Arginine:Neutral Endopeptidase Activity in Serum (ACE Activity)

What Does This Test Measure?

Neutral endopeptidase (also called ACE, Angiotensin-Converting Enzyme) is an enzyme found in the blood and tissues. This test specifically measures its activity level in your serum. Neutral endopeptidase breaks down certain proteins and plays a role in regulating blood pressure and fluid balance. While its exact role in health is still being studied, it may be involved in kidney function and vascular processes.

Why Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms or conditions that could involve kidney function, blood pressure regulation, or vascular health. This could include chronic kidney disease, heart failure, or other conditions affecting fluid balance or blood vessels.

How Is This Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate the serum (the liquid part without blood cells). The enzyme activity is measured using specialized laboratory techniques that detect how quickly the enzyme breaks down a specific substrate.

What Are Possible Results?

Results are typically reported as a ratio or index, indicating the relative activity level of the enzyme. There are no universally accepted reference ranges for this specific test, as it is less commonly used than other enzyme assays. Your results will be interpreted in the context of your overall health and medical history.