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Zhong Q, Zou Y, Liu H, Chen T, Zheng F, Huang Y, Chen C, Zhang Z. Toll-like receptor 4 deficiency ameliorates β2-microglobulin induced age-related cognition decline due to neuroinflammation in mice. Mol Brain 2020; 13:20. [PMID: 32059688 PMCID: PMC7023753 DOI: 10.1186/s13041-020-0559-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 10/07/2019] [Accepted: 01/21/2020] [Indexed: 12/13/2022] Open
Abstract
Toll-like receptor 4 (TLR4) is a crucial receptor in neuroinflammation and apoptotic neuronal death, and increasing evidences indicated that β2-microglobulin (B2M) is thought to be a major contributor to age-related cognitive decline. In present study, we designed to investigate the effects of TLR4 on B2M-induced age-related cognitive decline. Wild-type (WT) C57BL/6, TLR4 knockout (TLR4 -KO) mice and hippocampal neurons from the two type mice were respectively divided into two groups: (1) Veh group; (2) B2M-treated group. The behavioral responses of mice were measured using Morris Water Maze. Hippocampal neurogenesis and neuronal damage, inflammatory response, apoptosis, synaptic proteins and neurotrophic factors, and TLR4/MyD88/NF-κB signaling pathway proteins were examined using molecular biological or histopathological methods. The results showed that WT mice received B2M in the DG exhibited age-related cognitive declines, increased TLR4 mRNA expression and high levels of interleukin-1β (IL-1β), tumor necrosis factor-alpha (TNF-α) and apoptotic neuronal death in the hippocampus, which were partially attenuated in TLR4-KO mice. Moreover, in absence of TLR4, B2M treatment improved hippocampus neurogenesis and increased synaptic related proteins. Our cell experiments further demonstrated that deletion of TLR4 could significantly increase synaptic related protein, decrease neuroinflammatory fators, inhibited apoptotic neuronal death, and regulated MyD88/NF-κB signal pathway after B2M treatment. In summary, our results support the TLR4 contributes to B2M-induced age-related cognitive decline due to neuroinflammation and apoptosis through TLR4/MyD88/NF-κB signaling pathway via a modulation of hippocampal neurogenesis and synaptic function. This may provide an important neuroprotective mechanism for improving age-related cognitive decline.
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Affiliation(s)
- Qi Zhong
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China
| | - Yufeng Zou
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China
| | - Hongchao Liu
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China
- Department of Anesthesiology, Maternal and Child Hospital of Hubei Province, Wuluo Road, Wuhan, 430071, Hubei, China
| | - Ting Chen
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China
| | - Feng Zheng
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China
| | - Yifei Huang
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China
| | - Chang Chen
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China.
| | - Zongze Zhang
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, East Lake Road, Wuhan, 430071, Hubei, China.
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Chen SM, Yi YL, Zeng D, Tang YY, Kang X, Zhang P, Zou W, Tang XQ. Hydrogen Sulfide Attenuates β2-Microglobulin-Induced Cognitive Dysfunction: Involving Recovery of Hippocampal Autophagic Flux. Front Behav Neurosci 2019; 13:244. [PMID: 31708756 PMCID: PMC6823620 DOI: 10.3389/fnbeh.2019.00244] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/04/2019] [Indexed: 12/31/2022] Open
Abstract
Background and Aim Accumulation of β2-microglobulin (B2M), a systemic pro-aging factor, regulates negatively cognitive function. Hydrogen sulfide (H2S), a novel gas signaling molecule, exerts protection against cognitive dysfunction. Therefore, the present work was designed to explore whether H2S attenuates cognitive dysfunction induced by B2M and the underlying mechanism. Materials and Methods The cognitive function of rats was assessed by Y-maze, Novel object recognition (NOR), and Morris water maze (MWM) tests. The levels of autophagosome and autolysosome in hippocampus were observed by transmission electron microscopy. The expression of p62 protein in hippocampus was detected by western blot analysis. Results NaHS (a donor of H2S) significantly alleviated cognitive impairments in the B2M-exposed rats tested by Y-maze test, NOR test and MWM test. Furthermore, NaHS recovered autophagic flux in the hippocampus of B2M-exposed rats, as evidenced by decreases in the ratio of autophagosome to autolysosome and the expression of p62 protein in the hippocampus. Conclusion In summary, these data indicated that H2S attenuates B2M-induced cognitive dysfunction, involving in recovery of the blocked autophagic flux in the hippocampus, and suggested that H2S may be a novel approach to prevent B2M-induced cognitive dysfunction.
