporadic forms of Alzheimer's disease obtained on in vivo rodent models. Although none of the available models can fully reproduce the human disease, several key molecular mechanisms (such as dysfunction of neurotransmitter systems, especially of the acetylcholinergic system, β-amyloid toxicity, oxidative stress, neuroinflammation, mitochondrial dysfunction, disturbances in neurotrophic systems) are confirmed with different models. Injection models, olfactory bulbectomy, and senescence accelerated OXYS rats are reviewed in detail. These three approaches to in vivo modeling of sporadic Alzheimer's disease have demonstrated a considerable similarity in molecular and cellular mechanisms of pathology development. Studies on these models provide complementary data, and each model possesses its specific advantages. A general analysis of the data reported for the three models provides a multifaceted and the currently most complete molecular picture of sporadic Alzheimer's disease. This is highly relevant also from the practical viewpoint because it creates a basis for elaboration and preclinical studies of means for treatment of this disease.
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Affiliation(s)
- N V Gulyaeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, 117485, Russia.
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Onufriev MV, Freiman SV, Peregud DI, Kudryashova IV, Tishkina AO, Stepanichev MY, Gulyaeva NV. Neonatal Proinflammatory Stress Induces Accumulation of Corticosterone and Interleukin-6 in the Hippocampus of Juvenile Rats: Potential Mechanism of Synaptic Plasticity Impairments. Biochemistry (Mosc) 2017; 82:275-281. [PMID: 28320268 DOI: 10.1134/s0006297917030051] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Infectious diseases in early postnatal ontogenesis can induce neuroinflammation, disrupt normal central nervous system development, and contribute to pathogenesis of cerebral pathologies in adults. To study long-term consequences of such early stress, we induced neonatal proinflammatory stress (NPS) by injecting bacterial lipopolysaccharide into rat pups on postnatal days 3 and 5 and then assessed the levels of corticosterone, proinflammatory cytokines and their mRNAs, and neurotrophins and their mRNAs in the hippocampus and neocortex of the one-month-old animals. Long-term potentiation (LTP) was studied in hippocampal slices as an index of synaptic plasticity. NPS-induced impairments of LTP were accompanied by the accumulation of corticosterone and IL-6 in the hippocampus. In the neocortex, a decrease in exon IV BDNF mRNA was detected. We suggest that excessive corticosterone delivery to hippocampal receptors and proinflammatory changes persisting during brain maturation are among the principal molecular mechanisms responsible for NPS-induced neuroplasticity impairments.
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Affiliation(s)
- M V Onufriev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, 117485, Russia.
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Peregud DI, Stepanichev MY, Lazareva NA, Panchenko LF, Gulyaeva NV. [Effect of a Single Injection of Brain Derived Neurotrophic Factor into Midline Ventral Tegmental Area on Morphine Reinforcing Properties]. Zh Vyssh Nerv Deiat Im I P Pavlova 2016; 66:632-640. [PMID: 30695408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Opiate reinforcement is considered as a stimulus inducing addiction, however underlying neurobiological mechanisms remain obscure. According to the literature, BDNF (brain-derived neurotrophic factor) in the lateral ventral tegmental area (VTA) could modulate morphine reinforcement, but the role of BDNF in the midline VTA has not been studied yet. The aim of the study was to investigate the effect of a single intra-mid- line VTA injection on the acquisition and expression of morphine conditioned place preference (CPP). CPP procedure was composed of eight conditioning sessions (one session per day): morphine (i.p., 10 mg/kg) and saline injections were paired to the compartments and counterbalanced.Recombinant human BDNF (0.75 ug) or phosphate-buffered saline (PBS) as a vehicle were injected once into the midline VTA one day before or after conditioning. According to the CPP test rats spent more time in the morphine-paired compartments a scompared to the saline-paired compartments (p < 0.05). After a single BDNF injection into the midline VTA be- fore conditioning, but not after conditioning, differences in time spent in morphine and saline-paired compartments did not reach significance (p > 0.05). Thus, taking into account limitations of the results, we sug- gest that BDNF in the midline VTA may block morphine reinforcement.
