Quantitation of serum immunoglobulins

Area of Science:

• Clinical Chemistry
• Immunology
• Analytical Biochemistry

Background:

• Accurate quantitation of immunoglobulins is crucial for diagnosing and monitoring various diseases.
• Numerous techniques exist for immunoglobulin measurement, each with unique advantages and limitations.

Purpose of the Study:

• To critically review and compare current "state of the art" methodologies for immunoglobulin quantitation.
• To analyze the strengths, weaknesses, and sources of error for each technique.
• To provide guidance on selecting appropriate methods for different laboratory settings.

Main Methods:

• Review of solution-based techniques (immunoprecipitin, nephelometry, rate analysis, radioimmunoassay).
• Analysis of radial diffusion techniques in agarose gels.
• Evaluation of solid-phase techniques (fluoroimmunometric assays, solid phase radioimmunoassays).

Main Results:

• Detailed theoretical presentation and critical analysis of each method's performance characteristics (accuracy, precision, sensitivity).
• Comparison of techniques based on cost, feasibility, and ease of handling.
• Identification of common problems related to antisera, standards, and quality control.

Conclusions:

• No single method is universally superior; selection depends on laboratory resources and specific needs.
• Addressing issues with reagents and quality control is essential for reliable immunoglobulin quantitation.
• The review provides a framework for informed decision-making in immunoglobulin assay selection and implementation.