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Cheng X, Cao L, Sun X, Zhou S, Zhu T, Zheng J, Liu S, Liu H. Metabolomic profile of plasma approach to investigate the mechanism of Poria cocos oligosaccharides attenuated LPS-induced acute lung injury in mice. J Pharm Biomed Anal 2024; 247:116262. [PMID: 38820835 DOI: 10.1016/j.jpba.2024.116262] [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: 12/01/2023] [Revised: 05/21/2024] [Accepted: 05/26/2024] [Indexed: 06/02/2024]
Abstract
Poria cocos (Schw.) Wolf (PCW) are the dried sclerotia of Poaceae fungus Poria cocos that contain many biological activity ingredients such as polysaccharides and triterpenoids. The carbohydrates from Poria cocos have been proven to possess anti-inflammatory and antioxidant effects. This study aimed to investigate the impact and mechanism of Poria cocos oligosaccharides (PCO) protecting mice against acute lung injury (ALI). We examined the histopathological analysis of lung injury, inflammatory, and edema levels to evaluate the benefits of PCO during ALI. As a result, PCO improved the lipopolysaccharide (LPS) induced lung injury and decreased the inflammatory cytokines of lung tissue. Simultaneously, PCO alleviated lung edema by regulating the expression of aquaporin5 (AQP5) and epithelial Na+ channel protein (ENaC-α). Additionally, untargeted metabolomics was performed on the plasma of ALI mice via HUPLC-Triple-TOF/MS. The results indicated that linoleic acid, linolenic acid, arachidonic acid, carnosine, glutamic acid, and 1-methylhistamine were the biomarkers in ALI mice. Besides, metabolic pathway analysis suggested PCO affected the histidine and fatty acid metabolism, which were closely associated with inflammation and oxidative reaction of the host. Consequently, the effects of PCO inhibiting inflammation and edema might relate to the reducing pro-inflammatory mediators and the reverse of abnormal metabolic pathways.
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Affiliation(s)
- Xue Cheng
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China
| | - Lu Cao
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China
| | - Xiongjie Sun
- School of Pharmacy, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China
| | - Shuhan Zhou
- School of Traditional Chinese Medicine, Hubei University of Chinese Medicine, China
| | - Tianxiang Zhu
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China
| | - Junping Zheng
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China
| | - Songlin Liu
- School of Traditional Chinese Medicine, Hubei University of Chinese Medicine, China; Hubei Shizhen Laboratory, Wuchang District Huayuanshan 4, Wuhan 430061, PR China; Key Laboratory of Chinese Medicinal Resource and Chinese Herbal Compound of the Ministry of Education, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China.
| | - Hongtao Liu
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China; Hubei Shizhen Laboratory, Wuchang District Huayuanshan 4, Wuhan 430061, PR China; Key Laboratory of Chinese Medicinal Resource and Chinese Herbal Compound of the Ministry of Education, Hubei University of Chinese Medicine, Huangjiahu West Road 16, Wuhan 430065, PR China.
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Wang Q, Yang C, Chen S, Li J. Miniaturized Electrochemical Sensing Platforms for Quantitative Monitoring of Glutamate Dynamics in the Central Nervous System. Angew Chem Int Ed Engl 2024:e202406867. [PMID: 38829963 DOI: 10.1002/anie.202406867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/30/2024] [Accepted: 06/03/2024] [Indexed: 06/05/2024]
Abstract
Glutamate is one of the most important excitatory neurotransmitters within the mammalian central nervous system. The role of glutamate in regulating neural network signaling transmission through both synaptic and extra-synaptic paths highlights the importance of the real-time and continuous monitoring of its concentration and dynamics in living organisms. Progresses in multidisciplinary research have promoted the development of electrochemical glutamate sensors through the co-design of materials, interfaces, electronic devices, and integrated systems. This review summarizes recent works reporting various electrochemical sensor designs and their applicability as miniaturized neural probes to in vivo sensing within biological environments. We start with an overview of the role and physiological significance of glutamate, the metabolic routes, and its presence in various bodily fluids. Next, we discuss the design principles, commonly employed validation models/protocols, and successful demonstrations of multifunctional, compact, and bio-integrated devices in animal models. The final section provides an outlook on the development of the next generation glutamate sensors for neuroscience and neuroengineering, with the aim of offering practical guidance for future research.
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Affiliation(s)
- Qi Wang
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Chunyu Yang
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Shulin Chen
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Jinghua Li
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
- Chronic Brain Injury Program, The Ohio State University, Columbus, OH 43210, USA
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3
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Govindaraju R, Govindaraju S, Yun K, Kim J. Fluorescent-Based Neurotransmitter Sensors: Present and Future Perspectives. BIOSENSORS 2023; 13:1008. [PMID: 38131768 PMCID: PMC10742055 DOI: 10.3390/bios13121008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023]
Abstract
Neurotransmitters (NTs) are endogenous low-molecular-weight chemical compounds that transmit synaptic signals in the central nervous system. These NTs play a crucial role in facilitating signal communication, motor control, and processes related to memory and learning. Abnormalities in the levels of NTs lead to chronic mental health disorders and heart diseases. Therefore, detecting imbalances in the levels of NTs is important for diagnosing early stages of diseases associated with NTs. Sensing technologies detect NTs rapidly, specifically, and selectively, overcoming the limitations of conventional diagnostic methods. In this review, we focus on the fluorescence-based biosensors that use nanomaterials such as metal clusters, carbon dots, and quantum dots. Additionally, we review biomaterial-based, including aptamer- and enzyme-based, and genetically encoded biosensors. Furthermore, we elaborate on the fluorescence mechanisms, including fluorescence resonance energy transfer, photon-induced electron transfer, intramolecular charge transfer, and excited-state intramolecular proton transfer, in the context of their applications for the detection of NTs. We also discuss the significance of NTs in human physiological functions, address the current challenges in designing fluorescence-based biosensors for the detection of NTs, and explore their future development.
