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Zernov N, Popugaeva E. Role of Neuronal TRPC6 Channels in Synapse Development, Memory Formation and Animal Behavior. Int J Mol Sci 2023; 24:15415. [PMID: 37895105 PMCID: PMC10607207 DOI: 10.3390/ijms242015415] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/11/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
The transient receptor potential cation channel, subfamily C, member 6 (TRPC6), has been believed to adjust the formation of an excitatory synapse. The positive regulation of TRPC6 engenders synapse enlargement and improved learning and memory in animal models. TRPC6 is involved in different synaptoprotective signaling pathways, including antagonism of N-methyl-D-aspartate receptor (NMDAR), activation of brain-derived neurotrophic factor (BDNF) and postsynaptic store-operated calcium entry. Positive regulation of TRPC6 channels has been repeatedly shown to be good for memory formation and storage. TRPC6 is mainly expressed in the hippocampus, particularly in the dentate granule cells, cornu Ammonis 3 (CA3) pyramidal cells and gamma-aminobutyric acid (GABA)ergic interneurons. It has been observed that TRPC6 agonists have a great influence on animal behavior including memory formation and storage The purpose of this review is to collect the available information on the role of TRPC6 in memory formation in various parts of the brain to understand how TRPC6-specific pharmaceutical agents will affect memory in distinct parts of the central nervous system (CNS).
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Affiliation(s)
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
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Zernov N, Bezprozvanny I, Popugaeva E. CaMKIIβ knockdown decreases store-operated calcium entry in hippocampal dendritic spines. IBRO Neurosci Rep 2022; 12:90-97. [PMID: 35079728 PMCID: PMC8777283 DOI: 10.1016/j.ibneur.2022.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 01/06/2022] [Accepted: 01/08/2022] [Indexed: 01/13/2023] Open
Abstract
Calcium/calmodulin-dependent protein kinase II (CaMKII) and neuronal store-operated calcium entry (nSOCE) have been implicated in the development of Alzheimer's disease (AD). nSOCE is involved in regulation of dendritic spine shape, particularly in stability of mushroom spines that play role in formation of strong synapses. CaMKII is involved in regulation of induction of long-term potentiation, that is needed for shaping of memory. In the present study, we demonstrated that inhibition of kinase activity of CaMKII by KN-62 decreases nSOCE amplitude in soma of primary hippocampal neurons. We have shown that knockdown of CaMKIIβ leads to the downregulation of nSOCE in dendritic spines. In agreement with previously published data, we have also observed that CaMKIIβ knockdown causes mushroom spine loss in primary hippocampal culture. The effect of CaMKIIβ knockdown on the nSOCE may be associated with a decrease of dendritic spine head size.
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Affiliation(s)
- Nikita Zernov
- Peter the Great St.Petersburg Polytechnic University, Laboratory of Molecular Neurodegeneration, St.Petersburg, Russia
| | - Ilya Bezprozvanny
- Peter the Great St.Petersburg Polytechnic University, Laboratory of Molecular Neurodegeneration, St.Petersburg, Russia
- UT Southwestern Medical Center, Department of Physiology, Dallas, USA
| | - Elena Popugaeva
- Peter the Great St.Petersburg Polytechnic University, Laboratory of Molecular Neurodegeneration, St.Petersburg, Russia
- Corresponding author.
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Hunanyan L, Ghamaryan V, Makichyan A, Popugaeva E. Computer-Based Drug Design of Positive Modulators of Store-Operated Calcium Channels to Prevent Synaptic Dysfunction in Alzheimer's Disease. Int J Mol Sci 2021; 22:ijms222413618. [PMID: 34948414 PMCID: PMC8707499 DOI: 10.3390/ijms222413618] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 11/25/2022] Open
Abstract
Store-operated calcium entry (SOCE) constitutes a fine-tuning mechanism responsible for the replenishment of intracellular stores. Hippocampal SOCE is regulated by store-operated channels (SOC) organized in tripartite complex TRPC6/ORAI2/STIM2. It is suggested that in neurons, SOCE maintains intracellular homeostatic Ca2+ concentration at resting conditions and is needed to support the structure of dendritic spines. Recent evidence suggests that positive modulators of SOC are prospective drug candidates to treat Alzheimer’s disease (AD) at early stages. Although STIM2 and ORAI2 are definitely involved in the regulation of nSOC amplitude and a play major role in AD pathogenesis, growing evidence suggest that it is not easy to target these proteins pharmacologically. Existing positive modulators of TRPC6 are unsuitable for drug development due to either bad pharmacokinetics or side effects. Thus, we concentrate the review on perspectives to develop specific nSOC modulators based on available 3D structures of TRPC6, ORAI2, and STIM2. We shortly describe the structural features of existing models and the methods used to prepare them. We provide commonly used steps applied for drug design based on 3D structures of target proteins that might be used to develop novel AD preventing therapy.
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Affiliation(s)
- Lernik Hunanyan
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
- Laboratory of Structural Bioinformatics, Institute of Biomedicine and Pharmacy, Russian-Armenian University, Yerevan 0051, Armenia; (V.G.); (A.M.)
| | - Viktor Ghamaryan
- Laboratory of Structural Bioinformatics, Institute of Biomedicine and Pharmacy, Russian-Armenian University, Yerevan 0051, Armenia; (V.G.); (A.M.)
| | - Ani Makichyan
- Laboratory of Structural Bioinformatics, Institute of Biomedicine and Pharmacy, Russian-Armenian University, Yerevan 0051, Armenia; (V.G.); (A.M.)
