leukoplakia/glutationa

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Glutathione S-transferase M1 and T1 null genotypes as risk factors for oral leukoplakia in ethnic Indian betel quid/tobacco chewers.

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Oral cancer is the most common cancer in males and third most common in females in India, the main causative agent being the use of chewing tobacco with or without betel quid (BQ). However, nothing is known about the role of the host metabolic genes in oral cancer in ethnic Indian population. In

Immunolocalization of p53, glutathione S-tranferase pi and CD57 antigens in oral leukoplakia.

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OBJECTIVE The purpose of the present study was to evaluate the relationship between histological epithelial dysplasia, the immunolocalization of p53 and glutathione S-transferase pi on the immunolocalization of the CD57 antigen. METHODS Seventy biopsies were included in the study and the

Prevalence of glutathione S-transferase M1 null polymorphism in tobacco users, oral leukoplakia and oral squamous cell carcinoma patients in South Indian population: A polymerase chain reaction study.

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BACKGROUND Tobacco abuse is a well-known risk factor for potentially malignant disorders as well as oral squamous cell carcinoma (SCC). Factors that influence tobacco-exposed individuals developing a malignancy may include a combination of total tobacco exposure and genetic

Glutathione S-transferase M3 (A/A) genotype as a risk factor for oral cancer and leukoplakia among Indian tobacco smokers.

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Polymorphism in glutathione S-transferase (GST) genes, causing variations in enzyme activities, may influence susceptibility to oral cancer and leukoplakia in smokers and/or smokeless tobacco users. In this case-control study consisting of 109 leukoplakia and 256 oral cancer patients and 259

Associations Among Glutathione S-Transferase T1, M1, and P1 Polymorphisms and the Risk of Oral Leukoplakia.

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OBJECTIVE The potential association between glutathione S-transferase (GST) M1, T1, P1 polymorphisms and the risk of oral leukoplakia (OLK) has been extensively studied. However, the results of previous studies have been contradictory. In an effort to resolve these different findings we performed a

Evaluation of Genetic Polymorphisms in Glutathione S-Transferase Theta1, Glutathione S-Transferase Mu1, and Glutathione S-Transferase Mu3 in Oral Leukoplakia and Oral Squamous Cell Carcinoma with Deleterious Habits using Polymerase Chain Reaction.

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BACKGROUND Oral squamous cell carcinoma (OSCC) is the sixth most common cancer in the world. As per previous studies, most patients who develop oral cancer are elderly males who are heavy users of tobacco and alcohol; however, the incidence is increasing in younger individuals and in those who

Estimation of superoxide dismutase and glutathione peroxidase in oral submucous fibrosis, oral leukoplakia and oral cancer--a comparative study.

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Present study was undertaken to estimate and compare erythrocyte superoxide dismutase (E-SOD) and Glutathione peroxidase (GPx) levels in oral submucous fibrosis, oral leukoplakia and oral cancer patients and age/sex matched healthy subjects, 25 in each group. Statistically significant (P<0.001)

Plasma zinc antioxidant vitamins, glutathione levels and total antioxidant activity in oral leukoplakia.

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BACKGROUND Leukoplakia is a common, potentially premalignant lesion with malignant transformation rate from 1 to 17% with highest transformation rate for the lesions on the floor of the mouth, soft palate and tongue. One of the main etiological factors is consuming areca nut and its commercial

Evaluation of salivary and serum lipid peroxidation, and glutathione in oral leukoplakia and oral squamous cell carcinoma.

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Lipid peroxidation induced by reactive oxygen species (ROS) is involved in the pathogenesis of malignancy. Overall, lipid peroxidation levels are indicated by malondialdehyde (MDA), which is the most frequently used biomarker to detect oxidative changes. Antioxidant defense systems such as

Immunohistochemical demonstration of epithelial glutathione S-transferase isoenzymes in normal, benign, premalignant and malignant human oral mucosa.

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The expression and localization of glutathione S-transferase (GST) isoenzymes in the epithelium of normal oral mucosa (n = 9), overlying reactive fibrous hyperplasia (n = 9), and of potentially malignant [leukoplakia (n = 25), submucous fibrosis (n = 12), verrucous hyperplasia (n = 16)] and

Genetic polymorphisms of carcinogen metabolizing enzymes are associated with oral leukoplakia development and p53 overexpression.

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BACKGROUND Genetic polymorphisms of carcinogen-metabolizing enzyme genes have been associated with the risk of oral squamous cell carcinoma and oral leukoplakia. The overexpression of p53 protein is the most common genetic alteration in head and neck cancer. In the present study the combined or

GSTM1 null polymorphism prevalence in tobacco users, oral leukoplakia and oral squamous cell carcinoma patients in South Indian population: A polymerase chain reaction study.

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BACKGROUND Tobacco abuse is a well-known risk factor for potentially malignant disorders as well as oral squamous cell carcinoma. Factors that influence tobacco-exposed individuals developing a malignancy may include the combination of total tobacco exposure and genetic

Peroxiredoxin 1 suppresses apoptosis via regulation of the apoptosis signal-regulating kinase 1 signaling pathway in human oral leukoplakia.

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Peroxiredoxin 1 (Prx1) has a significant role in several malignant types of tumor. However, the role of Prx1 in oral leukoplakia (OLK) has remained to be elucidated. OLK is a common precancerous lesion of the oral mucosa that has a very high malignant transformation rate. The aim of the present

Oxidant-antioxidant status in tissue samples of oral leukoplakia.

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BACKGROUND Imbalances between the oxidant-antioxidant status have been implicated in the pathogenesis of several diseases, including oral cancer. Majority of oral cancer are preceded by a well-recognized group of pre-malignant lesions. However, only a small fraction of those lesions, undergo

Inhibition of oral carcinogenesis by glutathione.

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Forty young adult Syrian hamsters (Mesocricetus auratus) were divided into four groups of 10 animals each. In Group 1 (tumor control), the right buccal pouches were painted three times per week with a 0.5% solution of 7,12-dimethylbenz[a]anthracene (DMBA) in heavy mineral oil (USP) with a no. 4

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