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Affiliation(s)
- Rajapriya Govindaraju
- Department of Chemical and Biological Engineering, Gachon University, 1342 Seongnam Daero, Seongnam-si 13120, Gyeonggi-do, Republic of Korea;
| | - Saravanan Govindaraju
- Department of Bio Nanotechnology, Gachon University, Seongnam-si 13120, Gyeonggi-do, Republic of Korea; (S.G.); (K.Y.)
| | - Kyusik Yun
- Department of Bio Nanotechnology, Gachon University, Seongnam-si 13120, Gyeonggi-do, Republic of Korea; (S.G.); (K.Y.)
| | - Jongsung Kim
- Department of Chemical and Biological Engineering, Gachon University, 1342 Seongnam Daero, Seongnam-si 13120, Gyeonggi-do, Republic of Korea;
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Ball L, Bauer J, Krautwurst D. Heterodimerization of Chemoreceptors TAS1R3 and mGlu 2 in Human Blood Leukocytes. Int J Mol Sci 2023; 24:12942. [PMID: 37629122 PMCID: PMC10454557 DOI: 10.3390/ijms241612942] [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: 06/15/2023] [Revised: 08/08/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
The expression of canonical chemosensory receptors of the tongue, such as the heteromeric sweet taste (TAS1R2/TAS1R3) and umami taste (TAS1R1/TAS1R3) receptors, has been demonstrated in many extra-oral cells and tissues. Gene expression studies have revealed transcripts for all TAS1 and metabotropic glutamate (mGlu) receptors in different types of immune cells, where they are involved, for example, in the chemotaxis of human neutrophils and the protection of T cells from activation-induced cell death. Like other class-C G protein-coupling receptors (GPCRs), TAS1Rs and mGlu receptors form heteromers within their families. Since mGlu receptors and TAS1R1/TAS1R3 share the same ligand, monosodium glutamate (MSG), we hypothesized their hitherto unknown heteromerization across receptor families in leukocytes. Here we show, by means of immunocytochemistry and co-IP/Western analysis, that across class-C GPCR families, mGlu2 and TAS1R3 co-localize and heterodimerize in blood leukocytes. Expressing the recombinant receptors in HEK-293 cells, we validated their heterodimerization by bioluminescence resonance energy transfer. We demonstrate MSG-induced, mGlu2/TAS1R3 heteromer-dependent gain-of-function and pertussis toxin-sensitive signaling in luminescence assays. Notably, we show that mGlu2/TAS1R3 is necessary and sufficient for MSG-induced facilitation of N-formyl-methionyl-leucyl-phenylalanine-stimulated IL-8 secretion in neutrophils, using receptor-specific antagonists. In summary, our results demonstrate mGlu2/TAS1R3 heterodimerization in leukocytes, suggesting cellular function-tailored chemoreceptor combinations to modulate cellular immune responses.
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Affiliation(s)
- Lena Ball
- TUM School of Life Sciences, Technical University of Munich, Alte Akademie 8a, 85354 Freising, Germany;
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany;
| | - Julia Bauer
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany;
| | - Dietmar Krautwurst
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany;
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Reusswig F, Yilmaz M, Brechtenkamp M, Krueger I, Metz LM, Klöcker N, Lammert E, Elvers M. The NMDA receptor regulates integrin activation, ATP release and arterial thrombosis through store-operated Ca 2+ entry in platelets. Front Cardiovasc Med 2023; 10:1171831. [PMID: 37252113 PMCID: PMC10217778 DOI: 10.3389/fcvm.2023.1171831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 04/27/2023] [Indexed: 05/31/2023] Open
Abstract
Introduction Platelet activation and thrombus formation is crucial for hemostasis, but also trigger arterial thrombosis. Calcium mobilization plays an important role in platelet activation, because many cellular processes depend on the level of intracellular Ca2+ ([Ca2+](i)), such as integrin activation, degranulation, cytoskeletal reorganization. Different modulators of Ca2+ signaling have been implied, such as STIM1, Orai1, CyPA, SGK1, etc. Also, the N-methyl-D-aspartate receptor (NMDAR) was identified to contribute to Ca2+ signaling in platelets. However, the role of the NMDAR in thrombus formation is not well defined. Methods In vitro and in vivo analysis of platelet-specific NMDAR knock-out mice. Results In this study, we analyzed Grin1fl/fl-Pf4-Cre+ mice with a platelet-specific knock-out of the essential GluN1 subunit of the NMDAR. We found reduced store-operated Ca2+ entry (SOCE), but unaltered store release in GluN1-deficient platelets. Defective SOCE resulted in reduced Src and PKC substrate phosphorylation following stimulation of glycoprotein (GP)VI or the thrombin receptor PAR4 followed by decreased integrin activation but unaltered degranulation. Consequently, thrombus formation on collagen under flow conditions was reduced ex vivo, and Grin1fl/fl-Pf4-Cre+ mice were protected against arterial thrombosis. Results from human platelets treated with the NMDAR antagonist MK-801 revealed a crucial role of the NMDAR in integrin activation and Ca2+ homeostasis in human platelets as well. Conclusion NMDAR signaling is important for SOCE in platelets and contributes to platelet activation and arterial thrombosis. Thus, the NMDAR represents a novel target for anti-platelet therapy in cardiovascular disease (CVD).
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Affiliation(s)
- Friedrich Reusswig
- Department of Vascular- and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
| | - Münteha Yilmaz
- Department of Vascular- and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
| | - Marius Brechtenkamp
- Department of Vascular- and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
| | - Irena Krueger
- Department of Vascular- and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
| | - Lisa Maria Metz
- Department of Vascular- and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
| | - Nikolaj Klöcker
- Institute of Neural and Sensory Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
| | - Eckhard Lammert
- Institute for Vascular and Islet Cell Biology, German Diabetes Center (DDZ), Leibniz Center for Diabetes Research at Heinrich-Heine University, Düsseldorf, Germany
- German Center for Diabetes Research (DZD e.V.), Helmholtz Zentrum München, Neuherberg, Germany
- Institute of Metabolic Physiology, Heinrich Heine University, Düsseldorf, Germany
| | - Margitta Elvers
- Department of Vascular- and Endovascular Surgery, University Hospital Düsseldorf, Heinrich-Heine University, Düsseldorf, Germany
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Snider S, Albano L, Gagliardi F, Comai S, Roncelli F, De Domenico P, Pompeo E, Panni P, Bens N, Calvi MR, Mortini P, Ruban A. Substantially elevated serum glutamate and CSF GOT-1 levels associated with cerebral ischemia and poor neurological outcomes in subarachnoid hemorrhage patients. Sci Rep 2023; 13:5246. [PMID: 37002262 PMCID: PMC10066256 DOI: 10.1038/s41598-023-32302-3] [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: 08/24/2022] [Accepted: 03/25/2023] [Indexed: 04/03/2023] Open
Abstract
Brain injury and cerebral vasospasm during the 14 days after the subarachnoid hemorrhage (SAH) are considered the leading causes of poor outcomes. The primary injury induces a cascade of events, including increased intracranial pressure, cerebral vasospasm and ischemia, glutamate excitotoxicity, and neuronal cell death. The objective of this study was to monitor the time course of glutamate, and associated enzymes, such as glutamate-oxaloacetate transaminase (GOT1), glutamate-pyruvate transaminase (GPT) in cerebrospinal fluid (CSF) and serum, shortly after SAH, and to assess their prognostic value. A total of 74 participants participated in this study: 45 participants with SAH and 29 controls. Serum and CSF were sampled up to 14 days after SAH. SAH participants' clinical and neurological status were assessed at hospitalization, at discharge from the hospital, and 3 months after SAH. Furthermore, a logistic regression analysis was carried out to evaluate the ability of GOT1 and glutamate levels to predict neurological outcomes. Our results demonstrated consistently elevated serum and CSF glutamate levels after SAH. Furthermore, serum glutamate level was significantly higher in patients with cerebral ischemia and poor neurological outcome. CSF GOT1 was significantly higher in patients with uncontrolled intracranial hypertension and cerebral ischemia post-SAH, and independently predicted poor neurological outcomes.
