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Casazza AA, Capraro M, Pedrazzi M, D’Agostino G, Onofri F, Marte A, De Tullio R, Perego P, Averna M. Temperature-Dependent Olive Pomace Extraction for Obtaining Bioactive Compounds Preventing the Death of Murine Cortical Neurons. Int J Mol Sci 2024; 25:907. [PMID: 38255981 PMCID: PMC10815748 DOI: 10.3390/ijms25020907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
High-pressure and temperature extraction (HPTE) can effectively recover bioactive compounds from olive pomace (OP). HPTE extract obtained by extracting OP with ethanol and water (50:50 v/v) at 180 °C for 90 min demonstrated a pronounced ability to preserve intracellular calcium homeostasis, shielding neurons from the harmful effects induced by N-methyl-d-aspartate (NMDA) receptor (NMDAR) overactivation, such as aberrant calpain activation. In this study, the extraction temperature was changed from 37 to 180 °C, and the extracts were evaluated for their antioxidant potency and ability to preserve crucial intracellular Ca2+-homeostasis necessary for neuronal survival. Additionally, to verify the temperature-induced activity of the extract, further extractions on the exhausted olive pomace were conducted, aiming to identify variations in the quality and quantity of extracted phenolic molecules through HPLC analysis. The results revealed a significant increase in bioactive compounds as a function of temperature variation, reaching 6.31 ± 0.09 mgCAE/mL extract for the extraction performed at 180 °C. Subsequent extraction of the exhausted residues yielded extracts that remained active in preventing calcium-induced cell death. Moreover, despite increased antiradical power, extracts re-treated at 180 °C did not display cell protection activity. Our results indicate that the molecules able to maintain physiological Ca2+-homeostasis in murine cortical neurons in conditions of cytotoxic stimulation of NMDAR are wholly recovered from olive pomace only following extraction performed at 180 °C.
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Affiliation(s)
- Alessandro Alberto Casazza
- Department of Civil, Environmental Engineering, University of Genoa, 16145 Genova, Italy; (A.A.C.); (G.D.); (P.P.)
| | - Michela Capraro
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (M.C.); (M.P.); (F.O.); (A.M.); (R.D.T.)
| | - Marco Pedrazzi
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (M.C.); (M.P.); (F.O.); (A.M.); (R.D.T.)
| | - Giulia D’Agostino
- Department of Civil, Environmental Engineering, University of Genoa, 16145 Genova, Italy; (A.A.C.); (G.D.); (P.P.)
- National Research Centre for Agricultural Technologies (CN AgriTech), 80138 Naples, Italy
| | - Franco Onofri
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (M.C.); (M.P.); (F.O.); (A.M.); (R.D.T.)
- IRCCS, Ospedale Policlinico San Martino, 16132 Genova, Italy
| | - Antonella Marte
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (M.C.); (M.P.); (F.O.); (A.M.); (R.D.T.)
| | - Roberta De Tullio
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (M.C.); (M.P.); (F.O.); (A.M.); (R.D.T.)
| | - Patrizia Perego
- Department of Civil, Environmental Engineering, University of Genoa, 16145 Genova, Italy; (A.A.C.); (G.D.); (P.P.)
- National Research Centre for Agricultural Technologies (CN AgriTech), 80138 Naples, Italy
| | - Monica Averna
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (M.C.); (M.P.); (F.O.); (A.M.); (R.D.T.)
