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Plasma proteomic profiling in postural orthostatic tachycardia syndrome (POTS) reveals new disease pathways. Sci Rep 2022; 12:20051. [PMID: 36414707 PMCID: PMC9681882 DOI: 10.1038/s41598-022-24729-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
Postural orthostatic tachycardia syndrome (POTS) is a cardiovascular autonomic disorder characterized by excessive heart rate increase on standing, leading to debilitating symptoms with limited therapeutic possibilities. Proteomics is a large-scale study of proteins that enables a systematic unbiased view on disease and health, allowing stratification of patients based on their protein background. The aim of the present study was to determine plasma protein biomarkers of POTS and to reveal proteomic pathways differentially regulated in POTS. We performed an age- and sex-matched, case-control study in 130 individuals (case-control ratio 1:1) including POTS and healthy controls. Mean age in POTS was 30 ± 9.8 years (84.6% women) versus controls 31 ± 9.8 years (80.0% women). We analyzed plasma proteins using data-independent acquisition (DIA) mass spectrometry. Pathway analysis of significantly differently expressed proteins was executed using a cutoff log2 fold change set to 1.2 and false discovery rate (p-value) of < 0.05. A total of 393 differential plasma proteins were identified. Label-free quantification of DIA-data identified 30 differentially expressed proteins in POTS compared with healthy controls. Pathway analysis identified the strongest network interactions particularly for proteins involved in thrombogenicity and enhanced platelet activity, but also inflammation, cardiac contractility and hypertrophy, and increased adrenergic activity. Our observations generated by the first use a label-free unbiased quantification reveal the proteomic footprint of POTS in terms of a hypercoagulable state, proinflammatory state, enhanced cardiac contractility and hypertrophy, skeletal muscle expression, and adrenergic activity. These findings support the hypothesis that POTS may be an autoimmune, inflammatory and hyperadrenergic disorder.
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Fedorowski A, Ricci F, Hamrefors V, Sandau KE, Chung TH, Muldowney JAS, Gopinathannair R, Olshansky B. Orthostatic Hypotension: Management of a Complex, But Common, Medical Problem. Circ Arrhythm Electrophysiol 2022; 15:e010573. [PMID: 35212554 PMCID: PMC9049902 DOI: 10.1161/circep.121.010573] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Orthostatic hypotension (OH), a common, often overlooked, disorder with many causes, is associated with debilitating symptoms, falls, syncope, cognitive impairment, and risk of death. Chronic OH, a cardinal sign of autonomic dysfunction, increases with advancing age and is commonly associated with neurodegenerative and autoimmune diseases, diabetes, hypertension, heart failure, and kidney failure. Management typically involves a multidisciplinary, patient-centered, approach to arrive at an appropriate underlying diagnosis that is causing OH, treating accompanying conditions, and providing individually tailored pharmacological and nonpharmacological treatment. We propose a novel streamlined pathophysiological classification of OH; review the relationship between the cardiovascular disease continuum and OH; discuss OH-mediated end-organ damage; provide diagnostic and therapeutic algorithms to guide clinical decision making and patient care; identify current gaps in knowledge and try to define future research directions. Using a case-based learning approach, specific clinical scenarios are presented highlighting various presentations of OH to provide a practical guide to evaluate and manage patients who have OH.
