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Barrie KR, Rebowski G, Dominguez R. Mechanism of Actin Filament Severing and Capping by Gelsolin. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.09.10.612341. [PMID: 39345426 PMCID: PMC11430012 DOI: 10.1101/2024.09.10.612341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Gelsolin is the prototypical member of a family of Ca 2+ -dependent F-actin severing and capping proteins. A structure of Ca 2+ -bound full-length gelsolin at the barbed end shows domains G1G6 and the inter-domain linkers wrapping around F-actin. Another structure shows domains G1G3, a fragment produced during apoptosis, on both sides of F-actin. Conformational changes that trigger severing occur on one side of F-actin with G1G6 and on both sides with G1G3. Gelsolin remains bound after severing, blocking subunit exchange.
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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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Spadera L, Lugarà M, Spadera M, Conticelli M, Oliva G, Bassi V, Apuzzi V, Calderaro F, Fattoruso O, Guzzi P, D'Amora M, Catapano O, Marra R, Galdo M, Zappalà M, Inui T, Mette M, Vitiello G, Corvino M, Tortoriello G. Adjunctive use of oral MAF is associated with no disease progression or mortality in hospitalized patients with COVID-19 pneumonia: The single-arm COral-MAF1 prospective trial. Biomed Pharmacother 2023; 169:115894. [PMID: 37988850 DOI: 10.1016/j.biopha.2023.115894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 11/09/2023] [Accepted: 11/13/2023] [Indexed: 11/23/2023] Open
Abstract
Based on a growing body of evidence that a dysregulated innate immune response mediated by monocytes/macrophages plays a key role in the pathogenesis of COVID-19, a clinical trial was conducted to investigate the therapeutic potential and safety of oral macrophage activating factor (MAF) plus standard of care (SoC) in the treatment of hospitalized patients with COVID-19 pneumonia. Ninety-seven hospitalized patients with confirmed COVID-19 pneumonia were treated with oral MAF and a vitamin D3 supplement, in combination with SoC, in a single-arm, open label, multicentre, phase II clinical trial. The primary outcome measure was a reduction in an intensive care unit transfer rate below 13% after MAF administration. At the end of the study, an additional propensity score matching (PSM) analysis was performed to compare the MAF group with a control group treated with SoC alone. Out of 97 patients treated with MAF, none needed care in the ICU and/or intubation with mechanical ventilation or died during hospitalization. Oxygen therapy was discontinued after a median of nine days of MAF treatment. The median length of viral shedding and hospital stay was 14 days and 18 days, respectively. After PSM, statistically significant differences were found in all of the in-hospital outcomes between the two groups. No mild to serious adverse events were recorded during the study. Notwithstanding the limitations of a single-arm study, which prevented definitive conclusions, a 21-day course of MAF treatment plus SoC was found to be safe and promising in the treatment of hospitalized adult patients with COVID-19 pneumonia. Further research will be needed to confirm these preliminary findings.
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Affiliation(s)
- Lucrezia Spadera
- Department of Otolaryngology-Head and Neck Surgery, Ospedale del Mare hospital, ASL Napoli 1 Centro, Naples, Italy.
| | - Marina Lugarà
- Department of General Medicine, Ospedale del Mare hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Maria Spadera
- Department of Anesthesiology and Intensive Care, San Giovanni Bosco hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Mariano Conticelli
- Department of Clinical Pathology, Ospedale del Mare Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Gabriella Oliva
- Department of General Medicine, Ospedale del Mare hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Vincenzo Bassi
- Department of General Medicine, San Giovanni Bosco Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Valentina Apuzzi
- Department of General Medicine, San Giovanni Bosco Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Francesco Calderaro
- Department of General Medicine, San Giovanni Bosco Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Olimpia Fattoruso
- Department of Clinical Pathology, San Giovanni Bosco Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Pietro Guzzi
- Department of Medical and Surgical Sciences, University Magna Graecia of Catanzaro, Campus Universitario, Germaneto, 88100 Catanzaro, Italy
| | - Maurizio D'Amora
- Department of Laboratory Medicine and Clinical Pathology, San Paolo Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Oriana Catapano
- Department of Laboratory Medicine and Clinical Pathology, San Paolo Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Roberta Marra
- Department of Pharmacy, Ospedale del Mare Hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Maria Galdo
- Department of Pharmacy, AORN Ospedali dei Colli Monaldi - Cotugno - C.T.O. Hospital, Naples, Italy
| | - Michele Zappalà
- Department of Medicine, Vesuvio Clinic, ASL Napoli 1 Centro, Naples, Italy
| | - Toshio Inui
- Department of Life System, Institute of Technology and Science, Graduate School, Tokushima University, Tokushima, Japan; Saisei Mirai Cell Processing Center, Osaka, Japan; Saisei Mirai Keihan Clinic, Osaka, Japan; Saisei Mirai Kobe Clinic, Kobe, Japan
| | - Martin Mette
- Saisei Mirai Keihan Clinic, Osaka, Japan; Saisei Mirai Kobe Clinic, Kobe, Japan
| | - Giuseppe Vitiello
- Department of Health Management, Ospedale del Mare hospital, ASL Napoli 1 Centro, Naples, Italy
| | - Maria Corvino
- Department of Health Management, ASL Napoli 1 Centro, Naples, Italy
| | - Giuseppe Tortoriello
- Department of Otolaryngology-Head and Neck Surgery, AORN Ospedali dei Colli Monaldi - Cotugno - C.T.O. Hospital, Naples, Italy
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Kőszegi T, Horváth-Szalai Z, Ragán D, Kósa B, Szirmay B, Kurdi C, Kovács GL, Mühl D. Measurement of Urinary Gc-Globulin by a Fluorescence ELISA Technique: Method Validation and Clinical Evaluation in Septic Patients-A Pilot Study. Molecules 2023; 28:6864. [PMID: 37836706 PMCID: PMC10574505 DOI: 10.3390/molecules28196864] [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: 08/31/2023] [Revised: 09/22/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
A major complication of sepsis is the development of acute kidney injury (AKI). In case of acute tubular damage, Gc-globulin, a known serum sepsis marker is increasingly filtrated into the urine therefore, urinary Gc-globulin (u-Gc) levels may predict septic AKI. We developed and validated a competitive fluorescence ELISA method for u-Gc measurement. Serum and urine samples from septic patients were collected in three consecutive days (T1, T2, T3) and data were compared to controls. Intra- and interassay imprecisions were CV < 14% and CV < 20%, respectively, with a recovery close to 100%. Controls and septic patients differed (p < 0.001) in their u-Gc/u-creatinine levels at admission (T1, median: 0.51 vs. 79.1 µg/mmol), T2 (median: 0.51 vs. 57.8 µg/mmol) and T3 (median: 0.51 vs. 55.6 µg/mmol). Septic patients with AKI expressed higher u-Gc/u-creatinine values than those without AKI at T1 (median: 23.6 vs. 136.5 µg/mmol, p < 0.01) and T3 (median: 34.4 vs. 75.8 µg/mmol, p < 0.05). AKI-2 stage patients exhibited more increased u-Gc/u-creatinine levels at T1 (median: 207.1 vs. 53.3 µg/mmol, p < 0.05) than AKI-1 stage individuals. Moderate correlations (p < 0.001) were observed between u-Gc/u-creatinine and se-urea, se-creatinine, se-hsCRP, WBC, u-total protein, u-albumin, u-orosomucoid/u-creatinine, and u-Cystatin C/u-creatinine levels. U-Gc testing may have a predictive value for AKI in septic patients.
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Affiliation(s)
- Tamás Kőszegi
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary
- Hungarian National Laboratory on Reproduction, University of Pécs, 7624 Pécs, Hungary
| | - Zoltán Horváth-Szalai
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary
| | - Dániel Ragán
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Brigitta Kósa
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary
| | - Balázs Szirmay
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Csilla Kurdi
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary
- Hungarian National Laboratory on Reproduction, University of Pécs, 7624 Pécs, Hungary
| | - Gábor L. Kovács
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary
- Hungarian National Laboratory on Reproduction, University of Pécs, 7624 Pécs, Hungary
| | - Diána Mühl
- Department of Anesthesiology and Intensive Therapy, Medical School, University of Pécs, 7624 Pécs, Hungary
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Borkowski J, Stefaniak T, Cych P. Changes in Skeletal Muscle Troponin T and Vitamin D Binding Protein (DBP) Concentrations in the Blood of Male Amateur Athletes Participating in a Marathon and 100 km Adventure Race. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:ijerph20095692. [PMID: 37174210 PMCID: PMC10178111 DOI: 10.3390/ijerph20095692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/07/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023]
Abstract
This study assessed changes in creatine kinase (CK) activity and skeletal muscle troponin T (sTnT) concentrations in the blood, to estimate the degree of muscle degradation after exercise. In addition, the concentration of vitamin D binding protein (DBP) in the blood was assessed. DBP concentrations were measured in blood as a marker for plasma load by monomeric actin. The study included marathon (MR) participants and 100 km adventure race (AR) participants, who were examined before and after the race. There was a significant (16-fold) increase in CK activity among AR participants, and a significant increase in sTnT concentration-127% in the MR group and 113% in the AR group, while there was a statistically significant decrease in DBP concentration by 14% in the AR group. In addition, it was observed that the initial concentration of DBP in both groups was in a normal range, but was lower than the average population, and the DBP concentration in the AR group was lower than in the MR group. It was concluded that exhausting physical effort such as a marathon or adventure races causes muscle damage with a far stronger influence on sarcoplasm than on filaments. The short-term and slight reduction in the concentration of DBP in blood after such efforts may be due to the appearance of monomeric actin in plasma.
