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Bougaran P, Bats ML, Delobel V, Rubin S, Vaurs J, Couffinhal T, Duplàa C, Dufourcq P. ROR2 (Receptor Tyrosine Kinase-Like Orphan Receptor 2)/Planar Cell Polarity a New Pathway Controlling Endothelial Cell Polarity Under Flow Conditions. Arterioscler Thromb Vasc Biol 2023. [PMID: 37199159 DOI: 10.1161/atvbaha.123.319106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
BACKGROUND Endothelial cells (ECs) are sensitive to physical forces created by blood flow, especially to laminar shear stress. Among the cell responses to laminar flow, EC polarization against the flow direction emerges as a key event, particularly during the development and remodeling of the vascular network. EC adopt an elongated planar cell shape with an asymmetrical distribution of intracellular organelles along the axis of blood flow. This study aimed to investigate the involvement of planar cell polarity via the receptor ROR2 (receptor tyrosine kinase-like orphan receptor 2) in endothelial responses to laminar shear stress. METHODS We generated a genetic mouse model with EC-specific deletion of Ror2, in combination with in vitro approaches involving loss- and gain-of-function experiments. RESULTS During the first 2 weeks of life, the endothelium of the mouse aorta undergoes a rapid remodeling associated with a loss of EC polarization against the flow direction. Notably, we found a correlation between ROR2 expression and endothelial polarization levels. Our findings demonstrate that deletion of Ror2 in murine ECs impaired their polarization during the postnatal development of the aorta. in vitro experiments further validated the essential role of ROR2 in both EC collective polarization and directed migration under laminar flow conditions. Exposure to laminar shear stress triggered the relocalization of ROR2 to cell-cell junctions where it formed a complex with VE-Cadherin and β-catenin, thereby regulating adherens junctions remodeling at the rear and front poles of ECs. Finally, we showed that adherens junctions remodeling and cell polarity induced by ROR2 were dependent on the activation of the small GTPase Cdc42. CONCLUSIONS This study identified ROR2/planar cell polarity pathway as a new mechanism controlling and coordinating collective polarity patterns of EC during shear stress response.
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Affiliation(s)
- Pauline Bougaran
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
| | - Marie-Lise Bats
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
- CHU de Bordeaux, Service de Biochimie clinique, France (M.-L.B.)
| | - Valentin Delobel
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
| | - Sébastien Rubin
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
| | - Juliette Vaurs
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
| | - Thierry Couffinhal
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
- CHU de Bordeaux, Service des Maladies Cardiaques et Vasculaires, Pessac, France (T.C.)
| | - Cécile Duplàa
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
| | - Pascale Dufourcq
- University Bordeaux, INSERM, Biologie des maladies cardiovasculaires, Pessac, France (P.B., M.-L.B., V.D., S.R., J.V., T.C., C.D., P.D.)
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2
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Abelanet A, Camoin M, Rubin S, Bougaran P, Delobel V, Pernot M, Forfar I, Guilbeau-Frugier C, Galès C, Bats ML, Renault MA, Dufourcq P, Couffinhal T, Duplàa C. Increased Capillary Permeability in Heart Induces Diastolic Dysfunction Independently of Inflammation, Fibrosis, or Cardiomyocyte Dysfunction. Arterioscler Thromb Vasc Biol 2022; 42:745-763. [PMID: 35510550 DOI: 10.1161/atvbaha.121.317319] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND While endothelial dysfunction is suggested to contribute to heart failure with preserved ejection fraction pathophysiology, understanding the importance of the endothelium alone, in the pathogenesis of diastolic abnormalities has not yet been fully elucidated. Here, we investigated the consequences of specific endothelial dysfunction on cardiac function, independently of any comorbidity or risk factor (diabetes or obesity) and their potential effect on cardiomyocyte. METHODS The ubiquitine ligase Pdzrn3, expressed in endothelial cells (ECs), was shown to destabilize tight junction. A genetic mouse model in which Pdzrn3 is overexpressed in EC (iEC-Pdzrn3) in adults was developed. RESULTS EC-specific Pdzrn3 expression increased cardiac leakage of IgG and fibrinogen blood-born molecules. The induced edema demonstrated features of diastolic dysfunction, with increased end-diastolic pressure, alteration of dP/dt min, increased natriuretic peptides, in addition to limited exercise capacity, without major signs of cardiac fibrosis and inflammation. Electron microscopic images showed edema with disrupted EC-cardiomyocyte interactions. RNA sequencing analysis of gene expression in cardiac EC demonstrated a decrease in genes coding for endothelial extracellular matrix proteins, which could be related to the fragile blood vessel phenotype. Irregularly shaped capillaries with hemorrhages were found in heart sections of iEC-Pdzrn3 mice. We also found that a high-fat diet was not sufficient to provoke diastolic dysfunction; high-fat diet aggravated cardiac inflammation, associated with an altered cardiac metabolic signature in EC-Pdzrn3 mice, reminiscent of heart failure with preserved ejection fraction features. CONCLUSIONS An increase of endothelial permeability is responsible for mediating diastolic dysfunction pathophysiology and for aggravating detrimental effects of a high-fat diet on cardiac inflammation and metabolism.
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Affiliation(s)
- Alice Abelanet
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.)
| | - Marion Camoin
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.).,CHU de Bordeaux, Pessac, France (M.C., S.R., M.P., M.L.B., P.D., T.C.)
| | - Sebastien Rubin
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.).,CHU de Bordeaux, Pessac, France (M.C., S.R., M.P., M.L.B., P.D., T.C.)
| | - Pauline Bougaran
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.)
| | - Valentin Delobel
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.)
| | - Mathieu Pernot
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.).,CHU de Bordeaux, Pessac, France (M.C., S.R., M.P., M.L.B., P.D., T.C.)
| | - Isabelle Forfar
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.)
| | - Céline Guilbeau-Frugier
- Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, INSERM U1048, I2MC, France (C.G.-F., C.G.)
| | - Céline Galès
- Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, INSERM U1048, I2MC, France (C.G.-F., C.G.)
| | - Marie Lise Bats
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.).,CHU de Bordeaux, Pessac, France (M.C., S.R., M.P., M.L.B., P.D., T.C.)
| | - Marie-Ange Renault
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.)
| | - Pascale Dufourcq
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.).,CHU de Bordeaux, Pessac, France (M.C., S.R., M.P., M.L.B., P.D., T.C.)
| | - Thierry Couffinhal
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.).,CHU de Bordeaux, Pessac, France (M.C., S.R., M.P., M.L.B., P.D., T.C.)
| | - Cécile Duplàa
- University of Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, Pessac, France (A.A., M.C., S.R., P.B., V.D., M.P., I.F., M.L.B., M.-A.R., P.D., T.C., C.D.)
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Bats ML, Peghaire C, Delobel V, Dufourcq P, Couffinhal T, Duplàa C. Wnt/frizzled Signaling in Endothelium: A Major Player in Blood-Retinal- and Blood-Brain-Barrier Integrity. Cold Spring Harb Perspect Med 2022; 12:a041219. [PMID: 35074794 PMCID: PMC9121893 DOI: 10.1101/cshperspect.a041219] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The Wnt/frizzled signaling pathway is one of the major regulators of endothelial biology, controlling key cellular activities. Many secreted Wnt ligands have been identified and can initiate diverse signaling via binding to a complex set of Frizzled (Fzd) transmembrane receptors and coreceptors. Roughly, Wnt signaling is subdivided into two pathways: the canonical Wnt/β-catenin signaling pathway whose main downstream effector is the transcriptional coactivator β-catenin, and the noncanonical Wnt signaling pathway, which is subdivided into the Wnt/Ca2+ pathway and the planar cell polarity pathway. Here, we will focus on its cross talk with other angiogenic pathways and on its role in blood-retinal- and blood-brain-barrier formation and its maintenance in a differentiated state. We will unravel how retinal vascular pathologies and neurovascular degenerative diseases result from disruption of the Wnt pathway related to vascular instability, and highlight current research into therapeutic options.
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Affiliation(s)
- Marie-Lise Bats
- Univ. Bordeaux, Inserm, UMR1034, Biology of Cardiovascular Diseases, F-33600 Pessac, France
- Department of Biochemistry, Pellegrin Hospital, University Hospital of Bordeaux, 33076 Bordeaux Cedex, France
| | - Claire Peghaire
- Univ. Bordeaux, Inserm, UMR1034, Biology of Cardiovascular Diseases, F-33600 Pessac, France
| | - Valentin Delobel
- Univ. Bordeaux, Inserm, UMR1034, Biology of Cardiovascular Diseases, F-33600 Pessac, France
| | - Pascale Dufourcq
- Univ. Bordeaux, Inserm, UMR1034, Biology of Cardiovascular Diseases, F-33600 Pessac, France
| | - Thierry Couffinhal
- Univ. Bordeaux, Inserm, UMR1034, Biology of Cardiovascular Diseases, F-33600 Pessac, France
- Centre d'exploration, de prévention et de traitement de l'athérosclérose (CEPTA), CHU Bordeaux, 33000 Bordeaux, France
| | - Cécile Duplàa
- Univ. Bordeaux, Inserm, UMR1034, Biology of Cardiovascular Diseases, F-33600 Pessac, France
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4
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Rubin S, Bougaran P, Martin S, Abelanet A, Delobel V, Pernot M, Jeanningros S, Bats ML, Combe C, Dufourcq P, Debette S, Couffinhal T, Duplàa C. PHACTR-1 (Phosphatase and Actin Regulator 1) Deficiency in Either Endothelial or Smooth Muscle Cells Does Not Predispose Mice to Nonatherosclerotic Arteriopathies in 3 Transgenic Mice. Arterioscler Thromb Vasc Biol 2022; 42:597-609. [PMID: 35387477 DOI: 10.1161/atvbaha.122.317431] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Genome-wide association studies have revealed robust associations of common genetic polymorphisms in an intron of the PHACTR-1 (phosphatase and actin regulator 1) gene (chr6p24), with cervical artery dissection, spontaneous coronary artery dissection, and fibromuscular dysplasia. The aim was to assess its role in the pathogenesis of cervical artery dissection or fibromuscular dysplasia. METHODS Using various tissue-specific Cre-driver mouse lines, Phactr1 was deleted either in endothelial cells using 2 tissue-specific Cre-driver (PDGFB [platelet-derived growth factor B]-CreERT2 mice and Tie2 [tyrosine kinase with immunoglobulin and EGF homology domains]-Cre) and smooth muscle cells (smooth muscle actin-CreERT2) with a third tissue-specific Cre-driver. RESULTS To test the efficacy of the Phactr1 deletion after cre-induction, we confirmed first, a decrease in Phactr1 transcription and Phactr1 expression in endothelial cell and smooth muscle cell isolated from Phactr1iPDGFB and Phactr1iSMA mice. Irrespective to the tissue or the duration of the deletion, mice did not spontaneously display pathological phenotype or vascular impairment: mouse survival, growth, blood pressure, large vessel morphology, or actin organization were not different in knockout mice than their comparatives littermates. Challenging vascular function and repair either by angiotensin II-induced hypertension or limb ischemia did not lead to vascular morphology or function impairment in Phactr1-deleted mice. Similarly, there were no more consequences of Phactr1 deletion during embryogenesis in endothelial cells. CONCLUSIONS Loss of PHACTR-1 function in the cells involved in vascular physiology does not appear to induce a pathological vascular phenotype. The in vivo effect of the intronic variation described in genome-wide association studies is unlikely to involve downregulation in PHACTR-1 expression.