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Stepanichev MY, Tishkina AO, Novikova MR, Levshina IP, Piskunov AK, Lazareva NA, Gulyaeva NV. [The Effects of Chronic Combined Stress: Changes in Behavior of Rats with Various Responses to Novelty]. Zh Vyssh Nerv Deiat Im I P Pavlova 2016; 66:611-625. [PMID: 30695406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We studied the effect of chronic combined stress (model of experimental neurosis) on behavior of rats with different basal strategies of behavior in novelty conditions. Chronic stress resulted in decreases in the body weight and testosterone contents in the blood and neocortex in all animals. Animals with initially low orient- ing-exploratory response in the "open field" test did not exhibit substantial alterations of behavior during repeated testing in this test of the "dark-light chamber" test; however, the depression-like behavior was more expressed in the second forced swim test. Chronic combined stress did not significantly affect the behavior of this group of rats. Animals with initially high orienting-exploratory response in the "open field" test exhibited decreased locomotor and exploratory activity in the repeated "open field" tests. The decreases in the locomotor and exploratory activity were substantially less expressed in the repeated tests in these rats after chronic combined stress. The indices of depression-like behavior increased one month after the end of exposure to chronic combined stress. Our data demonstrate that different responses to novelty in the "open field" test do not allow predict with reasonable certainty the development of depression-like behavior after exposure to chronic combined stress.
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Komol'tsev IG, Lyovshina IP, Novikova MR, Stepanichev MY, Tishkina AO, Gulyayeva NV. [CHANGES OF THE CEREBRAL CORTEX AFTER DOSED TRAUMATIC BRAIN INJURY IN RATS OF DIFFERENT AGES]. Morfologiia 2015; 148:14-20. [PMID: 26987212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Using dosed lateral fluid percussion, moderate and severe traumatic brain injury (TBI) was modeled in one- and two-year-old rats. Brain sections were stained using the Nissl cresyl violet method and an immunohistochemical reaction was performed for the demonstration of glial fibrillary acidic protein (GFAP), a marker of astrocytes. The results obtained indicate the formation in the cerebral cortex, ipsilateral to the impact, the zones of direct and remote of injury. The zone of direct injury corresponded to the area of immediate contact of the liquid column with the dura mater, whereas the remote area of damage was located laterally and caudally to the former. Morphological signs of the injury depended on the force of impact and were manifested in both age groups by astrocytic gliosis and the thinning of layer I of the cortex resulting from neuronal death. The emergence of ischemia-modified neurons, probably, was due to a local disruption of the blood supply. Disorders in the brain in one-year-old rats had a local character and those in two-year-old rats were diffuse, while gliosis was inhomogeneous. The reproducibility and adequacy of the model allow its use for research of molecular-genetic mechanisms of TBI outcomes in humans, as well as for the identification of common mechanisms of TBI consequences and the pathogenesis of the major diseases, comorbid with TBI, primarily depression and epilepsy.
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Aniol VA, Stepanichev MY, Lazareva NA, Gulyaeva NV. An early decrease in cell proliferation after pentylenetetrazole-induced seizures. Epilepsy Behav 2011; 22:433-41. [PMID: 21907628 DOI: 10.1016/j.yebeh.2011.08.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 07/28/2011] [Accepted: 08/01/2011] [Indexed: 01/17/2023]
Abstract
There are increasing data on the influence of seizures on neurogenesis in the adult brain. However, data on cell proliferation and differentiation during the early stages of kindling are scarce. We have used pentylenetetrazole (PTZ)-induced kindling to investigate the temporal profile of cytogenesis in the germinative zones of adult rat brain. For comparison, we also used a single PTZ-induced generalized tonic-clonic seizure. During kindling development, the density of 5-bromo-2'-deoxyuridine-positive cells demonstrated similar changes in all germinative zones: a dramatic decrease after the first subthreshold PTZ injection, and a gradual increase to the control level following repeated PTZ administration. On the contrary, a single PTZ-induced generalized tonic-clonic seizure was followed by an increase in the number of proliferating cells in both the dentate gyrus and the subventricular zone. These results may indicate the existence of global mechanisms affecting cellular proliferation in adult brain during seizures. Different temporal profiles of neuronal damage and proliferation changes suggest that neurodegeneration is unlikely to be a global proliferation-regulating factor. The data may contribute to better understanding of the initial phase of kindling development and epileptogenesis.
