Scientists Find a 'Brake' to Stop Inflammation

Topic: Biology

Researchers at University College London discovered how our body stops inflammation. They found a group of small molecules that act like brakes on the immune system, helping to prevent excessive growth of white blood cells that can cause chronic inflammation.

Inflammation is a natural response of our immune system when we get hurt or have an infection. It helps us fight off germs and repair damaged tissue. But if this response stays active for too long, it can start harming healthy tissues and contribute to diseases like arthritis, heart disease, and diabetes.

A team of scientists at University College London (UCL) wanted to understand how our body knows when the danger has passed and it's time to stop fighting and repair. They published their findings in a study called 'Epoxy-oxylipins direct monocyte fate in inflammatory resolution in humans' in Nature Communications.

The researchers gave healthy volunteers a tiny injection of UV-killed E. coli bacteria on their forearm. This triggered an inflammatory response, which produced signs like pain, redness, heat, and swelling. The scientists then gave the participants a drug called GSK2256294 at different stages of the inflammatory response. This drug blocks an enzyme that breaks down small molecules called epoxy-oxylipins.

The study found that blocking this enzyme allowed more epoxy-oxylipins to remain in the body, which helped pain resolve faster and reduced the number of white blood cells that can contribute to chronic inflammation.

Why It Matters

This discovery is important because it could lead to new treatments for inflammatory diseases. Chronic inflammation is a major global health threat, and finding ways to stop it safely without suppressing our immune system's ability to fight off germs is crucial.

Key Facts

• Scientists at University College London discovered how the body stops inflammation by identifying a group of small molecules called epoxy-oxylipins that act like brakes on the immune system.
• The researchers gave healthy volunteers an injection of UV-killed E. coli bacteria to trigger an inflammatory response and then tested a drug that blocks an enzyme that breaks down epoxy-oxylipins.
• Blocking this enzyme allowed more epoxy-oxylipins to remain in the body, which helped pain resolve faster and reduced the number of white blood cells that can contribute to chronic inflammation.
• The study was published in Nature Communications and could lead to new treatments for inflammatory diseases.
• Chronic inflammation is a major global health threat, and finding ways to stop it safely without suppressing our immune system's ability to fight off germs is crucial.

Key Terms

Epoxy-oxylipins

Small molecules that act like brakes on the immune system to prevent excessive growth of white blood cells.

Soluble Epoxide Hydrolase (sEH)

An enzyme that breaks down epoxy-oxylipins, and blocking it allows more of these protective molecules to remain in the body.

Intermediate Monocytes

A type of white blood cell that can support healing but may contribute to chronic inflammation if too many accumulate or stay active for too long.

Implications

This discovery is important because it could lead to new treatments for inflammatory diseases. Chronic inflammation is a major global health threat, and finding ways to stop it safely without suppressing our immune system's ability to fight off germs is crucial.