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Affiliation(s)
- Sébastien Rubin
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.).,Service de Néphrologie, Transplantation, Dialyse et Aphérèses (S.R., C.C.), Hôpital Pellegrin, CHU de Bordeaux, France
| | - Pauline Bougaran
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Soizic Martin
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Alice Abelanet
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Valentin Delobel
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Mathieu Pernot
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Sylvie Jeanningros
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Marie-Lise Bats
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.).,Service de Biochimie (M.-L.B.), Hôpital Pellegrin, CHU de Bordeaux, France
| | - Christian Combe
- Service de Néphrologie, Transplantation, Dialyse et Aphérèses (S.R., C.C.), Hôpital Pellegrin, CHU de Bordeaux, France.,University of Bordeaux, Unité INSERM 1026, Université de Bordeaux, France (C.C.)
| | - Pascale Dufourcq
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
| | - Stéphanie Debette
- University of Bordeaux, INSERM, Bordeaux Population Health Center, UMR1219, France (S.D.).,Bordeaux University Hospital, Department of Neurology, Institute of Neurodegenerative Diseases, France (S.D.)
| | - Thierry Couffinhal
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.).,Service des Maladies Cardiaques et Vasculaires, Hôpital Haut-Léveque CHU de Bordeaux, Pessac, France (T.C.)
| | - Cécile Duplàa
- University of Bordeaux, INSERM, Biologie des Maladies Cardiovasculaires, U1034, Pessac, France (S.R., P.B., S.M., A.A., V.D., M.P., S.J., M.-L.B., P.D., T.C., C.D.)
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5
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Gueniot F, Rubin S, Bougaran P, Abelanet A, Morel JL, Bontempi B, Proust C, Dufourcq P, Couffinhal T, Duplàa C. Targeting Pdzrn3 maintains adult blood-brain barrier and central nervous system homeostasis. J Cereb Blood Flow Metab 2022; 42:613-629. [PMID: 34644209 PMCID: PMC9051145 DOI: 10.1177/0271678x211048981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Blood brain barrier (BBB) disruption is a critical component of the pathophysiology of cognitive impairment of vascular etiology (VCI) and associated with Alzheimer's disease (AD). The Wnt pathway plays a crucial role in BBB maintenance, but there is limited data on its role in cognitive pathologies. The E3 ubiquitin ligase PDZRN3 is a regulator of the Wnt pathway. In a murine model of VCI, overexpressing Pdzrn3 in endothelial cell (EC) exacerbated BBB hyperpermeability and accelerated cognitive decline. We extended these observations, in both VCI and AD models, showing that EC-specific depletion of Pdzrn3, reinforced the BBB, with a decrease in vascular permeability and a subsequent spare in cognitive decline. We found that in cerebral vessels, Pdzrn3 depletion protects against AD-induced Wnt target gene alterations and enhances endothelial tight junctional proteins. Our results provide evidence that Wnt signaling could be a molecular link regulating BBB integrity and cognitive decline under VCI and AD pathologies.
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Affiliation(s)
- Florian Gueniot
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Sebastien Rubin
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Pauline Bougaran
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Alice Abelanet
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | | | | | - Carole Proust
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Pascale Dufourcq
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France.,Service de Biochimie clinique, CHU de Bordeaux, Bordeaux, France
| | - Thierry Couffinhal
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France.,Service des Maladies cardiaques et vasculaires, CHU de Bordeaux, Bordeaux, France
| | - Cecile Duplàa
- Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
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6
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Rubin S, Bougaran P, Martin S, Abelanet A, Delobel V, Jeannigros S, Bats M, Dufourcq P, Couffinhal T, Duplàa C. No direct involvement of Phactr-1 in non-atherosclerotic arteriopathies: Results from 3 different Phactr-1 transgenic knockout mice. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2021.04.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Aguillon R, Madelaine R, Aguirrebengoa M, Guturu H, Link S, Dufourcq P, Lecaudey V, Bejerano G, Blader P, Batut J. Morphogenesis is transcriptionally coupled to neurogenesis during peripheral olfactory organ development. Development 2020; 147:226001. [PMID: 33144399 DOI: 10.1242/dev.192971] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 10/28/2020] [Indexed: 01/04/2023]
Abstract
Sense organs acquire their distinctive shapes concomitantly with the differentiation of sensory cells and neurons necessary for their function. Although our understanding of the mechanisms controlling morphogenesis and neurogenesis in these structures has grown, how these processes are coordinated remains largely unexplored. Neurogenesis in the zebrafish olfactory epithelium requires the bHLH proneural transcription factor Neurogenin 1 (Neurog1). To address whether Neurog1 also controls morphogenesis, we analysed the migratory behaviour of early olfactory neural progenitors in neurog1 mutant embryos. Our results indicate that the oriented movements of these progenitors are disrupted in this context. Morphogenesis is similarly affected by mutations in the chemokine receptor gene, cxcr4b, suggesting it is a potential Neurog1 target gene. We find that Neurog1 directly regulates cxcr4b through an E-box cluster located just upstream of the cxcr4b transcription start site. Our results suggest that proneural transcription factors, such as Neurog1, directly couple distinct aspects of nervous system development.
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Affiliation(s)
- Raphaël Aguillon
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR 3743), Université de Toulouse, CNRS, UPS, 31062, France
| | - Romain Madelaine
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR 3743), Université de Toulouse, CNRS, UPS, 31062, France
| | - Marion Aguirrebengoa
- BigA Core Facility, Centre de Biologie Intégrative (CBI, FR 3743), Université de Toulouse, CNRS, UPS, 31062, France
| | - Harendra Guturu
- Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Sandra Link
- BIOSS Centre for Biological Signalling Studies, Albert Ludwigs University of Freiburg, D-79104 Freiburg im Breisgau, Germany
| | - Pascale Dufourcq
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR 3743), Université de Toulouse, CNRS, UPS, 31062, France
| | - Virginie Lecaudey
- BIOSS Centre for Biological Signalling Studies, Albert Ludwigs University of Freiburg, D-79104 Freiburg im Breisgau, Germany
| | - Gill Bejerano
- Department of Developmental Biology, Department of Computer Science, Department of Pediatrics, Department of Biomedical Data Science, Stanford University, Stanford, CA 94305, USA
| | - Patrick Blader
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR 3743), Université de Toulouse, CNRS, UPS, 31062, France
| | - Julie Batut
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR 3743), Université de Toulouse, CNRS, UPS, 31062, France
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Abstract
Blood flow produces mechanical frictional forces, parallel to the blood flow exerted on the endothelial wall of the vessel, the so-called wall shear stress (WSS). WSS sensing is associated with several vascular pathologies, but it is first a physiological phenomenon. Endothelial cell sensitivity to WSS is involved in several developmental and physiological vascular processes such as angiogenesis and vascular morphogenesis, vascular remodeling, and vascular tone. Local conditions of blood flow determine the characteristics of WSS, i.e., intensity, direction, pulsatility, sensed by the endothelial cells that, through their effect of the vascular network, impact WSS. All these processes generate a local-global retroactive loop that determines the ability of the vascular system to ensure the perfusion of the tissues. In order to account for the physiological role of WSS, the so-called shear stress set point theory has been proposed, according to which WSS sensing acts locally on vessel remodeling so that WSS is maintained close to a set point value, with local and distant effects of vascular blood flow. The aim of this article is (1) to review the existing literature on WSS sensing involvement on the behavior of endothelial cells and its short-term (vasoreactivity) and long-term (vascular morphogenesis and remodeling) effects on vascular functioning in physiological condition; (2) to present the various hypotheses about WSS sensors and analyze the conceptual background of these representations, in particular the concept of tensional prestress or biotensegrity; and (3) to analyze the relevance, explanatory value, and limitations of the WSS set point theory, that should be viewed as dynamical, and not algorithmic, processes, acting in a self-organized way. We conclude that this dynamic set point theory and the biotensegrity concept provide a relevant explanatory framework to analyze the physiological mechanisms of WSS sensing and their possible shift toward pathological situations.
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Affiliation(s)
- Etienne Roux
- Inserm, UMR 1034, Biology of Cardiovascular Diseases, University of Bordeaux, Bordeaux, France.,UMR 8560 IHPST - Institut d'Histoire et de Philosophie des Sciences et des Techniques, CNRS, Université Paris 1 Panthéon-Sorbonne, Paris, France
| | - Pauline Bougaran
- Inserm, UMR 1034, Biology of Cardiovascular Diseases, University of Bordeaux, Bordeaux, France
| | - Pascale Dufourcq
- Inserm, UMR 1034, Biology of Cardiovascular Diseases, University of Bordeaux, Bordeaux, France
| | - Thierry Couffinhal
- Inserm, UMR 1034, Biology of Cardiovascular Diseases, University of Bordeaux, Bordeaux, France
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9
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Bats ML, Bougaran P, Peghaire C, Gueniot F, Abelanet A, Chan H, Séguy C, Jeanningros S, Jaspard-Vinassa B, Couffinhal T, Duplàa C, Dufourcq P. Therapies targeting Frizzled-7/β-catenin pathway prevent the development of pathological angiogenesis in an ischemic retinopathy model. FASEB J 2019; 34:1288-1303. [PMID: 31914666 DOI: 10.1096/fj.201901886r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/28/2019] [Accepted: 11/11/2019] [Indexed: 12/24/2022]
Abstract
Retinopathies remain major causes of visual impairment in diabetic patients and premature infants. Introduction of anti-angiogenic drugs targeting vascular endothelial growth factor (VEGF) has transformed therapy for these proliferative retinopathies. However, limitations associated with anti-VEGF medications require to unravel new pathways of vessel growth to identify potential drug targets. Here, we investigated the role of Wnt/Frizzled-7 (Fzd7) pathway in a mouse model of oxygen-induced retinopathy (OIR). Using transgenic mice, which enabled endothelium-specific and time-specific Fzd7 deletion, we demonstrated that Fzd7 controls both vaso-obliteration and neovascular phases (NV). Deletion of Fzd7 at P12, after the ischemic phase of OIR, prevented formation of aberrant neovessels into the vitreous by suppressing proliferation of endothelial cells (EC) in tufts. Next we validated in vitro two Frd7 blocking strategies: a monoclonal antibody (mAbFzd7) against Fzd7 and a soluble Fzd7 receptor (CRD). In vivo a single intravitreal microinjection of mAbFzd7 or CRD significantly attenuated retinal neovascularization (NV) in mice with OIR. Molecular analysis revealed that Fzd7 may act through the activation of Wnt/β-catenin and Jagged1 expression to control EC proliferation in extra-retinal neovessels. We identified Fzd7/β-catenin signaling as new regulator of pathological retinal NV. Fzd7 appears to be a potent pharmacological target to prevent or treat aberrant angiogenesis of ischemic retinopathies.
