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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
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Video Experimental Relacionado

Updated: Sep 8, 2025

Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs
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El colágeno XV preserva la función cardíaca y protege de la remodelación patológica después del infarto de miocardio

Sanna-Maria Karppinen1, Miki Aho1, Zoltan Szabo2,3

  • 1ECM-Hypoxia Research Unit, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.

The FEBS journal
|August 20, 2025
PubMed
Resumen
Este resumen es generado por máquina.

El colágeno XV (ColXV) es vital para la estructura y la función del corazón después de un infarto de miocardio (IM). Su ausencia conduce a un aumento de la rigidez cardíaca, deterioro de la función y remodelación adversa del ventrículo izquierdo después del infarto.

Palabras clave:
Colágeno XVremodelación de la matriz extracelularFibrosis en el cuerpocicatriz por infartorigidez del tejido

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Área de la Ciencia:

  • Biología cardiovascular
  • Investigación de la matriz extracelular
  • Fisiopatología del infarto de miocardio

Sus antecedentes:

  • La comprensión de la remodelación del ventrículo izquierdo (LV) y la fibrosis después del infarto de miocardio (IM) es crítica para la patología cardíaca.
  • El colágeno XV (ColXV) está implicado en la integridad del tejido cardíaco.

Objetivo del estudio:

  • Para analizar la expresión de ColXV en infarto de miocardio humano.
  • Evaluar el impacto de la deficiencia de ColXV en las respuestas cardíacas después del infarto agudo de miocardio (AMI) en ratones, centrándose en la fibrogénesis y la rigidez tisular.

Principales métodos:

  • Se analizaron muestras de infarto de miocardio humano para la expresión de ColXV.
  • Los ratones se sometieron a la ligadura LAD para la inducción de AMI.
  • La función cardíaca y la remodelación se evaluaron mediante ecocardiografía, mediciones de elasticidad, inmunohistoquímica y análisis ultrastructural.

Principales resultados:

  • La expresión de ColXV fue alta en cicatrices de infarto humano.
  • Los ratones Col15a1-/- mostraron un aumento de la rigidez de la LV, la regulación del gen relacionada con la fibrosis y la ultrastructura de la cicatriz interrumpida después de la AMI.
  • Los ratones knockout mostraron deterioro de la función cardíaca, fracción de eyección reducida y remodelación de LV significativa.

Conclusiones:

  • ColXV es esencial para mantener la estructura y la función cardíaca después de un IAM.
  • La deficiencia de ColXV resulta en una remodelación desregulada, una cicatriz frágil y un ventrículo izquierdo más rígido, lo que lleva a un fenotipo cardíaco más grave.
  • Estos hallazgos resaltan el papel de ColXV en la reparación cardíaca y sugieren posibles implicaciones terapéuticas para la recuperación del infarto de miocardio.