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Lee J, Sasaki F, Koike E, Cho M, Lee Y, Dho SH, Lee J, Lee E, Toyohara E, Sunakawa M, Ishibashi M, Hung HH, Nishioka S, Komine R, Okura C, Shimizu M, Ikawa M, Yoshimura A, Morita R, Kim LK. Gelsolin alleviates rheumatoid arthritis by negatively regulating NLRP3 inflammasome activation. Cell Death Differ 2024:10.1038/s41418-024-01367-6. [PMID: 39179640 DOI: 10.1038/s41418-024-01367-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 08/15/2024] [Accepted: 08/21/2024] [Indexed: 08/26/2024] Open
Abstract
Despite numerous biomarkers being proposed for rheumatoid arthritis (RA), a gap remains in our understanding of their mechanisms of action. In this study, we discovered a novel role for gelsolin (GSN), an actin-binding protein whose levels are notably reduced in the plasma of RA patients. We elucidated that GSN is a key regulator of NLRP3 inflammasome activation in macrophages, providing a plausible explanation for the decreased secretion of GSN in RA patients. We found that GSN interacts with NLRP3 in LPS-primed macrophages, hence modulating the formation of the NLRP3 inflammasome complex. Reducing GSN expression significantly enhanced NLRP3 inflammasome activation. GSN impeded NLRP3 translocation to the mitochondria; it contributed to the maintenance of intracellular calcium equilibrium and mitochondrial stability. This maintenance is crucial for controlling the inflammatory response associated with RA. Furthermore, the exacerbation of arthritic symptoms in GSN-deficient mice indicates the potential of GSN as both a diagnostic biomarker and a therapeutic target. Moreover, not limited to RA models, GSN has demonstrated a protective function in diverse disease models associated with the NLRP3 inflammasome. Myeloid cell-specific GSN-knockout mice exhibited aggravated inflammatory responses in models of MSU-induced peritonitis, folic acid-induced acute tubular necrosis, and LPS-induced sepsis. These findings suggest novel therapeutic approaches that modulate GSN activity, offering promise for more effective management of RA and a broader spectrum of inflammatory conditions.
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Affiliation(s)
- Jiyeon Lee
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Fumiyuki Sasaki
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Eri Koike
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Minjeong Cho
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yeongun Lee
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - So Hee Dho
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jina Lee
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eunji Lee
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eri Toyohara
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Mika Sunakawa
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Mariko Ishibashi
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Huynh Hiep Hung
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Saki Nishioka
- Immunology Frontier Research Center, Osaka University, Suita, Japan
| | - Ritsuko Komine
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Chiaki Okura
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Masumi Shimizu
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan
| | - Masahito Ikawa
- Immunology Frontier Research Center, Osaka University, Suita, Japan
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Rimpei Morita
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo, Japan.
| | - Lark Kyun Kim
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Schuermans S, Kestens C, Marques PE. Systemic mechanisms of necrotic cell debris clearance. Cell Death Dis 2024; 15:557. [PMID: 39090111 PMCID: PMC11294570 DOI: 10.1038/s41419-024-06947-5] [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: 03/27/2024] [Revised: 07/23/2024] [Accepted: 07/24/2024] [Indexed: 08/04/2024]
Abstract
Necrosis is an overarching term that describes cell death modalities caused by (extreme) adverse conditions in which cells lose structural integrity. A guaranteed consequence of necrosis is the production of necrotic cell remnants, or debris. Necrotic cell debris is a strong trigger of inflammation, and although inflammatory responses are required for tissue healing, necrotic debris may lead to uncontrolled immune responses and collateral damage. Besides local phagocytosis by recruited leukocytes, there is accumulating evidence that extracellular mechanisms are also involved in necrotic debris clearance. In this review, we focused on systemic clearance mechanisms present in the bloodstream and vasculature that often cooperate to drive the clearance of cell debris. We reviewed the contribution and cooperation of extracellular DNases, the actin-scavenger system, the fibrinolytic system and reticuloendothelial cells in performing clearance of necrotic debris. Moreover, associations of the (mis)functioning of these clearance systems with a variety of diseases were provided, illustrating the importance of the mechanisms of clearance of dead cells in the organism.
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Affiliation(s)
- Sara Schuermans
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Caine Kestens
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Pedro Elias Marques
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium.
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Nguyen MT, Dash R, Jeong K, Lee W. Role of Actin-Binding Proteins in Skeletal Myogenesis. Cells 2023; 12:2523. [PMID: 37947600 PMCID: PMC10650911 DOI: 10.3390/cells12212523] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/22/2023] [Accepted: 10/23/2023] [Indexed: 11/12/2023] Open
Abstract
Maintenance of skeletal muscle quantity and quality is essential to ensure various vital functions of the body. Muscle homeostasis is regulated by multiple cytoskeletal proteins and myogenic transcriptional programs responding to endogenous and exogenous signals influencing cell structure and function. Since actin is an essential component in cytoskeleton dynamics, actin-binding proteins (ABPs) have been recognized as crucial players in skeletal muscle health and diseases. Hence, dysregulation of ABPs leads to muscle atrophy characterized by loss of mass, strength, quality, and capacity for regeneration. This comprehensive review summarizes the recent studies that have unveiled the role of ABPs in actin cytoskeletal dynamics, with a particular focus on skeletal myogenesis and diseases. This provides insight into the molecular mechanisms that regulate skeletal myogenesis via ABPs as well as research avenues to identify potential therapeutic targets. Moreover, this review explores the implications of non-coding RNAs (ncRNAs) targeting ABPs in skeletal myogenesis and disorders based on recent achievements in ncRNA research. The studies presented here will enhance our understanding of the functional significance of ABPs and mechanotransduction-derived myogenic regulatory mechanisms. Furthermore, revealing how ncRNAs regulate ABPs will allow diverse therapeutic approaches for skeletal muscle disorders to be developed.
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Affiliation(s)
- Mai Thi Nguyen
- Department of Biochemistry, Dongguk University College of Medicine, 123 Dongdae-ro, Gyeongju 38066, Republic of Korea; (M.T.N.); (K.J.)
| | - Raju Dash
- Department of Anatomy, Dongguk University College of Medicine, 123 Dongdae-ro, Gyeongju 38066, Republic of Korea;
- Department of New Biology, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Republic of Korea
| | - Kyuho Jeong
- Department of Biochemistry, Dongguk University College of Medicine, 123 Dongdae-ro, Gyeongju 38066, Republic of Korea; (M.T.N.); (K.J.)
| | - Wan Lee
- Department of Biochemistry, Dongguk University College of Medicine, 123 Dongdae-ro, Gyeongju 38066, Republic of Korea; (M.T.N.); (K.J.)
- Channelopathy Research Center, Dongguk University College of Medicine, 32 Dongguk-ro, Ilsan Dong-gu, Goyang 10326, Republic of Korea
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Onuma T, Asare-Werehene M, Yoshida Y, Tsang BK. Exosomal Plasma Gelsolin Is an Immunosuppressive Mediator in the Ovarian Tumor Microenvironment and a Determinant of Chemoresistance. Cells 2022; 11:cells11203305. [PMID: 36291171 PMCID: PMC9600545 DOI: 10.3390/cells11203305] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/15/2022] [Accepted: 10/18/2022] [Indexed: 12/03/2022] Open
Abstract
Ovarian Cancer (OVCA) is the most fatal gynecologic cancer and has a 5-year survival rate less than 45%. This is mainly due to late diagnosis and drug resistance. Overexpression of plasma gelsolin (pGSN) is key contributing factor to OVCA chemoresistance and immunosuppression. Gelsolin (GSN) is a multifunctional protein that regulates the activity of actin filaments by cleavage, capping, and nucleation. Generally, it plays an important role in cytoskeletal remodeling. GSN has three isoforms: cytosolic GSN, plasma GSN (pGSN), and gelsolin-3. Exosomes containing pGSN are released and contribute to the progression of OVCA. This review describes how pGSN overexpression inhibits chemotherapy-induced apoptosis and triggers positive feedback loops of pGSN expression. It also describes the mechanisms by which exosomal pGSN promotes apoptosis and dysfunction in tumor-killing immune cells. A discussion on the potential of pGSN as a prognostic, diagnostic, and therapeutic marker is also presented herein.
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Affiliation(s)
- Toshimichi Onuma
- Department of Obstetrics & Gynecology, Faculty of Medicine & Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1H 8L1, Canada
- Department of Cellular and Molecular Medicine & the Centre for Infection, Immunity and Inflammation (CI3), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Obstetrics and Gynecology, University of Fukui, Fukui 910-8507, Japan
| | - Meshach Asare-Werehene
- Department of Obstetrics & Gynecology, Faculty of Medicine & Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1H 8L1, Canada
- Department of Cellular and Molecular Medicine & the Centre for Infection, Immunity and Inflammation (CI3), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Yoshio Yoshida
- Department of Obstetrics and Gynecology, University of Fukui, Fukui 910-8507, Japan
- Correspondence: (Y.Y.); (B.K.T.)
| | - Benjamin K. Tsang
- Department of Obstetrics & Gynecology, Faculty of Medicine & Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1H 8L1, Canada
- Department of Cellular and Molecular Medicine & the Centre for Infection, Immunity and Inflammation (CI3), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Correspondence: (Y.Y.); (B.K.T.)
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Strandberg TE, Levinson SL, DiNubile MJ, Jyväkorpi S, Kivimäki M. Association of plasma gelsolin with frailty phenotype and mortality among octogenarian community-dwelling men: a cohort study. Aging Clin Exp Res 2022; 34:1095-1101. [PMID: 35169987 PMCID: PMC9135837 DOI: 10.1007/s40520-022-02083-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 01/23/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Biomarkers are needed for frailty, a common phenotype often associated with muscle loss in older people. Plasma gelsolin (pGSN) is a protein largely synthesized and secreted by skeletal muscle. AIMS To investigate whether pGSN could be a biomarker of the frailty phenotype and predict mortality. METHODS A homogenous cohort of males (born 1919-1934, baseline n = 3490) has been followed since the 1960s. In 2010/11, frailty phenotypes by modified Fried criteria were assessed. pGSN was measured in a convenience subset (n = 469, mean age 83) and re-measured in survivors (n = 127) in 2017. Mortality through December 31, 2018 was retrieved from national registers. Regression models were used for analyses. RESULTS Of 469 males, 152 (32.4%) were robust, 284 (60.6%) prefrail, and 33 (7.0%) frail in 2010/11. There was a graded (p = 0.018) association between pGSN (mean 58.1 ug/mL, SD 9.3) and frailty. After multivariable adjustment, higher pGSN levels were associated with lower odds of having contemporaneous phenotypic prefrailty (OR per 1 SD 0.73, 95% CI 0.58-0.92) and frailty (OR per 1 SD 0.70, 95% CI 0.44-1.11). By 2018, 179 males (38.2%) had died, and higher baseline pGSN predicted a lower 7-year mortality rate (HR per 1 SD 0.85, 95% CI 0.72-1.00). pGSN concentrations in 2010/11 and 2017 were correlated (n = 127, r = 0.34, p < 0.001). DISCUSSION Higher baseline pGSN concentrations were associated with a persistently robust phenotype and lower mortality rate over 7 years in a cohort of octogenarian males with high socioeconomic status and may be a promising laboratory biomarker for the development of a frailty phenotype.
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Affiliation(s)
- Timo E Strandberg
- Helsinki University Hospital, HUS, University of Helsinki, PO Box 340, FI-00029, Helsinki, Finland. .,Center for Life Course Health Research, University of Oulu, Oulu, Finland.
| | | | | | - Satu Jyväkorpi
- Helsinki University Hospital, HUS, University of Helsinki, PO Box 340, FI-00029, Helsinki, Finland
| | - Mika Kivimäki
- Helsinki University Hospital, HUS, University of Helsinki, PO Box 340, FI-00029, Helsinki, Finland.,Clinicum, Faculty of Medicine, PO Box 20, FI-00014, Helsinki, Finland
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Giampazolias E, Schulz O, Lim KHJ, Rogers NC, Chakravarty P, Srinivasan N, Gordon O, Cardoso A, Buck MD, Poirier EZ, Canton J, Zelenay S, Sammicheli S, Moncaut N, Varsani-Brown S, Rosewell I, Reis e Sousa C. Secreted gelsolin inhibits DNGR-1-dependent cross-presentation and cancer immunity. Cell 2021; 184:4016-4031.e22. [PMID: 34081922 PMCID: PMC8320529 DOI: 10.1016/j.cell.2021.05.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/24/2021] [Accepted: 05/17/2021] [Indexed: 12/30/2022]
Abstract
Cross-presentation of antigens from dead tumor cells by type 1 conventional dendritic cells (cDC1s) is thought to underlie priming of anti-cancer CD8+ T cells. cDC1 express high levels of DNGR-1 (a.k.a. CLEC9A), a receptor that binds to F-actin exposed by dead cell debris and promotes cross-presentation of associated antigens. Here, we show that secreted gelsolin (sGSN), an extracellular protein, decreases DNGR-1 binding to F-actin and cross-presentation of dead cell-associated antigens by cDC1s. Mice deficient in sGsn display increased DNGR-1-dependent resistance to transplantable tumors, especially ones expressing neoantigens associated with the actin cytoskeleton, and exhibit greater responsiveness to cancer immunotherapy. In human cancers, lower levels of intratumoral sGSN transcripts, as well as presence of mutations in proteins associated with the actin cytoskeleton, are associated with signatures of anti-cancer immunity and increased patient survival. Our results reveal a natural barrier to cross-presentation of cancer antigens that dampens anti-tumor CD8+ T cell responses.
