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RESEARCH PRODUCT
The involvement of MMP-2 and MMP-9 in heart exercise-related angiogenesis
Antonio PalmaGiuseppe BattagliaAntonio PaoliFelicia FarinaMarianna BellafioreAntonino Biancosubject
Malemedicine.medical_specialtyPathologyCapillary growthAngiogenesisNeovascularization PhysiologicBiologyMatrix metalloproteinaseGeneral Biochemistry Genetics and Molecular BiologyVascular remodelling in the embryoNeovascularizationMicePhysical Conditioning AnimalInternal medicineCardiac remodellingmedicineAnimalsAerobic exerciseZymographyMyocardiocyteAerobic trainingMedicine(all)Settore M-EDF/02 - Metodi E Didattiche Delle Attivita' SportiveBiochemistry Genetics and Molecular Biology(all)ResearchCapillary growthGeneral MedicineCoronary VesselsCapillariesPlatelet Endothelial Cell Adhesion Molecule-1Matrix metalloproteinasesEndocrinologyMatrix Metalloproteinase 9Capillary growth Matrix metalloproteinases Aerobic training Myocardiocyte Cardiac remodellingMatrix Metalloproteinase 2Electrophoresis Polyacrylamide Gelmedicine.symptomImmunostainingdescription
Background Little is known about the involvement of matrix metalloproteinases (MMPs) in cardiac vascular remodelling induced by exercise. Our aim was to evaluate and localize MMP-2 and MMP-9’s activities in relation to capillary proliferation in mouse hearts trained for 15, 30 and 45 days. Methods Sixty-three mice were randomly assigned to 7 groups: four control sedentary groups (C0, C15, C30 and C45) and three groups trained by an endurance protocol (T15, T30 and T45). MMP-2 and MMP-9 were examined with zymography and immunostaining analyses. Capillary proliferation was evaluated counting the number of CD31-positive cells. Results Different activity patterns of the latent form of both MMPs were found. Pro-MMP-9 increased after 15 days of training; whereas pro-MMP-2 gradually decreased after 30 and 45 days of training below the control groups. The latter was inversely correlated with capillary growth. MMP-9 was mainly localized in myocardiocytes and less evident in capillaries. Conversely, MMP-2 was more intense in capillary endothelial cells and slightly in myocardiocytes. Conclusions A different spatiotemporal modulation of pro-MMP-2 and pro-MMP-9 activities has been detected in the myocardium during angiogenesis related to the aerobic training. These results can be useful to draw up training protocols for improving the performance of healthy and diseased human hearts.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 | Journal of Translational Medicine |