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March 26, 2010AJP Heart and Circulatory PhysiologyOpen Access

Effects of adiponectin deficiency on structural and metabolic remodeling in mice subjected to pressure overload

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Key result

In mice subjected to 6 weeks of pressure overload, adiponectin deficiency prevented left ventricular chamber dilation and preserved systolic function and mitochondrial oxidative capacity compared to wild-type mice.

Why the study?

Does adiponectin deletion prevent adverse left ventricular remodeling and metabolic deterioration in mice subjected to prolonged pressure overload?

Population

Wild-type and adiponectin mice subjected to pressure overload via transverse aortic constriction

Comparison

Adiponectin deletion (adiponectin mice)… vs Wild-type mice subjected to prolonged transverse…

Design

Preclinical

Follow-up

6 weeks

Authors

KOKaren M. O’SheaDCDavid J. ChessRKRamzi J. Khairallah

Discussion

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Member takes

Overview

Adiponectin deletion may attenuate remodeling in pressure-overload mice; hypothesis-generating for human HF and should not change practice.

Structured PICO

Does adiponectin deletion prevent adverse left ventricular remodeling and metabolic deterioration in mice subjected to prolonged pressure overload?

P
Population
Male wild-type and adiponectin-deficient mice, aged 8 weeks, subjected to transverse aortic constriction to evaluate cardiac remodeling over 6 weeks.
E
Exposure
Adiponectin deletion (adiponectin(-/-) mice) subjected to prolonged transverse aortic constriction (TAC)
C
Comparator
Wild-type (WT) mice subjected to prolonged transverse aortic constriction (TAC)
O
Outcome
Left ventricular (LV) hypertrophy, LV remodeling (chamber size, end diastolic and systolic volumes, ejection fraction), and mitochondrial oxidative capacitysurrogate

Main Result

p-value: p=<0.05

Adiponectin deletion in mice subjected to prolonged pressure overload prevents LV chamber dilation and preserves mitochondrial oxidative capacity, suggesting adiponectin plays a permissive role in adverse cardiac remodeling.

Limitations

  • Did not track progression to heart failure at earlier or later time points beyond 6 weeks.
  • Did not measure matrix metalloproteinase (MMP) activity levels by zymography.
  • Did not assess potential differences in apoptosis between the two strains.

Cite This Study

O’Shea et al. (2010) studied Pressure overload-induced cardiac hypertrophy. Adiponectin deficiency vs. Wild-type mice was evaluated on Left ventricular remodeling and systolic function (end diastolic volume, end systolic volume, and ejection fraction) (p=<0.05). In mice subjected to 6 weeks of pressure overload, adiponectin deficiency prevented left ventricular chamber dilation and preserved systolic function and mitochondrial oxidative capacity compared to wild-type mice.

synapsesocial.com/papers/6a484dd1a567c8cbc92f7dbehttps://doi.org/10.1152/ajpheart.00957.2009
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Exacerbation of heart failure in adiponectin-deficient mice due to impaired regulation of AMPK and glucose metabolism2005 · 236 citations
  2. 2Downregulation of survival signalling pathways and increased apoptosis in the transition of pressure overload‐induced cardiac hypertrophy to heart failure2009 · 79 citations
  3. 3Minimally invasive aortic banding in mice: effects of altered cardiomyocyte insulin signaling during pressure overload2003 · 244 citations
  4. 4Matrix Metalloproteinases2002 · 728 citations
  5. 5Apoptotic and non-apoptotic programmed cardiomyocyte death in ventricular remodelling2008 · 309 citations