The researchers will present their findings at the 36th Conference on Neural Information Processing Systems, which will be held from Nov. 28 through Dec. 9 in New Orleans.
Typically, the early phases of drug discovery involve researchers identifying a biological target, such as a protein associated with a disease of interest. The next step was to screen libraries of thousands of potential chemical compounds that might be effective or could be modified to affect the target to alleviate the disease’s cause or symptoms. The most promising candidates move on to the lengthy and expensive process of laboratory and clinical testing and regulatory approval.
“The drug-discovery process can take 10 to 15 years and can cost a billion dollars,” Coskunuzer said. “Drug companies want a more cost-effective way to do this. They want to find the most promising compounds at the beginning of the process so they’re not wasting time testing dead ends.
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“We have provided a completely new method of virtual screening that is computationally efficient and ranks compounds based on how likely they are to work.”
While virtual screening of libraries of chemical compounds is not new, Coskunuzer said his group’s approach significantly outperforms other state-of-the-art methods on large data sets.
The UTD and Novartis team framed the virtual screening process as a new type of topology-based graph ranking problem from a branch of mathematics called topological data analysis. Their method characterizes each molecular compound based on the shape of its underlying physical substructure its topology as well as a series of physical and chemical properties of the components of the molecule. From this information, the researchers develop a unique “topological fingerprint” for each compound that is used to rank it according to how well it fits the desired properties.
The next step will be to generalize the method to molecular property prediction, which includes scoring a compound on how soluble it is in water. Solubility can be critical to a drug’s efficacy in the human body.
“If you find a good compound, but it does not have the desired molecular properties if it’s not soluble then it’s likely that it is not going to work. You want to be able to test these properties first before a drug candidate gets too far into development,” Coskunuzer said.
Other UT Dallas researchers working on the project are Dr. Yulia Gel, professor of mathematical sciences in the School of Natural Sciences and Mathematics, and Dr. Ignacio Segovia-Dominguez, a postdoctoral research associate in computer science in the Erik Jonsson School of Engineering and Computer Science.
Novartis contributors include Dr. Andac Demir, a data scientist in its AI Innovation Lab, and Dr. Bulent Kiziltan, executive director of the lab. Dr. Yuzhou Chen, MS’17, assistant professor of computer and information sciences at Temple University, also contributed.
The UTD researchers are supported by grants from the National Science Foundation, the Simons Foundation, and the Office of Naval Research.
Source: Eurekalert
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