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Bioinformatics Vol. 18 no. 12 2002
Pages 1567-1575
© 2002 Oxford University Press

Computational antisense oligo prediction with a neural network model

Alistair M. Chalk * and Erik L. L. Sonnhammer

Center for Genomics and Bioinformatics, Karolinska Institutet, S-17177 Stockholm, Sweden

Received on September 4, 2001 ; revised on April 5, 2002 and May 27, 2002 ; accepted on June 6, 2002

Motivation: The expression of a gene can be selectively inhibited by antisense oligonucleotides (AOs) targeting the mRNA. However, if the target site in the mRNA is picked randomly, typically 20% or less of the AOs are effective inhibitors in vivo. The sequence properties that make an AO effective are not well understood, thus many AOs need to be tested to find good inhibitors, which is time consuming and costly. So far computational models have been based exclusively on RNA structure prediction or motif searches while ignoring information from other aspects of AO design into the model.

Results: We present a computational model for AO prediction based on a neural network approach using a broad range of input parameters. Collecting sequence and efficacy data from AO scanning experiments in the literature generated a database of 490 AO molecules. Using a set of derived parameters based on AO sequence properties we trained a neural network model. The best model, an ensemble of 10 networks, gave an overall correlation coefficient of 0.30 (p=10-8). This model can predict effective AOs (>50% inhibition of gene expression) with a success rate of 92%. Using these thresholds the model predicts on average 12 effective AOs per 1000 base pairs, making it a stringent yet practical method for AO prediction.

Availability: A prediction server is available at http://www.cgb.ki.se/AOpredict

Contact: alistair.chalk{at}cgb.ki.se

* To whom correspondence should be addressed.


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Home page
 Nucleic Acids ResHome page
X. Bo, S. Lou, D. Sun, J. Yang, and S. Wang
AOBase: a database for antisense oligonucleotides selection and design
Nucleic Acids Res., January 1, 2006; 34(suppl_1): D664 - D667.
[Abstract] [Full Text] [PDF]


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