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Immunohistochemical expression of glutathione S-transferase placental type (GST-pi), a detoxifying enzyme, in normal arachnoid villi and meningiomas.

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Human normal dura mater containing arachnoid villi were examined for their expression of glutathione S-transferase placental type (GST-pi), a detoxifying enzyme, using an immunohistochemical method. All of the arachnoid villi and arachnoid cells in five normal cases were found to have expression of

Immunohistochemical study of glutathione S-transferase-pi in meningiomas.

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Immunostaining for glutathione S-transferase-pi was investigated in various subtypes of meningioma for the purpose of biological characterization. Specimens included five normal meninges and 25 meningiomas (10 meningothelial type, 6 fibrous type, 5 transitional type, 3 microcystic type, and 1

Detection of elevated glutathione in meningiomas by quantitative in vivo 1H MRS.

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Glutathione has major roles in removing free radicals and toxins from normal tissues, but its presence in tumor cells hinders the effectiveness of many anticancer therapies. Analysis of short echo time brain tumor (1)H spectra at 1.5 T using a linear combination of metabolite spectra (LCModel)

(1)H MR Spectroscopy of Meningiomas at 3.0T: the Role of Glutamate-Glutamine Complex and Glutathione.

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Proton magnetic resonance spectroscopy ((1)H MRS) has been used extensively for the characterization of the intracranial meningiomas. A major emphasis is placed on identification of an alanine (Ala) content within these tumors. Less attention is given to other metabolites such as glutamine and

Glutathione peroxidase, glutathione reductase and protein oxidation in patients with glioblastoma multiforme and transitional meningioma.

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OBJECTIVE The aim of this study was to assess glutathione peroxidase (GPx), glutathione reductase (GRx) and protein oxidation (POx) levels in patients with glioblastoma multiforme (GBM) and transitional meningioma (TM) and to compare with normal brain tissues. METHODS GPx, GRx and POx levels were

Susceptibility to astrocytoma and meningioma: influence of allelism at glutathione S-transferase (GSTT1 and GSTM1) and cytochrome P-450 (CYP2D6) loci.

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We describe a case-control study to identify associations between polymorphism at the cytochrome P-450 (CYP2D6) and glutathione S-transferase (GSTT1 and GSTM1) loci and susceptibility to astrocytoma and meningioma. Accordingly, genotype frequencies in 112 astrocytoma and 50 meningioma patients were

Quantitative analysis of glutathione in human brain tumors.

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Reduced glutathione (gamma-glutamylcysteinylglycine, GSH) plays an important role in the protection of cells against damage from free radicals and other electrophils and also influences cellular radiosensitivity, cellular response to hyperthermia, and cytotoxicity to some kinds of chemotherapeutic

Benign and atypical meningioma metabolic signatures by high-resolution magic-angle spinning molecular profiling.

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Meningiomas are neoplasms that arise from the leptomeningeal covering of the brain and spinal cord, accounting for 15%-20% of CNS tumors. The WHO classifies meningiomas into three histological grades: benign, atypical, and anaplasic in accordance with the clinical prognosis. Atypical and anaplasic

Technetium-99m-d,1-hexamethylpropyleneamine oxime (HMPAO) uptake and glutathione content in brain tumors.

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Technetium-d, HMPAO SPECT was performed in 70 patients suffering from intracerebral tumors of various histologic types (glioma n = 30, meningioma n = 19, metastases n = 10, angioma n = 3, neuroma n = 2, lymphoma n = 2, neurocytoma n = 1, epidermoid n = 1, gliosis n = 1, cholesteatoma n = 1). Tumor

Adenylate kinase activity and glutathione concentration of cerebrospinal fluid in different neurological disorders.

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Adenylate kinase activity and glutathione concentration were measured in cerebrospinal fluid (CSF) of 64 consecutive patients admitted for various neurological disorders. These two analyses were performed in addition to conventional examination of the CSF. Neurological symptoms most probably

Differential diagnosis of intracranial meningiomas based on magnetic resonance spectroscopy.

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OBJECTIVE To determine in vivo magnetic resonance spectroscopy (MRS) characteristics of intracranial meningiomas and to assess MRS reliability in meningioma grading and discrimination from tumours of similar radiological appearance, such as lymphomas, schwannomas and

Microarray Expression Data Identify DCC as a Candidate Gene for Early Meningioma Progression.

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Meningiomas are the most common primary brain tumors bearing in a minority of cases an aggressive phenotype. Although meningiomas are stratified according to their histology and clinical behavior, the underlying molecular genetics predicting aggressiveness are not thoroughly understood. We performed

Aberrant CpG island hypermethylation profile is associated with atypical and anaplastic meningiomas.

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Hypermethylation of promoter CpG islands is a common epigenetic event in a variety of human cancers. The aim of this study was to investigate whether promoter hypermethylation of cancer-related genes is involved in the development and progression of meningiomas. The methylation status at the

[Quantitative analysis of glutathione and glutathione S-transferase in human brain tumors, C6 rat glioma cells and drug resistant C6 cells].

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Glutathione (GSH) and Glutathione S-transferase (GST) plays an important role in the protection of cells against damage from free radicals and also influences cytotoxicity to some kinds of chemotherapeutic agents. GST comprises a group of abundant and widely distributed catalytic and binding

[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,

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