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Affiliation(s)
- Jacek Borkowski
- Department of Physiology and Biochemistry, Wroclaw University of Health and Sport Sciences, 35 J.I. Paderewski Avenue, 51-612 Wroclaw, Poland
| | - Tadeusz Stefaniak
- Department of Immunology, Pathophysiology and Veterinary Preventive Medicine, Wrocław University of Environmental and Life Sciences, C.K. Norwida 31 Str, 50-375 Wrocław, Poland
| | - Piotr Cych
- Department of Sport Didactics, Wroclaw University of Health and Sport Sciences, 35 J.I. Paderewski Avenue, 51-612 Wroclaw, Poland
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Li J, Dai F, Kou X, Wu B, Xu J, He S. β-Actin: An Emerging Biomarker in Ischemic Stroke. Cell Mol Neurobiol 2023; 43:683-696. [PMID: 35556192 DOI: 10.1007/s10571-022-01225-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 04/10/2022] [Indexed: 11/03/2022]
Abstract
At present, the diagnosis of ischemic stroke mainly depends on neuroimaging technology, but it still has many limitations. Therefore, it is very important to find new biomarkers of ischemic stroke. Recently, β-actin has attracted extensive attention as a biomarker of a variety of cancers. Although several recent studies have been investigating its role in ischemic stroke and other cerebrovascular diseases, the understanding of this emerging biomarker in neurology is still limited. We examined human and preclinical studies to gain a comprehensive understanding of the literature on the subject. Most relevant literatures focus on preclinical research, and pay more attention to the role of β-actin in the process of cerebral ischemia, but some recent literatures reported that in human studies, serum β-actin increased significantly in the early stage of acute cerebral ischemia. This review will investigate the basic biology of β-actin, pay attention to the potential role of serum β-actin as an early diagnostic blood biomarker of ischemic stroke, and explore its potential mechanism in ischemic stroke and new strategies for stroke treatment in the future.
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Affiliation(s)
- Jiaqian Li
- Department of Neurology, School of Medicine, Zhoushan Hospital, Zhejiang University, Zhoushan, 316000, Zhejiang Province, China
| | - Fangyu Dai
- Department of Neurology, School of Medicine, Zhoushan Hospital, Zhejiang University, Zhoushan, 316000, Zhejiang Province, China
| | - Xuelian Kou
- Department of Neurology, School of Medicine, Zhoushan Hospital, Zhejiang University, Zhoushan, 316000, Zhejiang Province, China
| | - Bin Wu
- Department of Neurology, School of Medicine, Zhoushan Hospital, Zhejiang University, Zhoushan, 316000, Zhejiang Province, China
| | - Jie Xu
- Department of Neurology, School of Medicine, Zhoushan Hospital, Zhejiang University, Zhoushan, 316000, Zhejiang Province, China
| | - Songbin He
- Department of Neurology, School of Medicine, Zhoushan Hospital, Zhejiang University, Zhoushan, 316000, Zhejiang Province, China.
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Wu D, Rao Q, Xie Z, Zhu X, Che Y, Wu J, Gao H, Zhang J, Hou Z, Cheng X, Sun Z. Decreased vitamin D-binding protein level portends poor outcome in acute-on-chronic liver failure caused by hepatitis B virus. Clin Mol Hepatol 2022; 28:912-925. [PMID: 35896280 PMCID: PMC9597222 DOI: 10.3350/cmh.2022.0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/23/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND/AIMS Acute-on-chronic liver failure (ACLF) is a catastrophic illness. Few studies investigated the prognostic value of vitamin D-binding protein (VDBP) for hepatitis B virus (HBV)-related ACLF (HBV-ACLF) resulted in conflicting results. METHODS Two prospective HBV-ACLF cohorts (n=287 and n=119) were enrolled to assess and validate the prognostic performance of VDBP. RESULTS VDBP levels in the non-survivors were significantly lower than in the survivors (P<0.001). Multivariate Cox regression demonstrated that VDBP was an independent prognostic factor for HBV-ACLF. The VDBP level at admission gradually decreased as the number of failed organs increased (P<0.001), and it was closely related to coagulation failure. The areas under the receiver operating characteristic curve (AUCs) of the Child-Pugh-VDBP and chronic liver failuresequential organ failure assessment (CLIF-SOFA)-VDBP scores were significantly higher than those of Child-Pugh (P<0.001) and CLIF-SOFA (P=0.0013). The AUCs of model for end-stage liver disease (MELD)-VDBP were significantly higher than those of MELD (P= 0.0384) only in the case of cirrhotic HBV-ACLF patients. Similar results were validated using an external multicenter HBV-ACLF cohort. By longitudinal observation, the VDBP levels gradually increased in survivors (P=0.026) and gradually decreased in non-survivors (P<0.001). Additionally, the VDBP levels were found to be significantly decreased in the deterioration group (P=0.012) and tended to be decreased in the fluctuation group (P=0.055). In contrast, they showed a significant increase in the improvement group (P=0.036). CONCLUSION The VDBP was a promising prognostic biomarker for HBV-ACLF. Sequential measurement of circulating VDBP shows value for the monitoring of ACLF progression.
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Affiliation(s)
- Daxian Wu
- Department of Infectious Diseases, the First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Qunfang Rao
- Department of Infectious Diseases, the First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Zhongyang Xie
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoqing Zhu
- Department of Infectious Diseases, the First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Yuanmei Che
- Department of Infectious Diseases, the First Affiliated Hospital, Nanchang University, Nanchang, China
| | - Jian Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Hainv Gao
- Department of Infectious Diseases, Shulan Hospital of Hangzhou, Hangzhou, China
| | - Jingyu Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Zhouhua Hou
- Department of Infectious Diseases, Xiangya Hospital of Central South University, Changsha, China
| | - Xiaoyu Cheng
- Department of Infectious Diseases, the First Affiliated Hospital, Nanchang University, Nanchang, China,Xiaoyu Cheng Department of Infectious Diseases, the First Affiliated Hospital, Nanchang University, No.17 Yongwai Street, Donghu District, Nanchang 330006, China Tel: +86-13767039717, Fax: +86-791-88692562, E-mail:
| | - Zeyu Sun
- Jinan Microecological Biomedicine Shandong Laboratory, Jinan, China,Corresponding author : Zeyu Sun Jinan Microecological Biomedicine Shandong Laboratory, Huaiyin District, 3716# Qingdao Rd., Jinan 250117, China Tel: +86-13735526619, Fax: +86-0531-81789601, E-mail:
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DiNubile MJ, Parra S, Salomó AC, Levinson SL. Adjunctive Recombinant Human Plasma Gelsolin for Severe Coronavirus Disease 2019 Pneumonia. Open Forum Infect Dis 2022; 9:ofac357. [PMID: 35928505 PMCID: PMC9345409 DOI: 10.1093/ofid/ofac357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 07/21/2022] [Indexed: 12/15/2022] Open
Abstract
Background Excessive inflammation contributes to the morbidity and mortality of severe coronavirus disease 2019 (COVID-19) pneumonia. Recombinant human plasma gelsolin (rhu-pGSN) improves disease outcomes in diverse experimental models of infectious and noninfectious inflammation. Methods In a blinded, randomized study, 61 subjects with documented COVID-19 pneumonia having a World Health Organization (WHO) Severity Score of 4 to 6 and evidence of a hyperinflammatory state were treated with standard care and either adjunctive rhu-pGSN 12 mg/kg or an equal volume of saline placebo given intravenously at entry, 12 hours, and 36 hours. The prespecified coprimary outcomes were survival without major respiratory, hemodynamic, or renal support on Day 14 and the incidence of serious adverse events (SAEs) during the 90-day study period. Results All subjects receiving ≥1 dose of study drug were analyzed. Fifty-four of 61 subjects (88.5%) were WHO severity level 4 at entry. The proportions of subjects alive without support on Day 14 were 25 of 30 rhu-pGSN recipients (83.3%) and 27 of 31 placebo recipients (87.1%). Over the duration of the study, WHO Severity Scores improved similarly in both treatment groups. No statistically significant differences were observed between treatment groups at any time point examined. Two subjects died in each group. Numerically fewer subjects in the rhu-pGSN group had SAEs (5 subjects; 16.7%) or ≥ Grade 3 adverse events (5 subjects; 16.7%) than in the placebo group (8 subjects [25.8%] and 9 subjects [29.0%], respectively), mostly involving the lungs. Three rhu-pGSN recipients (10.0%) were intubated compared to 6 placebo recipients (19.4%). Conclusions Overall, subjects in this study did well irrespective of treatment arm. When added to dexamethasone and remdesivir, no definitive benefit was demonstrated for rhu-pGSN relative to placebo. Safety signals were not identified after the administration of 3 doses of 12 mg/kg rhu-pGSN over 36 hours. The frequencies of SAEs and intubation were numerically fewer in the rhu-pGSN group compared with placebo.