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
- Correspondence:
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Popugaeva E. Fine Tuning of Intracellular Ca 2+ Content by Pharmacological Agents - A Strategy to Prevent Synapse Loss in Alzheimer Disease Hippocampal Neurons. Curr Alzheimer Res 2021; 17:1065-1071. [PMID: 33463468 DOI: 10.2174/1567205018666210119145735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 03/30/2020] [Revised: 10/05/2020] [Accepted: 10/22/2020] [Indexed: 11/22/2022]
Abstract
Alzheimer disease is the dominant form of elderly dementia. Today all clinical trials that target β-amyloid have failed to indicate that β-amyloid may not be a causative agent in AD pathogenesis. Thus there is a need to search for alternative ways to treat AD patients. Neuronal store-operated calcium entry is a fine-tuning mechanism that regulates intracellular Ca2+ content. Recent evidence suggests that store-operated calcium channels may be targeted with pharmacological agents in order to prevent synapse loss, recover long-term potentiation and change behavior. Current mini-review discusses basic chemical structures that modulate intracellular calcium dysbalance via targeting store-operated calcium channels and their applicability as anti-AD pharmacological agents.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
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Prikhodko V, Chernyuk D, Sysoev Y, Zernov N, Okovityi S, Popugaeva E. Potential Drug Candidates to Treat TRPC6 Channel Deficiencies in the Pathophysiology of Alzheimer's Disease and Brain Ischemia. Cells 2020; 9:cells9112351. [PMID: 33114455 PMCID: PMC7692306 DOI: 10.3390/cells9112351] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/28/2020] [Accepted: 10/20/2020] [Indexed: 12/16/2022] Open
Abstract
Alzheimer’s disease and cerebral ischemia are among the many causative neurodegenerative diseases that lead to disabilities in the middle-aged and elderly population. There are no effective disease-preventing therapies for these pathologies. Recent in vitro and in vivo studies have revealed the TRPC6 channel to be a promising molecular target for the development of neuroprotective agents. TRPC6 channel is a non-selective cation plasma membrane channel that is permeable to Ca2+. Its Ca2+-dependent pharmacological effect is associated with the stabilization and protection of excitatory synapses. Downregulation as well as upregulation of TRPC6 channel functions have been observed in Alzheimer’s disease and brain ischemia models. Thus, in order to protect neurons from Alzheimer’s disease and cerebral ischemia, proper TRPC6 channels modulators have to be used. TRPC6 channels modulators are an emerging research field. New chemical structures modulating the activity of TRPC6 channels are being currently discovered. The recent publication of the cryo-EM structure of TRPC6 channels should speed up the discovery process even more. This review summarizes the currently available information about potential drug candidates that may be used as basic structures to develop selective, highly potent TRPC6 channel modulators to treat neurodegenerative disorders, such as Alzheimer’s disease and cerebral ischemia.
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Affiliation(s)
- Veronika Prikhodko
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (V.P.); (D.C.); (Y.S.); (N.Z.)
- Department of Pharmacology and Clinical Pharmacology, Saint Petersburg State Chemical Pharmaceutical University, 197022 St. Petersburg, Russia;
- N.P. Bechtereva Institute of the Human Brain of the Russian Academy of Sciences, 197376 St. Petersburg, Russia
| | - Daria Chernyuk
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (V.P.); (D.C.); (Y.S.); (N.Z.)
| | - Yurii Sysoev
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (V.P.); (D.C.); (Y.S.); (N.Z.)
- Department of Pharmacology and Clinical Pharmacology, Saint Petersburg State Chemical Pharmaceutical University, 197022 St. Petersburg, Russia;
- N.P. Bechtereva Institute of the Human Brain of the Russian Academy of Sciences, 197376 St. Petersburg, Russia
- Institute of Translational Biomedicine, Saint Petersburg State University, 199034 St. Petersburg, Russia
| | - Nikita Zernov
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (V.P.); (D.C.); (Y.S.); (N.Z.)
| | - Sergey Okovityi
- Department of Pharmacology and Clinical Pharmacology, Saint Petersburg State Chemical Pharmaceutical University, 197022 St. Petersburg, Russia;
- N.P. Bechtereva Institute of the Human Brain of the Russian Academy of Sciences, 197376 St. Petersburg, Russia
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia; (V.P.); (D.C.); (Y.S.); (N.Z.)
- Correspondence:
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Popugaeva E, Bezprozvanny I, Chernyuk D. Reversal of Calcium Dysregulation as Potential Approach for Treating Alzheimer's Disease. Curr Alzheimer Res 2020; 17:344-354. [PMID: 32469698 PMCID: PMC8210816 DOI: 10.2174/1567205017666200528162046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 02/25/2020] [Accepted: 05/11/2020] [Indexed: 02/07/2023]
Abstract
Despite decades of research and effort, there is still no effective disease-modifying treatment for Alzheimer's Disease (AD). Most of the recent AD clinical trials were targeting amyloid pathway, but all these trials failed. Although amyloid pathology is a hallmark and defining feature of AD, targeting the amyloid pathway has been very challenging due to low efficacy and serious side effects. Alternative approaches or mechanisms for our understanding of the major cause of memory loss in AD need to be considered as potential therapeutic targets. Increasing studies suggest that Ca2+ dysregulation in AD plays an important role in AD pathology and is associated with other AD abnormalities, such as excessive inflammation, increased ROS, impaired autophagy, neurodegeneration, synapse, and cognitive dysfunction. Ca2+ dysregulation in cytosolic space, Endoplasmic Reticulum (ER) and mitochondria have been reported in the context of various AD models. Drugs or strategies, to correct the Ca2+ dysregulation in AD, have been demonstrated to be promising as an approach for the treatment of AD in preclinical models. This review will discuss the mechanisms of Ca2+ dysregulation in AD and associated pathology and discuss potential approaches or strategies to develop novel drugs for the treatment of AD by targeting Ca2+ dysregulation.
