ABSTRACT
The p53 tumor suppressor gene is a 16-20-kb section of cellular DNA located on the short arm of human chromosome 17 at position 17 P 13.1. Allelic deletions and/or point mutations in p53 gene are now known to be associated with the development of carcinogenesis. A hallmark of p53 is that both alleles are generally altered during transformation, which usually represents a loss of heterozygosity (LOH). In this study 30 normal dental students and 22 oral cancer patients were collected from the affiliated hospital of Chung Shan Medical and Dental College, Taichung, Taiwan. Extractions of DNA from the buccal mucosa or cancer surface were sampled by cytology brush. The two polymorphic restriction sites exon 4 and intron 6 within the p53 gene were amplified with polymerase chain reactions followed by restriction fragment length polymorphism assay. In heterozygous individuals, 66% of oral cancers demonstrated loss of p53 gene heterozygosity at the exon 4 site, and 50% showed LOH at the intron 6 site. These results indicate that inactivation of p53 gene is associated with development and/or progression of oral cancer. The essential advantages of oral exfoliative cytology are the non-invasiveness, painlessness, rapidity, ease and cost-effectiveness of cell sampling and DNA extraction. Furthermore, this experimental assay might be useful for preliminary screening of carcinogenesis in human beings.
Subject(s)
Carcinoma, Squamous Cell/genetics , Genes, p53/genetics , Loss of Heterozygosity , Mouth Neoplasms/genetics , DNA, Neoplasm/analysis , Heterozygote , Homozygote , Humans , Polymerase Chain Reaction/methodsABSTRACT
The chronic disease usually can not be cured well but controlling by the daily care activity, regular diagnosis and dosage under the physician's instructions. In this research, we propose a community medical care monitoring model for monitoring and managing the chronic patients of community through the WWW (World Wide Web) service network and/or telephone voice service network. It can collect more patients' physiological data measured at home or community health agent. Therefore, the chronic disease patients will be getting better cure from his doctor's diagnosis due to the patient's effort.
Subject(s)
Chronic Disease/therapy , Community Medicine/organization & administration , Computer Systems , Patient Care Management/methods , Female , Humans , Male , Medical Records Systems, ComputerizedABSTRACT
Para o conhecimento do estado de poluicao bacteriologica dos rios Anil e Bacanga, Estado do Maranhao (Brasil), coletaram-se amostras de agua em 5 pontos, no Rio Anil, e 3 pontos, no Rio Bacanga, mensalmente, durante 12 meses, nas fases enchente e vazante da mare. Foram determinados numeros de bacterias totais/ml; indice de coliformes/100ml e indice coliformes fecais/100ml em agar simples, caldo lactosado, verde brilhante - bile e E. C. Os resultados mostraram que os indices bacterianos de poluicao dos rios sofrem variacoes sazonais, diretamente relacionadas as fases de mare. As localidades que apresentaram maiores concentracoes bacterianas foram as nascentes. As aguas destes rios, de acordo com o padrao ditado pelo Ministerio do Interior, demonstraram alto grau de poluicao microbiana de origem fecal