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Affiliation(s)
- Si-Min Chen
- Department of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Yi-Li Yi
- Department of Neurology, The Affiliated Nanhua Hospital, University of South China, Hengyang, China
| | - Dan Zeng
- Department of Neurology, The Affiliated Nanhua Hospital, University of South China, Hengyang, China
| | - Yi-Yun Tang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China
| | - Xuan Kang
- Department of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China.,Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China
| | - Ping Zhang
- Department of Neurology, The Affiliated Nanhua Hospital, University of South China, Hengyang, China.,Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China
| | - Wei Zou
- Department of Neurology, The Affiliated Nanhua Hospital, University of South China, Hengyang, China.,Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China
| | - Xiao-Qing Tang
- Department of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China.,Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China
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Morozov AV, Karpov VL. Biological consequences of structural and functional proteasome diversity. Heliyon 2018; 4:e00894. [PMID: 30417153 PMCID: PMC6218844 DOI: 10.1016/j.heliyon.2018.e00894] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 07/31/2018] [Revised: 09/25/2018] [Accepted: 10/24/2018] [Indexed: 12/21/2022] Open
Abstract
Cell homeostasis and regulation of metabolic pathways are ensured by synthesis, proper folding and efficient degradation of a vast amount of proteins. Ubiquitin-proteasome system (UPS) degrades most intracellular proteins and thus, participates in regulation of cellular metabolism. Within the UPS, proteasomes are the elements that perform substrate cleavage. However, the proteasomes in the organism are diverse. Structurally different proteasomes are present not only in different types of cells, but also in a single cell. The reason for proteasome heterogeneity is not fully understood. This review briefly encompasses mammalian proteasome structure and function, and discusses biological relevance of proteasome diversity for a range of important cellular functions including internal and external signaling.
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Affiliation(s)
- Alexey V Morozov
- W.A. Engelhardt Institute of Molecular Biology, RAS, 119991, Moscow, Russia
| | - Vadim L Karpov
- W.A. Engelhardt Institute of Molecular Biology, RAS, 119991, Moscow, Russia
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Astakhova TM, Ivanova EV, Rodoman GV, Sumedi IR, Afanas’ev SG, Goncharov AL, Kondakova IV, Sharova NP. Effect of Neoadjuvant Chemoradiation Therapy on Proteasome Pool in Rectal Cancer. Bull Exp Biol Med 2017; 164:191-4. [PMID: 29181665 DOI: 10.1007/s10517-017-3955-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Indexed: 12/22/2022]
Abstract
In untreated rectal cancer patients, the chymotrypsin-like activity of proteasomes in tumor tissue was 3-fold higher than that in conventionally normal tissue, which is explained by up-regulation of expression of immunoproteasomes and total pool of proteasomes. After neoadjuvant chemoradiation therapy, expressions of the total pool of proteasomes and immunoproteasomes in the tumor as well as the relative ratios of these indices to those in conventionally normal tissue were smaller by 1.4-3.3 times in comparison with the untreated patients. These changes were paralleled with pronounced (4.5-fold) down-regulation of proteasome activity in the tumor and a 3.7-fold decrease of activity ratio for the proteasomes in tumor and in conventionally normal tissue. The number of immunoproteasome subunits and the chymotrypsin-like activity of proteasomes can be viewed as potential markers to prognosticate effectiveness of neoadjuvant chemoradiation therapy in rectal cancer patients.
