Text Categorization

Identify Text in a Domain of Interest

JDI can be used to identify text in a domain of interest, such as molecular biology. The motivation for using JDI is to enhance the accuracy of semantic processing for molecular genetics. This application is described as follows:

  • Method
    Consider text to be in the molecular biology domain if either of the following JDs occur in the top 15 JD rank list (returned by JDI):
    • Biochemistry
    • Molecular Biology
  • Processes
    • Run text through JDI
    • Apply candidates output filter option on [Biochemistry] and [Molecular Biology]
    • Check if either [Biochemistry] and [Molecular Biology] are in the top 15 rank JDs
  • Examples
    • Example 1:
      	PMID: 12928051
      	TI: Interleukin-6 gene alleles affect the risk of Alzheimer's disease and levels of the cytokine in blood and brain.
      	AB: Two different polymorphic regions of the interleukin-6 (IL-6) gene were investigated in patients with Alzheimer's disease (AD) and non-demented controls. The -174 C allele in the promoter region of IL-6 gene was over-represented in AD patients compared to controls and significantly increased the risk of AD. Moreover, the -174 CC genotype was associated with a high risk of the disease in women. The D allele of a variable number of tandem repeat (VNTR) was in strong linkage disequilibrium with the -174 C allele and slightly increased AD risk. On the other hand, the frequency of the VNTR C allele was decreased in patients with AD and was negatively associated with the risk of developing AD. Both the -174 CC and VNTR DD genotypes were also associated with increased IL-6 levels in the blood and brain from AD. These findings suggest that IL-6 may play a multifaceted role in AD by affecting the turnover of the cytokine.
      	JDI Outputs:
      	--- JD scores and rank based on word frequency ---
      	8|0.008401|JD067|Molecular Biology
      	24|0.004275|JD012|Biochemistry
      	--- JD scores and rank based on document count for word ---
      	7|0.021973|JD067|Molecular Biology
      	22|0.010913|JD012|Biochemistry
      	
    • Example 2:
      	PMID: 12928053
      	TI: Methylenetetrahydrofolate reductase and angiotensin converting enzyme gene polymorphisms in two genetically and diagnostically distinct cohort of Alzheimer patients.
      	AB: The role of methylenetetrahydrofolate reductase (MTHFR) and angiotensin converting enzyme (ACE) gene polymorphisms as risk factors for the occurrence of Alzheimer's disease (AD) is still controversial. In this study, we investigated the common MTHFR C677-->T and ACE insertion/deletion (I/D) gene polymorphisms as risk factors for AD in two genetically and diagnostically distinct cohort of Alzheimer's patients. We analyzed a neuropathologically confirmed American cohort of 124 AD patients and 97 elderly controls, and a clinically diagnosed Italian cohort of 126 probable AD cases, 106 elderly controls, and a community-based sample of 1232 subjects aged under 65 years. No difference was found in polymorphism distribution between cases and controls in both study cohorts. We also tested a possible association between the polymorphisms investigated. No interaction was found between the MTHFR and ACE alleles. Moreover, no association was found for the ACE and MTHFR polymorphisms with age at onset, disease duration and MMSE score at observation. Thus, in our study, MTHFR C677-->T and ACE I/D polymorphisms do not appear to confer an added risk for AD.
      	JDI Outputs:
      	--- JD scores and rank based on word frequency ---
      	10|0.008049|JD067|Molecular Biology
      	17|0.006159|JD012|Biochemistry
      	--- JD scores and rank based on document count for word ---
      	8|0.018241|JD067|Molecular Biology
      	16|0.012244|JD012|Biochemistry
      	
    • 	PMID: 12946561
      	TI: Myeloperoxidase G-463A polymorphism and Alzheimer's disease in the ApoEurope study.
      	AB: Alzheimer's disease (AD) is the most common cause of dementia in the elderly. Epidemiological and molecular genetic studies have shown the existence of several genes associated with increased risk of AD, the major genetic susceptibility locus coding for apolipoprotein E (apoE). A polymorphism in the myeloperoxidase gene (MPO) has previously been associated with AD susceptibility. However, results in the literature are controversial and seem to be dependent on several factors such as gender, apoE polymorphism or the genetic structure of the population. We investigated MPO G-463A and apoE polymorphism in 265 cases and 246 controls from the ApoEurope Study. In females, we found a significant association between MPO genotype and AD (P=0.034), GG genotype frequency being lower in cases (52.4%) as compared to controls (64.2%). In men, there was no significant effect of MPO polymorphism. No interaction was found between MPO polymorphism and apoE epsilon 4 allele. In conclusion, the G-463A polymorphism of MPO was statistically associated with AD in a gender-specific manner. However, given the low significance of P value we suggest no causal effect of the MPO gene in AD, as also evidenced in a recent meta-analysis. Our results support the hypothesis of a possible linkage disequilibrium between the MPO G-463A gene polymorphism and another functional variant involved in AD.
      	JDI Outputs:
      	--- JD scores and rank based on word frequency ---
      	12|0.008478|JD012|Biochemistry
      	16|0.007282|JD067|Molecular Biology
      	--- JD scores and rank based on document count for word ---
      	11|0.018224|JD067|Molecular Biology
      	18|0.013880|JD012|Biochemistry
      	
  • Exceptions
    • PMID: 12927758
    • PMID: 12922131
    • PMID: 12910497