LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 117

Search options

  1. Article ; Online: Arterial Stiffness: From Basic Primers to Integrative Physiology.

    Regnault, Véronique / Lacolley, Patrick / Laurent, Stéphane

    Annual review of physiology

    2023  Volume 86, Page(s) 99–121

    Abstract: The elastic properties of conductance arteries are one of the most important hemodynamic functions in the body, and data continue to emerge regarding the importance of their dysfunction in vascular aging and a range of cardiovascular diseases. Here, we ... ...

    Abstract The elastic properties of conductance arteries are one of the most important hemodynamic functions in the body, and data continue to emerge regarding the importance of their dysfunction in vascular aging and a range of cardiovascular diseases. Here, we provide new insight into the integrative physiology of arterial stiffening and its clinical consequence. We also comprehensively review progress made on pathways/molecules that appear today as important basic determinants of arterial stiffness, particularly those mediating the vascular smooth muscle cell (VSMC) contractility, plasticity and stiffness. We focus on membrane and nuclear mechanotransduction, clearance function of the vascular wall, phenotypic switching of VSMCs, immunoinflammatory stimuli and epigenetic mechanisms. Finally, we discuss the most important advances of the latest clinical studies that revisit the classical therapeutic concepts of arterial stiffness and lead to a patient-by-patient strategy according to cardiovascular risk exposure and underlying disease.
    MeSH term(s) Humans ; Vascular Stiffness ; Mechanotransduction, Cellular ; Arteries/metabolism ; Cardiovascular Diseases/metabolism ; Aging/metabolism
    Language English
    Publishing date 2023-01-20
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 207933-1
    ISSN 1545-1585 ; 0066-4278
    ISSN (online) 1545-1585
    ISSN 0066-4278
    DOI 10.1146/annurev-physiol-042022-031925
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Smooth Muscle Cell Molecular Underpinnings of Vascular Ageing.

    Regnault, Veronique / Raoul, Alexandre / Schellenberg, Celia / Lacolley, Patrick

    Heart, lung & circulation

    2021  Volume 30, Issue 11, Page(s) 1595–1598

    MeSH term(s) Muscle, Smooth, Vascular ; Myocytes, Smooth Muscle ; Vascular Stiffness
    Language English
    Publishing date 2021-10-01
    Publishing country Australia
    Document type Editorial
    ZDB-ID 2020980-0
    ISSN 1444-2892 ; 1443-9506
    ISSN (online) 1444-2892
    ISSN 1443-9506
    DOI 10.1016/j.hlc.2021.09.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Conductance Artery Wall Layers and Their Respective Roles in the Clearance Functions.

    Michel, Jean-Baptiste / Lagrange, Jeremy / Regnault, Veronique / Lacolley, Patrick

    Arteriosclerosis, thrombosis, and vascular biology

    2022  Volume 42, Issue 9, Page(s) e253–e272

    Abstract: Evolutionary organization of the arterial wall into layers occurred concomitantly with the emergence of a highly muscularized, pressurized arterial system that facilitates outward hydraulic conductance and mass transport of soluble substances across the ... ...