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Affiliation(s)
- Marie-Lise Bats
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France.,Service de Biochimie clinique, CHU de Bordeaux, Bordeaux, France
| | - Pauline Bougaran
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Claire Peghaire
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,NHLI-Vascular Science, Imperial College London, London, UK
| | - Florian Gueniot
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Alice Abelanet
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Hélène Chan
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France
| | - Camille Séguy
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France
| | | | - Béatrice Jaspard-Vinassa
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Thierry Couffinhal
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France.,Service des Maladies cardiaques et vasculaires, CHU de Bordeaux, Bordeaux, France
| | - Cécile Duplàa
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
| | - Pascale Dufourcq
- Biology of Cardiovascular Diseases, Inserm U1034, Pessac, France.,Biology of Cardiovascular Diseases, University of Bordeaux U1034, Bordeaux, France
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10
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Bougaran P, Bats M, Jeanningros S, Couffinhal T, Duplàa C, Dufourcq P. ROR2 involvement in endothelial cells responses to flow. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.02.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Collins MM, Maischein HM, Dufourcq P, Charpentier M, Blader P, Stainier DY. Pitx2c orchestrates embryonic axis extension via mesendodermal cell migration. eLife 2018; 7:34880. [PMID: 29952749 PMCID: PMC6023614 DOI: 10.7554/elife.34880] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 06/14/2018] [Indexed: 12/13/2022] Open
Abstract
Pitx2c, a homeodomain transcription factor, is classically known for its left-right patterning role. However, an early wave of pitx2 expression occurs at the onset of gastrulation in several species, indicating a possible earlier role that remains relatively unexplored. Here we show that in zebrafish, maternal-zygotic (MZ) pitx2c mutants exhibit a shortened body axis indicative of convergence and extension (CE) defects. Live imaging reveals that MZpitx2c mutants display less persistent mesendodermal migration during late stages of gastrulation. Transplant data indicate that Pitx2c functions cell non-autonomously to regulate this cell behavior by modulating cell shape and protrusive activity. Using transcriptomic analyses and candidate gene approaches, we identify transcriptional changes in components of the chemokine-ECM-integrin dependent mesendodermal migration network. Together, our results define pathways downstream of Pitx2c that are required during early embryogenesis and reveal novel functions for Pitx2c as a regulator of morphogenesis.
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Affiliation(s)
- Michelle M Collins
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Hans-Martin Maischein
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Pascale Dufourcq
- Centre de Biologie du Développement, Centre de Biologie Intégrative, Université Toulouse III - Paul Sabatier, CNRS, Toulouse, France
| | | | - Patrick Blader
- Centre de Biologie du Développement, Centre de Biologie Intégrative, Université Toulouse III - Paul Sabatier, CNRS, Toulouse, France
| | - Didier Yr Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
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12
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Aguillon R, Batut J, Subramanian A, Madelaine R, Dufourcq P, Schilling TF, Blader P. Cell-type heterogeneity in the early zebrafish olfactory epithelium is generated from progenitors within preplacodal ectoderm. eLife 2018; 7. [PMID: 29292696 PMCID: PMC5749950 DOI: 10.7554/elife.32041] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 12/15/2017] [Indexed: 12/25/2022] Open
Abstract
The zebrafish olfactory epithelium comprises a variety of neuronal populations, which are thought to have distinct embryonic origins. For instance, while ciliated sensory neurons arise from preplacodal ectoderm (PPE), previous lineage tracing studies suggest that both Gonadotropin releasing hormone 3 (Gnrh3) and microvillous sensory neurons derive from cranial neural crest (CNC). We find that the expression of Islet1/2 is restricted to Gnrh3 neurons associated with the olfactory epithelium. Unexpectedly, however, we find no change in Islet1/2+ cell numbers in sox10 mutant embryos, calling into question their CNC origin. Lineage reconstruction based on backtracking in time-lapse confocal datasets, and confirmed by photoconversion experiments, reveals that Gnrh3 neurons derive from the anterior PPE. Similarly, all of the microvillous sensory neurons we have traced arise from preplacodal progenitors. Our results suggest that rather than originating from separate ectodermal populations, cell-type heterogeneity is generated from overlapping pools of progenitors within the preplacodal ectoderm.
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Affiliation(s)
- Raphaël Aguillon
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Julie Batut
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Arul Subramanian
- Department of Developmental and Cell Biology, University of California, Irvine, United States
| | - Romain Madelaine
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Pascale Dufourcq
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Thomas F Schilling
- Department of Developmental and Cell Biology, University of California, Irvine, United States
| | - Patrick Blader
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
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13
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Sewduth RN, Kovacic H, Jaspard-Vinassa B, Jecko V, Wavasseur T, Fritsch N, Pernot M, Jeaningros S, Roux E, Dufourcq P, Couffinhal T, Duplàa C. PDZRN3 destabilizes endothelial cell-cell junctions through a PKCζ-containing polarity complex to increase vascular permeability. Sci Signal 2017; 10:10/464/eaag3209. [DOI: 10.1126/scisignal.aag3209] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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14
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Peghaire C, Bats ML, Sewduth R, Jeanningros S, Jaspard B, Couffinhal T, Duplàa C, Dufourcq P. Fzd7 (Frizzled-7) Expressed by Endothelial Cells Controls Blood Vessel Formation Through Wnt/β-Catenin Canonical Signaling. Arterioscler Thromb Vasc Biol 2016; 36:2369-2380. [PMID: 27758766 DOI: 10.1161/atvbaha.116.307926] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 09/22/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Vessel formation requires precise orchestration of a series of morphometric and molecular events controlled by a multitude of angiogenic factors and morphogens. Wnt/frizzled signaling is required for proper vascular formation. In this study, we investigated the role of the Fzd7 (frizzled-7) receptor in retinal vascular development and its relationship with the Wnt/β-catenin canonical pathway and Notch signaling. APPROACH AND RESULTS Using transgenic mice, we demonstrated that Fzd7 is required for postnatal vascular formation. Endothelial cell (EC) deletion of fzd7 (fzd7ECKO) delayed retinal plexus formation because of an impairment in tip cell phenotype and a decrease in stalk cell proliferation. Dvl (dishevelled) proteins are a main component of Wnt signaling and play a functionally redundant role. We found that Dvl3 depletion in dvl1-/- mice mimicked the fzd7ECKO vascular phenotype and demonstrated that Fzd7 acted via β-catenin activation by showing that LiCl treatment rescued impairment in tip and stalk cell phenotypes induced in fzd7 mutants. Deletion of fzd7 or Dvl1/3 induced a strong decrease in Wnt canonical genes and Notch partners' expression. Genetic and pharmacological rescue strategies demonstrated that Fzd7 acted via β-catenin activation, upstream of Notch signaling to control Dll4 and Jagged1 EC expression. CONCLUSIONS Fzd7 expressed by EC drives postnatal angiogenesis via activation of Dvl/β-catenin signaling and can control the integrative interaction of Wnt and Notch signaling during postnatal angiogenesis.
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Affiliation(s)
- Claire Peghaire
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Marie Lise Bats
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Raj Sewduth
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Sylvie Jeanningros
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Beatrice Jaspard
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Thierry Couffinhal
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Cécile Duplàa
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.)
| | - Pascale Dufourcq
- From the Biology of Cardiovascular Diseases, INSERM U1034, Pessac, France (M.L.B., S.J., B.J., T.C., C.D., P.D.); Biology of Cardiovascular Diseases, University of Bordeaux, U1034, France (M.L.B., B.J., T.C., C.D., P.D.); Service des Maladies cardiaques et vasculaires (T.C.) and Service de Biochimie clinique (M.L.B.), CHU de Bordeaux, France; National Heart and Lung Institute, Vascular Science, Imperial Center for Translational and Experimental Medicine, Imperial College London, Hammersmith Hospital, United Kingdom (C.P.); and Laboratorium voor Endotheliale Moleculaire Biologie, Vesalius Research Center, Leuven, Belgium (R.S.).
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15
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Moisan F, Nissen J, Kaulanjan-Checkmodine P, Prey S, Dufourcq P, Couffinhal T, Rezvani H, Taieb A. 043 Mechanism of action of propranolol in Infantile Hemangioma: New insights from a xenograft model. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Bats ML, Peghaire C, Jeanningros S, Jaspard-Vinassa B, Duplàa C, Couffinhal T, Dufourcq P. 0297 : Targeting frizzled7 in endothelial cells: a novel approach to treat aberrant angiogenesis in proliferative retinopathy. Archives of Cardiovascular Diseases Supplements 2016. [DOI: 10.1016/s1878-6480(16)30406-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Guillabert-Gourgues A, Jaspard-Vinassa B, Bats ML, Sewduth RN, Franzl N, Peghaire C, Jeanningros S, Moreau C, Roux E, Larrieu-Lahargue F, Dufourcq P, Couffinhal T, Duplàa C. Kif26b controls endothelial cell polarity through the Dishevelled/Daam1-dependent planar cell polarity-signaling pathway. Mol Biol Cell 2016; 27:941-53. [PMID: 26792835 PMCID: PMC4791138 DOI: 10.1091/mbc.e14-08-1332] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 01/13/2016] [Indexed: 11/11/2022] Open
Abstract
Angiogenesis involves the coordinated growth and migration of endothelial cells (ECs) toward a proangiogenic signal. The Wnt planar cell polarity (PCP) pathway, through the recruitment of Dishevelled (Dvl) and Dvl-associated activator of morphogenesis (Daam1), has been proposed to regulate cell actin cytoskeleton and microtubule (MT) reorganization for oriented cell migration. Here we report that Kif26b--a kinesin--and Daam1 cooperatively regulate initiation of EC sprouting and directional migration via MT reorganization. First, we find that Kif26b is recruited within the Dvl3/Daam1 complex. Using a three-dimensional in vitro angiogenesis assay, we show that Kif26b and Daam1 depletion impairs tip cell polarization and destabilizes extended vascular processes. Kif26b depletion specifically alters EC directional migration and mislocalized MT organizing center (MTOC)/Golgi and myosin IIB cell rear enrichment. Therefore the cell fails to establish a proper front-rear polarity. Of interest, Kif26b ectopic expression rescues the siDaam1 polarization defect phenotype. Finally, we show that Kif26b functions in MT stabilization, which is indispensable for asymmetrical cell structure reorganization. These data demonstrate that Kif26b, together with Dvl3/Daam1, initiates cell polarity through the control of PCP signaling pathway-dependent activation.