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Affiliation(s)
| | - Sandra Parra
- Hospital Universitari Sant Joan de Reus, Institut d’Investigació Sanitària Pere Virgili (IISPV), Universitat Rovira i Virgili , Reus , Spain
| | - Antoni Castro Salomó
- Hospital Universitari Sant Joan de Reus, Institut d’Investigació Sanitària Pere Virgili (IISPV), Universitat Rovira i Virgili , Reus , Spain
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Ahangar P, Strudwick XL, Cowin AJ. Wound Healing from an Actin Cytoskeletal Perspective. Cold Spring Harb Perspect Biol 2022; 14:a041235. [PMID: 35074864 PMCID: PMC9341468 DOI: 10.1101/cshperspect.a041235] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Wound healing requires a complex cascade of highly controlled and conserved cellular and molecular processes. These involve numerous cell types and extracellular matrix molecules regulated by the actin cytoskeleton. This microscopic network of filaments is present within the cytoplasm of all cells and provides the shape and mechanical support required for cell movement and proliferation. Here, an overview of the processes of wound healing are described from the perspective of the cell in relation to the actin cytoskeleton. Key points of discussion include the role of actin, its binding proteins, signaling pathways, and events that play significant roles in the phases of wound healing. The identification of cytoskeletal targets that can be used to manipulate and improve wound healing is included as an emerging area of focus that may inform future therapeutic approaches to improve healing of complex wounds.
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Affiliation(s)
- Parinaz Ahangar
- Future Industries Institute, UniSA STEM, University of South Australia, South Australia, Adelaide 5000, Australia
| | - Xanthe L Strudwick
- Future Industries Institute, UniSA STEM, University of South Australia, South Australia, Adelaide 5000, Australia
| | - Allison J Cowin
- Future Industries Institute, UniSA STEM, University of South Australia, South Australia, Adelaide 5000, Australia
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Ragán D, Horváth-Szalai Z, Szirmay B, Mühl D. Novel Damage Biomarkers of Sepsis-Related Acute Kidney Injury. EJIFCC 2022; 33:11-22. [PMID: 35645693 PMCID: PMC9092722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Sepsis-related acute kidney injury (AKI) is one of the most common complications of sepsis at the intensive care unit (ICU) with more adverse mortality rates. The early diagnosis and reliable monitoring of sepsis-related AKI are essential in achieving a favorable outcome. Novel serum and urinary biomarkers could yield valuable information during this process. Regarding the widely used Kidney Disease Improving Global Outcomes (KDIGO) classifications, the diagnosis of AKI is still based on the increase of serum creatinine levels and the decrease of urine output; however, these parameters have limitations in reflecting the extent of kidney damage, therefore more sensitive and specific laboratory biomarkers are needed for the early diagnosis and prognosis of sepsis-related AKI. Regarding this, several serum parameters are discussed in this review including presepsin and the most important actin scavenger proteins (gelsolin, Gc-globulin) while other urinary markers are also examined including cell cycle arrest biomarkers, neutrophil gelatinase-associated lipocalin (NGAL), kidney injury molecule 1 (KIM-1), Cystatin C and actin. Novel biomarkers of sepsis-related AKI could facilitate the early diagnosis and monitoring of sepsis-related AKI.
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Affiliation(s)
- Dániel Ragán
- Department of Laboratory Medicine, Medical School, University of Pécs, Hungary, Department of Anesthesiology and Intensive Therapy, Medical School, University of Pécs, Hungary,Corresponding author: Dániel Ragán Department of Laboratory Medicine Medical School, University of Pécs H-7624 Pécs, Ifjúság u. 13 Hungary Phone: +36 30 364 0402 Fax: +36 72 536 121 E-mail:
| | - Zoltán Horváth-Szalai
- Department of Laboratory Medicine, Medical School, University of Pécs, Hungary, János Szentágothai Research Center, University of Pécs, Hungary
| | - Balázs Szirmay
- Department of Laboratory Medicine, Medical School, University of Pécs, Hungary
| | - Diána Mühl
- Department of Anesthesiology and Intensive Therapy, Medical School, University of Pécs, Hungary
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Arruda IR, Souza MP, Soares PA, Albuquerque PB, Silva TD, Medeiros PL, Silva MV, Correia MT, Vicente AA, Carneiro-da-Cunha MG. Xyloglucan and Concanavalin A based dressings in the topical treatment of mice wound healing process. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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12
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Bertholim L, Chaves AFA, Oliveira AK, Menezes MC, Asega AF, Tashima AK, Zelanis A, Serrano SMT. Systemic Effects of Hemorrhagic Snake Venom Metalloproteinases: Untargeted Peptidomics to Explore the Pathodegradome of Plasma Proteins. Toxins (Basel) 2021; 13:toxins13110764. [PMID: 34822548 PMCID: PMC8622078 DOI: 10.3390/toxins13110764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/28/2021] [Accepted: 10/06/2021] [Indexed: 01/15/2023] Open
Abstract
Hemorrhage induced by snake venom metalloproteinases (SVMPs) is a complex phenomenon that involves capillary disruption and blood extravasation. HF3 (hemorrhagic factor 3) is an extremely hemorrhagic SVMP of Bothrops jararaca venom. Studies using proteomic approaches revealed targets of HF3 among intracellular and extracellular proteins. However, the role of the cleavage of plasma proteins in the context of the hemorrhage remains not fully understood. The main goal of this study was to analyze the degradome of HF3 in human plasma. For this purpose, approaches for the depletion of the most abundant proteins, and for the enrichment of low abundant proteins of human plasma, were used to minimize the dynamic range of protein concentration, in order to assess the proteolytic activity of HF3 on a wide spectrum of proteins, and to detect the degradation products using mass spectrometry-based untargeted peptidomics. The results revealed the hydrolysis products generated by HF3 and allowed the identification of cleavage sites. A total of 61 plasma proteins were identified as cleaved by HF3. Some of these proteins corroborate previous studies, and others are new HF3 targets, including proteins of the coagulation cascade, of the complement system, proteins acting on the modulation of inflammation, and plasma proteinase inhibitors. Overall, the data indicate that HF3 escapes inhibition and sculpts the plasma proteome by degrading key proteins and generating peptides that may act synergistically in the hemorrhagic process.
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Affiliation(s)
- Luciana Bertholim
- Laboratório de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signalig, CeTICS, Instituto Butantan, São Paulo 05503-900, SP, Brazil; (L.B.); (A.F.A.C.); (A.K.O.); (M.C.M.); (A.F.A.)
| | - Alison F. A. Chaves
- Laboratório de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signalig, CeTICS, Instituto Butantan, São Paulo 05503-900, SP, Brazil; (L.B.); (A.F.A.C.); (A.K.O.); (M.C.M.); (A.F.A.)
| | - Ana K. Oliveira
- Laboratório de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signalig, CeTICS, Instituto Butantan, São Paulo 05503-900, SP, Brazil; (L.B.); (A.F.A.C.); (A.K.O.); (M.C.M.); (A.F.A.)
| | - Milene C. Menezes
- Laboratório de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signalig, CeTICS, Instituto Butantan, São Paulo 05503-900, SP, Brazil; (L.B.); (A.F.A.C.); (A.K.O.); (M.C.M.); (A.F.A.)
| | - Amanda F. Asega
- Laboratório de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signalig, CeTICS, Instituto Butantan, São Paulo 05503-900, SP, Brazil; (L.B.); (A.F.A.C.); (A.K.O.); (M.C.M.); (A.F.A.)
| | - Alexandre K. Tashima
- Department of Biochemistry, Escola Paulista de Medicina, Federal University of Sao Paulo, Sao Paulo 04023-901, SP, Brazil;
| | - Andre Zelanis
- Functional Proteomics Laboratory, Department of Science and Technology, Federal University of São Paulo (UNIFESP), 330 Talim St., São José dos Campos 12231-280, SP, Brazil;
| | - Solange M. T. Serrano
- Laboratório de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signalig, CeTICS, Instituto Butantan, São Paulo 05503-900, SP, Brazil; (L.B.); (A.F.A.C.); (A.K.O.); (M.C.M.); (A.F.A.)