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Affiliation(s)
- Evangelos Giampazolias
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Oliver Schulz
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Kok Haw Jonathan Lim
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK; Department of Immunology and Inflammation, Imperial College London, Du Cane Road, London W12 0NN, UK
| | - Neil C Rogers
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Probir Chakravarty
- Bioinformatics and Biostatistics, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Naren Srinivasan
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Oliver Gordon
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Ana Cardoso
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Michael D Buck
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Enzo Z Poirier
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Johnathan Canton
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Santiago Zelenay
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Stefano Sammicheli
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Natalia Moncaut
- Genetic Modification Services, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Sunita Varsani-Brown
- Genetic Modification Services, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Ian Rosewell
- Genetic Modification Services, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Caetano Reis e Sousa
- Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
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Plasma Gelsolin Reinforces the Diagnostic Value of FGF-21 and GDF-15 for Mitochondrial Disorders. Int J Mol Sci 2021; 22:ijms22126396. [PMID: 34203775 PMCID: PMC8232645 DOI: 10.3390/ijms22126396] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 12/12/2022] Open
Abstract
Mitochondrial disorders (MD) comprise a group of heterogeneous clinical disorders for which non-invasive diagnosis remains a challenge. Two protein biomarkers have so far emerged for MD detection, FGF-21 and GDF-15, but the identification of additional biomarkers capable of improving their diagnostic accuracy is highly relevant. Previous studies identified Gelsolin as a regulator of cell survival adaptations triggered by mitochondrial defects. Gelsolin presents a circulating plasma isoform (pGSN), whose altered levels could be a hallmark of mitochondrial dysfunction. Therefore, we investigated the diagnostic performance of pGSN for MD relative to FGF-21 and GDF-15. Using ELISA assays, we quantified plasma levels of pGSN, FGF-21, and GDF-15 in three age- and gender-matched adult cohorts: 60 genetically diagnosed MD patients, 56 healthy donors, and 41 patients with unrelated neuromuscular pathologies (non-MD). Clinical variables and biomarkers’ plasma levels were compared between groups. Discrimination ability was calculated using the area under the ROC curve (AUC). Optimal cut-offs and the following diagnostic parameters were determined: sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios, and efficiency. Comprehensive statistical analyses revealed significant discrimination ability for the three biomarkers to classify between MD and healthy individuals, with the best diagnostic performance for the GDF-15/pGSN combination. pGSN and GDF-15 preferentially discriminated between MD and non-MD patients under 50 years, whereas FGF-21 best classified older subjects. Conclusion: pGSN improves the diagnosis accuracy for MD provided by FGF-21 and GDF-15.
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Sivapalan P, Bonnesen B, Jensen JU. Novel Perspectives Regarding the Pathology, Inflammation, and Biomarkers of Acute Respiratory Distress Syndrome. Int J Mol Sci 2020; 22:E205. [PMID: 33379178 PMCID: PMC7796016 DOI: 10.3390/ijms22010205] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 12/29/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is an acute inflammation of the lung resulting from damage to the alveolar-capillary membrane, and it is diagnosed using a combination of clinical and physiological variables. ARDS develops in approximately 10% of hospitalised patients with pneumonia and has a mortality rate of approximately 40%. Recent research has identified several biomarkers associated with ARDS pathophysiology, and these may be useful for diagnosing and monitoring ARDS. They may also highlight potential therapeutic targets. This review summarises our current understanding of those clinical biomarkers: (1) biomarkers of alveolar and bronchiolar injury, (2) biomarkers of endothelial damage and coagulation, and (3) biomarkers for treatment responses.
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Affiliation(s)
- Pradeesh Sivapalan
- Respiratory Medicine Section, Department of Internal Medicine, Herlev and Gentofte Hospital, University of Copenhagen, 2900 Hellerup, Denmark; (B.B.); (J.-U.J.)
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Safety and Pharmacokinetics of Recombinant Human Plasma Gelsolin in Patients Hospitalized for Nonsevere Community-Acquired Pneumonia. Antimicrob Agents Chemother 2020; 64:AAC.00579-20. [PMID: 32690640 DOI: 10.1128/aac.00579-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 07/11/2020] [Indexed: 12/30/2022] Open
Abstract
There remains an unmet need to address the substantial morbidity and mortality associated with severe community-acquired pneumonia (sCAP). Recombinant human plasma gelsolin (rhu-pGSN) improves disease outcomes in diverse animal models of infectious and noninfectious inflammation. This blinded dose-escalation safety study involved non-intensive care unit (ICU) patients admitted for mild CAP and randomized 3:1 to receive adjunctive rhu-pGSN or placebo intravenously. Thirty-three subjects were treated: 8 in the single-dose phase and 25 in the multidose phase. For the single-dose phase, rhu-pGSN at 6 mg/kg of body weight was administered once. For the multidose phase, a daily rhu-pGSN dose of 6, 12, or 24 mg/kg was given on 3 consecutive days. Adverse events (AEs) were generally mild in both treatment groups irrespective of dose. The only serious AE (SAE) in the single-dose phase was a non-drug-related pneumonia in a rhu-pGSN recipient who died after institution of comfort care. One single-dose placebo recipient had a drug-related AE (maculo-papular rash). In the multidose phase, there were 2 SAEs in 1 placebo recipient, including a fatal pulmonary embolism. In the 18 rhu-pGSN recipients in the multidose phase, there were no serious or drug-related AEs, and nausea and increased blood pressure were each reported in 2 patients. The median rhu-pGSN half-life exceeded 17 h with all dosing regimens, and supraphysiologic levels were maintained throughout the 24-h dosing interval in the 2 highest dosing arms. Rhu-pGSN was well tolerated overall in CAP patients admitted to non-ICU beds, justifying a larger proof-of-concept trial in an ICU population admitted with sCAP. (This study has been registered at ClinicalTrials.gov under identifier NCT03466073.).
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Abstract
Background: Gelsolin is an actin-scavenger controlling the tissue damage from actin in the blood. Gelsolin levels in circulation drops when tissue damage and corresponding actin release is pronounced due to catabolic conditions. The purpose of this study was to determine if low plasma gelsolin independently predicts a reduced chance of weaning from ventilator-demanding respiratory failure in critically ill patients within 28 days from admission. Results: This cohort study included 746 critically ill patients with ventilator-demanding respiratory failure from the randomized clinical trial, “Procalcitonin And Survival Study (PASS).” Primary end point was successful weaning from mechanical ventilation within 28 days. We used multivariable Cox regression adjusted for age, sepsis, PaO2/FiO2 ratio and other known and suspected predictors of persistent respiratory failure. Follow-up was complete. For medical patients, baseline-gelsolin below the 25th percentile independently predicted a 40% lower chance of successful weaning within 28 days (HR 0.60, 95% CI 0.46–0.79, P = 0.0002); among surgical patients this end point was not predicted. Low gelsolin levels predicted chance of being “alive and out of intensive care at day 14” for both medical and surgical patients (HR 0.69, 95% CI 0.54–0.89, P = 0.004). Gelsolin levels did not predict 28 day mortality for surgical or medical patients. Conclusions: Low levels of serum gelsolin independently predict a decreased chance of successful weaning from ventilator within 28 days among medical intensive care patients. This finding has implications for identifying patients who need individualized intervention early in intensive care course to prevent unfavorable lung prognosis in acute respiratory failure. Trial registration: This is a substudy to the PASS, Clinicaltrials.gov ID: NCT00271752, first registered January 1, 2006.
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DiNubile MJ, Levinson SL, Stossel TP, Lawrenz MB, Warawa JM. Recombinant Human Plasma Gelsolin Improves Survival and Attenuates Lung Injury in a Murine Model of Multidrug-Resistant Pseudomonas aeruginosa Pneumonia. Open Forum Infect Dis 2020; 7:ofaa236. [PMID: 32766380 PMCID: PMC7397834 DOI: 10.1093/ofid/ofaa236] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/11/2020] [Indexed: 12/13/2022] Open
Abstract
Background Plasma gelsolin (pGSN) is an abundant circulating protein quickly consumed by extensive tissue damage. Marked depletion is associated with later poor outcomes in diverse clinical circumstances. Repletion with recombinant human (rhu)-pGSN in animal models of inflammation lessens mortality and morbidity. Methods Neutropenic mice were treated with different meropenem doses ±12 mg of rhu-pGSN commencing 1 day before an intratracheal challenge with multidrug-resistant Pseudomonas aeruginosa. Survival, bacterial counts, and pulmonary pathology were compared between corresponding meropenem groups with and without rhu-pGSN. Results Overall survival was 35/64 (55%) and 46/64 (72%) in mice given meropenem without and with rhu-pGSN, respectively (Δ = 17%; 95% CI, 1-34). In control mice receiving meropenem 1250 mg/kg/d where the majority died, the addition of rhu-pGSN increased survival from 5/16 (31%) to 12/16 (75%) (Δ = 44%; 95% CI, 13-75). Survival with minor lung injury was found in 26/64 (41%) mice receiving only meropenem, vs 38/64 (59%) in mice given meropenem plus rhu-pGSN (Δ = 19%; 95% CI, 2-36). Conclusions In a series of dose-ranging experiments, both mortality and lung injury were reduced by the addition of rhu-pGSN to meropenem against carbapenem-resistant P. aeruginosa. Rhu-pGSN offers a novel candidate therapy for antibiotic-resistant pneumonia.
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Affiliation(s)
| | | | | | - Matthew B Lawrenz
- Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Jonathan M Warawa
- Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, Kentucky, USA
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Chiu CT, Wang PW, Asare-Werehene M, Tsang BK, Shieh DB. Circulating Plasma Gelsolin: A Predictor of Favorable Clinical Outcomes in Head and Neck Cancer and Sensitive Biomarker for Early Disease Diagnosis Combined with Soluble Fas Ligand. Cancers (Basel) 2020; 12:cancers12061569. [PMID: 32545773 PMCID: PMC7353036 DOI: 10.3390/cancers12061569] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 12/30/2022] Open
Abstract
Head and neck cancer (HNC) accounts for more than 330,000 cancer deaths annually worldwide. Despite late diagnosis being a major factor contributing to HNC mortality, no satisfactory biomarkers exist for early disease detection. Cytoplasmic gelsolin (cGSN) was discovered to predict disease progression in HNC and other malignancies, and circulating plasma gelsolin (pGSN) levels are significantly correlated with infectious and inflammatory disease prognoses. Here, the plasma levels of five candidate biomarkers (circulating pGSN, squamous cell carcinoma antigen, cytokeratin 19 fragment, soluble Fas, and soluble Fas ligand (sFasL)) in 202 patients with HNC and 45 healthy controls were measured using enzyme-linked immunosorbent assay or Millipore cancer multiplex assay. The results demonstrated that circulating pGSN levels were significantly lower in patients with HNC than in healthy controls. Moreover, circulating pGSN outperformed other candidate biomarkers as an independent diagnostic biomarker of HNC in both sensitivity (82.7%) and specificity (95.6%). Receiver operating characteristic curves indicated that combined pGSN and sFasL levels further augmented this sensitivity (90.6%) for early disease detection. Moreover, higher pGSN levels predicted improved prognosis at both 5-year overall survival and progression-free survival. In conclusion, circulating pGSN could be an independent predictor of favorable clinical outcomes and a novel biomarker for the early HNC detection in combination with sFasL.
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Affiliation(s)
- Chen-Tzu Chiu
- Institute of Basic Medical Sciences, National Cheng Kung University, Tainan 70101, Taiwan;
| | - Pei-Wen Wang
- Institute of Oral Medicine and Department of Stomatology, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan 70101, Taiwan;
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Meshach Asare-Werehene
- Departments of Obstetrics & Gynecology and Cellular & Molecular Medicine, University of Ottawa, Ottawa, ON K1H 8L6, Canada; (M.A.-W.); (B.K.T.)
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Benjamin K. Tsang
- Departments of Obstetrics & Gynecology and Cellular & Molecular Medicine, University of Ottawa, Ottawa, ON K1H 8L6, Canada; (M.A.-W.); (B.K.T.)
