hypoxanthine/سرطان الثدي

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Hypoxanthine Phosphoribosyl Transferase 1 Is Upregulated, Predicts Clinical Outcome and Controls Gene Expression in Breast Cancer

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Hypoxanthine phosphoribosyl transferase 1 (HPRT1) is traditionally believed to be a housekeeping gene; however, recent reports suggest that it is upregulated in several cancers and is associated with clinical outcomes. HPRT1 is located on chromosome X and encodes the HPRT enzyme, which

Hypoxanthine transport in human tumour cell lines: relationship to the inhibition of hypoxanthine rescue by dipyridamole.

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Hypoxanthine (HPX) uptake was investigated in four human tumour cell lines previously characterised as being sensitive (ds: A549 and MCF7) or insensitive (di: COR-L23 and T-47D) to dipyridamole (DP)-induced inhibition of HPX rescue from antipurine antifolate-induced growth inhibition. The aim of the

Identification and Evaluation of Bioactivity of Compounds from the Mushroom Pleurotus nebrodensis (Agaricomycetes) against Breast Cancer.

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Breast cancer affects millions of women annually worldwide and is the leading cause of cancer death in women. Various bioactive phytochemicals based on natural products are considered to be an important source of chemopreventive agents. In this study we report-to our knowledge for the first time-9

Optimal schedule of methotrexate and 5-fluorouracil in human breast cancer.

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We have shown previously that methotrexate pretreatment of murine leukemia and human colon carcinoma cell cultures results in augmented intracellular accumulation of 5-fluorouracil metabolites. Both of these drugs are commonly used for the treatment of women with breast cancer; thus, sequencing of

Association of invasion-promoting tenascin-C additional domains with breast cancers in young women.

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BACKGROUND Tenascin-C (TNC) is a large extracellular matrix glycoprotein that shows prominent stromal expression in many solid tumours. The profile of isoforms expressed differs between cancers and normal breast, with the two additional domains AD1 and AD2 considered to be tumour associated. The aim

SLFN5 influences proliferation and apoptosis by upregulating PTEN transcription via ZEB1 and inhibits the purine metabolic pathway in breast cancer

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Human Schlafen-5 (SLFN5) is aberrantly involved in tumorigenesis in several types of cancer. However, its implications in breast cancer (BRCA) are unknown. Herein, we demonstrated that SLFN5 expression is negatively associated with the tumour growth of human BRCA using GEO database analysis and

Effect of Human Fat Graft on Breast Cancer Metastasis in a Murine Model.

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BACKGROUND Isolated adipose stem cells have been reported to encourage migration and early metastasis of breast cancer. Mimicking a surgical situation, the authors developed a human breast cancer model to evaluate in vivo whether human adipose tissue promotes tumor growth and invasion. METHODS Human

The presence of single nucleotide instability in human breast cancer cell lines.

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The presence of single nucleotide instability, an increase of spontaneous point mutation rates (MR: number of mutations per cell division) without microsatellite instability, was demonstrated previously in two rat mammary carcinoma cell lines. In this study, spontaneous point MRs were analyzed in

Reactive oxygen species derived from xanthine oxidase interrupt dimerization of breast cancer resistance protein, resulting in suppression of uric acid excretion to the intestinal lumen.

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The prevalence of hyperuricemia/gout increases with aging. However, the effect of aging on function for excretion of uric acid to out of the body has not been clarified. We found that ileal uric acid clearance in middle-aged rats (11-12 months) was decreased compared with that in young rats (2

Down-regulation of reduced folate carrier gene (RFC1) expression after exposure to methotrexate in ZR-75-1 breast cancer cells.

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Methotrexate (MTX) is administered in intervals of one week or longer in the treatment of cancer and autoimmune disease. Early studies suggested that daily MTX administration was associated with decreased effectiveness and increased toxicity, leading to schedules of administration that include

Epidemiological and biochemical support for a theory on the cause and prevention of breast cancer.

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Damage to the breast epithelium by chemical carcinogens as products of oxygen free radical release can lead to fibroblast proliferation, hyperplasia of epithelium, cellular atypia and breast cancer. Chemical carcinogens may accumulate in breast fluid in the non-lactating breast consequent to

Identification of Selective Lead Compounds for Treatment of High-Ploidy Breast Cancer.

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Increased ploidy is common in tumors but treatments for tumors with excess chromosome sets are not available. Here, we characterize high-ploidy breast cancers and identify potential anticancer compounds selective for the high-ploidy state. Among 354 human breast cancers, 10% have mean chromosome

Plasma metabolites as possible biomarkers for diagnosis of breast cancer.

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Metabolomic approaches have been used to identify new diagnostic biomarkers for various types of cancers, including breast cancer. In this study, we aimed to identify potential biomarkers of breast cancer using plasma metabolic profiling. Furthermore, we analyzed whether these biomarkers had

Synaptonemal Complex Protein 3 Transcript Analysis in Breast Cancer.

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BACKGROUND Breast cancer is the most frequent cancer in women. Cancer/Testis antigens are immunogenic proteins ectopically expressed in human neoplasms. Synaptonemal complex protein 3 (SYCP3) belongs to cancer/testis genes family involved in meiotic events and spermatogenesis. The aim of this study

Proteomic profiling reveals that resveratrol inhibits HSP27 expression and sensitizes breast cancer cells to doxorubicin therapy.

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The use of chemopreventive natural compounds represents a promising strategy in the search for novel therapeutic agents in cancer. Resveratrol (3,4',5-trans-trihydroxystilbilene) is a dietary polyphenol found in fruits, vegetables and medicinal plants that exhibits chemopreventive and antitumor

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