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Affiliation(s)
- Silvia Snider
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Luigi Albano
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Filippo Gagliardi
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Stefano Comai
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | - Francesca Roncelli
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Pierfrancesco De Domenico
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Edoardo Pompeo
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Pietro Panni
- Department of Neuroradiology, IRCCS San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Nicole Bens
- Behavioral Neuroscience, Human Movement Science, Mathematics, Pre-Medicine, Northeastern University COS, Boston, MA, USA
| | - Maria Rosa Calvi
- Department of Neurocritical Care, IRCCS San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Pietro Mortini
- Department of Neurosurgery and Gamma Knife Radiosurgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Angela Ruban
- Sackler Faculty of Medicine, Steyer School of Health Professions, Tel Aviv University, P.O. Box 39040, 6997801, Tel-Aviv, Israel.
- Sagol School of Neuroscience, Tel-Aviv University, P.O. Box 39040, 6997801, Tel-Aviv, Israel.
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Association between Traumatic Subarachnoid Hemorrhage and Acute Respiratory Failure in Moderate-to-Severe Traumatic Brain Injury Patients. J Clin Med 2022; 11:jcm11143995. [PMID: 35887760 PMCID: PMC9318973 DOI: 10.3390/jcm11143995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/27/2022] [Accepted: 07/05/2022] [Indexed: 01/25/2023] Open
Abstract
Acute respiratory failure (ARF) with a high incidence among moderate-to-severe traumatic brain injury (M-STBI) patients plays a pivotal role in worsening neurological outcomes. Traumatic subarachnoid hemorrhage (tSAH) is highly prevalent in M-STBI, which is associated with significant adverse outcomes. In this retrospective cohort study, we aimed to explore the association between the severity of the tSAH and ARF in the M-STBI population. A total of 771 subjects were reviewed. Clinical and neuroimaging data of M-STBI patients were retrospectively collected, and ARF was ascertained retrospectively based on their electronic medical record. The degree of tSAH was classified according to Fisher’s criteria, and the grade of tSAH was dichotomized to a low Fisher grade (Fisher grade 1–2) and a high Fisher grade (Fisher grade 3–4). After exclusion procedures, the data of 695 M-STBI patients were analyzed. A total of 284 (30.8%) had a high Fisher grade on admission. The overall rate of ARF within 48 h upon admission was 34.4% (239/695); it was 29.5% (142/481) and 46.3% (99/214) for the low and high Fisher groups, respectively. In a full cohort, a high Fisher grade was associated with ARF after adjusting for age, gender, GCS, smoking history, comorbidities, multiple injuries, characteristics of TBI, and pulmonary factors (OR 1.78; 95% CI, 1.11–2.85, p = 0.016). This result remained robust in the comparisons after PSM (71/132, 42.8% vs. 53/132, 31.9%; OR, 1.59; 95% CI, 1.02–2.49, p = 0.042). A high Fisher SAH grade exposure on admission is associated with ARF in M-STBI patients.
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Kim SB, Park Y, Ahn JW, Sim J, Park J, Kim YJ, Hwang SJ, Sung KS, Lim J. Potential of Hematologic Parameters in Predicting Mortality of Patients with Traumatic Brain Injury. J Clin Med 2022; 11:jcm11113220. [PMID: 35683607 PMCID: PMC9181160 DOI: 10.3390/jcm11113220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/24/2022] [Accepted: 06/02/2022] [Indexed: 12/10/2022] Open
Abstract
Traumatic brain injury (TBI) occurs frequently, and acute TBI requiring surgical treatment is closely related to patient survival. Models for predicting the prognosis of patients with TBI do not consider various factors of patient status; therefore, it is difficult to predict the prognosis more accurately. In this study, we created a model that can predict the survival of patients with TBI by adding hematologic parameters along with existing non-hematologic parameters. The best-fitting model was created using the Akaike information criterion (AIC), and hematologic factors including preoperative hematocrit, preoperative C-reactive protein (CRP), postoperative white blood cell (WBC) count, and postoperative hemoglobin were selected to predict the prognosis. Among several prediction models, the model that included age, Glasgow Coma Scale, Injury Severity Score, preoperative hematocrit, preoperative CRP, postoperative WBC count, postoperative hemoglobin, and postoperative CRP showed the highest area under the curve and the lowest corrected AIC for a finite sample size. Our study showed a new prediction model for mortality in patients with TBI using non-hematologic and hematologic parameters. This prediction model could be useful for the management of patients with TBI.
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Affiliation(s)
- Sol Bi Kim
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam 13496, Korea; (S.B.K.); (J.W.A.); (J.S.); (J.P.); (Y.J.K.); (S.J.H.)
| | - Youngjoon Park
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam 13488, Korea;
| | - Ju Won Ahn
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam 13496, Korea; (S.B.K.); (J.W.A.); (J.S.); (J.P.); (Y.J.K.); (S.J.H.)
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam 13488, Korea;
| | - Jeongmin Sim
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam 13496, Korea; (S.B.K.); (J.W.A.); (J.S.); (J.P.); (Y.J.K.); (S.J.H.)
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam 13488, Korea;
| | - Jeongman Park
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam 13496, Korea; (S.B.K.); (J.W.A.); (J.S.); (J.P.); (Y.J.K.); (S.J.H.)
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam 13488, Korea;
| | - Yu Jin Kim
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam 13496, Korea; (S.B.K.); (J.W.A.); (J.S.); (J.P.); (Y.J.K.); (S.J.H.)
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam 13488, Korea;
| | - So Jung Hwang
- Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Yatap-dong 59, Seongnam 13496, Korea; (S.B.K.); (J.W.A.); (J.S.); (J.P.); (Y.J.K.); (S.J.H.)
| | - Kyoung Su Sung
- Department of Neurosurgery, Dong-A University Hospital, Dong-A University College of Medicine, Busan 49201, Korea
- Correspondence: (K.S.S.); (J.L.); Tel.: +82-31-780-5688 (J.L.); Fax: +82-31-780-5269 (J.L.)
| | - Jaejoon Lim
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam 13488, Korea;
- Correspondence: (K.S.S.); (J.L.); Tel.: +82-31-780-5688 (J.L.); Fax: +82-31-780-5269 (J.L.)