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Dar-Bin Shieh
- Institute of Basic Medical Sciences, National Cheng Kung University, Tainan 70101, Taiwan;
- Institute of Oral Medicine and Department of Stomatology, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan 70101, Taiwan;
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan
- Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan
- Correspondence: ; Tel.: +886-6-235-3535 (ext. 5899)
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13
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Eguchi A, Fukuda S, Kuratsune H, Nojima J, Nakatomi Y, Watanabe Y, Feldstein AE. Identification of actin network proteins, talin-1 and filamin-A, in circulating extracellular vesicles as blood biomarkers for human myalgic encephalomyelitis/chronic fatigue syndrome. Brain Behav Immun 2020; 84:106-114. [PMID: 31759091 PMCID: PMC7010541 DOI: 10.1016/j.bbi.2019.11.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 10/24/2019] [Accepted: 11/18/2019] [Indexed: 01/14/2023] Open
Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a serious, debilitating disorder with a wide spectrum of symptoms, including pain, depression, and neurocognitive deterioration. Over 17 million people around the world have ME/CFS, predominantly women with peak onset at 30-50 years. Given the wide spectrum of symptoms and unclear etiology, specific biomarkers for diagnosis and stratification of ME/CFS are lacking. Here we show that actin network proteins in circulating extracellular vesicles (EVs) offer specific non-invasive biomarkers for ME/CFS. We found that circulating EVs were significantly increased in ME/CFS patients correlating to C-reactive protein, as well as biological antioxidant potential. Area under the receiver operating characteristic curve for circulating EVs was 0.80, allowing correct diagnosis in 90-94% of ME/CFS cases. From two independent proteomic analyses using circulating EVs from ME/CFS, healthy controls, idiopathic chronic fatigue, and depression, proteins identified from ME/CFS patients are involved in focal adhesion, actin skeletal regulation, PI3K-Akt signaling pathway, and Epstein-Barr virus infection. In particular, talin-1, filamin-A, and 14-3-3 family proteins were the most abundant proteins, representing highly specific ME/CFS biomarkers. Our results identified circulating EV number and EV-specific proteins as novel biomarkers for diagnosing ME/CFS, providing important information on the pathogenic mechanisms of ME/CFS.
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Affiliation(s)
- Akiko Eguchi
- Department of Gastroenterology and Hepatology, School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie 514-8507, Japan; JST, PRETO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan; Department of Pediatrics, University of California San Diego (UCSD), La Jolla, CA 92093, USA.
| | - Sanae Fukuda
- Department of Health Welfare Sciences, Kansai University of Welfare Sciences, Kashiwara, 582-0026, JAPAN.,Department of Endocrinology, Metabolism and Molecular Medicine, Osaka City University Graduate School of Medicine, Osaka, 545-8586, JAPAN.,RIKEN, Center for Biosystems Dynamics Research, Kobe, 650-0047, JAPAN
| | - Hirohiko Kuratsune
- Department of Health Welfare Sciences, Kansai University of Welfare Sciences, Kashiwara, 582-0026, JAPAN.,Department of Endocrinology, Metabolism and Molecular Medicine, Osaka City University Graduate School of Medicine, Osaka, 545-8586, JAPAN
| | - Junzo Nojima
- Department of Laboratory Science, Yamaguchi University Graduate School of Medicine, Yamaguchi, 755-8505, JAPAN
| | | | - Yasuyoshi Watanabe
- Department of Endocrinology, Metabolism and Molecular Medicine, Osaka City University Graduate School of Medicine, Osaka, 545-8586, JAPAN.,RIKEN, Center for Biosystems Dynamics Research, Kobe, 650-0047, JAPAN.,RIKEN Compass to Healthy Life Research Complex Program, Kobe, 650-0047, JAPAN
| | - Ariel E. Feldstein
- Department of Pediatrics, University of California San Diego (UCSD), La Jolla, CA 92093, USA
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14
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Murray DD, Itenov TS, Sivapalan P, Eklöf JV, Holm FS, Schuetz P, Jensen JU. Biomarkers of Acute Lung Injury The Individualized Approach: for Phenotyping, Risk Stratification and Treatment Surveillance. J Clin Med 2019; 8:jcm8081163. [PMID: 31382587 PMCID: PMC6722821 DOI: 10.3390/jcm8081163] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/30/2019] [Accepted: 08/01/2019] [Indexed: 02/06/2023] Open
Abstract
Do we need biomarkers of lung damage and infection: For what purpose and how should they be used properly? Biomarkers of lung damage can be used for diagnosis, risk stratification/prediction, treatment surveillance and adjustment of targeted therapy. Additionally, novel "omics" methods may offer a completely different and effective way of improving the understanding of pathogenesis of lung damage and a way to develop new candidate lung damage biomarkers. In the current review, we give an overview within the field of acute lung damage of (i) disease mechanism biomarkers, (ii) of "ready to use" evidence-based biomarker-guided lung infection management, (iii) of novel strategies of inflammatory phenotyping and how this can be used to tailor corticosteroid treatment, (iv) a future perspective of where "omics" technologies and mindsets may become increasingly important in developing new strategies for treatment and for understanding the development of acute lung damage.
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Affiliation(s)
- Daniel D Murray
- PERSIMUNE, Department of Infectious Diseases, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | | | - Pradeesh Sivapalan
- Respiratory Medicine Section, Department of Internal Medicine, Herlev-Gentofte Hospital, DK-2900 Hellerup, Denmark
| | - Josefin Viktoria Eklöf
- Respiratory Medicine Section, Department of Internal Medicine, Herlev-Gentofte Hospital, DK-2900 Hellerup, Denmark
| | - Freja Stæhr Holm
- Respiratory Medicine Section, Department of Internal Medicine, Herlev-Gentofte Hospital, DK-2900 Hellerup, Denmark
| | - Philipp Schuetz
- Medical University Department, Kantonsspital Aarau, 5001 Aarau, Switzerland
- Faculty of Medicine, University of Basel, 4001 Basel, Switzerland
| | - Jens Ulrik Jensen
- PERSIMUNE, Department of Infectious Diseases, Rigshospitalet, DK-2100 Copenhagen, Denmark.
- Respiratory Medicine Section, Department of Internal Medicine, Herlev-Gentofte Hospital, DK-2900 Hellerup, Denmark.
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15
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Lu H, Deng S, Zheng M, Hu K. iTRAQ plasma proteomics analysis for candidate biomarkers of type 2 incipient diabetic nephropathy. Clin Proteomics 2019; 16:33. [PMID: 31384238 PMCID: PMC6668123 DOI: 10.1186/s12014-019-9253-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/22/2019] [Indexed: 12/11/2022] Open
Abstract
Background Diabetic nephropathy is the most frequent cause of end-stage renal disease worldwide. Identification of biomarkers for diabetic nephropathy for early diagnosis may be the key to avoiding damage from this condition. Methods Proteomic iTRAQ technology was first used to identify differentially expressed plasma proteins in type 2 incipient diabetic nephropathy (IDN) using a Q-Exactive mass spectrometer. Results Compared with controls, 57 proteins (32 upregulated and 25 downregulated proteins) were identified. Furthermore, the gelsolin, collectin-11, PTPRJ, and AKAP-7 proteins were confirmed by Western blots as candidate biomarkers for type 2 IDN through ROC analysis. Conclusions These findings offer a theoretical basis for the early treatment of diabetic nephropathy.
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Affiliation(s)
- Hongmei Lu
- 1The Second Clinical Medical College, Guangdong Medical University, Dongguan, 523808 China
| | - Shaodong Deng
- 1The Second Clinical Medical College, Guangdong Medical University, Dongguan, 523808 China
| | - Minghui Zheng
- 2Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, 510120 China
| | - Kunhua Hu
- 3Proteomics Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080 China
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16
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Protective effects of gelsolin in acute pulmonary thromboembolism and thrombosis in the carotid artery of mice. PLoS One 2019; 14:e0215717. [PMID: 31002695 PMCID: PMC6474609 DOI: 10.1371/journal.pone.0215717] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 04/09/2019] [Indexed: 12/23/2022] Open
Abstract
The present study provides first evidence on the role of plasma gelsolin in protecting pulmonary thromboembolism and thrombosis in a mouse model. Gelsolin is the most abundant actin depolymerizing protein in plasma and its significantly depleted values have been reported in metabolic disorders including cardiovascular diseases and myocardial infarction. Though gelsolin replacement therapy (GRT) has been shown to be effective in some animal models, no such study has been reported for thrombotic diseases that are acutely in need of bio-therapeutics for immediate and lasting relief. Here, using mice model and recombinant human gelsolin (rhuGSN), we demonstrate the antithrombotic effect of gelsolin in ferric chloride induced thrombosis in carotid artery and thrombin induced acute pulmonary thromboembolism. In thrombosis model, arterial occlusion time was significantly enhanced upon subcutaneous (SC) treatment with 8 mg of gelsolin per mice viz. 15.83 minutes vs. 8 minutes in the placebo group. Pertinently, histopathological examination showed channel formation within the thrombi in the carotid artery following injection of gelsolin. Fluorescence molecular tomography imaging further confirmed that administration of gelsolin reduced thrombus formation following carotid artery injury. In thrombin-induced acute pulmonary thromboembolism, mice pretreated with aspirin or gelsolin showed 100 and 83.33% recovery, respectively. In contrast, complete mortality of mice was observed in vehicle treated group within 5 minutes of thrombin injection. Overall, our studies provide conclusive evidence on the thrombo-protective role of plasma gelsolin in mice model of pulmonary thromboembolism and thrombosis.
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17
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Abstract
Woundhealing disorders characterized by impaired or delayed re-epithelialization are a serious medical problem that is painful and difficult to treat. Gelsolin (GSN), a known actin modulator, supports epithelial cell regeneration and apoptosis. The aim of this study was to estimate the potential of recombinant gelsolin (rhu-pGSN) for ocular surface regeneration to establish a novel therapy for delayed or complicated wound healing. We analyzed the influence of gelsolin on cell proliferation and wound healing in vitro, in vivo/ex vivo and by gene knockdown. Gelsolin is expressed in all tested tissues of the ocular system as shown by molecular analysis. The concentration of GSN is significantly increased in tear fluid samples of patients with dry eye disease. rhu-pGSN induces cell proliferation and faster wound healing in vitro as well as in vivo/ex vivo. TGF-β dependent transcription of SMA is significantly decreased after GSN gene knockdown. Gelsolin is an inherent protein of the ocular system and is secreted into the tear fluid. Our results show a positive effect on corneal cell proliferation and wound healing. Furthermore, GSN regulates the synthesis of SMA in myofibroblasts, which establishes GSN as a key protein of TGF-β dependent cell differentiation.
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18
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Plasma Gelsolin: Indicator of Inflammation and Its Potential as a Diagnostic Tool and Therapeutic Target. Int J Mol Sci 2018; 19:ijms19092516. [PMID: 30149613 PMCID: PMC6164782 DOI: 10.3390/ijms19092516] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/14/2018] [Accepted: 08/18/2018] [Indexed: 12/19/2022] Open
Abstract
Gelsolin, an actin-depolymerizing protein expressed both in extracellular fluids and in the cytoplasm of a majority of human cells, has been recently implicated in a variety of both physiological and pathological processes. Its extracellular isoform, called plasma gelsolin (pGSN), is present in blood, cerebrospinal fluid, milk, urine, and other extracellular fluids. This isoform has been recognized as a potential biomarker of inflammatory-associated medical conditions, allowing for the prediction of illness severity, recovery, efficacy of treatment, and clinical outcome. A compelling number of animal studies also demonstrate a broad spectrum of beneficial effects mediated by gelsolin, suggesting therapeutic utility for extracellular recombinant gelsolin. In the review, we summarize the current data related to the potential of pGSN as an inflammatory predictor and therapeutic target, discuss gelsolin-mediated mechanisms of action, and highlight recent progress in the clinical use of pGSN.
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19
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Garg R, Peddada N, Dolma K, Khatri N, Ashish. Pregnancy-related hormones, progesterone and human chorionic gonadotrophin, upregulate expression of maternal plasma gelsolin. Am J Physiol Regul Integr Comp Physiol 2018; 314:R509-R522. [PMID: 29341830 DOI: 10.1152/ajpregu.00131.2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Plasma gelsolin (pGSN), a protein primarily involved in clearance of circulating actin filaments, is an upcoming novel biomarker. Its level changes in multiple disease and injury conditions, attributable mainly to its consumption during actin clearance; the endogenous regulation of its expression, however, remains elusive as well as unexplored. Here, we are reporting the first isolation of the promoter region of pGSN gene and investigation of its transcriptional regulation during pregnancy (a natural process associated with a well-programmed injury course of parturition). Interestingly, two of the pregnancy-related hormones, human chorionic gonadotrophin (hCG) and progesterone, significantly upregulated pGSN promoter activity in muscle cells. This action of both hormones was found to mediate through their respective cellular receptors and involved a contribution of multiple signaling pathways including those of protein kinase A, protein kinase C, epidermal growth factor receptor and prostaglandin-endoperoxidase synthase 2 in the case of hCG-mediated upregulation. This novel upregulation was further supported by elevated levels of endogenous pGSN transcripts as well as secreted protein upon hormonal treatments of muscle cells compared with untreated controls. A participation of pGSN promoter cis-elements, capable of interacting with endogenous transcription factors, Ap1, Sp1, and p300, was also observed during this hormonal upregulation. Additionally, the augmented pGSN levels observed in pregnant mice compared with the control animals further supported an upregulation of this protein during pregnancy, implicating vital role(s) played by pGSN during this period in mammals.
