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Is Artificial Intelligence (AI) the best way for Efficient and Effective Drug Discovery?

Team Four by Team Four
April 22, 2022
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Is Artificial Intelligence (AI) the best way for Efficient and Effective Drug Discovery?
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In Artificial Intelligence (AI) the best way for Efficient and Effective Drug Discovery?

Artificial intelligence (AI) has become a part of modern life, allowing computers and machines to learn and work the same way that humans can.

Alexander Burik’s article focused on how biotechs are progressing in AI – assisted early drug design, real-world outcomes thus far, and if AI is living up to its potential in the life science industry. AI has the potential to make complex drug discovery processes faster and more cost-effective, with the goal of reducing the time it takes for a new drug to reach a patient.

In the current pandemic, AI has been successfully used to identify potential drugs that could be used to treat Covid-19. Recently, Google’s Deepmind AI system AlphaFold has found a solution to how proteins fold into their 3D structure, which may create new opportunities in structure-based drug design.

The challenges of using AI in drug discovery

Drug discovery researchers, on the other hand, nonetheless encounter a number of challenges today.

“Overall, the convergence of AI and life sciences, and AI in drug discovery specifically, is a new field,” said Daniel Cohen, CEO and Founder of Valence Discovery, an AI drug design company based in Canada. He also said, “A big sticking point is just the lack of datasets of sufficient size and quality that exist in a typical drug discovery program.”

Moreover, it can be difficult to pinpoint what AI-powered tools can or cannot realistically achieve in drug discovery at the moment. As a result, industry insiders have developed unreasonable expectations. Disappointments with AI stem in part from the belief that it is a “magic bullet” that will solve all of drug discovery’s problems.

“There is always a bigger gap than people outside the space realize, especially between advances in fundamental machine learning research and what it takes to get the most out of these methods in practice,” Cohen explained.

Finding hits and inventing molecules

Despite the challenges it faces, AI in drug discovery is making significant steps in the right direction.

“We are beginning to see successes. Of course, it’s going to take time for reality to meet expectations. In general, AI applications in drug discovery and medicinal chemistry is a field that is progressing really fast,” Cohen said.

Two areas of drug discovery where AI already is a powerful tool are hit identification and de novo molecular design. Hit identification searches libraries for pre-existing compounds that could be viable active ingredients in new drugs similar to a trial and error process. De novo molecular design is a method by which new, unique molecules are created computationally from scratch. AI can potentially analyze and modify chemical properties more thoroughly and quickly than groups of scientists using traditional methods can.

Grant Wishart, Director of Computer Aided Drug Design at Charles River Laboratories, AI, drug discovery said, “AI applied to hit identification and de novo molecular design can explore real vast areas of chemical space, and generate molecules that can actually be synthesized in the laboratory.”

A common limitation of AI-driven drug discovery is that the chemical reactions involved in creating a potential drug candidate are unknown, which makes the actual laboratory synthesis of the compound challenging.

“This has been a major roadblock in this field,” said Cohen.

An AI partnership paves the way for better drug discovery

Earlier this year, Charles River announced a partnership with Valence Discovery. The collaboration will use AI to improve how Charles River helps clients with new and pre-existing drug discovery programs.

“At Charles River, we think that AI has major potential to enhance our science and impact our client projects. We were specifically looking for a partner in the de-novo design space and felt that Valence’s technology and creativity was an excellent fit for a seamless collaborative experience,” said Wishart.

In particular, Valence is addressing two key challenges in AI-driven drug discovery: working with limited data and designing compounds that can actually be synthesized in the lab. For example, Valence Discovery’s REACTOR technology models the series of chemical reactions leading to a potential drug candidate’s creation in addition to the molecule itself.

“What is unique about Valence is that we’re the first company to bring techniques for low data learning to drug design, and have developed technologies to design high-quality molecules, optimized for multiple parameters, that can be readily synthesized,” Cohen elaborated.

Valence uses so-called few-shot learning algorithms, which analyze small and large datasets to explain the connections between molecular structure and bioactivity. This includes properties and targets out of reach of existing deep learning algorithms. Hence, Valence’s technology can help predict important properties of and relationships between compounds that may escape human chemists or other AI-driven approaches. By combining AI-driven insights with the intuition of experienced chemists, AI tools can be used to rapidly and cost-effectively find or create new, effective drug-like compounds.

An exciting future for AI-driven drug discovery

“We want to input the parameters our molecules should satisfy, and be able to efficiently generate novel molecules to meet those parameters,” explained Cohen.

By eliminating undesirable interactions with off-targets, this strategy, known as multiparameter optimization, could increase a drug’s target selectivity and minimize toxicity. Multiparameter optimization can also reduce the number of compounds created when looking for prospective medication options. It can also cut down on the number of design cycles a drug candidate must go through to be approved. In the near future, AI is unlikely to totally replace human brilliance in drug discovery. To realize AI’s full potential in drug discovery, closer collaboration, trust, and interaction between AI technologists and life scientists are required. The true influence of AI on drug development will begin to emerge when AI engineers become more proficient in natural science and life scientists gain a deeper understanding of it.

Via: Jee-jee Grace Queque
Tags: Artificial IntelligenceDrug Discovery
Team Four

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