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9
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Kaplan-Arabaci O, Acari A, Ciftci P, Gozuacik D. Glutamate Scavenging as a Neuroreparative Strategy in Ischemic Stroke. Front Pharmacol 2022; 13:866738. [PMID: 35401202 PMCID: PMC8984161 DOI: 10.3389/fphar.2022.866738] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/08/2022] [Indexed: 12/17/2022] Open
Abstract
Stroke is the second highest reason of death in the world and the leading cause of disability. The ischemic stroke makes up the majority of stroke cases that occur due to the blockage of blood vessels. Therapeutic applications for ischemic stroke include thrombolytic treatments that are in limited usage and only applicable to less than 10% of the total stroke patients, but there are promising new approaches. The main cause of ischemic neuronal death is glutamate excitotoxicity. There have been multiple studies focusing on neuroprotection via reduction of glutamate both in ischemic stroke and other neurodegenerative diseases that ultimately failed due to the obstacles in delivery. At that point, systemic glutamate grabbing, or scavenging is an ingenious way of decreasing glutamate levels upon ischemic stroke. The main advantage of this new therapeutic method is the scavengers working in the circulating blood so that there is no interference with the natural brain neurophysiology. In this review, we explain the molecular mechanisms of ischemic stroke, provide brief information about existing drugs and approaches, and present novel systemic glutamate scavenging methods. This review hopefully will elucidate the potential usage of the introduced therapeutic approaches in stroke patients.
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Affiliation(s)
- Oykum Kaplan-Arabaci
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey.,Sabancı University Nanotechnology Research and Application Center (SUNUM), Istanbul, Turkey
| | - Alperen Acari
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Pinar Ciftci
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Devrim Gozuacik
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey.,Sabancı University Nanotechnology Research and Application Center (SUNUM), Istanbul, Turkey.,School of Medicine, Koç University, Istanbul, Turkey
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10
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Acevedo-Aguilar L, Gaitán-Herrera G, Reina-Rivero R, Lozada-Martínez ID, Bohorquez-Caballero A, Paéz-Escallón N, Del Pilar Zambrano-Arenas MD, Ortega-Sierra MG, Moscote-Salazar LR, Janjua T. Pulmonary injury as a predictor of cerebral hypoxia in traumatic brain injury: from physiology to physiopathology. J Neurosurg Sci 2021; 66:251-257. [PMID: 34763389 DOI: 10.23736/s0390-5616.21.05468-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Traumatic brain injury is caused by mechanical forces impacting the skull and its internal structures and constitutes one of the main causes of morbidity and mortality in the world. Clinically, severe traumatic brain injury is associated with the development of acute lung injury and so far, few studies have evaluated the cellular, molecular and immunological mechanisms involved in this pathophysiological process. Knowing and investigating these mechanisms allows us to correlate pulmonary injury as a predictor of cerebral hypoxia in traumatic brain injury and to use this finding in decision making during clinical practice. This review aims to provide evidence on the importance of the pathophysiology of traumatic brain injury-acute lung injury, and thus confirm its role as a predictor of cerebral hypoxia, helping to establish an appropriate therapeutic strategy to improve functional outcomes and reduce mortality.
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Affiliation(s)
- Laura Acevedo-Aguilar
- Medical and Surgical Research Center, School of Medicine, University of Cartagena, Cartagena, Colombia
| | - Gustavo Gaitán-Herrera
- Medical and Surgical Research Center, School of Medicine, University of Cartagena, Cartagena, Colombia
| | - Randy Reina-Rivero
- Medical and Surgical Research Center, School of Medicine, University of Cartagena, Cartagena, Colombia
| | - Ivan D Lozada-Martínez
- Medical and Surgical Research Center, School of Medicine, University of Cartagena, Cartagena, Colombia - .,Colombian Clinical Research Group in Neurocritical Care, School of Medicine, University of Cartagena, Cartagena, Colombia.,Latin American Council of Neurocritical Care, Cartagena, Colombia.,Future Surgeons Chapter, Colombian Surgery Association, Bogotá, Colombia
| | | | | | | | - Michael G Ortega-Sierra
- Medical and Surgical Research Center, School of Medicine, Corporación Universitaria Rafael Nuñez, Cartagena, Colombia
| | - Luis R Moscote-Salazar
- Medical and Surgical Research Center, School of Medicine, University of Cartagena, Cartagena, Colombia.,Colombian Clinical Research Group in Neurocritical Care, School of Medicine, University of Cartagena, Cartagena, Colombia.,Latin American Council of Neurocritical Care, Cartagena, Colombia
| | - Tariq Janjua
- Intensive Care, Regions Hospital, Saint Paul, MN, USA
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11
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Glutamate triggers the expression of functional ionotropic and metabotropic glutamate receptors in mast cells. Cell Mol Immunol 2021; 18:2383-2392. [PMID: 32313211 PMCID: PMC8484602 DOI: 10.1038/s41423-020-0421-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 03/16/2020] [Indexed: 02/07/2023] Open
Abstract
Mast cells are emerging as players in the communication between peripheral nerve endings and cells of the immune system. However, it is not clear the mechanism by which mast cells communicate with peripheral nerves. We previously found that mast cells located within healing tendons can express glutamate receptors, raising the possibility that mast cells may be sensitive to glutamate signaling. To evaluate this hypothesis, we stimulated primary mast cells with glutamate and showed that glutamate induced the profound upregulation of a panel of glutamate receptors of both the ionotropic type (NMDAR1, NMDAR2A, and NMDAR2B) and the metabotropic type (mGluR2 and mGluR7) at both the mRNA and protein levels. The binding of glutamate to glutamate receptors on the mast cell surface was confirmed. Further, glutamate had extensive effects on gene expression in the mast cells, including the upregulation of pro-inflammatory components such as IL-6 and CCL2. Glutamate also induced the upregulation of transcription factors, including Egr2, Egr3 and, in particular, FosB. The extensive induction of FosB was confirmed by immunofluorescence assessment. Glutamate receptor antagonists abrogated the responses of the mast cells to glutamate, supporting the supposition of a functional glutamate-glutamate receptor axis in mast cells. Finally, we provide in vivo evidence supporting a functional glutamate-glutamate receptor axis in the mast cells of injured tendons. Together, these findings establish glutamate as an effector of mast cell function, thereby introducing a novel principle for how cells in the immune system can communicate with nerve cells.
