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EPIC ORDER CODE LAB1879 Bullous Pemphigoid, BP180 and BP230, IgG Antibodies, Serum

Additional Codes

Sunquest: MBPABM

MAYO: BPAB


Specimen Required


Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Submission container/tube: Plastic vial

Specimen Volume: 1 mL

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


Useful For

Initial screening test in the diagnosis of bullous pemphigoid and its variants

 

Complementing the standard serum test of indirect immunofluorescence utilizing primate esophagus substrate and primate salt-split skin substrate (CIFS / Cutaneous Immunofluorescence Antibodies [IgG], Serum)

Method Name

Enzyme-Linked Immunosorbent Assay (ELISA)

Reporting Name

BP 180 and 230, Serum

Specimen Type

Serum Red

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  14 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Clinical Information

Bullous pemphigoid (BP) is a chronic pruritic blistering disorder found mainly in aged persons, characterized by the development of tense blisters over an erythematous or urticarial base. IgG anti-basement membrane zone antibodies are found in the serum of patients, and linear IgG and complement component 3 sediment is found on the basement membrane zone of the lesion. Several well characterized variants exist including localized, mucous membrane predominant and pemphigoid gestationis, also referred to as herpes gestationis.

 

Target antigens of the autoantibodies in BP patient serum are BP230 and BP180, also called BPAG1 and BPAG2. Molecular weight of these antigens is 230 kDa and 180 kDa, respectively. BP180 is thought to be the direct target of the autoantibody because of its location along the basement membranes, and the autoantibody against BP230 is thought to be secondarily produced.

Reference Values

BULLOUS PEMPHIGOID 180:

<20 RU/mL (negative)

≥20 RU/mL (positive)

 

BULLOUS PEMPHIGOID 230:

<20 RU/mL (negative)

≥20 RU/mL (positive)

Interpretation

Antibodies to bullous pemphigoid (BP) BP180 and BP230 have been shown to be present in most patients with pemphigoid. Adequate sensitivities and specificity for disease are documented and Mayo Clinic's experience demonstrates a very good correlation between BP180 and BP230 results and the presence of pemphigoid (see Supportive Data). However, in those patients strongly suspected to have pemphigoid, either by clinical findings or by routine biopsyor direct immunofluorescence, and in whom the BP180/BP230 assay is negative, follow-up testing by CIFS / Cutaneous Immunofluorescence Antibodies (IgG), Serum is recommended.

 

Antibody titer may correlate with disease activity in some patients. Patients with severe disease may be expected to have high titers of antibodies to BP. Titers may decrease with clinical improvement.

Clinical Reference

1. Liu Z, Diaz LA, Troy JL, et al. A passive transfer model of the organ-specific autoimmune disease, bullous pemphigoid, using antibodies generated against the hemidesmosomal antigen, BP180. J Clin Invest. 1993;92(5):2480-2488

2. Matsumura K, Amagai M, Nishikawa T, Hashimoto T. The majority of bullous pemphigoid and herpes gestationes serum samples react with the NC16a domain of the e180-kD bullous pemphigoid antigen. Arch Dermatol Res. 1996;288(9):507-509

3. Stanley JR, Hawley-Nelson P, Yuspa SH, Shevach EM, Katz SI. Characterization of bullous pemphigoid antigen: a unique basement membrane protein of stratified aqueous epithelia. Cell. 1981;24(3):897-903

4. Hamada T, Nagata Y, Tomita M, Salmhofer W, Hashimoto T. Bullous pemphigoid sera react specially with various domains of BP230, most frequently with C-terminal domain, by immunblot analyses using bacterial recombinant proteins covering the entire molecule. Exp Dermatol. 2001;10(4):256-263

5. Rico MJ, Korman NJ, Stanley JR, Tanaka T, Hall RP. IgG antibodies from patients with bullous pemphigoid bind to localized epitopes on synthetic peptides encoded by bullous pemphigoid antigen cDNA. J Immunol. 1990;145(11):3728-3733

6. Wieland CN, Comfere NI, Gibson LE, Weaver AL, Krause PK, Murray JA. Anti-bullous pemphigoid 180 and 230 antibodies in a sample of unaffected subjects. Arch Dermatol. 2010;146(1):21-25

7. Montagnon CM, Tolkachjov SN, Murrell DF, Camilleri MJ, Lehman JS. Subepithelial autoimmune blistering dermatoses: Clinical features and diagnosis. J Am Acad Dermatol. 2021;85(1):1-14

8. Montagnon CM, Lehman JS, Murrell DF, Camilleri MJ, Tolkachjov SN. Subepithelial autoimmune bullous dermatoses: disease activity assessment and therapy. J Am Acad Dermatol. 2021;85(1):18-27

Method Description

This enzyme-linked immunosorbent assay (ELISA) method detects and measures serum levels of antibodies of certain pemphigoid diseases. Calibrators and patient sera are added to microwells coated with bullous pemphigoid (BP) BP180 and BP230 antigens, allowing antibodies to react with the immobilized antigens. After washing to remove any unbound serum proteins, horseradish peroxidase-conjugated IgG is added and incubated. Following another wash step, the peroxidase substrate is added and allowed to incubate for an additional period. Stop solution is then added to each well to cancel the enzyme reaction and to stabilize the color development. The assay can be quantified by measuring the reaction photometrically and plotting the results. The amount of antigen specific bound antibody is proportional to the color intensity.(Package inserts: Anti-BP180-NC16A-4X ELISA [IgG], Form EA_1502-2G_A_US_D04. EuroImmun; 07/08/2020; Anti-BP230-CF ELISA [IgG], Form EA_1502-1G_A_UK_C03.doc. EuroImmun; 10/23/2020)

Day(s) Performed

Varies

Report Available

1 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

83516 x 2

LOINC Code Information

Test ID Test Order Name Order LOINC Value
BPAB BP 180 and 230, Serum 92671-7

 

Result ID Test Result Name Result LOINC Value
606816 BP 180, S 53842-1
606817 BP 230, S 53843-9

Specimen Retention Time

30 days