    Abstract Evolutionary organization of the arterial wall into layers occurred concomitantly with the emergence of a highly muscularized, pressurized arterial system that facilitates outward hydraulic conductance and mass transport of soluble substances across the arterial wall. Although colliding circulating cells disperse potential energy within the arterial wall, the different layers counteract this effect: (1) the endothelium ensures a partial barrier function; (2) the media comprises smooth muscle cells capable of endocytosis/phagocytosis; (3) the outer adventitia and perivascular adipocytic tissue are the final receptacles of convected substances. While the endothelium forms a physical and a biochemical barrier, the medial layer is avascular, relying on the specific permeability properties of the endothelium for metabolic support. Different components of the media interact with convected molecules: medial smooth muscle cells take up numerous molecules via scavenger receptors and are capable of phagocytosis of macro/micro particles. The outer layers-the highly microvascularized innervated adventitia and perivascular adipose tissue-are also involved in the clearance functions of the media: the adventitia is the seat of immune response development, inward angiogenesis, macromolecular lymphatic drainage, and neuronal stimulation. Consequently, the clearance functions of the arterial wall are physiologically essential, but also may favor the development of arterial wall pathologies. This review describes how the walls of large conductance arteries have acquired physiological clearance functions, how this is determined by the attributes of the endothelial barrier, governed by endocytic and phagocytic capacities of smooth muscle cells, impacting adventitial functions, and the role of these clearance functions in arterial wall diseases.
    MeSH term(s) Adipose Tissue ; Adventitia/pathology ; Arteries/pathology ; Humans ; Myocytes, Smooth Muscle/pathology ; Vascular Diseases/pathology
    Language English
    Publishing date 2022-08-04
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 1221433-4
    ISSN 1524-4636 ; 1079-5642
    ISSN (online) 1524-4636
    ISSN 1079-5642
    DOI 10.1161/ATVBAHA.122.317759
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Alpha-2-macroglobulin in hemostasis and thrombosis: An underestimated old double-edged sword.

    Lagrange, Jeremy / Lecompte, Thomas / Knopp, Tanja / Lacolley, Patrick / Regnault, Véronique

    Journal of thrombosis and haemostasis : JTH

    2022  Volume 20, Issue 4, Page(s) 806–815

    Abstract: Antiproteinases such as alpha-2-macroglobulin (A2M) play a role in hemostasis. A2M is highly conserved throughout evolution and is a high molecular weight homo-tetrameric glycoprotein. A2M proteinase inhibitor activity is possible via a unique cage ... ...

    Abstract Antiproteinases such as alpha-2-macroglobulin (A2M) play a role in hemostasis. A2M is highly conserved throughout evolution and is a high molecular weight homo-tetrameric glycoprotein. A2M proteinase inhibitor activity is possible via a unique cage structure leading to proteinase entrapment without direct enzymatic activity inhibition. Following this entrapment, proteinase clearance is possible through A2M binding to the low-density lipoprotein receptor-related protein 1. A2M synthesis is regulated by pro-inflammatory cytokines and increases during several chronic or acute inflammatory diseases and varies with age. For instance, A2M plasma levels are known to be increased in patients with diabetes mellitus, nephrotic syndrome, or sepsis. Concerning hemostasis, A2M can trap many proteinases involved in coagulation and fibrinolysis. Because of its pleiotropic effects A2M can be seen as both anti- and pro-hemostatic. A2M can inhibit thrombin, factor Xa, activated protein C, plasmin, tissue-plasminogen activator, and urokinase. Through its many different functions A2M is generally put apart in the balanced regulation of hemostasis. In addition, the fact that A2M plasma levels are differently regulated during inflammatory-related diseases and that A2M can neutralize cytokines that also modify hemostasis could explain why it is difficult to link common proteins and parameters of hemostasis with the mechanisms of thrombosis in such diseases. Thus, we propose in the present review to summarize known functions of A2M, give a brief overview about diseases, and then to focus on the roles of this antiproteinase in hemostasis and thrombosis.
    MeSH term(s) Cytokines ; Female ; Hemostasis ; Humans ; Pregnancy ; Pregnancy-Associated alpha 2-Macroglobulins ; Thrombin ; Thrombosis ; Transcription Factors ; alpha-Macroglobulins/metabolism
    Chemical Substances Cytokines ; Pregnancy-Associated alpha 2-Macroglobulins ; Transcription Factors ; alpha-Macroglobulins ; Thrombin (EC 3.4.21.5)
    Language English
    Publishing date 2022-01-30
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2112661-6
    ISSN 1538-7836 ; 1538-7933
    ISSN (online) 1538-7836
    ISSN 1538-7933
    DOI 10.1111/jth.15647
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Mechanisms of Arterial Stiffening: From Mechanotransduction to Epigenetics.

