Levels of C4d and C4d/C4 associate with clinical and histopathological treatment response in proliferative lupus nephritis. Complement activation markers, particularly C4d and the C4d/C4 ratio, are ...

Please provide your email address to receive an email when new articles are posted on . Erythrocyte-bound C4d, a biomarker for systemic lupus erythematosus patented by Exagen Diagnostics, is useful in ...

A complement C4 (also known as a complement component 4, or simply C4) is a test to measure the level of C4 proteins you have in your blood. These proteins play a role in how your immune system ...

A complement blood test measures how well complement proteins in your blood support immune defense. The complement system helps antibodies fight germs and clear foreign substances. Complement testing ...

Your complement system consists of a group of important proteins in your bloodstream. These proteins help your immune system fight off harmful invaders, such as bacteria, and other foreign substances.

Complement activation in patients with AAV who are in remission may be reflective of ongoing renal scarring. Persistent complement activation during disease remission in antineutrophil cytoplasmic ...