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Affiliation(s)
- V A Aniol
- Department of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia
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Antipova TA, Sapozhnikova DS, Stepanichev MY, Onufriev MV, Gulyaeva NV, Seredenin SB. Effects of selective anxiolytic afobazole on active caspase-3. Bull Exp Biol Med 2011; 149:201-3. [PMID: 21113491 DOI: 10.1007/s10517-010-0907-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We studied the effects of afobazole on apoptosis through active caspase-3. Afobazole in a final concentration of 10(-8) M inhibits hyperactivation of effector apoptotic caspase-3 in HT-22 cell culture under conditions of glutamate toxicity.
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Affiliation(s)
- T A Antipova
- Laboratory of Pharmacology of Neuroprotection, V. V. Zakusov Institute of Pharmacology, Russian Academy of Medical Sciences, Russia.
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11
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Stepanichev MY, Moiseeva YV, Lazareva NA, Onufriev MV, Gulyaeva NV. Changes in cell proliferation in the subventricular zone of the brain in adult rats given beta-amyloid peptide (25-35). ACTA ACUST UNITED AC 2009; 40:123-6. [PMID: 20033317 DOI: 10.1007/s11055-009-9232-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2008] [Indexed: 11/28/2022]
Abstract
The effects of intracerebroventricular administration of fragment (25-35) of beta-amyloid peptide [Abeta(25-35)] on cell proliferation in the subventricular zone of the dentate gyrus of the hippocampus in adult rats were analyzed. Animals received doses of 15 nmol of pre-aggregated Abeta(25-35) or the Abeta(35-25) control peptide, or solvent (sterile water) into the lateral ventricles. On post-injection days 1-5, rats received intraperitoneal injections of the thymidine analog 5-bromo-2'-deoxyuridine (BrdU). BrdU incorporated into DNA was detected immunohistochemically on frontal brain sections six and 12 days after peptide administration. At six days, the numbers of BrdU-containing cells in the subventricular zone showed no differences between the study groups. At 12 days, the total number of BrdU-positive cells decreased significantly in all study groups. At the same time, the number of labeled cells in rats given Abeta(25-35) was significantly greater in this brain zone than in animals given water or the control peptide. Thus, Abeta(25-35) significantly increased cell proliferation in the subventricular zone after intracerebroventricular administration.
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Affiliation(s)
- M Yu Stepanichev
- Laboratory for the Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia
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12
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Onufriev MV, Yakovlev AA, Lyzhin AA, Stepanichev MY, Khaspekov LG, Gulyaeva NV. A secreted caspase-3-substrate-cleaving activity at low pH belongs to cathepsin B: a study on primary brain cell cultures. Biochemistry (Mosc) 2009; 74:281-7. [PMID: 19364322 DOI: 10.1134/s0006297909030067] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The cysteine proteases caspase-3 and cathepsins are involved in both neuronal plasticity and neuropathology. Using primary neuroglial and glial cerebellar cultures, the pH dependence of cleavage of a synthetic caspase-3 substrate, Ac-DEVD-AMC, was studied. At acidic pH, cathepsin B cleaved Ac-DEVD, this activity being significantly higher than that of caspase-3 at pH 7.4. This activity is blocked by peptide inhibitors of both caspase-3 and cathepsin B. Substitution of culture medium for balanced salt solution stimulated cathepsin B secretion in both types of cultures. Ischemia (oxygen-glucose deprivation) significantly decreased secretion of cathepsin B activities into the culture medium.
