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Updated: Feb 2, 2026
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Denaturing Gradient Gel Electrophoresis DGGE
Published on: February 25, 2007
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Isoelectric Focusing on Non-Denaturing Flatbed Gels
Biji T Kurien1,2,3, R Hal Scofield4,5,6
1Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA. biji-kurien@omrf.org.
Methods in Molecular Biology (Clifton, N.J.)
|November 15, 2018
Summary
This study used isoelectric focusing (IEF) to track antibody changes in a patient with systemic lupus erythematosus (SLE). The method identified specific antibody clonotypes targeting the Ro 60 autoantigen over time.
Area of Science:
- Immunology
- Protein Chemistry
- Autoimmunity
Background:
- Isoelectric focusing (IEF) is a key technique for protein separation and characterization.
- Antibody clonotype analysis is crucial for understanding immune responses and autoimmune diseases.
Purpose of the Study:
- To investigate antibody clonotype alterations in a patient with systemic lupus erythematosus (SLE).
- To analyze the development of autoantibodies against the Ro 60 autoantigen over several years.
Main Methods:
- Utilized a sensitive native flatbed isoelectric focusing (IEF) technique.
- Analyzed serial patient serum samples collected over an extended observation period.
- Employed affinity immunoblotting with Ro 60-coated nitrocellulose membranes for detection.
Main Results:
- Demonstrated the capability of flatbed IEF to resolve specific antibody clonotypes.
- Observed changes in anti-Ro 60 antibody clonotypes in the SLE patient.
- Confirmed oligoclonality of anti-Ro 60 antibodies in the patient's sera.
Conclusions:
- Native flatbed IEF is a valuable method for studying dynamic changes in antibody clonotypes.
- This approach can characterize autoantibody responses in autoimmune conditions like SLE.
- The study provides insights into the clonal evolution of autoantibodies against Ro 60.
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