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Production-scale purification of the recombinant major house dust mite allergen Der f 2 mutant C8/119S

A WHO position paper states that allergen immunotherapy is an effective treatment for allergic diseases, and well characterized allergens should be used in immunotherapy. The house dust mite is a major cause of allergic disease. However, the biological activity of the mite extracts currently used ca...

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Published in:Journal of bioscience and bioengineering 2010-11, Vol.110 (5), p.597-601
Main Authors: Koyanagi, Satoshi, Murakami, Toshio, Maeda, Toshihiro, Kawatsu, Kenjirou, Okamura, Hiroshi, Oda, Yoshiaki, Miyatsu, Yoshinobu, Sugawara, Keishin, Mizokami, Hiroshi
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creator Koyanagi, Satoshi
Murakami, Toshio
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Miyatsu, Yoshinobu
Sugawara, Keishin
Mizokami, Hiroshi
description A WHO position paper states that allergen immunotherapy is an effective treatment for allergic diseases, and well characterized allergens should be used in immunotherapy. The house dust mite is a major cause of allergic disease. However, the biological activity of the mite extracts currently used cannot be clearly determined, since these extracts contain various impurities. The use of recombinant allergens can avoid this problem. However, there remains a risk of contamination by other impurities, such as host cell-derived proteins (HCPs). Advanced purification techniques are thus required to remove these contaminants. C8/119S is a mutant of the major house dust mite allergen Der f 2, and is expressed and accumulated as an inclusion body in Escherichia coli. The C8/119S was refolded and purified through three column chromatography steps. Using this method, we could obtain about 2 g of the purified C8/119S in one purification batch. This amount is equivalent to 100,000 of the maintenance doses required for immunotherapy based on the WHO position paper. The purity of the C8/119S was 99% or more. The antigenicity of HCPs in the C8/119S was examined by passive cutaneous anaphylaxis assays. When the C8/119S was administered at 40 μg/kg, no local anaphylaxis was observed. C8/119S was thus highly purified with an extremely low level of impurities, and our procedure was shown to be an effective advanced production-scale purification process for this Der f 2 mutant. In this study, we established an advanced purification processes for C8/119S, then characterized the purified C8/119S and evaluated its purity.
doi_str_mv 10.1016/j.jbiosc.2010.05.010
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The antigenicity of HCPs in the C8/119S was examined by passive cutaneous anaphylaxis assays. When the C8/119S was administered at 40 μg/kg, no local anaphylaxis was observed. C8/119S was thus highly purified with an extremely low level of impurities, and our procedure was shown to be an effective advanced production-scale purification process for this Der f 2 mutant. 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The antigenicity of HCPs in the C8/119S was examined by passive cutaneous anaphylaxis assays. When the C8/119S was administered at 40 μg/kg, no local anaphylaxis was observed. C8/119S was thus highly purified with an extremely low level of impurities, and our procedure was shown to be an effective advanced production-scale purification process for this Der f 2 mutant. In this study, we established an advanced purification processes for C8/119S, then characterized the purified C8/119S and evaluated its purity.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><pmid>20547344</pmid><doi>10.1016/j.jbiosc.2010.05.010</doi><tpages>5</tpages></addata></record>
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ispartof Journal of bioscience and bioengineering, 2010-11, Vol.110 (5), p.597-601
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subjects Amino Acid Sequence
Amino Acid Substitution
Animals
Antigenicity
Antigens, Dermatophagoides - genetics
Antigens, Dermatophagoides - immunology
Antigens, Dermatophagoides - isolation & purification
Arthropod Proteins
Biological and medical sciences
Biotechnology
C8/119S
Chromatography, High Pressure Liquid
Der f 2
Dermatophagoides
Dermatophagoides farinae - genetics
Dermatophagoides farinae - immunology
Dermatophagoides pteronyssinus
Desensitization, Immunologic
Electrophoresis, Polyacrylamide Gel
Escherichia coli
Escherichia coli - genetics
Fundamental and applied biological sciences. Psychology
Guinea Pigs
Humans
Immunotherapy
Male
Mass Spectrometry
Molecular Sequence Data
Mutagenesis, Site-Directed
Mutation
Passive Cutaneous Anaphylaxis
PCA
Rabbits
Recombinant Proteins - genetics
Recombinant Proteins - immunology
Recombinant Proteins - isolation & purification
title Production-scale purification of the recombinant major house dust mite allergen Der f 2 mutant C8/119S
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