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Related Experiment Videos

Matrix gene expression and decompensated heart failure: the aged SHR model.

M O Boluyt1, O H Bing

  • 1The University of Michigan, Laboratory of Molecular Kinesiology, 401 Washtenaw Avenue, Ann Arbor, MI 48109-2214, USA. boluytm@umich.edu

Cardiovascular Research
|April 25, 2000
PubMed
Summary

Aging hearts develop impaired function and excessive matrix buildup. The spontaneously hypertensive rat model reveals how matrix gene changes contribute to heart failure, offering therapeutic insights.

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Area of Science:

  • Cardiovascular Biology
  • Aging Research
  • Pharmacology

Background:

  • Aging is the primary risk factor for heart failure.
  • Cardiac hypertrophy can progress to decompensated heart failure with impaired function and excessive extracellular matrix accumulation.
  • The spontaneously hypertensive rat (SHR) model mimics age-related cardiac decompensation.

Purpose of the Study:

  • To investigate the role of extracellular matrix gene expression in the transition from compensated hypertrophy to decompensated heart failure in aging SHR.
  • To evaluate the therapeutic potential of modulating matrix gene expression in heart failure.

Main Methods:

  • Utilized the aged spontaneously hypertensive rat (SHR) model.
  • Analyzed age-associated changes in cardiac phenotype and gene expression, focusing on extracellular matrix components.

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  • Assessed the impact of drug treatments targeting matrix gene expression on myocardial function and survival.

    • Main Results:

    • The SHR model exhibits a transition from compensated hypertrophy to decompensated heart failure with aging.
    • This transition is associated with significant alterations in cardiac gene expression, particularly increased extracellular matrix genes.
    • Pharmacological interventions targeting matrix gene expression improved cardiac function and survival in SHR.

    Conclusions:

    • Extracellular matrix accumulation plays a critical role in the progression of heart failure during aging.
    • The aged SHR model is valuable for studying heart failure mechanisms and testing novel therapies.
    • Modulating matrix gene expression presents a promising therapeutic strategy for age-related heart failure.