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IIT-Madras Develops AI Algorithm to Spot Cancer-Causing Alterations

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Researchers at the Indian Institute of Technology (IIT) Madras have developed an Artificial Intelligence-based mathematical model to identify cancer-causing alterations in cells.

The algorithm uses a relatively unexplored technique of leveraging DNA composition to pinpoint genetic alterations responsible for cancer progression, which is difficult using present methodologies. The results are published in the peer-reviewed International Journal Cancers.

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Understanding the underlying mechanism of these alterations will help identify the most appropriate treatment strategy for a patient in an approach known as ‘precision oncology.

“One of the major challenges faced by cancer researchers involves the differentiation between the relatively small number of ‘driver’ mutations that enable the cancer cells to grow and the large number of ‘passenger’ mutations that do not have any effect on the progression of the disease, a said Prof B. Ravindran, Head, Robert Bosch Centre for Data Science and AI (RBCDSAI), IIT Madras, in a statement.

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The researchers decided to look at this problem from a different perspective in this study. The main goal was to discover patterns in the DNA sequences – made up of four letters, or bases, A, T, G, and C surrounding a particular site of alteration.

The underlying hypothesis was that these patterns would be unique to individual types of mutations — drivers and passengers, and, therefore could be modeled mathematically to distinguish between the two classes.

Using sophisticated AI techniques, the researchers developed a novel prediction algorithm, NBDriver and tested its performance on several open-source cancer mutation datasets.

“Our model could distinguish between well-studied drivers and passenger mutations from cancer genes with an accuracy of 89 percent. Furthermore, combining the predictions from NBDriver and three other commonly used driver prediction algorithms resulted in an accuracy of 95 percent, significantly outperforming existing models,” Ravindran said.

In addition,”NBDriver could accurately identify 85 percent of the rare driver mutations from patients diagnosed with Glioblastoma Multiforme (GBM), a particularly aggressive type of cancer affecting the brain or spine,” said Karthik Raman, Associate Professor, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, IIT Madras.

NBDriver is available publicly and can be used to obtain predictions on any user-defined set of mutations. In short, given a new mutation and its surrounding DNA makeup, one would be able to predict its class — driver or passenger.

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