- Correspondence:
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13
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Urinary actin, as a potential marker of sepsis-related acute kidney injury: A pilot study. PLoS One 2021; 16:e0255266. [PMID: 34310652 PMCID: PMC8312921 DOI: 10.1371/journal.pone.0255266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/13/2021] [Indexed: 12/29/2022] Open
Abstract
Introduction A major complication of sepsis is the development of acute kidney injury (AKI). Recently, it was shown that intracellular actin released from damaged tissues appears in the urine of patients with multiple organ dysfunction syndrome. Our aims were to measure urinary actin (u-actin) concentrations of septic and control patients and to test if u-actin levels could predict AKI and mortality. Methods Blood and urine samples were collected from septic and sepsis-related AKI patients at three time points (T1-3): T1: within 24 hours after admission; T2: second day morning; T3: third day morning of follow-up. Patients with malignancies needing palliative care, end-stage renal disease or kidney transplantation were excluded. Serum and u-actin levels were determined by quantitative Western blot. Patients were categorized by the Sepsis-3 and KDIGO AKI classifications. Results In our study, 17 septic, 43 sepsis-induced AKI and 24 control patients were enrolled. U-actin levels were higher in septic patients compared with controls during follow-up (p<0.001). At T1, the septic and sepsis-related AKI groups also showed differences (p<0.001), yet this increase was not statistically significant at T2 and T3. We also detected significantly elevated u-actin concentrations in AKI-2 and AKI-3 septic patients compared with AKI-1 septic patients (p<0.05) at T1 and T3, along with a significant increase in AKI-2 septic patients compared with AKI-1 septic patients at T2 (p<0.01). This tendency remained the same when referring u-actin to urine creatinine. Parameters of first-day septic patient samples could discriminate AKI from non-AKI state (AUC ROC, p<0.001): u-actin: 0.876; se-creatinine: 0.875. Derived cut-off value for u-actin was 2.63 μg/L (sensitivity: 86.0%, specificity: 82.4%). Conclusion U-actin may be a complementary diagnostic biomarker to se-creatinine in sepsis-related AKI while higher u-actin levels also seem to reflect the severity of AKI. Further investigations may elucidate the importance of u-actin release in sepsis-related AKI.
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14
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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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15
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John AS, Wang Y, Chen J, Osborn W, Wang X, Lim E, Chung D, Stern S, White N, Fu X, López J. Plasma proteomic profile associated with platelet dysfunction after trauma. J Thromb Haemost 2021; 19:1666-1675. [PMID: 33774904 PMCID: PMC8793912 DOI: 10.1111/jth.15316] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 03/11/2021] [Accepted: 03/15/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Coagulopathic bleeding is a major cause of mortality after trauma, and platelet dysfunction contributes to this problem. The causes of platelet dysfunction are relatively unknown, but a great deal can be learned from the plasma environment about the possible pathways involved. OBJECTIVE Describe the changes in plasma proteomic profile associated with platelet dysfunction after trauma. METHODS Citrated blood was collected from severely injured trauma patients at the time of their arrival to the Emergency Department. Samples were collected from 110 patients, and a subset of twenty-four patients was identified by a preserved (n = 12) or severely impaired (n = 12) platelet aggregation response to five different agonists. Untargeted proteomics was performed by nanoflow liquid chromatography tandem mass spectrometry. Protein abundance levels for each patient were normalized to total protein concentration to control for hemodilution by crystalloid fluid infusion prior to blood draw. RESULTS Patients with platelet dysfunction were more severely injured but otherwise demographically similar to those with retained platelet function. Of 232 proteins detected, twelve were significantly different between groups. These proteins fall into several broad categories related to platelet function, including microvascular obstruction with platelet activation, immune activation, and protease activation. CONCLUSIONS This observational study provides a description of the change in proteomic profile associated with platelet dysfunction after trauma and identifies twelve proteins with the most profound changes. The pathways involving these proteins are salient targets for immediate investigation to better understand platelet dysfunction after trauma and identify targets for intervention.
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Affiliation(s)
- Alexander St. John
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Yi Wang
- Bloodworks Research Institute, Seattle, WA, USA
| | - Junmei Chen
- Bloodworks Research Institute, Seattle, WA, USA
| | | | - Xu Wang
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Esther Lim
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | | | - Susan Stern
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Nathan White
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Xiaoyun Fu
- Bloodworks Research Institute, Seattle, WA, USA
| | - José López
- Bloodworks Research Institute, Seattle, WA, USA
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16
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Luebbering N, Abdullah S, Lounder D, Lane A, Dole N, Rubinstein J, Hewison M, Gloude N, Jodele S, Perentesis KMR, Lake K, Litts B, Duell A, Dandoy CE, Davies SM. Endothelial injury, F-actin and vitamin-D binding protein after hematopoietic stem cell transplant and association with clinical outcomes. Haematologica 2021; 106:1321-1329. [PMID: 32241849 PMCID: PMC8094097 DOI: 10.3324/haematol.2019.233478] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Indexed: 01/22/2023] Open
Abstract
Endothelial injury after hematopoietic stem cell transplant is an important initiating factor for early transplant toxicities of thrombotic microangiopathy and acute graft versus host disease. We hypothesized that release of the angiopathic molecule filamentous actin (F-actin) from hematopoietic cells lysed during conditioning prior to stem cell transplant would be associated with clinical outcomes. We detected F-actin in the blood of 52% of stem cell transplant recipients in the first 14 days after transplant, and children with detectable F-actin had a significantly elevated risk of thrombotic microangiopathy (P=0.03) and non-relapse mortality (P=0.04). F-actin is cleared from the circulation by vitamin D binding protein (VDBP) so we expected that higher levels of VDBP would improve outcomes. In a cohort of 190 children receiving an allogeneic transplant, risk of thrombotic microangiopathy was reduced in those with serum concentrations of VDBP above the median at day 30 (10% vs. 31%, P=0.01), and graft versus host disease and non-relapse mortality were reduced in those with levels above the median at day 100 (3% vs. 18%, P=0.04 and 0% vs. 15%, P=0.002). Western blot analyses demonstrated actin-VDBP complexes in the blood, which cleared by day 21-28. Our data support modulation of cytokine secretion and macrophage phenotype by VDBP later after transplant. Taken together, our data identify an association between Factin, a mediator of endothelial damage, and VDBP, an actin scavenger, as modifiers of risk of clinical consequences of endothelial injury.
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Affiliation(s)
- Nathan Luebbering
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Sheyar Abdullah
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Dana Lounder
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Adam Lane
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Nikhil Dole
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jeremy Rubinstein
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Martin Hewison
- School of Clinical and Experimental Medicine, University of, University of Birmingham, UK
| | - Nicholas Gloude
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Sonata Jodele
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kitty M R Perentesis
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kelly Lake
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Bridget Litts
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Alexandra Duell
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Christopher E Dandoy
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Stella M Davies
- Department of Pediatric, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
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17
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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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18
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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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19
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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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20
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Belsky JB, Filbin MR, Rivers EP, Bobbitt KR, Jaehne AK, Wisnik CA, Maciejewski KR, Li F, Morris DC. F-Actin is associated with a worsening qSOFA score and intensive care unit admission in emergency department patients at risk for sepsis. Biomarkers 2020; 25:391-396. [PMID: 32421363 DOI: 10.1080/1354750x.2020.1771419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Objective: We previously demonstrated that plasma levels of F-actin and Thymosin Beta 4 differs among patients with septic shock, non-infectious systemic inflammatory syndrome and healthy controls and may serve as biomarkers for the diagnosis of sepsis. The current study aims to determine if these proteins are associated with or predictive of illness severity in patients at risk for sepsis in the Emergency Department (ED).Methods: Prospective, biomarker study enrolling patients (>18 years) who met the Shock Precautions on Triage Sepsis rule placing them at-risk for sepsis.Results: In this study of 203 ED patients, F-actin plasma levels had a linear trend of increase when the quick Sequential Organ Failure Assessment (qSOFA) score increased. F-actin was also increased in patients who were admitted to the Intensive Care Unit (ICU) from the ED, and in those with positive urine cultures. Thymosin Beta 4 was not associated with or predictive of any significant outcome measures.Conclusion: Increased levels of plasma F-actin measured in the ED were associated with incremental illness severity as measured by the qSOFA score and need for ICU admission. F-actin may have utility in risk stratification of undifferentiated patients in the ED presenting with signs and symptoms of sepsis.
