Extractable nuclear antibodies

This is an important test used to check for the presence of 7 specific antibodies against ENAs.

Venous blood
8 tests included
4 days turnaround



About Extractable nuclear antibodies

What are extractable nuclear antigens?

Extractable nuclear antigens (ENAs) are proteins in the cell nucleus which can be easily extracted using saline. Autoantibodies are produced by the immune system against ENAs. Antibodies are proteins typically produced by the immune system to target and protect against harmful entities. In rare cases the immune system can malfunction, producing autoantibodies which target and attack the body’s own cells. Disorders caused by this process are called autoimmune diseases and can be potentially life-threatening. Diseases associated with the presence of ENA antibodies include lupus erythematosus, Sjögren's syndrome and rheumatoid arthritis.  

Why take the test?

This test checks for the presence of 7 specific antibodies against ENAs. It is typically used after a positive antinuclear antibody (ANA) test to diagnose an autoimmune condition and distinguish between conditions such as lupus and rheumatoid arthritis.


What's tested


How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.