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2017 ; 71
(ä): 222-228
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MetabolitePredict: A de novo human metabolomics prediction system and its
applications in rheumatoid arthritis
#MMPMID28600026
Wang Q
; Xu R
J Biomed Inform
2017[Jul]; 71
(ä): 222-228
PMID28600026
show ga
Human metabolomics has great potential in disease mechanism understanding, early
diagnosis, and therapy. Existing metabolomics studies are often based on
profiling patient biofluids and tissue samples and are difficult owing to the
challenges of sample collection and data processing. Here, we report an
alternative approach and developed a computation-based prediction system,
MetabolitePredict, for disease metabolomics biomarker prediction. We applied
MetabolitePredict to identify metabolite biomarkers and metabolite targeting
therapies for rheumatoid arthritis (RA), a last-lasting complex disease with
multiple genetic and environmental factors involved. MetabolitePredict is a de
novo prediction system. It first constructs a disease-specific genetic profile
using genes and pathways data associated with an input disease. It then
constructs genetic profiles for a total of 259,170 chemicals/metabolites using
known chemical genetics and human metabolomic data. MetabolitePredict prioritizes
metabolites for a given disease based on the genetic profile similarities between
disease and metabolites. We evaluated MetabolitePredict using 63 known
RA-associated metabolites. MetabolitePredict found 24 of the 63 metabolites
(recall: 0.38) and ranked them highly (mean ranking: top 4.13%, median ranking:
top 1.10%, P-value: 5.08E-19). MetabolitePredict performed better than an
existing metabolite prediction system, PROFANCY, in predicting RA-associated
metabolites (PROFANCY: recall: 0.31, mean ranking: 20.91%, median ranking:
16.47%, P-value: 3.78E-7). Short-chain fatty acids (SCFAs), the abundant
metabolites of gut microbiota in the fermentation of fiber, ranked highly
(butyrate, 0.03%; acetate, 0.05%; propionate, 0.38%). Finally, we established
MetabolitePredict's potential in novel metabolite targeting for disease
treatment: MetabolitePredict ranked highly three known metabolite inhibitors for
RA treatments (methotrexate:0.25%; leflunomide: 0.56%; sulfasalazine: 0.92%).
MetabolitePredict is a generalizable disease metabolite prediction system. The
only required input to the system is a disease name or a set of
disease-associated genes. The web-based MetabolitePredict is available
at:http://xulab. CASE: edu/MetabolitePredict.