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Martin-Folgar R, González-Caballero MC, Torres-Ruiz M, Cañas-Portilla AI, de Alba González M, Liste I, Morales M. Molecular effects of polystyrene nanoplastics on human neural stem cells. PLoS One 2024; 19:e0295816. [PMID: 38170698 PMCID: PMC10763972 DOI: 10.1371/journal.pone.0295816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 11/30/2023] [Indexed: 01/05/2024] Open
Abstract
Nanoplastics (NPs) have been found in many ecological environments (aquatic, terrestrial, air). Currently, there is great concern about the exposition and impact on animal health, including humans, because of the effects of ingestion and accumulation of these nanomaterials (NMs) in aquatic organisms and their incorporation into the food chain. NPs´ mechanisms of action on humans are currently unknown. In this study, we evaluated the altered molecular mechanisms on human neural stem cell line (hNS1) after 4 days of exposure to 30 nm polystyrene (PS) NPs (0.5, 2.5 and 10 μg/mL). Our results showed that NPs can induce oxidative stress, cellular stress, DNA damage, alterations in inflammatory response, and apoptosis, which could lead to tissue damage and neurodevelopmental diseases.
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Affiliation(s)
- Raquel Martin-Folgar
- Grupo de Biología y Toxicología Ambiental, Departamento de Física Matemática y de Fluidos, Facultad de Ciencias, UNED. Urbanización Monte Rozas, Las Rozas (Madrid), Spain
| | - Mª Carmen González-Caballero
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Majadahonda (Madrid), Spain
| | - Mónica Torres-Ruiz
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Majadahonda (Madrid), Spain
| | - Ana I. Cañas-Portilla
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Majadahonda (Madrid), Spain
| | - Mercedes de Alba González
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Majadahonda (Madrid), Spain
| | - Isabel Liste
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Majadahonda (Madrid), Spain
| | - Mónica Morales
- Grupo de Biología y Toxicología Ambiental, Departamento de Física Matemática y de Fluidos, Facultad de Ciencias, UNED. Urbanización Monte Rozas, Las Rozas (Madrid), Spain
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Resolution Potential of Necrotic Cell Death Pathways. Int J Mol Sci 2022; 24:ijms24010016. [PMID: 36613458 PMCID: PMC9819908 DOI: 10.3390/ijms24010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
During tissue damage caused by infection or sterile inflammation, not only damage-associated molecular patterns (DAMPs), but also resolution-associated molecular patterns (RAMPs) can be activated. These dying cell-associated factors stimulate immune cells localized in the tissue environment and induce the production of inflammatory mediators or specialized proresolving mediators (SPMs). Within the current prospect of science, apoptotic cell death is considered the main initiator of resolution. However, more RAMPs are likely to be released during necrotic cell death than during apoptosis, similar to what has been observed for DAMPs. The inflammatory potential of many regulated forms of necrotic cell death modalities, such as pyroptosis, necroptosis, ferroptosis, netosis, and parthanatos, have been widely studied in necroinflammation, but their possible role in resolution is less considered. In this review, we aim to summarize the relationship between necrotic cell death and resolution, as well as present the current available data regarding the involvement of certain forms of regulated necrotic cell death in necroresolution.
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Emerging therapeutic roles of small heat shock protein-derived mini-chaperones and their delivery strategies. Biochimie 2022; 208:56-65. [PMID: 36521577 DOI: 10.1016/j.biochi.2022.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 11/28/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022]
Abstract
The small heat shock protein (sHsp) family is a group of proteins in which some are induced in response to external stimuli, such as environmental and pathological stresses, while others are constitutively expressed. They show chaperone-like activity, protect cells from apoptosis, and maintain cytoskeletal architecture. Short sequences or fragments ranging from approximately 19-20 residues in sHsps were shown to display chaperone activity in vitro. These sequences are termed sHsp-derived mini-peptides/mini-chaperones. These peptides offer an advantage in providing protective and therapeutic effects over full-length proteins owing to their small molecular weight and easy uptake into the cells. Research on sHsp mini-chaperone therapy has recently received attention and advanced tremendously. sHsp mini-chaperones have shown a wide range of therapeutic effects, such as anti-aggregation of proteins, anti-apoptotic, anti-inflammatory, anti-oxidant, senolytic, and anti-platelet activity. The administration of mini-chaperones into the several disease animal models, including experimental autoimmune encephalomyelitis, cataract, age-related macular degeneration, glaucoma, and thrombosis through various routes reduced symptoms or prevented the progression of the disease. However, it was found that the therapeutic potential of sHsp mini-chaperones is limited by their short turnover and enzymatic degradation in circulation. Nonetheless, carrier molecules approach such as nanoparticles, cell penetration peptides, and extracellular vesicles increased their efficacy by enhancing the uptake, retention time, protection from enzymatic degradation, and site-specific delivery without altering their biological activity. In this context, this review highlights the recent advances in the therapeutic potential of sHsp-derived mini-chaperones, their effect in experimental animal models, and approaches for increasing their efficacy.
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Du X, Luo L, Huang Q, Zhang J. Cortex metabolome and proteome analysis reveals chronic arsenic exposure via drinking water induces developmental neurotoxicity through hnRNP L mediated mitochondrial dysfunction in male rats. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 820:153325. [PMID: 35074374 DOI: 10.1016/j.scitotenv.2022.153325] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/09/2022] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Lots of people are at the risk of arsenic-contaminated drinking water. Arsenic exposure was confirmed to be closely linked to neurocognitive deficits, particularly during childhood. The multi-omics approaches are known be well suitable for toxicological research. Thus, this study aimed to explore the molecular mechanisms of arsenic-induced learning and memory function impairments through the integrative proteome and metabolome analysis of cortex in rats. The weaned rats were exposed to arsenic-contaminated drinking water for six months to mimic the developmental exposure. 220 differential proteins and 19 differential metabolites were identified in the cortex, and nine potential biomarkers were found to be related to impaired Morris water maze (MWM) indicators. Chronic arsenic exposure affected the cognitive function by inducing the overproduction of amyloid-β (Aβ) peptides and the redox imbalance in the mitochondria. Glycolysis and tricarboxylic acid (TCA) cycle enhancement driven by the increased heterogeneous nuclear ribonucleoprotein L (hnRNP L) is a low-dose protective mechanism against arsenic-induced ATP deficiency and oxidative stress. Moreover, apoptosis is another important pathway of arsenic-induced neurotoxicity. This study provides new evidence about the alterations of proteins and metabolites in the cortex of the exposed rats under arsenic toxicity. These findings suggest hnRNP L could be a potential target for the treatment of arsenic-induced neurotoxicity.
