Volume 31, Issue 4 e2689
RESEARCH ARTICLE

Identification and characterization of antibodies elicited by human cystatin C fragment

Izabela Behrendt

Izabela Behrendt

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

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Martyna Prądzińska

Martyna Prądzińska

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

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Marta Spodzieja

Marta Spodzieja

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

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Paulina Czaplewska

Paulina Czaplewska

Intercollegiate Faculty of Biotechnology, University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland

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Aleksandra S. Kołodziejczyk

Aleksandra S. Kołodziejczyk

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

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Aneta Szymańska

Aneta Szymańska

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

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Franciszek Kasprzykowski

Franciszek Kasprzykowski

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

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Susanna L. Lundström

Susanna L. Lundström

Department of Medical Biochemistry and Biophysics, Division of Physiological Chemistry, Karolinska Institutet, Stockholm, Sweden

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Roman A. Zubarev

Roman A. Zubarev

Department of Medical Biochemistry and Biophysics, Division of Physiological Chemistry, Karolinska Institutet, Stockholm, Sweden

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Sylwia Rodziewicz-Motowidło

Corresponding Author

Sylwia Rodziewicz-Motowidło

Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland

Correspondence

Sylwia Rodziewicz-Motowidło, Faculty of Chemistry of the University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.

Email: [email protected]

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First published: 05 December 2017
The work was performed at the University of Gdańsk (Poland) and at the Karolinska Institutet (Sweden).

Abstract

Amyloid formation is associated with a number of neurodegenerative diseases that affect the independence and quality of life of aging populations. One of rather atypical, occurring at a young age amyloidosis is hereditary cystatin C amyloid angiopathy (HCCAA) related to aggregation of L68Q variant of human cystatin C (hCC). Human cystatin C plays a very important role in many aspects of human health; however, its amyloidogenic properties manifested in HCCAA present a real, lethal threat to some populations and any work on factors that can affect possible influencing hCC aggregation is not to overestimate. It was proved that interaction of hCC with monoclonal antibodies suppresses significantly hCC dimerization process. Therefore, immunotherapy seems to be the right approach toward possible HCCAA treatment. In this work, the hCC fragment encompassing residue 60-70 (in 2 variants: linear peptide and multiple antigenic peptide) was used as an immunogen in rabbit immunization. As a result, specific anti-hCC antibodies were found in both rabbit sera. Surprisingly, rabbit antibodies were obtained after immunization with only a short peptide. The obtained antibodies were characterized, and their influence on the aggregation propensity of the hCC molecules was evaluated. The antibodies turned out not to have any significant influence on the cystatin C dimerization process. Nevertheless, we hope that antibodies elicited in rabbits by other hCC fragments could lead to elaboration of effective treatment against HCCAA.

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