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Affiliation(s)
- Renu Garg
- Council of Scientific and Industrial Research-Institute of Microbial Technology , Chandigarh , India
| | - Nagesh Peddada
- Council of Scientific and Industrial Research-Institute of Microbial Technology , Chandigarh , India
| | - Kunzes Dolma
- Council of Scientific and Industrial Research-Institute of Microbial Technology , Chandigarh , India
| | - Neeraj Khatri
- Council of Scientific and Industrial Research-Institute of Microbial Technology , Chandigarh , India
| | - Ashish
- Council of Scientific and Industrial Research-Institute of Microbial Technology , Chandigarh , India
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20
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Wątek M, Durnaś B, Wollny T, Pasiarski M, Góźdź S, Marzec M, Chabowska A, Wolak P, Żendzian-Piotrowska M, Bucki R. Unexpected profile of sphingolipid contents in blood and bone marrow plasma collected from patients diagnosed with acute myeloid leukemia. Lipids Health Dis 2017; 16:235. [PMID: 29216917 PMCID: PMC5721620 DOI: 10.1186/s12944-017-0624-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Accepted: 11/27/2017] [Indexed: 01/21/2023] Open
Abstract
Background Impaired apoptotic pathways in leukemic cells enable them to grow in an uncontrolled way. Moreover, aberrations in the apoptotic pathways are the main factor of leukemic cells drug resistance. Methods To assess the presence of potential abnormalities that might promote dysfunction of leukemic cells growth, HPLC system was used to determine sphingosine (SFO), sphinganine (SFA), sphingosine-1-phosphate (S1P) and ceramide (CER) concentration in the blood collected from patients diagnose with acute myeloblastic leukemia (AML; n = 49) and compare to values of control (healthily) group (n = 51). Additionally, in AML group concentration of SFO, SFA, S1P and CER was determined in bone marrow plasma and compared to respective values in blood plasma. The concentration of S1P and CER binding protein – plasma gelsolin (GSN) was also assessed in collected samples using immunoblotting assay. Results We observed that in AML patients the average SFO, SFA and CER concentration in blood plasma was significantly higher (p < 0.001) compare to control group, when blood plasma S1P concentration was significantly lower (p < 0.001). At the same time the CER/S1P ratio in AML patient (44.5 ± 19.4) was about 54% higher compare to control group (20.9 ± 13.1). Interestingly the average concentration of S1P in blood plasma (196 ± 13 pmol/ml) was higher compare to its concentration in plasma collected from bone marrow (154 ± 21 pmol/ml). Conclusions We hypothesize that changes in profile of sphingolipids concentration and some of their binding protein partners such as GSN in extracellular environment of blood and bone marrow cells in leukemic patients can be targeted to develop new AML treatment method(s).
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Affiliation(s)
- Marzena Wątek
- Department of Hematology, Holy Cross Oncology Center of Kielce, Artwińskiego 3, 25-734, Kielce, Poland
| | - Bonita Durnaś
- Faculty of Medicine and Health Sciences of the Jan Kochanowski University in Kielce, Kielce, Poland
| | - Tomasz Wollny
- Department of Hematology, Holy Cross Oncology Center of Kielce, Artwińskiego 3, 25-734, Kielce, Poland
| | - Marcin Pasiarski
- Department of Hematology, Holy Cross Oncology Center of Kielce, Artwińskiego 3, 25-734, Kielce, Poland.,Faculty of Medicine and Health Sciences of the Jan Kochanowski University in Kielce, Kielce, Poland
| | - Stanisław Góźdź
- Department of Hematology, Holy Cross Oncology Center of Kielce, Artwińskiego 3, 25-734, Kielce, Poland.,Faculty of Medicine and Health Sciences of the Jan Kochanowski University in Kielce, Kielce, Poland
| | - Michał Marzec
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Anna Chabowska
- Regional Blood Transfusion Center in Bialystok, 15-950, Bialystok, Poland
| | - Przemysław Wolak
- Faculty of Medicine and Health Sciences of the Jan Kochanowski University in Kielce, Kielce, Poland
| | - Małgorzata Żendzian-Piotrowska
- Department of Hygiene, Epidemiology and Ergonomics Department Medical University of Bialystok, 15-222, Bialystok, Poland
| | - Robert Bucki
- Faculty of Medicine and Health Sciences of the Jan Kochanowski University in Kielce, Kielce, Poland. .,Department of Microbiological and Nanobiomedical Engineering, Medical University of Bialystok, 15-222, Bialystok, Poland.
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21
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Meyer K, Kwon YC, Ray RB, Ray R. N-terminal gelsolin fragment potentiates TRAIL mediated death in resistant hepatoma cells. Sci Rep 2017; 7:12803. [PMID: 28993697 PMCID: PMC5634413 DOI: 10.1038/s41598-017-13131-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 09/19/2017] [Indexed: 01/10/2023] Open
Abstract
TNF-α related apoptosis-inducing ligand (TRAIL) selectively kills tumor cells, without damaging normal cells. TRAIL receptors facilitate induction of apoptosis for selective elimination of malignant cells. However, some cancer cells have developed resistances to TRAIL which limits anticancer potential. Gelsolin, a multifunctional actin-binding protein, mediates cell death involving the TRAIL receptors in the hepatic stellate cell line, LX2. Here, we have shown that conditioned medium (CM) containing gelsolin fragments or an N-terminal gelsolin fragment (amino acid residues 1-70) in the presence of TRAIL impairs cell viability of TRAIL resistant transformed human hepatocytes (HepG2). Cell growth regulation by CM and TRAIL was associated with the modulation of p53/Mdm2, Erk and Akt phosphorylation status. The use of N-terminal gelsolin peptide1-70 alone or in combination with TRAIL, induced inhibition of Akt phosphorylation and key survival factors, Mdm2 and Survivin. Treatment of cells with an Akt activator SC79 or p53 siRNA reduced the effects of the N-terminal gelsolin fragment and TRAIL. Together, our study suggests that the N-terminal gelsolin fragment enhances TRAIL-induced loss of cell viability by inhibiting phosphorylation of Akt and promoting p53 function, effecting cell survival.
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Affiliation(s)
- Keith Meyer
- Departments of Internal Medicine and Pathology, Saint Louis University, Missouri, USA
| | - Young-Chan Kwon
- Departments of Internal Medicine and Pathology, Saint Louis University, Missouri, USA
| | - Ratna B Ray
- Pathology, Saint Louis University, Missouri, USA
| | - Ranjit Ray
- Departments of Internal Medicine and Pathology, Saint Louis University, Missouri, USA.
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22
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Horváth-Szalai Z, Kustán P, Szirmay B, Lakatos Á, Christensen PH, Huber T, Bugyi B, Mühl D, Ludány A, Miseta A, Kovács GL, Kőszegi T. Validation of an automated immune turbidimetric assay for serum gelsolin and its possible clinical utility in sepsis. J Clin Lab Anal 2017; 32. [PMID: 28872708 DOI: 10.1002/jcla.22321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 08/10/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Studies showing the potential predictive value of the actin-binding protein gelsolin, in critically ill patients are scarce. Moreover, even up to now a rapid automated measurement of gelsolin has still remained a challenge. Therefore, we developed and validated an automated serum gelsolin immune turbidimetric assay for possible clinical use. METHODS Validation of serum gelsolin assay was performed on a Cobas 8000/c502 analyzer (Roche) according to the second edition of Eurachem guidelines. Furthermore, we also studied the diagnostic value of serum gelsolin in sepsis when investigating sera of septic (n = 25), systemic inflammatory response syndrome (SIRS; n = 8) and control patients (n = 14). We compared our previously published Western blot data with those of the new turbidimetric assay. RESULTS The sample volume was 7 μL and the assay time was 10 minutes. The detection limit was 0.72 mg/L, intra- and inter-assay imprecision remained in most cases less than 5% expressed as CV. Recovery was found to be 84.56%-93.52% and linearity study gave an appropriate correlation coefficient by linear regression analysis (r2 = .998). Septic patients exhibited lower (P = .015) first-day serum gelsolin levels than SIRS patients, which confirmed our previous Western blot results. The determined cut-off point for serum gelsolin was 14.05 mg/L (sensitivity: 75%; specificity: 60%) when investigating its diagnostic value in sepsis. CONCLUSION Based on the results, our immune turbidimetric measurement offers a rapid and accurate quantitation of gelsolin in human serum samples. Serum gelsolin seems a promising additional diagnostic marker of sepsis which has to be further investigated.
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Affiliation(s)
| | - Péter Kustán
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary.,Department of Anaesthesiology and Intensive Therapy, University of Pécs, Pécs, Hungary
| | - Balázs Szirmay
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary
| | - Ágnes Lakatos
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary
| | | | - Tamás Huber
- Department of Biophysics, University of Pécs, Pécs, Hungary
| | - Beáta Bugyi
- Department of Biophysics, University of Pécs, Pécs, Hungary.,János Szentágothai Research Center, University of Pécs, Pécs, Hungary
| | - Diána Mühl
- Department of Anaesthesiology and Intensive Therapy, University of Pécs, Pécs, Hungary
| | - Andrea Ludány
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary
| | - Attila Miseta
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary
| | - Gábor L Kovács
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary.,János Szentágothai Research Center, University of Pécs, Pécs, Hungary
| | - Tamás Kőszegi
- Department of Laboratory Medicine, University of Pécs, Pécs, Hungary.,János Szentágothai Research Center, University of Pécs, Pécs, Hungary
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23
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Mikami M, Zhang Y, Danielsson J, Joell T, Yong HM, Townsend E, Khurana S, An SS, Emala CW. Impaired Relaxation of Airway Smooth Muscle in Mice Lacking the Actin-Binding Protein Gelsolin. Am J Respir Cell Mol Biol 2017; 56:628-636. [PMID: 28118027 DOI: 10.1165/rcmb.2016-0292oc] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Diverse classes of ligands have recently been discovered that relax airway smooth muscle (ASM) despite a transient increase in intracellular calcium concentrations ([Ca2+]i). However, the cellular mechanisms are not well understood. Gelsolin is a calcium-activated actin-severing and -capping protein found in many cell types, including ASM cells. Gelsolin also binds to phosphatidylinositol 4,5-bisphosphate, making this substrate less available for phospholipase Cβ-mediated hydrolysis to inositol triphosphate and diacylglycerol. We hypothesized that gelsolin plays a critical role in ASM relaxation and mechanistically accounts for relaxation by ligands that transiently increase [Ca2+]i. Isolated tracheal rings from gelsolin knockout (KO) mice showed impaired relaxation to both a β-agonist and chloroquine, a bitter taste receptor agonist, which relaxes ASM, despite inducing transiently increased [Ca2+]i. A single inhalation of methacholine increased lung resistance to a similar extent in wild-type and gelsolin KO mice, but the subsequent spontaneous relaxation was less in gelsolin KO mice. In ASM cells derived from gelsolin KO mice, serotonin-induced Gq-coupled activation increased both [Ca2+]i and inositol triphosphate synthesis to a greater extent compared to cells from wild-type mice, possibly due to the absence of gelsolin binding to phosphatidylinositol 4,5-bisphosphate. Single-cell analysis showed higher filamentous:globular actin ratio at baseline and slower cytoskeletal remodeling dynamics in gelsolin KO cells. Gelsolin KO ASM cells also showed an attenuated decrease in cell stiffness to chloroquine and flufenamic acid. These findings suggest that gelsolin plays a critical role in ASM relaxation and that activation of gelsolin may contribute to relaxation induced by ligands that relax ASM despite a transient increase in [Ca2+]i.
