Purification of IgG against ribonucleoprotein by a homemade immunoaffinity chromatography column for rabies diagnosis
| Autor: | Iana Suly Santos Katz, Jaqueline Helena da Silva Santos, Gabriela Hidaka da Silva, Fernanda Guedes, Elaine Raniero Fernandes, Keila Iamamoto, Sandriana dos Ramos Silva, Andréa de Cássia Rodrigues da Silva |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
medicine.drug_class Rabies Immunology Monoclonal antibody medicine.disease_cause Antibodies Viral Sensitivity and Specificity Chromatography Affinity Cell Line 03 medical and health sciences 0302 clinical medicine Dogs Antigen Affinity chromatography Species Specificity Chiroptera medicine Immunology and Allergy Animals Avidity Horses Direct fluorescent antibody Antigens Viral Ammonium sulfate precipitation Chromatography biology Chemistry Rabies virus Antibodies Monoclonal Haplorhini 030104 developmental biology Ribonucleoproteins Polyclonal antibodies Antibodies Antinuclear Immunoglobulin G biology.protein Cats Cattle 030215 immunology |
| Zdroj: | Journal of immunological methods. 471 |
| ISSN: | 1872-7905 |
| Popis: | Polyclonal or monoclonal antibodies against rabies virus ribonucleoprotein (RNP) conjugated to fluorescein isothiocyanate (FITC) have been employed for Rabies virus (RABV) antigen detection by the direct fluorescent antibody test (DFA). To date, these biomolecules have been purified by traditional methods such as precipitation by ammonium sulfate or ion exchange chromatography followed by ammonium sulfate precipitation, which allows only for partial detection of the protein of interest. In this study, we aimed to purify anti-RNP polyclonal horse IgG antibodies by cation-exchange chromatography in combination with a homemade immunoaffinity chromatography on RNP immobilized (RNP-IAC). Furthermore, to evaluate the accuracy of the prepared anti-RNP IgG fluorescent antibody in diagnostic purposes, DFA was applied for RABV antigen detection in suspected brain samples of different animal species. The combination of these two techniques made it possible to obtain antibodies with high selectivity and purity. Compared with the performance of the traditional method, anti-RNP IgG antibodies purified by RNP-IAC can be obtained from a smaller volume of hyperimmune serum and with greater avidity. Furthermore, the results obtained by DFA analyses revealed that the prepared anti-RNP IgG fluorescent antibody achieved 100% diagnostic specificity and sensitivity for RABV antigen detection. Thus, two-technique chromatographic, including RNP-IAC technology could be appropriate methods for the purification of polyclonal anti-RNP IgG for the use as a diagnostic reagent for rabies. |
| Databáze: | OpenAIRE |
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