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Test Code PBC2 SP100 and GP210 Antibodies, IgG, Serum


Additional Testing Requirements


This is a first line test when primary biliary cholangitis is strongly suspected. It should be ordered in conjunction with testing for mitochondrial antibodies (M2) (AMA / Mitochondrial Antibodies [M2], Serum) and antinuclear antibodies (NAIFA / Antinuclear Antibodies, HEp-2 Substrate, IgG, Serum).



Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1.0 mL Serum

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Useful For

Evaluating the risk of primary biliary cholangitis in anti-mitochondrial antibody (AMA)-negative patients by identification of Sp100 and gp210 antibodies

 

Estimating risk in AMA-positive patients with incomplete feature of disease

Profile Information

Test ID Reporting Name Available Separately Always Performed
SP100 SP100 Antibody, IgG, S Yes Yes
GP210 GP210 Antibody, IgG, S Yes Yes

Method Name

Enzyme-Linked Immunosorbent Assay (ELISA)

Reporting Name

SP100 and GP210 Antibodies, IgG, S

Specimen Type

Serum

Specimen Minimum Volume

Serum: 0.4 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 21 days
  Frozen  21 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK
Heat-treated specimen Reject

Reference Values

Negative: ≤20.0 Units

Equivocal: 20.1-24.9 Units

Positive: ≥25.0 Units

Interpretation

A positive result for anti-gp210 antibodies or anti-Sp100 antibodies in the setting of chronic cholestasis after exclusion of other causes of liver disease is highly suggestive of primary biliary cholangitis.

Day(s) Performed

Tuesday

Report Available

2 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

83516 x 2

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PBC2 SP100 and GP210 Antibodies, IgG, S 106055-7

 

Result ID Test Result Name Result LOINC Value
SP100 SP100 Antibody, IgG, S 96565-7
GP210 GP210 Antibody, IgG, S 96560-8

Forms

If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Test Request (T728) with the specimen.

Testing Algorithm

For information see First-Line Screening for Autoimmune Liver Disease Algorithm.