What question did this study set out to answer?

To determine whether myosin heavy chain and regulatory light chain isoform transitions in atrial myocardium are coordinately regulated under pathological pressure overload and regression.

March 1, 1993Cardiovascular Research

Correlated expression of atrial myosin heavy chain and regulatory light chain isoforms with pressure overload hypertrophy in the non-human primate

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Why the study?

Does experimentally induced renal hypertension alter the expression of myosin heavy chain and light chain isoforms in the atrial myocardium of baboons?

Population

35 adult baboons, including normal normotensive baboons, baboons with experimentally induced renal…

Comparison

Experimentally induced renal hypertension vs Normotensive baboons

Design

Preclinical

Authors

RHRichard D. HenkelCenters for Disease Control and Prevention CKCandace M. KammererInstitut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement LELauren EscobedoUniversity School

Discussion

Member takes

Implication

Supports coordinated myosin isoform regulation in primate pressure overload; hypothesis-generating for human atrial remodeling.

Key Points

To determine whether myosin heavy chain and regulatory light chain isoform transitions in atrial myocardium are coordinately regulated under pathological pressure overload and regression.
Examined atrial myocardial tissue from 35 adult baboons, including normotensive controls, animals with experimentally induced renal hypertension and left ventricular hypertrophy, and animals with regressed hypertrophy.
Quantified the distributions of myosin heavy chain (MHC) and regulatory myosin light chain (MLC2) isoforms using denaturing electrophoresis and laser densitometry.
A significant positive correlation occurred between MHC and MLC2 isoform ratios across atrial myocardium samples (r = 0.73, p < 0.001, n = 69), specifically linking alpha-MHC to atrial MLC2 and beta-MHC to ventricular MLC2.
Baboons with renal hypertension (n = 12) showed significantly higher left atrial levels of beta-MHC and ventricular MLC2 than normotensive controls (n = 15, p = 0.006), while animals with regressed hypertrophy exhibited intermediate levels.

Structured PICO

Does experimentally induced renal hypertension alter the expression of myosin heavy chain and light chain isoforms in the atrial myocardium of baboons?

Population

35 adult baboons, including normal normotensive baboons (n=15), baboons with experimentally induced renal hypertension and myocardial hypertrophy (n=12), and baboons with regressed hypertrophy

Intervention

Experimentally induced renal hypertension (pressure overload hypertrophy)

Comparator

Normotensive baboons

Outcome

Quantitative distributions and correlation of myosin heavy chain (MHC) and regulatory myosin light chain (MLC2) isoforms in atrial myocardiumsurrogate

There is tight coupling between the expression of myosin subunit isoforms under pathological conditions such as pressure overload hypertrophy in non-human primates.

Cite This Study

Henkel et al. (1993) studied this question.

synapsesocial.com/papers/6a87c6d08a3f93fc1e062175 https://doi.org/10.1093/cvr/27.3.416

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Correlated expression of atrial myosin heavy chain and regulatory light chain isoforms with pressure overload hypertrophy in the non-human primate

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Correlated expression of atrial myosin heavy chain and regulatory light chain isoforms with pressure overload hypertrophy in the non-human primate

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider