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2017 ; 7
(ä): 43350
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Identification of outcome-related driver mutations in cancer using conditional
co-occurrence distributions
#MMPMID28240231
Treviño V
; Martínez-Ledesma E
; Tamez-Peña J
Sci Rep
2017[Feb]; 7
(ä): 43350
PMID28240231
show ga
Previous methods proposed for the detection of cancer driver mutations have been
based on the estimation of background mutation rate, impact on protein function,
or network influence. In this paper, we instead focus on those factors
influencing patient survival. To this end, an approximation of the log-rank test
has been systematically applied, even though it assumes a large and similar
number of patients in both risk groups, which is violated in cancer genomics.
Here, we propose VALORATE, a novel algorithm for the estimation of the null
distribution for the log-rank, independent of the number of mutations. VALORATE
is based on conditional distributions of the co-occurrences between events and
mutations. The results, achieved through simulations, comparisons with other
methods, analyses of TCGA and ICGC cancer datasets, and validations, suggest that
VALORATE is accurate, fast, and can identify both known and novel gene mutations.
Our proposal and results may have important implications in cancer biology,
bioinformatics analyses, and ultimately precision medicine.
|*Algorithms
[MESH]
|*Gene Expression Regulation, Neoplastic
[MESH]
|*Mutation
[MESH]
|Computational Biology/methods/*statistics & numerical data
[MESH]