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Kanno Y, Shu E. α2-Antiplasmin as a Potential Therapeutic Target for Systemic Sclerosis. Life (Basel) 2022; 12:life12030396. [PMID: 35330147 PMCID: PMC8953682 DOI: 10.3390/life12030396] [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: 02/07/2022] [Revised: 03/04/2022] [Accepted: 03/04/2022] [Indexed: 11/24/2022] Open
Abstract
Systemic sclerosis is a connective tissue disease of unknown origin that is characterized by immune system abnormalities, vascular damage, and extensive fibrosis of the skin and visceral organs. α2-antiplasmin is known to be the main plasmin inhibitor and has various functions such as cell differentiation and cytokine production, as well as the regulation of the maintenance of the immune system, endothelial homeostasis, and extracellular matrix metabolism. The expression of α2-antiplasmin is elevated in dermal fibroblasts from systemic sclerosis patients, and the blockade of α2-antiplasmin suppresses fibrosis progression and vascular dysfunction in systemic sclerosis model mice. α2-antiplasmin may have promise as a potential therapeutic target for systemic sclerosis. This review considers the role of α2-antiplasmin in the progression of systemic sclerosis.
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Affiliation(s)
- Yosuke Kanno
- Department of Clinical Pathological Biochemistry, Faculty of Pharmaceutical Science, Doshisha Women’s College of Liberal Arts, 97-1 Kodo Kyotanabe, Kyoto 610-0395, Japan
- Department of Dermatology, Graduate School of Medicine, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan;
- Correspondence: ; Tel.:+81-0774-65-8629
| | - En Shu
- Department of Dermatology, Graduate School of Medicine, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan;
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van der Plas MJA, Cai J, Petrlova J, Saleh K, Kjellström S, Schmidtchen A. Method development and characterisation of the low-molecular-weight peptidome of human wound fluids. eLife 2021; 10:e66876. [PMID: 34227939 PMCID: PMC8260221 DOI: 10.7554/elife.66876] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 06/03/2021] [Indexed: 01/13/2023] Open
Abstract
The normal wound healing process is characterised by proteolytic events, whereas infection results in dysfunctional activations by endogenous and bacterial proteases. Peptides, downstream reporters of these proteolytic actions, could therefore serve as a promising tool for diagnosis of wounds. Using mass-spectrometry analyses, we here for the first time characterise the peptidome of human wound fluids. Sterile post-surgical wound fluids were found to contain a high degree of peptides in comparison to human plasma. Analyses of the peptidome from uninfected healing wounds and Staphylococcus aureus -infected wounds identify unique peptide patterns of various proteins, including coagulation and complement factors, proteases, and antiproteinases. Together, the work defines a workflow for analysis of peptides derived from wound fluids and demonstrates a proof-of-concept that such fluids can be used for analysis of qualitative differences of peptide patterns from larger patient cohorts, providing potential biomarkers for wound healing and infection.