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12
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Roberts LM, Schwarz B, Speranza E, Leighton I, Wehrly T, Best S, Bosio CM. Pulmonary infection induces persistent, pathogen-specific lipidomic changes influencing trained immunity. iScience 2021; 24:103025. [PMID: 34522865 PMCID: PMC8426275 DOI: 10.1016/j.isci.2021.103025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/16/2021] [Accepted: 08/19/2021] [Indexed: 01/18/2023] Open
Abstract
Resolution of infection results in development of trained innate immunity which is typically beneficial for defense against unrelated secondary infection. Epigenetic changes including modification of histones via binding of various polar metabolites underlie the establishment of trained innate immunity. Therefore, host metabolism and this response are intimately linked. However, little is known regarding the influence of lipids on the development and function of trained immunity. Utilizing two models of pulmonary bacterial infection combined with multi-omic approaches, we identified persistent, pathogen-specific changes to the lung lipidome that correlated with differences in the trained immune response against a third unrelated pathogen. Further, we establish the specific cellular populations in the lung that contribute to this altered lipidome. Together these results expand our understanding of the pulmonary trained innate immune response and the contributions of host lipids in informing that response. Pathogens exert differential effects on pulmonary efferocytosis post-infection Differences in efferocytosis are mediated by macrophage subsets Unique immune lipid mediator milieus are linked to these macrophage subsets Changes in the lipid landscape impact trained immunity to an unrelated infection
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Affiliation(s)
- Lydia M Roberts
- Immunity to Pulmonary Pathogens Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, 903 S. 4th Street, Hamilton, MT 59840, USA
| | - Benjamin Schwarz
- Immunity to Pulmonary Pathogens Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, 903 S. 4th Street, Hamilton, MT 59840, USA
| | - Emily Speranza
- Lymphocyte Biology Section, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda, MD, USA.,Innate Immunity and Pathogenesis Section, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, Hamilton, MT, USA
| | - Ian Leighton
- Immunity to Pulmonary Pathogens Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, 903 S. 4th Street, Hamilton, MT 59840, USA
| | - Tara Wehrly
- Immunity to Pulmonary Pathogens Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, 903 S. 4th Street, Hamilton, MT 59840, USA
| | - Sonja Best
- Innate Immunity and Pathogenesis Section, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, Hamilton, MT, USA
| | - Catharine M Bosio
- Immunity to Pulmonary Pathogens Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Disease, National Institutes of Health, 903 S. 4th Street, Hamilton, MT 59840, USA
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13
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Hagens LA, Heijnen NFL, Smit MR, Schultz MJ, Bergmans DCJJ, Schnabel RM, Bos LDJ. Systematic review of diagnostic methods for acute respiratory distress syndrome. ERJ Open Res 2021; 7:00504-2020. [PMID: 33532455 PMCID: PMC7836439 DOI: 10.1183/23120541.00504-2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/18/2020] [Indexed: 01/10/2023] Open
Abstract
Rationale Acute respiratory distress syndrome (ARDS) is currently diagnosed by the Berlin definition, which does not include a direct measure of pulmonary oedema, endothelial permeability or pulmonary inflammation. We hypothesised that biomarkers of these processes have good diagnostic accuracy for ARDS. Methods Medline and Scopus were searched for original diagnostic studies using minimally invasive testing. Primary outcome was the diagnostic accuracy per test and was categorised by control group. The methodological quality was assessed with QUADAS-2 tool. Biomarkers that had an area under the receiver operating characteristic curve (AUROCC) of >0.75 and were studied with minimal bias against an unselected control group were considered to be promising. Results Forty-four articles were included. The median AUROCC for all evaluated tests was 0.80 (25th to 75th percentile: 0.72–0.88). The type of control group influenced the diagnostic accuracy (p=0.0095). Higher risk of bias was associated with higher diagnostic accuracy (AUROCC 0.75 for low-bias, 0.77 for intermediate-bias and 0.84 for high-bias studies; p=0.0023). Club cell protein 16 and soluble receptor for advanced glycation end-products in plasma and two panels with biomarkers of oxidative stress in breath showed good diagnostic accuracy in low-bias studies that compared ARDS patients to an unselected intensive care unit (ICU) population. Conclusion This systematic review revealed only four diagnostic tests fulfilling stringent criteria for a promising biomarker in a low-bias setting. For implementation into the clinical setting, prospective studies in a general unselected ICU population with good methodological quality are needed. Accuracy of diagnosis of acute respiratory distress syndrome (ARDS) is associated with risk of bias. There is a lack of validated diagnostic tests in an unbiased setting, emphasising the need for quality driven diagnostic research in ARDS.https://bit.ly/2GfPAvf
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Affiliation(s)
- Laura A Hagens
- Dept of Intensive Care, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Nanon F L Heijnen
- Dept of Intensive Care, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Marry R Smit
- Dept of Intensive Care, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Marcus J Schultz
- Dept of Intensive Care, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands.,Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand.,Nuffield Dept of Medicine, University of Oxford, Oxford, UK
| | - Dennis C J J Bergmans
- Dept of Intensive Care, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | | | - Lieuwe D J Bos
- Dept of Intensive Care, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands.,Dept of Respiratory Medicine, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
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14
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Oxidative Stress-Mediated Blood-Brain Barrier (BBB) Disruption in Neurological Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020. [DOI: 10.1155/2020/4356386] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The blood-brain barrier (BBB), as a crucial gate of brain-blood molecular exchange, is involved in the pathogenesis of multiple neurological diseases. Oxidative stress is caused by an imbalance between the production of reactive oxygen species (ROS) and the scavenger system. Since oxidative stress plays a significant role in the production and maintenance of the BBB, the cerebrovascular system is especially vulnerable to it. The pathways that initiate BBB dysfunction include, but are not limited to, mitochondrial dysfunction, excitotoxicity, iron metabolism, cytokines, pyroptosis, and necroptosis, all converging on the generation of ROS. Interestingly, ROS also provide common triggers that directly regulate BBB damage, parameters including tight junction (TJ) modifications, transporters, matrix metalloproteinase (MMP) activation, inflammatory responses, and autophagy. We will discuss the role of oxidative stress-mediated BBB disruption in neurological diseases, such as hemorrhagic stroke, ischemic stroke (IS), Alzheimer’s disease (AD), Parkinson’s disease (PD), traumatic brain injury (TBI), amyotrophic lateral sclerosis (ALS), and cerebral small vessel disease (CSVD). This review will also discuss the latest clinical evidence of potential biomarkers and antioxidant drugs towards oxidative stress in neurological diseases. A deeper understanding of how oxidative stress damages BBB may open up more therapeutic options for the treatment of neurological diseases.
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15
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Glebov OO. Tonic NMDA receptor signalling shapes endosomal organisation in mammalian cells. Sci Rep 2020; 10:9315. [PMID: 32518335 PMCID: PMC7283358 DOI: 10.1038/s41598-020-66071-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 04/21/2020] [Indexed: 12/02/2022] Open
Abstract
Calcium signalling through NMDA-type glutamate receptors (NMDARs) plays a key role in synaptic plasticity in the central nervous system (CNS). NMDAR expression has also been detected in other tissues and aberrant glutamate signalling has been linked to cancer; however, the significance of NMDAR function outside of the CNS remains unclear. Here, I show that removal of extracellular calcium rapidly decreases the size of early endosomes in primary human fibroblasts. This effect can be mimicked by blockade of NMDA-type glutamate receptors but not voltage-gated calcium channels (VGCCs), and can also be observed in primary hippocampal neurons and Jurkat T cells. Conversely, in a breast cancer cell line MDA-MB-231 NMDAR blockade results in an increase in endosomal size and decrease in number. These findings reveal that calcium signalling via glutamate receptors controls the structure of the endosomal system and suggest that aberrations in NMDAR-regulated membrane trafficking may be associated with cancer.