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Liu L, Xia L, Li Y, Zhang Y, Wang Q, Ding J, Wang X. Inhibiting SRC activity attenuates kainic-acid induced mouse epilepsy via reducing NR2B phosphorylation and full-length NR2B expression. Epilepsy Res 2022; 185:106975. [PMID: 35907325 DOI: 10.1016/j.eplepsyres.2022.106975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/25/2022] [Accepted: 07/05/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To explore the effect of SRC activation on spontaneously recurrent seizures and to investigate the underlying mechanisms of NR2B phosphorylation. METHODS C57BL/6 mice were injected intrahippocampally with kainic acid (KA, 0.4 μg/25 g) to induce status epilepticus (SE). Saracatinib(STB) was used as an SRC inhibitor. Spontaneously recurrent seizures were monitored from day 7 to day 14 after the KA injection. Nissl's stain and NeuN were used to detect neuron loss and Timm stain was used to evaluate mossy fibre sprouting 14 days after KA injection. We also investigated the effect of SRC on full-length expression of NR2B. MDL28170 was used to inhibit calpain activity. Western blotting and qPCR were performed to verify phosphorylation levels and expression of SRC and NR2B 24 h after KA injection. RESULTS The duration of status epileptics in the SRC inhibitor group decreased significantly compared to the KA group 24 h after the injection of KA (P < 0.05). The application of the SRC inhibitor significantly reduced the degree of contralateral mossy fibre sprouting (P < 0.05) and improved the degree of neuron loss (P < 0.01) compared to the epilepsy group. Full-length NR2B levels in the ipsilateral hippocampus decreased in the epilepsy group (P < 0.01) compared to the sham group, and it further decreased in the STB inhibitor group (P < 0.01). The effect of the STB inhibitor was counteracted by simultaneous inhibition of SRC activity and calpain activation, while the level of full-length NR2B increased compared to the KA+STB group(P < 0.01). Reduction of NR2B cleavage by MDL28170 significantly increased the duration of epileptic status compared to the KA group (P < 0.05). SIGNIFICANCE Our data indicated that the early application of SRC inhibitors exerted protective effects on seizure severity, loss of neurons, and sprouting of mossy fibres in KA-induced mouse epilepsy. Seizure severity attenuation due to SRC inhibition was associated with the decrease of NR2B in both the phosphorylation and full-length forms.
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Affiliation(s)
- Lu Liu
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China
| | - Lu Xia
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China
| | - Yuxiang Li
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China
| | - Yiying Zhang
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China
| | - Qiang Wang
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China
| | - Jing Ding
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China.
| | - Xin Wang
- Department of Neurology, Zhongshan Hospital, Fudan University, Fenglin Road, Shanghai 200032, China; Department of The State Key Laboratory of Medical Neurobiology, The Institutes of Brain Science and the Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China.
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Positive Allosteric Modulation of CB1 and CB2 Cannabinoid Receptors Enhances the Neuroprotective Activity of a Dual CB1R/CB2R Orthosteric Agonist. Life (Basel) 2020; 10:life10120333. [PMID: 33302569 PMCID: PMC7763181 DOI: 10.3390/life10120333] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/04/2020] [Accepted: 12/06/2020] [Indexed: 12/13/2022] Open
Abstract
Preclinical studies highlighted that compounds targeting cannabinoid receptors could be useful for developing novel therapies against neurodegenerative disorders. However, the chronic use of orthosteric agonists alone has several disadvantages, limiting their usefulness as clinically relevant drugs. Positive allosteric modulators might represent a promising approach to achieve the potential therapeutic benefits of orthosteric agonists of cannabinoid receptors through increasing their activity and limiting their adverse effects. The aim of the present study was to show the effects of positive allosteric ligands of cannabinoid receptors on the activity of a potent dual orthosteric agonist for neuroinflammation and excitotoxic damage by excessive glutamate release. The results indicate that the combination of an orthosteric agonist with positive allosteric modulators could represent a promising therapeutic approach to the treatment of neurodegenerative disorders.
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Arena C, Gado F, Di Cesare Mannelli L, Cervetto C, Carpi S, Reynoso-Moreno I, Polini B, Vallini E, Chicca S, Lucarini E, Bertini S, D’Andrea F, Digiacomo M, Poli G, Tuccinardi T, Macchia M, Gertsch J, Marcoli M, Nieri P, Ghelardini C, Chicca A, Manera C. The endocannabinoid system dual-target ligand N-cycloheptyl-1,2-dihydro-5-bromo-1-(4-fluorobenzyl)-6-methyl-2-oxo-pyridine-3-carboxamide improves disease severity in a mouse model of multiple sclerosis. Eur J Med Chem 2020; 208:112858. [DOI: 10.1016/j.ejmech.2020.112858] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/17/2020] [Accepted: 09/17/2020] [Indexed: 12/30/2022]
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Comparative Proteomics Unveils LRRFIP1 as a New Player in the DAPK1 Interactome of Neurons Exposed to Oxygen and Glucose Deprivation. Antioxidants (Basel) 2020; 9:antiox9121202. [PMID: 33265962 PMCID: PMC7761126 DOI: 10.3390/antiox9121202] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/01/2020] [Accepted: 11/23/2020] [Indexed: 02/07/2023] Open
Abstract
Death-associated protein kinase 1 (DAPK1) is a pleiotropic hub of a number of networked distributed intracellular processes. Among them, DAPK1 is known to interact with the excitotoxicity driver NMDA receptor (NMDAR), and in sudden pathophysiological conditions of the brain, e.g., stroke, several lines of evidence link DAPK1 with the transduction of glutamate-induced events that determine neuronal fate. In turn, DAPK1 expression and activity are known to be affected by the redox status of the cell. To delineate specific and differential neuronal DAPK1 interactors in stroke-like conditions in vitro, we exposed primary cultures of rat cortical neurons to oxygen/glucose deprivation (OGD), a condition that increases reactive oxygen species (ROS) and lipid peroxides. OGD or control samples were co-immunoprecipitated separately, trypsin-digested, and proteins in the interactome identified by high-resolution LC-MS/MS. Data were processed and curated using bioinformatics tools. OGD increased total DAPK1 protein levels, cleavage into shorter isoforms, and dephosphorylation to render the active DAPK1 form. The DAPK1 interactome comprises some 600 proteins, mostly involving binding, catalytic and structural molecular functions. OGD up-regulated 190 and down-regulated 192 candidate DAPK1-interacting proteins. Some differentially up-regulated interactors related to NMDAR were validated by WB. In addition, a novel differential DAPK1 partner, LRRFIP1, was further confirmed by reverse Co-IP. Furthermore, LRRFIP1 levels were increased by pro-oxidant conditions such as ODG or the ferroptosis inducer erastin. The present study identifies novel partners of DAPK1, such as LRRFIP1, which are suitable as targets for neuroprotection.
