astrocytoma/نيكوتين

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11 النتائج

Expression of TRH and TRH-like peptides in a human glioblastoma-astrocytoma cell line (U-373-MG).

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The human glioblastoma-astrocytoma cell line U-373-MG shows morphological features typical of its neuroectodermal origin. Cells showed positive immunostaining for the glial fibrillary acidic protein. We used this cell culture for studying the putative production of TRH and TRH-related peptides. In a

Characterization of a multiple ligand-gated ion channel cellular membrane affinity chromatography column and identification of endogenously expressed receptors in astrocytoma cell lines.

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Cellular membranes obtained from the 1321N1 and A172 astrocytoma cell lines were immobilized on a chromatographic phase to create cellular membrane affinity chromatography (CMAC) columns, CMAC(1321N1) and CMAC(A172). The columns were characterized using frontal affinity chromatography with

Radiotherapy and temozolomide for newly diagnosed glioblastoma and anaplastic astrocytoma: validation of Radiation Therapy Oncology Group-Recursive Partitioning Analysis in the IMRT and temozolomide era.

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Since the development of the Radiation Therapy Oncology Group-Recursive Partitioning Analysis (RTOG-RPA) risk classes for high-grade glioma, radiation therapy in combination with temozolomide (TMZ) has become standard care. While this combination has improved survival, the prognosis remains poor in

Gestational and familial risk factors for childhood astrocytoma: results of a case-control study.

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Gestational and familial risk factors were investigated for their association with astrocytoma, the most frequently occurring brain tumor in children. A case-control study of 163 matched pairs was performed. Cases under 15 years of age at diagnosis in 1980-1986 were identified through the tumor

Polymorphism in glutathione S-transferase loci as a risk factor for common cancers.

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Though a developing body of data indicates polymorphism at GST genes influences cancer susceptibility, it is unclear why a genotype is associated with one cancer but not another. We believe the GST exert a critical role in normal cell house-keeping activities. GSTM1, GSTM3 and GSTT1 influence

[Glutathione S-transferases genetic polymorphisms and human diseases: overview of epidemiological studies].

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Glutathione S-transferases (GST), xenobiotic-metabolising enzymes, are involved in the metabolic detoxification of various environmental carcinogens. Particular genetic polymorphisms of these enzymes have been shown to influence individual susceptibility against various pathologies including cancer,

Glutathione S-transferase T1 and M1 gene defects in ovarian carcinoma.

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Glutathione S-transferases (GSTs) M1 and T1 are known to be polymorphic in humans. Both polymorphisms are due to gene deletions, which are responsible for the existence of null genotypes. The gene defect of GSTT1 has been reported to be associated with an increased risk of myelodysplastic syndromes,

Maternal smoking during pregnancy and the risk of childhood brain tumors: Results from a Swedish cohort study.

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BACKGROUND Tobacco metabolites and carcinogens can be found in placental and umbilical cord tissues of fetuses exposed to maternal smoking. However, studies regarding maternal smoking during pregnancy and childhood brain tumor (CBT) have shown inconsistent results. METHODS All children born in

Hypothalamic digoxin mediated model for oncogenesis.

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This study assessed the changes in the isoprenoid pathway and its metabolites digoxin, dolichol and ubiquinone in neoplasms (CNS astrocytomas - glioblastoma multiforme and high grade non - Hodgkin's lymphoma). The following parameters were assessed-isoprenoid pathway metabolites, tyrosine and

NTP Toxicology and Carcinogenesis Studies of Isoprene (CAS No. 78-79-5) in F344/N Rats (Inhalation Studies).

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Isoprene, the monomeric unit of natural rubber and naturally occurring terpenes and steroids, is primarily obtained as a by-product of naphtha cracking for ethylene production. It is emitted from plants and trees, has been detected in tobacco smoke and automobile exhaust, and was identified as a

Epidemiologic review of marijuana use and cancer risk.

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Marijuana is the most commonly used illegal drug in the United States and is considered by young adults to be the illicit drug with the least risk. On the other hand, marijuana smoke contains several of the same carcinogens and co-carcinogens as the tar from tobacco, raising concerns that smoking of

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