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Affiliation(s)
- Xiaoyan Du
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, China; Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, China
| | - Lianzhong Luo
- Department of Pharmacy, Xiamen Medical College, China
| | - Qingyu Huang
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, China
| | - Jie Zhang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, China.
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5
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Reddy VS, Pandarinath S, Archana M, Reddy GB. Impact of chronic hyperglycemia on Small Heat Shock Proteins in diabetic rat brain. Arch Biochem Biophys 2021; 701:108816. [PMID: 33631184 DOI: 10.1016/j.abb.2021.108816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 02/12/2021] [Accepted: 02/14/2021] [Indexed: 12/21/2022]
Abstract
Small heat shock proteins (sHsps) are a family of proteins. Some are induced in response to multiple stimuli and others are constitutively expressed. They are involved in fundamental cellular processes, including protein folding, apoptosis, and maintenance of cytoskeletal integrity. Hyperglycemia created during diabetes leads to neuronal derangements in the brain. In this study, we investigated the impact of chronic hyperglycemia on the expression of sHsps and heat shock transcription factors (HSFs), solubility and aggregation of sHsps and amyloidogenic proteins, and their role in neuronal apoptosis in a diabetic rat model. Diabetes was induced in Sprague-Dawley rats with streptozotocin and hyperglycemia was maintained for 16 weeks. Expressions of sHsps and HSFs were analyzed by qRT-PCR and immunoblotting in the cerebral cortex. Solubility of sHsps and amyloidogenic proteins, including α-synuclein and Tau, was analyzed by the detergent soluble assay. Neuronal cell death was analyzed by TUNEL staining and apoptotic markers. The interaction of sHsps with amyloidogenic proteins and Bax was assessed using co-immunoprecipitation. Hyperglycemia decreased Hsp27 and HSF1, and increased αBC, Hsp22, and HSF4 levels at transcript and protein levels. Diabetes induced the aggregation of αBC, Hsp22, α-synuclein, and pTau, as their levels were higher in the insoluble fraction. Additionally, diabetes impaired the interaction of αBC with α-synuclein and pTau. Furthermore, diabetes reduced the interaction of αBC with Bax, which may possibly contribute to neuronal apoptosis. Together, these results indicate that chronic hyperglycemia induces differential responses of sHsps by altering their expression, solubility, interaction, and roles in apoptosis.
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Affiliation(s)
- V Sudhakar Reddy
- Biochemistry Division, ICMR-National Institute of Nutrition, Hyderabad, India.
| | - S Pandarinath
- Biochemistry Division, ICMR-National Institute of Nutrition, Hyderabad, India
| | - M Archana
- Biochemistry Division, ICMR-National Institute of Nutrition, Hyderabad, India
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Liu Y, Subedi K, Baride A, Romanova S, Callegari E, Huber CC, Wang X, Wang H. Peripherally misfolded proteins exacerbate ischemic stroke-induced neuroinflammation and brain injury. J Neuroinflammation 2021; 18:29. [PMID: PMID:33472658 PMCID: PMC7818745 DOI: 10.1186/s12974-021-02081-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 01/11/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Protein aggregates can be found in peripheral organs, such as the heart, kidney, and pancreas, but little is known about the impact of peripherally misfolded proteins on neuroinflammation and brain functional recovery following ischemic stroke. METHODS Here, we studied the ischemia/reperfusion (I/R) induced brain injury in mice with cardiomyocyte-restricted overexpression of a missense (R120G) mutant small heat shock protein, αB-crystallin (CryABR120G), by examining neuroinflammation and brain functional recovery following I/R in comparison to their non-transgenic (Ntg) littermates. To understand how peripherally misfolded proteins influence brain functionality, exosomes were isolated from CryABR120G and Ntg mouse blood and were used to treat wild-type (WT) mice and primary cortical neuron-glia mix cultures. Additionally, isolated protein aggregates from the brain following I/R were isolated and subjected to mass-spectrometric analysis to assess whether the aggregates contained the mutant protein, CryABR120G. To determine whether the CryABR120G misfolding can self-propagate, a misfolded protein seeding assay was performed in cell cultures. RESULTS Our results showed that CryABR120G mice exhibited dramatically increased infarct volume, delayed brain functional recovery, and enhanced neuroinflammation and protein aggregation in the brain following I/R when compared to the Ntg mice. Intriguingly, mass-spectrometric analysis of the protein aggregates isolated from CryABR120G mouse brains confirmed presence of the mutant CryABR120G protein in the brain. Importantly, intravenous administration of WT mice with the exosomes isolated from CryABR120G mouse blood exacerbated I/R-induced cerebral injury in WT mice. Moreover, incubation of the CryABR120G mouse exosomes with primary neuronal cultures induced pronounced protein aggregation. Transduction of CryABR120G aggregate seeds into cell cultures caused normal CryAB proteins to undergo dramatic aggregation and form large aggregates, suggesting self-propagation of CryABR120G misfolding in cells. CONCLUSIONS These results suggest that peripherally misfolded proteins in the heart remotely enhance neuroinflammation and exacerbate brain injury following I/R likely through exosomes, which may represent an underappreciated mechanism underlying heart-brain crosstalk.
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Affiliation(s)
- Yanying Liu
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, SD, 57069, USA
| | - Kalpana Subedi
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, SD, 57069, USA
| | - Aravind Baride
- Department of Chemistry, University of South Dakota, Vermillion, SD, 57069, USA
| | - Svetlana Romanova
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68106, USA
| | - Eduardo Callegari
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, SD, 57069, USA
| | - Christa C Huber
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, SD, 57069, USA
| | - Xuejun Wang
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, SD, 57069, USA
| | - Hongmin Wang
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, SD, 57069, USA.
