Title |
Estimating causal effects with a non-paranormal method for the design of efficient intervention experiments
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Published in |
BMC Bioinformatics, June 2014
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DOI | 10.1186/1471-2105-15-228 |
Pubmed ID | |
Authors |
Reiji Teramoto, Chiaki Saito, Shin-ichi Funahashi |
Abstract |
Knockdown or overexpression of genes is widely used to identify genes that play important roles in many aspects of cellular functions and phenotypes. Because next-generation sequencing generates high-throughput data that allow us to detect genes, it is important to identify genes that drive functional and phenotypic changes of cells. However, conventional methods rely heavily on the assumption of normality and they often give incorrect results when the assumption is not true. To relax the Gaussian assumption in causal inference, we introduce the non-paranormal method to test conditional independence in the PC-algorithm. Then, we present the non-paranormal intervention-calculus when the directed acyclic graph (DAG) is absent (NPN-IDA), which incorporates the cumulative nature of effects through a cascaded pathway via causal inference for ranking causal genes against a phenotype with the non-paranormal method for estimating DAGs. |
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