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Affiliation(s)
- Mariena JA van der Plas
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund UniversityLundSweden
- LEO Foundation Center for Cutaneous Drug Delivery, Department of Pharmacy, University of CopenhagenCopenhagenDenmark
| | - Jun Cai
- LEO Foundation Center for Cutaneous Drug Delivery, Department of Pharmacy, University of CopenhagenCopenhagenDenmark
| | - Jitka Petrlova
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund UniversityLundSweden
| | - Karim Saleh
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund UniversityLundSweden
- Dermatology, Skane University HospitalLundSweden
| | - Sven Kjellström
- Division of Mass Spectrometry, Department of Clinical Sciences, Lund UniversityLundSweden
| | - Artur Schmidtchen
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund UniversityLundSweden
- Dermatology, Skane University HospitalLundSweden
- Copenhagen Wound Healing Center, Bispebjerg Hospital, Department of Biomedical Sciences, University of CopenhagenCopenhagenDenmark
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Abdul S, Dekkers DHW, Ariëns RAS, Leebeek FWG, Rijken DC, Uitte de Willige S. On the localization of the cleavage site in human alpha-2-antiplasmin, involved in the generation of the non-plasminogen binding form. J Thromb Haemost 2020; 18:1162-1170. [PMID: 32034861 PMCID: PMC7317795 DOI: 10.1111/jth.14761] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Alpha-2-antiplasmin (α2AP) is the main natural inhibitor of plasmin. The C-terminus of α2AP is crucial for the initial interaction with plasmin(ogen) and the rapid inhibitory mechanism. Approximately 35% of circulating α2AP has lost its C-terminus (non-plasminogen binding α2AP/NPB-α2AP) and thereby its rapid inhibitory capacity. The C-terminal cleavage site of α2AP is still unknown. A commercially available monoclonal antibody against α2AP (TC 3AP) detects intact but not NPB-α2AP, suggesting that the cleavage site is located N-terminally from the epitope of TC 3AP. OBJECTIVES To determine the epitope of TC 3AP and then to localize the C-terminal cleavage site of α2AP. METHODS For epitope mapping of TC 3AP, commercially available plasma purified α2AP was enzymatically digested with Asp-N, Glu-C, or Lys-N. The resulting peptides were immunoprecipitated using TC 3AP-loaded Dynabeads® Protein G. Bound peptides were eluted and analyzed by liquid chromatography-tandem mass spectometry (LC-MS/MS). To localize the C-terminal cleavage site precisely, α2AP (intact and NPB) was purified from plasma and analyzed by LC-MS/MS after enzymatic digestion with Arg-C. RESULTS We localized the epitope of TC 3AP between amino acid residues Asp428 and Gly439. LC-MS/MS data from plasma purified α2AP showed that NPB-α2AP results from cleavage at Gln421-Asp422 as preferred site, but also after Leu417, Glu419, Gln420, or Asp422. CONCLUSIONS The C-terminal cleavage site of human α2AP is located N-terminally from the TC 3AP epitope. Because C-terminal cleavage of α2AP can occur after multiple residues, different proteases may be responsible for the generation of NPB-α2AP.
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Affiliation(s)
- Shiraazkhan Abdul
- Department of HematologyErasmus University Medical Center RotterdamRotterdamThe Netherlands
| | - Dick H. W. Dekkers
- Center for ProteomicsErasmus University Medical Center RotterdamRotterdamThe Netherlands
| | - Robert A. S. Ariëns
- Thrombosis and Tissue Repair GroupLeeds Institute of Cardiovascular and Metabolic MedicineSchool of MedicineUniversity of LeedsLeedsUK
| | - Frank W. G. Leebeek
- Department of HematologyErasmus University Medical Center RotterdamRotterdamThe Netherlands
| | - Dingeman C. Rijken
- Department of HematologyErasmus University Medical Center RotterdamRotterdamThe Netherlands
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Mutch NJ. Regulation of Fibrinolysis by Platelets. Platelets 2019. [DOI: 10.1016/b978-0-12-813456-6.00023-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lü X, Zhang H, Huang Y, Zhang Y. A proteomics study to explore the role of adsorbed serum proteins for PC12 cell adhesion and growth on chitosan and collagen/chitosan surfaces. Regen Biomater 2018; 5:261-273. [PMID: 30338124 PMCID: PMC6184651 DOI: 10.1093/rb/rby017] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/28/2018] [Accepted: 06/02/2018] [Indexed: 12/15/2022] Open
Abstract
The aim of this article is to apply proteomics in the comparison of the molecular mechanisms of PC12 cell adhesion and growth mediated by the adsorbed serum proteins on the surfaces of chitosan and collagen/chitosan films. First, the chitosan and the collagen/chitosan films were prepared by spin coating; and their surface morphologies were characterized by scanning electron microscopy, X-ray energy dispersive spectroscopy, contact angle measurement and Fourier transform infrared spectroscopy. Subsequently, cell proliferation experiments on two materials were performed and the dynamic curves of protein adsorption on their surfaces were measured. Then, proteomics and bioinformatics were used to analyze and compare the adsorbed serum proteins on the surfaces of two biomaterials; and their effects on cell adhesion were discussed. The results showed that the optimum concentration of chitosan film was 2% w/v. When compared with chitosan film, collagen/chitosan film promoted the growth and proliferation of PC12 cells more significantly. Although the dynamic curves showed no significant difference in the total amount of the adsorbed proteins on both surfaces, proteomics and bioinformatics analyses revealed a difference in protein types: the chitosan surface adsorbed more vitronectin whereas collagen/chitosan surface adsorbed more fibronectin 1 and contained more cell surface receptor binding sites and more Leu-Asp-Val sequences in its surface structure; the collagen/chitosan surface were more conducive to promoting cell adhesion and growth.