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7
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Dukay B, Walter FR, Vigh JP, Barabási B, Hajdu P, Balassa T, Migh E, Kincses A, Hoyk Z, Szögi T, Borbély E, Csoboz B, Horváth P, Fülöp L, Penke B, Vígh L, Deli MA, Sántha M, Tóth ME. Neuroinflammatory processes are augmented in mice overexpressing human heat-shock protein B1 following ethanol-induced brain injury. J Neuroinflammation 2021; 18:22. [PMID: 33423680 PMCID: PMC7798334 DOI: 10.1186/s12974-020-02070-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 12/30/2020] [Indexed: 12/27/2022] Open
Abstract
Background Heat-shock protein B1 (HSPB1) is among the most well-known and versatile member of the evolutionarily conserved family of small heat-shock proteins. It has been implicated to serve a neuroprotective role against various neurological disorders via its modulatory activity on inflammation, yet its exact role in neuroinflammation is poorly understood. In order to shed light on the exact mechanism of inflammation modulation by HSPB1, we investigated the effect of HSPB1 on neuroinflammatory processes in an in vivo and in vitro model of acute brain injury. Methods In this study, we used a transgenic mouse strain overexpressing the human HSPB1 protein. In the in vivo experiments, 7-day-old transgenic and wild-type mice were treated with ethanol. Apoptotic cells were detected using TUNEL assay. The mRNA and protein levels of cytokines and glial cell markers were examined using RT-PCR and immunohistochemistry in the brain. We also established primary neuronal, astrocyte, and microglial cultures which were subjected to cytokine and ethanol treatments. TNFα and hHSPB1 levels were measured from the supernates by ELISA, and intracellular hHSPB1 expression was analyzed using fluorescent immunohistochemistry. Results Following ethanol treatment, the brains of hHSPB1-overexpressing mice showed a significantly higher mRNA level of pro-inflammatory cytokines (Tnf, Il1b), microglia (Cd68, Arg1), and astrocyte (Gfap) markers compared to wild-type brains. Microglial activation, and 1 week later, reactive astrogliosis was higher in certain brain areas of ethanol-treated transgenic mice compared to those of wild-types. Despite the remarkably high expression of pro-apoptotic Tnf, hHSPB1-overexpressing mice did not exhibit higher level of apoptosis. Our data suggest that intracellular hHSPB1, showing the highest level in primary astrocytes, was responsible for the inflammation-regulating effects. Microglia cells were the main source of TNFα in our model. Microglia isolated from hHSPB1-overexpressing mice showed a significantly higher release of TNFα compared to wild-type cells under inflammatory conditions. Conclusions Our work provides novel in vivo evidence that hHSPB1 overexpression has a regulating effect on acute neuroinflammation by intensifying the expression of pro-inflammatory cytokines and enhancing glial cell activation, but not increasing neuronal apoptosis. These results suggest that hHSPB1 may play a complex role in the modulation of the ethanol-induced neuroinflammatory response. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-020-02070-2.
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Affiliation(s)
- Brigitta Dukay
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary. .,Doctoral School in Biology, University of Szeged, Szeged, Hungary.
| | - Fruzsina R Walter
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Judit P Vigh
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Beáta Barabási
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Doctoral School in Theoretical Medicine, University of Szeged, Szeged, Hungary
| | - Petra Hajdu
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary
| | - Tamás Balassa
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary.,Doctoral School of Informatics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Ede Migh
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary
| | - András Kincses
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Zsófia Hoyk
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Titanilla Szögi
- Department of Medical Chemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Emőke Borbély
- Department of Medical Chemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Bálint Csoboz
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary.,Institute of Medical Biology, University of Tromsø, Tromsø, Norway
| | - Péter Horváth
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary.,Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Lívia Fülöp
- Department of Medical Chemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Botond Penke
- Department of Medical Chemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - László Vígh
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary
| | - Mária A Deli
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Miklós Sántha
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary
| | - Melinda E Tóth
- Institute of Biochemistry, Biological Research Centre, Temesvári krt. 62, Szeged, H-6726, Hungary.
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Mekala NK, Sasikumar S, Akula KK, Parekh Y, Rao CM, Bokara KK. HspB5 protects mouse neural stem/progenitor cells from paraquat toxicity. AMERICAN JOURNAL OF STEM CELLS 2020; 9:68-77. [PMID: 33489464 PMCID: PMC7811932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
INTRODUCTION HspB5 (αB-crystallin) is known to be involved in a variety of cellular functions, including, protection of cells from oxidative damage and inhibiting apoptosis. Neural stem/progenitor cells (NSPCs) have significant therapeutic value, especially in the NSC/NPC transplantation therapy. However, the viability of the transplanted NSPCs remains low because of various factors, including oxidative stress. OBJECTIVE The current investigation explored the possible role of HspB5 in the protection of mouse NSPCs (mNSPCs) against paraquat-induced toxicity. METHODS The recombinant human HspB5 was expressed in E.coli and was purified using gel filtration and Ion-exchange chromatography. The biophysical characterization of HspB5 was carried out using DLS, CD, and Analytical Ultracentrifugation (SV); the chaperone activity of HspB5 was determined by alcohol dehydrogenase aggregation assay. We have subjected the mNSPCs to paraquat-induced oxidative stress and monitored the protective ability of HspB5 by MTT assay and Hoechst-PI staining. Furthermore, increase in the expression of the anti-apoptotic protein, procaspase-3 was monitored using western blotting. RESULTS The recombinant HspB5 was purified to its homogeneity and was characterized using various biophysical techniques. The externally added FITC-labeled HspB5 was found to be localized within the cytoplasm of mNSPCs. Our Immunocytochemistry results showed that the externally added FITC-labeled HspB5 not only entered the cells but also conferred cytoprotection against paraquat-induced toxicity. The protective events were monitored by a decrease in the PI-positive cells and an increase in the procaspase-3 expression through Immunocytochemistry and Western blotting respectively. CONCLUSION Our results clearly demonstrate that exogenously added recombinant human HspB5 enters the mNSPCs and confers protection against paraquat toxicity.
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Affiliation(s)
| | - Shyama Sasikumar
- Department of Biomedical Engineering, Indian Institute of Technology HyderabadKandi-502285, Sangareddy, Telangana, India
| | - Kranthi Kiran Akula
- CSIR-Centre for Cellular and Molecular Biology, Annexe-II, Medical Biotechnology ComplexUppal Road, Hyderabad, Telangana 500007, India
| | - Yash Parekh
- CSIR-Centre for Cellular and Molecular Biology, Annexe-II, Medical Biotechnology ComplexUppal Road, Hyderabad, Telangana 500007, India
| | - Ch Mohan Rao
- CSIR-Centre for Cellular and Molecular Biology, Annexe-II, Medical Biotechnology ComplexUppal Road, Hyderabad, Telangana 500007, India
| | - Kiran Kumar Bokara
- CSIR-Centre for Cellular and Molecular Biology, Annexe-II, Medical Biotechnology ComplexUppal Road, Hyderabad, Telangana 500007, India
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Fu Y, Wu Z, Guo Z, Chen L, Ma Y, Wang Z, Xiao W, Wang Y. Systems-level analysis identifies key regulators driving epileptogenesis in temporal lobe epilepsy. Genomics 2020; 112:1768-1780. [DOI: 10.1016/j.ygeno.2019.09.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/31/2019] [Accepted: 09/25/2019] [Indexed: 01/05/2023]
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10
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Small heat shock protein CRYAB inhibits intestinal mucosal inflammatory responses and protects barrier integrity through suppressing IKKβ activity. Mucosal Immunol 2019; 12:1291-1303. [PMID: 31481750 DOI: 10.1038/s41385-019-0198-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 08/03/2019] [Accepted: 08/12/2019] [Indexed: 02/07/2023]
Abstract
Alpha B-crystallin (CRYAB) is an important member of the small heat shock protein family, and plays a protective and therapeutic role in neurological inflammation. CRYAB expression was assessed in cultured HT29 and Caco-2 cells and inflamed mucosa of patients with inflammatory bowel disease (IBD) and colitis models in mice. Lentivirus-overexpressing and CRSIPR/Cas9 systems were used in different cells to upregulate and silence CRYAB expression, respectively. Cell permeable recombined fusion protein TAT-CRYAB was injected intraperitoneally into dextran sulfate sodium (DSS)- or 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced colitis in mice to assess its anti-inflammatory effects. CRYAB was found to be significantly decreased in the inflamed mucosa from IBD patients and DSS-induced colitis in mice, and negatively correlated with the levels of TNF-α and IL-6, respectively. Enforced expression of CRYAB suppressed expression of proinflammatory cytokines (e.g., TNF-α, IL-6, IL-1β, and IL-8) via inhibiting the IKK complex formation, whereas lack of CRYAB expression markedly enhanced proinflammatory responses. Consistently, administration of TAT-CRYAB fusion protein significantly alleviated DSS- or TNBS-induced colitis in mice and protected intestinal barrier integrity. CRYAB regulates inflammatory response in intestinal mucosa by inhibiting IKKβ-mediated signaling and may serve as a novel therapeutic approach in the treatment of IBD.
