政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/77424
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    题名: MeInfoText 2.0: gene methylation and cancer relation extraction from biomedical literature
    作者: Lai, Po-Ting
    賴柏廷
    Hsu, Wen-Lian
    Dai, Hong-Jie
    Fang, Yu-Ching
    贡献者: 資訊科學系
    日期: 2011-12
    上传时间: 2015-08-05 14:29:53 (UTC+8)
    摘要: Background DNA methylation is regarded as a potential biomarker in the diagnosis and treatment of cancer. The relations between aberrant gene methylation and cancer development have been identified by a number of recent scientific studies. In a previous work, we used co-occurrences to mine those associations and compiled the MeInfoText 1.0 database. To reduce the amount of manual curation and improve the accuracy of relation extraction, we have now developed MeInfoText 2.0, which uses a machine learning-based approach to extract gene methylation-cancer relations. Description Two maximum entropy models are trained to predict if aberrant gene methylation is related to any type of cancer mentioned in the literature. After evaluation based on 10-fold cross-validation, the average precision/recall rates of the two models are 94.7/90.1 and 91.8/90% respectively. MeInfoText 2.0 provides the gene methylation profiles of different types of human cancer. The extracted relations with maximum probability, evidence sentences, and specific gene information are also retrievable. The database is available at http://​bws.​iis.​sinica.​edu.​tw:​8081/​MeInfoText2/​. Conclusion The previous version, MeInfoText, was developed by using association rules, whereas MeInfoText 2.0 is based on a new framework that combines machine learning, dictionary lookup and pattern matching for epigenetics information extraction. The results of experiments show that MeInfoText 2.0 outperforms existing tools in many respects. To the best of our knowledge, this is the first study that uses a hybrid approach to extract gene methylation-cancer relations. It is also the first attempt to develop a gene methylation and cancer relation corpus.
    關聯: BMC Bioinformatics,12:471
    数据类型: article
    DOI 連結: http://dx.doi.org/10.1186/1471-2105-12-471
    DOI: 10.1186/1471-2105-12-471
    显示于类别:[資訊科學系] 期刊論文

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