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Affiliation(s)
- Oleg O Glebov
- Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Qingdao, 266071, Shandong, China. .,Department of Old Age Psychiatry, Institute of Psychiatry, Psychology & Neuroscience, King's College London, 16 De Crespigny Park, London, SE5 8AF, UK.
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16
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van der Zee P, Rietdijk W, Somhorst P, Endeman H, Gommers D. A systematic review of biomarkers multivariately associated with acute respiratory distress syndrome development and mortality. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2020; 24:243. [PMID: 32448370 PMCID: PMC7245629 DOI: 10.1186/s13054-020-02913-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 04/22/2020] [Indexed: 12/13/2022]
Abstract
Background Heterogeneity of acute respiratory distress syndrome (ARDS) could be reduced by identification of biomarker-based phenotypes. The set of ARDS biomarkers to prospectively define these phenotypes remains to be established. Objective To provide an overview of the biomarkers that were multivariately associated with ARDS development or mortality. Data sources We performed a systematic search in Embase, MEDLINE, Web of Science, Cochrane CENTRAL, and Google Scholar from inception until 6 March 2020. Study selection Studies assessing biomarkers for ARDS development in critically ill patients at risk for ARDS and mortality due to ARDS adjusted in multivariate analyses were included. Data extraction and synthesis We included 35 studies for ARDS development (10,667 patients at risk for ARDS) and 53 for ARDS mortality (15,344 patients with ARDS). These studies were too heterogeneous to be used in a meta-analysis, as time until outcome and the variables used in the multivariate analyses varied widely between studies. After qualitative inspection, high plasma levels of angiopoeitin-2 and receptor for advanced glycation end products (RAGE) were associated with an increased risk of ARDS development. None of the biomarkers (plasma angiopoeitin-2, C-reactive protein, interleukin-8, RAGE, surfactant protein D, and Von Willebrand factor) was clearly associated with mortality. Conclusions Biomarker data reporting and variables used in multivariate analyses differed greatly between studies. Angiopoeitin-2 and RAGE in plasma were positively associated with increased risk of ARDS development. None of the biomarkers independently predicted mortality. Therefore, we suggested to structurally investigate a combination of biomarkers and clinical parameters in order to find more homogeneous ARDS phenotypes. PROSPERO identifier PROSPERO, CRD42017078957
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Affiliation(s)
- Philip van der Zee
- Department of Adult Intensive Care, Erasmus Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands.
| | - Wim Rietdijk
- Department of Adult Intensive Care, Erasmus Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Peter Somhorst
- Department of Adult Intensive Care, Erasmus Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Henrik Endeman
- Department of Adult Intensive Care, Erasmus Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Diederik Gommers
- Department of Adult Intensive Care, Erasmus Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
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17
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Reduction in Blood Glutamate Levels Combined With the Genetic Inactivation of A2AR Significantly Alleviate Traumatic Brain Injury-Induced Acute Lung Injury. Shock 2020; 51:502-510. [PMID: 29688987 DOI: 10.1097/shk.0000000000001170] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Traumatic brain injury-induced acute lung injury (TBI-ALI) is a serious complication of traumatic brain injury (TBI). Our previous clinical study found that high levels of blood glutamate after TBI were closely related to the occurrence and severity of TBI-ALI, while it remains unknown whether a high concentration of blood glutamate directly causes or aggravates TBI-ALI. We found that inhibition of the adenosine A2A receptor (A2AR) after brain injury alleviated the TBI-ALI; however, it is unknown whether lowering blood glutamate levels in combination with inhibiting the A2AR would lead to better effects. Using mouse models of moderate and severe TBI, we found that intravenous administration of L-glutamate greatly increased the lung water content, lung-body index, level of inflammatory markers in bronchoalveolar lavage fluid and acute lung injury score and significantly decreased the PaO2/FiO2 ratio. Moreover, the incidence of TBI-ALI and the mortality rate were significantly increased, and the combined administration of A2AR activator and exogenous glutamate further exacerbated the above damaging effects. Conversely, lowering the blood glutamate level through peritoneal dialysis or intravenous administration of oxaloacetate notably improved the above parameters, and a further improvement was seen with concurrent A2AR genetic inactivation. These data suggest that A2AR activation aggravates the damaging effect of high blood glutamate concentrations on the lung and that combined treatment targeting both A2AR and blood glutamate may be an effective way to prevent and treat TBI-ALI.
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18
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A New Perspective on Using Glycols in Glutamate Biosensor Design: From Stabilizing Agents to a New Containment Net. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors8020023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Glutamate is a major excitatory neurotransmitter in the brain. It is involved in many normal physiological brain activities, but also neurological disorders and excitotoxicity. Hence, glutamate measurement is important both in clinical and pre-clinical studies. Pre-clinical studies often use amperometric biosensors due to their low invasiveness and the relatively small size of the devices. These devices also provide fast, real-time measurements because of their high sensitivity. In the present study, diethylene glycol (DEG), neopentyl glycol (NPG), triethylene glycol (TEG), and glycerol (GLY) were used to increase the long-term stability of glutamate biosensors. The evaluation was made by measuring variations of the main enzymatic (VMAX and KM) and analytical (Linear Region Slope (LRS)) parameters. Of the glycols tested, TEG was the most promising stabilizer, showing about twice as high VMAX maintained over a greater duration than with other stabilizers tested. It is also yielded the most stable linear region slope (LRS) values over the study duration. Moreover, we highlighted the ability of glycols to interact with enzyme molecules to form a containment network, able to maintain all the layered components of the biosensor adhering to the transducer.