    Lacolley, Patrick / Regnault, Véronique / Laurent, Stéphane

    Arteriosclerosis, thrombosis, and vascular biology

    2020  Volume 40, Issue 5, Page(s) 1055–1062

    Abstract: Arterial stiffness is a major independent risk factor for cardiovascular complications causing isolated systolic hypertension and increased pulse pressure in the microvasculature of target organs. Stiffening of the arterial wall is determined by common ... ...

    Abstract Arterial stiffness is a major independent risk factor for cardiovascular complications causing isolated systolic hypertension and increased pulse pressure in the microvasculature of target organs. Stiffening of the arterial wall is determined by common mechanisms including reduced elastin/collagen ratio, production of elastin cross-linking, reactive oxygen species-induced inflammation, calcification, vascular smooth muscle cell stiffness, and endothelial dysfunction. This brief review will discuss current biological mechanisms by which other cardiovascular risk factors (eg, aging, hypertension, diabetes mellitus, and chronic kidney disease) cause arterial stiffness, with a particular focus on recent advances regarding nuclear mechanotransduction, mitochondrial oxidative stress, metabolism and dyslipidemia, genome mutations, and epigenetics. Targeting these different molecular pathways at different time of cardiovascular risk factor exposure may be a novel approach for discovering drugs to reduce arterial stiffening without affecting artery strength and normal remodeling.
    MeSH term(s) Animals ; Arteries/metabolism ; Arteries/physiopathology ; Cardiovascular Diseases/epidemiology ; Cardiovascular Diseases/genetics ; Cardiovascular Diseases/metabolism ; Cardiovascular Diseases/physiopathology ; Comorbidity ; Energy Metabolism ; Epigenesis, Genetic ; Humans ; Mechanotransduction, Cellular ; Oxidative Stress ; Risk Assessment ; Risk Factors ; Vascular Stiffness
    Language English
    Publishing date 2020-02-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1221433-4
    ISSN 1524-4636 ; 1079-5642
    ISSN (online) 1524-4636
    ISSN 1079-5642
    DOI 10.1161/ATVBAHA.119.313129
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Sex Differences in Arterial Stiffening and Central Pulse Pressure: Mechanistic Insights?

    Safar, Michel E / Regnault, Véronique / Lacolley, Patrick

    Journal of the American College of Cardiology

    2020  Volume 75, Issue 8, Page(s) 881–883

    MeSH term(s) Arteries ; Blood Pressure ; Female ; Humans ; Male ; Sex Characteristics ; Vascular Stiffness
    Language English
    Publishing date 2020-03-04
    Publishing country United States
    Document type Editorial ; Comment
    ZDB-ID 605507-2
    ISSN 1558-3597 ; 0735-1097
    ISSN (online) 1558-3597
    ISSN 0735-1097
    DOI 10.1016/j.jacc.2019.12.041
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Thrombin generation on vascular cells in the presence of factor VIII and/or emicizumab.

    Atsou, Sénadé / Schellenberg, Célia / Lagrange, Jeremy / Lacolley, Patrick / Lenting, Peter J / Denis, Cécile V / Christophe, Olivier D / Regnault, Véronique

    Journal of thrombosis and haemostasis : JTH

    2023  Volume 22, Issue 1, Page(s) 112–125

    Abstract: Background: The effect of factor VIII (FVIII) or emicizumab on thrombin generation is usually assessed in assays using synthetic phospholipids. Here, we assessed thrombin generation at the surface of human arterial cells (aortic endothelial cells [hAECs] ...

