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Related Concept Videos

Enzyme-Linked Immunosorbent Assay01:33

Enzyme-Linked Immunosorbent Assay

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In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or...
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A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes
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A novel click chemistry-based peptide ELISA protocol: development and technical evaluation.

Lisa Milchram1, Regina Soldo1, Valerie Regele1

  • 1Competence Unit Molecular Diagnostics, Center for Health and Bioresources, Austrian Institute of Technology, Giefinggasse 4, Vienna, 1210, Austria.

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|March 2, 2022
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Summary

This study presents a new indirect enzyme-linked immunosorbent assay (ELISA) method using peptides for antibody diagnostics. This peptide-based ELISA offers improved detection limits and reliability for clinical applications.

Keywords:
click chemistryimmunoprofilespeptide ELISAserology

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Area of Science:

  • Biotechnology
  • Immunodiagnostics
  • Analytical Chemistry

Background:

  • Enzyme-linked immunosorbent assay (ELISA) is the gold standard for antibody diagnostics.
  • Existing ELISA protocols are not readily adaptable for peptide antigens.
  • Peptide-based ELISA methods are scarce, limiting diagnostic capabilities.

Purpose of the Study:

  • To develop and technically characterize an indirect ELISA protocol utilizing peptides conjugated to a protein carrier.
  • To compare the performance of this novel peptide-ELISA with the established biotin-avidin system.
  • To assess the reproducibility and stability of the developed peptide-ELISA method.

Main Methods:

  • Peptides were conjugated onto a protein carrier (bovine serum albumin) using click chemistry.
  • The peptide-protein conjugates were immobilized onto standard plastic microplates.
  • An indirect ELISA was performed, and the limit of detection was compared to the biotin-avidin system.
  • Reproducibility and stability assays were conducted.

Main Results:

  • The peptide-based indirect ELISA achieved a slightly improved limit of detection for purified IgG (25-100 ng/well) compared to the biotin-avidin system (25-1000 ng/well).
  • The method demonstrated good reproducibility and stability, indicating its reliability for diagnostic purposes.
  • Successful immobilization of peptide conjugates onto standard plastics was achieved.

Conclusions:

  • Indirect ELISA using immunoreactive peptides conjugated to bovine serum albumin provides a reliable and adaptable method for antibody diagnostics.
  • This peptide-based ELISA serves as a valuable complement to existing diagnostic platforms.
  • The developed method enhances the utility of ELISA for novel peptide antigens.