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11
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Hamadmad S, Shah MH, Kusibati R, Kim B, Erickson B, Heisler-Taylor T, Bhattacharya SK, Abdel-Rahman MH, Cebulla CM. Significant upregulation of small heat shock protein αA-crystallin in retinal detachment. Exp Eye Res 2019; 189:107811. [PMID: 31550446 DOI: 10.1016/j.exer.2019.107811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/21/2019] [Accepted: 09/18/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Sumaya Hamadmad
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA
| | - Mohd Hussain Shah
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA
| | - Rania Kusibati
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA
| | - Bongsu Kim
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA
| | - Brandon Erickson
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA
| | - Tyler Heisler-Taylor
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA
| | - Sanjoy K Bhattacharya
- Bascom Palmer Eye Institute, Department of Ophthalmology, The Miller School of Medicine, Miami, FL, 33136, USA
| | - Mohamed H Abdel-Rahman
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA; Division Human Genetics, The Ohio State University Wexner Medical Center, Columbus, OH, 43240, USA
| | | | - Colleen M Cebulla
- The Ohio State University Department of Ophthalmology and Visual Science, Havener Eye Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH, 43212, USA.
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12
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Webster JM, Darling AL, Uversky VN, Blair LJ. Small Heat Shock Proteins, Big Impact on Protein Aggregation in Neurodegenerative Disease. Front Pharmacol 2019; 10:1047. [PMID: 31619995 PMCID: PMC6759932 DOI: 10.3389/fphar.2019.01047] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 08/19/2019] [Indexed: 12/15/2022] Open
Abstract
Misfolding, aggregation, and aberrant accumulation of proteins are central components in the progression of neurodegenerative disease. Cellular molecular chaperone systems modulate proteostasis, and, therefore, are primed to influence aberrant protein-induced neurotoxicity and disease progression. Molecular chaperones have a wide range of functions from facilitating proper nascent folding and refolding to degradation or sequestration of misfolded substrates. In disease states, molecular chaperones can display protective or aberrant effects, including the promotion and stabilization of toxic protein aggregates. This seems to be dependent on the aggregating protein and discrete chaperone interaction. Small heat shock proteins (sHsps) are a class of molecular chaperones that typically associate early with misfolded proteins. These interactions hold proteins in a reversible state that helps facilitate refolding or degradation by other chaperones and co-factors. These sHsp interactions require dynamic oligomerization state changes in response to diverse cellular triggers and, unlike later steps in the chaperone cascade of events, are ATP-independent. Here, we review evidence for modulation of neurodegenerative disease-relevant protein aggregation by sHsps. This includes data supporting direct physical interactions and potential roles of sHsps in the stewardship of pathological protein aggregates in brain. A greater understanding of the mechanisms of sHsp chaperone activity may help in the development of novel therapeutic strategies to modulate the aggregation of pathological, amyloidogenic proteins. sHsps-targeting strategies including modulators of expression or post-translational modification of endogenous sHsps, small molecules targeted to sHsp domains, and delivery of engineered molecular chaperones, are also discussed.
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Affiliation(s)
- Jack M Webster
- Department of Molecular Medicine, USF Byrd Institute, University of South Florida, Tampa, FL, United States
| | - April L Darling
- Department of Molecular Medicine, USF Byrd Institute, University of South Florida, Tampa, FL, United States
| | - Vladimir N Uversky
- Department of Molecular Medicine, USF Byrd Institute, University of South Florida, Tampa, FL, United States
| | - Laura J Blair
- Department of Molecular Medicine, USF Byrd Institute, University of South Florida, Tampa, FL, United States
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MAPK pathway and B cells overactivation in multiple sclerosis revealed by phosphoproteomics and genomic analysis. Proc Natl Acad Sci U S A 2019; 116:9671-9676. [PMID: 31004050 DOI: 10.1073/pnas.1818347116] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Dysregulation of signaling pathways in multiple sclerosis (MS) can be analyzed by phosphoproteomics in peripheral blood mononuclear cells (PBMCs). We performed in vitro kinetic assays on PBMCs in 195 MS patients and 60 matched controls and quantified the phosphorylation of 17 kinases using xMAP assays. Phosphoprotein levels were tested for association with genetic susceptibility by typing 112 single-nucleotide polymorphisms (SNPs) associated with MS susceptibility. We found increased phosphorylation of MP2K1 in MS patients relative to the controls. Moreover, we identified one SNP located in the PHDGH gene and another on IRF8 gene that were associated with MP2K1 phosphorylation levels, providing a first clue on how this MS risk gene may act. The analyses in patients treated with disease-modifying drugs identified the phosphorylation of each receptor's downstream kinases. Finally, using flow cytometry, we detected in MS patients increased STAT1, STAT3, TF65, and HSPB1 phosphorylation in CD19+ cells. These findings indicate the activation of cell survival and proliferation (MAPK), and proinflammatory (STAT) pathways in the immune cells of MS patients, primarily in B cells. The changes in the activation of these kinases suggest that these pathways may represent therapeutic targets for modulation by kinase inhibitors.