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Affiliation(s)
- Maya Mikami
- 1 Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, New York
| | - Yi Zhang
- 1 Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, New York
| | - Jennifer Danielsson
- 1 Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, New York
| | - Tiarra Joell
- 2 Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Hwan Mee Yong
- 2 Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Elizabeth Townsend
- 1 Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, New York
| | - Seema Khurana
- 3 Department of Biology and Biochemistry, University of Houston, Baylor College of Medicine, Houston, Texas; and
| | - Steven S An
- 2 Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.,4 Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Charles W Emala
- 1 Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, New York
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Overexpression of GSN could decrease inflammation and apoptosis in EAE and may enhance vitamin D therapy on EAE/MS. Sci Rep 2017; 7:604. [PMID: 28377587 PMCID: PMC5428824 DOI: 10.1038/s41598-017-00684-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 03/15/2017] [Indexed: 01/09/2023] Open
Abstract
The decrease of gelsolin (GSN) in the blood has been reported in multiple sclerosis (MS) patients and experimental allergic encephalomyelitis (EAE) animals, but the protective effect of GSN on EAE/MS lacks of evidence. In our study, we increased the GSN level in EAE by injecting GSN-overexpress lentivirus (LV-GSN) into the lateral ventricle and caudal vein and found that GSN administration can delay the onset and decrease the severity of EAE. Vitamin D is proven to have a therapeutic effect on MS/EAE; however, we previously found that vitamin D caused a downregulation of GSN, which might limit vitamin D efficacy. In our current research, we obtained a better symptom and a slowing down progression in EAE after combining vitamin D treatment with a proper increase of GSN. Furthermore, we discovered that the mediation of vitamin D on GSN might occur through the vitamin D receptor (VDR) by using gene interruption and overexpression to regulate the level of VDR in PC12 cells (a rat sympathetic nerve cell line). We also confirmed the anti-apoptotic function of GSN by GSN RNA interference in PC12. Collectively, these results support the therapeutic effect of GSN in EAE, which might enhance Vitamin D therapy in EAE/MS.
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25
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Tékus É, Váczi M, Horváth-Szalai Z, Ludány A, Kőszegi T, Wilhelm M. Plasma Actin, Gelsolin and Orosomucoid Levels after Eccentric Exercise. J Hum Kinet 2017; 56:99-108. [PMID: 28469748 PMCID: PMC5384057 DOI: 10.1515/hukin-2017-0027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The present study investigated the acute effect of eccentric exercise on blood plasma actin, gelsolin (GSN) and orosomucoid (AGP) levels in untrained and moderately trained individuals, and their correlation with exercise induced muscle damage (EIMD) markers (CK, intensity of muscle soreness and maximal voluntary contraction torque deficit). Healthy physical education students (6 untrained, 12 moderately trained) participated in this research. Actin, GSN, AGP and CK levels were measured in blood plasma at baseline, immediately, 1 h, 6 h and 24 h post-exercise comprising 90 eccentric quadriceps contractions performed on a dynamometer. There was significant time main effect for GSN, AGP, CK and significant difference was found between baseline and the lowest value of post-exercise GSN (p < 0.05), as well as baseline and the highest value of post-exercise AGP (p < 0.05). Relationships were found between GSN levels and other indirect EIMD markers (between all GSN levels at post-exercise and CK activity at 6 h, p < 0.05; GSNMIN and muscle soreness at post-exercise, p < 0.04), GSN and AGP; however, actin did not correlate at any time points with GSN. Actin, GSN, AGP and CK responses after eccentric exercise do not seem sensitive to training status. The plasma actin level is used as an indicator of injury, however, our results suggest that it is not an accurate marker of EIMD, while plasma GSN concentrations show a better relationship with EIMD and the post-exercise inflammatory process. The elevated plasma AGP and the correlation between GSN and AGP seem to be promising for assessment of exercise-induced muscle injury.
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Affiliation(s)
- Éva Tékus
- Institute of Sport Sciences and Physical Education, University of Pécs, Pécs, Hungary.,Doctoral School of Biology and Sportbiology, University of Pécs, Pécs, Hungary
| | - Márk Váczi
- Institute of Sport Sciences and Physical Education, University of Pécs, Pécs, Hungary
| | | | - Andrea Ludány
- Institute of Laboratory Medicine, University of Pécs, Pécs, Hungary
| | - Tamás Kőszegi
- Institute of Laboratory Medicine, University of Pécs, Pécs, Hungary.,János Szentágothai Research Center, Pécs, Hungary
| | - Márta Wilhelm
- Institute of Sport Sciences and Physical Education, University of Pécs, Pécs, Hungary
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26
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Horváth-Szalai Z, Kustán P, Mühl D, Ludány A, Bugyi B, Kőszegi T. Antagonistic sepsis markers: Serum gelsolin and actin/gelsolin ratio. Clin Biochem 2016; 50:127-133. [PMID: 27823961 DOI: 10.1016/j.clinbiochem.2016.10.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/27/2016] [Accepted: 10/28/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVES For appropriate sepsis care, prognostic laboratory markers are mandatory. The aim of our study was to evaluate the predictive value of serum actin, gelsolin and the recently defined actin/gelsolin ratio during sepsis by comparison it to classical clinical and inflammatory laboratory parameters. DESIGN & METHODS We analyzed sera of severe septic (n=32) and SIRS (n=12) patients for 5days. Ophthalmologic patients (n=27) served as controls. Besides serum actin, gelsolin and actin/gelsolin ratios classical laboratory parameters (WBC count, serum procalcitonin, hsCRP) and clinical scores (APACHE II, SAPS II, SOFA), were also assessed. RESULTS Septic patients showed significantly decreased first-day gelsolin levels and increased actin/gelsolin ratios compared to SIRS patients (p<0.05), furthermore, non-survivors had significantly lower gelsolin levels compared to survivors (p<0.05). Non-survivors had 11.4-fold higher 2nd day actin/gelsolin ratios than survivors. Besides procalcitonin (PCT) and hsCRP, gelsolin and actin/gelsolin ratios also proved to be useful in discriminating SIRS from sepsis in the ICU (p<0.05). Gelsolin had similar prognostic value to PCT when assessing 7-day mortality and the predictive capacity of the first-day actin/gelsolin ratios was similar to that of APACHE II score regarding ICU mortality in severe sepsis. CONCLUSIONS Serum gelsolin and actin/gelsolin ratio might serve as efficient complementary prognostic markers in sepsis. However, for daily clinical usage, an automated laboratory assay of actin and gelsolin is still needed to be developed.
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Affiliation(s)
- Zoltán Horváth-Szalai
- Department of Laboratory Medicine, University of Pécs, 7624 Pécs, Ifjúság u. 13, Hungary; Szentágothai Research Center, 7624 Pécs, Ifjúság u. 20, Hungary
| | - Péter Kustán
- Department of Laboratory Medicine, University of Pécs, 7624 Pécs, Ifjúság u. 13, Hungary; Department of Anaesthesiology and Intensive Therapy, University of Pécs, 7624 Pécs, Ifjúság u. 13, Hungary
| | - Diána Mühl
- Department of Anaesthesiology and Intensive Therapy, University of Pécs, 7624 Pécs, Ifjúság u. 13, Hungary
| | - Andrea Ludány
- Department of Laboratory Medicine, University of Pécs, 7624 Pécs, Ifjúság u. 13, Hungary; Szentágothai Research Center, 7624 Pécs, Ifjúság u. 20, Hungary
| | - Beáta Bugyi
- Department of Biophysics, University of Pécs, 7624 Pécs, Szigeti út 12, Hungary; Szentágothai Research Center, 7624 Pécs, Ifjúság u. 20, Hungary
| | - Tamás Kőszegi
- Department of Laboratory Medicine, University of Pécs, 7624 Pécs, Ifjúság u. 13, Hungary; Szentágothai Research Center, 7624 Pécs, Ifjúság u. 20, Hungary.
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27
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Koskelainen S, Pihlamaa T, Suominen S, Zhao F, Salo T, Risteli J, Baumann M, Kalimo H, Kiuru-Enari S. Gelsolin amyloid angiopathy causes severe disruption of the arterial wall. APMIS 2016; 124:639-48. [PMID: 27198069 DOI: 10.1111/apm.12554] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 04/18/2016] [Indexed: 11/26/2022]
Abstract
Hereditary gelsolin amyloidosis (HGA) is a dominantly inherited systemic disease reported worldwide. HGA is characterized by ophthalmological, neurological, and dermatological manifestations. AGel amyloid accumulates at basal lamina of epithelial and muscle cells, thus amyloid angiopathy is encountered in nearly every organ. HGA patients have cardiovascular, hemorrhagic, and potentially vascularly induced neurological problems. To clarify pathomechanisms of AGel angiopathy, we performed histological, immunohistochemical, and electron microscopic analyses on facial temporal artery branches from 8 HGA patients and 13 control subjects. We demonstrate major pathological changes in arteries: disruption of the tunica media, disorganization of vascular smooth muscle cells, and accumulation of AGel fibrils in arterial walls, where they associate with the lamina elastica interna, which becomes fragmented and diminished. We also provide evidence of abnormal accumulation and localization of collagen types I and III and an increase of collagen type I degradation product in the tunica media. Vascular smooth muscle cells appear to be morphologically and semi-quantitatively normal, only their basal lamina is often thickened. In conclusion, angiopathy in HGA results in severe disruption of arterial walls, characterized by prominent AGel deposition, collagen derangement and severe elastolysis, and it may be responsible for several, particularly hemorrhagic, disease manifestations in HGA.
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Affiliation(s)
- Susanna Koskelainen
- Meilahti Clinical Proteomics Core Facility, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tiia Pihlamaa
- Department of Plastic Surgery, Helsinki University Hospital, Helsinki, Finland
| | - Sinikka Suominen
- Department of Plastic Surgery, Helsinki University Hospital, Helsinki, Finland
| | - Fang Zhao
- Advanced Microscopy Unit, Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tuula Salo
- Research Group of Cancer and Translational Medicine, Medical Faculty, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Juha Risteli
- Research Group of Cancer and Translational Medicine, Medical Faculty, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Marc Baumann
- Meilahti Clinical Proteomics Core Facility, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Hannu Kalimo
- Department of Pathology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Department of Forensic Medicine, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Sari Kiuru-Enari
- Clinical Neurosciences, Neurology, University of Helsinki, Helsinki, Finland
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28
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Li M, Cui F, Cheng Y, Han L, Wang J, Sun D, Liu YL, Zhou PK, Min R. Gelsolin: role of a functional protein in mitigating radiation injury. Cell Biochem Biophys 2016; 71:389-96. [PMID: 25164111 DOI: 10.1007/s12013-014-0210-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The present study was conducted to explore the protective effect of exogenous gelsolin (GSN) in mice exposed to high-dose of radiation. Changes in the levels of GSNs in peripheral blood of mice and cytoplasm of cultured human intestinal epithelial cells (HIECs) were analyzed after their exposure to different doses of (137)Cs γ-rays at a fixed dose rate. The coagulation associated indices, such as prothrombin time (PT) and activated partial thromboplastin time (APTT) were measured. Effect on radiation-mediated oxidative damage was evaluated by estimating the altered glutathione (GSH) and malondialdehyde (MDA) concentrations in the blood. The results showed that radiation induced a pronounced decrease in the pGSN blood levels. However, the cGSN levels of irradiated HIECs were increased in a dose-dependent manner. Administration of recombinant human pGSN to irradiated mice resulted in an ameliorated clotting time as indicated by the PT and the APTT indices. The treatment of mice with hpGSN enhanced the blood levels of GSH while MDA concentrations were decreased indicating an improved antioxidant status. These results suggest that GSNs might play a regulatory role in the suppression of the tissue damage induced by acute radiation exposure.
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Affiliation(s)
- Mingjuan Li
- Division of Radiation Medicine Department of Naval Medicine, Second Military Medical University, Shanghai, China
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29
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Grubbs JK, Dekkers JCM, Huff-Lonergan E, Tuggle CK, Lonergan SM. Identification of potential serum biomarkers to predict feed efficiency in young pigs1. J Anim Sci 2016; 94:1482-92. [DOI: 10.2527/jas.2015-9692] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- J. K. Grubbs
- Department of Animal Science, Iowa State University, Ames 50011
| | | | | | - C. K. Tuggle
- Department of Animal Science, Iowa State University, Ames 50011
| | - S. M. Lonergan
- Department of Animal Science, Iowa State University, Ames 50011
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30
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Rai M, Demontis F. Systemic Nutrient and Stress Signaling via Myokines and Myometabolites. Annu Rev Physiol 2016; 78:85-107. [DOI: 10.1146/annurev-physiol-021115-105305] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mamta Rai
- Division of Developmental Biology, Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105;
| | - Fabio Demontis
- Division of Developmental Biology, Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105;
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31
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Gelsolin decreases actin toxicity and inflammation in murine multiple sclerosis. J Neuroimmunol 2015; 287:36-42. [PMID: 26439960 DOI: 10.1016/j.jneuroim.2015.08.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 07/26/2015] [Accepted: 08/04/2015] [Indexed: 11/22/2022]
Abstract
Gelsolin is the fourth most abundant protein in the body and its depletion in the blood has been found in multiple sclerosis (MS) patients. How gelsolin affects the MS brain has not been studied. We found that while the secreted form of gelsolin (pGSN) decreased in the blood of experimental autoimmune encephalomyelitis (EAE) mice, pGSN concentration increased in the EAE brain. Recombinant human pGSN (rhp-GSN) decreased extracellular actin and myeloperoxidase activity in the brain, resulting in reduced disease activity and less severe clinical disease, suggesting that gelsolin could be a potential therapeutic target for MS.
