title: [Nuclear changes and p62 expression in ischemic and dilated cardiomyopathy].
abstract: The study's objectives were to investigate nuclear stereology and to determine the level of p62, a protein involved in nuclear transport, in human cardiomyocytes from patients with heart failure due to ischemic cardiomyopathy (ICM) or dilated cardiomyopathy (DCM). We studied 23 human hearts: 10 had ICM, 10 had DCM, and three were from control subjects. The size of the nucleus was significantly increased in ICM and DCM hearts compared with those from controls (by 60% and 66%, respectively, P=.03), as was the size of the nucleolus (by 59%, P=.02 and 75%, P=.03, respectively). In addition, the p62 level was significantly increased in both forms of cardiomyopathy compared with controls (ICM 110%, P=.01; and DCM 145%, P=.04). In the ICM group, there were correlations between the p62 level and nuclear size (r=0.615, P=.05) and between the p62 level and the heterochromatin percentage (r=-0.707; P=.02). In conclusion, cardiomyocytes from hearts affected by ICM and DCM showed changes in nuclear and nucleolar morphology. The p62 level had doubled in both forms of cardiomyopathy and, in ICM hearts, there was a correlation with nuclear changes.
authors: Unidad de Cardiología, Centro de Investigación, Hospital Universitario La Fe, Valencia, España.
authors: Raquel
authors: R
authors: Cortés
authors: Manuel
authors: M
authors: Portolés
authors: Esther
authors: E
authors: Roselló-Lletí
authors: Luis
authors: L
authors: Martínez-Dolz
authors: Luis
authors: L
authors: Almenar
authors: Antonio
authors: A
authors: Salvador
authors: Miguel
authors: M
authors: Rivera
mesh_terms: D002311:Cardiomyopathy, Dilated / Q000378:metabolism / Q000473:pathology*; D002466:Cell Nucleolus / Q000473:pathology / Q000648:ultrastructure; D002467:Cell Nucleus / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure; D003430:Cross-Sectional Studies; D006333:Heart Failure / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D008297:Male; D008562:Membrane Glycoproteins / Q000032:analysis*; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000378:metabolism / Q000473:pathology*; D032383:Myocytes, Cardiac / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure; D028861:Nuclear Pore Complex Proteins
chemical_list: D008562:Membrane Glycoproteins; D028861:Nuclear Pore Complex Proteins; C049312:nuclear pore protein p62