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14
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He L, He R, Liang R, Li Y, Li X, Li C, Zhang S. Protein expression profiling in the hippocampus after focal cerebral ischemia injury in rats. J Integr Neurosci 2018. [DOI: 10.3233/jin-170047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Lichan He
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
| | - Rui He
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
| | - Ruihua Liang
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
| | - Yi Li
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
| | - Xiaoqiang Li
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
| | - Chuqiao Li
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
| | - Suping Zhang
- Department of Neurology, Guangzhou Red Cross Hospital, Medical College, Jinan University, No. 396 Tongfu Zhong Road, Guangzhou 510220, China. E-mail:
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15
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Ruebsam A, Dulle JE, Myers AM, Sakrikar D, Green KM, Khan NW, Schey K, Fort PE. A specific phosphorylation regulates the protective role of αA-crystallin in diabetes. JCI Insight 2018; 3:97919. [PMID: 29467334 DOI: 10.1172/jci.insight.97919] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 01/17/2018] [Indexed: 12/19/2022] Open
Abstract
Neurodegeneration is a central aspect of the early stages of diabetic retinopathy, the primary ocular complication associated with diabetes. While progress has been made to improve the vascular perturbations associated with diabetic retinopathy, there are still no treatment options to counteract the neuroretinal degeneration associated with diabetes. Our previous work suggested that the molecular chaperones α-crystallins could be involved in the pathophysiology of diabetic retinopathy; however, the role and regulation of α-crystallins remained unknown. In the present study, we demonstrated the neuroprotective role of αA-crystallin during diabetes and its regulation by its phosphorylation on residue 148. We further characterized the dual role of αA-crystallin in neurons and glia, its essential role for neuronal survival, and its direct dependence on phosphorylation on this residue. These findings support further evaluation of αA-crystallin as a treatment option to promote neuron survival in diabetic retinopathy and neurodegenerative diseases in general.
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Affiliation(s)
- Anne Ruebsam
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Jennifer E Dulle
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Angela M Myers
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Katelyn M Green
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Naheed W Khan
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Kevin Schey
- Department of Biochemistry and Ophthalmology and Visual Sciences, Vanderbilt University, Nashville, Tennessee, USA
| | - Patrice E Fort
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA.,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
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16
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Why should neuroscientists worry about iron? The emerging role of ferroptosis in the pathophysiology of neuroprogressive diseases. Behav Brain Res 2017; 341:154-175. [PMID: 29289598 DOI: 10.1016/j.bbr.2017.12.036] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 12/23/2017] [Accepted: 12/27/2017] [Indexed: 12/12/2022]
Abstract
Ferroptosis is a unique form of programmed death, characterised by cytosolic accumulation of iron, lipid hydroperoxides and their metabolites, and effected by the fatal peroxidation of polyunsaturated fatty acids in the plasma membrane. It is a major driver of cell death in neurodegenerative neurological diseases. Moreover, cascades underpinning ferroptosis could be active drivers of neuropathology in major psychiatric disorders. Oxidative and nitrosative stress can adversely affect mechanisms and proteins governing cellular iron homeostasis, such as the iron regulatory protein/iron response element system, and can ultimately be a source of abnormally high levels of iron and a source of lethal levels of lipid membrane peroxidation. Furthermore, neuroinflammation leads to the upregulation of divalent metal transporter1 on the surface of astrocytes, microglia and neurones, making them highly sensitive to iron overload in the presence of high levels of non-transferrin-bound iron, thereby affording such levels a dominant role in respect of the induction of iron-mediated neuropathology. Mechanisms governing systemic and cellular iron homeostasis, and the related roles of ferritin and mitochondria are detailed, as are mechanisms explaining the negative regulation of ferroptosis by glutathione, glutathione peroxidase 4, the cysteine/glutamate antiporter system, heat shock protein 27 and nuclear factor erythroid 2-related factor 2. The potential role of DJ-1 inactivation in the precipitation of ferroptosis and the assessment of lipid peroxidation are described. Finally, a rational approach to therapy is considered, with a discussion on the roles of coenzyme Q10, iron chelation therapy, in the form of deferiprone, deferoxamine (desferrioxamine) and deferasirox, and N-acetylcysteine.
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Leal‐Lasarte MM, Franco JM, Labrador‐Garrido A, Pozo D, Roodveldt C. Extracellular TDP‐43 aggregates target MAPK/MAK/MRK overlapping kinase (MOK) and trigger caspase‐3/IL‐18 signaling in microglia. FASEB J 2017; 31:2797-2816. [DOI: 10.1096/fj.201601163r] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 02/26/2017] [Indexed: 12/12/2022]
Affiliation(s)
- María M. Leal‐Lasarte
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)University of Seville–Spanish Research Council (CSIC)–University Paplo de OlavideSeville Spain
| | - Jaime M. Franco
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)University of Seville–Spanish Research Council (CSIC)–University Paplo de OlavideSeville Spain
- Department of Medical BiochemistryMolecular Biology and ImmunologySchool of MedicineUniversity of SevilleSeville Spain
| | - Adahir Labrador‐Garrido
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)University of Seville–Spanish Research Council (CSIC)–University Paplo de OlavideSeville Spain
- Department of Medical BiochemistryMolecular Biology and ImmunologySchool of MedicineUniversity of SevilleSeville Spain
| | - David Pozo
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)University of Seville–Spanish Research Council (CSIC)–University Paplo de OlavideSeville Spain
- Department of Medical BiochemistryMolecular Biology and ImmunologySchool of MedicineUniversity of SevilleSeville Spain
| | - Cintia Roodveldt
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)University of Seville–Spanish Research Council (CSIC)–University Paplo de OlavideSeville Spain
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Phosphorylation of αB-crystallin supports reactive astrogliosis in demyelination. Proc Natl Acad Sci U S A 2017; 114:E1745-E1754. [PMID: 28196893 DOI: 10.1073/pnas.1621314114] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The small heat shock protein αB-crystallin (CRYAB) has been implicated in multiple sclerosis (MS) pathogenesis. Earlier studies have indicated that CRYAB inhibits inflammation and attenuates clinical disease when administered in the experimental autoimmune encephalomyelitis model of MS. In this study, we evaluated the role of CRYAB in primary demyelinating events. Using the cuprizone model of demyelination, a noninflammatory model that allows the analysis of glial responses in MS, we show that endogenous CRYAB expression is associated with increased severity of demyelination. Moreover, we demonstrate a strong correlation between the expression of CRYAB and the extent of reactive astrogliosis in demyelinating areas and in in vitro assays. In addition, we reveal that CRYAB is differentially phosphorylated in astrocytes in active demyelinating MS lesions, as well as in cuprizone-induced lesions, and that this phosphorylation is required for the reactive astrocyte response associated with demyelination. Furthermore, taking a proteomics approach to identify proteins that are bound by the phosphorylated forms of CRYAB in primary cultured astrocytes, we show that there is clear differential binding of protein targets due to the specific phosphorylation of CRYAB. Subsequent Ingenuity Pathway Analysis of these targets reveals implications for intracellular pathways and biological processes that could be affected by these modifications. Together, these findings demonstrate that astrocytes play a pivotal role in demyelination, making them a potential target for therapeutic intervention, and that phosphorylation of CRYAB is a key factor supporting the pathogenic response of astrocytes to oligodendrocyte injury.