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Affiliation(s)
- Artur Fedorowski
- Dept of Clinical Sciences, Lund University, Malmö
- Dept of Cardiology, Karolinska University Hospital, Stockholm, Sweden
| | - Fabrizio Ricci
- Dept of Clinical Sciences, Lund University, Malmö
- Dept of Neuroscience, Imaging & Clinical Sciences, “G.d’Annunzio” University, Chieti-Pescara
- Casa di Cura Villa Serena, Città Sant’Angelo, Italy
| | - Viktor Hamrefors
- Dept of Clinical Sciences, Lund University, Malmö
- Dept of Internal Medicine, Skåne University Hospital, Malmö, Sweden
| | | | - Tae Hwan Chung
- Dept of Physical Medicine & Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD
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Limper U, Ahnert T, Maegele M, Froehlich M, Grau M, Gauger P, Bauerfeind U, Görlinger K, Pötzsch B, Jordan J. Simulated Hypergravity Activates Hemostasis in Healthy Volunteers. J Am Heart Assoc 2020; 9:e016479. [PMID: 33283577 PMCID: PMC7955367 DOI: 10.1161/jaha.120.016479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background Hypergravity may promote human hemostasis thereby increasing thrombotic risk. Future touristic suborbital spaceflight will expose older individuals with chronic medical conditions, who are at much higher thromboembolic risk compared with professional astronauts, to hypergravity. Therefore, we tested the impact of hypergravity on hemostasis in healthy volunteers undergoing centrifugation. Methods and Results We studied 20 healthy seated men before and after 15 minutes under 3 Gz hypergravity on a long‐arm centrifuge. We obtained blood samples for hemostasis testing before, immediately after, and 30 minutes after centrifugation. Tests included viscoelastic thromboelastometry, platelet impedance aggregometry, endothelial activation markers, blood rheology testing, microparticle analyses, and clotting factor analysis. Exposure to hypergravity reduced plasma volume by 12.5% (P=0.002) and increased the red blood cell aggregation index (P<0.05). With hypergravity, thrombelastographic clotting time of native blood shortened from 719±117 seconds to 628±89 seconds (P=0.038) and platetet reactivity increased (P=0.045). Hypergravity shortened partial thromboplastin time from 28 (26–29) seconds to 25 (24–28) seconds (P<0.001) and increased the activity of coagulation factors (eg, factor VIII 117 [93–134] versus 151 [133–175] %, P<0.001). Tissue factor concentration was 188±95 pg/mL before and 298±136 pg/mL after hypergravity exposure (P=0.023). Antithrombin (P=0.005), thrombin‐antithrombin complex (P<0.001), plasmin‐alpha2‐antiplasmin complex (0.002), tissue‐plasminogen activatior (P<0.001), and plasminogen activator inhibitor‐1 (P=0.002) increased with centrifugation. Statistical adjustment for plasma volume attenuated changes in coagulation. Conclusions Hypergravity triggers low‐level hemostasis activation through endothelial cell activation, increased viscoelasticity, and augmented platelet reactivity, albeit partly counteracted through endogenous coagulation inhibitors release. Hemoconcentration may contribute to the response.
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Affiliation(s)
- Ulrich Limper
- Department of Anesthesiology and Intensive Care Medicine Merheim Medical Center Hospitals of Cologne University of Witten/Herdecke Cologne Germany.,German Aerospace Center (DLR)Institute of Aerospace Medicine Cologne Germany
| | - Tobias Ahnert
- Department of Orthopedic Surgery Traumatology and Sports Medicine Merheim Medical Center Hospitals of Cologne University of Witten/Herdecke Cologne Germany
| | - Marc Maegele
- Department of Orthopedic Surgery Traumatology and Sports Medicine Merheim Medical Center Hospitals of Cologne University of Witten/Herdecke Cologne Germany
| | - Matthias Froehlich
- Department of Orthopedic Surgery Traumatology and Sports Medicine Merheim Medical Center Hospitals of Cologne University of Witten/Herdecke Cologne Germany
| | - Marijke Grau
- Department of Molecular and Cellular Sports Medicine German Sport University Cologne Cologne Germany
| | - Peter Gauger
- German Aerospace Center (DLR)Institute of Aerospace Medicine Cologne Germany
| | - Ursula Bauerfeind
- Department of Haematology and Transfusion Medicine (DTM) Merheim Medical Center Hospitals of Cologne Germany
| | - Klaus Görlinger
- Department of Anesthesiology and Intensive Care Medicine University Hospital Essen Essen Germany.,Medical Director Tem Innovations Munich Germany
| | - Bernhard Pötzsch
- Institute of Experimental Haematology and Transfusion Medicine University Hospital Bonn Bonn Germany
| | - Jens Jordan
- German Aerospace Center (DLR)Institute of Aerospace Medicine Cologne Germany.,Chair of Aerospace Medicine Medical Faculty University of Cologne Germany
