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Related Experiment Videos

Evaluation of complement activity by an enzyme immunoassay

M L Rossi Devivo1, E L Romano, G Suárez

  • 1Laboratory of Pathophysiology, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas.

International Archives of Allergy and Immunology
|January 1, 1993
PubMed
Summary

A new ELISA assay measures complement activity in serum using aggregated human IgG. This method differentiates normal and low complement levels in patients, including those with systemic lupus erythematosus.

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Area of Science:

  • Immunology
  • Biochemistry

Background:

  • Complement activity is crucial for immune response.
  • Assessing complement levels aids in diagnosing and managing immune-related diseases.

Purpose of the Study:

  • To develop and validate an Enzyme-Linked Immunosorbent Assay (ELISA)-type assay for evaluating serum complement activity.
  • To establish normal complement values and assess its utility in differentiating complement levels in patients with systemic lupus erythematosus.

Main Methods:

  • Coating microwells with aggregated human IgG (IgGn) to initiate complement activation.
  • Incubating serum dilutions with coated wells, followed by detection using a peroxidase-labeled antihuman C3c antibody and ABTS substrate.
  • Evaluating complement components up to C3 splitting.

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Main Results:

  • The assay successfully measured complement activity in serum.
  • Normal complement values were established in healthy volunteers.
  • The assay differentiated between normal and low complement levels in patients with systemic lupus erythematosus.

Conclusions:

  • This ELISA assay provides a reliable method for assessing serum complement activity.
  • It is a valuable tool for clinical diagnostics, particularly in differentiating complement levels in systemic lupus erythematosus patients.