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Affiliation(s)
- Elena Popugaeva
- Department of Medical Physics, Laboratory of Molecular Neurodegeneration, Peter the Great St Petersburg Polytechnic University, St Petersburg, Russia
| | - Ilya Bezprozvanny
- Department of Physiology, UT Southwestern Medical Center, Dallas, USA
| | - Daria Chernyuk
- Department of Medical Physics, Laboratory of Molecular Neurodegeneration, Peter the Great St Petersburg Polytechnic University, St Petersburg, Russia
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Chernyuk D, Zernov N, Kabirova M, Bezprozvanny I, Popugaeva E. Antagonist of neuronal store-operated calcium entry exerts beneficial effects in neurons expressing PSEN1ΔE9 mutant linked to familial Alzheimer disease. Neuroscience 2019; 410:118-127. [PMID: 31055008 DOI: 10.1016/j.neuroscience.2019.04.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 12/13/2022]
Abstract
Alzheimer's disease (AD) is the neurodegenerative disorder with no cure. Recent studies suggest that dysregulated postsynaptic store-operated calcium entry (nSOCE) may underlie mushroom spine loss that is related to AD pathology. In the present study we observed that PSEN1ΔE9 familial AD (FAD) mutation causes mushroom spine loss in hippocampal neuronal cultures. We also demonstrated that amplitude of TRPC6-mediated nSOCE is increased in PSEN1ΔE9-expressing neurons and we suggested that inhibition of nSOCE may help to rescue synaptic defects in this model. We further established that nSOCE antagonist EVP4593 decreases PSEN1ΔE9-mediated nSOCE upregulation and rescues mushroom spines in PSEN1ΔE9-expressing neurons. Obtained results further highlight the connection between dysregulation of endoplasmic reticulum calcium signaling and synaptic loss in AD and suggest that calcium signaling modulators may have a therapeutic value for treatment of memory loss in AD.
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Affiliation(s)
- Daria Chernyuk
- Peter the Great St. Petersburg Polytechnic University, Department of Medical Physics, Laboratory of Molecular Neurodegeneration, St Petersburg, Russia
| | - Nikita Zernov
- Peter the Great St. Petersburg Polytechnic University, Department of Medical Physics, Laboratory of Molecular Neurodegeneration, St Petersburg, Russia
| | - Marina Kabirova
- Peter the Great St. Petersburg Polytechnic University, Department of Medical Physics, Laboratory of Molecular Neurodegeneration, St Petersburg, Russia
| | - Ilya Bezprozvanny
- Peter the Great St. Petersburg Polytechnic University, Department of Medical Physics, Laboratory of Molecular Neurodegeneration, St Petersburg, Russia; UT Southwestern Medical Center, Department of Physiology, Dallas, USA.
| | - Elena Popugaeva
- Peter the Great St. Petersburg Polytechnic University, Department of Medical Physics, Laboratory of Molecular Neurodegeneration, St Petersburg, Russia.
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Popugaeva E, Chernyuk D, Zhang H, Postnikova TY, Pats K, Fedorova E, Poroikov V, Zaitsev AV, Bezprozvanny I. Derivatives of Piperazines as Potential Therapeutic Agents for Alzheimer's Disease. Mol Pharmacol 2019; 95:337-348. [PMID: 30696719 DOI: 10.1124/mol.118.114348] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 01/06/2019] [Indexed: 11/22/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that is the major cause of dementia in the elderly. There is no cure against AD. We have recently discovered a novel transient receptor potential canonical 6 (TRPC6)-mediated intracellular signaling pathway that regulates the stability of dendritic spines and plays a role in memory formation. We have previously shown that TRPC6 agonists exert beneficial effects in models of AD and may serve as lead compounds for development of AD therapeutic agents. In the current study, we used the Clarivate Analytics Integrity database to search for additional TRPC6 agonists. We selected four compounds to study as potential neuroprotective agents. We applied bioinformatics analyses to test the basic pharmacological properties of the selected compounds. We performed in vitro screening of these compounds to validate their ability to protect mushroom spines from amyloid toxicity and determined that two of these compounds exert neuroprotective effects in the nanomolar concentration range. We have chosen one of these compounds [piperazine (PPZ)] for further testing. In agreement with previously published data, we have shown that PPZ potentiates TRPC6 channels. We demonstrated that the neuroprotective mechanism of the investigated PPZ is based on activation of neuronal store-operated calcium entry in spines. We have shown that PPZ restores long-term potentiation induction in 6-month-old 5xFAD mouse hippocampal slices. The obtained results suggest that PPZ and its derivatives are potential lead molecules for development of AD therapeutic agents.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Daria Chernyuk
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Hua Zhang
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Tatyana Y Postnikova
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Karina Pats
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Elena Fedorova
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Vladimir Poroikov
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Aleksey V Zaitsev
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation (E.P., D.C., I.B.); Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas (H.Z., I.B.); Laboratory of Molecular Mechanisms of Neural Interactions, Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, St. Petersburg, Russian Federation (T.Y.P., A.V.Z.); VVS Laboratory Inc., Ulica Dostoevskogo 44, St. Petersburg, Russian Federation (K.P., E.F.); Institute of Biomedical Chemistry, Moscow, Russian Federation (V.P.)
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Abstract
SIGNIFICANCE Calcium (Ca2+) hypothesis of Alzheimer's disease (AD) gains popularity. It points to new signaling pathways that may underlie AD pathogenesis. Based on calcium hypothesis, novel targets for the development of potential AD therapies are identified. Recent Advances: Recently, the key role of neuronal store-operated calcium entry (nSOCE) in the development of AD has been described. Correct regulation of nSOCE is necessary for the stability of postsynaptic contacts to preserve the memory formation. Molecular identity of hippocampal nSOCE is defined. Perspective nSOCE-activating molecule, prototype of future anti-AD drugs, is described. CRITICAL ISSUES Endoplasmic reticulum Ca2+ overload happens in many but not in all AD models. The nSOCE targeting therapy described in this review may not be universally applicable. FUTURE DIRECTIONS There is a need to determine whether AD is a syndrome with one critical signaling pathway that initiates pathology, or it is a disorder with many different signaling pathways that are disrupted simultaneously or one after each other. It is necessary to validate applicability of nSOCE-activating therapy for the development of anti-AD medication. There is an experimental correlation between downregulated nSOCE and disrupted postsynaptic contacts in AD mouse models. Signaling mechanisms downstream of nSOCE which are responsible for the regulation of stability of postsynaptic contacts have to be discovered. That will bring new targets for the development of AD-preventing therapies. Antioxid. Redox Signal. 29, 1176-1188.