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Affiliation(s)
- M V Onufriev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117485 Moscow, Russia
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Tishkina AO, Levshina IP, Lazareva NA, Passikova NV, Stepanichev MY, Ajrapetyanz MG, Gulyaeva NV. Chronic stress induces nonapoptotic neuronal death in the rat hippocampus. Dokl Biol Sci 2009; 428:403-406. [PMID: 19994774 DOI: 10.1134/s0012496609050032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- A O Tishkina
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, ul. Butlerova 5, Moscow, 117485 Russia
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Pavlova TV, Yakovlev AA, Stepanichev MY, Gulyaeva NV. Pentylenetetrazol kindling in rats: Is neurodegeneration associated with manifestations of convulsive activity? ACTA ACUST UNITED AC 2006; 36:741-8. [PMID: 16841155 DOI: 10.1007/s11055-006-0082-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2005] [Indexed: 10/24/2022]
Abstract
Structural changes in neurons and measures of oxidative stress were studied in the hippocampus of rats tolerant (ST) and sensitive (SS) to developing clonic-tonic seizures in conditions of pentylenetetrazol kindling. Sequences of 11 injections of pentylenetetrazol significantly decreased the number of normal neurons in hippocampal field CA1 in SS rats, this effect being seen in both hippocampal field CA1 and the dentate fascia in ST rats. Decreases in the numbers of normal neurons were accompanied by increases in the numbers of damaged cells in field CA4 in rats of both groups. After 21 injections, decreases in the numbers of normal neurons were seen in field CA1 in both SS and ST rats, while the numbers of damaged neurons were significantly greater than control only in ST rats in fields CA1 and CA4. The glutathione level was significantly lower in the hippocampus in both groups of rats than in controls. Thus, rats " tolerant" to developing convulsions show signs of oxidative stress and neurodegenerative changes in the hippocampus. This suggests that oxidative neuron damage leading to neurodegeneration in the pentylenetetrazol kindling model is not directly associated with convulsive activity.
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Affiliation(s)
- T V Pavlova
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5a Butlerov Street, 117485 Moscow, Russia
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15
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Bravarenko NI, Onufriev MV, Stepanichev MY, Ierusalimsky VN, Balaban PM, Gulyaeva NV. Caspase-like activity is essential for long-term synaptic plasticity in the terrestrial snail Helix. Eur J Neurosci 2006; 23:129-40. [PMID: 16420423 DOI: 10.1111/j.1460-9568.2005.04549.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Although caspase activity in the nervous system of mollusks has not been described before, we suggested that these cysteine proteases might be involved in the phenomena of neuroplasticity in mollusks. We directly measured caspase-3 (DEVDase) activity in the Helix lucorum central nervous system (CNS) using a fluorometrical approach and showed that the caspase-3-like immunoreactivity is present in the central neurons of Helix. Western blots revealed the presence of caspase-3-immunoreactive proteins with a molecular mass of 29 kDa. Staurosporin application, routinely used to induce apoptosis in mammalian neurons through the activating cleavage of caspase-3, did not result in the appearance of a smaller subunit corresponding to the active caspase in the snail. However, it did increase the enzyme activity in the snail CNS. This suggests differences in the regulation of caspase-3 activity in mammals and snails. In the snail CNS, the caspase homolog seems to possess an active center without activating cleavage typical for mammals. In electrophysiological experiments with identified snail neurons, selective blockade of the caspase-3 with the irreversible and cell-permeable inhibitor of caspase-3 N-benzyloxycarbonyl-Asp(OMe)-Glu(OMe)-Val-Asp-(OMe)-fluoro-methylketone prevented development of the long-term stage of synaptic input sensitization, suggesting that caspase is necessary for normal synaptic plasticity in snails. The results of our study give the first direct evidence that the caspase-3-like activity is essential for long-term plasticity in the invertebrate neurons. This activity is presumably involved in removing inhibitory constraints on the storage of long-term memory.
