Antibody purification via affinity membrane chromatography method utilizing nucleotide binding site targeting with a...

Area of Science:

• Biotechnology
• Biochemistry
• Chromatography

Background:

• Antibody purification is crucial for therapeutic and diagnostic applications.
• Traditional methods like resin-based affinity chromatography have limitations.
• Developing efficient and scalable purification techniques is essential.

Purpose of the Study:

• To introduce and evaluate a novel membrane affinity chromatography technique (m-NBST) for antibody purification.
• To demonstrate the efficacy of using a small molecule (tryptamine) to capture antibodies via their nucleotide-binding site (NBS).
• To compare the performance of regenerated cellulose membrane matrices with traditional resin-based systems.

Main Methods:

• Development of the m-NBST method utilizing tryptamine immobilized on a regenerated cellulose membrane.
• Purification of Rituximab as a proof of concept from cell culture media.
• Optimization and evaluation of parameters including buffer conditions, flow rates, and elution gradients.
• Assessment of column reusability and stability.

Main Results:

• The m-NBST method demonstrated high efficiency (>98%) and purity (>98%) for Rituximab purification.
• Regenerated cellulose membrane offered advantages over traditional resin-based affinity systems.
• The method showed preservation of antibody antigen-binding activity post-purification.
• Successful evaluation of various parameters impacting purification performance.

Conclusions:

• The m-NBST technique is a highly efficient and scalable method for purifying monoclonal and polyclonal antibodies.
• This small molecule membrane affinity purification offers a promising alternative to conventional methods.
• The method's robustness and preservation of antibody function support its potential clinical and research utility.