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19
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Del Arroyo AG, Hadjihambi A, Sanchez J, Turovsky E, Kasymov V, Cain D, Nightingale TD, Lambden S, Grant SGN, Gourine AV, Ackland GL. NMDA receptor modulation of glutamate release in activated neutrophils. EBioMedicine 2019; 47:457-469. [PMID: 31401196 PMCID: PMC6796524 DOI: 10.1016/j.ebiom.2019.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 01/05/2023] Open
Abstract
Background Neutrophil depletion improves neurologic outcomes in experimental sepsis/brain injury. We hypothesized that neutrophils may exacerbate neuronal injury through the release of neurotoxic quantities of the neurotransmitter glutamate. Methods Real-time glutamate release by primary human neutrophils was determined using enzymatic biosensors. Bacterial and direct protein-kinase C (Phorbol 12-myristate 13-acetate; PMA) activation of neutrophils in human whole blood, isolated neutrophils or human cell lines were compared in the presence/absence of N-Methyl-d-aspartic acid receptor (NMDAR) antagonists. Bacterial and direct activation of neutrophils from wild-type and transgenic murine neutrophils deficient in NMDAR-scaffolding proteins were compared using flow cytometry (phagocytosis, reactive oxygen species (ROS) generation) and real-time respirometry (oxygen consumption). Findings Both glutamate and the NMDAR co-agonist d-serine are rapidly released by neutrophils in response to bacterial and PMA-induced activation. Pharmacological NMDAR blockade reduced both the autocrine release of glutamate, d-serine and the respiratory burst by activated primary human neutrophils. A highly specific small-molecule inhibitor ZL006 that limits NMDAR-mediated neuronal injury also reduced ROS by activated neutrophils in a murine model of peritonitis, via uncoupling of the NMDAR GluN2B subunit from its' scaffolding protein, postsynaptic density protein-95 (PSD-95). Genetic ablation of PSD-95 reduced ROS production by activated murine neutrophils. Pharmacological blockade of the NMDAR GluN2B subunit reduced primary human neutrophil activation induced by Pseudomonas fluorescens, a glutamate-secreting Gram-negative bacillus closely related to pathogens that cause hospital-acquired infections. Interpretation These data suggest that release of glutamate by activated neutrophils augments ROS production in an autocrine manner via actions on NMDAR expressed by these cells. Fund GLA: Academy Medical Sciences/Health Foundation Clinician Scientist. AVG is a Wellcome Trust Senior Research Fellow. Neutrophil depletion improves neurologic outcome after injury and infection. Pharmacologic NMDAR blockade reduces rapid autocrine release of glutamate/d-serine from activated neutrophils. Genetic ablation/small-molecule inhibition of PSD-95 reduces neutrophil ROS. NMDAR blockade reduces human neutrophil activated by glutamate-secreting bacteria. Activated neutrophils may exacerbate neuronal injury in various forms of critical illness through the release of glutamate.
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Affiliation(s)
- Ana Gutierrez Del Arroyo
- Translational Medicine and Therapeutics, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Anna Hadjihambi
- Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom
| | - Jenifer Sanchez
- Translational Medicine and Therapeutics, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Egor Turovsky
- Institute of Cell Biophysics, Federal Research Center, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, Russia
| | - Vitaly Kasymov
- Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom
| | - David Cain
- Clinical Physiology, Department of Medicine, University College London, United Kingdom
| | - Tom D Nightingale
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Simon Lambden
- Clinical Physiology, Department of Medicine, University College London, United Kingdom
| | - Seth G N Grant
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh EH16 4SB, United Kingdom
| | - Alexander V Gourine
- Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom
| | - Gareth L Ackland
- Translational Medicine and Therapeutics, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London WC1E 6BT, United Kingdom.
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20
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Malfussi H, Santana IV, Gasparotto J, Righy C, Tomasi CD, Gelain DP, Bozza FA, Walz R, Dal-Pizzol F, Ritter C. Anti-NMDA Receptor Autoantibody Is an Independent Predictor of Hospital Mortality but Not Brain Dysfunction in Septic Patients. Front Neurol 2019; 10:221. [PMID: 30930837 PMCID: PMC6428735 DOI: 10.3389/fneur.2019.00221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 02/20/2019] [Indexed: 12/21/2022] Open
Abstract
The presence of autoantibodies against neuronal cell surface or synaptic proteins and their relationship to autoimmune encephalitis have recently been characterized. These autoantibodies have been also reported in other pathologic conditions; however, their role during sepsis is not known. This study detected the presence of autoantibodies against neuronal cell surface or synaptic proteins in the serum of septic patients and determined their relationship to the occurrence of brain dysfunction and mortality. This prospective, observational cohort study was performed in four Brazilian intensive care units (ICUs). Sixty patients with community-acquired severe sepsis or septic shock admitted to the ICU were included. Blood samples were collected from patients within 24 h of ICU admission. Antibodies to six neuronal proteins were assessed, including glutamate receptors (types NMDA, AMPA1, and AMPA2); voltage-gated potassium channel complex (VGKC) proteins, leucine-rich glioma-inactivated protein 1 (LGI1), and contactin-associated protein-2 (Caspr2), as well as the GABAB1 receptor. There was no independent association between any of the measured autoantibodies and the occurrence of brain dysfunction (delirium or coma). However, there was an independent and significant relationship between anti-NMDAR fluorescence intensity and hospital mortality. In conclusion, anti-NMDAR was independently associated with hospital mortality but none of the measured antibodies were associated with brain dysfunction in septic patients.
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Affiliation(s)
- Hamilton Malfussi
- Programa de Pós-Graduação em Ciências Médicas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Iara Vidigal Santana
- Laboratório de Fisiopatologia Experimental, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Juciano Gasparotto
- Departamento de Bioquímica, Centro de Estudos em Estresse Oxidativo, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Cassia Righy
- Instituto Estadual do Cérebro Paulo Niemeyer, Rio de Janeiro, Brazil.,Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Cristiane Damiani Tomasi
- Laboratório de Fisiopatologia Experimental, Universidade do Extremo Sul Catarinense, Criciúma, Brazil.,Grupo de Pesquisa em Gestão do Cuidado, Integralidade e Educação na Saúde (GECIES) - Programa de Pós-Graduação em Saúde Coletiva, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Daniel Pens Gelain
- Departamento de Bioquímica, Centro de Estudos em Estresse Oxidativo, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernando A Bozza
- Instituto Estadual do Cérebro Paulo Niemeyer, Rio de Janeiro, Brazil.,Instituto D'Or de Pesquisa e Ensino (IDOR), Rua Diniz Cordeiro, Rio de Janeiro, Brazil
| | - Roger Walz
- Serviço de Neurologia, Departamento de Clínica Médica, Centro de Cirurgia de Epilepsia de Santa Catarina (CEPESC), Centro de Neurociências Aplicadas (CeNAp), Hospital Universitário (HU), Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil
| | - Felipe Dal-Pizzol
- Laboratório de Fisiopatologia Experimental, Universidade do Extremo Sul Catarinense, Criciúma, Brazil.,Hospital São José, Criciúma, Brazil
| | - Cristiane Ritter
- Laboratório de Fisiopatologia Experimental, Universidade do Extremo Sul Catarinense, Criciúma, Brazil.,Hospital São José, Criciúma, Brazil
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21
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Shadlaghani A, Farzaneh M, Kinser D, Reid RC. Direct Electrochemical Detection of Glutamate, Acetylcholine, Choline, and Adenosine Using Non-Enzymatic Electrodes. SENSORS (BASEL, SWITZERLAND) 2019; 19:E447. [PMID: 30678261 PMCID: PMC6387276 DOI: 10.3390/s19030447] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/06/2019] [Accepted: 01/18/2019] [Indexed: 02/06/2023]
Abstract
Non-electroactive neurotransmitters such as glutamate, acetylcholine, choline, and adenosine play a critical role in proper activity of living organisms, particularly in the nervous system. While enzyme-based sensing of this type of neurotransmitter has been a research interest for years, non-enzymatic approaches are gaining more attention because of their stability and low cost. Accordingly, this focused review aims to give a summary of the state of the art of non-enzymatic electrochemical sensors used for detection of neurotransmitter that lack an electrochemically active component. In place of using enzymes, transition metal materials such as those based on nickel show an acceptable level of catalytic activity for neurotransmitter sensing. They benefit from fast electron transport properties and high surface energy and their catalytic activity can be much improved if their surface is modified with nanomaterials such as carbon nanotubes and platinum nanoparticles. However, a general comparison reveals that the performance of non-enzymatic biosensors is still lower than those that use enzyme-based methods. Nevertheless, their excellent stability demonstrates that non-enzymatic neurotransmitter sensors warrant additional research in order to advance them toward becoming an acceptable replacement for the more expensive enzyme-based sensors.
