Authors: Gaofu, Qi; Rongyue, Cao; Dan, Mao; Xiuyun, Zhao; Xuejun, Wang; Jie, Wu; Jingjing, Liu

Source: Protein and Peptide Letters, Volume 13, Number 2, February 2006 , pp. 149-154(6)

Publisher: Bentham Science Publishers

Abstract:

The recombinant chimeric enzyme, AnsB-TTP-CETPC, comprising asparaginase, tetanus toxin helper T cell epitope and human CETP B cell epitope was expressed as A soluble protein in Escherichia coli. The purified chimeric enzyme exhibited approximate 83% activity of the native asparaginase. After immunization with three doses of chimeric enzyme, high titers of anti-CETP antibodies were induced and lasted more than eighteen weeks in mice, and could even be detected at A dilution of 1:12800 by normal ELISA assay. The specificity of anti-CETP antibody was verified by Western blot assay. After displaying on the surface of asparaginase, the weak antigenicity of CETP epitope was effectively overcome, there after A strong CETP-specific immune response was evoked in mice immunized with the chimeric enzyme. Histochemical analysis of mice kidney tissue showed that immunization with the chimeric enzyme did not cause any pathological changes in mice. Collectively, the chimeric enzyme may be further developed as A vaccine against atherosclerosis in the future.

Keywords: Asparaginase; CETP B cell epitope; tetanus toxin helper T cell epitope; atherosclerosis; vaccine

Document Type: Research article

DOI: http://dx.doi.org/10.2174/092986606775101689

Affiliations: 1: Biopharmaceutical College, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, Jiangsu, P.R. China.

Publication date: 2006-02-01

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• Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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