Diabetes Autoantibodies (ZnT8, GAD, IA2)
- Description
- Autoantibodies to Glutamic Acid Decarboxylase (GAD), Islet Antigen 2 (IA2), and Zinc-Transporter 8 (ZnT8) are diagnostic and prognostic markers of Type I Diabetes Mellitus. These autoantibodies are tested for by enzyme-linked immunoassay and is only able to be requested as a complete panel. For GAD antibodies for neurological investigations, please see separate heading.
- Related condition
- Reference range
- Glutamic acid decarboxylase antibodies, <5.0 IA2 antibodies, <7.5 Zinc Transporter 8 antibodies, <15.0
- Units
- U/ml
- Testing site
- Synnovis : Reference Services : Blackfriars Hub
- Laboratory
- Diagnostic Immunology
- Sample type and volume required
- Clotted (Gold top vacutainer)
- Special sample instructions
All tests are compromised by prolonged transit times. For this reason, date of bleed and date of postage must be provided with each request.
- Storage and transport
- Serum stored at 4ºC should be sent by 1st class post as soon as possible
- Turnaround time
- 28 days
- Time limit for extra tests
- 10 days