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Delint-Ramirez I, Segev A, Pavuluri A, Self DW, Kourrich S. Cocaine-Induced Synaptic Redistribution of NMDARs in Striatal Neurons Alters NMDAR-Dependent Signal Transduction. Front Neurosci 2020; 14:698. [PMID: 32760242 PMCID: PMC7371985 DOI: 10.3389/fnins.2020.00698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/09/2020] [Indexed: 11/25/2022] Open
Abstract
The consequence of repeated cocaine exposure and prolonged abstinence on glutamate receptor expression in the nucleus accumbens has been extensively studied. However, the early effects of cocaine on NMDAR signaling remain unknown. NMDAR signaling depends on the subunit composition, subcellular localization, and the interaction with proteins at the postsynaptic density (PSD), where NMDARs and other proteins form supercomplexes that are responsible for the signaling pathways activated by NMDAR-induced Ca2+ influx. Here, we investigated the effect of cocaine on NMDAR subunit composition and subcellular localization after both intraperitoneal non-contingent cocaine and response-contingent intravenous cocaine self-administration in mice. We found that repeated cocaine exposure, regardless of the route or contingency of drug administration, decreases NMDAR interactions with the PSD and synaptic lipid rafts in the accumbens shell and dorsal striatum. We provide evidence that cocaine triggers an early redistribution of NMDARs from synaptic to extrasynaptic sites, and that this adaptation has implications in the activation of downstream signaling pathways. Thus, consistent with a loss of NMDAR function, cocaine-induced ERK phosphorylation is attenuated. Because early NMDAR activity contributes to the initiation of lasting addiction-relevant neuroadaptations, these data may hold clues into cellular mechanisms responsible for the development of cocaine addiction.
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Affiliation(s)
- Ilse Delint-Ramirez
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Amir Segev
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Asha Pavuluri
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - David W Self
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Saïd Kourrich
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, United States.,Département des Sciences Biologiques-CERMO-FC, Université du Québec à Montréal, Montreal, QC, Canada
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Phosphorylation of Serine 157 Protects the Rat Glycine Transporter GlyT2 from Calpain Cleavage. J Mol Neurosci 2020; 70:1216-1224. [PMID: 32172509 DOI: 10.1007/s12031-020-01529-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 03/03/2020] [Indexed: 11/25/2022]
Abstract
The N-terminal region of the rat glycine transporter 2 (rGlyT2, SLC6A5) is cleaved by calpain protease in vitro, which raises the question of its protection against calpain in vivo. Here, we used a phosphomimetic and orthogonal phosphoserine translation approach to investigate the possible role of phosphorylation in the protection of two calpain cleavage sites, M156/S157 and G164/T165, previously identified in the N-terminus region of the rat GlyT2. Replacement of serine 157 with phosphomimetic aspartate or with orthogonal phosphoserine blocked both calpain cleavage sites and caused an electrophoretic mobility shift of rGlyT2N fusion proteins. Both effects can be reversed by dephosphorylation, suggesting that phosphorylation might induce structural changes in the rGlyT2 N-terminus, preventing the accessibility of the M156/S157 and G164/T165 cleavage sites to calpain in vivo. In comparison with the wild type, the phosphomimetic mutation S157D increased the total immunoreactivity of the transporter expressed in neuroblastoma cells, suggesting that serine 157 phosphorylation or phosphorylation-regulated calpain cleavage might contribute to the turnover of the glycine transporter GlyT2.
