The “classical” pathway of the complement system is triggered when C1q binds to antibodies that are already bound to antigens on a cell surface.

A complement blood test checks for autoimmune diseases or other issues with your immune system. Your doctor might test you if you have a family history of certain conditions, such as rheumatoid ...

There are several reasons why you might have high complement C4 levels over 45 milligrams per deciliter. If you have had a recent injury or infection, you’re likely to have more C4 in your blood.

But if the complement system remains in its microbe-fighting state after the viruses and bacteria are eliminated, “it starts damaging healthy cells,” he said.

Researchers have identified a blood protein ‘signature’ in the complement system, part of the immune system, of patients with long COVID that may improve the diagnosis and lead to a treatment ...

Complement 3 glomerulopathy is a type of kidney disease. It’s related to your complement system. This is the system that helps fight infections.

JENA, Germany, Sept. 03, 2024 (GLOBE NEWSWIRE) -- InflaRx N.V. (Nasdaq: IFRX), a biopharmaceutical company pioneering anti-inflammatory therapeutics targeting the complement system, today ...

image: “In patients with Long Covid, the complement system no longer returns to its basal state.” Onur Boyman, professor of immunology at University of Zurich ...