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32
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Mazur AJ, Morosan-Puopolo G, Makowiecka A, Malicka-Błaszkiewicz M, Nowak D, Brand-Saberi B. Analysis of gelsolin expression pattern in developing chicken embryo reveals high GSN expression level in tissues of neural crest origin. Brain Struct Funct 2014; 221:515-34. [PMID: 25352156 PMCID: PMC4720725 DOI: 10.1007/s00429-014-0923-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 10/16/2014] [Indexed: 12/20/2022]
Abstract
Gelsolin is one of the most intensively studied actin-binding proteins. However, in the literature comprehensive studies of GSN expression during development have not been performed yet in all model organisms. In zebrafish, gelsolin is a dorsalizing factor that modulates bone morphogenetic proteins signaling pathways, whereas knockout of the gelsolin coding gene, GSN is not lethal in murine model. To study the role of gelsolin in development of higher vertebrates, it is crucial to estimate GSN expression pattern during development. Here, we examined GSN expression in the developing chicken embryo. We applied numerous methods to track GSN expression in developing embryos at mRNA and protein level. We noted a characteristic GSN expression pattern. Although GSN transcripts were present in several cell types starting from early developmental stages, a relatively high GSN expression was observed in eye, brain vesicles, midbrain, neural tube, heart tube, and splanchnic mesoderm. In older embryos, we observed a high GSN expression in the cranial ganglia and dorsal root ganglia. A detailed analysis of 10-day-old chicken embryos revealed high amounts of gelsolin especially within the head region: in the olfactory and optic systems, meninges, nerves, muscles, presumptive pituitary gland, and pericytes, but not oligodendrocytes in the brain. Obtained results suggest that GSN is expressed at high levels in some tissues of ectodermal origin including all neural crest derivatives. Additionally, we describe that silencing of GSN expression in brain vesicles leads to altered morphology of the mesencephalon. This implies gelsolin is crucial for chicken brain development.
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Affiliation(s)
- Antonina Joanna Mazur
- Department of Cell Pathology, Faculty of Biotechnology, University of Wroclaw, ul. Joliot-Curie 14a, 50-383, Wrocław, Poland.
| | | | - Aleksandra Makowiecka
- Department of Cell Pathology, Faculty of Biotechnology, University of Wroclaw, ul. Joliot-Curie 14a, 50-383, Wrocław, Poland
| | - Maria Malicka-Błaszkiewicz
- Department of Cell Pathology, Faculty of Biotechnology, University of Wroclaw, ul. Joliot-Curie 14a, 50-383, Wrocław, Poland
| | - Dorota Nowak
- Department of Cell Pathology, Faculty of Biotechnology, University of Wroclaw, ul. Joliot-Curie 14a, 50-383, Wrocław, Poland
| | - Beate Brand-Saberi
- Department of Anatomy and Molecular Embryology, Ruhr University of Bochum, Bochum, Germany
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Shi S, Chen C, Zhao D, Liu X, Cheng B, Wu S, Lin R, Tan L, Fang X, Shu Q. The role of plasma gelsolin in cardiopulmonary bypass induced acute lung injury in infants and young children: a pilot study. BMC Anesthesiol 2014; 14:67. [PMID: 25126004 PMCID: PMC4132929 DOI: 10.1186/1471-2253-14-67] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 07/30/2014] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Acute lung injury (ALI) induced by cardiopulmonary bypass (CPB, CPB-ALI) is a common and serious complication after cardiac surgery. And infants and young children are more prone to CPB-ALI. The purpose of this study was to investigate the perioperative changes of plasma gelsolin (pGSN) in patients below 3 years of age with cardiac surgeries and CPB, and determine whether pGSN are associated with the occurrence and severity of CPB-ALI. METHODS Seventy-seven consecutive patients ≤3 years of age with congenital heart diseases (CHD) performed on open heart surgery with CPB were finally enrolled, and assigned to ALI and non-ALI groups according to the American-European Consensus Criteria. Plasma concentrations of gelsolin and total protein were measured at following 8 time points: before CPB (a), after CPB (b), 2 hours after CPB (c), 6 hours after CPB (d), 12 hours after CPB (e), 24 hours after CPB (f), 48 hours after CPB (g) and 72 hours after CPB (h). RESULTS Twenty-seven (35.1%) patients developed CPB-ALI in the study, including eleven (14.3%) patients with ARDS. The earliest significant drop of pGSN and normalized pGSN (pGSNN) of ALI group both occurred at 6 hours after CPB (p = 0.04 and p < 0.01), which was much earlier than those of non-ALI group (48 hours, p = 0.03 and 24 hours, p < 0.01); PGSN of ALI group before CPB and 6 hours after CPB were both significantly lower than those of non-ALI group (p < 0.01); PGSNN of ALI group before CPB and 6 hours after CPB were both significantly lower than those of non-ALI group (p < 0.01, p = 0.04); PGSN before CPB was the only independent risk factor predicting the occurrence of CPB-ALI (OR, 1.023; 95% CI, 1.007-1.039; p < 0.01) with an AUC of 0.753 (95% CI, 0.626-0.880); The optimal cutoff value of pGSN before CPB was 264.2 mg/L, with a sensitivity of 58.3% and a specificity 94.7%. And lower pGSN before CPB was significantly associated with the severity of CS-AKI (r = -0.45, p < 0.01). CONCLUSIONS Patients developing CPB-ALI had lower plasma gelsolin reservoir and a much more amount and rapid consumption of plasma gelsolin early after operation. PGSN before CPB was an early and sensitive predictor of CPB-ALI in infants and young children undergoing cardiac surgery, and was negatively correlated with the severity of CPB-ALI.
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Affiliation(s)
- ShanShan Shi
- Surgical Intensive Care Unit, Children’s Hospital, Medical College, Zhejiang University, No. 57, Zhugan Lane, Hangzhou 310003, P R China
| | - Chi Chen
- Department of Thoracic & Cardiovascular Surgery, Children’s Hospital, Medical College, Zhejiang University, and Zhejiang Key Laboratory for Diagnosis and Therapy of Neonatal Diseases, No. 57, Zhugan Lane, Hangzhou 310003, P R China
| | - DongYan Zhao
- Department of Thoracic & Cardiovascular Surgery, Children’s Hospital, Medical College, Zhejiang University, and Zhejiang Key Laboratory for Diagnosis and Therapy of Neonatal Diseases, No. 57, Zhugan Lane, Hangzhou 310003, P R China
| | - XiWang Liu
- Department of Thoracic & Cardiovascular Surgery, Children’s Hospital, Medical College, Zhejiang University, and Zhejiang Key Laboratory for Diagnosis and Therapy of Neonatal Diseases, No. 57, Zhugan Lane, Hangzhou 310003, P R China
| | - BaoLi Cheng
- Department of Anesthesiology, the First Affiliated Hospital, Medical College, Zhejiang University, No. 79, Qingchun Road, Hangzhou 310003, P R China
| | - ShuiJing Wu
- Department of Anesthesiology, the First Affiliated Hospital, Medical College, Zhejiang University, No. 79, Qingchun Road, Hangzhou 310003, P R China
| | - Ru Lin
- Department of Thoracic & Cardiovascular Surgery, Children’s Hospital, Medical College, Zhejiang University, and Zhejiang Key Laboratory for Diagnosis and Therapy of Neonatal Diseases, No. 57, Zhugan Lane, Hangzhou 310003, P R China
| | - LinHua Tan
- Surgical Intensive Care Unit, Children’s Hospital, Medical College, Zhejiang University, No. 57, Zhugan Lane, Hangzhou 310003, P R China
| | - XiangMing Fang
- Department of Anesthesiology, the First Affiliated Hospital, Medical College, Zhejiang University, No. 79, Qingchun Road, Hangzhou 310003, P R China
| | - Qiang Shu
- Department of Thoracic & Cardiovascular Surgery, Children’s Hospital, Medical College, Zhejiang University, and Zhejiang Key Laboratory for Diagnosis and Therapy of Neonatal Diseases, No. 57, Zhugan Lane, Hangzhou 310003, P R China
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Chiu TTY, Liao SC, Lee WC, Lee PS, Ng HY, Chien YS, Lee CT. Gelsolin and Adipokines Are Associated With Protein-Energy Wasting in Hemodialysis Patients. Artif Organs 2014; 39:150-5. [DOI: 10.1111/aor.12342] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Terry Ting-Yu Chiu
- Division of Nephrology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Chang-Gung University College of Medicine; Kaohsiung Taiwan
| | - Shang-Chih Liao
- Division of Nephrology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Chang-Gung University College of Medicine; Kaohsiung Taiwan
| | - Wen-Chin Lee
- Division of Nephrology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Chang-Gung University College of Medicine; Kaohsiung Taiwan
| | - Po-Shun Lee
- Translational Medicine; Brigham and Women's Hospital, Harvard Medical School; Boston MA USA
| | - Hwee-Yeong Ng
- Division of Nephrology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Chang-Gung University College of Medicine; Kaohsiung Taiwan
| | - Yu-Su Chien
- Division of Nephrology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Chang-Gung University College of Medicine; Kaohsiung Taiwan
| | - Chien-Te Lee
- Division of Nephrology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Chang-Gung University College of Medicine; Kaohsiung Taiwan
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35
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Zhan Y, Yang YT, You HM, Cao D, Liu CY, Zhou CJ, Wang ZY, Bai SJ, Mu J, Wu B, Zhan QL, Xie P. Plasma-based proteomics reveals lipid metabolic and immunoregulatory dysregulation in post-stroke depression. Eur Psychiatry 2014; 29:307-15. [PMID: 24853294 DOI: 10.1016/j.eurpsy.2014.03.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 03/23/2014] [Accepted: 03/26/2014] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Post-stroke depression (PSD) is the most common psychiatric complication facing stroke survivors and has been associated with increased distress, physical disability, poor rehabilitation, and suicidal ideation. However, the pathophysiological mechanisms underlying PSD remain unknown, and no objective laboratory-based test is available to aid PSD diagnosis or monitor progression. METHODS Here, an isobaric tags for relative and absolute quantitation (iTRAQ)-based quantitative proteomic approach was performed to identify differentially expressed proteins in plasma samples obtained from PSD, stroke, and healthy control subjects. RESULTS The significantly differentiated proteins were primarily involved in lipid metabolism and immunoregulation. Six proteins associated with these processes--apolipoprotein A-IV (ApoA-IV), apolipoprotein C-II (ApoC-II), C-reactive protein (CRP), gelsolin, haptoglobin, and leucine-rich alpha-2-glycoprotein (LRG)--were selected for Western blotting validation. ApoA-IV expression was significantly upregulated in PSD as compared to stroke subjects. ApoC-II, LRG, and CRP expression were significantly downregulated in both PSD and HC subjects relative to stroke subjects. Gelsolin and haptoglobin expression were significantly dysregulated across all three groups with the following expression profiles: gelsolin, healthy control>PSD>stroke subjects; haptoglobin, stroke>PSD>healthy control. CONCLUSIONS Early perturbation of lipid metabolism and immunoregulation may be involved in the pathophysiology of PSD. The combination of increased gelsolin levels accompanied by decreased haptoglobin levels shows promise as a plasma-based diagnostic biomarker panel for detecting increased PSD risk in post-stroke patients.
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Affiliation(s)
- Y Zhan
- Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - Y-T Yang
- Department of Neurology, The First Affiliated Hospital at Chongqing Medical University, 1, Yixue Road, Yuzhong District, Chongqing, 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - H-M You
- Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - D Cao
- Department of Neurology, The First Affiliated Hospital at Chongqing Medical University, 1, Yixue Road, Yuzhong District, Chongqing, 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - C-Y Liu
- Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - C-J Zhou
- Department of Neurology, The First Affiliated Hospital at Chongqing Medical University, 1, Yixue Road, Yuzhong District, Chongqing, 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - Z-Y Wang
- Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - S-J Bai
- Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - J Mu
- Department of Neurology, The First Affiliated Hospital at Chongqing Medical University, 1, Yixue Road, Yuzhong District, Chongqing, 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - B Wu
- Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - Q-L Zhan
- Department of Neurology, The Fifth People's Hospital of Chongqing, Chongqing, China
| | - P Xie
- Department of Neurology, The First Affiliated Hospital at Chongqing Medical University, 1, Yixue Road, Yuzhong District, Chongqing, 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing, China; Institute of Neuroscience, Chongqing Medical University, Chongqing, China.