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Affiliation(s)
- Elena Popugaeva
- 1 Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University , St.Petersburg, Russian Federation
| | - Ekaterina Pchitskaya
- 1 Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University , St.Petersburg, Russian Federation
| | - Ilya Bezprozvanny
- 1 Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University , St.Petersburg, Russian Federation.,2 Department of Physiology, UT Southwestern Medical Center at Dallas , Dallas, Texas
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Pchitskaya E, Popugaeva E, Bezprozvanny I. Calcium signaling and molecular mechanisms underlying neurodegenerative diseases. Cell Calcium 2018; 70:87-94. [PMID: 28728834 PMCID: PMC5748019 DOI: 10.1016/j.ceca.2017.06.008] [Citation(s) in RCA: 199] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 06/22/2017] [Accepted: 06/22/2017] [Indexed: 01/23/2023]
Abstract
Calcium (Ca2+) is a ubiquitous second messenger that regulates various activities in eukaryotic cells. Especially important role calcium plays in excitable cells. Neurons require extremely precise spatial-temporal control of calcium-dependent processes because they regulate such vital functions as synaptic plasticity. Recent evidence indicates that neuronal calcium signaling is abnormal in many of neurodegenerative disorders such as Alzheimer's disease (AD), Huntington's disease (HD) and Parkinson's disease (PD). These diseases represent a major medical, social, financial and scientific problem, but despite enormous research efforts, they are still incurable and only symptomatic relief drugs are available. Thus, new approaches and targets are needed. This review highlight neuronal calcium-signaling abnormalities in these diseases, with particular emphasis on the role of neuronal store-operated Ca2+ entry (SOCE) pathway and its potential relevance as a therapeutic target for treatment of neurodegeneration.
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Affiliation(s)
- Ekaterina Pchitskaya
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter The Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter The Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter The Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation; Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX, USA.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St Petersburg Polytechnic University, St Petersburg, 195251, Russia
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St Petersburg Polytechnic University, St Petersburg, 195251, Russia.,Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
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Pchitskaya E, Kraskovskaya N, Chernyuk D, Popugaeva E, Zhang H, Vlasova O, Bezprozvanny I. Stim2-Eb3 Association and Morphology of Dendritic Spines in Hippocampal Neurons. Sci Rep 2017; 7:17625. [PMID: 29247211 PMCID: PMC5732248 DOI: 10.1038/s41598-017-17762-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 11/30/2017] [Indexed: 01/14/2023] Open
Abstract
Mushroom spines form strong synaptic contacts and are essential for memory storage. We have previously demonstrated that neuronal store-operated calcium entry (nSOC) in hippocampal neurons is regulated by STIM2 protein. This pathway plays a key role in stability of mushroom spines and is compromised in different mice models of Alzheimer's disease (AD). Actin was thought to be the sole cytoskeleton compartment presented in dendritic spines, however, recent studies demonstrated that dynamic microtubules with EB3 capped plus-ends transiently enter spines. We showed that STIM2 forms an endoplasmic reticulum (ER) Ca2+ -dependent complex with EB3 via Ser-x-Ile-Pro aminoacid motif and that disruption of STIM2-EB3 interaction resulted in loss of mushroom spines in hippocampal neurons. Overexpression of EB3 causes increase of mushroom spines fraction and is able to restore their deficiency in hippocampal neurons obtained from PS1-M146V-KI AD mouse model. STIM2 overexpression failed to restore mushroom dendritic spines after EB3 knockdown, while in contrast EB3 overexpression rescued loss of mushroom spines resulting from STIM2 depletion. We propose that EB3 is involved in regulation of dendritic spines morphology, in part due to its association with STIM2, and that modulation of EB3 expression is a potential way to overcome synaptic loss during AD.
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Affiliation(s)
- Ekaterina Pchitskaya
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
| | - Nina Kraskovskaya
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
| | - Daria Chernyuk
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
| | - Hua Zhang
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA
| | - Olga Vlasova
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation. .,Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA.
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Popugaeva E, Pchitskaya E, Bezprozvanny I. Dysregulation of neuronal calcium homeostasis in Alzheimer's disease - A therapeutic opportunity? Biochem Biophys Res Commun 2016; 483:998-1004. [PMID: 27641664 DOI: 10.1016/j.bbrc.2016.09.053] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [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: 09/06/2016] [Accepted: 09/12/2016] [Indexed: 10/21/2022]
Abstract
Alzheimer's disease (AD) is the disease of lost memories. Synaptic loss is a major reason for memory defects in AD. Signaling pathways involved in memory loss in AD are under intense investigation. The role of deranged neuronal calcium (Ca2+) signaling in synaptic loss in AD is described in this review. Familial AD (FAD) mutations in presenilins are linked directly with synaptic Ca2+ signaling abnormalities, most likely by affecting endoplasmic reticulum (ER) Ca2+ leak function of presenilins. Excessive ER Ca2+ release via type 2 ryanodine receptors (RyanR2) is observed in AD spines due to increase in expression and function of RyanR2. Store-operated Ca2+ entry (nSOC) pathway is disrupted in AD spines due to downregulation of STIM2 protein. Because of these Ca2+ signaling abnormalities, a balance in activities of Ca2+-calmodulin-dependent kinase II (CaMKII) and Ca2+-dependent phosphatase calcineurin (CaN) is shifted at the synapse, tilting a balance between long-term potentiation (LTP) and long-term depression (LTD) synaptic mechanisms. As a result, synapses are weakened and eliminated in AD brains by LTD mechanism, causing memory loss. Targeting synaptic calcium signaling pathways offers opportunity for development of AD therapeutic agents.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Ekaterina Pchitskaya
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation; Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX, USA.