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Denda K, Ida K, Tanno M, Nakao-Wakabayashi K, Komada M, Hayashi N. Proteomic analysis of Nrk gene-disrupted placental tissue cells explains physiological significance of NRK. BMC Res Notes 2019; 12:785. [PMID: 31783915 PMCID: PMC6884884 DOI: 10.1186/s13104-019-4818-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 11/21/2019] [Indexed: 11/10/2022] Open
Abstract
Objective NRK is a unique X chromosome-linked protein kinase expressed predominantly in placenta. The gene knockout causes placental overgrowth and delayed labor of Nrk-null fetuses from dams in mouse. To clarify unknown mechanisms behind the Nrk-null phenotypes, protein expression profiles were analyzed in the Nrk-null placenta using a high-performance two-dimensional electrophoresis methodology. Results Among around 1800 spots detected, we characterized a dozen protein spots whose expression levels were significantly altered in the Nrk-null placenta compared to wild-type. Analyzing these data sets is expected to reflect the difference physiologically in the presence or absence of NRK, facilitating the development of therapeutic strategies.
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Affiliation(s)
- Kimitoshi Denda
- School of Life Science and Technology, Tokyo Institute of Technology, (M6-6) 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Kanako Ida
- School of Life Science and Technology, Tokyo Institute of Technology, (M6-6) 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Masataka Tanno
- Department of Pathology, Tokyo Nishi Tokushukai Hospital, Akishima, Japan
| | - Kanako Nakao-Wakabayashi
- School of Life Science and Technology, Tokyo Institute of Technology, (M6-6) 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Masayuki Komada
- Cell Biology Unit, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Nobuhiro Hayashi
- School of Life Science and Technology, Tokyo Institute of Technology, (M6-6) 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.
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Cotti Piccinelli S, Bassi MT, Citterio A, Manganelli F, Tozza S, Santorelli FM, Gallo Cassarino S, Caria F, Baldelli E, Galvagni A, Santoro L, Padovani A, Filosto M. A Novel CAPN1 Mutation Causes a Pure Hereditary Spastic Paraplegia in an Italian Family. Front Neurol 2019; 10:580. [PMID: 31231303 PMCID: PMC6560055 DOI: 10.3389/fneur.2019.00580] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/16/2019] [Indexed: 12/24/2022] Open
Abstract
CAPN1 encodes calpain-1, a large subunit of μ-calpain, a calcium-activated cysteine protease widely present in the central nervous system. Mutations in CAPN1 have recently been identified in a complicated form of Hereditary Spastic Paraplegia (HSP) with a combination of cerebellar ataxia and corticomotor tract disorder (SPG76). Therefore, CAPN1 is now considered one of those genes that clinically manifest with a spectrum of disorders ranging from spasticity to cerebellar ataxia and represent a link between Spinocerebellar Ataxia and HSP, two groups of diseases previously considered separate but sharing pathophysiological pathways. We here describe clinical and molecular findings of two Italian adult siblings affected with a pure form of HSP and harboring the novel homozygote c.959delA variant (p.Tyr320Leufs*73) in the CAPN1 gene. Although the reason why mutations in CAPN1 may cause heterogeneous clinical pictures remains speculative, our findings confirm that the spectrum of the CAPN1-linked phenotypes includes pure HSP with onset during the third decade of life. Further studies are warrantied in order to clarify the mechanism underlying the differences in CAPN1 mutation clinical expression.