    Abstract Background: The effect of factor VIII (FVIII) or emicizumab on thrombin generation is usually assessed in assays using synthetic phospholipids. Here, we assessed thrombin generation at the surface of human arterial cells (aortic endothelial cells [hAECs] and aortic vascular smooth muscle cells [hVSMCs]).
    Objectives: To explore the capacity of hAECs (resting or stimulated) and hVSMCs to support thrombin generation by FVIII or emicizumab.
    Methods: Primary hVSMCs and hAECs were analyzed for tissue factor (TF)-activity and antigen, phosphatidylserine (PS)-exposure, tissue factor pathway inhibitor (TFPI)-content and thrombomodulin expression. Cells were incubated with FVIII-deficient plasma spiked with FVIII, emicizumab, activated prothrombin complex concentrate (APCC) or combinations thereof.
    Results: TF activity and PS-exposure were present on both hVSMCs and hAECs. In contrast, thrombomodulin and TFPI were expressed on hAECs, while virtually lacking on hVSMCs, confirming the procoagulant nature of hVSMCs. Tumor necrosis factor α-mediated stimulation of hAECs increased not only TF antigen, TF activity, and PS-exposure but also TFPI and thrombomodulin expression. As expected, FVIII and emicizumab promoted thrombin generation on nonstimulated hAECs and hVSMCs, with more thrombin being generated on hVSMCs. Unexpectedly, FVIII and emicizumab increased thrombin generation to a lesser extent on stimulated hAECs compared with nonstimulated hAECs. Finally, adding emicizumab to FVIII did not further increase thrombin generation, whereas the addition of emicizumab to APCC resulted in exaggerated thrombin generation.
    Conclusion: Tumor necrosis factor stimulation of hAECs increases both pro- and anticoagulant activity. Unexpectedly, the increased anticoagulant activity is sufficient to limit both FVIII- and emicizumab-induced thrombin generation. This protective effect disappears when emicizumab is combined with APCC.
    MeSH term(s) Humans ; Factor VIII/metabolism ; Thrombin/metabolism ; Thrombomodulin ; Endothelial Cells/metabolism ; Hemostatics ; Antibodies, Bispecific/pharmacology ; Factor VIIa ; Factor IX ; Anticoagulants ; Hemophilia A
    Chemical Substances Factor VIII (9001-27-8) ; Thrombin (EC 3.4.21.5) ; emicizumab (7NL2E3F6K3) ; Thrombomodulin ; Hemostatics ; Antibodies, Bispecific ; Factor VIIa (EC 3.4.21.21) ; Factor IX (9001-28-9) ; Anticoagulants
    Language English
    Publishing date 2023-09-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 2112661-6
    ISSN 1538-7836 ; 1538-7933
    ISSN (online) 1538-7836
    ISSN 1538-7933
    DOI 10.1016/j.jtha.2023.09.017
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Sirtuin 1 steers anti-inflammatory effects in vascular smooth muscle cells: protection without burden?

    Regnault, Véronique / Lacolley, Patrick

    Cardiovascular research

    2017  Volume 113, Issue 10, Page(s) 1096–1098

    MeSH term(s) Anti-Inflammatory Agents ; Cells, Cultured ; Muscle, Smooth, Vascular ; Myocytes, Smooth Muscle ; Sirtuin 1
    Chemical Substances Anti-Inflammatory Agents ; Sirtuin 1 (EC 3.5.1.-)
    Language English
    Publishing date 2017-09-12
    Publishing country England
    Document type Editorial ; Comment
    ZDB-ID 80340-6
    ISSN 1755-3245 ; 0008-6363
    ISSN (online) 1755-3245
    ISSN 0008-6363
    DOI 10.1093/cvr/cvx131
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Thrombin Generation Assay in Antiphospholipid Antibodies Positive Subjects as a Personalized Thrombotic Risk Assessment: State of the Art and Perspectives.

    Foret, Thomas / Dufrost, Virginie / Lagrange, Jeremy / Costa, Patricia / Mourey, Guillaume / Lecompte, Thomas / Magy-Bertrand, Nadine / Regnault, Veronique / Zuily, Stéphane / Wahl, Denis

    Current rheumatology reports

    2024  

    Abstract: Purpose of the review: Thrombotic risk assessment in antiphospholipid positive (aPL +) subjects is a major challenge, and the study of in vitro thrombin generation (thrombin generation assays (TGA)) could provide useful information. Activated protein C ( ...

