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Boucherat O, Yokokawa T, Krishna V, Kalyana-Sundaram S, Martineau S, Breuils-Bonnet S, Azhar N, Bonilla F, Gutstein D, Potus F, Lawrie A, Jeyaseelan J, Provencher S, Bonnet S. Identification of LTBP-2 as a plasma biomarker for right ventricular dysfunction in human pulmonary arterial hypertension. NATURE CARDIOVASCULAR RESEARCH 2022; 1:748-760. [PMID: 39196085 DOI: 10.1038/s44161-022-00113-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 07/07/2022] [Indexed: 08/29/2024]
Abstract
Although right ventricular (RV) function is the primary determinant of morbidity and mortality in pulmonary arterial hypertension (PAH), the molecular mechanisms of RV remodeling and the circulating factors reflecting its function remain largely elusive. In this context, the identification of new molecular players implicated in maladaptive RV remodeling along with the optimization of risk stratification approaches in PAH are key priorities. Through combination of transcriptomic and proteomic profiling of RV tissues with plasma proteome profiling, we identified a panel of proteins, mainly related to cardiac fibrosis, similarly upregulated in the RV and plasma of patients with PAH with decompensated RV. Among these, we demonstrated that plasma latent transforming growth factor beta binding protein 2 (LTBP-2) level correlates with RV function in human PAH and adds incremental value to current risk stratification models to predict long-term survival in two independent PAH cohorts.
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Affiliation(s)
- Olivier Boucherat
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada
- Department of Medicine, Université Laval, Québec City, Québec, Canada
| | - Tetsuro Yokokawa
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada
| | - Vinod Krishna
- Janssen Research & Development, Spring House, PA, USA
| | | | - Sandra Martineau
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada
| | - Sandra Breuils-Bonnet
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada
| | - Nabil Azhar
- Janssen Research & Development, Spring House, PA, USA
| | - Fany Bonilla
- Janssen Research & Development, Spring House, PA, USA
| | | | - François Potus
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada
| | - Allan Lawrie
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK & Insigneo institute for in silico medicine, Sheffield, UK
| | | | - Steeve Provencher
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada
- Department of Medicine, Université Laval, Québec City, Québec, Canada
| | - Sebastien Bonnet
- Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec City, Québec, Canada.
- Department of Medicine, Université Laval, Québec City, Québec, Canada.
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Kodama T, Okada M, Yamawaki H. Eukaryotic elongation factor 2 kinase inhibitor, A484954 potentiates β-adrenergic receptor agonist-induced acute decrease in diastolic blood pressure in rats. J Vet Med Sci 2019; 81:1509-1514. [PMID: 31484844 PMCID: PMC6863711 DOI: 10.1292/jvms.19-0425] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Eukaryotic elongation factor 2 (eEF2) kinase (eEF2K) acts to inhibit protein translation
through phosphorylating a specific substrate, eEF2. We previously found that the increased
eEF2K expression in mesenteric artery mediates hypertension development in spontaneously
hypertensive rats. More recently, we have revealed that a selective eEF2K inhibitor,
A484954 induced vasorelaxation via opening inward rectifier K+ channel and
activating β2-adrenergic receptor in smooth muscle of rat isolated mesenteric
artery, which contributes to prevent noradrenaline-induced acute increase in blood
pressure (BP). In this study, we further explored acute effects of A484954 on BP in rats,
especially focusing the action on β-adrenergic receptor. We also examined whether A484954
affects contraction and heart rate (HR) of isolated heart. BP and HR were measured by a
carotid cannulation method in rats. Isometric contraction and HR in rat isolated atria
were also measured pharmacologically. A484954 potentiated adrenaline-induced decrease in
diastolic BP (DBP) but not increase in systolic BP (SBP). A484954 potentiated
isoproterenol-induced decrease in DBP but not SBP. Contrastingly, A484954 prevented a
non-β-adrenergic receptor agonist, angiotensin II-induced increase in both SBP and DBP. In
isolated left atria, A484954 caused contraction, which was prevented by a β-adrenergic
receptor antagonist, propranolol. In isolated right atria, A484954 increased HR. In
conclusion, we for the first time demonstrated that A484954 potentiates β-adrenergic
receptor agonist-induced decrease in DBP possibly through vasorelaxation mediated via
activating β2-adrenergic receptor. It was also demonstrated that A484954 causes
contraction of rat isolated heart via activating β1-adrenergic receptor.
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Affiliation(s)
- Tomoko Kodama
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Higashi 23 bancho 35-1, Towada, Aomori 034-8628, Japan
| | - Muneyoshi Okada
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Higashi 23 bancho 35-1, Towada, Aomori 034-8628, Japan
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Higashi 23 bancho 35-1, Towada, Aomori 034-8628, Japan
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Okada M, Imoto K, Sugiyama A, Yasuda J, Yamawaki H. New Insights into the Role of Basement Membrane-Derived Matricryptins in the Heart. Biol Pharm Bull 2018; 40:2050-2060. [PMID: 29199230 DOI: 10.1248/bpb.b17-00308] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The extracellular matrix (ECM), which contributes to structural homeostasis as well as to the regulation of cellular function, is enzymatically cleaved by proteases, such as matrix metalloproteinases and cathepsins, in the normal and diseased heart. During the past two decades, matricryptins have been defined as fragments of ECM with a biologically active cryptic site, namely the 'matricryptic site,' and their biological activities have been initially identified and clarified, including anti-angiogenic and anti-tumor effects. Thus, matricryptins are expected to be novel anti-tumor drugs, and thus widely investigated. Although there are a smaller number of studies on the expression and function of matricryptins in fields other than cancer research, some matricryptins have been recently clarified to have biological functions beyond an anti-angiogenic effect in heart. This review particularly focuses on the expression and function of basement membrane-derived matricryptins, including arresten, canstatin, tumstatin, endostatin and endorepellin, during cardiac diseases leading to heart failure such as cardiac hypertrophy and myocardial infarction.
