What question did this study set out to answer?

To characterize transverse T-tubule structural alterations during the non-failing phase of human hypertrophic cardiomyopathy and assess their contribution to impaired excitation-contraction coupling.

November 22, 2020Journal of Muscle Research and Cell MotilityOpen Access

T-tubule remodeling in human hypertrophic cardiomyopathy

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Why the study?

While T-tubule architecture and function are well described in animal models, limited morpho-functional data exist on T-tubules in human myocardium and during the non-failing hypertrophic stage of HCM.

Key Points

To characterize transverse T-tubule structural alterations during the non-failing phase of human hypertrophic cardiomyopathy and assess their contribution to impaired excitation-contraction coupling.
Narrative review synthesizing morphological and functional ultrastructural data from human surgical septal myectomy samples.
Compared pathological changes observed in human tissue to cellular alterations produced by experimentally induced acute detubulation.
Assessed correlations between patient genotypes, T-tubule structural integrity, and clinical disease progression.
T-tubule disruption occurs during the compensated, non-failing hypertrophic stage of human disease, prior to the onset of end-stage heart failure.
Structural remodeling in myectomy tissue mimics the consequences of acute detubulation, directly destabilizing normal excitation-contraction coupling.
Rare forms of hypertrophic cardiomyopathy linked to mutations in membrane-stabilizing proteins point to primary, genotype-driven T-tubule remodeling.

Structured PICO

Population

Human hypertrophic cardiomyopathy (HCM) patients, specifically focusing on the non-failing hypertrophic stage and data from human myectomy samples.

This review provides insights into the ultrastructural remodeling of T-tubules in human hypertrophic cardiomyopathy and its implications for disease progression and excitation-contraction coupling.

Authors

GVGiulia VitaleUniversity of Florence RCRaffaele CoppiniElectrophysiology CTChiara TesiIstituto di Fisiologia Clinica

Discussion

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Implication

Limited human T-tubule data in HCM leaves open their role in excitation-contraction uncoupling; targeted morpho-functional studies needed.

Cite This Study

Vitale et al. (2020) studied this question.

synapsesocial.com/papers/6a76a8f92ea07b97ffadf3dd https://doi.org/10.1007/s10974-020-09591-6

Topics

Hypertrophic cardiomyopathy

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Implication

Limited human T-tubule data in HCM leaves open their role in excitation-contraction uncoupling; targeted morpho-functional studies needed.

T-tubule remodeling in human hypertrophic cardiomyopathy

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Topics

T-tubule remodeling in human hypertrophic cardiomyopathy

Key Points

Structured PICO

Discussion

Implication

Cite This Study

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Topics

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