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Affiliation(s)
- N I Bravarenko
- Institute of Higher Nervous Activity and Neurophysiology, Butlerova 5A, Moscow 117485, Russia
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16
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Stepanichev MY, Zdobnova IM, Zarubenko II, Lazareva NA, Gulyaeva NV. Studies of the Effects of Central Administration of β-Amyloid Peptide (25–35): Pathomorphological Changes in the Hippocampus and Impairment of Spatial Memory. ACTA ACUST UNITED AC 2006; 36:101-6. [PMID: 16328175 DOI: 10.1007/s11055-005-0167-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2003] [Accepted: 09/29/2003] [Indexed: 10/25/2022]
Abstract
The possible link between amnesia induced by central administration of beta-amyloid (25-35) (Abeta(25-35)) and neurodegenerative changes in the hippocampus was studied. Male Wistar rats received single intracerebroventricular injections of Abeta(25-35) at a dose of 15 nmoles and one month later were trained in an eight-arm radial maze. Training was followed by histological assessment of the state of the hippocampus on brain sections stained with hematoxylin and eosin. Abeta(25-35) induced impairments in long-term (reference) and working memory on testing in the maze. There was a moderate reduction in the number of neurons in hippocampal field CA1; there was no change in the number of cells in field CA3. The numbers of errors made by the animals on testing in the maze were found to correlate negatively with the numbers of nerve cells in hippocampal field CA1. Thus, this is the first demonstration that impairments of learning and memory induced by single doses of Abeta(25-35) are specifically associated with neurodegenerative changes in hippocampal field CA1 in rats.
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Affiliation(s)
- M Yu Stepanichev
- Laboratory for the Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.
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Zarubenko II, Yakovlev AA, Stepanichev MY, Gulyaeva NV. Electroconvulsive Shock Induces Neuron Death in the Mouse Hippocampus: Correlation of Neurodegeneration with Convulsive Activity. ACTA ACUST UNITED AC 2005; 35:715-21. [PMID: 16433067 DOI: 10.1007/s11055-005-0115-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The relationship between convulsive activity evoked by repeated electric shocks and structural changes in the hippocampus of Balb/C mice was studied. Brains were fixed two and seven days after the completion of electric shocks, and sections were stained by the Nissl method and immunohistochemically for apoptotic nuclei (the TUNEL method). In addition, the activity of caspase-3, the key enzyme of apoptosis, was measured in brain areas immediately after completion of electric shocks. The number of neurons decreased significantly in field CA1 and the dentate fascia, but not in hippocampal field CA3. The numbers of cells in CA1 and CA3 were inversely correlated with the intensity of convulsions. Signs of apoptotic neuron death were not seen, while caspase-3 activity was significantly decreased in the hippocampus after electric shocks. These data support the notion that functional changes affect neurons after electric shock and deepen our understanding of this view, providing direct evidence that there are moderate (up to 10%) but significant levels of neuron death in defined areas of the hippocampus. Inverse correlations of the numbers of cells with the extent of convulsive activity suggest that the main cause of neuron death is convulsions evoked by electric shocks.
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Affiliation(s)
- I I Zarubenko
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5a Butlerov Street, 117485 Moscow, Russia
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18
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Stepanichev MY, Moiseeva YV, Lazareva NA, Gulyaeva NV. Studies of the effects of fragment (25?35) of beta-amyloid peptide on the behavior of rats in a radial maze. ACTA ACUST UNITED AC 2005; 35:511-8. [PMID: 16033199 DOI: 10.1007/s11055-005-0086-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Decreases in cognitive functions, particularly long-term (episodic) and working memory, are among the earliest prognostic signs of Alzheimer's disease. The toxicity of beta-amyloid peptide is regarded as a major cause of neurodegeneration and cognitive impairment in this disease. The present report describes studies of the effects of intracerebroventricular administration of beta-amyloid peptide (25-35) (Abeta(25-35)) on the reproduction of a previously assimilated habit consisting of finding food in an eight-arm radial maze in rats. Abeta(25-35) was given bilaterally at doses of 15 and 30 nmol/animal seven days after preliminary training. Testing was performed 60 days after peptide administration. The results showed that Abeta(25-35) impaired working memory in rats without having any significant effect on the retention of responses. We were unable to demonstrate any relationship between memory impairment and the dose of peptide given. These data provide evidence of the ability of Abeta(25-35) to produce greater degradation of working memory function than long-term memory function.
