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Cell Physiol Biochem. 2010;26(3):395-402. doi: 10.1159/000320563. Epub 2010 Aug 24.

Ventricular remodeling induced by tissue vitamin A deficiency in rats.

Author information

1
Internal Medicine Department, Botucatu Medical School, UNESP - São Paulo State University, Botucatu, Brazil. paulasa@fmb.unesp.br

Abstract

BACKGROUND/AIMS:

Experimental studies suggest that vitamin A plays a role in regulating cardiac structure and function. We tested the hypothesis that cardiac vitamin A deficiency is associated with adverse myocardial remodeling in young adult rats.

METHODS:

Two groups of young female rats, control (C - n = 29) and tissue vitamin A deficient (RVA - n = 31), were subjected to transthoracic echocardiography exam, isolated rat heart study and biochemical study.

RESULTS:

The RVA rats showed a reduced total vitamin A concentration in both the liver and heart [vitamin A in heart, micromol/kg (C = 0.95 +/- 0.44 and RVA = 0.24 +/- 0.16, p = 0.01)] with the same serum retinol levels (C = 0.73 +/- 0.29 micromol/L e RVA = 0.62 +/- 0.17 micromol/L, p = 0.34). The RVA rats showed higher left ventricular diameters and reduced systolic function. The RVA rats also demonstrated increased lipid hydroperoxide/total antioxidant capacity ratio and cardiac levels of IFN-gamma and TNF-alpha but not of metalloproteinase (MMP)-2 and -9 activity. On the other hand, the RVA rats had decreased levels of beta-hydroxyacylcoenzyme A dehydrogenase and lactate dehydrogenase.

CONCLUSIONS:

Tissue vitamin A deficiency stimulated cardiac remodeling and ventricular dysfunction. Additionally, the data support the involvement of oxidative stress, energy metabolism, and cytokine production in this remodeling process.

PMID:
20798524
DOI:
10.1159/000320563
[Indexed for MEDLINE]
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