Completed Digestion, Kidneys & Other Organs Diabetes, Hormones & Metabolism

ICF GPR151 agonists for Irritable Bowel Syndrome

In plain English

AI plain-English summary

A chemical that switches on a mysterious gut nerve protein has been found, but it breaks down too fast in the liver to become a drug. This matters because the protein, GPR151, sits on nerves that control gut movement. When it malfunctions, it is linked to irritable bowel syndrome, diabetes, and chronic pain—conditions that affect millions of people and have few effective treatments. No one knows what naturally activates GPR151, making it an "orphan" target. The team screened 25,000 chemicals and tested around 200 variants to find a tool compound that measurably altered human gut muscle contractions. But that compound and its relatives are too insoluble and metabolically unstable for medicine. This grant funds a new approach: screening AstraZeneca’s chemical library against a cell-based assay for GPR151, aiming to find drug-like molecules that avoid the earlier problems. If successful, the researchers plan to spin out a company to fund the chemical synthesis and testing needed to turn a hit into a real treatment. The work is early-stage but directly targets a biological mechanism with clear relevance to gut disorders and pain.

View original technical description
GPR151 is an orphan protein - we do not know what activates it. It is expressed in nerves and is associated with diseases involving altered gut motility such as irritable bowel syndrome, diabetes and pain. Our team has discovered tool chemicals that activate the protein using UKRI funding to develop and validate suitable assays. We screened 25,000 diverse chemicals and found one that had activity. We designed, made and tested around 200 closely related chemicals and developed a tool chemical that was used to show meaningful effects on human gut motility. Unfortunately, the tool and related chemicals have issues with solubility and metabolic stability in the presence of liver enzymes. This makes them unsuitable for development into new medicines. The aim of this grant is to find alternative chemicals that would be suitable for developing into medicines by screening AstraZeneca's collection against our cell-based assay of GPR151. We aim to progress the project further by forming a company to provide the investment for the needed rounds of chemical synthesis and testing.

View the original record at the funder ↗

Researchers

David Gray (Principal Investigator)

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Original classification

Research and Innovation

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