What does this research mean for the field?

Mechanical unloading of the failing heart via left ventricular assist device (LVAD) support reduces matrix metalloproteinase (MMP-1 and -9) activity, increases tissue inhibitors of metalloproteinases (TIMP-1 and -3), and diminishes collagen matrix damage, which may contribute to left ventricular plasticity and functional recovery. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to investigate the effects of left ventricular assist device (LVAD) support on matrix metalloproteinases (MMPs) and collagen damage in the failing heart.

September 4, 2001CirculationOpen Access

Downregulation of Matrix Metalloproteinases and Reduction in Collagen Damage in the Failing Human Heart After Support With Left Ventricular Assist Devices

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Why the study?

Does left ventricular assist device (LVAD) support reduce matrix metalloproteinases and collagen damage in patients with dilated or ischemic cardiomyopathy?

Key Points

This research aims to investigate the effects of left ventricular assist device (LVAD) support on matrix metalloproteinases (MMPs) and collagen damage in the failing heart.
Collected LV samples from patients with DCM (n=14) and ICM (n=16) at LVAD implantation and during cardiac transplantation.
Measured MMPs by ELISA, gelatinolytic activity by zymography, and TIMPs by Western blot.
Quantified collagen content using pepsin solubilization and Sircol collagen assay.
MMP-1 and -9 decreased, while TIMP-1 and -3 increased post-LVAD support.
Increased undenatured collagen and improved ratios of undenatured to total soluble and insoluble to total soluble collagens after LVAD support.
These changes indicate diminished collagen matrix damage and potential contribution to cardiac recovery.

Structured PICO

Does left ventricular assist device (LVAD) support reduce matrix metalloproteinases and collagen damage in patients with dilated or ischemic cardiomyopathy?

Population

30 patients with dilated cardiomyopathy (DCM, n=14) or ischemic cardiomyopathy (ICM, n=16) requiring left ventricular assist device (LVAD) implantation and subsequent cardiac transplantation

Intervention

Left ventricular assist device (LVAD) support

Comparator

Baseline (LV samples collected at the time of LVAD implantation)

Outcome

Levels of matrix metalloproteinases (MMP-1, -2, -3, -9), tissue inhibitors of metalloproteinases (TIMP-1, -2, -3, -4), and collagen fractions (total soluble, insoluble, undenatured)surrogate

Mechanical unloading with an LVAD reduces MMP activity and diminishes matrix damage, which may contribute to functional recovery and LV plasticity in the failing heart.

Discussion

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Implication

LVAD unloading was associated with reduced MMP activity and less collagen damage; hypothesis-generating for matrix remodeling in advanced HF.

Cite This Study

Li et al. (2001) studied this question.

synapsesocial.com/papers/6a1bc16f27b545b111a8f2dc https://doi.org/10.1161/hc3501.095215

Topics

Mechanical circulatory support Heart failure HFrEF treatment

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Implication

LVAD unloading was associated with reduced MMP activity and less collagen damage; hypothesis-generating for matrix remodeling in advanced HF.

Downregulation of Matrix Metalloproteinases and Reduction in Collagen Damage in the Failing Human Heart After Support With Left Ventricular Assist Devices

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Topics

Downregulation of Matrix Metalloproteinases and Reduction in Collagen Damage in the Failing Human Heart After Support With Left Ventricular Assist Devices

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Topics

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