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Affiliation(s)
- Stefano Cotti Piccinelli
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
| | - Maria T Bassi
- Laboratory of Molecular Biology, Scientific Institute IRCCS E. Medea, Lecco, Italy
| | - Andrea Citterio
- Laboratory of Molecular Biology, Scientific Institute IRCCS E. Medea, Lecco, Italy
| | - Fiore Manganelli
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University Federico II of Naples, Naples, Italy
| | - Stefano Tozza
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University Federico II of Naples, Naples, Italy
| | | | - Serena Gallo Cassarino
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
| | - Filomena Caria
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
| | - Enrico Baldelli
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
| | - Anna Galvagni
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
| | - Lucio Santoro
- Department of Neurosciences, Reproductive Sciences and Odontostomatology, University Federico II of Naples, Naples, Italy
| | - Alessandro Padovani
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
| | - Massimiliano Filosto
- Unit of Neurology, Center for Neuromuscular Diseases, ASST Spedali Civili and University of Brescia, Brescia, Italy
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On the cause of sleep: Protein fragments, the concept of sentinels, and links to epilepsy. Proc Natl Acad Sci U S A 2019; 116:10773-10782. [PMID: 31085645 DOI: 10.1073/pnas.1904709116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The molecular-level cause of sleep is unknown. In 2012, we suggested that the cause of sleep stems from cumulative effects of numerous intracellular and extracellular protein fragments. According to the fragment generation (FG) hypothesis, protein fragments (which are continually produced through nonprocessive cleavages by intracellular, intramembrane, and extracellular proteases) can be beneficial but toxic as well, and some fragments are eliminated slowly during wakefulness. We consider the FG hypothesis and propose that, during wakefulness, the degradation of accumulating fragments is delayed within natural protein aggregates such as postsynaptic densities (PSDs) in excitatory synapses and in other dense protein meshworks, owing to an impeded diffusion of the ∼3,000-kDa 26S proteasome. We also propose that a major function of sleep involves a partial and reversible expansion of PSDs, allowing an accelerated destruction of PSD-localized fragments by the ubiquitin/proteasome system. Expansion of PSDs would alter electrochemistry of synapses, thereby contributing to a decreased neuronal firing during sleep. If so, the loss of consciousness, a feature of sleep, would be the consequence of molecular processes (expansions of protein meshworks) that are required for degradation of protein fragments. We consider the concept of FG sentinels, which signal to sleep-regulating circuits that the levels of fragments are going up. Also discussed is the possibility that protein fragments, which are known to be overproduced during an epileptic seizure, may contribute to postictal sleep and termination of seizures. These and related suggestions, described in the paper, are compatible with current evidence about sleep and lead to testable predictions.
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Wang S, Liao L, Wang M, Zhou H, Huang Y, Wang Z, Chen D, Ji D, Xia X, Wang Y, Liu F, Huang J, Xiong K. Pin1 Promotes Regulated Necrosis Induced by Glutamate in Rat Retinal Neurons via CAST/Calpain2 Pathway. Front Cell Neurosci 2018; 11:425. [PMID: 29403356 PMCID: PMC5786546 DOI: 10.3389/fncel.2017.00425] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 12/18/2017] [Indexed: 12/11/2022] Open
Abstract
The purpose of the current study was to investigate whether peptidyl-prolyl cis/trans isomerase NIMA-interacting 1 (Pin1) can interact with calpastatin (CAST) and regulate CAST/calpain2, under excessive glutamate conditions, and subsequently regulate necrosis in rat retinal neurons. Glutamate triggered CAST/calpain2-mediated necrosis regulation in primary cultured retinal neurons, as demonstrated by propidium iodide-staining and lactate dehydrogenase assay. Co-IP results and a computer simulation suggested that Pin1 could bind to CAST. Western blot, real-time quantitative polymerase chain reaction, immunofluorescence, and phosphorylation analysis results demonstrated that CAST was regulated by Pin1, as proven by the application of juglone (i.e., a Pin1 specific inhibitor). The retinal ganglion cell 5 cell line, combined with siRNA approach and flow cytometry, was then used to verify the regulatory pathway of Pin1 in CAST/calpain2-modulated neuronal necrosis that was induced by glutamate. Finally, in vivo studies further confirmed the role of Pin1 in CAST/calpain2-modulated necrosis following glutamate excitation, in the rat retinal ganglion cell and inner nuclear layers. In addition, a flash electroretinogram study provided evidence for the recovery of impaired visual function, which was induced by glutamate, with juglone treatment. Our work aims to investigate the involvement of the Pin1-CAST/calpain2 pathway in glutamate-mediated excitotoxicity.
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Affiliation(s)
- Shuchao Wang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Lvshuang Liao
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Mi Wang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Hongkang Zhou
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Yanxia Huang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Zhen Wang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Dan Chen
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Dan Ji
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, China
| | - Xiaobo Xia
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, China
| | - Yong Wang
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Fengxia Liu
- Department of Human Anatomy, School of Basic Medical Science, Xinjiang Medical University, Ürümqi, China
| | - Jufang Huang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
| | - Kun Xiong
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, China
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Calpain-1 resident in lipid raft/caveolin-1 membrane microdomains plays a protective role in endothelial cells. Biochimie 2017; 133:20-27. [DOI: 10.1016/j.biochi.2016.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/07/2016] [Indexed: 12/20/2022]
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