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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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Advances in ELISA and other solid-phase immunoassays.

D M Kemeny1, S J Challacombe

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Enzyme-linked immunosorbent assay (ELISA) offers high sensitivity and ease of use, rivaling radioisotope methods. Understanding ELISA

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Area of Science:

  • Immunology
  • Biochemistry

Background:

  • Solid-phase immunoassays are gaining popularity due to increased sensitivity and ease of use.
  • Enzyme-linked immunosorbent assay (ELISA) is rapidly growing due to its advantages over radioisotope-based methods.

Purpose of the Study:

  • To highlight the growing importance and application of ELISA in immunological testing.
  • To discuss the performance characteristics of ELISA compared to solid-phase immunoradiometric assay (SPIRMA).

Main Methods:

  • Review of recent developments in solid-phase immunoassay techniques.
  • Comparison of ELISA sensitivity and performance with SPIRMA.

Main Results:

  • ELISA demonstrates sensitivity equal to or greater than SPIRMA.
  • Established rules for SPIRMA are often not applied or are ignored in ELISA protocols.

Conclusions:

  • ELISA is a highly sensitive and user-friendly immunological test.
  • Further research and adherence to specific guidelines are needed for optimal ELISA implementation.