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Adipokines, biomarkers of endothelial activation, and metabolic syndrome in patients with ankylosing spondylitis. BIOMED RESEARCH INTERNATIONAL 2014; 2014:860651. [PMID: 24757680 PMCID: PMC3976882 DOI: 10.1155/2014/860651] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 02/13/2014] [Indexed: 12/11/2022]
Abstract
Ankylosing spondylitis (AS) is a chronic inflammatory rheumatic disease associated with accelerated atherosclerosis and increased risk of cardiovascular (CV) disease. AS patients also display a high prevalence of features clustered under the name of metabolic syndrome (MeS). Anti-TNF-α therapy was found to be effective to treat AS patients by suppressing inflammation and also improving endothelial function. Previously, it was demonstrated that a short infusion of anti-TNF-α monoclonal antibodyinfliximab induced a rapid and dramatic reduction in serum insulin levels and insulin resistance along with a rapid improvement of insulin sensitivity in nondiabetic AS patients. The role of adipokines, MeS-related biomarkers and biomarkers of endothelial cell activation and inflammation seem to be relevant in different chronic inflammatory diseases. However, its implication in AS has not been fully established. Therefore, in this review we summarize the recent advances in the study of the involvement of these molecules in CV disease or MeS in AS. The assessment of adipokines and biomarkers of endothelial cell activation and MeS may be of potential relevance in the stratification of the CV risk of patients with AS.
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Henriques AG, Oliveira JM, Gomes B, Ruivo R, da Cruz e Silva EF, da Cruz e Silva OAB. Complexing Aβ prevents the cellular anomalies induced by the Peptide alone. J Mol Neurosci 2014; 53:661-8. [PMID: 24599756 PMCID: PMC4112052 DOI: 10.1007/s12031-014-0233-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 01/10/2014] [Indexed: 12/01/2022]
Abstract
Retention of intracellular secreted APP (isAPP) can be provoked by the neurotoxic peptide Aβ. The latter decreases in the cerebrospinal fluid of Alzheimer’s disease (AD) patients, as a consequence of its cerebral accumulation and deposition into senile plaques. Of similar relevance, secreted APP (sAPP) levels can be associated with AD. The studies here presented, reinforce the link between sAPP and Aβ and address putative therapeutic strategies. Laminin and gelsolin are potential candidates; both prevent Aβ fibril formation by complexing with Aβ, thus attenuating its neurotoxicity. We show that preincubation of Aβ with laminin and gelsolin has the effect of rendering it less potent to isAPP accumulation in cortical neurons. This appears to be related to a decrease in F-actin polymerization, whereas Aβ alone induces the polymerization. Further, Aβ decreases gelsolin levels, and the latter is involved in Aβ removal. Our data indicates that Aβ-laminin and Aβ-gelsolin complexes are less neurotoxic and also less potent than fibrillar Aβ at inducing isAPP retention. These results validate the potential of these proteins as therapeutic strategies that prevent the Aβ-induced effects. In hence, given that Aβ decreases the levels of proteins involved in its own clearance, this may contribute to the mechanisms underlying AD pathology.
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Affiliation(s)
- A. G. Henriques
- Laboratório de Neurociências, Centro de Biologia Celular, SACS, Universidade de Aveiro, Aveiro, Portugal
| | - J. M. Oliveira
- Laboratório de Neurociências, Centro de Biologia Celular, SACS, Universidade de Aveiro, Aveiro, Portugal
| | - B. Gomes
- Laboratório de Neurociências, Centro de Biologia Celular, SACS, Universidade de Aveiro, Aveiro, Portugal
| | - R. Ruivo
- Laboratório de Neurociências, Centro de Biologia Celular, SACS, Universidade de Aveiro, Aveiro, Portugal
| | - E. F. da Cruz e Silva
- Laboratório de Neurociências, Centro de Biologia Celular, SACS, Universidade de Aveiro, Aveiro, Portugal
| | - O. A. B. da Cruz e Silva
- Laboratório de Neurociências, Centro de Biologia Celular, SACS, Universidade de Aveiro, Aveiro, Portugal
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Gurniak CB, Chevessier F, Jokwitz M, Jönsson F, Perlas E, Richter H, Matern G, Boyl PP, Chaponnier C, Fürst D, Schröder R, Witke W. Severe protein aggregate myopathy in a knockout mouse model points to an essential role of cofilin2 in sarcomeric actin exchange and muscle maintenance. Eur J Cell Biol 2014; 93:252-66. [PMID: 24598388 DOI: 10.1016/j.ejcb.2014.01.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 01/20/2014] [Accepted: 01/22/2014] [Indexed: 01/19/2023] Open
Abstract
Mutations in the human actin depolymerizing factor cofilin2 result in an autosomal dominant form of nemaline myopathy. Here, we report on the targeted ablation of murine cofilin2, which leads to a severe skeletal muscle specific phenotype within the first two weeks after birth. Apart from skeletal muscle, cofilin2 is also expressed in heart and CNS, however the pathology was restricted to skeletal muscle. The two close family members of cofilin2 - ADF and cofilin1 - were co-expressed in muscle, but unable to compensate for the loss of cofilin2. While primary myofibril assembly and muscle development were unaffected in cofilin2 mutant mice, progressive muscle degeneration was observed between postnatal days 3 and 7. Muscle pathology was characterized by sarcoplasmic protein aggregates, fiber size disproportion, mitochondrial abnormalities and internal nuclei. The observed muscle pathology differed from nemaline myopathy, but showed combined features of actin-associated myopathy and myofibrillar myopathy. In cofilin2 mutant mice, the postnatal expression pattern and turnover of sarcomeric α-actin isoforms were altered. Levels of smooth muscle α-actin were increased and remained high in developing muscles, suggesting that cofilin2 plays a crucial role during the exchange of α-actin isoforms during the early postnatal remodeling of the sarcomere.
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Affiliation(s)
| | | | - Melanie Jokwitz
- University of Bonn, Institute of Genetics, Cell Migration Unit, Germany
| | - Friederike Jönsson
- Institut Pasteur, Département d'Immunologie, Laboratoire Anticorps en Thérapie et Pathologie, Inserm, U.760, 75015 Paris, France
| | | | - Hendrik Richter
- University of Bonn, Institute of Cellular and Molecular Botany, Germany
| | - Gabi Matern
- University of Bonn, Institute of Genetics, Cell Migration Unit, Germany
| | - Pietro Pilo Boyl
- University of Bonn, Institute of Genetics, Cell Migration Unit, Germany
| | | | - Dieter Fürst
- University of Bonn, Institute of Cell Biology, Germany
| | - Rolf Schröder
- University of Erlangen, Institute of Neuropathology, Germany
| | - Walter Witke
- University of Bonn, Institute of Genetics, Cell Migration Unit, Germany.
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Tian O, Josse AR, Borchers C, El-Sohemy A. Association Between Caffeine Intake and the Plasma Proteome in Humans. JOURNAL OF CAFFEINE RESEARCH 2013. [DOI: 10.1089/jcr.2013.0025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ouxi Tian
- Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Andrea R. Josse
- Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Christoph Borchers
- Genome British Columbia Proteomics Centre, University of Victoria, Victoria, British Columbia, Canada
| | - Ahmed El-Sohemy
- Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada
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Investigation of the actin scavenging system in pre-eclampsia. Eur J Obstet Gynecol Reprod Biol 2013; 172:32-5. [PMID: 24239294 PMCID: PMC3894683 DOI: 10.1016/j.ejogrb.2013.10.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 10/07/2013] [Accepted: 10/16/2013] [Indexed: 12/31/2022]
Abstract
Objectives Cell injury releases actin, the most abundant cell protein. Gelsolin and vitamin D binding protein (VDBP) together depolymerise and clear cell-free actin. Impaired actin clearance is associated with several diseases and correlates with clinical outcome. The actin scavenging system was investigated in pre-eclampsia (PE), a procoagulant and proinflammatory state with placental and vascular damage. Study design Plasma gelsolin and actin free VDBP (AFVDBP) were measured in PE (early onset <33 weeks; late onset ≥36 weeks), matched normal pregnant (normP) and non-pregnant (nonPr) women, using commercially available ELISAs. Longitudinal samples from normP and women who subsequently developed PE were also analysed. Results Plasma gelsolin fell during pregnancy (p = 0.0002), with a concomitant rise in actin-free VDBP (p < 0.001). Gelsolin concentrations were only significantly lower in established PE (p < 0.05) when compared to non-pregnant controls. Conclusions We have shown that the components of the actin clearance system, gelsolin and AFVDBP, are altered in normal pregnancy and further changes occur in established PE, suggesting depleted actin clearance in PE. Whether this is a cause or consequence of PE pathophysiology requires further investigation.
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Langereis JD, Koenderman L, Huttenlocher A, Ulfman LH. Gelsolin expression increases β1 -integrin affinity and L1210 cell adhesion. Cytoskeleton (Hoboken) 2013; 70:385-93. [PMID: 23595955 DOI: 10.1002/cm.21112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Revised: 03/19/2013] [Accepted: 04/08/2013] [Indexed: 01/13/2023]
Abstract
Integrins are functionally regulated by "inside-out" signaling, in that stimulus-induced signaling pathways act on the intracellular integrin tail to regulate the activity of the receptor on the outside. Both a change in conformation (affinity) and clustering (avidity/valency) of the receptors occurs, but the mechanisms that regulate inside out signaling are not completely understood. Previously, we identified gelsolin in a proteomics screen to identify proteins involved in inside-out control of integrins using the lymphocytic leukemia cell line L1210. Furthermore, we showed that gelsolin was involved in affinity regulation of β1 -integrins in the leukemic cell line U937. Here, we examined how gelsolin regulates β1 -integrin affinity in the leukemia cell line L1210. We show that gelsolin is mainly expressed at the cell membrane and is present near β1 -integrins. The role for actin polymerization in integrin affinity regulation was examined using the actin modulating agent jasplakinolide, which decreased β1 -integrin affinity. Similarly, knock-down of gelsolin in L1210 cells also decreased β1 -integrin affinity and cell adhesion to collagen. These data suggest that increased actin polymerization through gelsolin regulates β1 -integrin affinity and cell adhesion.
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Affiliation(s)
- Jeroen D Langereis
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
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Serum creatinine as a marker of muscle mass in chronic kidney disease: results of a cross-sectional study and review of literature. J Cachexia Sarcopenia Muscle 2013; 4:19-29. [PMID: 22777757 PMCID: PMC3581614 DOI: 10.1007/s13539-012-0079-1] [Citation(s) in RCA: 252] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 06/12/2012] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Higher muscle mass is associated with better outcomes and longevity in patients with chronic disease states. Imaging studies such as dual-energy X-ray absorptiometry (DEXA) are among the gold standard methods for assessing body fat and lean body mass (LBM), approximately half of which is comprised of skeletal muscle mass. Elaborate imaging devices, however, are not commonly available in routine clinical practice and therefore easily accessible and cost-effective, but reliable muscle mass biomarkers are needed. One such marker is serum creatinine, derived from muscle-based creatine, which is inexpensive and ubiquitously available, and it can serve as a biomarker of skeletal muscle mass in human subjects. METHODS AND RESULTS In 118 hemodialysis patients, we found that the 3-month averaged serum creatinine concentration correlated well with DEXA-measured LBM. The recent literature regarding serum creatinine as a surrogate of muscle mass is summarized, as is the literature concerning the use of other measures of muscle mass, such as plasma gelsolin and actin, and urinary creatinine excretion. We have also reviewed the role of dietary meat intake in serum creatinine variability along with several biomarkers of dietary meat intake (creatine, carnitine, carnosine, ophidine, anserine, 3-methyl-L-histidine and 1-methylhistidine). CONCLUSION In summary, none of these biomarkers was studied in CKD patients. We advance the hypothesis that in both health and disease, under steady state, serum creatinine can serve as a reliable muscle mass biomarker if appropriate adjustment for full or residual kidney function and dietary meat intake is undertaken.
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Zhao DQ, Wang K, Zhang HD, Li YJ. Significant reduction of plasma gelsolin levels in patients with intracerebral hemorrhage. Clin Chim Acta 2013; 415:202-6. [DOI: 10.1016/j.cca.2012.10.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 10/24/2012] [Accepted: 10/31/2012] [Indexed: 11/30/2022]
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Abstract
Hereditary gelsolin amyloidosis (HGA) is an autosomally dominantly inherited form of systemic amyloidosis, characterized mainly by cranial and sensory peripheral neuropathy, corneal lattice dystrophy, and cutis laxa. HGA, originally reported from Finland and now increasingly from other countries in Europe, North and South America, and Asia, may still be underdiagnosed worldwide. It is the first and so-far only known disorder caused by a gelsolin gene defect, namely a G654A or G654T mutation. Gelsolin is a principal actin-modulating protein, implicated in multiple biological processes, also in the nervous system, e.g. axonal transport, myelination, neurite outgrowth, and neuroprotection. The gelsolin gene defect causes expression of variant gelsolin, followed by systemic deposition of gelsolin amyloid (AGel) in HGA patients and even other consequences on the metabolism and function of gelsolin. In HGA, specific therapy is not yet available but correct diagnosis enables adequate symptomatic treatment which decisively improves the quality of life in these patients. A transgenic murine model of HGA expressing AGel is available, in anticipation of new treatment options targeted toward this slowly progressive but devastating amyloidosis. Present and future lessons learned from HGA may be applicable even in diagnosis and treatment of other hereditary and sporadic amyloidoses.