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Zhang H, Liu J, Sun S, Pchitskaya E, Popugaeva E, Bezprozvanny I. Calcium signaling, excitability, and synaptic plasticity defects in a mouse model of Alzheimer's disease. J Alzheimers Dis 2016; 45:561-80. [PMID: 25589721 DOI: 10.3233/jad-142427] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Alzheimer's disease (AD) and aging result in impaired ability to store memories, but the cellular mechanisms responsible for these defects are poorly understood. Presenilin 1 (PS1) mutations are responsible for many early-onset familial AD (FAD) cases. The phenomenon of hippocampal long-term potentiation (LTP) is widely used in studies of memory formation and storage. Recent data revealed long-term LTP maintenance (L-LTP) is impaired in PS1-M146V knock-in (KI) FAD mice. To understand the basis for this phenomenon, in the present study we analyzed structural synaptic plasticity in hippocampal cultures from wild type (WT) and KI mice. We discovered that exposure to picrotoxin induces formation of mushroom spines in both WT and KI cultures, but the maintenance of mushroom spines is impaired in KI neurons. This maintenance defect can be explained by an abnormal firing pattern during the consolidation phase of structural plasticity in KI neurons. Reduced frequency of neuronal firing in KI neurons is caused by enhanced calcium-induced calcium release (CICR), enhanced activity of calcium-activated potassium channels, and increased afterhyperpolarization. As a result, "consolidation" pattern of neuronal activity converted to "depotentiation" pattern of neuronal activity in KI neurons. Consistent with this model, we demonstrated that pharmacological inhibitors of CICR (dantrolene), of calcium-activated potassium channels (apamin), and of calcium-dependent phosphatase calcineurin (FK506) are able to rescue structural plasticity defects in KI neurons. Furthermore, we demonstrate that incubation with dantrolene or apamin also rescued L-LTP defects in KI hippocampal slices, suggesting a role for a similar mechanism. This proposed mechanism may be responsible for memory defects in AD but also for age-related memory decline.
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Affiliation(s)
- Hua Zhang
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jie Liu
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Suya Sun
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ekaterina Pchitskaya
- Laboratory of Molecular Neurodegeneration, St Petersburg State Polytechnical University, St Petersburg, Russia
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, St Petersburg State Polytechnical University, St Petersburg, Russia
| | - Ilya Bezprozvanny
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA Laboratory of Molecular Neurodegeneration, St Petersburg State Polytechnical University, St Petersburg, Russia
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Popugaeva E, Pchitskaya E, Zhang H, Vlasova O, Bezprozvanny I. Investigation of low amyloid level toxicity effects on the function of hippocampal neurons. Open Life Sci 2015. [DOI: 10.1515/biol-2015-0045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractAlzheimer disease (AD) is responsible for the
majority of elderly dementia cases. There are multiple
mouse models of AD, however, none of them completely
recapitulate human pathology. Moreover, it is even more
difficult to imitate the onset of the disease in experimental
models. In the current study we analyzed the influence of
low amyloid level toxicity on the function of hippocampal
neurons. Our assay is based on use of synthetic oligomeric
amyloid beta peptides. These peptides were added to
primary hippocampal cultures at a physiological nanomolar
range to mimic early AD. Calcium imaging was used to
evaluate the functionality of the assay. A low amyloid level
toxicity assay could be useful for fundamental research as
well as for testing newly developed AD drugs.
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Affiliation(s)
- Elena Popugaeva
- 1Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Polytehnicheskaya 29, Saint Petersburg, 195251, Russian Federation
| | - Ekaterina Pchitskaya
- 1Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Polytehnicheskaya 29, Saint Petersburg, 195251, Russian Federation
| | - Hua Zhang
- 2Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, 75390-9040, Texas, USA
| | - Olga Vlasova
- 1Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Polytehnicheskaya 29, Saint Petersburg, 195251, Russian Federation
| | - Ilya Bezprozvanny
- 2Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, 75390-9040, Texas, USA
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Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that primarily compromises memory formation and storage. Several hypotheses regarding the pathogenesis of AD have been proposed; however, no cure is available to date. Here we describe the calcium hypothesis of AD, which is gaining popularity. We present data supporting this hypothesis and focus on a recently discovered calcium-signaling pathway that is dysregulated in AD and propose targets for the development of disease-modifying therapies.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St Petersburg Polytechnic University, St Petersburg, Russian Federation
| | - Olga L Vlasova
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St Petersburg Polytechnic University, St Petersburg, Russian Federation
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St Petersburg Polytechnic University, St Petersburg, Russian Federation.,Department of Physiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
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Popugaeva E, Pchitskaya E, Speshilova A, Alexandrov S, Zhang H, Vlasova O, Bezprozvanny I. STIM2 protects hippocampal mushroom spines from amyloid synaptotoxicity. Mol Neurodegener 2015; 10:37. [PMID: 26275606 PMCID: PMC4536802 DOI: 10.1186/s13024-015-0034-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 08/10/2015] [Indexed: 11/28/2022] Open
Abstract
Background Alzheimer disease (AD) is a disease of lost memories. Mushroom postsynaptic spines play a key role in memory storage, and loss of mushroom spines has been proposed to be linked to memory loss in AD. Generation of amyloidogenic peptides and accumulation of amyloid plaques is one of the pathological hallmarks of AD. It is important to evaluate effects of amyloid on stability of mushroom spines. Results In this study we used in vitro and in vivo models of amyloid synaptotoxicity to investigate effects of amyloid peptides on hippocampal mushroom spines. We discovered that application of Aβ42 oligomers to hippocampal cultures or injection of Aβ42 oligomers directly into hippocampal region resulted in reduction of mushroom spines and activity of synaptic calcium-calmodulin-dependent kinase II (CaMKII). We further discovered that expression of STIM2 protein rescued CaMKII activity and protected mushroom spines from amyloid toxicity in vitro and in vivo. Conclusions Obtained results suggest that downregulation of STIM2-dependent stability of mushroom spines and reduction in activity of synaptic CaMKII is a mechanism of hippocampal synaptic loss in AD model of amyloid synaptotoxicity and that modulators/activators of this pathway may have a potential therapeutic value for treatment of AD. Electronic supplementary material The online version of this article (doi:10.1186/s13024-015-0034-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Ekaterina Pchitskaya
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Anastasiya Speshilova
- Laboratory of Microscopy and Microanalysis, Department of Physics-chemistry and Microsystem Technique, Institute of Metallurgy, Mechanical Engineering and Transport, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Sergey Alexandrov
- Laboratory of Microscopy and Microanalysis, Department of Physics-chemistry and Microsystem Technique, Institute of Metallurgy, Mechanical Engineering and Transport, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Hua Zhang
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA.
