Scientists have discovered a new metabolic process in the body that can switch off inflammation. They have discovered that ‘itaconate’ – a molecule derived from glucose – acts as a powerful off-switch for macrophages, which are the cells in the immune system that lie at the heart of many inflammatory diseases including arthritis, inflammatory bowel disease and heart disease.
The scientists, working in the School of Biochemistry and Immunology in the Trinity Biomedical Sciences Institute at Trinity College Dublin, hope their discovery will have relevance for inflammatory and infectious diseases – and that their findings may also help to develop much-needed new drugs to treat people living with these conditions.
Professor of Biochemistry at Trinity, Luke O’Neill, was, along with Dr Mike Murphy of the University of Cambridge, the joint leader of the work just published in leading international journal Nature. The discoveries were made using both human cells and mice as a model organism.
Professor O’Neill said: “My lab has been exploring metabolic changes in macrophages for the past six years and we’ve come across what we think is the most important finding yet.”
“It is well known that macrophages cause inflammation, but we have just found that they can be coaxed to make a biochemical called itaconate. This functions as an important brake, or off-switch, on the macrophage, cooling the heat of inflammation in a process never before described.”
Dr Evanna Mills, who, with Dylan Ryan was joint first author of the work, said: “The macrophage takes the nutrient glucose, whose day job it is to provide energy, and surprisingly turns it into itaconate. This then blocks production of inflammatory factors, and also protects mice from the lethal inflammation that can occur during infection.”
Dylan Ryan added: “We’ve found that itaconate can directly modify a whole host of proteins important for inflammation in a chemical reaction never before described, and that this reaction is important for the anti-inflammatory effects of itaconate.”
The discovery is very much on the frontier of inflammation research and Professor O’Neill and his collaborators are now exploring its relevance to the onset and development of inflammatory and infectious diseases. They are also keen to explore whether the findings can be exploited in the effort to develop new anti-inflammatory medicines.
The work was a collaboration with Harvard Medical School, the University of Cambridge, the University of Oxford, Johns Hopkins University, the University of Dundee, and GlaxoSmithKline, where both Professor O’Neill and Dr Mills spent time on sabbatical.
Professor O’Neill said: “This discovery and the new research pathways it has opened up will keep us busy for some time but we are hopeful that it will one day make a difference to patients with diseases that remain difficult to treat.”
The Latest on: Inflammation
via Google News
The Latest on: Inflammation
- The cysteinyl leukotriene 3 receptor regulates expansion of IL-25–producing airway brush cells leading to type 2 inflammation on October 5, 2018 at 3:20 pm
1 Division of Rheumatology, Immunology and Allergy, Jeff and Penny Vinik Center for Allergic Disease Research, Brigham and Women’s Hospital and Department of Medicine, Harvard Medical School, Boston, ... […]
- 9 Subtle Signs of Hidden Inflammation in Your Body on October 5, 2018 at 10:30 am
Inflammation has been called both a friend and a foe. Acute inflammation is the body’s normal and complex reaction to a threat, whether bacteria, a burn, frostbite, or a sprain. “The body marshals its ... […]
- PET scans show fibromyalgia patients have inflammation in the brain on October 5, 2018 at 7:59 am
FRIDAY, Oct. 5, 2018 -- People with fibromyalgia have widespread inflammation in their brains, new research reveals. "Finding an objective neurochemical change in the brains of people who are used to ... […]
- Stretch, inflammation and hypertension on October 5, 2018 at 7:50 am
Monocytes are known to play an important role in hypertension, although the exact mechanism remains unclear. It is hypothesized that a potential source of monocyte activation originates from its ... […]
- Chris Sale expects to 'find a way with whatever I have' after shoulder inflammation on October 4, 2018 at 12:54 pm
BOSTON -- Chris Sale insists he feels good and expects to win regardless of questions over his velocity after shoulder issues, as the Red Sox ace gets the ball for Game 1 of Friday's American League D... […]
- Cell death protein also damps inflammation on October 1, 2018 at 6:43 am
The DNA receptor (green) is bound to DNA (blue) inside immune cells (macrophages) (cell membrane colored pink) during infection. Credit: the Rathinam Lab Inflammation is one strategy your body ... […]
- Widespread Inflammation Found in Brains of Fibromyalgia Patients on September 29, 2018 at 7:25 am
The combined efforts of research teams in the U.S. and Sweden have resulted in a new study showing widespread inflammation in the brains of fibromyalgia patients. The research is published online ... […]
- 7 Foods That Can Aid in Healing Skin Inflammation on September 26, 2018 at 10:04 am
Undisputed facts: Breakouts suck, and finding a cure can take a really, really long time, regardless of your budget and specific needs. Thankfully, there is one remedy that can work for any and ... […]
- Inflammation, Lipids Tied to CAD Risk in Psoriasis on September 26, 2018 at 7:08 am
Novel imaging techniques that assess vascular inflammation (VI) and novel lipid assays are elucidating the association between psoriasis and coronary artery disease (CAD). Two studies conducted at the ... […]
via Bing News