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thymine/càncer de mama
L'enllaç es desa al porta-retalls
Pàgina 1 des de 58 resultats
Preliminary observation of 99mTc-thymine imaging in breast neoplasms.
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New biological knowledge and new diagnostic tools for breast cancer diagnosis may have an important impact on the strategies followed by oncologists in breast cancer management. So far, it has not been possible to label a nucleotide or its precursor with technetium-99m (99mTc) for use in in vivo
99mTc-thymine scintigraphy may be a promising method in the diagnosis of breast cancer.
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OBJECTIVE
Mammography has been established as the gold standard for the detection of breast cancer, and imaging techniques such as ultrasonography, magnetic resonance imaging, scintigraphy and positron emission tomography may be useful to improve its sensitivity and specificity. The objective of
The angiogenic factor thymidine phosphorylase up-regulates the cell adhesion molecule P-selectin in human vascular endothelial cells and is associated with P-selectin expression in breast cancers.
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Thymidine phosphorylase (TP) is an angiogenic enzyme, catalysing the reversible phosphorylation of thymidine to thymine and 2-deoxyribose. TP is up-regulated in neoplasia, being associated with advanced tumour stage, microvessel density and prognosis in several tumour types. Although TP is a
The mismatch repair gene hPMS2 is mutated in primary breast cancer.
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Mismatch repair (MMR) genes play a fundamental role in the correction of replication errors and their mutation leads to cancer development. In the present study we have analyzed the hPMS2 MMR gene for mutation using 20 primary breast cancers and seven breast tissues obtained from areas adjacent to
The frequency of CpG and non-CpG methylation of Notch3 gene promoter determines its expression levels in breast cancer cells.
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Notch3 can act as a tumor suppressor in the breast cancer epithelial cells. Unfortunately, Notch3 expression is decreased or lost, especially in triple-negative breast cancer (TNBC) cells, and the reasons remain unclear. Here, we found Notch3 was upregulated in MDA-MB-231 cells with 5-Aza treatment.
Levels of 5-hydroxymethyl-2'-deoxyuridine in DNA from blood as a marker of breast cancer.
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BACKGROUND
Oxidative DNA damage can result from numerous endogenous metabolic processes as well as from exposure to environmental and dietary oxidants. One important type of oxidative DNA damage is the formation of hydroxylated DNA bases. This type of DNA damage may have a role in
Oestradiol is effective in stimulating 3H-thymidine incorporation but not on proliferation of breast cancer cultured cells.
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The growth of numerous human oestrogen target cell lines is said to have been stimulated by oestradiol. We studied the action of this hormone on the growth of two human cancer cell lines originating from endometrium (GUS), and from breast (FAM). Oestradiol was inactive on endometrial cell
[Demonstration of pyrimidine nucleoside phosphorylases in breast cancer].
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Two pyrimidine phosphorylase activities have been isolated from the cytosol of cultivated MCF-7 cells of a human breast cancer, by ion exchange chromatography. Both enzymes are responsible for the cleavage of thymidine into thymine and deoxyribose-1-phosphate, for the synthesis of thymidine and for
Methylation of conserved CpG sites neighboring the beta retinoic acid response element may mediate retinoic acid receptor beta gene silencing in MCF-7 breast cancer cells.
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We investigated the mechanism of retinoic acid receptor (RAR) beta2 gene silencing in breast cancer cells. Transfection experiments indicated that MCF-7 cells transactivate an exogenous beta2 promoter (-1470/+156) to the same extent as MTSV1.7 breast epithelial cells, which express endogenous
The transcription factor CBFB mutations indicate an improved survival in HR+/HER2- breast cancer
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Background: As a critical transcription factor, CBFB (core binding factor subunit β) is frequently mutated in breast cancer and considered to be of significance in the pathogenesis of cancer. The objective of this study was to investigate
miR-29b is an indicator of prognosis in breast cancer patients.
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MicroRNA-29b (miR-29b) targets numerous important genes that mediate carcinogenesis and tumor development in breast cancer in vitro and in vivo. The aim of the present study was to determine the clinical significance of miR-29b expression in primary breast cancer patients. Reverse
Recruitment for a pilot case control study of oxidative DNA damage and breast cancer risk.
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Oxidative DNA damage (ODD) can result from numerous endogenous metabolic processes as well as from exposure to environmental and dietary oxidants. One important type of ODD that may have a role in carcinogenesis is the formation of hydroxylated DNA bases. Our major purpose was to determine the
Effects of estradiol and tamoxifen on proliferation of human breast cancer cells and human endometrial cells.
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The effects of estradiol and tamoxifen on the proliferation of estrogen receptor positive cells and the relationship between the tamoxifen tolerance and cell origin were investigated. The tissues of human endometrium and breast cancer were randomly selected following dissection for primary cell
Genome-wide analysis and modeling of DNA methylation susceptibility in 30 breast cancer cell lines by using CpG flanking sequences.
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DNA methylation is an epigenetic modification of DNA that adds a methyl group to cytosine. Aberrant DNA methylation in the CpG context is frequently observed in cancer cells and it is known that aberrant DNA methylation silences tumor repressor genes. However, the mechanism of DNA methylation is not
Association between the lengths of GT dinucleotide repeat in the PIK3CA gene with breast cancer risk.
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The phosphatidylinositol 3-kinase (PI3 K)/Akt signaling pathway is one of the most commonly mutated pathways in breast cancer. To date, there has been no study on polymorphism of phosphatidylinositol-3,4-bisphosphonate 3-kinase, catalytic subunit alpha (PIK3CA) gene microsatellites and their link
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