| | - Olga Vlasova
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russian Federation.
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russian Federation. .,Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA.
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18
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Liu J, Supnet C, Sun S, Zhang H, Good L, Popugaeva E, Bezprozvanny I. The role of ryanodine receptor type 3 in a mouse model of Alzheimer disease. Channels (Austin) 2015; 8:230-42. [PMID: 24476841 PMCID: PMC4203752 DOI: 10.4161/chan.27471] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Dysregulated endoplasmic reticulum (ER) calcium (Ca2+) signaling is reported to play an important role in Alzheimer disease (AD) pathogenesis. The role of ER Ca2+ release channels, the ryanodine receptors (RyanRs), has been extensively studied in AD models and RyanR expression and activity are upregulated in the brains of various familial AD (FAD) models. The objective of this study was to utilize a genetic approach to evaluate the importance of RyanR type 3 (RyanR3) in the context of AD pathology.
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Egorova P, Popugaeva E, Bezprozvanny I. Disturbed calcium signaling in spinocerebellar ataxias and Alzheimer's disease. Semin Cell Dev Biol 2015; 40:127-33. [PMID: 25846864 DOI: 10.1016/j.semcdb.2015.03.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [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: 02/16/2015] [Revised: 03/03/2015] [Accepted: 03/10/2015] [Indexed: 02/07/2023]
Abstract
Neurodegenerative disorders, such as spinocerebellar ataxias (SCAs) and Alzheimer's disease (AD) represent a huge scientific and medical question, but the molecular mechanisms of these diseases are still not clear. There is increasing evidence that neuronal calcium signaling is abnormal in many neurodegenerative disorders. Abnormal neuronal calcium release from the endoplasmic reticulum may result in disturbances of cell homeostasis, synaptic dysfunction, and eventual cell death. Neuronal loss is observed in most cases of neurodegenerative diseases. Recent experimental evidence supporting the role of neuronal calcium signaling in the pathogenesis of SCAs and AD is discussed in this review.
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Affiliation(s)
- Polina Egorova
- Laboratory of Molecular Neurodegeneration, St. Petersburg State Polytechnical University, St. Petersburg, Russia
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, St. Petersburg State Polytechnical University, St. Petersburg, Russia
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, St. Petersburg State Polytechnical University, St. Petersburg, Russia; Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA.
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20
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Popugaeva E, Bezprozvanny I. Commentary on "Synaptic function is modulated by LRRK2 and glutamate release is increased in cortical neurons of G2019S LRRK2 knock-in mice". Front Cell Neurosci 2014; 8:351. [PMID: 25389389 PMCID: PMC4211405 DOI: 10.3389/fncel.2014.00351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 10/07/2014] [Indexed: 11/25/2022] Open
Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Meurodegeneration, Department of Medical Physics, St. Petersburg State Polytechnical University St. Petersburg, Russia
| | - Ilya Bezprozvanny
- Laboratory of Molecular Meurodegeneration, Department of Medical Physics, St. Petersburg State Polytechnical University St. Petersburg, Russia ; Department of Physiology, UT Southwestern Medical Center at Dallas Dallas, TX, USA
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21
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Sun S, Zhang H, Liu J, Popugaeva E, Xu NJ, Feske S, White CL, Bezprozvanny I. Reduced synaptic STIM2 expression and impaired store-operated calcium entry cause destabilization of mature spines in mutant presenilin mice. Neuron 2014; 82:79-93. [PMID: 24698269 DOI: 10.1016/j.neuron.2014.02.019] [Citation(s) in RCA: 204] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2014] [Indexed: 12/14/2022]
Abstract
Mushroom dendritic spine structures are essential for memory storage, and the loss of mushroom spines may explain memory defects in Alzheimer's disease (AD). Here we show a significant reduction in the fraction of mushroom spines in hippocampal neurons from the presenilin-1 M146V knockin (KI) mouse model of familial AD (FAD). The stabilization of mushroom spines depends on STIM2-mediated neuronal store-operated calcium influx (nSOC) and continuous activity of Ca(2+)/calmodulin-dependent protein kinase II (CaMKII). We demonstrate that STIM2-nSOC-CaMKII pathway is compromised in KI neurons, in aging neurons, and in sporadic AD brains due to downregulation of STIM2 protein. We further establish that overexpression of STIM2 rescues synaptic nSOC, CaMKII activity, and mushroom spine loss in KI neurons. Our results identify STIM2-nSOC-CaMKII synaptic maintenance pathway as a novel potential therapeutic target for treatment of AD and age-related memory decline.