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Marzolini S, Robertson AD, Oh P, Goodman JM, Corbett D, Du X, MacIntosh BJ. Aerobic Training and Mobilization Early Post-stroke: Cautions and Considerations. Front Neurol 2019; 10:1187. [PMID: 31803129 PMCID: PMC6872678 DOI: 10.3389/fneur.2019.01187] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 10/25/2019] [Indexed: 12/14/2022] Open
Abstract
Knowledge gaps exist in how we implement aerobic exercise programs during the early phases post-stroke. Therefore, the objective of this review was to provide evidence-based guidelines for pre-participation screening, mobilization, and aerobic exercise training in the hyper-acute and acute phases post-stroke. In reviewing the literature to determine safe timelines of when to initiate exercise and mobilization we considered the following factors: arterial blood pressure dysregulation, cardiac complications, blood-brain barrier disruption, hemorrhagic stroke transformation, and ischemic penumbra viability. These stroke-related impairments could intensify with inappropriate mobilization/aerobic exercise, hence we deemed the integrity of cerebral autoregulation to be an essential physiological consideration to protect the brain when progressing exercise intensity. Pre-participation screening criteria are proposed and countermeasures to protect the brain from potentially adverse circulatory effects before, during, and following mobilization/exercise sessions are introduced. For example, prolonged periods of standing and static postures before and after mobilization/aerobic exercise may elicit blood pooling and/or trigger coagulation cascades and/or cerebral hypoperfusion. Countermeasures such as avoiding prolonged standing or incorporating periodic lower limb movement to activate the venous muscle pump could counteract blood pooling after an exercise session, minimize activation of the coagulation cascade, and mitigate potential cerebral hypoperfusion. We discuss patient safety in light of the complex nature of stroke presentations (i.e., type, severity, and etiology), medical history, comorbidities such as diabetes, cardiac manifestations, medications, and complications such as anemia and dehydration. The guidelines are easily incorporated into the care model, are low-risk, and use minimal resources. These and other strategies represent opportunities for improving the safety of the activity regimen offered to those in the early phases post-stroke. The timeline for initiating and progressing exercise/mobilization parameters are contingent on recovery stages both from neurobiological and cardiovascular perspectives, which to this point have not been specifically considered in practice. This review includes tailored exercise and mobilization prescription strategies and precautions that are not resource intensive and prioritize safety in stroke recovery.
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Affiliation(s)
- Susan Marzolini
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada
- Department of Exercise Sciences, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada
- Canadian Partnership for Stroke Recovery, Toronto, ON, Canada
| | - Andrew D. Robertson
- Schlegel-University of Waterloo Research Institute for Aging, University of Waterloo, Waterloo, ON, Canada
- Department of Kinesiology, University of Waterloo, Waterloo, ON, Canada
| | - Paul Oh
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada
- Department of Exercise Sciences, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada
- Canadian Partnership for Stroke Recovery, Toronto, ON, Canada
| | - Jack M. Goodman
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada
- Department of Exercise Sciences, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada
| | - Dale Corbett
- Canadian Partnership for Stroke Recovery, Toronto, ON, Canada
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Xiaowei Du
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada
- School of Kinesiology and Health Studies, Queen's University, Kingston, ON, Canada
| | - Bradley J. MacIntosh
- Canadian Partnership for Stroke Recovery, Toronto, ON, Canada
- Sunnybrook Health Sciences Center, Toronto, ON, Canada
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Quan W, Wang Y, Chen S, Du J. Orthostatic Intolerance and Coagulation Abnormalities: An Update. Neurosci Bull 2018; 35:171-177. [PMID: 30315398 DOI: 10.1007/s12264-018-0295-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 08/11/2018] [Indexed: 01/12/2023] Open
Affiliation(s)
- Wei Quan
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
- Department of Clinical Medicine, Peking University Health Science Center, Beijing, 100191, China
| | - Yuchen Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
- Department of Clinical Medicine, Peking University Health Science Center, Beijing, 100191, China
| | - Selena Chen
- Department of Biochemistry and Cellular Biology, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China.
- Key Laboratory of Molecular Cardiovascular Science of the Ministry of Education, Beijing, 100191, China.
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