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DJ-1 protein and human heart

Agnese Petrera, Ursula Kern, Dominik Linz, Alejandro Gomez-Auli, Mathias Hohl, Johann Gassenhuber, Thorsten Sadowski, Oliver Schilling
Cathepsin A (CTSA) is a lysosomal carboxypeptidase present at the cell surface and secreted outside the cell. Additionally, CTSA binds to β-galactosidase and neuraminidase 1 to protect them from degradation. CTSA has gained attention as a drug target for the treatment of cardiac hypertrophy and heart failure. Here, we investigated the impact of CTSA on the murine cardiac proteome in a mouse model of cardiomyocyte-specific human CTSA overexpression using liquid chromatography-tandem mass spectrometry in conjunction with an isotopic dimethyl labeling strategy...
September 2, 2016: Journal of Proteome Research
Filio Billia, Ludger Hauck, Daniela Grothe, Filip Konecny, Vivek Rao, Raymond H Kim, Tak W Mak
Oxidative stress is caused by an imbalance between the production of reactive oxygen species (ROS) and the ability of an organism to eliminate these toxic intermediates. Although the Parkinson-susceptibility gene, Parkinson protein 7/DJ-1 (DJ-1), has been linked to the regulation of oxidative stress, the exact mechanism by which this occurs and its in vivo relevance have remained elusive. In the heart, oxidative stress is a major contributor to the development of heart failure (HF). Therefore, we hypothesized that DJ-1 inhibits the pathological consequences of ROS production in the heart, the organ with the highest oxidative burden...
April 9, 2013: Proceedings of the National Academy of Sciences of the United States of America
Jelena Klawitter, Jost Klawitter, Erika Agardi, Kyler Corby, Dieter Leibfritz, Brian D Lowes, Uwe Christians, Tamas Seres
AIMS: Dilated cardiomyopathies from chronic ischaemia (ISCM) or idiopathic (IDCM) pathological mechanisms are accompanied by similar clinical symptoms but may differ in protein expression, cell metabolism, and signalling processes at the cellular level. Using a combination of proteomic and metabolomic profiling, we sought to decipher the relationships between the metabolism and cellular signalling pathways in human heart tissues collected from patients with ISCM, IDCM, and those without heart disease and dilation...
January 1, 2013: Cardiovascular Research
Id Jayasinghe, Dj Crossman, C Soeller, Mb Cannell
1. It is apparent from the literature that there are significant differences in excitation-contraction coupling between species, particularly in the density of calcium transporting proteins in the t-system and sarcoplasmic reticulum (SR) Ca(2+) release channels. Unfortunately, there is a lack of information as to how the principal structures that link electrical excitation to the activation of calcium-induced calcium release (CICR) are different between human and animal models (particularly rat). 2. Comparison of wheat germ agglutinin and caveolin-3 labelling revealed a non-uniform distribution of surface membrane glycosylation in the rat, rabbit and human, and that the rat t-system appeared more complex in geometry than the latter species...
May 2012: Clinical and Experimental Pharmacology & Physiology
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