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Affiliation(s)
- Suya Sun
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Hua Zhang
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Jie Liu
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Saint Petersburg State Polytechnical University, Saint Petersburg, 195251, Russia
| | - Nan-Jie Xu
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Stefan Feske
- Department of Pathology, New York University Langone Medical Center, New York, NY 10016, USA
| | - Charles L White
- Department of Pathology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Ilya Bezprozvanny
- Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA; Laboratory of Molecular Neurodegeneration, Saint Petersburg State Polytechnical University, Saint Petersburg, 195251, Russia.
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22
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Fedorenko OA, Popugaeva E, Enomoto M, Stathopulos PB, Ikura M, Bezprozvanny I. Intracellular calcium channels: inositol-1,4,5-trisphosphate receptors. Eur J Pharmacol 2013; 739:39-48. [PMID: 24300389 DOI: 10.1016/j.ejphar.2013.10.074] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [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: 09/17/2013] [Revised: 09/28/2013] [Accepted: 10/17/2013] [Indexed: 01/13/2023]
Abstract
The inositol-1,4,5-trisphosphate receptors (InsP3Rs) are the major intracellular Ca(2+)-release channels in cells. Activity of InsP3Rs is essential for elementary and global Ca(2+) events in the cell. There are three InsP3Rs isoforms that are present in mammalian cells. In this review we will focus primarily on InsP3R type 1. The InsP3R1 is a predominant isoform in neurons and it is the most extensively studied isoform. Combination of biophysical and structural methods revealed key mechanisms of InsP3R function and modulation. Cell biological and biochemical studies lead to identification of a large number of InsP3R-binding proteins. InsP3Rs are involved in the regulation of numerous physiological processes, including learning and memory, proliferation, differentiation, development and cell death. Malfunction of InsP3R1 play a role in a number of neurodegenerative disorders and other disease states. InsP3Rs represent a potentially valuable drug target for treatment of these disorders and for modulating activity of neurons and other cells. Future studies will provide better understanding of physiological functions of InsP3Rs in health and disease.
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Affiliation(s)
- Olena A Fedorenko
- Department of Brain Physiology, Bogomoletz Institute of Physiology, 01024 Kiev, Ukraine; State Key Laboratory of Molecular and Cellular Biology, 01024 Kiev, Ukraine
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, St. Petersburg State Polytechnical University, 195251 St. Petersburg, Russia
| | - Masahiro Enomoto
- Princess Margaret Cancer Centre, Department of Medical Biophysics, University of Toronto, M5G1L7 Toronto, Ontario, Canada
| | - Peter B Stathopulos
- Princess Margaret Cancer Centre, Department of Medical Biophysics, University of Toronto, M5G1L7 Toronto, Ontario, Canada
| | - Mitsuhiko Ikura
- Princess Margaret Cancer Centre, Department of Medical Biophysics, University of Toronto, M5G1L7 Toronto, Ontario, Canada
| | - Ilya Bezprozvanny
- Laboratory of Molecular Neurodegeneration, Department of Medical Physics, St. Petersburg State Polytechnical University, 195251 St. Petersburg, Russia; Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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Popugaeva E, Bezprozvanny I. Can the calcium hypothesis explain synaptic loss in Alzheimer's disease? NEURODEGENER DIS 2013; 13:139-41. [PMID: 24080896 DOI: 10.1159/000354778] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 08/01/2013] [Indexed: 11/19/2022] Open
Abstract
Alzheimer's disease (AD) is the threat of modern humankind that is provoked by increased human lifespan. Despite extensive studies on AD pathology for more than 100 years, there are no disease-preventing therapies. Growing evidence suggests the role of calcium (Ca2+) in the pathogenesis of AD. The main purpose of the article is to understand whether modern science is able to explain the synapse loss observed in early AD and discuss the role of Ca2+ hypothesis in it. Based on results obtained in our laboratory and others, we propose that familial AD-associated mutations in presenilins cause a Ca2+ overload of endoplasmic reticulum stores which leads to compensatory downregulation of the neuronal store-operated Ca2+ (nSOC) entry pathway. We propose that synaptic nSOC is necessary for the stability of mature synaptic spines and that dysfunction of this pathway may play an important role in synaptic and memory loss in AD.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, St. Petersburg State Polytechnical University, St. Petersburg, Russia
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24
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Popugaeva E, Bezprozvanny I. Role of endoplasmic reticulum Ca2+ signaling in the pathogenesis of Alzheimer disease. Front Mol Neurosci 2013; 6:29. [PMID: 24065882 PMCID: PMC3776136 DOI: 10.3389/fnmol.2013.00029] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 08/30/2013] [Indexed: 01/24/2023] Open
Abstract
Alzheimer disease (AD) is a major threat of twenty-first century that is responsible for the majority of dementia in the elderly. Development of effective AD-preventing therapies are the top priority tasks for neuroscience research. Amyloid hypothesis of AD is a dominant idea in the field, but so far all amyloid-targeting therapies have failed in clinical trials. In addition to amyloid accumulation, there are consistent reports of abnormal calcium signaling in AD neurons. AD neurons exhibit enhanced intracellular calcium (Ca2+) liberation from the endoplasmic reticulum (ER) and reduced store-operated Ca2+ entry (SOC). These changes occur primarily as a result of ER Ca2+ overload. We argue that normalization of intracellular Ca2+ homeostasis could be a strategy for development of effective disease-modifying therapies. The current review summarizes recent data about changes in ER Ca2+ signaling in AD. Ca2+ channels that are discussed in the current review include: inositol trisphosphate receptors, ryanodine receptors, presenilins as ER Ca2+ leak channels, and neuronal SOC channels. We discuss how function of these channels is altered in AD and how important are resulting Ca2+ signaling changes for AD pathogenesis.