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Erokhov PA, Lyupina YV, Radchenko AS, Kolacheva AA, Nikishina YO, Sharova NP. Detection of active proteasome structures in brain extracts: proteasome features of August rat brain with violations in monoamine metabolism. Oncotarget 2017; 8:70941-70957. [PMID: 29050334 PMCID: PMC5642609 DOI: 10.18632/oncotarget.20208] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 05/26/2017] [Accepted: 07/23/2017] [Indexed: 12/15/2022] Open
Abstract
The aim of this work was to detect changes in proteasome pools of brain parts of August rats with monoamine metabolism violations in comparison with that of control Wistar rats. To reveal active proteasome structures, a method of native electrophoresis for the analysis of crude tissue fractions was developed. By means of this method and following Western blotting, the most pronounced changes in reorganization of proteasome structures were detected in proteasome pool of the brain cortex of August rats. Main findings are the enhanced expression of immune proteasome subtypes containing proteolytic subunit LMP2 and activator PA28αβ as well as immune proteasome subtypes containing proteolytic subunit LMP7 and activator PA700 and simultaneously decreased expression of subtypes with subunit LMP2 and activator PA700 in the brain cortex of August rats compared to that of Wistar rats. These results were indirectly confirmed by SDS PAGE method followed by Western blotting, which showed the increased quantities of immune subunits and proteasome activators in the brain cortex of August rats compared to that of Wistar rats. Immune proteasomes were revealed by immunohistochemistry in neurons, but not in glial cells of August and Wistar rat cortex. The detected reorganization of proteasome pools is likely to be important for production of special peptides to provide the steady interaction between neurons and adaptation of central nervous system to conditions caused by monoamine metabolism deviations.
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Affiliation(s)
- Pavel A. Erokhov
- Laboratory of Biochemistry of Ontogenesis Processes, N.K. Koltsov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
| | - Yulia V. Lyupina
- Laboratory of Biochemistry of Ontogenesis Processes, N.K. Koltsov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
| | - Alexandra S. Radchenko
- Laboratory of Biochemistry of Ontogenesis Processes, N.K. Koltsov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
| | - Anna A. Kolacheva
- Laboratory of Neural and Neuroendocrine Regulations, N.K. Koltsov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
| | - Yulia O. Nikishina
- Laboratory of Neural and Neuroendocrine Regulations, N.K. Koltsov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
| | - Natalia P. Sharova
- Laboratory of Biochemistry of Ontogenesis Processes, N.K. Koltsov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
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Morozov AV, Astakhova TM, Garbuz DG, Krasnov GS, Bobkova NV, Zatsepina OG, Karpov VL, Evgen'ev MB. Interplay between recombinant Hsp70 and proteasomes: proteasome activity modulation and ubiquitin-independent cleavage of Hsp70. Cell Stress Chaperones 2017; 22:687-697. [PMID: 28447215 PMCID: PMC5573687 DOI: 10.1007/s12192-017-0792-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 12/15/2016] [Revised: 03/08/2017] [Accepted: 03/20/2017] [Indexed: 12/15/2022] Open
Abstract
The heat shock protein 70 (Hsp70, human HSPA1A) plays indispensable roles in cellular stress responses and protein quality control (PQC). In the framework of PQC, it cooperates with the ubiquitin-proteasome system (UPS) to clear damaged and dysfunctional proteins in the cell. Moreover, Hsp70 itself is rapidly degraded following the recovery from stress. It was demonstrated that its fast turnover is mediated via ubiquitination and subsequent degradation by the 26S proteasome. At the same time, the effect of Hsp70 on the functional state of proteasomes has been insufficiently investigated. Here, we characterized the direct effect of recombinant Hsp70 on the activity of 20S and 26S proteasomes and studied Hsp70 degradation by the 20S proteasome in vitro. We have shown that the activity of purified 20S proteasomes is decreased following incubation with recombinant human Hsp70. On the other hand, high concentrations of Hsp70 activated 26S proteasomes. Finally, we obtained evidence that in addition to previously reported ubiquitin-dependent degradation, Hsp70 could be cleaved independent of ubiquitination by the 20S proteasome. The results obtained reveal novel aspects of the interplay between Hsp70 and proteasomes.