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Affiliation(s)
- Justin B Belsky
- Department of Emergency Medicine, Yale University, New Haven, CT, USA
| | - Michael R Filbin
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Emanuel P Rivers
- Department of Public Health Sciences, Henry Ford Hospital, Detroit, MI, USA
| | - Kevin R Bobbitt
- Department of Public Health Sciences, Henry Ford Hospital, Detroit, MI, USA
| | - Anja K Jaehne
- Department of Public Health Sciences, Henry Ford Hospital, Detroit, MI, USA
| | - Christopher A Wisnik
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Kaitlin R Maciejewski
- School of Public Health, Yale Center for Analytical Sciences, Yale University, New Haven, CT, USA
| | - Fangyong Li
- School of Public Health, Yale Center for Analytical Sciences, Yale University, New Haven, CT, USA
| | - Daniel C Morris
- Department of Public Health Sciences, Henry Ford Hospital, Detroit, MI, USA
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21
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Opdenakker G, Abu El-Asrar A, Van Damme J. Remnant Epitopes Generating Autoimmunity: From Model to Useful Paradigm. Trends Immunol 2020; 41:367-378. [PMID: 32299652 DOI: 10.1016/j.it.2020.03.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 03/09/2020] [Accepted: 03/09/2020] [Indexed: 12/19/2022]
Abstract
Autoimmune diseases are defined as pathologies of adaptive immunity by the presence of autoantibodies or MHC-restricted autoantigen-reactive T cells. Because autoreactivity is a normal process based on mechanisms producing repertoires of antibodies and T cell receptors, crucial questions about disease mechanisms and key steps for interference have been outstanding. We defined 25 years ago the 'remnant epitopes generate autoimmunity' (REGA)-model in which extracellular proteases from innate immune cells generate autoantigens. Here, we refine the REGA-model, tested in diseases ranging from organ-specific autoimmune diseases to systemic lupus erythematosus. It now constitutes a paradigm in which remnant epitopes generate, maintain, and regulate autoimmunity; are dependent on genetic and epigenetic influences; are produced in a disease phase-specific manner; and have therapeutic implications when targeted.
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Affiliation(s)
- Ghislain Opdenakker
- Laboratory of Immunobiology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, University of Leuven, Leuven, Belgium.
| | - Ahmed Abu El-Asrar
- Laboratory of Immunobiology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, University of Leuven, Leuven, Belgium; Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, University of Leuven, Leuven, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, University of Leuven, Leuven, Belgium
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22
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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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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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Vitamin D-binding protein deficiency in mice decreases systemic and select tissue levels of inflammatory cytokines in a murine model of acute muscle injury. J Trauma Acute Care Surg 2019; 84:847-854. [PMID: 29554047 DOI: 10.1097/ta.0000000000001875] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Severe acute muscle injury results in massive cell damage, causing the release of actin into extracellular fluids where it complexes with the vitamin D-binding protein (DBP). We hypothesized that a systemic DBP deficiency would result in a less proinflammatory phenotype. METHODS C57BL/6 wild-type (WT) and DBP-deficient (DBP-/-) mice received intramuscular injections of either 50% glycerol or phosphate-buffered saline into thigh muscles. Muscle injury was assessed by histology. Cytokine levels were measured in plasma, muscle, kidney, and lung. RESULTS All animals survived the procedure, but glycerol injection in both strains of mice showed lysis of skeletal myocytes and inflammatory cell infiltrate. The muscle inflammatory cell infiltrate in DBP-deficient mice had remarkably few neutrophils as compared with WT mice. The neutrophil chemoattractant CXCL1 was significantly reduced in muscle tissue from DBP-/- mice. However, there were no other significant differences in muscle cytokine levels. In contrast, plasma obtained 48 hours after glycerol injection revealed that DBP-deficient mice had significantly lower levels of systemic cytokines interleukin 6, CCL2, CXCL1, and granulocyte colony-stimulating factor. Lung tissue from DBP-/- mice showed significantly decreased amounts of CCL2 and CXCL1 as compared with glycerol-treated WT mice. Several chemokines in kidney homogenates following glycerol-induced injury were significantly reduced in DBP-/- mice: CCL2, CCL5, CXCL1, and CXCL2. CONCLUSIONS Acute muscle injury triggered a systemic proinflammatory response as noted by elevated plasma cytokine levels. However, mice with a systemic DBP deficiency demonstrated a change in their cytokine profile 48 hours after muscle injury to a less proinflammatory phenotype.
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Abstract
Gelsolin (GSN), one of the most abundant actin-binding proteins, is involved in cell motility, shape and metabolism. As a member of the GSN superfamily, GSN is a highly structured protein in eukaryotic cells that can be regulated by calcium concentration, intracellular pH, temperature and phosphatidylinositol-4,5-bisphosphate. GSN plays an important role in cellular mechanisms as well as in different cellular interactions. Because of its participation in immunologic processes and its interaction with different cells of the immune system, GSN is a potential candidate for various therapeutic applications. In this review, we summarise the structure of GSN as well as its regulating and functional roles, focusing on distinct diseases such as Alzheimer's disease, rheumatoid arthritis and cancer. A short overview of GSN as a therapeutic target in today's medicine is also provided.
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Kew RR. The Vitamin D Binding Protein and Inflammatory Injury: A Mediator or Sentinel of Tissue Damage? Front Endocrinol (Lausanne) 2019; 10:470. [PMID: 31354633 PMCID: PMC6635842 DOI: 10.3389/fendo.2019.00470] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 06/28/2019] [Indexed: 12/15/2022] Open
Abstract
Neutrophils are the most abundant type of white blood cell in most mammals including humans. The primary role of these cells is host defense against microbes and clearance of tissue debris in order to facilitate wound healing and tissue regeneration. The recruitment of neutrophils from blood into tissues is a key step in this process and is mediated by numerous different chemoattractants. The neutrophil migratory response is essential for host defense and survival, but excessive tissue accumulation of neutrophils is observed in many inflammatory disorders and strongly correlates with disease pathology. The vitamin D binding protein (DBP) is a circulating multifunctional plasma protein that can significantly enhance the chemotactic activity of neutrophil chemoattractants both in vitro and in vivo. Recent in vivo studies using DBP deficient mice showed that DBP plays a larger and more central role during inflammation since it induces selective recruitment of neutrophils, and this cofactor function is not restricted to C5a, as prior in vitro studies indicated, but can enhance chemotaxis to many chemoattractants. DBP also is an extracellular scavenger for actin released from damaged/dead cells and formation of DBP-actin complexes is an immediate host response to tissue injury. Recent in vitro evidence indicates that DBP bound to G-actin, and not free DBP, functions as an indirect but essential cofactor for neutrophil migration. DBP-actin complexes always will be formed regardless of what initiated an inflammation, since release of actin from damaged cells is a common feature in all types of injury and DBP is abundant and ubiquitous in all extracellular fluids. Indeed, these complexes have been detected in blood and tissue fluids from both humans and experimental animals following various forms of injury. The published data strongly supports the premise that DBP-actin complexes are the functional neutrophil chemotactic cofactor that enhances neutrophil chemotaxis in vitro and augments neutrophilic inflammation in vivo. This review will assess the fundamental role of DBP in neutrophilic inflammation and injury.
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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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Bonsai Gelsolin Survives Heat Induced Denaturation by Forming β-Amyloids which Leach Out Functional Monomer. Sci Rep 2018; 8:12602. [PMID: 30135452 PMCID: PMC6105678 DOI: 10.1038/s41598-018-30951-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 07/31/2018] [Indexed: 12/13/2022] Open
Abstract
Here, we report that minimal functional gelsolin i.e. fragment 28–161 can display F-actin depolymerizing property even after heating the protein to 80 °C. Small angle X-ray scattering (SAXS) data analysis confirmed that under Ca2+-free conditions, 28–161 associates into monomer to dimer and tetramer, which later forms β-amyloids, but in presence of Ca2+, it forms dimers which proceed to non-characterizable aggregates. The dimeric association also explained the observed decrease in ellipticity in circular dichroism experiments with increase in temperature. Importantly, SAXS data based models correlated well with our crystal structure of dimeric state of 28–161. Characterization of higher order association by electron microscopy, Congo red and ThioflavinT staining assays further confirmed that only in absence of Ca2+ ions, heating transforms 28–161 into β-amyloids. Gel filtration and other experiments showed that β-amyloids keep leaching out the monomer, and the release rates could be enhanced by addition of L-Arg to the amyloids. F-actin depolymerization showed that addition of Ca2+ ions to released monomer initiated the depolymerization activity. Overall, we propose a way to compose a supramolecular assembly which releases functional protein in sustained manner which can be applied for varied potentially therapeutic interventions.