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Affiliation(s)
- Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, Saint Petersburg State Polytechnical University Saint Petersburg, Russia
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Luo Y, Vali S, Sun S, Chen X, Liang X, Drozhzhina T, Popugaeva E, Bezprozvanny I. Aβ42-binding peptoids as amyloid aggregation inhibitors and detection ligands. ACS Chem Neurosci 2013; 4:952-62. [PMID: 23427915 DOI: 10.1021/cn400011f] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Alzheimer's disease (AD) is the most common form of dementia and currently affects 5.4 million Americans. A number of anti-Aβ (beta amyloid) therapeutic agents have been developed for AD, but so far all of them failed in clinic. Here we used peptoid chemistry to develop ligands selective for Aβ42. Peptoids are N-substituted glycine oligomers, a class of peptidomimics. We synthesized an on-bead peptoid library consisting of 38,416 unique peptoids. The generated peptoid library was screened and arrays of Aβ42-selective peptoid ligands were identified. One of those peptoid ligands, IAM1 (inhibitor of amyloid), and the dimeric form (IAM1)2 were synthesized and evaluated in a variety of biochemical assays. We discovered that IAM1 selectively binds to Aβ42, while the dimeric derivative (IAM1)2 has a higher affinity for Aβ42. Furthermore, we demonstrated that IAM1 and (IAM1)2 were able to inhibit the aggregation of Aβ42 in a concentration-dependent manner, and that (IAM1)2 protected primary hippocampal neurons from the Aβ-induced toxicity in vitro. These results suggest that IAM1 and (IAM1)2 are specific Aβ42 ligands with antiaggregation and neuroprotective properties. IAM1, (IAM1)2, and their derivatives hold promise as Aβ42 detection agents and as lead compounds for the development of AD therapeutic agents.
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Affiliation(s)
- Yuan Luo
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Sheetal Vali
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Suya Sun
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Xuesong Chen
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Xia Liang
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Tatiana Drozhzhina
- Laboratory of Molecular Neurodegeneration, State Technical University, St. Petersburg 195251,
Russia
| | - Elena Popugaeva
- Laboratory of Molecular Neurodegeneration, State Technical University, St. Petersburg 195251,
Russia
| | - Ilya Bezprozvanny
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
- Laboratory of Molecular Neurodegeneration, State Technical University, St. Petersburg 195251,
Russia
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Popugaeva E, Supnet C, Bezprozvanny I. Presenilins, Deranged Calcium Homeostasis, Synaptic Loss and Dysfunction in Alzheimer's Disease. ACTA ACUST UNITED AC 2012. [DOI: 10.1166/msr.2012.1002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Popugaeva E, Witkowski PT, Schlegel M, Ulrich RG, Auste B, Rang A, Krüger DH, Klempa B. Dobrava-Belgrade hantavirus from Germany shows receptor usage and innate immunity induction consistent with the pathogenicity of the virus in humans. PLoS One 2012; 7:e35587. [PMID: 22545121 PMCID: PMC3335829 DOI: 10.1371/journal.pone.0035587] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 03/18/2012] [Indexed: 11/18/2022] Open
Abstract
Background Dobrava-Belgrade virus (DOBV) is a European hantavirus causing hemorrhagic fever with renal syndrome (HFRS) in humans with fatality rates of up to 12%. DOBV-associated clinical cases typically occur also in the northern part of Germany where the virus is carried by the striped field mouse (Apodemus agrarius). However, the causative agent responsible for human illness has not been previously isolated. Methodology/Principal Findings Here we report on characterization of a novel cell culture isolate from Germany obtained from a lung tissue of “spillover” infected yellow necked mouse (A. flavicollis) trapped near the city of Greifswald. Phylogenetic analyses demonstrated close clustering of the new strain, designated Greifswald/Aa (GRW/Aa) with the nucleotide sequence obtained from a northern German HFRS patient. The virus was effectively blocked by specific antibodies directed against β3 integrins and Decay Accelerating Factor (DAF) indicating that the virus uses same receptors as the highly pathogenic Hantaan virus (HTNV). In addition, activation of selected innate immunity markers as interferon β and λ and antiviral protein MxA after viral infection of A549 cells was investigated and showed that the virus modulates the first-line antiviral response in a similar way as HTNV. Conclusions/Significance In summary, our study reveals novel data on DOBV receptor usage and innate immunity induction in relationship to virus pathogenicity and underlines the potency of German DOBV strains to act as human pathogen.
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Affiliation(s)
- Elena Popugaeva
- Institute of Virology, Helmut-Ruska-Haus, Charité Medical School, Berlin, Germany
| | - Peter T. Witkowski
- Institute of Virology, Helmut-Ruska-Haus, Charité Medical School, Berlin, Germany
| | - Mathias Schlegel
- Friedrich-Loeffler-Institut, Institute for Novel and Emerging Infectious Diseases, Greifswald-Insel Riems, Germany
| | - Rainer G. Ulrich
- Friedrich-Loeffler-Institut, Institute for Novel and Emerging Infectious Diseases, Greifswald-Insel Riems, Germany
| | - Brita Auste
- Institute of Virology, Helmut-Ruska-Haus, Charité Medical School, Berlin, Germany
| | - Andreas Rang
- Institute of Virology, Helmut-Ruska-Haus, Charité Medical School, Berlin, Germany
| | - Detlev H. Krüger
- Institute of Virology, Helmut-Ruska-Haus, Charité Medical School, Berlin, Germany
| | - Boris Klempa
- Institute of Virology, Helmut-Ruska-Haus, Charité Medical School, Berlin, Germany
- Institute of Virology, Slovak Academy of Sciences, Bratislava, Slovakia
- * E-mail:
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