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A brief morning rest period benefits cardiac repair in pressure overload hypertrophy and postmyocardial infarction
Cristine J. Reitz, … , W. Glen Pyle, Tami A. Martino
Cristine J. Reitz, … , W. Glen Pyle, Tami A. Martino
Published October 18, 2022
Citation Information: JCI Insight. 2022;7(22):e164700. https://doi.org/10.1172/jci.insight.164700.
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Research Article Cardiology

A brief morning rest period benefits cardiac repair in pressure overload hypertrophy and postmyocardial infarction

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Abstract

Rest has long been considered beneficial to patient healing; however, remarkably, there are no evidence-based experimental models determining how it benefits disease outcomes. Here, we created an experimental rest model in mice that briefly extends the morning rest period. We found in 2 major cardiovascular disease conditions (cardiac hypertrophy, myocardial infarction) that imposing a short, extended period of morning rest each day limited cardiac remodeling compared with controls. Mechanistically, rest mitigates autonomic-mediated hemodynamic stress on the cardiovascular system, relaxes myofilament contractility, and attenuates cardiac remodeling genes, consistent with the benefits on cardiac structure and function. These same rest-responsive gene pathways underlie the pathophysiology of many major human cardiovascular conditions, as demonstrated by interrogating open-source transcriptomic data; thus, patients with other conditions may also benefit from a morning rest period in a similar manner. Our findings implicate rest as a key driver of physiology, creating a potentially new field — as broad and important as diet, sleep, or exercise — and provide a strong rationale for investigation of rest-based therapy for major clinical diseases.

Authors

Cristine J. Reitz, Mina Rasouli, Faisal J. Alibhai, Tarak N. Khatua, W. Glen Pyle, Tami A. Martino

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Figure 2

Rest benefits outcomes in ischemic heart disease.

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Rest benefits outcomes in ischemic heart disease.
(A) Rest model and myo...
(A) Rest model and myocardial infarction (MI) experimental design. (B) Representative M-mode echocardiography at 8 weeks after MI, showing (C) smaller LVIDd and LVIDs and better % EF and % FS in mice under the rest model. n = 10 mice/group. (D) Representative histopathology, (E) close-up of infarct region, and (F) quantification of LV diameter and infarction expansion and integrity in MI+Rest hearts at 8 weeks after MI. n = 5 mice/group. *P < 0.05 and ***P < 0.001, unpaired Student’s t test.

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