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Launois A, Valade S, Mariotte E, Galicier L, Azoulay E, Roose E, Vanhoorelbeke K, Veyradier A, Joly BS. Hemophagocytic lymphohistiocytosis is associated with deficiency and closed conformation of ADAMTS-13. Res Pract Thromb Haemost 2024; 8:102292. [PMID: 38371335 PMCID: PMC10869956 DOI: 10.1016/j.rpth.2023.102292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/09/2023] [Accepted: 11/16/2023] [Indexed: 02/20/2024] Open
Abstract
Background A disintegrin and metalloprotease with thrombospondin type 1 repeats, member 13 (ADAMTS-13) is the specific von Willebrand factor-cleaving protease and circulates in a closed and latent conformation due to a spacer/CUB1 domain interaction. ADAMTS-13 is allosterically activated after binding of its substrate or antibodies, inducing an open conformation. Recently, we suggested a potential role of plasmin (fibrinolysin) in hemostasis disorders reported in most patients with hemophagocytic lymphohistiocytosis (HLH), a rare and life-threatening condition related to a severe systemic inflammatory state. Most patients with HLH had a partial ADAMTS-13 deficiency, and plasmin could induce a truncation of the C-terminal part of ADAMTS-13 and thus an open conformation. Objectives To understand the effect of plasmin on ADAMTS-13, our study aimed to investigate ADAMTS-13 conformation in patients with HLH. Methods Forty-five critically ill patients with HLH were prospectively enrolled between April 2015 and December 2018. ADAMTS-13 activity was measured by fluorescent resonance energy transfer-VWF73 assay, ADAMTS-13 antigen, and conformation with our homemade 3H9-enzyme-linked immunosorbent assay and 1C4-enzyme-linked immunosorbent assay. Results ADAMTS-13 activity ranged from <10 to 65 IU/dL, and 41 of the 45 patients had a quantitative deficiency in ADAMTS-13 (activity <50 IU/dL). Twenty patients had a severe ADAMTS-13 deficiency (activity <20 IU/dL). ADAMTS-13 conformation was folded in all patients under normal conditions. Surprisingly, the switch of ADAMTS-13 conformation expected with the monoclonal antibody 17G2 (anti-CUB1) was disturbed in 6 patients (activity <20 IU/dL). Conclusion Our study reported that ADAMTS-13 conformation is closed in HLH and provides an indirect proof that plasmin is not able to massively degrade ADAMTS-13. Further studies on glycosylation and citrullination profiles of ADAMTS-13 are needed to understand their role in HLH.
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Affiliation(s)
- Amélie Launois
- Service d’Hématologie biologique, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
- Equipe d'Accueil 3518, Institut de Recherche Saint-Louis, Hôpital Saint-Louis, Université Paris Cité, Paris, France
| | - Sandrine Valade
- Service de Réanimation médicale, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
| | - Eric Mariotte
- Service de Réanimation médicale, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
| | - Lionel Galicier
- Service d’Immunologie clinique, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
| | - Elie Azoulay
- Service de Réanimation médicale, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
| | - Elien Roose
- Laboratory for Thrombosis Research, Interdisciplinarity Research Facility Life Sciences, Katholieke Universiteit Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, Interdisciplinarity Research Facility Life Sciences, Katholieke Universiteit Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Agnès Veyradier
- Service d’Hématologie biologique, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
- Equipe d'Accueil 3518, Institut de Recherche Saint-Louis, Hôpital Saint-Louis, Université Paris Cité, Paris, France
| | - Bérangère S. Joly
- Service d’Hématologie biologique, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris Nord, Université Paris Cité, Paris, France
- Equipe d'Accueil 3518, Institut de Recherche Saint-Louis, Hôpital Saint-Louis, Université Paris Cité, Paris, France
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Sialic acid-containing glycans play a role in the activity of snake venom proteases. Biochimie 2023; 204:140-153. [PMID: 36210615 DOI: 10.1016/j.biochi.2022.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/31/2022] [Accepted: 09/14/2022] [Indexed: 01/12/2023]
Abstract
Structural variability is a feature of snake venom proteins, and glycosylation is a post-translational modification that contributes to the diversification of venom proteomes. Studies by our group have shown that Bothrops venoms are distinctly defined by their glycoprotein content, and that most hybrid/complex N-glycans identified in these venoms contain sialic acid. Considering that metalloproteases and serine proteases are abundant components of Bothrops venoms and essential in the envenomation process, and that these enzymes contain several glycosylation sites, the role of sialic acid in venom proteolytic activity was evaluated. Here we show that removal of sialic acid by treatment of nine Bothrops venoms with neuraminidase (i) altered the pattern of gelatinolysis in zymography of most venoms and reduced the gelatinolytic activity of all venoms, (ii) decreased the proteolytic activity of some venoms on fibrinogen and the clotting activity of human plasma of all venoms, and (iii) altered the proteolysis profile of plasma proteins by B. jararaca venom, suggesting that sialic acid may play a role in the interaction of proteases with their protein substrates. In contrast, the profile of venom amidolytic activity on Bz-Arg-pNA did not change after removal of sialic acid, indicating that this monosaccharide is not essential in N-glycans of serine proteases acting on small substrates. In summary, these results expand the knowledge about the variability of the subproteomes of Bothrops venom proteases, and for the first time point to the importance of carbohydrate chains containing sialic acid in the enzymatic activities of venom proteases relevant in human envenomation.
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Li T, Peng J, Li Q, Shu Y, Zhu P, Hao L. The Mechanism and Role of ADAMTS Protein Family in Osteoarthritis. Biomolecules 2022; 12:biom12070959. [PMID: 35883515 PMCID: PMC9313267 DOI: 10.3390/biom12070959] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/01/2022] [Accepted: 07/05/2022] [Indexed: 01/27/2023] Open
Abstract
Osteoarthritis (OA) is a principal cause of aches and disability worldwide. It is characterized by the inflammation of the bone leading to degeneration and loss of cartilage function. Factors, including diet, age, and obesity, impact and/or lead to osteoarthritis. In the past few years, OA has received considerable scholarly attention owing to its increasing prevalence, resulting in a cumbersome burden. At present, most of the interventions only relieve short-term symptoms, and some treatments and drugs can aggravate the disease in the long run. There is a pressing need to address the safety problems due to osteoarthritis. A disintegrin-like and metalloprotease domain with thrombospondin type 1 repeats (ADAMTS) metalloproteinase is a kind of secretory zinc endopeptidase, comprising 19 kinds of zinc endopeptidases. ADAMTS has been implicated in several human diseases, including OA. For example, aggrecanases, ADAMTS-4 and ADAMTS-5, participate in the cleavage of aggrecan in the extracellular matrix (ECM); ADAMTS-7 and ADAMTS-12 participate in the fission of Cartilage Oligomeric Matrix Protein (COMP) into COMP lyase, and ADAMTS-2, ADAMTS-3, and ADAMTS-14 promote the formation of collagen fibers. In this article, we principally review the role of ADAMTS metalloproteinases in osteoarthritis. From three different dimensions, we explain how ADAMTS participates in all the following aspects of osteoarthritis: ECM, cartilage degeneration, and synovial inflammation. Thus, ADAMTS may be a potential therapeutic target in osteoarthritis, and this article may render a theoretical basis for the study of new therapeutic methods for osteoarthritis.
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Affiliation(s)
- Ting Li
- Department of Orthopedics, Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang 330000, China; (T.L.); (J.P.); (Q.L.); (Y.S.); (P.Z.)
- Second Clinical Medical College, Nanchang University, Nanchang 330000, China
| | - Jie Peng
- Department of Orthopedics, Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang 330000, China; (T.L.); (J.P.); (Q.L.); (Y.S.); (P.Z.)
- Second Clinical Medical College, Nanchang University, Nanchang 330000, China
| | - Qingqing Li
- Department of Orthopedics, Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang 330000, China; (T.L.); (J.P.); (Q.L.); (Y.S.); (P.Z.)
- Second Clinical Medical College, Nanchang University, Nanchang 330000, China
| | - Yuan Shu
- Department of Orthopedics, Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang 330000, China; (T.L.); (J.P.); (Q.L.); (Y.S.); (P.Z.)
- Second Clinical Medical College, Nanchang University, Nanchang 330000, China
| | - Peijun Zhu
- Department of Orthopedics, Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang 330000, China; (T.L.); (J.P.); (Q.L.); (Y.S.); (P.Z.)
- Second Clinical Medical College, Nanchang University, Nanchang 330000, China
| | - Liang Hao
- Department of Orthopedics, Second Affiliated Hospital of Nanchang University, 1 Minde Road, Nanchang 330000, China; (T.L.); (J.P.); (Q.L.); (Y.S.); (P.Z.)
