BACKGROUND: The role of melusin, a necessary component in pressure-induced left-ventricular hypertrophy (LVH) in mice, has not yet been determined in human cardiac hypertrophy. We analyzed for the first time the expression and regional distribution of melusin in human LVH due to aortic stenosis (AS) and determined AKT phosphorylation as a potential downstream effector of melusin signalling. METHODS: Regional distribution of melusin was evaluated in four normal hearts. Melusin staining, gene expression and protein content were assessed in biopsies from normal and diseased hearts and melusin gene expression was correlated with LV functional changes. The pAKT/AKT ratio was determined in parallel and correlated with melusin protein content. RESULTS: In normal hearts, melusin was found in the myocytes with a uniform regional distribution. Melusin staining, mRNA and protein were significantly decreased in human AS hearts. The reduction in melusin mRNA was significantly correlated with LVEF, LVEDD and LVESD. pAKT/AKT ratio was significantly decreased in human AS and was correlated with melusin content. CONCLUSION: Reduction in melusin expression parallels the functional cardiac impairment in human AS. The simultaneous decrease of melusin and AKT phosphorylation suggests a connection between the loss of melusin and the decrease in systolic function.

Altered melusin expression in the hearts of aortic stenosis patients

BRANCACCIO, Mara;ACCORNERO, FEDERICA;TARONE, Guido;
2007

Abstract

BACKGROUND: The role of melusin, a necessary component in pressure-induced left-ventricular hypertrophy (LVH) in mice, has not yet been determined in human cardiac hypertrophy. We analyzed for the first time the expression and regional distribution of melusin in human LVH due to aortic stenosis (AS) and determined AKT phosphorylation as a potential downstream effector of melusin signalling. METHODS: Regional distribution of melusin was evaluated in four normal hearts. Melusin staining, gene expression and protein content were assessed in biopsies from normal and diseased hearts and melusin gene expression was correlated with LV functional changes. The pAKT/AKT ratio was determined in parallel and correlated with melusin protein content. RESULTS: In normal hearts, melusin was found in the myocytes with a uniform regional distribution. Melusin staining, mRNA and protein were significantly decreased in human AS hearts. The reduction in melusin mRNA was significantly correlated with LVEF, LVEDD and LVESD. pAKT/AKT ratio was significantly decreased in human AS and was correlated with melusin content. CONCLUSION: Reduction in melusin expression parallels the functional cardiac impairment in human AS. The simultaneous decrease of melusin and AKT phosphorylation suggests a connection between the loss of melusin and the decrease in systolic function.
9(6-7)
568
573
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6VS9-4NM5SJ1-1-9&_cdi=6257&_user=525216&_orig=search&_coverDate=07%2F31%2F2007&_sk=999909993&view=c&wchp=dGLbVlb-zSkzk&md5=cf1443850fe34772e7d6df1fb06b4e56&ie=/sdarticle.pdf
Melusin; Aortic stenosis; Hypertrophy; Gene expression; Proteinkinase B/AKT
BROKAT S; THOMAS J; HERDA LR; KNOSALLA C; PREGLA R; BRANCACCIO M; ACCORNERO F; TARONE G; HETZER R; REGITZ-ZAGROSEK V
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/36592
Citazioni
  • ???jsp.display-item.citation.pmc??? 7
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 14
social impact