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Affiliation(s)
- Xiaoying Lü
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, P.R. China
| | - Heng Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, P.R. China
| | - Yan Huang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, P.R. China
| | - Yiwen Zhang
- SQ Medical Device Co., Ltd., Nanjing, P.R. China
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Singh S, Houng AK, Reed GL. Matrix Metalloproteinase-9 Mediates the Deleterious Effects of α2-Antiplasmin on Blood-Brain Barrier Breakdown and Ischemic Brain Injury in Experimental Stroke. Neuroscience 2017; 376:40-47. [PMID: 29294343 DOI: 10.1016/j.neuroscience.2017.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 12/12/2017] [Indexed: 11/30/2022]
Abstract
During acute brain ischemia, α2-antiplasmin markedly enhances brain injury, blood-brain barrier breakdown and matrix metalloproteinase-9 (MMP-9) expression. Although α2-antiplasmin inhibits fibrin thrombus-degradation, and MMP-9 is a collagen-degrading enzyme altering blood-brain barrier, both have similar deleterious effects on the ischemic brain. We examined the hypothesis that MMP-9 is an essential downstream mediator of α2-antiplasmin's deleterious effects during brain ischemia. Middle cerebral artery thromboembolic stroke was induced in a randomized, blinded fashion in mice with increased blood levels of α2-antiplasmin. There was a robust increase in MMP-9 expression (immunofluorescence) in the ischemic vs. the non-ischemic hemisphere of MMP-9+/+ but not MMP-9-/- mice, 24 h after stroke. Brain swelling and hemorrhage were significantly increased in the ischemic vs. the non-ischemic hemisphere of MMP-9+/+ mice. By comparison to MMP-9+/+ mice, the ischemic hemispheres of MMP-9-/- mice showed a ∼6-fold reduction in brain swelling (p < 0.001) and a ∼9-fold reduction in brain hemorrhage. Brain infarction (p < 0.0001) and TUNEL-positive cell death (p < 0.001) were significantly diminished in the ischemic hemisphere of MMP-9-/- mice vs. MMP-9+/+ mice. Ischemic breakdown of the blood-brain barrier and fibrin deposition were also significantly reduced in MMP-9-/- mice vs. MMP-9+/+ mice (p < 0.05), as measured by quantitative immunofluorescence. We conclude that MMP-9 deficiency ablates many of the deleterious effects of high α2-antiplasmin levels, significantly reducing blood-brain barrier breakdown, TUNEL-positive cell death, brain hemorrhage, swelling and infarction. This suggests that the two molecules may be in a shared pathway in which MMP-9 is essential downstream for the deleterious effects of α2-antiplasmin in ischemic stroke.
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Affiliation(s)
- Satish Singh
- Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA.
| | - Aiilyan K Houng
- Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA.
| | - Guy L Reed
- Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA.
