RT Journal Article
SR Electronic
T1 <em>Klf15</em> Deficiency Is a Molecular Link Between Heart Failure and Aortic Aneurysm Formation
JF Science Translational Medicine
FD American Association for the Advancement of Science
SP 26ra26
OP 26ra26
DO 10.1126/scitranslmed.3000502
VO 2
IS 26
A1 Haldar, Saptarsi M.
A1 Lu, Yuan
A1 Jeyaraj, Darwin
A1 Kawanami, Daiji
A1 Cui, Yingjie
A1 Eapen, Sam J.
A1 Hao, Caili
A1 Li, Yan
A1 Doughman, Yong-Qiu
A1 Watanabe, Michiko
A1 Shimizu, Koichi
A1 Kuivaniemi, Helena
A1 Sadoshima, Junichi
A1 Margulies, Kenneth B.
A1 Cappola, Thomas P.
A1 Jain, Mukesh K.
YR 2010
UL http://stm.sciencemag.org/content/2/26/26ra26.abstract
AB Current therapies for diseases of heart muscle (cardiomyopathy) and aorta (aortopathy) include inhibitors of the renin-angiotensin system, β-adrenergic antagonists, and the statin class of cholesterol-lowering agents. These therapies have limited efficacy, as adverse cardiovascular events continue to occur with some frequency in patients taking these drugs. Although cardiomyopathy and aortopathy can coexist in a number of conditions (for example, Marfan’s syndrome, acromegaly, pregnancy, and aging), pathogenetic molecular links between the two diseases remain poorly understood. We reasoned that identification of common molecular perturbations in these two tissues could point to therapies for both conditions. Here, we show that deficiency of the transcriptional regulator Kruppel-like factor 15 (Klf15) in mice leads to both heart failure and aortic aneurysm formation through a shared molecular mechanism. Klf15 concentrations are markedly reduced in failing human hearts and in human aortic aneurysm tissues. Mice deficient in Klf15 develop heart failure and aortic aneurysms in a p53-dependent and p300 acetyltransferase–dependent fashion. KLF15 activation inhibits p300-mediated acetylation of p53. Conversely, Klf15 deficiency leads to hyperacetylation of p53 in the heart and aorta, a finding that is recapitulated in human tissues. Finally, Klf15-deficient mice are rescued by p53 deletion or p300 inhibition. These findings highlight a molecular perturbation common to the pathobiology of heart failure and aortic aneurysm formation and suggest that manipulation of KLF15 function may be a productive approach to treat these morbid diseases. Copyright © 2010, American Association for the Advancement of Science