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[Three-step purification of preparative-scale antiCD20 (Fab')2]
Jin-Hong Wang1, Ming Yang, Dong-Mei Fan
1State Key Laboratory of Experimental Hematology, Institute of Hematology, CAMS and PUMC, Tianjin 300020, China.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
|November 26, 2008
Summary
A new three-step purification method efficiently yields high-purity preparative-scale anti-CD20 (Fab')2. This method ensures antigen-binding activity comparable to existing techniques, offering a simpler approach for antibody fragment production.
Area of Science:
- Biochemistry
- Immunology
- Protein Purification
Background:
- Anti-CD20 (Fab")2 antibodies are crucial for therapeutic applications, necessitating efficient purification methods.
- Existing purification techniques may be complex or less scalable for preparative applications.
Purpose of the Study:
- To develop and validate a simplified, three-step purification protocol for preparative-scale anti-CD20 (Fab")2.
- To assess the purity and antigen-binding activity of the purified anti-CD20 (Fab")2.
Main Methods:
- Extraction of anti-CD20 (Fab")2 using a hyperosmotic solution.
- Sequential purification utilizing CM sepharose FF, phenyl sepharose FF, and protein G sepharose FF chromatography.
- Utilized AKTA prime system for preparative-scale chromatography.
Main Results:
- Successfully purified approximately 8 mg of anti-CD20 (Fab")2 with a high purity of 96.678%.
- The antigen-binding activity of the purified anti-CD20 (Fab")2 was comparable to that obtained via traditional protein G sepharose FF and S-100 methods.
- Demonstrated the efficacy of the three-step chromatographic approach.
Conclusions:
- The established three-step purification method provides a straightforward and effective means to obtain high-purity, preparative-scale anti-CD20 (Fab")2.
- This method offers a simplified alternative for producing functional anti-CD20 (Fab")2 fragments.
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