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Affiliation(s)
| | - Beatrice Jaspard-Vinassa
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France Adaptation Cardiovasculaire à l'Ischémie, U1034, Université de Bordeaux, F-33600 Pessac, France
| | - Marie-Lise Bats
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France Adaptation Cardiovasculaire à l'Ischémie, U1034, Université de Bordeaux, F-33600 Pessac, France
| | - Raj N Sewduth
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France
| | - Nathalie Franzl
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France
| | - Claire Peghaire
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France
| | - Sylvie Jeanningros
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France
| | - Catherine Moreau
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France
| | - Etienne Roux
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France Adaptation Cardiovasculaire à l'Ischémie, U1034, Université de Bordeaux, F-33600 Pessac, France
| | | | - Pascale Dufourcq
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France Adaptation Cardiovasculaire à l'Ischémie, U1034, Université de Bordeaux, F-33600 Pessac, France
| | - Thierry Couffinhal
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France Adaptation Cardiovasculaire à l'Ischémie, U1034, Université de Bordeaux, F-33600 Pessac, France Service des Maladies Cardiaques et Vasculaires, Centre Hospitalier Universitaire de Bordeaux, F-33000 Bordeaux, France
| | - Cecile Duplàa
- Adaptation Cardiovasculaire à l'Ischémie, INSERM, U1034, F-33600 Pessac, France Adaptation Cardiovasculaire à l'Ischémie, U1034, Université de Bordeaux, F-33600 Pessac, France
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18
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Abstract
Although the left and right hemispheres of our brains develop with a high degree of symmetry at both the anatomical and functional levels, it has become clear that subtle structural differences exist between the two sides and that each is dominant in processing specific cognitive tasks. As the result of evolutionary conservation or convergence, lateralization of the brain is found in both vertebrates and invertebrates, suggesting that it provides significant fitness for animal life. This widespread feature of hemispheric specialization has allowed the emergence of model systems to study its development and, in some cases, to link anatomical asymmetries to brain function and behavior. Here, we present some of what is known about brain asymmetry in humans and model organisms as well as what is known about the impact of environmental and genetic factors on brain asymmetry development. We specifically highlight the progress made in understanding the development of epithalamic asymmetries in zebrafish and how this model provides an exciting opportunity to address brain asymmetry at different levels of complexity.
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Affiliation(s)
- Véronique Duboc
- Université de Toulouse, UPS, Center de Biologie du Développement (CBD), F-31062 Toulouse, France; .,CNRS, CBD UMR 5547, F-31062 Toulouse, France
| | - Pascale Dufourcq
- Université de Toulouse, UPS, Center de Biologie du Développement (CBD), F-31062 Toulouse, France; .,CNRS, CBD UMR 5547, F-31062 Toulouse, France
| | - Patrick Blader
- Université de Toulouse, UPS, Center de Biologie du Développement (CBD), F-31062 Toulouse, France; .,CNRS, CBD UMR 5547, F-31062 Toulouse, France
| | - Myriam Roussigné
- Université de Toulouse, UPS, Center de Biologie du Développement (CBD), F-31062 Toulouse, France; .,CNRS, CBD UMR 5547, F-31062 Toulouse, France
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Sewduth RN, Jaspard-Vinassa B, Peghaire C, Guillabert A, Franzl N, Larrieu-Lahargue F, Moreau C, Fruttiger M, Dufourcq P, Couffinhal T, Duplàa C. The ubiquitin ligase PDZRN3 is required for vascular morphogenesis through Wnt/planar cell polarity signalling. Nat Commun 2014; 5:4832. [PMID: 25198863 DOI: 10.1038/ncomms5832] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 07/28/2014] [Indexed: 01/01/2023] Open
Abstract
Development and stabilization of a vascular plexus requires the coordination of multiple signalling processes. Wnt planar cell polarity (PCP) signalling is critical in vertebrates for diverse morphogenesis events, which coordinate cell orientation within a tissue-specific plane. However, its functional role in vascular morphogenesis is not well understood. Here we identify PDZRN3, an ubiquitin ligase, and report that Pdzrn3 deficiency impairs embryonic angiogenic remodelling and postnatal retinal vascular patterning, with a loss of two-dimensional polarized orientation of the intermediate retinal plexus. Using in vitro and ex vivo Pdzrn3 loss-of-function and gain-of-function experiments, we demonstrate a key role of PDZRN3 in endothelial cell directional and coordinated extension. PDZRN3 ubiquitinates Dishevelled 3 (Dvl3), to promote endocytosis of the Frizzled/Dvl3 complex, for PCP signal transduction. These results highlight the role of PDZRN3 to direct Wnt PCP signalling, and broadly implicate this pathway in the planar orientation and highly branched organization of vascular plexuses.
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Affiliation(s)
- Raj N Sewduth
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Béatrice Jaspard-Vinassa
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Claire Peghaire
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Aude Guillabert
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Nathalie Franzl
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | | | - Catherine Moreau
- INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | | | - Pascale Dufourcq
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
| | - Thierry Couffinhal
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [3] CHU de Bordeaux, Service des Maladies Cardiaques et Vasculaires, F-33000 Bordeaux, France
| | - Cécile Duplàa
- 1] INSERM, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France [2] Univ. Bordeaux, Adaptation cardiovasculaire à l'ischémie, U1034, F-33600 Pessac, France
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Ferreira Tojais N, Peghaire C, Franzl N, Larrieu-Lahargue F, Jaspard B, Reynaud A, Moreau C, Couffinhal T, Duplàa C, Dufourcq P. Frizzled7 controls vascular permeability through the Wnt-canonical pathway and cross-talk with endothelial cell junction complexes. Cardiovasc Res 2014; 103:291-303. [PMID: 24866384 DOI: 10.1093/cvr/cvu133] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
AIMS Vascular permeability is essential for the health of normal tissues and is an important characteristic of many disease states. The role of the Wnt/frizzled pathway in vascular biology has recently been reported. The objectives of this study are to analyse the role of Frizzled7 (Fzd7) receptor in the control of vascular integrity. METHODS AND RESULTS Fzd7 is expressed in endothelial cells and accumulates at the points of cell-cell contact in association with VE-cadherin and β-catenin, two major adherens junction molecules. To selectively delete fzd7 in the vasculature, we developed gene targeting approaches using CreLox strategy in mice. Genetic fzd7 inhibition in the endothelium increases vascular permeability in basal and factor-induced conditions. On the cellular level, fzd7 knockdown or depletion leads to an increase in paracellular permeability with a loss of adherens junction organization. These impairments are associated with a decrease in both VE-Cadherin and β-catenin expression, a decrease in their association and an increase of tyrosine phosphorylation of VE-cadherin/β-catenin. Fzd7 transduces a Wnt/β-catenin signalling cascade that is required to regulate β-catenin and canonical target gene expression. Finally, LiCl, a GSK3 inhibitor, and β-catenin overexpression rescued endothelial integrity and adherens junction organization, induced by fzd7 deletion. CONCLUSION These findings establish that Fzd7 is a new partner of adherens junctional complex and represents a novel molecular switch for the control of vascular permeability via activation of the Wnt-canonical pathway.
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Affiliation(s)
- Nancy Ferreira Tojais
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France Stanford University School of Medicine, Stanford, CA, USA
| | - Claire Peghaire
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Nathalie Franzl
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Frédéric Larrieu-Lahargue
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Béatrice Jaspard
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Annabelle Reynaud
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Catherine Moreau
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Thierry Couffinhal
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France Department of Cardiology, Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Cécile Duplàa
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
| | - Pascale Dufourcq
- Adaptation cardiovasculaire à l'ischémie, INSERM U1034, 125 Avenue du Haut Lévèque, 33 600 Pessac, France Adaptation cardiovasculaire à l'ischémie, Bordeaux University, U1034, Pessac, France
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21
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Garric L, Ronsin B, Roussigné M, Booton S, Gamse JT, Dufourcq P, Blader P. Pitx2c ensures habenular asymmetry by restricting parapineal cell number. Development 2014; 141:1572-9. [PMID: 24598158 DOI: 10.1242/dev.100305] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Left-right (L/R) asymmetries in the brain are thought to underlie lateralised cognitive functions. Understanding how neuroanatomical asymmetries are established has been achieved through the study of the zebrafish epithalamus. Morphological symmetry in the epithalamus is broken by leftward migration of the parapineal, which is required for the subsequent elaboration of left habenular identity; the habenular nuclei flank the midline and show L/R asymmetries in marker expression and connectivity. The Nodal target pitx2c is expressed in the left epithalamus, but nothing is known about its role during the establishment of asymmetry in the brain. We show that abrogating Pitx2c function leads to the right habenula adopting aspects of left character, and to an increase in parapineal cell numbers. Parapineal ablation in Pitx2c loss of function results in right habenular isomerism, indicating that the parapineal is required for the left character detected in the right habenula in this context. Partial parapineal ablation in the absence of Pitx2c, however, reduces the number of parapineal cells to wild-type levels and restores habenular asymmetry. We provide evidence suggesting that antagonism between Nodal and Pitx2c activities sets an upper limit on parapineal cell numbers. We conclude that restricting parapineal cell number is crucial for the correct elaboration of epithalamic asymmetry.
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Affiliation(s)
- Laurence Garric
- Université de Toulouse, UPS, Centre de Biologie du Développement (CBD), 118 route de Narbonne, F-31062 Toulouse, France
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22
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Ellertsdottir E, Berthold PR, Bouzaffour M, Dufourcq P, Trayer V, Gauron C, Vriz S, Affolter M, Rampon C. Developmental role of zebrafish protease-activated receptor 1 (PAR1) in the cardio-vascular system. PLoS One 2012; 7:e42131. [PMID: 22860064 PMCID: PMC3408399 DOI: 10.1371/journal.pone.0042131] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 07/03/2012] [Indexed: 01/24/2023] Open
Abstract
Thrombin receptor, F2R or PAR1 is a G-protein coupled receptor, located in the membrane of endothelial cells. It has been initially found to transduce signals in hemostasis, but recently also known to act in cancer and in vascular development. Mouse embryos lacking PAR1 function die from hemorrhages with varying frequency at midgestation. We have performed a survey of potential PAR1 homologs in the zebrafish genome and identified a teleost ortholog of mammalian PAR1. Knockdown of par1 function in zebrafish embryos demonstrates a requirement for Par1 in cardio-vascular development. Furthermore, we show that function of Par1 requires the presence of a phylogenetically conserved proteolytic cleavage site and a second intracellular domain. Altogether our results demonstrate a high degree of conservation of PAR1 proteins in the vertebrate lineage in respect to amino acid sequence as well as protein function.
