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Rapid high-performance affinity chromatography on micropellicular sorbents.

L Várady1, K Kalghatgi, C Horváth

  • 1Department of Chemical Engineering, Yale University, New Haven, CT 06520.

Journal of Chromatography
|December 23, 1988
PubMed
Summary
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Biospecific interaction chromatography using short columns with Protein A or lectin enables rapid separation and quantitation of immunoglobulins and glycoproteins in under 3 minutes. This method offers high sensitivity and adsorption capacity for both analytical and preparative applications.

Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Chromatography

Background:

  • Biospecific interaction chromatography utilizes ligands immobilized on stationary phases for selective analyte binding.
  • Traditional methods for immunoglobulin and glycoprotein analysis can be time-consuming.
  • Development of rapid and sensitive chromatographic techniques is crucial for efficient biomolecule analysis.

Purpose of the Study:

  • To develop a fast and sensitive method for the separation and quantitation of immunoglobulins and glycoproteins.
  • To evaluate the performance of short columns packed with micropellicular affinity sorbents.
  • To explore the potential of these columns for both analytical and preparative chromatography.

Main Methods:

  • Utilized short columns (30 x 4.6 mm I.D.) packed with 2-micron fluid-impervious silica microspheres functionalized with Protein A or lectins.

Related Experiment Videos

  • Employed stepwise and linear gradient elution techniques with various buffer systems (citrate, MES-HEPES-acetic acid) and salt concentrations.
  • Applied affinity chromatography with micropellicular concanavalin A and wheat germ agglutinin for specific glycoprotein analysis.

    • Main Results:

    • Achieved total analysis times, including reequilibration, of under 3 minutes for immunoglobulin and glycoprotein separation.
    • Demonstrated high sensitivity for human IgG assay with a linear calibration curve from 0.5-40 micrograms.
    • Successfully separated human IgG subclasses within 3 minutes using a specific buffer system and optimized elution conditions.
    • Showcased rapid affinity chromatography of horseradish peroxidase and fetuin.
    • Observed a high adsorption capacity for micropellicular Protein A (4.5 mg human IgG/ml), suitable for preparative applications.

    Conclusions:

    • Micropellicular affinity sorbents enable fast, sensitive, and high-performance liquid chromatographic analysis via biospecific interaction chromatography.
    • The developed method is effective for both rapid analytical quantitation and potentially for preparative protein chromatography.
    • This approach significantly reduces analysis time while maintaining high sensitivity and capacity.