- Correspondence: ; Tel.: +86-13607008562; Fax: +86-86415785
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Laghmouchi A, Graça NAG, Voorberg J. Emerging Concepts in Immune Thrombotic Thrombocytopenic Purpura. Front Immunol 2021; 12:757192. [PMID: 34858410 PMCID: PMC8631936 DOI: 10.3389/fimmu.2021.757192] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/27/2021] [Indexed: 12/23/2022] Open
Abstract
Immune thrombotic thrombocytopenic purpura (iTTP) is an autoimmune disorder of which the etiology is not fully understood. Autoantibodies targeting ADAMTS13 in iTTP patients have extensively been studied, the immunological mechanisms leading to the breach of tolerance remain to be uncovered. This review addresses the current knowledge on genetic factors associated with the development of iTTP and the interplay between the patient’s immune system and environmental factors in the induction of autoimmunity against ADAMTS13. HLA-DRB1*11 has been identified as a risk factor for iTTP in the Caucasian population. Interestingly, HLA-DRB1*08:03 was recently identified as a risk factor in the Japanese population. Combined in vitro and in silico MHC class II peptide presentation approaches suggest that an ADAMTS13-derived peptide may bind to both HLA-DRB1*11 and HLA-DRB1*08:03 through different anchor-residues. It is apparent that iTTP is associated with the presence of infectious microorganisms, viruses being the most widely associated with development of iTTP. Infections may potentially lead to loss of tolerance resulting in the shift from immune homeostasis to autoimmunity. In the model we propose in this review, infections disrupt the epithelial barriers in the gut or lung, promoting exposure of antigen presenting cells in the mucosa-associated lymphoid tissue to the microorganisms. This may result in breach of tolerance through the presentation of microorganism-derived peptides that are homologous to ADAMTS13 on risk alleles for iTTP.
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Affiliation(s)
- Aicha Laghmouchi
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, Netherlands
| | - Nuno A G Graça
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, Netherlands
| | - Jan Voorberg
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, Netherlands
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Ercig B, Arfman T, Hrdinova J, Wichapong K, Reutelingsperger CPM, Vanhoorelbeke K, Nicolaes GAF, Voorberg J. Conformational plasticity of ADAMTS13 in hemostasis and autoimmunity. J Biol Chem 2021; 297:101132. [PMID: 34461090 PMCID: PMC8449270 DOI: 10.1016/j.jbc.2021.101132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 08/24/2021] [Accepted: 08/26/2021] [Indexed: 11/08/2022] Open
Abstract
A disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13 (ADAMTS13) is a multidomain metalloprotease for which until now only a single substrate has been identified. ADAMTS13 cleaves the polymeric force-sensor von Willebrand factor (VWF) that unfolds under shear stress and recruits platelets to sites of vascular injury. Shear force–dependent cleavage at a single Tyr–Met peptide bond in the unfolded VWF A2 domain serves to reduce the size of VWF polymers in circulation. In patients with immune-mediated thrombotic thrombocytopenic purpura (iTTP), a rare life-threatening disease, ADAMTS13 is targeted by autoantibodies that inhibit its activity or promote its clearance. In the absence of ADAMTS13, VWF polymers are not adequately processed, resulting in spontaneous adhesion of blood platelets, which presents as severe, life-threatening microvascular thrombosis. In healthy individuals, ADAMTS13–VWF interactions are guided by controlled conversion of ADAMTS13 from a closed, inactive to an open, active conformation through a series of interdomain contacts that are now beginning to be defined. Recently, it has been shown that ADAMTS13 adopts an open conformation in the acute phase and during subclinical disease in iTTP patients, making open ADAMTS13 a novel biomarker for iTTP. In this review, we summarize our current knowledge on ADAMTS13 conformation and speculate on potential triggers inducing conformational changes of ADAMTS13 and how these relate to the pathogenesis of iTTP.
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Affiliation(s)
- Bogac Ercig
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, the Netherlands; Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Tom Arfman
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, the Netherlands
| | - Johana Hrdinova
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, the Netherlands; Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Kanin Wichapong
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Chris P M Reutelingsperger
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Gerry A F Nicolaes
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Jan Voorberg
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, the Netherlands; Department of Experimental Vascular Medicine, Amsterdam UMC, Amsterdam, the Netherlands.