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Rithidech KN, Reungpatthanaphong P, Tungjai M, Jangiam W, Honikel L, Whorton EB. Persistent depletion of plasma gelsolin (pGSN) after exposure of mice to heavy silicon ions. LIFE SCIENCES IN SPACE RESEARCH 2018; 17:83-90. [PMID: 29753417 DOI: 10.1016/j.lssr.2018.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 04/11/2018] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
Little is known about plasma proteins that can be used as biomarkers for early and late responses to radiation. The purpose of this study was to determine a link between depletion of plasma gelsolin (pGSN) and cell-death as well as inflammatory responses in the lung (one of the tissues known to be radiosensitive) of the same exposed CBA/CaJ mice after exposure to heavy silicon (28Si) ions. To prevent the development of multiple organ dysfunctions, pGSN (an important component of the extracellular actin-scavenging system) is responsible for the removal of actin that is released into the circulation during inflammation and from dying cells. We evaluated the levels of pGSN in plasma collected from groups of mice (5 mice in each) at 1 week (wk) and 1 month (1 mo) after exposure whole body to different doses of 28Si ions, i.e. 0, 0.1, 0.25, or 0.5 Gy (2 fractionated exposures, 15 days apart that totaled each selected dose). In the same mouse, the measurements of pGSN levels were coupled with the quantitation of injuries in the lung, determined by (a) the levels of cleaved poly (ADP-ribose) polymerase (cleaved-PARP), a marker of apoptotic cell-death, (b) the levels of activated nuclear factor-kappa B (NF-κB) and selected cytokines, i.e. tumor necrosis factor-alpha (TNF-α), interleukin-1 beta (IL-1β), and IL-6, from tissue-lysates of the lung. Further, the ratio of neutrophils and lymphocytes (N/L) was determined in the same mouse. Our data indicated: (i) the magnitude of pGSN depletion was dependent to radiation dose at both harvest times, (ii) a persistent depletion of pGSN up to 1 mo post-exposure to 0.25 or 0.5 Gy of 28Si ions, (iii) an inverse-correlation between pGSN depletion and increased levels of cleaved-PARP, including activated NF-κB/pro-inflammatory cytokines in the lung, and (iv) at both harvest times, statistically significant increases in the N/L ratio in groups of mice exposed to 0.5 Gy only. Our findings suggested that depletion in pGSN levels reflects not only the responses to 28Si-ion exposure at both harvest times but also early and late-occurring damage.
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Affiliation(s)
| | - Paiboon Reungpatthanaphong
- Pathology Department, Stony Brook University, Stony Brook, NY 11794-8691, USA; Department of Applied Radiation and Isotopes, Faculty of Sciences, Kasetsart University, Chatuchuck, Bangkok 10900, Thailand
| | - Montree Tungjai
- Pathology Department, Stony Brook University, Stony Brook, NY 11794-8691, USA; Department of Radiologic Technology, Faculty of Associated Medical Sciences, Center of Excellence for Molecular Imaging, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Witawat Jangiam
- Pathology Department, Stony Brook University, Stony Brook, NY 11794-8691, USA; Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi 20131, Thailand
| | - Louise Honikel
- Pathology Department, Stony Brook University, Stony Brook, NY 11794-8691, USA
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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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Belsky JB, Rivers EP, Filbin MR, Lee PJ, Morris DC. Thymosin beta 4 regulation of actin in sepsis. Expert Opin Biol Ther 2018; 18:193-197. [PMID: 29508629 DOI: 10.1080/14712598.2018.1448381] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
INTRODUCTION Sepsis is the dysregulated host response to an infection resulting in life-threatening organ damage. Thymosin Beta 4 is an actin binding protein that inhibits the polymerization of G-actin into F-actin and improves mortality when administered intravenously to septic rats. Thymosin Beta 4 decreases inflammatory mediators, lowers reactive oxygen species, up-regulates anti-oxidative enzymes, anti-inflammatory genes, and anti-apoptotic enzymes making it an interesting protein to study in sepsis. AREAS COVERED The authors summarize the current knowledge of actin and Thymosin Beta 4 as it relates to sepsis via a comprehensive literature search. EXPERT OPINION Sepsis results in measurable levels of F-actin in the circulation as well as a decreased concentration of Thymosin Beta 4. It is speculated that F-actinemia contributes to microcirculatory perturbations present in patients with sepsis by disturbing laminar flow. Given that Thymosin Beta 4 inhibits the polymerization of F-actin, it is possible that Thymosin Beta 4 decreases mortality in sepsis via the regulation of actin as well as its other anti-inflammatory properties and should be further pursued as a clinical trial in humans with sepsis.
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Affiliation(s)
- Justin B Belsky
- a Department of Emergency Medicine , Yale-New Haven Hospital , New Haven , CT , USA
| | - Emanuel P Rivers
- b Department of Emergency Medicine and Critical Care , Wayne State University , Detroit , MI , USA.,c Department of Emergency Medicine and Critical Care , Henry Ford Hospital , Detroit , MI , USA
| | - Michael R Filbin
- d Department of Emergency Medicine , Massachusetts General Hospital , Boston , MA , USA
| | - Patty J Lee
- e Department of Internal Medicine, Yale-New Haven Hospital , The Anlyan Center , New Haven , CT , USA
| | - Daniel C Morris
- f Department of Emergency Medicine , Henry Ford Hospital , Detroit , MI , USA
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Sharma NK, Tashima AK, Brunialti MKC, Ferreira ER, Torquato RJS, Mortara RA, Machado FR, Assuncao M, Rigato O, Salomao R. Proteomic study revealed cellular assembly and lipid metabolism dysregulation in sepsis secondary to community-acquired pneumonia. Sci Rep 2017; 7:15606. [PMID: 29142235 PMCID: PMC5688086 DOI: 10.1038/s41598-017-15755-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 11/01/2017] [Indexed: 12/21/2022] Open
Abstract
Sepsis is a life-threatening disorder characterized by organ dysfunction and a major cause of mortality worldwide. The major challenge in studying sepsis is its diversity in such factors as age, source of infection and etiology. Recently, genomic and proteomic approaches have improved our understanding of its complex pathogenesis. In the present study, we use quantitative proteomics to evaluate the host proteome response in septic patients secondary to community-acquired pneumonia (CAP). Samples obtained at admission and after 7 days of follow-up were analyzed according to the outcomes of septic patients. The patients' proteome profiles were compared with age- and gender-matched healthy volunteers. Bioinformatic analyses of differentially expressed proteins showed alteration in the cytoskeleton, cellular assembly, movement, lipid metabolism and immune responses in septic patients. Actin and gelsolin changes were assessed in mononuclear cells using immunofluorescence, and a higher expression of gelsolin and depletion of actin were observed in survivor patients. Regarding lipid metabolism, changes in cholesterol, HDL and apolipoproteins were confirmed using enzymatic colorimetric methods in plasma. Transcriptomic studies revealed a massive change in gene expression in sepsis. Our proteomic results stressed important changes in cellular structure and metabolism, which are possible targets for future interventions of sepsis.
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Affiliation(s)
- Narendra Kumar Sharma
- Division of Infectious Diseases, Escola Paulista de Medicina, Hospital São Paulo, Universidade Federal de Sao Paulo, Sao Paulo, 04039-032, Brazil
| | - Alexandre Keiji Tashima
- Departamento de Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo, 04023-900, Brazil
| | - Milena Karina Colo Brunialti
- Division of Infectious Diseases, Escola Paulista de Medicina, Hospital São Paulo, Universidade Federal de Sao Paulo, Sao Paulo, 04039-032, Brazil
| | - Eden Ramalho Ferreira
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, 04023-062, Brazil
| | - Ricardo Jose Soares Torquato
- Departamento de Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo, 04023-900, Brazil
| | - Renato Arruda Mortara
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, 04023-062, Brazil
| | - Flavia Ribeiro Machado
- Intensive Care Unit, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, 04024-002, Brazil
| | - Murillo Assuncao
- Intensive Care Unit, Hospital Israelita Albert Einstein, Sao Paulo, 05652- 900, Brazil
| | - Otelo Rigato
- Division of Infectious Diseases, Escola Paulista de Medicina, Hospital São Paulo, Universidade Federal de Sao Paulo, Sao Paulo, 04039-032, Brazil
- Intensive Care Unit, Hospital Sirio Libanes, Sao Paulo, 01409-001, Brazil
| | - Reinaldo Salomao
- Division of Infectious Diseases, Escola Paulista de Medicina, Hospital São Paulo, Universidade Federal de Sao Paulo, Sao Paulo, 04039-032, Brazil.
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Afzal S, Nordestgaard BG. Vitamin D and Risk of Cardiovascular Disease. Arterioscler Thromb Vasc Biol 2017; 37:1981-1982. [DOI: 10.1161/atvbaha.117.310204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Shoaib Afzal
- From the Department of Clinical Biochemistry and The Copenhagen General Population Study, Herlev and Gentofte Hospital, Copenhagen University Hospital, Denmark (S.A., B.G.N.); Faculty of Health and Medical Sciences, University of Copenhagen, Denmark (B.G.N.); and The Copenhagen City Heart Study, Frederiksberg Hospital, Copenhagen University Hospital, Denmark (B.G.N.)
| | - Børge G. Nordestgaard
- From the Department of Clinical Biochemistry and The Copenhagen General Population Study, Herlev and Gentofte Hospital, Copenhagen University Hospital, Denmark (S.A., B.G.N.); Faculty of Health and Medical Sciences, University of Copenhagen, Denmark (B.G.N.); and The Copenhagen City Heart Study, Frederiksberg Hospital, Copenhagen University Hospital, Denmark (B.G.N.)
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Pihl TH, Jacobsen S, Olsen DT, Højrup P, Grosche A, Freeman DE, Andersen PH, Houen G. Characterization of equine vitamin D-binding protein, development of an assay, and assessment of plasma concentrations of the protein in healthy horses and horses with gastrointestinal disease. Am J Vet Res 2017; 78:718-728. [PMID: 28541149 DOI: 10.2460/ajvr.78.6.718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To purify and characterize equine vitamin D-binding protein (VDBP) from equine serum and to evaluate plasma concentrations of VDBP in healthy horses and horses with gastrointestinal injury or disease. ANIMALS 13 healthy laboratory animals (8 mice and 5 rabbits), 61 healthy horses, 12 horses with experimentally induced intestinal ischemia and reperfusion (IR), and 59 horses with acute gastrointestinal diseases. PROCEDURES VDBP was purified from serum of 2 healthy horses, and recombinant equine VDBP was obtained through a commercial service. Equine VDBP was characterized by mass spectrometry. Monoclonal and polyclonal antibodies were raised against equine VDBP, and a rocket immunoelectrophoresis assay for equine VDBP was established. Plasma samples from 61 healthy horses were used to establish working VDBP reference values for study purposes. Plasma VDBP concentrations were assessed at predetermined time points in horses with IR and in horses with naturally occurring gastrointestinal diseases. RESULTS The working reference range for plasma VDBP concentration in healthy horses was 531 to 1,382 mg/L. Plasma VDBP concentrations were significantly decreased after 1 hour of ischemia in horses with IR, compared with values prior to induction of ischemia, and were significantly lower in horses with naturally occurring gastrointestinal diseases with a colic duration of < 12 hours than in healthy horses. CONCLUSIONS AND CLINICAL RELEVANCE Plasma VDBP concentrations were significantly decreased in horses with acute gastrointestinal injury or disease. Further studies and the development of a clinically relevant assay are needed to establish the reliability of VDBP as a diagnostic and prognostic marker in horses.
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Nonocclusive mesenteric infarction after cardiac surgery: potential biomarkers. J Surg Res 2017; 211:21-29. [DOI: 10.1016/j.jss.2016.12.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/03/2016] [Accepted: 12/01/2016] [Indexed: 12/13/2022]
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Ordija CM, Chiou TTY, Yang Z, Deloid GM, de Oliveira Valdo M, Wang Z, Bedugnis A, Noah TL, Jones S, Koziel H, Kobzik L. Free actin impairs macrophage bacterial defenses via scavenger receptor MARCO interaction with reversal by plasma gelsolin. Am J Physiol Lung Cell Mol Physiol 2017; 312:L1018-L1028. [PMID: 28385809 PMCID: PMC5495953 DOI: 10.1152/ajplung.00067.2017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/27/2017] [Accepted: 03/29/2017] [Indexed: 12/20/2022] Open
Abstract
Lung injury can release intracellular actin into the alveolar milieu and is also associated with increased susceptibility to secondary infections. We investigated the effect of free (extracellular) actin on lung macrophage host defense functions. Western blot analysis demonstrated free actin release into the lung lavage fluids of mouse models of ozone injury, influenza infection, and secondary pneumococcal pneumonia and in samples from patients following burn and inhalation injury. Using levels comparable with those observed in lung injury, we found that free actin markedly inhibited murine lung macrophage binding and uptake in vitro of S. pneumoniae, S. aureus, and E. coli, (e.g., S. pneumoniae, mean %inhibition, actin vs. vehicle: 85 ± 0.3 (SD); n = 22, P < .001). Similar effects were observed on the ability of primary human macrophages to bind and ingest fluorescent Saureus (~75% inhibition). Plasma gelsolin (pGSN), a protein that functions to bind and cleave actin, restored bacterial binding and uptake by both murine and human macrophages. Scavenger receptor inhibitors reduced binding of fluorescent actin by murine macrophages [fluorescence index (×10-3) after incubation with vehicle, actin, or actin + polyinosinic acid, respectively: 0.8 ± 0.7, 101.7 ± 50.7, or 52.7 ± 16.9; n = 5-6, P < 0.05]. In addition, actin binding was reduced in a MARCO/SR-AI/II-deficient cell line and by normal AMs obtained from MARCO-/- mice. After release from injured cells during lung injury, free actin likely contributes to impaired host defense by blocking scavenger receptor binding of bacteria. This mechanism for increased risk of secondary infections after lung injury or inflammation may represent another target for therapeutic intervention with pGSN.
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Affiliation(s)
- Christine M Ordija
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Terry Ting-Yu Chiou
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts.,Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang-Gung University College of Medicine, Kaohsiung, Taiwan
| | - Zhiping Yang
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Glen M Deloid
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Melina de Oliveira Valdo
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Zhi Wang
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Alice Bedugnis
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Terry L Noah
- Department of Pediatrics, Pulmonology Division, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Samuel Jones
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - Henry Koziel
- Division of Pulmonary, Critical Care, and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Lester Kobzik
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts;
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Sudakov NP, Klimenkov IV, Byvaltsev VA, Nikiforov SB, Konstantinov YM. Extracellular Actin in Health and Disease. BIOCHEMISTRY (MOSCOW) 2017; 82:1-12. [PMID: 28320282 DOI: 10.1134/s0006297917010011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review considers the functions of extracellular actin - cell surface bound, associated with extracellular matrix, or freely circulating. The role of this protein in different pathological processes is analyzed: its toxic effects and involvement in autoimmune diseases as an autoantigen. The extracellular actin clearance system and its role in protection against the negative effects of actin are characterized. Levels of free-circulating actin, anti-actin immunoglobulins, and components of the actin clearance system as prognostic biomarkers for different diseases are reviewed. Experimental approaches to protection against excessive amounts of free-circulating F-actin are discussed.
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Affiliation(s)
- N P Sudakov
- Irkutsk Surgery and Traumatology Research Center, Irkutsk, 664003, Russia.
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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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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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Huppertz B, Kingdom JCP. Apoptosis in the Trophoblast—Role of Apoptosis in Placental Morphogenesis. ACTA ACUST UNITED AC 2016; 11:353-62. [PMID: 15350247 DOI: 10.1016/j.jsgi.2004.06.002] [Citation(s) in RCA: 187] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Villous trophoblast is the epithelial cover of the placental villous tree and comes in direct contact with maternal blood. The turnover of villous trophoblast includes proliferation and differentiation of cytotrophoblast, syncytial fusion of cytotrophoblast with the overlying syncytiotrophoblast, differentiation in the syncytiotrophoblast, and finally extrusion of apoptotic material into the maternal circulation. In recent years, it has become clear that apoptosis is a normal constituent of trophoblast turnover and the release of apoptotic material does not lead to an inflammatory response of the mother. During preeclampsia there seems to be an altered balance between proliferation and apoptosis of villous trophoblast leading to a dysregulation of the release from the syncytiotrophoblast. The normal apoptotic release may be reduced in favor of a necrotic release. Since apoptosis is still ongoing in the syncytiotrophoblast, a necrotic release of intrasyncytial and partly apoptotic material lead us to call this type of release "aponecrotic shedding." In this situation, cell-free components such as G-actin and DNA freely floating in maternal blood may trigger damage to the maternal endothelium, thereby triggering preeclampsia. This review highlights the importance of the apoptosis cascade in permitting normal physiologic turnover of villous trophoblast. It will demonstrate the participation of initial stages of this cascade within the cytotrophoblast and of the execution stages within the syncytiotrophoblast. Moreover, this review presents hypotheses of how dysregulation of the apoptosis cascade may be linked to endothelial dysfunction of the maternal vasculature in preeclampsia.
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Affiliation(s)
- Berthold Huppertz
- Department of Anatomy II, University Hospital RWTH, Aachen, Germany.
