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Related Concept Videos

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Related Experiment Video

Updated: Dec 3, 2025

Development of an in vitro model system for studying the interaction of Equus caballus IgE with its high-affinity receptor Fc&#949;RI
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Lectin Affinity Chromatography: An Efficient Method to Purify Horse IgG3.

Salvatore G De-Simone1,2,3, David W Provance4,5

  • 1FIOCRUZ, Center for Technological Development in Health (CDTS)/National Institute of Science and Technology for Innovation on Neglected of Population Diseases (INCT-INDP), Rio de Janeiro, RJ, Brazil. dsimone@cdts.fiocruz.br.

Methods in Molecular Biology (Clifton, N.J.)
|October 31, 2020
PubMed
Summary
This summary is machine-generated.

Lectins enable affinity chromatography for purifying horse IgG3 (hoIgG3) by targeting unique glycosylation patterns. This method aids in therapeutic antibody isolation and understanding hypersensitivity biomarkers.

Keywords:
Affinity chromatographyHorse IgG3Human IgEJacalin-sepharosePurificationThermophoresis

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Area of Science:

  • Biochemistry
  • Immunology
  • Biotechnology

Background:

  • Affinity chromatography utilizes specific binding interactions between ligands and binding partners for separation.
  • Lectins, plant-derived molecules binding specific sugars, are key ligands for purifying glycosylated biomolecules.
  • Glycosylation is a common post-translational modification affecting approximately one-third of all proteins, influencing biological functions.

Purpose of the Study:

  • To describe a method for separating horse antibody classes using affinity chromatography.
  • To purify horse IgG3 (hoIgG3) from equine sera in a single step.
  • To determine the affinity interaction constant between human IgE and purified hoIgG3.

Main Methods:

  • Affinity chromatography employing an Artocarpus integrifolia Jacalin column.
  • Utilizing differences in glycosylation patterns for antibody separation.
  • Single-step purification of hoIgG3 from equine sera.

Main Results:

  • Successful single-step purification of hoIgG3 from other equine immunoglobulins.
  • Demonstrated the utility of Jacalin lectin affinity chromatography for antibody class separation based on glycosylation.
  • Determined the affinity interaction constant for a specific antibody-IgE interaction.

Conclusions:

  • Affinity chromatography with Jacalin is an effective method for purifying hoIgG3.
  • This purified hoIgG3 can be used for passive antibody therapy and as a hypersensitivity biomarker.
  • The method provides insights into glycosylation-dependent interactions relevant to biological phenomena.