    Abstract Purpose of the review: Thrombotic risk assessment in antiphospholipid positive (aPL +) subjects is a major challenge, and the study of in vitro thrombin generation (thrombin generation assays (TGA)) could provide useful information. Activated protein C (APC) sensitivity is involved in thrombotic events in antiphospholipid syndrome patients. We summarized methods used to assess APC sensitivity with TGA and evaluated the prognostic role of APC resistance through literature search.
    Recent findings: APC resistance induced by aPL is a complex pathway. Several cross-sectional studies assessed APC sensitivity to understand thrombotic event mechanisms in aPL + subjects. Only one prospective cohort had investigated the prognostic impact of APC resistance in aPL + subjects, with a positive and significant correlation between APC sensitivity and the risk of thrombosis during the follow up (hazard ratio, 6.07 [95% CI, 1.69-21.87]). APC resistance assessed with TGA could be associated with thrombotic events in aPL + subjects.
    Language English
    Publishing date 2024-02-19
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2057357-1
    ISSN 1534-6307 ; 1523-3774
    ISSN (online) 1534-6307
    ISSN 1523-3774
    DOI 10.1007/s11926-024-01140-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: A thrombin-driven neural net diagnoses the antiphospholipid syndrome without the need for interruption of anticoagulation.

    de Laat-Kremers, Romy M W / Wahl, Denis / Zuily, Stéphane / Ninivaggi, Marisa / Regnault, Véronique / Musial, Jacek / de Groot, Philip G / Devreese, Katrien M J / de Laat, Bas

    Blood advances

    2024  Volume 8, Issue 4, Page(s) 936–946

    Abstract: Abstract: Thrombosis is an important manifestation of the antiphospholipid syndrome (APS). The thrombin generation (TG) test is a global hemostasis assay, and increased TG is associated with thrombosis. APS is currently diagnosed based on clinical and ... ...

    Abstract Abstract: Thrombosis is an important manifestation of the antiphospholipid syndrome (APS). The thrombin generation (TG) test is a global hemostasis assay, and increased TG is associated with thrombosis. APS is currently diagnosed based on clinical and laboratory criteria, the latter defined as anti-cardiolipin, anti-β2-glycoprotein I antibodies, or lupus anticoagulant (LA). APS testing is often performed after a thrombotic episode and subsequent administration of anticoagulation, which might hamper the interpretation of clotting assays used for LA testing. We set out to develop an artificial neural network (NN) that can diagnose APS in patients who underwent vitamin K antagonist (VKA) treatment, based on TG test results. Five NNs were trained to diagnose APS in 48 VKA-treated patients with APS and 64 VKA-treated controls, using TG and thrombin dynamics parameters as inputs. The 2 best-performing NNs were selected (accuracy, 96%; sensitivity, 96%-98%; and specificity, 95%-97%) and further validated in an independent cohort of VKA-anticoagulated patients with APS (n = 33) and controls (n = 62). Independent clinical validation favored 1 of the 2 selected NNs, with a sensitivity of 88% and a specificity of 94% for the diagnosis of APS. In conclusion, the combined use of TG and NN methodology allowed for us to develop an NN that diagnoses APS with an accuracy of 92% in individuals with VKA anticoagulation (n = 95). After further clinical validation, the NN could serve as a screening and diagnostic tool for patients with thrombosis, especially because there is no need to interrupt anticoagulant therapy.
    MeSH term(s) Humans ; Antiphospholipid Syndrome/diagnosis ; Antiphospholipid Syndrome/drug therapy ; Thrombin/pharmacology ; Anticoagulants/adverse effects ; Blood Coagulation ; Lupus Coagulation Inhibitor ; Thrombosis/diagnosis ; Thrombosis/drug therapy ; Thrombosis/etiology
    Chemical Substances Thrombin (EC 3.4.21.5) ; Anticoagulants ; Lupus Coagulation Inhibitor
    Language English
    Publishing date 2024-01-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2915908-8
    ISSN 2473-9537 ; 2473-9529
    ISSN (online) 2473-9537
    ISSN 2473-9529
    DOI 10.1182/bloodadvances.2023011938
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top