pancreatic neoplasms/نقص الأكسجة

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Attenuation of reactive oxygen species by antioxidants suppresses hypoxia-induced epithelial-mesenchymal transition and metastasis of pancreatic cancer cells.

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Hypoxia has been shown to promote metastasis of cancer cells through induction of epithelial-mesenchymal transition (EMT). It is also known to cause generation of reactive oxygen species (ROS). We investigated here the role of ROS in hypoxia-induced EMT and whether attenuation of ROS by antioxidants

Hypoxia promotes C-X-C chemokine receptor type 4 expression through microRNA-150 in pancreatic cancer cells.

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Hypoxia promotes pancreatic cancer progression by triggering cancer cell invasion. However, the mechanism underlying this process remains unclear, hindering the development of effective therapies. The present study aimed to delineate the molecular mechanisms underlying the prometastatic effect of

Selective killing of hypoxia-inducible factor-1-active cells improves survival in a mouse model of invasive and metastatic pancreatic cancer.

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OBJECTIVE Pancreatic cancer is characterized by intratumoral hypoxia, early and aggressive local invasion, and metastatic potential. Hypoxia-inducible factor-1 (HIF-1) is the major transcriptional activator of hypoxia-responsive genes and intratumoral hypoxia is associated with increased risk of

Propofol inhibits pancreatic cancer progress under hypoxia via ADAM8.

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To investigate the potential anti-tumoral properties of propofol in pancreatic cancer and elucidate the underlying mechanisms.The relative expression of ADAM metallopeptidase domain 8 (ADAM8) in response to hypoxia in Panc1 cells was analyzed by western

Chondroitin sulfate proteoglycan CSPG4 as a novel hypoxia-sensitive marker in pancreatic tumors.

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CSPG4 marks pericytes, undifferentiated precursors and tumor cells. We assessed whether the shed ectodomain of CSPG4 (sCSPG4) might circulate and reflect potential changes in CSPG4 tissue expression (pCSPG4) due to desmoplastic and malignant aberrations occurring in pancreatic tumors. Serum sCSPG4

Polymorphisms in the hypoxia-inducible factor-1α gene confer susceptibility to pancreatic cancer.

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The transcription factor hypoxia-inducible factor-1 (HIF-1) has α and β subunits. Recent studies have shown that the HIF-1α gene may have C1772T and G1790A single nucleotide polymorphisms (SNPs). These SNPs may increase the stability and activity of HIF-1α. In the present study, we looked for these

Cellular differentiation determines the expression of the hypoxia-inducible protein NDRG1 in pancreatic cancer.

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N-myc downstream-regulated gene-1 (NDRG1) is a recently described hypoxia-inducible protein that is upregulated in various human cancers. Pancreatic ductal adenocarcinoma, called pancreatic cancer, is a highly aggressive cancer that is characterised by its avascular structure, which results in a

Evaluating the Metabolic Impact of Hypoxia on Pancreatic Cancer Cells.

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Hypoxia is frequently observed in human cancers and induces global metabolic reprogramming that includes an increase in glucose uptake and glycolysis, alterations in NAD(P)H/NAD(P)+ and intracellular ATP levels, and increased utilization of glutamine as the major precursor for fatty acid synthesis.

Proliferating cell nuclear antigen, survivin, and CD34 expressions in pancreatic cancer and their correlation with hypoxia-inducible factor 1alpha.

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OBJECTIVE Hypoxia-inducible factor 1alpha (HIF-1alpha) has been universally detected in many types of cells and plays a key role in modulation of tumor-related genes. The purpose of this study was to explore the relationship between HIF-1alpha messenger RNA (mRNA) expression and biologic

Extracellular superoxide dismutase suppresses hypoxia-inducible factor-1α in pancreatic cancer.

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Hypoxia-inducible factor-1 (HIF-1) is a heterodimeric transcription factor that governs cellular responses to reduced oxygen availability by mediating crucial homeostatic processes and is a major survival determinant for tumor cells growing in a low-oxygen environment. Clinically, HIF-1α seems to be

Effect of low glutamine/glucose on hypoxia-induced elevation of hypoxia-inducible factor-1alpha in human pancreatic cancer MiaPaCa-2 and human prostatic cancer DU-145 cells.

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OBJECTIVE Tumor microenvironment is characterized by regions of fluctuating and chronic hypoxia, low extracellular pH, and nutrient depletion. Although it is well known that hypoxia stimulates the accumulation of hypoxia-inducible factor-1alpha (HIF-1alpha), the role of low extracellular pH and

Hypoxia-independent gene expression mediated by SOX9 promotes aggressive pancreatic tumor biology.

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Pancreatic cancer aggressiveness is characterized by its high capacity for local invasion, ability to promote angiogenesis, and potential to metastasize. Hypoxia is known to represent a crucial step in the development of aggressive malignant features of many human cancers. However, micrometastatic

Hypoxia and angiogenesis in pancreatic cancer.

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BACKGROUND Pancreatic cancer remains one of the most lethal of all solid tumours of the gastrointestinal tract. It is characterized by late diagnosis, aggressive local invasion, early metastasis and resistance to chemoradiotherapy. Increasing knowledge regarding the molecular events behind the

A nitroimidazole derivative, PR-350, enhances the killing of pancreatic cancer cells exposed to high-dose irradiation under hypoxia.

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The radiosensitizing effects of PR-350, a nitroimidazole derivative, were examined concerning the cell killing of human pancreatic cancer cell lines exposed to high doses of gamma-ray irradiation in vitro. The percentages of dead cells were analyzed with a multiwell plate reader to measure the

Identification of genes differentially induced by hypoxia in pancreatic cancer cells.

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A hypoxic microenvironment is characteristic of many solid tumors, including pancreatic cancer, the fifth leading cause of cancer death in the United States. Hypoxia causes the stabilization of the HIF-1 (hypoxia-inducible factor-1) transcription factor and the induction of many genes that promote

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