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Affiliation(s)
- Alexey V Morozov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia.
| | - Tatiana M Astakhova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilov str. 26, Moscow, 124319, Russia
| | - David G Garbuz
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia
| | - George S Krasnov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia
| | - Natalia V Bobkova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Institutskaya st. 3, Pushchino, Moscow Region, 142290, Russia
| | - Olga G Zatsepina
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia
| | - Vadim L Karpov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia
| | - Michail B Evgen'ev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia
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Karpova YD, Bozhok GA, Alabedal’karim NM, Lyupina YV, Astakhova TM, Legach EI, Sharova NP. Proteasomes and transplantology: Current state of the problem and the search for promising trends. BIOL BULL+ 2017. [DOI: 10.1134/s1062359017030049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Abstract
Native structure of active forms of rat liver immune proteasomes has been studied by two-dimensional electrophoresis method modified for analysis of unpurified protein fractions. The developed method allowed revealing the proteasome immune subunits LMP7 and LMP2 in 20S subparticles and in the structures bound to one or two PA28αβ activators, but not to the PA700 activator, which is involved in the hydrolysis of ubiquitinated proteins. The results obtained indicate the participation of the immune proteasomes in delicate regulatory mechanisms based on the production of biologically active peptides and exclude their participation in processes of crude degradation of "rotated" ubiquitinated proteins.
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Affiliation(s)
- A A Stepanova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia
| | - Yu V Lyupina
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia
| | - N P Sharova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia.
| | - P A Erokhov
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia
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Bobkova NV, Evgen'ev M, Garbuz DG, Kulikov AM, Morozov A, Samokhin A, Velmeshev D, Medvinskaya N, Nesterova I, Pollock A, Nudler E. Exogenous Hsp70 delays senescence and improves cognitive function in aging mice. Proc Natl Acad Sci U S A 2015; 112:16006-11. [PMID: 26668376 DOI: 10.1073/pnas.1516131112] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Molecular chaperone Heat Shock Protein 70 (Hsp70) plays an important protective role in various neurodegenerative disorders often associated with aging, but its activity and availability in neuronal tissue decrease with age. Here we explored the effects of intranasal administration of exogenous recombinant human Hsp70 (eHsp70) on lifespan and neurological parameters in middle-aged and old mice. Long-term administration of eHsp70 significantly enhanced the lifespan of animals of different age groups. Behavioral assessment after 5 and 9 mo of chronic eHsp70 administration demonstrated improved learning and memory in old mice. Likewise, the investigation of locomotor and exploratory activities after eHsp70 treatment demonstrated a significant therapeutic effect of this chaperone. Measurements of synaptophysin show that eHsp70 treatment in old mice resulted in larger synaptophysin-immunopositive areas and higher neuron density compared with control animals. Furthermore, eHsp70 treatment decreased accumulation of lipofuscin, an aging-related marker, in the brain and enhanced proteasome activity. The potential of eHsp70 intranasal treatment to protect synaptic machinery in old animals offers a unique pharmacological approach for various neurodegenerative disorders associated with human aging.
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Sharova NP, Sumedi IR, Astakhova TM, Plekhanova AS, Lyupina YV, Shashova EE, Kondakova IV, Rodoman GV. Diagnostics of thyroid cancer: Limitations of the existing methods and perspectives for future developments. BIOL BULL+ 2014. [DOI: 10.1134/s1062359014040104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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