C3 & C4 Complement Panel

The Complement proteins C3 and C4 are the integral components of the immune system. These proteins work together to enhance the ability of antibodies and phagocytic cells to clear pathogens. The C3 & C4 Complement Panel helps diagnose and monitor autoimmune diseases like systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), and immune-related conditions. 

Consider getting tested with the C3 & C4 Complement Panel if you have symptoms suggestive of autoimmune diseases, such as unexplained inflammation, frequent infections, chronic fatigue, joint pain, skin rashes, etc. Also, it can be done when there are risk factors such as family history of autoimmune disorders. Additionally, this panel may be advised if other tests indicate impaired immune function or as a part of a comprehensive evaluation for a condition with unexplained inflammation. 

The C3 & C4 Complement Panel helps differentiate between various types of immune system dysfunctions, monitor disease activity, and assess the effectiveness of treatments. It also helps identify potential complications related to abnormal complement activity, guiding doctors to tailor appropriate therapeutic strategies.

Increased levels of C3 and C4 complement proteins are seen in acute phase response, inflammation, infection, injury, biliary obstruction, focal glomerulosclerosis, skin conditions such as psoriasis, dermatitis, hives, ulcerative colitis, Crohn’s disease, psoriatic arthritis, rheumatoid arthritis, rheumatic fever, and kidney failure. Decreased levels are seen in infancy, genetic deficiency, acquired deficiency like lupus nephritis, collagen vascular diseases, severe infections, alcoholic liver disease, and hereditary or acquired angioedema.

An overnight (8-12 hours) fasting is preferred for the C3 & C4 Complement Panel. Inform your doctor about any medications or supplements that you may be taking and any existing health conditions, as all these factors may potentially influence the test results. 

Lab test results may vary across different laboratories. Abnormal test results require expert interpretation; therefore, never try to self-medicate based solely on these results, and always consult a doctor for a proper understanding of the test results. Insights from this test help the doctor tailor an appropriate treatment plan.