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Affiliation(s)
- Sari Kiuru-Enari
- Department of Neurology, Unit for Neuromuscular Diseases, Helsinki University Central Hospital, Helsinki, Finland.
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Xu JF, Liu WG, Dong XQ, Yang SB, Fan J. Change in plasma gelsolin level after traumatic brain injury. J Trauma Acute Care Surg 2012; 72:491-6. [PMID: 22439219 DOI: 10.1097/ta.0b013e318226ec39] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Plasma gelsolin depletion has been associated with poor outcome of critically ill patients. However, there is a paucity of data available on circulating plasma gelsolin concentration in traumatic brain injury (TBI). Thus, we sought to investigate change in plasma gelsolin level after TBI and to evaluate its relation with disease outcome. METHODS Fifty healthy controls and 94 patients with acute severe TBI were included. Plasma samples were obtained on admission and at days 1, 2, 3, 5, and 7. Its concentration was measured by enzyme-linked immunosorbent assay. RESULTS Twenty-six patients (27.7%) died from TBI in a month. After TBI, plasma gelsolin level in patients decreased during the 6-hour period immediately, was at the nadir in 24 hours, increased gradually thereafter, and was substantially lower than that in healthy controls during the 7-day period. A multivariate analysis showed plasma gelsolin level was an independent predictor for 1-month mortality (odds ratio, 0.941; 95% confidence interval, 0.895– 0.989; p = 0.017) and positively associated with Glasgow Coma Scale (GCS) score (t = 6.538, p 0.001). A receiver operating characteristic curve identified that a baseline plasma gelsolin level 52.7 mg/L predicted 1-month mortality with 88.5% sensitivity and 79.4% specificity (area under the curve, 0.869; 95%confidence interval, 0.783– 0.930). The predictive value of the gelsolin concentration was thus similar to that of GCS scores (p =0.185). However, gelsolin did not statistically significantly improve the area under the curve of GCS scores (p = 0.517). CONCLUSIONS Decreased plasma gelsolin level is associated with GCS scores and an independent prognostic marker of mortality after TBI. Reversing plasma gelsolin deficiency may be an effective treatment for TBI.
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Affiliation(s)
- Jin-Fang Xu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou, China
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Jin Y, Li BY, Qiu LL, Ling YR, Bai ZQ. Decreased plasma gelsolin is associated with 1-year outcome in patients with traumatic brain injury. J Crit Care 2012; 27:527.e1-6. [PMID: 22386223 DOI: 10.1016/j.jcrc.2012.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2011] [Revised: 12/12/2011] [Accepted: 01/04/2012] [Indexed: 12/27/2022]
Abstract
PURPOSE Decreased plasma gelsolin level has been associated with 1-month mortality after traumatic brain injury (TBI). Thus, we investigated the ability of gelsolin to predict 1-year mortality and functional outcome in these patients. METHODS One hundred fourteen healthy controls and 114 patients with acute severe TBI were included in this study. Plasma gelsolin concentration on admission was measured by ELISA. RESULTS Fifty-five patients (48.2%) had unfavorable outcome (Glasgow Outcome Scale score of 1-3) and 38 patients (33.3%) died in 1 year after TBI. Upon admission, plasma gelsolin level in patients was substantially lower than that in healthy controls. A multivariate analysis selected plasma gelsolin level as an independent predictor for 1-year unfavorable outcome and mortality of patients. A receiver operating characteristic curve analysis showed plasma gelsolin level predicted 1-year unfavorable outcome and mortality statistically significantly. The predictive value of the gelsolin concentration was thus similar to that of Glasgow Coma Scale (GCS) score. In a combined logistic-regression model, gelsolin did not statistically significantly improve the area under curve of GCS score. CONCLUSIONS Plasma gelsolin level is a useful, complementary tool to predict functional outcome and mortality 1 year after TBI.
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Affiliation(s)
- Yong Jin
- Department of Neurosurgery, Affiliated Taizhou Municipal Hospital, Taizhou University, Jiaojiang District, Taizhou 318000, China.
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Scholl PF, Cole RN, Ruczinski I, Gucek M, Diez R, Rennie A, Nathasingh C, Schulze K, Christian P, Yager JD, Groopman JD, West KP. Maternal serum proteome changes between the first and third trimester of pregnancy in rural southern Nepal. Placenta 2012; 33:424-32. [PMID: 22385826 DOI: 10.1016/j.placenta.2012.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 01/19/2012] [Accepted: 02/08/2012] [Indexed: 10/28/2022]
Abstract
Characterization of normal changes in the serum proteome during pregnancy may enhance understanding of maternal physiology and lead to the development of new gestational biomarkers. In 23 Nepalese pregnant women who delivered at term, two-dimensional difference in-gel electrophoresis (DIGE) was used to assess changes in relative protein abundance between paired serum samples collected in the first and third trimesters. One-hundred and forty-five of over 700 protein spots in DIGE gels (pI 4.2-6.8) exhibited nominally significant (p < 0.05) differences in abundance across trimesters. Additional filtering using a Bonferroni correction reduced the number of significant (p < 0.00019) spots to 61. Mass spectrometric analysis detected 38 proteins associated with gestational age, cytoskeletal remodeling, blood pressure regulation, lipid and nutrient transport, and inflammation. One new protein, pregnancy-specific β-glycoprotein 4 was detected. A follow-up isotope tagging for relative and absolute quantitation (iTRAQ) experiment of six mothers from the DIGE study revealed 111 proteins, of which 11 exhibited significant (p < 0.05) differences between trimesters. Four of these proteins: gelsolin, complement C1r subcomponent, α-1-acid glycoprotein, and α-1B-glycoprotein also changed in the DIGE analysis. Although not previously associated with normal pregnancy, gelsolin decreased in abundance by the third trimester (p < 0.01) in DIGE, iTRAQ and Western analyses. Changes in abundance of proteins in serum that are associated with syncytiotrophoblasts (gelsolin, pregnancy-specific β-1 glycoprotein 1 and β-2-glycoprotein I) probably reflect dynamics of a placental proteome shed into maternal circulation during pregnancy. Measurement of changes in the maternal serum proteome, when linked with birth outcomes, may yield biomarkers for tracking reproductive health in resource poor settings in future studies.
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Affiliation(s)
- P F Scholl
- Johns Hopkins University, Bloomberg School of Public Health, Department of Environmental Health Sciences, 615 N. Wolfe St., Baltimore, MD 21205-2200, USA.
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Solomon JP, Page LJ, Balch WE, Kelly JW. Gelsolin amyloidosis: genetics, biochemistry, pathology and possible strategies for therapeutic intervention. Crit Rev Biochem Mol Biol 2012; 47:282-96. [PMID: 22360545 DOI: 10.3109/10409238.2012.661401] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Protein misassembly into aggregate structures, including cross-β-sheet amyloid fibrils, is linked to diseases characterized by the degeneration of post-mitotic tissue. While amyloid fibril deposition in the extracellular space certainly disrupts cellular and tissue architecture late in the course of amyloid diseases, strong genetic, pathological and pharmacologic evidence suggests that the process of amyloid fibril formation itself, known as amyloidogenesis, likely causes these maladies. It seems that the formation of oligomeric aggregates during the amyloidogenesis process causes the proteotoxicity and cytotoxicity characteristic of these disorders. Herein, we review what is known about the genetics, biochemistry and pathology of familial amyloidosis of Finnish type (FAF) or gelsolin amyloidosis. Briefly, autosomal dominant D187N or D187Y mutations compromise Ca(2+) binding in domain 2 of gelsolin, allowing domain 2 to sample unfolded conformations. When domain 2 is unfolded, gelsolin is subject to aberrant furin endoproteolysis as it passes through the Golgi on its way to the extracellular space. The resulting C-terminal 68 kDa fragment (C68) is susceptible to extracellular endoproteolytic events, possibly mediated by a matrix metalloprotease, affording 8 and 5 kDa amyloidogenic fragments of gelsolin. These amyloidogenic fragments deposit systemically, causing a variety of symptoms including corneal lattice dystrophy and neurodegeneration. The first murine model of the disease recapitulates the aberrant processing of mutant plasma gelsolin, amyloid deposition, and the degenerative phenotype. We use what we have learned from our biochemical studies, as well as insight from mouse and human pathology to propose therapeutic strategies that may halt the progression of FAF.
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Affiliation(s)
- James P Solomon
- Departments of Chemistry and Molecular and Experimental Medicine, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA
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Peddada N, Sagar A, Ashish, Garg R. Plasma gelsolin: a general prognostic marker of health. Med Hypotheses 2011; 78:203-10. [PMID: 22082609 DOI: 10.1016/j.mehy.2011.10.024] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 10/19/2011] [Accepted: 10/21/2011] [Indexed: 11/25/2022]
Abstract
Plasma gelsolin (pGSN) is the only component of two member extracellular actin scavenger system capable of severing circulating actin microfilaments. Here, we put forth the hypothesis that pGSN level is an important and sensitive general prognostic biomarker for health and disease conditions in humans, urging the need for gelsolin replacement therapy to improve patient's health status. Clinical significance and the therapeutic importance of this protein have been well illustrated in animal models as well as in patients with various diseases. Patients with decreased pGSN levels were observed to have higher mortality rate, longer hospital stay and longer ventilation time in intensive care units as compared to healthy controls. pGSN levels were found to be increasing in patients recovering from diseases; furthermore, it has been confirmed that repletion with exogenous recombinant pGSN increases the survival rate in animal models of different acute insults. To be used as a biomarker of health, however, establishing the accurate levels of gelsolin in human plasma and understanding its variance with age, race, gender and health status is a prerequisite. Upon establishing the accurate levels of pGSN in healthy individuals, this biomarker would predict the prognosis/disease progression in multiple health conditions and help in prioritizing the ones in-need of gelsolin replacement therapy.
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Affiliation(s)
- Nagesh Peddada
- Institute of Microbial Technology (CSIR), Chandigarh, India
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Le HT, Hirko AC, Thinschmidt JS, Grant M, Li Z, Peris J, King MA, Hughes JA, Song S. The protective effects of plasma gelsolin on stroke outcome in rats. EXPERIMENTAL & TRANSLATIONAL STROKE MEDICINE 2011; 3:13. [PMID: 22047744 PMCID: PMC3224589 DOI: 10.1186/2040-7378-3-13] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 11/02/2011] [Indexed: 11/28/2022]
Abstract
Background To date, recombinant tissue plasminogen activator (rtPA) is the only approved drug for ischemic stroke. It is intravenously administered functioning as a thrombolytic agent and is used to obtain reperfusion of the affected area of the brain. Excitotoxicity, inflammation and apoptosis are all involved in delayed neuronal death following stroke and offer multiple opportunities to intervene with neuroprotective agents. Gelsolin (GSN) is an actin- and calcium-binding protein mediating the disassembly of actin filaments and activity of calcium channels. It also functions as a regulator of apoptosis and inflammatory responses. This study tests the hypothesis that increasing the concentration of the form of GSN known as plasma GSN (pGSN) near an infarct will provide neuroprotection following ischemic stroke. Methods We induced middle cerebral artery occlusion (MCAO) in male rats via intracranial injection of endothelin-1 (ET-1), a potent vasoconstrictor, and then treated with local delivery of pGSN. Whole brain laser Doppler perfusion imaging was performed through the skull to assess MCAO effectiveness. Cylinder and vibrissae tests evaluated sensorimotor function before and 72 h after MCAO. Infarct volumes were examined 72 h after MCAO via 2, 3, 5-triphenyltetrazolium chloride (TTC) assay. Results Estimates of relative cerebral perfusion were significantly decreased in all groups receiving MCAO with no differences detected between treatments. Despite equivalent initial strokes, the infarct volume of the pGSN treatment group was significantly reduced compared with the untreated MCAO rats at 72 h. ET-1 induced significant deficits in both cylinder and vibrissae tests while pGSN significantly limited these deficits. Conclusion Gelsolin could be a promising drug for protection against neurodegeneration following ischemic stroke.
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Affiliation(s)
- Huong T Le
- Department of Pharmaceutics, University of Florida College of Pharmacy, Gainesville, FL 32610, USA.
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