stomatitis/نقص الأكسجة

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Radioprotective Effects of Dermatan Sulfate in a Preclinical Model of Oral Mucositis-Targeting Inflammation, Hypoxia and Junction Proteins without Stimulating Proliferation.

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Oral mucositis is the most frequently occurring early side effect of head-and-neck cancer radiotherapy. Systemic dermatan sulfate (DS) treatment revealed a significant radioprotective potential in a preclinical model of oral mucositis. This study was initiated to elucidate the mechanistic effects of

Loss of VHL confers hypoxia-inducible factor (HIF)-dependent resistance to vesicular stomatitis virus: role of HIF in antiviral response.

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Hypoxia-inducible factor (HIF) is a central regulator of cellular responses to hypoxia, and under normal oxygen tension the catalytic alpha subunit of HIF is targeted for ubiquitin-mediated destruction via the VHL-containing E3 ubiquitin ligase complex. Principally known for its association with

Spatio-temporal localization of HIF-1alpha and COX-2 during irradiation-induced oral mucositis in a rat model system.

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OBJECTIVE Oral mucositis is a common side effect of radiotherapy for head and neck cancer. The purpose of this study was to examine the significance of and the relationship between hypoxia inducible factor-1alpha (HIF-1alpha) and cyclooxygenase-2 (COX-2) gene expression and the corresponding protein

Local hypoxia in oral mucosa (mouse) during daily fractionated irradiation - Effect of pentoxifylline.

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OBJECTIVE A significant reduction of radiation-induced oral mucositis by systemic application of pentoxifylline has been demonstrated in a mouse tongue model. However, the underlying mechanisms remain unclear. The present study focuses on the development of local hypoxia in mouse tongue during daily

Hypoxia enhances the antiviral activity of interferons.

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WISH and Hep-2 cells were incubated in an environment with atmospheric oxygen (20% O2, approximately 140 mmHg partial pressure), and under hypoxic conditions (2% O2, approximately 14 mmHg). The oxygen tension greatly affected the metabolism of the cells and their response to interferon-alpha

Vesicular stomatitis virus is a potent agent for the treatment of malignant ascites.

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Cancer cells in ascites are usually exposed to a hypoxia tumor microenvironment and utilize enhanced glycolysis which produces energy and metabolizes nutrients to support proliferation. Vesicular stomatitis virus (VSV) is an oncolytic virus that relies on the host cellular metabolism for

Replication and cytopathic effect of oncolytic vesicular stomatitis virus in hypoxic tumor cells in vitro and in vivo.

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Tumor hypoxia presents an obstacle to the effectiveness of most antitumor therapies, including treatment with oncolytic viruses. In particular, an oncolytic virus must be resistant to the inhibition of DNA, RNA, and protein synthesis that occurs during hypoxic stress. Here we show that vesicular

A new topical vasoconstrictor-based strategy for prevention of oral mucositis.

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OBJECTIVE In a new strategy, we sought to determine whether vasoconstriction and transient hypoxia of the mucosa during irradiation would prevent or suppress radiation-induced oral mucositis. METHODS Topical vasoconstrictor was applied once to the oral cavity; 20 minutes later hamsters or mice

Vesicular stomatitis virus oncolytic treatment interferes with tumor-associated dendritic cell functions and abrogates tumor antigen presentation.

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Oncolytic virotherapy is a promising biological approach to cancer treatment that contributes to tumor eradication via immune- and non-immune-mediated mechanisms. One of the remaining challenges for these experimental therapies is the necessity to develop a durable adaptive immune response against

Three-dimensional spheroid culture of human gingiva-derived mesenchymal stem cells enhances mitigation of chemotherapy-induced oral mucositis.

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Mesenchymal stem cells (MSCs) are capable of regenerative and immunomodulatory functions in cell-based therapies in a variety of human diseases and injuries; however, their therapeutic efficacy and potential side effects remain major obstacles in clinical applications. We report here a 3D spheroid

Low-Level Laser Therapy Promoted Aggressive Proliferation and Angiogenesis Through Decreasing of Transforming Growth Factor-β1 and Increasing of Akt/Hypoxia Inducible Factor-1α in Anaplastic Thyroid Cancer.

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OBJECTIVE We assessed the cause of increased tumor after low-level laser therapy (LLLT) by histological analysis. BACKGROUND LLLT is a nonthermal phototherapy used in several medical applications, including wound healing, reduction of pain, and amelioration of oral mucositis. We discovered by

Phase I study of evofosfamide, an investigational hypoxia-activated prodrug, in patients with advanced leukemia.

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Tumor hypoxia causes resistance to radiation and chemotherapy. Evofosfamide (TH-302) has exhibited specific hypoxia-dependent cytotoxicity against primary acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML) samples in vitro. Based on these findings, a Phase I study of evofosfamide

Toxicosis associated with ingestion of quick-dissolve granulated chlorine in a dog.

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METHODS A dog was referred for treatment after ingestion of quick-dissolve chlorine granules intended for use in a swimming pool. RESULTS At evaluation 18 hours after ingestion of the granules, the dog had tachypnea, signs of depression, approximately 5% dehydration, oral mucositis, and a productive

Clinical trial experience with temsirolimus in patients with advanced renal cell carcinoma.

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Clinical trials have validated the importance of mammalian target of rapamycin (mTOR) as a therapeutic target in patients with advanced renal cell carcinoma (RCC). The TORC1 complex controls translation of key proteins involved in cell proliferation and regulates the expression and stability of

Identification of synthetic endothelial cell-specific promoters by use of a high-throughput screen.

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Transcriptional targeting is a desirable property for many gene transfer applications. Because endothelial cells line most blood vessels, they are attractive candidates for the introduction of therapeutic gene products. As a proof-of-concept study, we attempted to identify a synthetic, endothelial

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