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Abstract
Multiple sclerosis (MS) is an immune-mediated and neurodegenerative central nervous system disease, mostly affect myelin sheaths. The MS pathogenesis is still under debate. It is influenced by genetic, environment factors. Heat shock proteins (HSPs) are highly conserved proteins seen in all organisms. Not only heat stress but also under many stress conditions they are overexpressed. Their roles in MS pathogenesis are highly correlated with their location (intracellular or extracellular). In this chapter, we will discuss the role of HSP in MS pathogenesis.
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20
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Bartelt-Kirbach B, Moron M, Glomb M, Beck CM, Weller MP, Golenhofen N. HspB5/αB-crystallin increases dendritic complexity and protects the dendritic arbor during heat shock in cultured rat hippocampal neurons. Cell Mol Life Sci 2016; 73:3761-75. [PMID: 27085702 PMCID: PMC11108385 DOI: 10.1007/s00018-016-2219-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 03/18/2016] [Accepted: 04/05/2016] [Indexed: 11/29/2022]
Abstract
The small heat shock protein ΗspΒ5 (αB-crystallin) exhibits generally cytoprotective functions and possesses powerful neuroprotective capacity in the brain. However, little is known about the mode of action of ΗspΒ5 or other members of the HspB family particularly in neurons. To get clues of the neuronal function of HspBs, we overexpressed several HspBs in cultured rat hippocampal neurons and investigated their effect on neuronal morphology and stress resistance. Whereas axon length and synapse density were not affected by any HspB, dendritic complexity was enhanced by HspB5 and, to a lesser extent, by HspB6. Furthermore, we could show that this process was dependent on phosphorylation, since a non-phosphorylatable mutant of HspB5 did not show this effect. Rarefaction of the dendritic arbor is one hallmark of several neurodegenerative diseases. To investigate if HspB5, which is upregulated at pathophysiological conditions, might be able to protect dendrites during such situations, we exposed HspB5 overexpressing neuronal cultures to heat shock. HspB5 prevented heat shock-induced rarefaction of dendrites. In conclusion, we identified regulation of dendritic complexity as a new function of HspB5 in hippocampal neurons.
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Affiliation(s)
- Britta Bartelt-Kirbach
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Margarethe Moron
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Maximilian Glomb
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Clara-Maria Beck
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Marie-Pascale Weller
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Nikola Golenhofen
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
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21
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Ghahramani M, Yousefi R, Khoshaman K, Moghadam SS, Kurganov BI. Evaluation of structure, chaperone-like activity and protective ability of peroxynitrite modified human α-Crystallin subunits against copper-mediated ascorbic acid oxidation. Int J Biol Macromol 2016; 87:208-21. [DOI: 10.1016/j.ijbiomac.2016.02.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 02/12/2016] [Accepted: 02/12/2016] [Indexed: 01/15/2023]
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22
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Schmidt T, Fischer D, Andreadaki A, Bartelt-Kirbach B, Golenhofen N. Induction and phosphorylation of the small heat shock proteins HspB1/Hsp25 and HspB5/αB-crystallin in the rat retina upon optic nerve injury. Cell Stress Chaperones 2016; 21:167-178. [PMID: 26475352 PMCID: PMC4679741 DOI: 10.1007/s12192-015-0650-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 09/10/2015] [Accepted: 10/07/2015] [Indexed: 11/25/2022] Open
Abstract
Several eye diseases are associated with axonal injury in the optic nerve, which normally leads to degeneration of retinal ganglion cells (RGCs) and subsequently to loss of vision. There is experimental evidence that some members of the small heat shock protein family (HspBs) are upregulated upon optic nerve injury (ONI) in the retina and sufficient to promote RGC survival. These data raise the question as to whether other family members may play a similar role in this context. Here, we performed a comprehensive comparative study comprising all HspBs in an experimental model of ONI. We found that five HspBs were expressed in the adult rat retina at control conditions but only HspB1 and HspB5 were upregulated in response to ONI. Furthermore, HspB1 and HspB5 were constitutively phosphorylated in Müller cells at serine 15 and serine 59, respectively. In RGCs, phosphorylation was stimulated by ONI and occurred at serine 86 of HspB1 and at serine 19 and 45 of HspB5. These data suggest that of all small heat shock proteins, only HspB1 and HspB5 might be of protective value for RGCs after ONI and that this process might be regulated by phosphorylation at serine 86 of HspB1 and serine 19 and serine 45 of HspB5. The molecular targets of phosphoHspB1 and phosphoHspB5 remain to be identified.
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Affiliation(s)
- Thomas Schmidt
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Dietmar Fischer
- Department of Experimental Neurology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Anastasia Andreadaki
- Department of Experimental Neurology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Britta Bartelt-Kirbach
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Nikola Golenhofen
- Institute of Anatomy and Cell Biology, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
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Zhang Y, Chen Y, Wu J, Manaenko A, Yang P, Tang J, Fu W, Zhang JH. Activation of Dopamine D2 Receptor Suppresses Neuroinflammation Through αB-Crystalline by Inhibition of NF-κB Nuclear Translocation in Experimental ICH Mice Model. Stroke 2015; 46:2637-46. [PMID: 26251254 DOI: 10.1161/strokeaha.115.009792] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 07/06/2015] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE Inflammatory injury plays a critical role in intracerebral hemorrhage (ICH)-induced secondary brain injury. Recently, dopamine D2 receptor (DRD2) is identified as an important component controlling innate immunity and inflammatory response in central nervous system, and αB-crystallin (CRYAB) is a potent negative regulator on inflammatory pathways. Here, we sought to investigate the role of DRD2 on neuroinflammation after experimental ICH and the potential mechanism mediated by CRYAB. METHODS Two hundred and twenty-four (224) male CD-1 mice were subjected to intrastriatal infusion of bacterial collagenase or autologous blood. Two DRD2 agonists quinpirole and ropinirole were administrated by daily intraperitoneal injection starting at 1 hour after ICH. DRD2 and CRYAB in vivo knockdown was performed 48 hours before ICH insult. Behavioral deficits and brain water content, Western blots, immunofluorescence staining, coimmunoprecipitation (Co-IP) assay, and proteome cytokine array were evaluated. RESULTS Endogenous DRD2 and CRYAB expressions were increased after ICH. DRD2 knockdown aggravated the neurobehavioral deficits and the pronounced cytokine expressions. DRD2 activation by quinpirole and ropinirole ameliorated neurological outcome, brain edema, interleukin-1β, and monocyte chemoattractant protein-1 expression, as well as microglia/macrophages activation, in the perihematomal region. These effects were abolished by pretreatment with CRYAB siRNAs. Quinpirole enhanced cytoplasmic binding activity between CRYAB and NF-κB and decreased nuclear NF-κB expression. Similar therapeutic benefits were observed using autologous blood injection model and intranasal delivery of quinpirole. CONCLUSIONS DRD2 may have anti-inflammatory effects after ICH. DRD2 agonists inhibited neuroinflammation and attenuated brain injury after ICH, which is probably mediated by CRYAB and enhanced cytoplasmic binding activity with NF-κB.