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Kim HJ, Xu Y, Petri A, Vanhoorelbeke K, Crawley JTB, Emsley J. Crystal structure of ADAMTS13 CUB domains reveals their role in global latency. SCIENCE ADVANCES 2021; 7:7/16/eabg4403. [PMID: 33863735 PMCID: PMC8051872 DOI: 10.1126/sciadv.abg4403] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
ADAMTS13 is a plasma metalloprotease that is essential for the regulation of von Willebrand factor (VWF) function, mediator of platelet recruitment to sites of blood vessel damage. ADAMTS13 function is dynamically regulated by structural changes induced by VWF binding that convert it from a latent to active conformation. ADAMTS13 global latency is manifest by the interaction of its C-terminal CUB1-2 domains with its central Spacer domain. We resolved the crystal structure of the ADAMTS13 CUB1-2 domains revealing a previously unreported configuration for the tandem CUB domains. Docking simulations between the CUB1-2 domains with the Spacer domain in combination with enzyme kinetic functional characterization of ADAMTS13 CUB domain mutants enabled the mapping of the CUB1-2 domain site that binds the Spacer domain. Together, these data reveal the molecular basis of the ADAMTS13 Spacer-CUB interaction and the control of ADAMTS13 global latency.
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Affiliation(s)
- H J Kim
- Centre for Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Y Xu
- Department of Immunology and Inflammation, Imperial College London, London, UK
| | - A Petri
- Department of Immunology and Inflammation, Imperial College London, London, UK
| | - K Vanhoorelbeke
- Laboratory for Thrombosis Research, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - J T B Crawley
- Department of Immunology and Inflammation, Imperial College London, London, UK.
| | - J Emsley
- Centre for Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham, UK.
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Stubbs MJ, Coppo P, Cheshire C, Veyradier A, Dufek S, Levine AP, Thomas M, Patel V, Connolly JO, Hubank M, Benhamou Y, Galicier L, Poullin P, Kleta R, Gale DP, Stanescu H, Scully MA. Identification of a novel genetic locus associated with immune mediated thrombotic thrombocytopenic purpura. Haematologica 2021; 107:574-582. [PMID: 33596643 PMCID: PMC8883548 DOI: 10.3324/haematol.2020.274639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Indexed: 12/05/2022] Open
Abstract
Immune thrombotic thrombocytopenic purpura (iTTP) is an ultra-rare, life-threatening disorder, mediated through severe ADAMTS13 deficiency causing multi-system micro-thrombi formation, and has specific human leukocyte antigen associations. We undertook a large genome-wide association study to investigate additional genetically distinct associations in iTTP. We compared two iTTP patient cohorts with controls, following standardized genome-wide quality control procedures for single-nucleotide polymorphisms and imputed HLA types. Associations were functionally investigated using expression quantitative trait loci (eQTL), and motif binding prediction software. Independent associations consistent with previous findings in iTTP were detected at the HLA locus and in addition a novel association was detected on chromosome 3 (rs9884090, P=5.22x10-10, odds ratio 0.40) in the UK discovery cohort. Meta-analysis, including the French replication cohort, strengthened the associations. The haploblock containing rs9884090 is associated with reduced protein O-glycosyltransferase 1 (POGLUT1) expression (eQTL P<0.05), and functional annotation suggested a potential causative variant (rs71767581). This work implicates POGLUT1 in iTTP pathophysiology and suggests altered post-translational modification of its targets may influence disease susceptibility.
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Affiliation(s)
- Matthew J Stubbs
- Haemostasis Research Unit, UCL (London, UK); Department of Renal Medicine.
| | - Paul Coppo
- Centre de Référence des Microangiopathies Thrombotiques, Hôpital Saint-Antoine (Paris, France)
| | | | - Agnès Veyradier
- Department d'Hematologie, Centre de Référence des Microangiopathies Thrombotiques, Hôpital Lariboisière (Paris, France)
| | | | | | - Mari Thomas
- Haemostasis Research Unit, UCL (London, UK); National Institute for Health Research Cardiometabolic Programme, UCLH/UCL Cardiovascular BRC (London, UK)
| | | | | | | | - Ygal Benhamou
- Centre de Référence des Microangiopathies Thrombotiques, Hôpital Saint-Antoine (Paris, France)
| | - Lionel Galicier
- Centre de Référence des Microangiopathies Thrombotiques, Hôpital Saint-Antoine (Paris, France)
| | - Pascale Poullin
- Centre de Référence des Microangiopathies Thrombotiques, Hôpital Saint-Antoine (Paris, France)
| | | | | | | | - Marie A Scully
- Haemostasis Research Unit, UCL (London, UK); National Institute for Health Research Cardiometabolic Programme, UCLH/UCL Cardiovascular BRC (London, UK)
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Basu MK, Massicano F, Yu L, Halkidis K, Pillai V, Cao W, Zheng L, Zheng XL. Exome Sequencing Identifies Abnormalities in Glycosylation and ANKRD36C in Patients with Immune-Mediated Thrombotic Thrombocytopenic Purpura. Thromb Haemost 2020; 121:506-517. [PMID: 33184803 DOI: 10.1055/s-0040-1719030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is a potentially fatal blood disorder, resulting from autoantibodies against ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13). However, the mechanism underlying anti-ADAMTS13 autoantibody formation is not known, nor it is known how genetic aberrations contribute to the pathogenesis of iTTP. METHODS Here we performed whole exome sequencing (WES) of DNA samples from 40 adult patients with iTTP and 15 local healthy subjects with no history of iTTP and other hematological disorders. RESULTS WES revealed variations in the genes involved in protein glycosylation, including O-linked glycosylation, to be a major pathway affected in patients with iTTP. Moreover, variations in the ANKRD gene family, particularly ANKRD36C and its paralogs, were also more prevalent in patients with iTTP than in the healthy controls. The ANKRD36 family of proteins have been implicated in inflammation. Mass spectrometry revealed a dramatic alternation in plasma glycoprotein profile in patients with iTTP compared with the healthy controls. CONCLUSION Altered glycosylation may affect the disease onset and progression in various ways: it may predispose patients to produce ADAMTS13 autoantibodies or affect their binding properties; it may also alter clearance kinetics of hemostatic and inflammatory proteins. Together, our findings provide novel insights into plausible mechanisms underlying the pathogenesis of iTTP.
