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Item Análise epidemiológica, molecular e citogenética do câncer de hipofaringe em Goiânia(Universidade Federal de Goiás, 2006-09-29) Costa, Cesar Augusto Sam Tiago Vilanova; Cruz, Aparecido Divino da; http://lattes.cnpq.br/7868817504129985Hypo pharynx is the under region of pharynx and serves both respiratory and digestive tract, acting as a passageway to air and food. It’s composed by squamous nonkeratinized epithelial tissue. Statistical studies indicates that 85 to 90% of neoplasies rush pyriform sinus and are characterized by fast dissemination and metastization. Epidemiological trends of hypo pharynx cancer in Goiania on period 1998 to 2003 analyzing data derived from Cancer Registry of Association for Cancer Combat of Goias, shows that the relative survival rate for men diagnosed with hypo pharynx cancer was 38% past 60 months while women presented a survival rate of 100%. Surgery was the treatments that present fewer rates (34%) and chemotherapy was associated to the most survival rate (54%). Patients that use tobacco presented a survival rate of 43% while non-tabagists present a rate of 60% of surviving. Relative survival rate for patients diagnosed with hypo pharynx tumor was 38% and estimated censure for 5 years was just 5%. Survival rate was extremely decreased due to 45% of cases were diagnosed in advanced stages of disease. It is important to point out that preventive campaign is important to evade the increasing of these pathologies that are related to behavior of tabagism and etilism. Present study also evaluates cytogenetically individuals diagnosed with hypo pharynx cancer. Cytogenetic analysis of exfoliated cells is largely used to evaluate cytotoxic and genotoxic alterations on people exposed to potentially mutagens. A number of 36 individuals were analyzed, representing case group, and 36 healthy individuals composed control group. Data was collected and analysis was performed to estimate main nuclear alterations. Standard protocols were adopted to collect and counting cells. Micronuclei test was used to determinate the frequency of cytotoxic and genotoxic alterations. Besides than micronuclei others alterations like broken-eggs, binucleated cells and piknotic nuclei are good markers of cell alterations because they are resulted from cytotoxic events frequently related to occupational exposure. Behaviors like tabagism, etilism and exposition time were also investigated to correlate cells alterations. The correlation between micronuclei frequencies of case and control group test doesn’t show statistic difference. Broken egg and binucleated cells were the most observed anomalies on case group and showed up significant statistic difference (p=0.03). Results indicates a high grade of cytotoxic anomalies on individuals with hypo pharynx cancer, specially in tabagists and chronic etilists individuals, behaviors that are correlated to induct and promote tumors in susceptible people due their capabilities to affect cell cycle. Studies about relationship between Human Papillomavirus (HPV) and cancer development are performed since 80’s. Although the correlation of HPV and cervical cancer are well established, the possible role of HPV and head and neck cancer are still unclear. Among controversial factors of HPV and carcinogenesis of squamous epithelial cells, there is a viral incidence that oscillates from 0 to almost 100% on studies that includes a myriad of viral genome detect methods, such Blotting and PCR. Importance of HPV infection and epithelial carcinogenesis is related to capabilities of High risk HPV 16 and 18 to promote cell alterations, by tumor suppressor proteins inactivation, tumor suppressor genes blockage and insertions of HPV oncogenes. On present study, HPV detection and typing was performed on tumors derived from hypo pharynx of 24 patients diagnosed with cancer (CID-O: C12,0 to C13,9). All samples was submitted to PCR with generic primers MY09/11 and GP05/06, as specific primers to HPV 6, 11, 16, 18, 33, 35, 45 and 58. Results shows that on 9 of 24 samples, HPV were detected by generic primers (a rate of 37,5%) and HPV types 16, 18 and 45 were identified, with a sample presenting coinfection of HPV 16 and 18.Item Implicações do polimorfismo genético de cyp1a1, gstm1 e gstt1 na suscetibilidade do carcinoma espinocelular da laringe(Universidade Federal de Goiás, 2008-05-30) Silva Junior, Raimundo Lima da; Cruz, Aparecido Divino da; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793956J0The larynx is a tubular organ of the aerodigestive tract whose main function is the production of voice, in addition to tasks related to the protection of the lower airways and swallowing food. The squamous cell carcinoma presents itself as a multifactorial disease and epigenetic being influenced by environmental factors, behavioural and relate to the individual. Several polymorphic genes that encode enzymes involved in the biotransformation of the carcinogens have been associated to the development of cancer, especially in squamous cell carcinoma of head and neck. The CYP1A1m, GSTM1 and GSTT1 genes which catalyzes the oxidation of PAHs in phenolic and epoxides products. The purpose of this study was to evaluate the epidemiological data of patients diagnosed with squamous cell carcinoma of the larynx from the Cancer Registry of Population basis of Goiânia and from Association of Cancer Combat in Goiânia, analyzing data from 63 medical records followed in a period of 6 year; establish the allelic profiles of the gene CYP1A1m, GSTM1 and GSTT1 in casecontrol groups investigating the degrees of suscetibility of patients diagnosed with squamous cell carcinoma (SCC) of the larynx, according to smoking and alcoholism habits. In total 112 samples were evaluated, 63 from patients with SCC of the larynx and 49 patients in the control group. The CEC of the larynx was about 3,5 times more frequent in men than in women. The rate of survival on general was approximately 66% to 6 years. The smoking and ethilic habits associated have a significantly lower survival. No significant differences were found in the staging analysis and treatment of patients. Were found allelic frequencies of CYP1A1m1 of 52,4% (34/62) and 63,3% (31/49) for the wild allele T and 44,4% (28/62) and 34,7% (18/49) for the mutant allele C. There were no statistically significant associations between allelic variants and genotypic CYP1A1m1 with squamous cell carcinoma of the larynx. Positive genotypic frequencies were observed for the genes GSTM1 and GSTT1 of 41.3% (26/63) and 54.0% (34/63) to the patients with laryngeal cancer, and 49,0% (24/49) and 51,0% (25/49) for the control group, respectively. For the assessment of genotype GSTM1 (null) and GSTT1 (null), the patients if the case group had 58,7% (37/63) and 46,0% (29/63) of genotypes for GSTM1 null and GSTT1, while the patients in the control group showed 51,0% (25/49) and 40,8% (20/49). There was no statistically significance in associations of genotypic variants GSTM1 (null) and GSTT1 (null) with the larynx squamous cell carcinoma. In this context, an experimental study was accomplished in the intention of evaluating the function of the genes Cyp and Gst in the metabolism of the Cyclophosphamide. This study addressed the Cyclophosphamide toxicological evaluation and analysis of the polymorphism of Cyp2a29 and Gstp1 BALB/c genes in mice, correlating them with the toxicity of drugs through the assessment of organs commonly affected. It was determinated the DL50 of the 474mg/kg. Subsequently, another 40 mice were used on the assessment of the genetic polymorphism of genes Cyp2a29 and Gstp1. As for toxicity, cyclophosphamide caused reduction in body weight at different doses and kidneys, spleen, liver, heart and lungs. The animals that received a dose of 500mg/Kg died in 24 hours, three animals with a dose of 250mg/Kg died the end of one week. The evaluation of toxicity showed changes of varying degrees of congestion observed in the spleen, liver and heart. There were not found statistically significant differences between the frequencies of allelic and genotypic to Cyp2a29 and Gstp1 in groups of animals studied. This observation should be probably the characteristic line BALB/c are isogenic. Studies that make the use se of tests of genetic suscetibility, epidemic evaluation, combined to the evaluation anatomopathological they allow the study of the interaction genetic atmosphere and a possible standardization of various chemotherapy protocols for treatment.