Fine-Tuning Cardiac Insulin-Like Growth Factor 1 Receptor Signaling to Promote Health and Longevity
Background:
The insulin-like growth factor 1 (IGF1) pathway is a key regulator of cellular metabolism and aging. Although its inhibition promotes longevity across species, the effect of attenuated IGF1 signaling on cardiac aging remains controversial.
Methods:
We performed a lifelong study to assess cardiac health and lifespan in 2 cardiomyocyte-specific transgenic mouse models with enhanced versus reduced IGF1 receptor (IGF1R) signaling. Male mice with human IGF1R overexpression or dominant negative phosphoinositide 3-kinase mutation were examined at different life stages by echocardiography, invasive hemodynamics, and treadmill coupled to indirect calorimetry. In vitro assays included cardiac histology, mitochondrial respiration, ATP synthesis, autophagic flux, and targeted metabolome profiling, and immunoblots of key IGF1R downstream targets in mouse and human explanted failing and nonfailing hearts, as well.
Results:
Young mice with increased IGF1R signaling exhibited superior cardiac function that progressively declined with aging in an accelerated fashion compared with wild-type animals, resulting in heart failure and a reduced lifespan. In contrast, mice with low cardiac IGF1R signaling exhibited inferior cardiac function early in life, but superior cardiac performance during aging, and increased maximum lifespan, as well. Mechanistically, the late-life detrimental effects of IGF1R activation correlated with suppressed autophagic flux and impaired oxidative phosphorylation in the heart. Low IGF1R activity consistently improved myocardial bioenergetics and function of the aging heart in an autophagy-dependent manner. In humans, failing hearts, but not those with compensated hypertrophy, displayed exaggerated IGF1R expression and signaling activity.
Conclusions:
Our findings indicate that the relationship between IGF1R signaling and cardiac health is not linear, but rather biphasic. Hence, pharmacological inhibitors of the IGF1 pathway, albeit unsuitable for young individuals, might be worth considering in older adults.
Top-30
Journals
|
1
2
3
4
|
|
|
European Heart Journal
4 publications, 4.71%
|
|
|
Circulation
3 publications, 3.53%
|
|
|
Frontiers in Cardiovascular Medicine
3 publications, 3.53%
|
|
|
Scientific Reports
3 publications, 3.53%
|
|
|
European Journal of Heart Failure
3 publications, 3.53%
|
|
|
The Journal of Cardiovascular Aging
3 publications, 3.53%
|
|
|
Cardiovascular Research
3 publications, 3.53%
|
|
|
Expert Opinion on Therapeutic Targets
2 publications, 2.35%
|
|
|
Frontiers in Cell and Developmental Biology
2 publications, 2.35%
|
|
|
Journal of the American Heart Association
2 publications, 2.35%
|
|
|
Ageing Research Reviews
2 publications, 2.35%
|
|
|
Biomedicines
2 publications, 2.35%
|
|
|
Journal of the American College of Cardiology
2 publications, 2.35%
|
|
|
eLife
2 publications, 2.35%
|
|
|
Nature Aging
1 publication, 1.18%
|
|
|
Cells
1 publication, 1.18%
|
|
|
Cell
1 publication, 1.18%
|
|
|
Cell Metabolism
1 publication, 1.18%
|
|
|
Signal Transduction and Targeted Therapy
1 publication, 1.18%
|
|
|
Nature Reviews Cardiology
1 publication, 1.18%
|
|
|
Autophagy
1 publication, 1.18%
|
|
|
Aging Cell
1 publication, 1.18%
|
|
|
Research square
1 publication, 1.18%
|
|
|
Aquaculture Reports
1 publication, 1.18%
|
|
|
Molecular Metabolism
1 publication, 1.18%
|
|
|
bioRxiv
1 publication, 1.18%
|
|
|
Canadian Journal of Cardiology
1 publication, 1.18%
|
|
|
JACC: Heart Failure
1 publication, 1.18%
|
|
|
Science Translational Medicine
1 publication, 1.18%
|
|
|
1
2
3
4
|
Publishers
|
5
10
15
20
25
|
|
|
Elsevier
22 publications, 25.88%
|
|
|
Springer Nature
11 publications, 12.94%
|
|
|
Oxford University Press
8 publications, 9.41%
|
|
|
Wiley
8 publications, 9.41%
|
|
|
MDPI
6 publications, 7.06%
|
|
|
Ovid Technologies (Wolters Kluwer Health)
5 publications, 5.88%
|
|
|
Frontiers Media S.A.
5 publications, 5.88%
|
|
|
Taylor & Francis
4 publications, 4.71%
|
|
|
Cold Spring Harbor Laboratory
4 publications, 4.71%
|
|
|
OAE Publishing Inc.
3 publications, 3.53%
|
|
|
eLife Sciences Publications
2 publications, 2.35%
|
|
|
American Association for the Advancement of Science (AAAS)
1 publication, 1.18%
|
|
|
American Physiological Society
1 publication, 1.18%
|
|
|
Arterialnaya Gipertenziya
1 publication, 1.18%
|
|
|
American Society for Microbiology
1 publication, 1.18%
|
|
|
5
10
15
20
25
|
- We do not take into account publications without a DOI.
- Statistics recalculated weekly.