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Affiliation(s)
- Yang Zhang
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.)
| | - Yujie Chen
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.)
| | - Jiang Wu
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.)
| | - Anatol Manaenko
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.)
| | - Peng Yang
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.)
| | - Jiping Tang
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.)
| | - Weiling Fu
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.).
| | - John H Zhang
- From the Department of Laboratory Medicine (Y.Z., W.F.) and Department of Neurosurgery (Y.C.), Southwest Hospital, Third Military Medical University, Chongqing, China; Department of Physiology and Pharmacology, Loma Linda University, CA (Y.Z., Y.C., J.W., A.M., P.Y., J.T., J.H.Z.); and Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215006, China (J.W.).
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Reddy VS, Jakhotia S, Reddy PY, Reddy GB. Hyperglycemia induced expression, phosphorylation, and translocation of αB-crystallin in rat skeletal muscle. IUBMB Life 2015; 67:291-9. [PMID: 25900025 DOI: 10.1002/iub.1370] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 02/27/2015] [Indexed: 12/16/2022]
Abstract
αB-Crystallin (αBC) is a member of the small heat shock protein family that responds to a variety of stress and prevents the aggregation of partially unfolded proteins. Chronic hyperglycemia created during diabetes results in skeletal muscle atrophy and leads to diabetic myopathy. The aim of this study was to investigate the role of αBC under chronic hyperglycemia in rat skeletal muscle. Diabetes was induced in Wistar rats by a single i.p injection of streptozotocin and maintained for a period of 12 weeks at the end of which the animals were sacrificed and the muscle was collected. The protein levels of αBC and its phosphorylation status in gastrocnemius muscle were analyzed by immunoblotting. The translocation of phosphorylated αBC was analyzed by detergent solubility assay, co-immunoprecipitation (Co-IP), and immunohistochemistry. The cell death was analyzed by TUNEL assay and by apoptotic markers. The interaction of αBC with Bax was analyzed by Co-IP. Chronic hyperglycemia significantly increased the protein levels of αBC and its phosphorylation at S59 by activation of p38 mitogen-activated protein kinase (p38MAPK) and at S45 by activation of the extracellular regulated protein kinase 1/2 (ERK1/2). Further, phosphorylated αBC translocated and interacted with desmin indicating that phosphorylated αBC forms might be involved in protection of sarcomere structures from disruption in chronic hyperglycemia. Further, Co-IP studies showed an impaired interaction of αBC with Bax which could be one of the possible factors for increased cell death as evidenced by TUNEL assay in diabetic muscle. These results suggest that an increased expression, phosphorylation, translocation of αBC, and its involvement in apoptosis might play a significant role in maintenance of cytoskeletal architecture and protection of cells from apoptosis in diabetic skeletal muscle.
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Affiliation(s)
- Vadde Sudhakar Reddy
- Biochemistry Division, National Institute of Nutrition, Jamai-Osmania, Hyderabad, Telangana, India
| | - Sneha Jakhotia
- Biochemistry Division, National Institute of Nutrition, Jamai-Osmania, Hyderabad, Telangana, India
| | - P Yadagiri Reddy
- Biochemistry Division, National Institute of Nutrition, Jamai-Osmania, Hyderabad, Telangana, India
| | - G Bhanuprakash Reddy
- Biochemistry Division, National Institute of Nutrition, Jamai-Osmania, Hyderabad, Telangana, India
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Zhou P, Kannan R, Spee C, Sreekumar PG, Dou G, Hinton DR. Protection of retina by αB crystallin in sodium iodate induced retinal degeneration. PLoS One 2014; 9:e98275. [PMID: 24874187 PMCID: PMC4038555 DOI: 10.1371/journal.pone.0098275] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Accepted: 04/29/2014] [Indexed: 12/21/2022] Open
Abstract
Age-related macular degeneration (AMD) is a leading cause of blindness in the developed world. The retinal pigment epithelium (RPE) is a critical site of pathology in AMD and αB crystallin expression is increased in RPE and associated drusen in AMD. The purpose of this study was to investigate the role of αB crystallin in sodium iodate (NaIO3)-induced retinal degeneration, a model of AMD in which the primary site of pathology is the RPE. Dose dependent effects of intravenous NaIO3 (20-70 mg/kg) on development of retinal degeneration (fundus photography) and RPE and retinal neuronal loss (histology) were determined in wild type and αB crystallin knockout mice. Absence of αB crystallin augmented retinal degeneration in low dose (20 mg/kg) NaIO3-treated mice and increased retinal cell apoptosis which was mainly localized to the RPE layer. Generation of reactive oxygen species (ROS) was observed with NaIO3 in mouse and human RPE which increased further after αB crystallin knockout or siRNA knockdown, respectively. NaIO3 upregulated AKT phosphorylation and peroxisome proliferator–activator receptor–γ (PPARγ) which was suppressed after αB crystallin siRNA knockdown. Further, PPARγ ligand inhibited NaIO3-induced ROS generation. Our data suggest that αB crystallin plays a critical role in protection of NaIO3-induced oxidative stress and retinal degeneration in part through upregulation of AKT phosphorylation and PPARγ expression.