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Natural heterogeneity of α2-antiplasmin: functional and clinical consequences. Blood 2015; 127:538-45. [PMID: 26626994 DOI: 10.1182/blood-2015-09-670117] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 11/24/2015] [Indexed: 01/24/2023] Open
Abstract
Human α2-antiplasmin (α2AP, also called α2-plasmin inhibitor) is the main physiological inhibitor of the fibrinolytic enzyme plasmin. α2AP inhibits plasmin on the fibrin clot or in the circulation by forming plasmin-antiplasmin complexes. Severely reduced α2AP levels in hereditary α2AP deficiency may lead to bleeding symptoms, whereas increased α2AP levels have been associated with increased thrombotic risk. α2AP is a very heterogeneous protein. In the circulation, α2AP undergoes both amino terminal (N-terminal) and carboxyl terminal (C-terminal) proteolytic modifications that significantly modify its activities. About 70% of α2AP is cleaved at the N terminus by antiplasmin-cleaving enzyme (or soluble fibroblast activation protein), resulting in a 12-amino-acid residue shorter form. The glutamine residue that serves as a substrate for activated factor XIII becomes more efficient after removal of the N terminus, leading to faster crosslinking of α2AP to fibrin and consequently prolonged clot lysis. In approximately 35% of circulating α2AP, the C terminus is absent. This C terminus contains the binding site for plasmin(ogen), the key component necessary for the rapid and efficient inhibitory mechanism of α2AP. Without its C terminus, α2AP can no longer bind to the lysine binding sites of plasmin(ogen) and is only a kinetically slow plasmin inhibitor. Thus, proteolytic modifications of the N and C termini of α2AP constitute major regulatory mechanisms for the inhibitory function of the protein and may therefore have clinical consequences. This review presents recent findings regarding the main aspects of the natural heterogeneity of α2AP with particular focus on the functional and possible clinical implications.
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Kawashita E, Kanno Y, Asayama H, Okada K, Ueshima S, Matsuo O, Matsuno H. Involvement of α2-antiplasmin in dendritic growth of hippocampal neurons. J Neurochem 2013; 126:58-69. [PMID: 23646899 DOI: 10.1111/jnc.12281] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 04/26/2013] [Accepted: 04/29/2013] [Indexed: 01/25/2023]
Abstract
The α2-Antiplasmin (α2AP) protein is known as a principal physiological inhibitor of plasmin, but we previously demonstrated that it acts as a regulatory factor for cellular functions independent of plasmin. α2AP is highly expressed in the hippocampus, suggesting a potential role for α2AP in hippocampal neuronal functions. However, the role for α2AP was unclear. This study is the first to investigate the involvement of α2AP in the dendritic growth of hippocampal neurons. The expression of microtubule-associated protein 2, which contributes to neurite initiation and neuronal growth, was lower in the neurons from α2AP⁻/⁻ mice than in the neurons from α2AP⁺/⁺ mice. Exogenous treatment with α2AP enhanced the microtubule-associated protein 2 expression, dendritic growth and filopodia formation in the neurons. This study also elucidated the mechanism underlying the α2AP-induced dendritic growth. Aprotinin, another plasmin inhibitor, had little effect on the dendritic growth of neurons, and α2AP induced its expression in the neurons from plaminogen⁻/⁻ mice. The activation of p38 MAPK was involved in the α2AP-induced dendritic growth. Therefore, our findings suggest that α2AP induces dendritic growth in hippocampal neurons through p38 MAPK activation, independent of plasmin, providing new insights into the role of α2AP in the CNS.
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Affiliation(s)
- Eri Kawashita
- Department of Clinical Pathological Biochemistry, Faculty of Pharmaceutical Science, Doshisha Women's College of Liberal Arts, Kyoto, Japan.
