Automated comparative auditing of NCIT genomic roles using NCBI

Barry Cohen, Marc Oren, Hua Min, Yehoshua Perl, Michael Halper

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Biomedical research has identified many human genes and various knowledge about them. The National Cancer Institute Thesaurus (NCIT) represents such knowledge as concepts and roles (relationships). Due to the rapid advances in this field, it is to be expected that the NCIT's Gene hierarchy will contain role errors. A comparative methodology to audit the Gene hierarchy with the use of the National Center for Biotechnology Information's (NCBI's) Entrez Gene database is presented. The two knowledge sources are accessed via a pair of Web crawlers to ensure up-to-date data. Our algorithms then compare the knowledge gathered from each, identify discrepancies that represent probable errors, and suggest corrective actions. The primary focus is on two kinds of gene-roles: (1) the chromosomal locations of genes, and (2) the biological processes in which genes play a role. Regarding chromosomal locations, the discrepancies revealed are striking and systematic, suggesting a structurally common origin. In regard to the biological processes, difficulties arise because genes frequently play roles in multiple processes, and processes may have many designations (such as synonymous terms). Our algorithms make use of the roles defined in the NCIT Biological Process hierarchy to uncover many probable gene-role errors in the NCIT. These results show that automated comparative auditing is a promising technique that can identify a large number of probable errors and corrections for them in a terminological genomic knowledge repository, thus facilitating its overall maintenance.

Original languageEnglish (US)
Pages (from-to)904-913
Number of pages10
JournalJournal of Biomedical Informatics
Issue number6
StatePublished - Dec 2008

All Science Journal Classification (ASJC) codes

  • Health Informatics
  • Computer Science Applications


  • Automated auditing
  • Biological Process hierarchy
  • Biomedical knowledge base
  • Gene hierarchy
  • Gene terminology
  • NCBI Entrez Gene
  • NCBI GenBank
  • NCI Thesaurus
  • Web crawler


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