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Affiliation(s)
- Elin Ellertsdottir
- Biozentrum der Universität Basel, Growth and Development, Basel, Switzerland
| | | | | | | | | | - Carole Gauron
- Center for Interdisciplinary Research in Biology, College de France, Paris, France
- Centre national de la recherche scientifique UMR 7241 and Institut National de la Santé et de la Recherche Médicale, Paris, France
| | - Sophie Vriz
- Univ Paris Diderot, Sorbonne Paris Cité, Paris, France
- Center for Interdisciplinary Research in Biology, College de France, Paris, France
- Centre national de la recherche scientifique UMR 7241 and Institut National de la Santé et de la Recherche Médicale, Paris, France
| | - Markus Affolter
- Biozentrum der Universität Basel, Growth and Development, Basel, Switzerland
| | - Christine Rampon
- Univ Paris Diderot, Sorbonne Paris Cité, Paris, France
- Center for Interdisciplinary Research in Biology, College de France, Paris, France
- Centre national de la recherche scientifique UMR 7241 and Institut National de la Santé et de la Recherche Médicale, Paris, France
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23
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Barandon L, Casassus F, Leroux L, Moreau C, Allières C, Lamazière JMD, Dufourcq P, Couffinhal T, Duplàa C. Secreted frizzled-related protein-1 improves postinfarction scar formation through a modulation of inflammatory response. Arterioscler Thromb Vasc Biol 2012; 31:e80-7. [PMID: 21836067 DOI: 10.1161/atvbaha.111.232280] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE The inflammatory response after myocardial infarction plays a crucial role in the healing process. Lately, there is accumulating evidence that the Wnt/Frizzled pathway may play a distinct role in inflammation. We have shown that secreted frizzled-related protein-1 (sFRP-1) overexpression reduced postinfarction scar size, and we noticed a decrease in neutrophil infiltration in the ischemic tissue. We aimed to further elucidate the role of sFRP-1 in the postischemic inflammatory process. METHODS AND RESULTS We found that in vitro, sFRP-1 was able to block leukocyte activation and cytokine production. We transplanted bone marrow cells (BMCs) from transgenic mice overexpressing sFRP-1 into wild-type recipient mice and compared myocardial healing with that of mice transplanted with wild-type BMCs. These results were compared with those obtained in transgenic mice overexpressing sFRP-1 specifically in endothelial cells or in cardiomyocytes to better understand the spatiotemporal mechanism of the sFRP-1 effect. Our findings indicate that when overexpressed in the BMCs, but not in endothelial cells or cardiomyocytes, sFRP-1 was able to reduce neutrophil infiltration after ischemia, by switching the balance of pro- and antiinflammatory cytokine expression, leading to a reduction in scar formation and better cardiac hemodynamic parameters. CONCLUSION sFRP-1 impaired the loop of cytokine amplification and decreased neutrophil activation and recruitment into the scar, without altering the neutrophil properties. These data support the notion that sFRP-1 may be a novel antiinflammatory factor protecting the heart from damage after myocardial infarction.
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Affiliation(s)
- Laurent Barandon
- Université de Bordeaux, Adaptation Cardiovasculaire à l'ischémie, U1034, Pessac, France
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24
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Descamps B, Sewduth R, Ferreira Tojais N, Jaspard B, Reynaud A, Sohet F, Lacolley P, Allières C, Lamazière JMD, Moreau C, Dufourcq P, Couffinhal T, Duplàa C. Frizzled 4 Regulates Arterial Network Organization Through Noncanonical Wnt/Planar Cell Polarity Signaling. Circ Res 2012; 110:47-58. [DOI: 10.1161/circresaha.111.250936] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Rationale:
A growing body of evidence supports the hypothesis that the Wnt/planar cell polarity (PCP) pathway regulates endothelial cell proliferation and angiogenesis, but the components that mediate this regulation remain elusive.
Objective:
We investigated the involvement of one of the receptors, Frizzled4 (Fzd4), in this process because its role has been implicated in retinal vascular development.
Methods and Results:
We found that loss of
fzd4
function in mice results in a striking reduction and impairment of the distal small artery network in the heart and kidney. We report that loss of
fzd4
decreases vascular cell proliferation and migration and decreases the ability of the endothelial cells to form tubes. We show that
fzd4
deletion induces defects in the expression level of stable acetylated tubulin and in Golgi organization during migration. Deletion of
fzd4
favors Wnt noncanonical AP1-dependent signaling, indicating that Fzd4 plays a pivotal role favoring PCP signaling. Our data further demonstrate that Fzd4 is predominantly localized on the top of the plasma membrane, where it preferentially induces Dvl3 relocalization to promote its activation and α-tubulin recruitment during migration. In a pathological mouse angiogenic model, deletion of
fzd4
impairs the angiogenic response and leads to the formation of a disorganized arterial network.
Conclusions:
These results suggest that Fzd4 is a major receptor involved in arterial formation and organization through a Wnt/PCP pathway.
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Affiliation(s)
- Betty Descamps
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Raj Sewduth
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Nancy Ferreira Tojais
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Béatrice Jaspard
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Annabel Reynaud
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Fabien Sohet
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Patrick Lacolley
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Cécile Allières
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Jean-Marie Daniel Lamazière
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Catherine Moreau
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Pascale Dufourcq
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Thierry Couffinhal
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
| | - Cécile Duplàa
- From the Inserm (B.D., R.S., N.F.T., B.J., A.R., C.A., J.-M.D.L., C.M., P.D., T.C., C.D.), U1034, Pessac, France and University de Bordeaux, Bordeaux, France; Unité Inserm U872 (F.S.), Centre de Recherche des Cordeliers, Paris, France; Université Henri Poincaré (P.L., P.D.), Inserm U961, Nancy, France; Laboratoire de biochimie (T.C.), UFR Sciences Pharmaceutiques, University de Bordeaux, Bordeaux, France; Department of Cardiology (C.D.), Pôle Cardiothoracique, Hôpital Haut Lévêque, Pessac, France
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Oses P, Renault MA, Chauvel R, Leroux L, Allières C, Séguy B, Lamazière JMD, Dufourcq P, Couffinhal T, Duplàa C. Mapping 3-dimensional neovessel organization steps using micro-computed tomography in a murine model of hindlimb ischemia-brief report. Arterioscler Thromb Vasc Biol 2009; 29:2090-2. [PMID: 19745199 DOI: 10.1161/atvbaha.109.192732] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Studying the mechanisms of neovascularization and evaluating the effects of proangiogenic strategies require accurate analysis of the neovascular network. We sought to evaluate the contribution of the microcomputed tomography (mCT) providing high-resolution 3-dimensional (3D) structural data, to a better comprehension of the well-studied mouse hindlimb postischemic neovascularization. METHODS AND RESULTS We showed a predominant arteriogenesis process in the thigh and a predominant angiogenesis-related process in the tibiofibular region, in response to ischemia during the first 15 days. After 15 days, mCT quantitative analysis reveals a remodeling of arterial neovessels and a regression depending on the restoration of the blood flow. We provided also new mCT data on the rapid and potent angiogenic effects of mesenchymal stem cell therapy on vessel formation and organization. We discussed the contribution of this technique compared with or in addition to data generated by the more conventional approaches. CONCLUSIONS This study demonstrated that optimized mCT is a robust method for providing new insights into the 3D understanding of postischemic vessel formation.
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Affiliation(s)
- Pierre Oses
- Inserm U828, Pessac, Université Victor Ségalen, Bordeaux, France
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Rampon C, Bouzaffour M, Ostuni MA, Dufourcq P, Girard C, Freyssinet JM, Lacapere JJ, Schweizer-Groyer G, Vriz S. Translocator protein (18 kDa) is involved in primitive erythropoiesis in zebrafish. FASEB J 2009; 23:4181-92. [PMID: 19723704 DOI: 10.1096/fj.09-129262] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The translocator protein (18 kDa) (TSPO), also known as peripheral-type benzodiazepine receptor, is directly or indirectly associated with many biological processes. Although extensively characterized, the specific function of TSPO during development remains unclear. It has been reported that TSPO is involved in a variety of mechanisms, including cell proliferation, apoptosis, regulation of mitochondrial functions, cholesterol transport and steroidogenesis, and porphyrin transport and heme synthesis. Although the literature has reported a murine knockout model, the experiment did not generate information because of early lethality. We then used the zebrafish model to address the function of tspo during development. Information about spatiotemporal expression showed that tspo has a maternal and a zygotic contribution which, during somatogenesis, seems to be erythroid restricted to the intermediate cell mass. Genetic and pharmacological approaches used to invalidate Tspo function resulted in embryos with specific erythropoietic cell depletion. Although unexpected, this lack of blood cells is independent of the Tspo cholesterol binding site and reveals a new in vivo key role for Tspo during erythropoiesis.
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Affiliation(s)
- Christine Rampon
- CNRS UMR 8542, Chaire des Processes Morphogénètiques, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
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27
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Abstract
The chemokine stromal cell-derived factor-1 (SDF1) was originally identified as a pre-B cell stimulatory factor but has been recently implicated in several other key steps in differentiation and morphogenesis. In addition, SDF1 as well as FGF signalling pathways have recently been shown to be involved in the control of epimorphic regeneration. In this report, we address the question of a possible interaction between the two signalling pathways during adult fin regeneration in zebrafish. Using a combination of pharmaceutical and genetic tools, we show that during epimorphic regeneration, expression of sdf1, as well as of its cognate receptors, cxcr4a, cxcr4b and cxcr7 are controlled by FGF signalling. We further show that, Sdf1a negatively regulates the expression of fgf20a. Together, these results lead us to propose that: 1) the function of Fgf in blastema formation is, at least in part, relayed by the chemokine Sdf1a, and that 2) Sdf1 exerts negative feedback on the Fgf pathway, which contributes to a transient expression of Fgf20a downstream genes at the beginning of regeneration. However this feedback control can be bypassed since the Sdf1 null mutants regenerate their fin, though slower. Very few mutants for the regeneration process were isolated so far, illustrating the difficulty in identifying genes that are indispensable for regeneration. This observation supports the idea that the regeneration process involves a delicate balance between multiple pathways.