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Affiliation(s)
- M Yu Stepanichev
- Laboratory for the Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
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19
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Stepanichev MY, Kudryashova IV, Yakovlev AA, Onufriev MV, Khaspekov LG, Lyzhin AA, Lazareva NA, Gulyaeva NV. Central administration of a caspase inhibitor impairs shuttle-box performance in rats. Neuroscience 2005; 136:579-91. [PMID: 16198488 DOI: 10.1016/j.neuroscience.2005.08.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2004] [Revised: 08/02/2005] [Accepted: 08/02/2005] [Indexed: 01/29/2023]
Abstract
Recent studies suggest that caspase-3-mediated mechanisms are essential for neuronal plasticity. N-benzyloxycarbonyl-Asp(OMe)-Glu(OMe)-Val- Asp(OMe)-fluoromethyl ketone (z-DEVD-fmk), a caspase inhibitor with predominant specificity toward caspase-3, has been shown to block long-term potentiation in hippocampal slices. Intrahippocampal infusion of a caspase-3 inhibitor to rats has been shown to significantly impair spatial memory in the water maze. The present work was designed to study whether i.c.v. administration of a caspase-3 inhibitor z-DEVD-fmk impairs learning in other tasks related to specific forms of memory in rats. The rats received bilateral injections of z-DEVD-fmk or N-benzyloxycarbonyl-Phe-Ala-fluoromethyl ketone (z-FA-fmk) ("control" peptide) at a dose of 3 nmol. Administration of z-DEVD-fmk significantly decreased the number of avoidance reactions in some blocks of trials in the active avoidance (shuttle box) learning, while z-FA-fmk had no effect as compared with intact rats. However, only a slight effect of the caspase inhibitor across the session was found. z-DEVD-fmk impaired development of some essential components of the two-way active avoidance performance, such as escape reaction, conditioned fear reaction, and inter-trial crossings. Measurement of caspase-3 activity in rat brain regions involved in active avoidance learning revealed most expressed z-DEVD-fmk-related inhibition of the enzyme activity (about 30%) in the fronto-parietal cortex. A similar effect was close to significant in the hippocampus, but not in the other cerebral structures studied. In primary cultures of cerebellar neurons z-DEVD-fmk (2-50 microM) inhibited caspase-3 activity by 60-87%. We suggest that moderate inhibition of caspase-3 resulting from the central administration of z-DEVD-fmk to rats may impair active avoidance learning. Taking into account previous data on the involvement of neuronal caspase-3 in neuroplasticity phenomena we assume that the enzyme may be important for selected forms of learning.
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Affiliation(s)
- M Yu Stepanichev
- Department of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerov Street 5A, Moscow 117485, Russia
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20
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Pavlova TV, Yakovlev AA, Stepanichev MY, Mendzheritskii AM, Gulyaeva NV. Pentylenetetrazole Kindling Induces Activation of Caspase-3 in the Rat Brain. ACTA ACUST UNITED AC 2004; 34:45-7. [PMID: 15109082 DOI: 10.1023/b:neab.0000003246.26997.10] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T V Pavlova
- Laboratory for the Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow
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21
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Stepanichev MY, Moiseeva YV, Lazareva NA, Onufriev MV, Gulyaeva NV. Single intracerebroventricular administration of amyloid-beta (25-35) peptide induces impairment in short-term rather than long-term memory in rats. Brain Res Bull 2003; 61:197-205. [PMID: 12832007 DOI: 10.1016/s0361-9230(03)00118-7] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Ample experimental evidence indicates that intracerebral injection or infusion of amyloid-beta peptides (Abeta) to rodents induces learning and memory impairments as well as neurodegeneration in brain areas related to cognitive function. In the present study, we assessed the effects of a single intracerebroventricular (i.c.v.) injection of aggregated Abeta fragment (25-35) at a dose of 15nmol/rat on short-term and long-term memory in rats during the 6-month post-surgery period. The results demonstrate that Abeta(25-35)-induced memory impairments in spontaneous alternation behavior in a Y-maze at 17, 36, and 180 days after the surgery as well as in a social recognition task 110 days post-surgery. Abeta(25-35) also impaired spatial memory in an 8-arm radial maze, but did not influence performance of the step-down passive avoidance task. These results suggest that Abeta(25-35) preferably induces impairments of spatial and non-spatial short-term (working) memory rather than long-term memory in rats.
