Extracellular matrix Basic and translational science: Highlights of the congress
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1 Extracellular matrix Basic and translational science: Highlights of the congress Stephane Heymans, Maastricht University Medical Centre, CARIM, Netherlands
2 Speaker
3 The extracellular matrix modulates cardiac cellular behaviour Proteoglycans (syndecans) Glycoproteins (thrombospondins) (Myo)fibroblast * Proliferation * Collagen production and cross-linking Exosomes/vesicles (micrornas) Cardiomyocyte * Hypertrophy * Survival Endothelial cell * Proliferation * Function Speaker Inflammatory cell * Invasion * Activation
4 Proteoglycans and glycoproteins protect against heart failure Thrombospondins, osteonectin (glycoproteins), syndecans (proteoglycans) Collagen production and maturation Myocyte survival Inflammation Δ Protect against cardiac systolic dysfunction Increase diastolic dysfunction Lynch JM, CellPapageorgiou A. CVR, 2012; Almen et al., JMCC, 2011; Schellings et al., J.Exp.Med, 2009; Swinnen et al., Circ, 2009; Herum KM, J Mol Cell Cardiol Jan;54:73-81; Finsen AV, PLoS One. 2011;6(12):e28302; Vanhoutte D. Circulation Jan 30;115(4):475-82; Schellings M, Hypertension Feb;55(2): Speaker
5 MicroRNAs in matrix-exosomes alters cardiac fibrosis and hypertrophy Inflammatory cells Cardiomyocyte * Hypertrophy * Death/apoptosis Exosomes Fibroblast * Proliferation * Fibrosis S Heymans
6 Extracellular matrix modulates cardiac cellular behaviour Proteoglycans (syndecans) Glycoproteins (thrombospondins) (Myo)fibroblast * Proliferation * Collagen production and cross-linking Exosomes/vesicles (micrornas) Cardiomyocyte * Hypertrophy * Survival Endothelial cell * Proliferation * Function Speaker Inflammatory cell * Invasion * Activation
7 Syndecan-1 and 4 increase collagen production and myocyte hypertrophy Syndecan-4 stress Syndecan-1 and 4 are cardiac stress sensors Syndecan-1 TGFbeta pathway fibrosis Syndecan-4 calcineurin-nfat pathway fibrosis/hypertrophy Increases interstitial fibrosis Increased collagen production & cross-linking Myocardial stiffnessꜛ Stimulates myocyte hypertrophy P CnA NFAT Decreases cardiac inflammation NFAT Strand ME, FEBS J May;280(10): ; Herum KM, J Mol Cell Cardiol Jan;54:73-81; Finsen AV, PLoS One. 2011;6(12):e28302; Vanhoutte D. Circulation Jan 30;115(4):475-82; Schellings M, Hypertension Feb;55(2): Geir Christensen, Vanhoutte and Kate Herum
8 Syndecan-4 affects myocardial stiffness in the pressure-overloaded heart Syndecan-4 KO mice & pressure-overload No titin changes Reduced total collagen Improved diastolic function Syndecan-1 KO mice & pressure-overload Reduced total collagen Improved diastolic function >< After MI: increased infarct rupture and dilatation INCREASED SYND1 and SYND4: DIASTOLIC DYSFUNCTION POST-INFARCT FAILURE Herum KM, J Mol Cell Cardiol Jan;54:73-81; Finsen AV, PLoS One. 2011;6(12):e28302; Vanhoutte D. Circulation Jan 30;115(4):475-82; Schellings M, Hypertension Feb;55(2): Kate M. Herum
9 The extracellular matrix modulates cardiac cellular behaviour Proteoglycans (syndecans) Glycoproteins (thrombospondins) (Myo)fibroblast * Proliferation * Collagen production and cross-linking Exosomes/vesicles (micrornas) Cardiomyocyte * Hypertrophy * Survival Endothelial cell * Proliferation * Function Speaker Inflammatory cell * Invasion * Activation