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Affiliation(s)
- Mohamed Bouzaffour
- Université Paris Diderot, Paris, France
- Unité INSERM U770, Paris, France
- Université Paris XI, Le Kremlin-Bicêtre, France
| | - Pascale Dufourcq
- Université Paris Diderot, Paris, France
- Unité INSERM U770, Paris, France
- Université Paris XI, Le Kremlin-Bicêtre, France
| | | | | | - Sophie Vriz
- Université Paris Diderot, Paris, France
- Unité INSERM U770, Paris, France
- Université Paris XI, Le Kremlin-Bicêtre, France
- * E-mail:
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Ferreira Tojais N, Descamps B, Mione M, Moreau C, Daniel-Lamazière JM, Couffinhal T, Duplàa C, Dufourcq P. D008 First evidences of frizzled-7 involvement in vessel formation. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72218-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Descamps B, Ferreira Tojais N, Oses P, Moreau C, Daniel Lamaziere JM, Dufourcq P, Couffinhal T, Duplaa C. D009 Frizzled 4 regulates vascular formation in mice. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72219-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Leen LLS, Filipe C, Billon A, Garmy-Susini B, Jalvy S, Robbesyn F, Daret D, Allières C, Rittling SR, Werner N, Nickenig G, Deutsch U, Duplàa C, Dufourcq P, Lenfant F, Desgranges C, Arnal JF, Gadeau AP. Estrogen-stimulated endothelial repair requires osteopontin. Arterioscler Thromb Vasc Biol 2008; 28:2131-6. [PMID: 18772499 DOI: 10.1161/atvbaha.108.167965] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Estradiol (E(2)) is known to accelerate reendothelialization and thus prevent intimal thickening and in-stent restenosis after angioplasty. Transplantation experiments with ERalpha(-/-) mice have previously shown that E(2) acts through local and bone marrow cell compartments to enhance endothelial healing. However, the downstream mechanisms induced by E(2) to mediate endothelial repair are still poorly understood. METHODS AND RESULTS We show here that after endovascular carotid artery injury, E(2)-enhanced endothelial repair is lost in osteopontin-deficient mice (OPN(-/-)). Transplantation of OPN(-/-) bone marrow into wild-type lethally irradiated mice, and vice versa, suggested that osteopontin plays a crucial role in both the local and the bone marrow actions of E(2). In the vascular compartment, using transgenic mice expressing doxycyclin regulatable-osteopontin, we show that endothelial cell specific osteopontin overexpression mimics E(2)-enhanced endothelial cell migration and proliferation in the regenerating endothelium. In the bone marrow cell compartment, we demonstrate that E(2) enhances bone marrow-derived mononuclear cell adhesion to regenerating endothelium in vivo, and that this effect is dependent on osteopontin. CONCLUSIONS We demonstrate here that E(2) acceleration of the endothelial repair requires osteopontin, both for bone marrow-derived cell recruitment and for endothelial cell migration and proliferation.
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Dufourcq P, Descamps B, Tojais NF, Leroux L, Oses P, Daret D, Moreau C, Lamazière JMD, Couffinhal T, Duplàa C. Secreted frizzled-related protein-1 enhances mesenchymal stem cell function in angiogenesis and contributes to neovessel maturation. Stem Cells 2008; 26:2991-3001. [PMID: 18757297 DOI: 10.1634/stemcells.2008-0372] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mesenchymal stem cell (MSC) transplantation offers a great angiogenic opportunity in vascular regenerative medicine. The canonical Wnt/beta-catenin signaling pathway has been demonstrated to play an essential role in stem cell fate. Recently, genetic studies have implicated the Wnt/Frizzled (Fz) molecular pathway, namely Wnt7B and Fz4, in blood growth regulation. Here, we investigated whether MSC could be required in shaping a functional vasculature and whether secreted Frizzled-related protein-1 (sFRP1), a modulator of the Wnt/Fz pathway, could modify MSC capacities, endowing MSC to increase vessel maturation. In the engraftment model, we show that murine bone marrow-derived MSC induced a beneficial vascular effect through a direct cellular contribution to vascular cells. MSC quickly organized into primitive immature vessel tubes connected to host circulation; this organization preceded host endothelial cell (EC) and smooth muscle cell (SMC) recruitment to later form mature neovessel. MSC sustained neovessel organization and maturation. We report here that sFRP1 forced expression enhanced MSC surrounding neovessel, which was correlated with an increase in vessel maturation and functionality. In vitro, sFRP1 strongly increased platelet-derived growth factor-BB (PDGF-BB) expression in MSC and enhanced beta-catenin-dependent cell-cell contacts between MSC themselves and EC or SMC. In vivo, sFRP1 increased their functional integration around neovessels and vessel maturation through a glycogen synthase kinase 3 beta (GSK3beta)-dependent pathway. sFRP1-overexpressing MSC compared with control MSC were well elongated and in a closer contact with the vascular wall, conditions required to achieve an organized mature vessel wall. We propose that genetically modifying MSC to overexpress sFRP1 may be potentially effective in promoting therapeutic angiogenesis/arteriogenesis processes. Disclosure of potential conflicts of interest is found at the end of this article.
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Affiliation(s)
- Pascale Dufourcq
- Institut National de la Santé et de la Recherche Médicale U828, Université Victor Ségalen, Bordeaux2, Pessac, France.
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Derval N, Barandon L, Dufourcq P, Leroux L, Lamazière JMD, Daret D, Couffinhal T, Duplàa C. Epicardial deposition of endothelial progenitor and mesenchymal stem cells in a coated muscle patch after myocardial infarction in a murine model☆. Eur J Cardiothorac Surg 2008; 34:248-54. [DOI: 10.1016/j.ejcts.2008.03.058] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2008] [Revised: 03/11/2008] [Accepted: 03/14/2008] [Indexed: 11/24/2022] Open
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Dufourcq P, Leroux L, Ezan J, Descamps B, Lamazière JMD, Costet P, Basoni C, Moreau C, Deutsch U, Couffinhal T, Duplàa C. Regulation of endothelial cell cytoskeletal reorganization by a secreted frizzled-related protein-1 and frizzled 4- and frizzled 7-dependent pathway: role in neovessel formation. Am J Pathol 2007; 172:37-49. [PMID: 18156211 DOI: 10.2353/ajpath.2008.070130] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Consistent with findings of Wnt pathway members involved in vascular cells, a role for Wnt/Frizzled signaling has recently emerged in vascular cell development. Among the few Wnt family members implicated in vessel formation in adult, Wnt7b and Frizzled 4 have been shown as involved in vessel formation in the lung and in the retina, respectively. Our previous work has shown a role for secreted Frizzled-related protein-1 (sFRP-1), a proposed Wnt signaling inhibitor, in neovascularization after an ischemic event and demonstrated its role as a potent angiogenic factor. However the mechanisms involved have not been investigated. Here, we show that sFRP-1 treatment increases endothelial cell spreading on extracellular matrix as revealed by actin stress fiber reorganization in an integrin-dependent manner. We demonstrate that sFRP-1 can interact with Wnt receptors Frizzled 4 and 7 on endothelial cells to transduce downstream to cellular machineries requiring Rac-1 activity in cooperation with GSK-3beta. sFRP-1 overexpression in endothelium specifically reversed the inactivation of GSK-3 beta and increased neovascularization in ischemia-induced angiogenesis in mouse hindlimb. This study illustrates a regulated pathway by sFRP-1 involving GSK-3beta and Rac-1 in endothelial cell cytoskeletal reorganization and in neovessel formation.
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Couffinhal T, Dufourcq P, Duplàa C. Beta-catenin nuclear activation: common pathway between Wnt and growth factor signaling in vascular smooth muscle cell proliferation? Circ Res 2007; 99:1287-9. [PMID: 17158343 DOI: 10.1161/01.res.0000253139.82251.31] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Carney TJ, Dutton KA, Greenhill E, Delfino-Machín M, Dufourcq P, Blader P, Kelsh RN. A direct role for Sox10 in specification of neural crest-derived sensory neurons. Development 2006; 133:4619-30. [PMID: 17065232 DOI: 10.1242/dev.02668] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
sox10 is necessary for development of neural and pigment cell derivatives of the neural crest (NC). However, whereas a direct role for Sox10 activity has been established in pigment and glial lineages, this is more controversial in NC-derived sensory neurons of the dorsal root ganglia (DRGs). We proposed that sox10 functioned in specification of sensory neurons, whereas others suggested that sensory neuronal defects were merely secondary to absence of glia. Here we provide evidence that in zebrafish,early DRG sensory neuron survival is independent of differentiated glia. Critically, we demonstrate that Sox10 is expressed transiently in the sensory neuron lineage, and specifies sensory neuron precursors by regulating the proneural gene neurogenin1. Consistent with this, we have isolated a novel sox10 mutant that lacks glia and yet displays a neurogenic DRG phenotype. In conjunction with previous findings, these data establish the generality of our model of Sox10 function in NC fate specification.
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Affiliation(s)
- Thomas J Carney
- Centre for Regenerative Medicine, Developmental Biology Programme, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK
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Dufourcq P, Roussigné M, Blader P, Rosa F, Peyrieras N, Vriz S. Mechano-sensory organ regeneration in adults: the zebrafish lateral line as a model. Mol Cell Neurosci 2006; 33:180-7. [PMID: 16949838 DOI: 10.1016/j.mcn.2006.07.005] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2006] [Revised: 07/24/2006] [Accepted: 07/25/2006] [Indexed: 11/23/2022] Open
Abstract
In this report, we present a study of regeneration of the lateral line, a collection of mechano-sensory organ, in the adult zebrafish caudal fin. As all neuromasts are innervated by axon fibers, neuronal regeneration is a key issue in the regenerating process. We first show that support cells from the last neuromast adjacent to the amputation plane divide and migrate to colonize the blastema in order to reform the missing part of the lateral line. We then show that nerve re-growth takes place later than neuromast progenitor cell migration. We also provide evidence that new growth cones form at the amputation plane and subsequently follow the migrating placode-like structure to re-innervate regenerated neuromasts as they differentiate. Altogether, our observations indicate that caudal lateral line regeneration is not a mere recapitulation of the ontogenic process.
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Affiliation(s)
- Pascale Dufourcq
- INSERM U784, Ecole Normale Supérieure, 46 rue d'Ulm 75005 Paris, France.
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Dufourcq P, Vriz S. The chemokine SDF-1 regulates blastema formation during zebrafish fin regeneration. Dev Genes Evol 2006; 216:635-9. [PMID: 16586100 DOI: 10.1007/s00427-006-0066-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2005] [Accepted: 03/01/2006] [Indexed: 11/26/2022]
Abstract
The work presented in this study focuses on blastema formation in epimorphic regeneration. We describe the expression pattern of Sdf1a and Sdf1b (the chemokines stromal-cell-derived factor-1a and 1b) and their two receptors Cxcr4a and Cxcr4b during zebrafish fin regeneration. We demonstrate that Sdf1a/Cxcr4a plays a critical role in fin regeneration and more precisely in epidermal cell proliferation, an important process for blastema formation. In mammals, a single cxcr4 gene is involved both in chemotaxis and cell proliferation and survival; we discuss in this study a possible functional division of the two cxcr4 zebrafish genes.