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Affiliation(s)
- Malay Kumar Basu
- Division of Genomic Diagnostics and Bioinformatics, Department of Pathology, The University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Felipe Massicano
- Division of Genomic Diagnostics and Bioinformatics, Department of Pathology, The University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Lijia Yu
- Division of Genomic Diagnostics and Bioinformatics, Department of Pathology, The University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Konstantine Halkidis
- Division of Hematology/Oncology, Department of Medicine, The University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Vikram Pillai
- Department of Pathology & Laboratory Medicine, The University of Kansas Medical Center, Kansas City, Kansas, United States
| | - Wenjing Cao
- Department of Pathology & Laboratory Medicine, The University of Kansas Medical Center, Kansas City, Kansas, United States
| | - Liang Zheng
- Department of Pathology & Laboratory Medicine, The University of Kansas Medical Center, Kansas City, Kansas, United States
| | - X Long Zheng
- Department of Pathology & Laboratory Medicine, The University of Kansas Medical Center, Kansas City, Kansas, United States
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Campos RK, Wijeratne HRS, Shah P, Garcia-Blanco MA, Bradrick SS. Ribosomal stalk proteins RPLP1 and RPLP2 promote biogenesis of flaviviral and cellular multi-pass transmembrane proteins. Nucleic Acids Res 2020; 48:9872-9885. [PMID: 32890404 PMCID: PMC7515724 DOI: 10.1093/nar/gkaa717] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/05/2020] [Accepted: 08/31/2020] [Indexed: 12/14/2022] Open
Abstract
The ribosomal stalk proteins, RPLP1 and RPLP2 (RPLP1/2), which form the ancient ribosomal stalk, were discovered decades ago but their functions remain mysterious. We had previously shown that RPLP1/2 are exquisitely required for replication of dengue virus (DENV) and other mosquito-borne flaviviruses. Here, we show that RPLP1/2 function to relieve ribosome pausing within the DENV envelope coding sequence, leading to enhanced protein stability. We evaluated viral and cellular translation in RPLP1/2-depleted cells using ribosome profiling and found that ribosomes pause in the sequence coding for the N-terminus of the envelope protein, immediately downstream of sequences encoding two adjacent transmembrane domains (TMDs). We also find that RPLP1/2 depletion impacts a ribosome density for a small subset of cellular mRNAs. Importantly, the polarity of ribosomes on mRNAs encoding multiple TMDs was disproportionately affected by RPLP1/2 knockdown, implying a role for RPLP1/2 in multi-pass transmembrane protein biogenesis. These analyses of viral and host RNAs converge to implicate RPLP1/2 as functionally important for ribosomes to elongate through ORFs encoding multiple TMDs. We suggest that the effect of RPLP1/2 at TMD associated pauses is mediated by improving the efficiency of co-translational folding and subsequent protein stability.
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Affiliation(s)
- Rafael K Campos
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA.,Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA
| | | | - Premal Shah
- Department of Genetics, Rutgers University, NJ, USA
| | - Mariano A Garcia-Blanco
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA.,Programme of Emerging Infectious Diseases, Duke-NUS Medical School, Singapore
| | - Shelton S Bradrick
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA
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Insights into ADAMTS13 structure: impact on thrombotic thrombocytopenic purpura diagnosis and management. Curr Opin Hematol 2020; 27:320-326. [DOI: 10.1097/moh.0000000000000602] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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