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Affiliation(s)
- Arash Shadlaghani
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76209, USA.
| | - Mahsa Farzaneh
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76209, USA.
| | - Dacen Kinser
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76209, USA.
| | - Russell C Reid
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76209, USA.
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22
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Xu FF, Zhang ZB, Wang YY, Wang TH. Brain-Derived Glia Maturation Factor β Participates in Lung Injury Induced by Acute Cerebral Ischemia by Increasing ROS in Endothelial Cells. Neurosci Bull 2018; 34:1077-1090. [PMID: 30191459 PMCID: PMC6246848 DOI: 10.1007/s12264-018-0283-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 05/03/2018] [Indexed: 02/05/2023] Open
Abstract
Brain damage can cause lung injury. To explore the mechanism underlying the lung injury induced by acute cerebral ischemia (ACI), we established a middle cerebral artery occlusion (MCAO) model in male Sprague-Dawley rats. We focused on glia maturation factor β (GMFB) based on quantitative analysis of the global rat serum proteome. Polymerase chain reaction, western blotting, and immunofluorescence revealed that GMFB was over-expressed in astrocytes in the brains of rats subjected to MCAO. We cultured rat primary astrocytes and confirmed that GMFB was also up-regulated in primary astrocytes after oxygen-glucose deprivation (OGD). We subjected the primary astrocytes to Gmfb RNA interference before OGD and collected the conditioned medium (CM) after OGD. We then used the CM to culture pulmonary microvascular endothelial cells (PMVECs) acquired in advance and assessed their status. The viability of the PMVECs improved significantly when Gmfb was blocked. Moreover, ELISA assays revealed an elevation in GMFB concentration in the medium after OGD. Cell cultures containing recombinant GMFB showed increased levels of reactive oxygen species and a deterioration in the state of the cells. In conclusion, GMFB is up-regulated in astrocytes after ACI, and brain-derived GMFB damages PMVECs by increasing reactive oxygen species. GMFB might thus be an initiator of the lung injury induced by ACI.
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Affiliation(s)
- Fei-Fei Xu
- Institute of Neurological Disease, Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Zi-Bin Zhang
- Institute of Neurological Disease, Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yang-Yang Wang
- Institute of Neurological Disease, Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Ting-Hua Wang
- Institute of Neurological Disease, Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, 610041, China.
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Blockade of glutamate receptor ameliorates lipopolysaccharide-induced sepsis through regulation of neuropeptides. Biosci Rep 2018; 38:BSR20171629. [PMID: 29440461 PMCID: PMC5938426 DOI: 10.1042/bsr20171629] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 01/25/2018] [Accepted: 02/12/2018] [Indexed: 11/23/2022] Open
Abstract
Glutamate receptors (N-methyl-d-aspartate receptor (NMDAR)) are expressed mainly in the central nervous system (CNS), but several potentially important exceptions are worth mentioning. Recently, NMDAR, a glutamate receptor, has been reported to be found in the lungs. NMDAR is activated in acute lung injury (ALI). Here, the present experiment was designed to examine whether NMDAR blockade (MK-801) ameliorates ALI through affecting neuropeptides in LPS-induced sepsis animal models. Male Kunming mice were divided into control group, LPS group, control + MK-801 group, and LPS + MK-801 group. Bronchoalveolar lavage fluid (BALF) was collected and evaluated. The lung histological pathology was assayed by immunocytochemistry staining. Western blot was used to measure PGP9.5, substance P (SP), and vasoactive intestinal polypeptide (VIP). Results showed that LPS-induced mice animal models were ameliorated by co-treatment with the MK-801, an uncompetitive NMDAR antagonist. Moreover, the protective effects of MK-801 attributed to the increased secretion of VIP and decreased secretion of SP. The results of the present study indicated that the blockade of NMDAR may represent a promising therapeutic strategy for the treatment of sepsis-associated ALI through regulation of neuropeptides.
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Bai W, Zhou YG. Homeostasis of the Intraparenchymal-Blood Glutamate Concentration Gradient: Maintenance, Imbalance, and Regulation. Front Mol Neurosci 2017; 10:400. [PMID: 29259540 PMCID: PMC5723322 DOI: 10.3389/fnmol.2017.00400] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 11/20/2017] [Indexed: 12/25/2022] Open
Abstract
It is widely accepted that glutamate is the most important excitatory neurotransmitter in the central nervous system (CNS). However, there is also a large amount of glutamate in the blood. Generally, the concentration gradient of glutamate between intraparenchymal and blood environments is stable. However, this gradient is dramatically disrupted under a variety of pathological conditions, resulting in an amplifying cascade that causes a series of pathological reactions in the CNS and peripheral organs. This eventually seriously worsens a patient’s prognosis. These two “isolated” systems are rarely considered as a whole even though they mutually influence each other. In this review, we summarize what is currently known regarding the maintenance, imbalance and regulatory mechanisms that control the intraparenchymal-blood glutamate concentration gradient, discuss the interrelationships between these systems and further explore their significance in clinical practice.
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Affiliation(s)
- Wei Bai
- Molecular Biology Center, State Key Laboratory of Trauma, Burn, and Combined Injury, Research Institute of Surgery and Daping Hospital, Third Military Medical University, Chongqing, China
| | - Yuan-Guo Zhou
- Molecular Biology Center, State Key Laboratory of Trauma, Burn, and Combined Injury, Research Institute of Surgery and Daping Hospital, Third Military Medical University, Chongqing, China
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