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Affiliation(s)
- Pascale Dufourcq
- UFR de Biologie, Université Paris 7-Denis Diderot, 2 pl. Jussieu, 75005, Paris, France
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Whetstine JR, Ceron J, Ladd B, Dufourcq P, Reinke V, Shi Y. Regulation of tissue-specific and extracellular matrix-related genes by a class I histone deacetylase. Mol Cell 2005; 18:483-90. [PMID: 15893731 DOI: 10.1016/j.molcel.2005.04.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Revised: 02/17/2005] [Accepted: 04/08/2005] [Indexed: 10/25/2022]
Abstract
Class I histone deacetylases (HDACs) repress transcription by deacetylating histones and have been shown to play crucial roles in mouse, Xenopus, zebrafish, and C. elegans development. To identify the molecular networks regulated by a class I HDAC in a multicellular organism, we carried out a global gene expression profiling study using C. elegans embryos, and identified tissue-specific and extracellular matrix (ECM)-related genes as major HDA-1 targets. Ectopic expression of HDA-1 or C. elegans cystatin, an HDA-1 target identified from the microarray, significantly perturbed mammalian cell invasion. Similarly, RNAi depletion or overexpression of human HDAC-1 also affected cell migration. These findings suggest that HDA-1/HDAC-1 may play a critical, evolutionarily conserved role in regulating the extracellular microenvironment. Because human HDACs are targets for cancer therapy, these findings have significant implications in cancer treatment.
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Barandon L, Couffinhal T, Dufourcq P, Alzieu P, Daret D, Deville C, Duplàa C. Repair of myocardial infarction by epicardial deposition of bone-marrow-cell-coated muscle patch in a murine model. Ann Thorac Surg 2005; 78:1409-17. [PMID: 15464506 DOI: 10.1016/j.athoracsur.2003.12.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/29/2003] [Indexed: 11/18/2022]
Abstract
BACKGROUND Myocardial infarction results in irreversible myocyte loss. In a murine model, we tested the feasibility of a novel repair technique combining bone marrow cell (BMC) transplantation and cardiomyoplasty. METHODS Myocardial infarction was induced cryogenically in backcrossed ROSA 26 transgenic x C57BL/6J mice (n = 75). Thirty days later, surviving mice (n = 69) were randomized to sham treatment (rethoracotomy only; n = 11), patch only treatment (n = 29), or patch + BMC treatment (n = 29). Abdominal muscle patches were harvested from donor littermates not expressing the beta-galactosidase reporter gene and sutured on the epicardium directly above the infarct zone. Patch only-treated mice received uncoated patches. Patch + BMC-treated mice received patches coated with 5 x 10(6) beta-galactosidase-expressing BMCs embedded in a collagen-rich three-dimensional matrix. RESULTS Mortality rate was 52% after muscle patch implantation. Bone marrow cells were able to migrate from muscle patch into the infarct zone, as demonstrated by beta-galactosidase immunostaining, and ultimately constituted 8% of all cells in scar tissue (mean +/- standard deviation, 219 +/- 111/mm2). Angiogenesis and cell survival in the scar were improved by patch + BMC treatment. Left ventricular geometry and cardiac function were improved by patch treatment, with or without BMC, although the effects were stronger after patch + BMC treatment. CONCLUSIONS Epicardial deposition of a BMC-coated muscle patch is a promising approach to restoring cardiac function after myocardial infarction.
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Affiliation(s)
- Laurent Barandon
- Department of Cardiovascular Surgery and Cardiology, Haut-Lévêque Hospital, Pessac, France.
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Barandon L, Dufourcq P, Costet P, Moreau C, Allières C, Daret D, Dos Santos P, Daniel Lamazière JM, Couffinhal T, Duplàa C. Involvement of FrzA/sFRP-1 and the Wnt/frizzled pathway in ischemic preconditioning. Circ Res 2005; 96:1299-306. [PMID: 15920021 DOI: 10.1161/01.res.0000171895.06914.2c] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Phosphorylation and subsequent inactivation of glycogen synthase kinase (GSK)-3beta via the Akt/PI3-Kinase pathway during ischemic preconditioning (PC) has been shown to be cardioprotective. As FrzA/sFRP-1, a secreted antagonist of the Wnt/Frizzled pathway, is expressed in the heart and is able to decrease the phosphorylation of GSK-3beta in vitro on vascular cells, we examined its effect during PC using transgenic mouse overexpressing FrzA in cardiomyocytes (alpha-MHC promoter) under a conditional transgene expression approach (tet-off system). Overexpression of FrzA inhibited the increase in GSK-3beta phosphorylation as well as protein kinase C (PKC) epsilon activation in transgenic mice after PC as compared with littermates. Phospho-Akt (P-Akt), phospho-JNK, or the cytoplasmic beta-catenin levels were not modified, phospho-p38 (P-p38) was slightly increased in transgenic mice after PC as compared with littermates. FrzA transgenic mice displayed a larger infarct size and a greater worsening of cardiac function compared with littermates. All these differences were reversed by the addition of doxycycline. This study demonstrates for the first time that disruption of a beta-catenin independent Wnt/Frizzled pathway induces the activation of GSK-3beta and reverses the benefit of preconditioning.
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Affiliation(s)
- Laurent Barandon
- Department of Cardiovascular Surgery, Hôpital Haut Lévêque, Pessac, France
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Barandon L, Couffinhal T, Dufourcq P, Alzieu P, Moreau C, Daret D, Duplàa C. Exact relevance of bone marrow cells in the healing process after myocardial infarction: analysis with a murine model of bone marrow cell transplantation. Can J Cardiol 2005; 21:563-8. [PMID: 15940353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
BACKGROUND Cellular cardiomyoplasty has created new possibilities in cardiac regeneration. Several cell types can be used in the procedure, such as skeletal myoblasts and bone marrow cells. Recent publications have suggested that bone marrow cells may be excellent candidates due to their pluripotency, but their actual role in cardiac regeneration is unknown. OBJECTIVE To evaluate the exact physiological role of bone marrow cells in the healing process after myocardial infarction. METHODS A mouse bone marrow cell transplantation model was used in which transplanted cells were easily detectable by immunohistochemistry. Chimeric mice were subjected to myocardial infarction by ligation of the left descending coronary artery. After one month, the mice were sacrificed and the scars were analyzed. RESULTS Transplanted bone marrow cells were detected in the scars and these cells seemed able to transdifferentiate into endothelial cells, but no transdifferentiation into cardiomyocytes occurred. This mechanism of regeneration was dismissed because only 2% of the vessels in the scars were positive for transplanted cells. CONCLUSIONS Bone marrow cells might be involved in myocardial healing, but this physiological mechanism is insufficient to allow correct regeneration.
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Affiliation(s)
- Laurent Barandon
- Department of Cardiovascular Surgery, Montreal Heart Intsitute, Montreal, Quebec, Canada.
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Barandon L, Couffinhal T, Dufourcq P, Daret D, Allières C, Alzieu P, Deville C, Duplàa C. [Study of postmyocardial infarction scar-formation mechanisms: advantage of an experimental myocardial infarction model in mice]. Can J Cardiol 2004; 20:1467-75. [PMID: 15614343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
Myocardial infarction involves scar-formation mechanisms in which inflammation, proliferation, cell differentiation, apoptosis and angiogenesis all play a role. Better knowledge of the scar-formation process would be helpful in developing new therapies. The authors have generated a mouse model for infarction because its possible application in transgenic mice would allow the role of target genes in postinfarction scar-formation mechanisms to be studied. An infarction is caused by ligating the descending branch of the left coronary artery. At various times after ligation, the mice are sacrificed to determine the size of the infarction, left ventricular function and the overall myocardial scar-formation process. Early mortality was 10%. Between the fourth and sixth day postsurgery, 25% of mice died of a ruptured, infarcted left ventricle. The size of the infarctions diminished with time, while the surface of the left ventricle increased. In hemodynamics, 15 and 30 days after infarction, left ventricle telediastolic pressure was higher, telesystolic pressure was lower and contractility in indexes had collapsed. After an inflammatory phase in which polynuclear neutrophils colonized the scar, granulation tissue set in with a proliferation of myofibroblasts and growth of new blood vessels. These cells disappeared from the scar gradually, leaving behind a matrix rich in collagen and devoid of any contractile properties. The authors have characterized a murine model of myocardial infarction, with applications in transgenic mice and in view of establishing new agents in postmyocardial infarction repair.
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Barandon L, Leroux L, Dufourcq P, Plagnol P, Deville C, Duplaa C, Couffinhal T. Gene Therapy for Chronic Peripheral Arterial Disease: What Role for the Vascular Surgeon? Ann Vasc Surg 2004; 18:758-65. [PMID: 15599638 DOI: 10.1007/s10016-004-0115-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The incidence of peripheral arterial disease is rising and despite advances in clinical management, many problems remain unsolved. Better knowledge of the mechanisms and consequences associated with chronic muscle ischemia has opened the way for development of new treatment strategies, including therapeutic angiogenesis. Therapeutic angiogenesis is a promising technique based on experimental studies showing that growth factors or genes able to increase capillary density can be used to reduce the impact of muscle ischemia and increase blood flow to ischemic tissue. Enthusiasm for this technique has prompted numerous clinical trials with encouraging results, but data are still inconclusive. Optimal indications for gene therapy must be defined and further experimental progress is needed to respond to ethical issues. Therapeutic angiogenesis should be viewed as an adjunct to rather than as a competitor of current surgical revascularization techniques.
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Affiliation(s)
- Laurent Barandon
- Department of Cardiovascular Surgery, Haut-Leveque Hospital, Pessac, France.
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Abstract
We describe the isolation of zebrafish growth factor independent 1 (gfi1) and present an analysis of its pattern of expression during early development. As with its murine homologue, gfi1 expression is detected in the ganglion cells of the neural retina and in developing hair cells of the ear. In keeping with a role in the development of sensory hair cells, gfi1 is also expressed in neuromasts of the anterior and posterior lateral line system. Finally, gfi1 is expressed in the developing epithalamus in the dorsal diencephalon where its transcription is restricted to the parapineal.