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Affiliation(s)
- Peng Zhou
- Doheny Eye Institute, Los Angeles, California, United States of America
| | - Ram Kannan
- Doheny Eye Institute, Los Angeles, California, United States of America
| | - Christine Spee
- Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, California, United States of America
| | | | - Guorui Dou
- Doheny Eye Institute, Los Angeles, California, United States of America
| | - David R. Hinton
- Departments of Pathology, Keck School of Medicine of the University of Southern California, Los Angeles, California, United States of America
- Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, California, United States of America
- * E-mail:
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26
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Cameron RT, Quinn SD, Cairns LS, MacLeod R, Samuel IDW, Smith BO, Carlos Penedo J, Baillie GS. The phosphorylation of Hsp20 enhances its association with amyloid-β to increase protection against neuronal cell death. Mol Cell Neurosci 2014; 61:46-55. [PMID: 24859569 PMCID: PMC4148482 DOI: 10.1016/j.mcn.2014.05.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 04/29/2014] [Accepted: 05/01/2014] [Indexed: 01/25/2023] Open
Abstract
Up-regulation of Hsp20 protein levels in response to amyloid fibril formation is considered a key protective response against the onset of Alzheimer's disease (AD). Indeed, the physical interaction between Hsp20 and Aβ is known to prevent Aβ oligomerisation and protects neuronal cells from Aβ mediated toxicity, however, details of the molecular mechanism and regulatory cell signalling events behind this process have remained elusive. Using both conventional MTT end-point assays and novel real time measurement of cell impedance, we show that Hsp20 protects human neuroblastoma SH-SY5Y cells from the neurotoxic effects of Aβ. In an attempt to provide a mechanism for the neuroprotection afforded by Hsp20, we used peptide array, co-immunoprecipitation analysis and NMR techniques to map the interaction between Hsp20 and Aβ and report a binding mode where Hsp20 binds adjacent to the oligomerisation domain of Aβ, preventing aggregation. The Hsp20/Aβ interaction is enhanced by Hsp20 phosphorylation, which serves to increase association with low molecular weight Aβ species and decrease the effective concentration of Hsp20 required to disrupt the formation of amyloid oligomers. Finally, using a novel fluorescent assay for the real time evaluation of morphology-specific Aβ aggregation, we show that phospho-dependency of this effect is more pronounced for fibrils than for globular Aβ forms and that 25mers corresponding to the Hsp20 N-terminal can be used as Aβ aggregate inhibitors. Our report is the first to provide a molecular model for the Hsp20/Aβ complex and the first to suggest that modulation of the cAMP/cGMP pathways could be a novel route to enhance Hsp20-mediated attenuation of Aβ fibril neurotoxicity.
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Affiliation(s)
- Ryan T Cameron
- Institute of Cardiovascular and Medical Science, College of Veterinary, Medical and life sciences, University of Glasgow, Glasgow G128QQ, UK
| | - Steven D Quinn
- SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, Fife KY169SS, UK
| | - Lynn S Cairns
- Institute of Cardiovascular and Medical Science, College of Veterinary, Medical and life sciences, University of Glasgow, Glasgow G128QQ, UK
| | - Ruth MacLeod
- Institute of Cardiovascular and Medical Science, College of Veterinary, Medical and life sciences, University of Glasgow, Glasgow G128QQ, UK
| | - Ifor D W Samuel
- SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, Fife KY169SS, UK
| | - Brian O Smith
- Institute of Cardiovascular and Medical Science, College of Veterinary, Medical and life sciences, University of Glasgow, Glasgow G128QQ, UK
| | - J Carlos Penedo
- SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, Fife KY169SS, UK
| | - George S Baillie
- Institute of Cardiovascular and Medical Science, College of Veterinary, Medical and life sciences, University of Glasgow, Glasgow G128QQ, UK.
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27
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Pan X, Zhu B, Luo Y, Fu D. Unraveling the protein network of tomato fruit in response to necrotrophic phytopathogenic Rhizopus nigricans. PLoS One 2013; 8:e73034. [PMID: 24023804 PMCID: PMC3759434 DOI: 10.1371/journal.pone.0073034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 07/16/2013] [Indexed: 12/13/2022] Open
Abstract
Plants are endowed with a sophisticated defense mechanism that gives signals to plant cells about the immediate danger from surroundings and protects them from pathogen invasion. In the search for the particular proteins involved in fruit defense responses, we report here a comparative analysis of tomato fruit (Solanum lycopersicum cv. Ailsa Craig) infected by Rhizopus nigricans Ehrenb, which is a significant contributor to postharvest rot disease in fresh tomato fruits. In total, four hundred forty-five tomato proteins were detected in common between the non-infected group and infected tomato fruit of mature green. Forty-nine differentially expressed spots in 2-D gels were identified, and were sorted into fifteen functional groups. Most of these proteins participate directly in the stress response process, while others were found to be involved in several equally important biological processes: protein metabolic process, carbohydrate metabolic process, ethylene biosynthesis, and cell death and so on. These responses occur in different cellular components, both intra- and extracellular spaces. The differentially expressed proteins were integrated into several pathways to show the regulation style existing in tomato fruit host. The composition of the collected proteins populations and the putative functions of the identified proteins argue for their roles in pathogen-plant interactions. Collectively results provide evidence that several regulatory pathways contribute to the resistance of tomato fruit to pathogen.
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Affiliation(s)
- Xiaoqi Pan
- The College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Benzhong Zhu
- The College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Yunbo Luo
- The College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Daqi Fu
- The College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
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28
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Gruden G, Barutta F, Catto I, Bosco G, Caprioli MG, Pinach S, Fornengo P, Cavallo-Perin P, Davini O, Cerrato P, Bruno G. Serum levels of heat shock protein 27 in patients with acute ischemic stroke. Cell Stress Chaperones 2013; 18:531-3. [PMID: 23334892 PMCID: PMC3682014 DOI: 10.1007/s12192-013-0403-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 01/03/2013] [Accepted: 01/04/2013] [Indexed: 11/26/2022] Open
Abstract
Expression of intracellular heat shock protein 27 (Hsp27) rises in the brain of animal models of cerebral ischemia and stroke. Hsp27 is also released into the circulation and the aim of the present study was to investigated if serum Hsp27 (sHsp27) levels are altered in patients with acute ischemic stroke. sHsp27 was measured in 15 patients with acute ischemic stroke and in 14 control subjects comparable for age, sex, and cardiovascular risk factors. In patients, measurements were performed at admission and 1, 2, and 30 days thereafter. At admission, mean sHsp27 values were threefold higher in patients than in controls. In patients, sHsp27 values dropped after 24 h, rose again at 48 h, and markedly declined at 30 days, indicating the presence of a temporal trend of sHsp27 values following acute ischemic stroke.
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Affiliation(s)
- Gabriella Gruden
- Department of Medical Science, University of Turin, Corso Dogliotti 14, Turin, Italy.
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29
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Van Eden W, Bonorino C, Van Der Zee R. The immunology of cellular stress proteins. Front Immunol 2013; 4:153. [PMID: 23785370 PMCID: PMC3684847 DOI: 10.3389/fimmu.2013.00153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 06/04/2013] [Indexed: 01/09/2023] Open
Affiliation(s)
- Willem Van Eden
- Infectious Diseases and Immunology, Utrecht University Utrecht, Netherlands
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