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Bohne-Kjersem A, Skadsheim A, Goksøyr A, Grøsvik BE. Candidate biomarker discovery in plasma of juvenile cod (Gadus morhua) exposed to crude North Sea oil, alkyl phenols and polycyclic aromatic hydrocarbons (PAHs). MARINE ENVIRONMENTAL RESEARCH 2009; 68:268-277. [PMID: 19682737 DOI: 10.1016/j.marenvres.2009.06.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Revised: 06/19/2009] [Accepted: 06/24/2009] [Indexed: 05/28/2023]
Abstract
In this study we have investigated protein changes in plasma of juvenile Atlantic cod (Gadus morhua) induced by crude North Sea oil and North Sea oil spiked with alkyl phenols and polycyclic aromatic hydrocarbons, a surrogate produced water composition. Using a proteomic approach, we identified 137 differentially expressed proteins at different levels of crude oil exposure. Many of the induced protein changes occurred at low levels of exposure. The results obtained with protein expression profiles after exposure to oil and surrogate produced water indicate effects on fibrinolysis and the complement cascade, the immune system, fertility-linked proteins, bone resorption, fatty acid metabolism as well as increased oxidative stress, impaired cell mobility and increased levels of proteins associated with apoptosis. Although the number of individuals and samples in this study is limited within each treatment group, the protein changes observed in this study represent a first screening for potential biomarker candidates in cod plasma reflecting potential effects of crude oil and produced water exposure on fish.
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Affiliation(s)
- Anneli Bohne-Kjersem
- Department of Molecular Biology, University of Bergen, PB 7800, N-5020 Bergen, Norway.
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Scherfer C, Tang H, Kambris Z, Lhocine N, Hashimoto C, Lemaitre B. Drosophila Serpin-28D regulates hemolymph phenoloxidase activity and adult pigmentation. Dev Biol 2008; 323:189-96. [DOI: 10.1016/j.ydbio.2008.08.030] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 07/09/2008] [Accepted: 08/21/2008] [Indexed: 01/18/2023]
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Abstract
The serpin α2-antiplasmin (SERPINF2) is the principal inhibitor of plasmin and inhibits fibrinolysis. Accordingly, α2-antiplasmin deficiency in humans results in uncontrolled fibrinolysis and a bleeding disorder. α2-antiplasmin is an unusual serpin, in that it contains extensive N- and C-terminal sequences flanking the serpin domain. The N-terminal sequence is crosslinked to fibrin by factor XIIIa, whereas the C-terminal region mediates the initial interaction with plasmin. To understand how this may happen, we have determined the 2.65Å X-ray crystal structure of an N-terminal truncated murine α2-antiplasmin. The structure reveals that part of the C-terminal sequence is tightly associated with the body of the serpin. This would be anticipated to position the flexible plasmin-binding portion of the C-terminus in close proximity to the serpin Reactive Center Loop where it may act as a template to accelerate serpin/protease interactions.
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Serpins in plants and green algae. Funct Integr Genomics 2007; 8:1-27. [PMID: 18060440 DOI: 10.1007/s10142-007-0059-2] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 09/06/2007] [Accepted: 09/15/2007] [Indexed: 01/02/2023]
Abstract
Control of proteolysis is important for plant growth, development, responses to stress, and defence against insects and pathogens. Members of the serpin protein family are likely to play a critical role in this control through irreversible inhibition of endogenous and exogenous target proteinases. Serpins have been found in diverse species of the plant kingdom and represent a distinct clade among serpins in multicellular organisms. Serpins are also found in green algae, but the evolutionary relationship between these serpins and those of plants remains unknown. Plant serpins are potent inhibitors of mammalian serine proteinases of the chymotrypsin family in vitro but, intriguingly, plants and green algae lack endogenous members of this proteinase family, the most common targets for animal serpins. An Arabidopsis serpin with a conserved reactive centre is now known to be capable of inhibiting an endogenous cysteine proteinase. Here, knowledge of plant serpins in terms of sequence diversity, inhibitory specificity, gene expression and function is reviewed. This was advanced through a phylogenetic analysis of amino acid sequences of expressed plant serpins, delineation of plant serpin gene structures and prediction of inhibitory specificities based on identification of reactive centres. The review is intended to encourage elucidation of plant serpin functions.
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