hypertrophy/tyrosine

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Patterns of tyrosine phosphorylation differ in vascular hypertrophy and hyperplasia.

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Vascular smooth muscle cells (VSMC) undergo hypertrophy when exposed to thromboxane A2 and hyperplasia when exposed to phorbol 12-myristate 13-acetate (PMA) or platelet-derived growth factor (PDGF). Each of these three agonists stimulate rapid tyrosine phosphorylation of numerous VSMC proteins. The

Ca(2+)-sensitive tyrosine kinase Pyk2/CAK beta-dependent signaling is essential for G-protein-coupled receptor agonist-induced hypertrophy.

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G-protein-coupled receptor agonists including endothelin-1 (ET-1) and phenylephrine (PE) induce hypertrophy in neonatal ventricular cardiomyocytes. Others and we previously reported that Rac1 signaling pathway plays an important role in this agonist-induced cardiomyocyte hypertrophy. In this study

Enlargement of secretory vesicles by protein tyrosine phosphatase PTP-MEG2 in rat basophilic leukemia mast cells and Jurkat T cells.

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Stimulus-induced secretion of bioactive polypeptides is a fundamental aspect of the immune system. Secretory proteins are synthesized in the endoplasmic reticulum and are transported through the Golgi apparatus to the trans-Golgi network, where they are sorted into transport vesicles that bud off

Cardiac hypertrophy in the Dahl rat is associated with increased tyrosine phosphorylation of several cytosolic proteins, including a 120 kDa protein.

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Because of the well established role that tyrosine phosphorylation (tyr phos) plays in growth factor signalling and regulating cell growth, we hypothesized that cardiac hypertrophy might be associated with altered tyr phos of certain cellular proteins in the heart. Furthermore, we hypothesized that

Tyrosines-740/751 of PDGFRβ contribute to the activation of Akt/Hif1α/TGFβ nexus to drive high glucose-induced glomerular mesangial cell hypertrophy.

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Glomerular mesangial cell hypertrophy contributes to the complications of diabetic nephropathy. The mechanism by which high glucose induces mesangial cell hypertrophy is poorly understood. Here we explored the role of the platelet-derived growth factor receptor-β (PDGFRβ) tyrosine kinase in driving

The tyrosine kinase inhibitor, genistein, prevents alpha-adrenergic-induced cardiac muscle cell hypertrophy by inhibiting activation of the Ras-MAP kinase signaling pathway.

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The alpha-adrenergic agonist, phenylephrine, has been widely used to induce hypertrophy in cultured ventricular myocytes from neonatal rats. We have investigated the role of tyrosine phosphorylation in this signaling pathway using the tyrosine kinase inhibitor, genistein. We find that genistein

Involvement of receptor-type tyrosine kinase gene families in cardiac hypertrophy.

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OBJECTIVE The activation of protein tyrosine kinases (PTKs) has been postulated to be involved in cell differentiation and proliferation. To elucidate the involvement of tyrosine kinase genes in normal and pathological conditions, we analysed the expression patterns of receptor-type PTKs in the

TH01, a tetrameric short tandem repeat locus in the tyrosine hydroxylase gene: association with myocardial hypertrophy and death from myocardial infarction?

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TH01 is a tetrameric short tandem repeat locus located in intron 01 of the tyrosine hydroxylase gene. The tyrosine hydroxylase catalyzes the hydroxylation of L-tyrosine to L-DOPA and is the rate limiting enzyme in the synthesis of catecholamines like noradrenaline or adrenaline, which are pivotal in

Nox4 NAD(P)H oxidase mediates Src-dependent tyrosine phosphorylation of PDK-1 in response to angiotensin II: role in mesangial cell hypertrophy and fibronectin expression.

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Activation of glomerular mesangial cells (MCs) by angiotensin II (Ang II) leads to hypertrophy and extracellular matrix accumulation. Here, we demonstrate that, in MCs, Ang II induces an increase in PDK-1 (3-phosphoinositide-dependent protein kinase-1) kinase activity that required its

Loss of Bmx nonreceptor tyrosine kinase prevents pressure overload-induced cardiac hypertrophy.

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Bmx nonreceptor tyrosine kinase has an established role in endothelial and lymphocyte signaling; however, its role in the heart is unknown. To determine whether Bmx participates in cardiac growth, we subjected mice deficient in the molecule (Bmx knockout mice) to transverse aortic constriction

Endothelial Bmx tyrosine kinase activity is essential for myocardial hypertrophy and remodeling.

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Cardiac hypertrophy accompanies many forms of heart disease, including ischemic disease, hypertension, heart failure, and valvular disease, and it is a strong predictor of increased cardiovascular morbidity and mortality. Deletion of bone marrow kinase in chromosome X (Bmx), an arterial nonreceptor

Urotensin II induces rat cardiomyocyte hypertrophy via the transient oxidization of Src homology 2-containing tyrosine phosphatase and transactivation of epidermal growth factor receptor.

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Urotensin II (U-II) is implicated in cardiomyocyte hypertrophy, which results in cardiac remodeling. We recently demonstrated that both reactive oxygen species (ROS) generation and epidermal growth factor receptor (EGFR) transactivation play critical roles in U-II signal transduction. However, the

Tyrosine phosphorylation of RACK1 triggers cardiomyocyte hypertrophy by regulating the interaction between p300 and GATA4.

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The zinc finger protein GATA4 is a transcription factor involved in cardiomyocyte hypertrophy. It forms a functional complex with the intrinsic histone acetyltransferase (HAT) p300. The HAT activity of p300 is required for the acetylation and transcriptional activity of GATA4, as well as for

cAbl tyrosine kinase mediates reactive oxygen species- and caveolin-dependent AT1 receptor signaling in vascular smooth muscle: role in vascular hypertrophy.

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Important output signals of the angiotensin subtype 1 receptor (AT1R) in vascular smooth muscle cells (VSMCs) are mediated by angiotensin II (Ang II)-stimulated transactivation of the epidermal growth factor receptor (EGF-R), which is critical for vascular hypertrophy. Ang II-induced EGF-R

Hypertrophy and dietary tyrosine ameliorate the phenotypes of a mouse model of severe nemaline myopathy.

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Nemaline myopathy, the most common congenital myopathy, is caused by mutations in genes encoding thin filament and thin filament-associated proteins in skeletal muscles. Severely affected patients fail to survive beyond the first year of life due to severe muscle weakness. There are no specific

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Herbal & Natural Medicine

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