10 Thrombospondins stimulate myocyte surival and affects cardiac fibrosis Thrombospondin-1, -2 and 4 are cardiac stress responders TSP-1 TGFbeta TSP-2 MMPs; CD47; NOS (matrix) TSP-4 endoplasmatic reticulum protective response (cardiomyocyte) Thrombospondin-2 Collagen maturation improved Inflammation reduced Cardiomyocyte survival Thrombospondin-4 Cardiomyocyte survival protective ER response Prevents adverse cardiomyocyte hypertrophy ER/SR Increased TSP-1, -2 and -4: BiP PROTECTIVE AGAINST HYPERTENSIVE HEART DISEASE (-1, -2 and -4) PREVENTS INFARCT RUPTURE AND DILATATION (-1 and -2) BiP BiP BiP Thbs4 PERK eif2 -Phos eif 2 Translation selective ATF4 Translation inhibition Translation IRE1 XBP1 XBP1 mrna processing protease Golgi ATF6 ATF6 BiP Thbs4 Nucleus Site 1 protease Lynch JM, Cell. 2012; 149(6): ; Frolova EJ, FASEB J Jun;26(6): Cingolani, Circ Res Dec 9;109(12):1410; Frolova EG, FASEB J Jun;26(6):2363 Papageorgiou A. CVR, 2012; Almen et al., JMCC, 2011; Swinnen et al., Circ, 2009 Xia J, Hypertension Nov;58(5): J Molketin and A Papageorgiou
11 Proteomics for discovery Speaker
12 Extracellular Matrix Remodelling Proteomics as an integrated read-out of pathophysiology Protein analysis without the constraints of antibodies Improvement over previous studies that simply evaluated the total concentration of single proteins (i.e., collagen) Often without consideration of type (e.g., type I vs III vs IV) or quality (full-length collagen vs partially degraded) Porcine model of ischemia/reperfusion injury and validated in human Liquid chromatography tandem mass spectrometry ECM Imaging Barallobre-Barreiro J, M Circulation. Mayr 2012 Feb 14;125(6):789
13 New matrix targets discovered Cartilage intermediate layer protein 1, Matrilin-4, Extracellular adipocyte enhancer binding protein 1, Asporin Prolargin Proteoglycans (syndecans) Glycoproteins (thrombospondins) Barallobre-Barreiro J, Circulation Feb 14;125(6):789 Speaker
14 Extracellular Matrix Degradation: degradome Proteomics enhances degradome resolution Discovery pipeline for biomarkers and imaging targets Identify isoform-specific cleavage sites of matrix metalloproteinases Cleavage peptides may harbor as-yet undiscovered bioactive properties Stegemann C, Circ Cardiovasc Genet Feb;6(1):106
15 The extracellular matrix modulates cardiac cellular behaviour Proteoglycans (syndecans) Glycoproteins (thrombospondins) (Myo)fibroblast * Proliferation * Collagen production and cross-linking Exosomes/vesicles (micrornas) Endothelial cell * Proliferation * Function Speaker Cardiomyocyte * Hypertrophy * Survival Inflammatory cell * Invasion * Activation
16 Exosome-derived microrna-21 increased cardiomyocyte hypertrophy and fibrosis Monocytes-MF MicroRNA-21 Fibroblast activation and fibrosis MicroRNA-21 * Cardiomyocyte Hypertrophy Claudia Bang & Shashi Kumar Gupta
17 Sirius Red H&E MHC-miR-199b NFAT : -exaggerated hypertrophy -increased fibrosis Syndecan-4 Myocyte hypertrophy Increased collagen Burcu Duygu
18 The extracellular matrix modulates cardiac cellular behaviour Proteoglycans (syndecans) Glycoproteins (thrombospondins) Exosomes/vesicles (micrornas) S Heymans
19 Increased synd-1 and -4 causes diastolic dysfunction but prevent infarct dilatation Syndecan-1 and 4 Collagen production (TGF & NFAT) Myocyte hypertrophy (NFAT) Inflammation Less infarct rupture & dilatation Diastolic dysfunction S Heymans
20 Thrombospondings protect against diastolic and systolic heart failure Thrombospondins Collagen maturation (TSP-1 & 2) Myocyte survival (TSP-2 & 4) Inflammation (TSP-2 & 4) Protect against systolic heart failure S Heymans
21 MicroRNAs in matrix-exosomes alters cardiac fibrosis and hypertrophy Inflammatory cells MicroRNA-199b Cardiomyocyte * Hypertrophy MicroRNA-(21 (*) ) Fibroblast * Collagen production SS Heymanspeaker
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