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Affiliation(s)
- Pascale Dufourcq
- Centre de Biologie du Développement UMR5547, bât. 4R3, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France
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Ezan J, Leroux L, Barandon L, Dufourcq P, Jaspard B, Moreau C, Allières C, Daret D, Couffinhal T, Duplàa C. FrzA/sFRP-1, a secreted antagonist of the Wnt-Frizzled pathway, controls vascular cell proliferation in vitro and in vivo. Cardiovasc Res 2004; 63:731-8. [PMID: 15306229 DOI: 10.1016/j.cardiores.2004.05.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2003] [Revised: 05/11/2004] [Accepted: 05/13/2004] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE FrzA, a member of the group of secreted frizzled related proteins (sFRP) that is expressed in the cardiovascular system, has been shown to antagonize the Wnt/frizzled signaling pathway. We have recently demonstrated its role in vascular cell growth control in vitro. In this study, we aimed to examine the mechanisms by which FrzA exerts its antiproliferative effect on vascular cells in vitro and its potential effect in vivo. METHODS AND RESULTS On synchronized, growth-arrested endothelial cells (EC) and smooth muscle cells (SMC) treated with the recombinant purified FrzA protein, flow cytometry analysis showed that the recombinant FrzA protein delayed G1 phase and entry into S-phase. Western blot experiments demonstrated that the treatment of EC or SMC with FrzA was associated with a decrease in the level of the cyclins and cyclin-dependent kinases and an increase in cytosolic phospho-beta-catenin levels. The FrzA-induced cell cycle delay was resolved by 24 h. C57BL/6J mice underwent surgery to produce unilateral hindlimb ischemia and empty adenoviruses (AdE) or adenoviruses coding for FrzA (AdFrzA) were injected at the time of the surgery. In AdFrzA-treated mice in the 7 days following surgery, we showed a decrease in cell proliferation, capillary density, and blood flow recovery and a reduced expression of cyclin and cdk activity in the ischemic muscle compared to that in the AdE-treated ischemic muscle. To gain insight into the pathway activated by FrzA overexpression, we showed an increase in the level of cytosolic phospho-beta-catenin, a marker of beta-catenin degradation, in AdFrzA-treated ischemic muscle compared to that in control AdE-treated ischemic muscle. CONCLUSION We provided the first evidence that an impairment of the Wnt-Frizzled pathway, via FrzA overexpression, controlled proliferation and neovascularization after muscle ischemia.
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Affiliation(s)
- Jérome Ezan
- Inserm U441, Avenue du Haut Lévêque, 33 600 Pessac, France, and Université Victor Segalen Bordeaux 2, rue léo Saignat, 33 000 Bordeaux, France
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Barandon L, Couffinhal T, Dufourcq P, Ezan J, Costet P, Daret D, Deville C, Duplàa C. Frizzled A, a novel angiogenic factor: promises for cardiac repair. Eur J Cardiothorac Surg 2004; 25:76-83. [PMID: 14690736 DOI: 10.1016/s1010-7940(03)00506-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE Frizzled A is a very recent protein expressed in the cardiovascular hood by cardiomyocytes and by endothelial cells. This protein plays key roles in vitro in vascular cell proliferation and is able to induce an in vivo angiogenic response. Regarding these properties, we assess the hypothesis that Frizzled A could act in the healing process after myocardial infarction. METHODS To investigate the role of Frizzled A, we established a transgenic mouse line overexpressing the protein and developed a model of myocardial infarction by coronary artery ligation. RESULTS The incidence of cardiac rupture after myocardial infarction was reduced in transgenic mice (6.5 versus 26.4% in controls, n=165; P<0.01). Infarct sizes were smaller in transgenic mice (18% of left ventricle circumference versus 28.1% in control at day 30; P<0.001; n=6) and the cardiac function was improved (3800 +/- 370 versus 2800 +/- 840 mmHg/s dp/dtmax in controls, -2800 +/- 440 versus -1800 +/- 211 dp/dtmin in controls at day 15; P<0.001; n=6). Early leukocyte infiltration had decreased in transgenic mice during the first week (103 +/- 59 versus 730 +/- 463 cells/mm2 in controls at day 7; P<0.001; n=6) and the apoptotic index was decreased by 50% at day 7. Capillary density in the scar was higher in transgenic mice (290 +/- 103 versus 104 +/- 43 vessels/mm2 in control at day 15; P<0.001) and vessels were more muscularized and mean lumen area was 3-fold higher (952 +/- 902 versus 313 +/- 350 microm2 in control; P<0.001). CONCLUSION Overexpression of Frizzled A reduced the infarct size, improved cardiac recovery, modified inflammatory response and amplified angiogenesis. For these reasons, this protein would be of interest for cardiac surgeons using angiogenic therapy (as gene or protein injection) in ischemic heart diseases in non-revascularizable patients.
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Affiliation(s)
- Laurent Barandon
- Pr Deville Department of Cardio-Vascular Surgery, Haut-Lévêque Hospital, Pessac 33604, France.
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Barandon L, Couffinhal T, Ezan J, Dufourcq P, Costet P, Alzieu P, Leroux L, Moreau C, Dare D, Duplàa C. Reduction of infarct size and prevention of cardiac rupture in transgenic mice overexpressing FrzA. Circulation 2003; 108:2282-9. [PMID: 14581414 DOI: 10.1161/01.cir.0000093186.22847.4c] [Citation(s) in RCA: 173] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND FrzA/sFRP-1, a secreted, frizzled-related protein and antagonist for the wnt/frizzled pathway, is expressed in the heart and vessels during mouse embryogenesis and adulthood. FrzA is involved in cell cycle control of vascular cells and angiogenesis. We assessed the hypothesis that FrzA could control the healing process after myocardial infarction (MI). METHODS AND RESULTS We demonstrated an upregulation of sFRP-1 and distinct wnt and fz member expression after MI. We established transgenic (Tg) mice that overexpress FrzA under a cytomegalovirus promoter and developed a model of MI by coronary artery ligation. FrzA reduced cardiac rupture after MI in Tg (6.5% versus 26.4% in controls; n=165, P<0.01). MI was smaller in Tg at each time point (18+/-10.8% of left ventricular circumference versus 30+/-14.2% in controls at day 30; P<0.001). Similar results were found in cryolesion-induced MI. Cardiac function was improved in Tg mice (3800+/-370 mm Hg/s dP/dtmax versus 2800+/-840 in controls; -2800+/-440 dP/dtmin versus -1800+/-211 in controls at day 15; P<0.001). Early leukocyte infiltration had decreased in Tg mice during the first week. Apoptotic index was decreased by 50% in Tg mice at day 7. Matrix metalloproteinase-2 and -9 activity was reduced in Tg mice at day 4, and collagen deposition in the scar was increased in Tg mice. Capillary density in the scar was higher in Tg mice (290+/-103 vessels/mm2 versus 104+/-43 in controls at day 15; P<0.001). Vessels were more muscularized, and mean lumen area was 3-fold higher in Tg animals. CONCLUSIONS Overexpression of FrzA, through direct or indirect interaction with different phases of infarct healing, reduced infarct size and improved cardiac function.
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Affiliation(s)
- Laurent Barandon
- Department of Cardiovascular Surgery and Cardiology, Hôpital Haut Lévêque, Pessac, France
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Abstract
BACKGROUND The secreted frizzled related proteins (sFRP) are soluble proteins thought to interfere with the Wnt signaling. Our group previously demonstrated that one of these members, sFRP-1/FrzA, is strongly expressed during early phases of the vascularization process in embryonic vasculature and in the endothelium of arteries and capillaries in adults and modulated vascular cell proliferation. METHODS AND RESULTS Analysis of the expression of sFRP-1 during cyclic ovarian angiogenesis revealed that sFRP-1 is expressed during the formation of neovessels and becomes undetectable when the vasculature is fully maturated. We then studied the role of FrzA in several distinct angiogenic models. FrzA induced angiogenesis in a chick chorioallantoic membrane model. Moreover, gene transfer of AdFrzA in grafted mesenchymal and glioma cells increased vessel density and tumor growth. FrzA induced formation of vessels, which were enlarged, longer, and appeared to be more mature compared with vessels formed under control treatments. In vitro, FrzA increased migration and tube formation of endothelial cells and seemed to protect them from apoptosis. FrzA-angiogenic effect in vitro was independent of vascular endothelial growth factor, fibroblast growth factor-2, or angiopiotin-1 induction and Akt activation. In contrast, FrzA decreased glycogen synthase kinase-3 phosphorylation. CONCLUSIONS These results showed that FrzA has proangiogenic effects and suggest that Wnt signaling may be involved in normal differentiation as well as in the pathological development of vasculature.
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Dufourcq P, Victor M, Gay F, Calvo D, Hodgkin J, Shi Y. Functional requirement for histone deacetylase 1 in Caenorhabditis elegans gonadogenesis. Mol Cell Biol 2002; 22:3024-34. [PMID: 11940660 PMCID: PMC133761 DOI: 10.1128/mcb.22.9.3024-3034.2002] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2001] [Revised: 11/28/2001] [Accepted: 01/31/2002] [Indexed: 11/20/2022] Open
Abstract
Histone acetylation and deacetylation have been implicated in the regulation of gene expression. Molecular studies have shown that histone deacetylases (HDACs) function as transcriptional repressors. However, very little is known about their roles during development in multicellular organisms. We previously demonstrated that inhibition of maternal and zygotic expression of histone deacetylase 1 (HDA-1) causes embryonic lethality in Caenorhabditis elegans. Here, we report the identification of an hda-1 genetic mutant which has also been called a gon-10 mutant (for gonadogenesis defective 10) and show that loss of HDA-1 zygotic expression results in specific postembryonic defects in gonadogenesis and vulval development. We provide evidence that the lag-2 gene, which plays a role in gonadogenesis and vulval development and encodes a Notch ligand, is derepressed in gon-10 animals, suggesting that lag-2 may be a target of HDA-1. Our findings reveal a novel and specific function for the ubiquitously expressed HDA-1 in C. elegans gonadogenesis and place hda-1 in the Notch signaling pathway.
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Affiliation(s)
- Pascale Dufourcq
- Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA
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Dufourcq P, Couffinhal T, Alzieu P, Daret D, Moreau C, Duplàa C, Bonnet J. Vitronectin is up-regulated after vascular injury and vitronectin blockade prevents neointima formation. Cardiovasc Res 2002; 53:952-62. [PMID: 11922905 DOI: 10.1016/s0008-6363(01)00547-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE Smooth muscle cell (SMC) migration involves interactions with extracellular matrix (ECM) and is an important process in response to arterial wall injury. We investigated the expression and the functional role of vitronectin (VN) in the response after vascular injury. METHODS VN and alpha v beta 3/beta 5 integrin expressions were investigated after balloon carotid injury of Sprague-Dawley rats. Adventitial delivery of blocking antibodies to VN, alpha v beta 5 and beta 3 integrins were performed to assess their roles in neointima formation. In vitro, migration assays were carried out on human SMC. RESULTS Immunohistochemistry and in situ hybridization for VN showed an upregulation of VN during the early time points of intima formation. alpha v beta 3/beta 5 integrins expression correlated with VN expression. After 7 days, blocking antibodies to VN, alpha v beta 5 and beta 3 induced a significant decrease on intimal area associated with a decrease in intimal cell counts. A slight decrease in intimal cell proliferation without any effect on apoptosis was observed after VN blockade. In vitro, migrating SMC strongly expressed VN after injury and neutralizing anti-VN antibody inhibited SMC migration. Blocking experiment with anti-alpha v beta 5 and -alpha v beta 3 integrin antibodies showed that not only VN-alpha v beta 3 but also VN-alpha v beta 5 interactions are required for SMC migration. CONCLUSION This study characterizes the VN-ECM interaction in SMC and supports the role of VN in mediating SMC migration and neointimal formation in response to injury.
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Affiliation(s)
- Pascale Dufourcq
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 441, Athéroclérose, Avenue du Haut-Lévêque, 33600 Pessac, France.
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