ANA Profile 8 IgG EULISA

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A positive ANA screening test result provides presumptive evidence for systemic rheumatic disease. The EULISA ANA Profile 8 IgG offers further definition of specific antibody profiles and is a valuable aid in the diagnostic process.

Product code
213096
Format
ELISA
Tests
Break apart micro titration strips (12x8) 96 wells
Calculation
Qualitative, index
Antigen
Antigen mixture
Units
Ratio
Incubation time
30+30+30 min
Detection system
HRP/450 nm
Availability
CE marked. Not for sale in US

Intended use

Enzyme immunoassay for the detection of autoantibodies IgG against dsDNA, RNP, Sm, Ro (SS-A), La (SS-B), Scl-70, CENP-B and Jo-1.

Background

Circulating autoantibodies against various intracellular antigens (antinuclear antibodies, ANA) are characteristic for systemic, autoimmune-mediated rheumatic diseases of the connective tissue. These comprise Systemic Lupus Erythematosus (SLE), Mixed Connective Tissue Disease (MCTD), Sjögren's Syndrome (SS) A and B, Progressive Systemic Sclerosis (PSS, Scleroderma)/CREST syndrome and Polymyositis (PM).

The diagnosis of the above disorders is often difficult, due to overlapping symptoms, and therefore usually supported by measuring their associated auto-antibodies.

In the EULISA ANA Profile 8 IgG, eight antigens specifically recognised by these antibodies are immobilised, line by line, on the solid phase (reference: Instructions for use):

Antigen Source Disease

Autoantibody prevalence

dsDNA Plasmid SLE 60 - 90 %
RNP (proteins A, C, 68kDa)

Recombinant

MCTD
95 %
    SLE 30 - 40 %
    PM 14 %
    SS 4 %
Sm (proteins B, B', D) Bovine thymus SLE 12 - 39 %
    MCTD 7 %
SS-A/Ro (60kDa-protein) Bovine thymus SS 60 - 100 %
    SLE 45 - 50 %
    MCTD 15 - 30 %
    PSS 5 - 7 %
    PM 5 - 7 %
SS-B/La Recombinant SS 30 - 90 %
    SLE 15 - 30 %
    MCTD 5 - 15 %
Scl-70 (DNA-topoisomerase 1) Recombinant PSS 20 - 76 %
CENP-B (centromere protein B) Recombinant CREST 40 - 80 %
Jo-1 (Histidyl-tRNA-synthetase) Recombinant PM 20 - 40 %

Technical information

The test is designed for the individual, qualitative determination of IgG autoantibodies in human serum, directed against one or several of the above antigens. The test is fast (incubation time 30-30-30 minutes) and flexible (8-well strips, 1-12 analyses, ready-to-use reagents). A negative and a positive control are used to check assay performance. The positive control also serves as calibrator for assay evaluation.

Kit components and storage of reagents

Contents of the kit

  1. One microwell plate, coated line by line with eight individual autoantigens and hermetically packed in a foil laminate pouch together with a desiccant bag.
  1. Sample buffer, 100 mL, ready-to-use, orange coloured.
  1. Wash buffer, 100 mL, 10 x-concentrate, blue coloured.
  1. Negative and positive control, 3.0 mL each, ready-to-use, green and red coloured, respectively.
  1. Anti-human IgG HRP conjugate, 14 mL, ready-to-use, red coloured.
  1. Substrate solution, 14 mL, ready-to-use, colourless.
  1. Stop solution (0.5 M H2SO4), 14 mL, colourless, ready-to-use.
  1. Directions for use
  1. Lot-specific certificate of analysis

All kit components are stored at 2 - 8°C.