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Affiliation(s)
- Muneyoshi Okada
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Keisuke Imoto
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Akira Sugiyama
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Jumpei Yasuda
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University
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Imoto K, Hirakawa M, Okada M, Yamawaki H. Canstatin modulates L-type calcium channel activity in rat ventricular cardiomyocytes. Biochem Biophys Res Commun 2018; 499:954-959. [PMID: 29626474 DOI: 10.1016/j.bbrc.2018.04.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 04/03/2018] [Indexed: 12/24/2022]
Abstract
Excessive increase of cytosolic Ca2+ through the activation of L-type Ca2+ channels (LTCCs) via β adrenergic receptor induces apoptosis of cardiomyocytes. Canstatin, a cleaved fragment of collagen type IV α2 chain, is abundantly expressed in normal heart tissue. We previously reported that canstatin inhibits β adrenergic receptor-stimulated apoptosis in cardiomyoblasts. Here, we tested the hypothesis that canstatin regulates LTCCs activity in ventricular cardiomyocytes. Collagen type IV α2 chain (COL4A2) small interfering (si) RNA (for canstatin suppression) or control siRNA was injected via jugular vein in Wistar rats. Two days after the injection, electrocardiogram (ECG) was recorded and the left ventricular tissue was isolated using Langendorff apparatus. Immunofluorescence staining was performed to clarify the distribution of canstatin in cardiomyocytes. The knockdown efficiency was confirmed by Western blotting. The L-type Ca2+ channel current (ICaL) of ventricular cardiomyocyte was measured by a whole-cell patch clamp technique. In immunofluorescence staining, colocalization of canstatin and αv integrin was observed in the isolated ventricular cardiomyocytes. The ICaL of ventricular cardiomyocyte isolated from COL4A2 siRNA-injected rats was significantly enhanced compared with control siRNA-injected rats. Recombinant canstatin (250 ng/ml) significantly reversed it. ECG analysis showed that QT interval tended to be shortened and amplitude of T wave was significantly increased in the COL4A2 siRNA-injected rats. In summary, we for the first time clarified that suppressing canstatin expression increases the basal ICaL in ventricular cardiomyocytes. It is proposed that canstatin might play a role in the stabilization of cardiac function through the modulation of LTCC activity in cardiomyocytes.
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Affiliation(s)
- Keisuke Imoto
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Japan
| | - Masaki Hirakawa
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Japan
| | - Muneyoshi Okada
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Japan.
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Japan
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Canstatin inhibits isoproterenol-induced apoptosis through preserving mitochondrial morphology in differentiated H9c2 cardiomyoblasts. Apoptosis 2018; 21:887-95. [PMID: 27315818 DOI: 10.1007/s10495-016-1262-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Canstatin, a non-collagenous fragment, is cleaved from type IV collagen α2 chain, an essential component of basement membrane surrounding cardiomyocytes. Although canstatin is known as an endogenous anti-angiogenic factor, its effects on cardiomyocytes have not been clarified. This study examined the effects of canstatin on isoproterenol-induced apoptosis in differentiated H9c2 cardiomyoblasts. Retinoic acid was used to differentiate H9c2 myoblast to cardiomyocyte-like phenotype. Cell viability was determined by a cell counting assay. Western blotting was performed to detect expression of cleaved casepase-3 and phosphorylation of dynamin related protein (Drp)1 at Ser637 which regulates mitochondrial fission. Mito Sox Red staining was performed to examine a mitochondria-dependent production of reactive oxygen species (ROS). Mitochondrial morphology was detected by Mito Tracker Red staining. Isoproterenol (100 μM, 48 h) significantly decreased cell viability and increased cleaved caspase-3 expression, which were inhibited by canstatin (10-250 ng/ml) in a concentration-dependent manner. Canstatin suppressed the isoproterenol-induced mitochondrial fission but not ROS. Canstatin also inhibited the isoproterenol-induced dephosphorylation of Drp1 at Ser637. In conclusion, canstatin inhibits isoproterenol-induced apoptosis through the inhibition of mitochondrial fission via the suppression of dephosphorylation of Drp1 at Ser637 in differentiated H9c2 cardiomyoblasts.
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Abstract
Collagens mediate essential hemostasis by maintaining the integrity and stability of the vascular wall. Imbalanced turnover of collagens by uncontrolled formation and/or degradation may result in pathologic conditions such as fibrosis. Thickening of the vessel wall because of accumulation of collagens may lead to arterial occlusion or thrombosis. Thinning of the wall because of collagen degradation or deficiency may lead to rupture of the vessel wall or aneurysm. Preventing excessive hemorrhage or thrombosis relies on collagen-mediated actions. Von Willebrand factor, integrins and glycoprotein VI, as well as clotting factors, can bind collagen to restore normal hemostasis after trauma. This review outlines the essential roles of collagens in mediating hemostasis, with a focus on collagens types I, III, IV, VI, XV, and XVIII.
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Affiliation(s)
| | - N G Kjeld
- Nordic Bioscience A/S, Herlev, Denmark
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