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Affiliation(s)
- M Yu Stepanichev
- Department of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5a Butlerov Str., Moscow 117485, Russia
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22
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Egorova LK, Stepanichev MY, Mikhalev SL, Kutepova OA, Gulyaeva NV. Analysis of cyclic adenosine-3',5'-monophosphate levels in structures of the "informational" and "motivational" systems of the rat brain during acquisition of a conditioned active avoidance reaction. Neurosci Behav Physiol 2003; 33:329-33. [PMID: 12774833 DOI: 10.1023/a:1022887321863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Cyclic adenosine-3'5'-monophosphate (cAMP) levels in structures of the "informational" and "motivational" systems of the brain were measured during acquisition of a conditioned two-sided active avoidance reflex in rats. cAMP levels were measured in three groups of animals--intact animals, trained animals, and an active control group (given uncombined presentations of the conditioned (light) and unconditioned (electric shock) stimuli)--immediately after reproduction of the acquired reflex. Significant accumulation of cAMP levels in brain structures was seen in animals of the active control group in the hypothalamus and in trained animals in the left and right hippocampus and the right frontal cortex. Positive correlations were found between cAMP levels in symmetrical parts of the frontal cortex, amygdala, and hypothalamus in animals of all study groups. In addition, active control rats and trained rats showed interhemisphere and intrahemisphere correlations between cAMP levels in brain macrostructure, whose patterns were specific for each group. The pattern of correlations observed here is assessed from the point of view of the role of the "informational" and "motivational" structures in the organization of adaptive behavior.
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Affiliation(s)
- L K Egorova
- Laboratory for Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow
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23
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Trubetskaya VV, Stepanichev MY, Onufriev MV, Lazareva NA, Markevich VA, Gulyaeva NV. Administration of aggregated beta-amyloid peptide (25-35) induces changes in long-term potentiation in the hippocampus in vivo. Neurosci Behav Physiol 2003; 33:95-8. [PMID: 12669778 DOI: 10.1023/a:1021761310435] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Intracereroventricular administration of aggregated beta-amyloid protein fragment (25-35) (7.5 nmol/ventricle) was followed one month later by significant changes in the dynamics of long-term potentiation in the hippocampus in vivo, expressed as powerful and stable increases in the amplitude of evoked potentials. This phenomenon may be associated with oxidative stress in the hippocampus, which has previously been demonstrated in this model, and, thus, with disturbances in ion homeostasis.
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Affiliation(s)
- V V Trubetskaya
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow
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Gurvitch AM, Mutuskina EA, Zarzhetsky YV, Trubina IE, Avruschenko MS, Pylova SI, Volkov AV, Lazareva NA, Stepanichev MY, Onufriev MV, Gulyaeva NV. Prophylaxis of encephalopathies and risk factors of atherogenesis development in the postresuscitation period in rats by means of succinic acid. Resuscitation 1997; 35:165-70. [PMID: 9316202 DOI: 10.1016/s0300-9572(97)00045-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The effect of oral administration of succinic acid was studied in 66 rats exposed to 10 min cardiac arrest with further resuscitation. A total of 30 mg/kg of the drug were administered daily for 5 days starting with day 3 up to day 7 after resuscitation. The experiments have revealed that treatment with succinic acid caused normalization of the orienting behavior in an 'open field' test, decrease of the intensity of response to electric shock, normalization of free radical formation in the brain and serum and reduced cerebral morphological changes. The succinic acid prevented the increase of cholesterol, triglyceride and low density lipoproteins in the blood. The data suggested that after additional trials the succinic acid could be used to prevent development of postresuscitation encephalopathies (3 months after reanimation).
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Affiliation(s)
- A M Gurvitch
- Research Institute of General Reanimatology, Russian Academy of Medical Sciences, Moscow, Russian Federation
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