Immunoassay. Development and directions in antibody technology.

Area of Science:

• Biochemistry
• Immunology
• Analytical Chemistry

Background:

• Immunoassays are crucial diagnostic tools.
• Historically, naturally occurring antibodies and serum-binding proteins were used, but low affinities limited applications.
• Polyclonal antibodies, produced in animals, became standard due to high affinity and specificity.

Purpose of the Study:

• To review advancements in immunoassay techniques.
• To highlight the role of specific binding reagents in these improvements.
• To discuss the transition from polyclonal to monoclonal antibodies in immunoassays.

Main Methods:

• Review of scientific literature on immunoassay development.
• Analysis of the properties and applications of different binding reagents (natural antibodies, polyclonal antibodies, monoclonal antibodies).
• Comparison of the advantages and limitations of various antibody types in immunoassay.

Main Results:

• Significant improvements in immunoassay techniques are linked to enhanced binding reagents.
• Monoclonal antibodies offer superior specificity, ease of use, and consistent supply compared to polyclonal antibodies.
• While currently limited to 50 analytes by FDA-approved reagents, monoclonal antibody-based immunoassays show potential for widespread future use.

Conclusions:

• Advancements in binding reagents, particularly monoclonal antibodies, are driving innovation in immunoassay technology.
• Monoclonal antibodies are poised to become the preferred reagents for immunoassays due to their performance and scalability.
• The future of immunoassays includes broader applications and standardization, facilitated by monoclonal antibody development.