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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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Belsky JB, Morris DC, Bouchebl R, Filbin MR, Bobbitt KR, Jaehne AK, Rivers EP. Plasma levels of F-actin and F:G-actin ratio as potential new biomarkers in patients with septic shock. Biomarkers 2016; 21:180-5. [PMID: 26754286 DOI: 10.3109/1354750x.2015.1126646] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To compare plasma levels of F-actin, G-actin and thymosin beta 4 (TB4) in humans with septic shock, noninfectious systemic inflammatory response syndrome (SIRS) and healthy controls. RESULTS F-actin was significantly elevated in septic shock as compared with noninfectious SIRS and healthy controls. G-actin levels were greatest in the noninfectious SIRS group but significantly elevated in septic shock as compared with healthy controls. TB4 was not detectable in the septic shock or noninfectious SIRS group above the assay's lowest detection range (78 ng/ml). CONCLUSIONS F-actin is significantly elevated in patients with septic shock as compared with noninfectious SIRS. F-actin and the F:G-actin ratio are potential biomarkers for the diagnosis of septic shock.
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Affiliation(s)
- Justin B Belsky
- a Department of Emergency Medicine , Massachusetts General Hospital , Boston , MA , USA
| | - Daniel C Morris
- b Department of Emergency Medicine , Henry Ford Hospital , Detroit , MI , USA
| | - Ralph Bouchebl
- c Department of Emergency Medicine , American University of Beirut , Beirut , Lebanon
| | - Michael R Filbin
- a Department of Emergency Medicine , Massachusetts General Hospital , Boston , MA , USA
| | - Kevin R Bobbitt
- d Department of Public Health Sciences , Henry Ford Hospital , Detroit , MI , USA , and
| | - Anja K Jaehne
- b Department of Emergency Medicine , Henry Ford Hospital , Detroit , MI , USA .,e Department of Quality , Northstar Health System , Iron River , MI , USA
| | - Emanuel P Rivers
- b Department of Emergency Medicine , Henry Ford Hospital , Detroit , MI , USA
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Abstract
BACKGROUND Acute rheumatic fever is an autoimmune, inflammatory, and multi-systemic disease secondary to pharyngitis and is caused by group A streptococcus. In developing countries, acute rheumatic fever is the most common cause of acquired heart disease. Gelsolin is a calcium-dependent, multi-functional actin-regulatory protein circulating in the plasma of healthy human beings. The correlation between blood gelsolin levels and inflammatory conditions suggests the potential benefit of gelsolin as a prognostic marker. The aim of the present study was to appraise the association of gelsolin and acute rheumatic carditis in childhood. MATERIALS AND METHODS Plasma gelsolin levels were measured and echocardiographic examinations were performed in patients (n=37) with acute rheumatic carditis and compared with those of age- and gender-matched healthy controls (n=24). RESULTS The plasma gelsolin levels in children with acute rheumatic carditis were significantly lower compared with controls (197±218 versus 322±255 mg/L, p=0.039). There was a significant correlation among gelsolin levels and the grade of mitral regurgitation (p=0.030), left ventricular end-diastolic diameter (p=0.017), and left ventricular end-systolic diameter (p=0.028) at diagnosis. CONCLUSIONS Levels of the gelsolin plasma isoform were decreased in patients with acute rheumatic carditis compared with healthy controls. Gelsolin may be used as a biochemical marker for acute rheumatic carditis.
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Denburg MR, Bhan I. Vitamin D-Binding Protein in Health and Chronic Kidney Disease. Semin Dial 2015; 28:636-44. [PMID: 26332676 DOI: 10.1111/sdi.12422] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Vitamin D-binding protein (DBP) is a multifunctional protein that has attracted increasing interest in recent years, largely because of its potential role in modulating the activity of vitamin D. Nearly all circulating vitamin D (~85-90%) circulates bound to DBP, with a smaller proportion bound to albumin, leaving <5% circulating freely. DBP may also play roles beyond vitamin D binding, with potential roles in the immune system and elsewhere. Numerous polymorphisms of DBP exist around the world, and recent studies have identified relevance of different DBP phenotypes in determining DBP concentration and vitamin D affinity. This review focuses on the known roles of DBP in health and kidney disease, and current views on the relevance of DBP polymorphisms.
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Affiliation(s)
- Michelle R Denburg
- Departments of Pediatrics and Epidemiology, The Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ishir Bhan
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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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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Chou SHY, Robertson CS. Monitoring biomarkers of cellular injury and death in acute brain injury. Neurocrit Care 2014; 21 Suppl 2:S187-214. [PMID: 25208676 PMCID: PMC7888263 DOI: 10.1007/s12028-014-0039-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Molecular biomarkers have revolutionalized diagnosis and treatment of many diseases, such as troponin use in myocardial infarction. Urgent need for high-fidelity biomarkers in neurocritical care has resulted in numerous studies reporting potential candidate biomarkers. METHODS We performed an electronic literature search and systematic review of English language articles on cellular/molecular biomarkers associated with outcome and with disease-specific secondary complications in adult patients with acute ischemic stroke (AIS), intracerebral hemorrhage (ICH), subarachnoid hemorrhage (SAH), traumatic brain injury (TBI), and post-cardiac arrest hypoxic ischemic encephalopathic injuries (HIE). RESULTS A total of 135 articles were included. Though a wide variety of potential biomarkers have been identified, only neuron-specific enolase has been validated in large cohorts and shows 100% specificity for poor outcome prediction in HIE patients not treated with therapeutic hypothermia. There are many promising candidate blood and CSF biomarkers in SAH, AIS, ICH, and TBI, but none yet meets criteria for routine clinical use. CONCLUSION Current studies vary significantly in patient selection, biosample collection/processing, and biomarker measurement protocols, thereby limiting the generalizability of overall results. Future large prospective studies with standardized treatment, biosample collection, and biomarker measurement and validation protocols are necessary to identify high-fidelity biomarkers in neurocritical care.
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Affiliation(s)
- Sherry H-Y Chou
- Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA,
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Abstract
Preeclampsia remains a significant obstetric risk worldwide. The pathophysiology of preeclampsia is complex, with multiple stages involving maladaptations in both placental and maternal physiology. The placenta links the pre-clinical stage of impaired remodeling of the uterine vasculature, occurring in early pregnancy, to the later clinical stages characterised by the maternal syndrome of hypertension and proteinuria. This review focuses on some of the recent candidates for the missing links in this process.
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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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Yu CC, Zendzian-Piotrowska M, Charmas M, Długołęcka B, Baranowski M, Górski J, Bucki R. Change in blood gelsolin concentration in response to physical exercise. Biol Sport 2014; 30:169-72. [PMID: 24744484 PMCID: PMC3944569 DOI: 10.5604/20831862.1059812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2013] [Indexed: 11/13/2022] Open
Abstract
Plasma gelsolin (pGSN) produced by muscle is an abundant protein of extracellular fluids capable of severing actin filaments and eliminating actin from the circulation. Additionally, pGSN modulates the cellular effects of some bioactive lipids. In this study we test the hypothesis that hormonal and metabolic adaptations to exercise are associated with changes in gelsolin concentration in blood. Plasma samples were collected from twenty healthy males recruited from untrained (UT, n=10) and endurance trained (ET, n=10) groups that performed 30-60 minutes of exercise on a cycloergometer at a workload corresponding to 70% of VO2max. Gelsolin concentration was determined by quantitative Western blot analysis with an anti-human gelsolin antibody. The gelsolin concentration in UT and ET subjects before starting exercise ranged from 104 to 330 and 163 to 337 µg · ml(-1) respectively. After 30 minutes of exercise we observed a significant decrease of plasma gelsolin in the UT group (p<0.05) while the gelsolin concentration in the ET group rose on average from 244 to 271 µg · ml(-1). However, this increase did not reach statistical significance. Endurance training might increase the ability of muscle tissue to express plasma gelsolin as part of an adaptive mechanism.
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Affiliation(s)
- C-C Yu
- Institute for Medicine and Engineering, University of Pennsylvania, 1010 Vagelos Research Laboratories, 3340 Smith Walk, Philadelphia, PA, 19104 U.S.A
| | | | - M Charmas
- Department of Biochemistry, Faculty of Physical Education and Sport, Józef Piłsudski University of Physical Education, Biała Podlaska, Poland
| | - B Długołęcka
- Department of Biochemistry, Faculty of Physical Education and Sport, Józef Piłsudski University of Physical Education, Biała Podlaska, Poland
| | - M Baranowski
- Department of Physiology, Medical University of Białystok, 15-230 Białystok, Poland
| | - J Górski
- Department of Physiology, Medical University of Białystok, 15-230 Białystok, Poland
| | - R Bucki
- Institute for Medicine and Engineering, University of Pennsylvania, 1010 Vagelos Research Laboratories, 3340 Smith Walk, Philadelphia, PA, 19104 U.S.A
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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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