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Immunohistochemical detection of GLUT1, p63 and phosphorylated histone H1 in head and neck squamous intraepithelial neoplasia: evidence for aberrations in hypoxia-related, cell cycle- and stem-cell-regulatory pathways.

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OBJECTIVE Most epithelial malignancies are characterized by multistep progression from preinvasive/intraepithelial neoplasia to invasive malignancy. Detection and grading of early squamous intraepithelial neoplasia may at times be problematic. The aim of this study was to examine the ability of

Histone deacetylase inhibitors promote eNOS expression in vascular smooth muscle cells and suppress hypoxia-induced cell growth.

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Hypoxia stimulates excessive growth of vascular smooth muscle cells (VSMCs) contributing to vascular remodelling. Recent studies have shown that histone deacetylase inhibitors (HDIs) suppress VSMC proliferation and activate eNOS expression. However, the effects of HDI on hypoxia-induced VSMC growth

Pulmonary artery smooth muscle cell proliferation and migration in fetal lambs acclimatized to high-altitude long-term hypoxia: role of histone acetylation.

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High-altitude long-term hypoxia (LTH) is known to induce pulmonary arterial smooth muscle cell (PASMC) proliferation in the fetus, leading to pulmonary arterial remodeling and pulmonary hypertension of the newborn. The mechanisms underlying these conditions remain enigmatic however. We hypothesized

Histone H3K9 demethylase JMJD1A is a co-activator of erythropoietin expression under hypoxia.

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Erythropoietin (EPO) is a secreted hormone that stimulates the production of red blood cells, and the level of EPO is increased under hypoxia. The expression of EPO is regulated not only by the hypoxia-inducible factor (HIF) but also partly through epigenetic modifications, including histone

Hypoxia mimetic deferoxamine influences the expression of histone acetylation- and DNA methylation-associated genes in osteoblasts.

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OBJECTIVE Sufficient oxygen supply to bone tissue is essential for normal bone development and efficient bone repair. Hypoxia and hypoxia-inducible factor 1α (HIF1α) signaling pathway have been shown to exhibit profound effects on proliferation, differentiation as well as gene and protein expression

Defect of adaptation to hypoxia in patients with COPD due to reduction of histone deacetylase 7.

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BACKGROUND Hypoxia inducible factor (HIF)-1 plays an important role in cellular adaptation to hypoxia by activating oxygen-regulated genes such as vascular endothelial growth factor (VEGF) and erythropoietin. Sputum VEGF levels are reported to be decreased in COPD, despite hypoxia. Here we show that

Honokiol inhibits HIF pathway and hypoxia-induced expression of histone lysine demethylases.

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Hypoxia-inducible-factor (HIF)-mediated expression of pro-angiogenic genes under hypoxic conditions is the fundamental cause of pathological neovascularization in retinal ischemic diseases and cancers. Recent studies have shown that histone lysine demethylases (KDMs) play a key role in the

High methylation levels of histone H3 lysine 9 associated with activation of hypoxia-inducible factor 1α (HIF-1α) predict patients' worse prognosis in human hepatocellular carcinomas

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Although it is becoming increasingly apparent that histone methyltransferases and histone demethylases play crucial roles in the cellular response to hypoxia, the impact of hypoxic environments on global patterns of histone methylation is not well demonstrated. In this study, we try to detect the

Combination strategy targeting the hypoxia inducible factor-1 alpha with mammalian target of rapamycin and histone deacetylase inhibitors.

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OBJECTIVE The hypoxia-inducible factor-1 alpha (HIF-alpha) is a key regulator of tumor angiogenesis. Mammalian target of rapamycin (mTOR) and histone deacetylase (HDAC) inhibitors suppress tumor-induced angiogenesis by reducing tumor HIF-1 alpha protein expression. Thus, we hypothesized that

Inhibition of histone deacetylase attenuates hypoxia-induced migration and invasion of cancer cells via the restoration of RECK expression.

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Hypoxia is a strong signal for cell migration and invasion in cancer. The reversion-inducing cysteine-rich protein with Kazal motif (RECK), a tumor suppressor, inhibits cancer cell migration and invasion and is frequently silenced in aggressive tumor cells by histone deacetylases (HDAC). However,

c-Myc mediates a hypoxia-induced decrease in acetylated histone H4.

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Global acetylation of histone H4 is a mark of gene transcriptional activation. The c-Myc transcription factor binds to specific DNA sites in cellular chromatin and induces the acetylation of histone H4. In this study, hypoxia (1% Oxygen) induced a decrease in both global acetylated histone H4 (AcH4)

The S. pombe histone H2A dioxygenase Ofd2 regulates gene expression during hypoxia.

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Post-translational modification of histone proteins are known to play an important role in regulating chromatin structure. In an effort to find additional histone modifications we set out to screen enzymes of the 2-oxoglutarate and Fe(II)-dependent (2-OG-Fe(II)) dioxygenase family for activity

Hypoxia and hypoxia mimetics differentially modulate histone post-translational modifications

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Post-translational modifications (PTMs) to the tails of the core histone proteins are critically involved in epigenetic regulation. Hypoxia affects histone modifications by altering the activities of histone-modifying enzymes and the levels of hypoxia-inducible factor (HIF) isoforms. Synthetic

Histone demethylase JARID1B regulates proliferation and migration of pulmonary arterial smooth muscle cells in mice with chronic hypoxia-induced pulmonary hypertension via nuclear factor-kappa B (NFkB).

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Chronic hypoxia-induced pulmonary hypertension (PH) is a disorder that is characterized by increased pulmonary arterial pressure resulting from lung diseases or shortage of oxygen in the body. Excess proliferation of pulmonary vascular cells such as pulmonary artery endothelial cells (PAECs) and

Roles of histone deacetylation and AMP kinase in regulation of cardiomyocyte PGC-1α gene expression in hypoxia.

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The transcriptional coactivator peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) is a key determinant of cardiac metabolic function by regulating genes governing fatty acid oxidation and mitochondrial biogenesis. PGC-1α expression is reduced in many cardiac diseases, and gene

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