Prokaryotic Expression, Purification and Immunogenicity in Rabbits of the Small Antigen of Hepatitis Delta Virus

Hepatitis delta virus (HDV) is a viroid-like blood-borne human pathogen that accompanies hepatitis B virus infection in 5% patients. HDV has been studied for four decades; however, the knowledge on its life-cycle and pathogenesis is still sparse. The studies are hampered by the absence of the commer...

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Veröffentlicht in:International journal of molecular sciences 2016-10, Vol.17 (10), p.1721-1721
Hauptverfasser: Tunitskaya, Vera L, Eliseeva, Olesja V, Valuev-Elliston, Vladimir T, Tyurina, Daria A, Zakirova, Natalia F, Khomich, Olga A, Kalis, Martins, Latyshev, Oleg E, Starodubova, Elizaveta S, Ivanova, Olga N, Kochetkov, Sergey N, Isaguliants, Maria G, Ivanov, Alexander V
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container_issue 10
container_start_page 1721
container_title International journal of molecular sciences
container_volume 17
creator Tunitskaya, Vera L
Eliseeva, Olesja V
Valuev-Elliston, Vladimir T
Tyurina, Daria A
Zakirova, Natalia F
Khomich, Olga A
Kalis, Martins
Latyshev, Oleg E
Starodubova, Elizaveta S
Ivanova, Olga N
Kochetkov, Sergey N
Isaguliants, Maria G
Ivanov, Alexander V
description Hepatitis delta virus (HDV) is a viroid-like blood-borne human pathogen that accompanies hepatitis B virus infection in 5% patients. HDV has been studied for four decades; however, the knowledge on its life-cycle and pathogenesis is still sparse. The studies are hampered by the absence of the commercially-available HDV-specific antibodies. Here, we describe a set of reproducible methods for the expression in of His-tagged small antigen of HDV (S-HDAg), its purification, and production of polyclonal anti-S-HDAg antibodies in rabbits. S-HDAg was cloned into a commercial vector guiding expression of the recombinant proteins with the C-terminal His-tag. We optimized S-HDAg protein purification procedure circumventing a low affinity of the His-tagged S-HDAg to the Ni-nitrilotriacetyl agarose (Ni-NTA-agarose) resin. Optimization allowed us to obtain S-HDAg with >90% purity. S-HDAg was used to immunize Shinchilla grey rabbits which received 80 μg of S-HDAg in two subcutaneous primes in the complete, followed by four 40 μg boosts in incomplete Freunds adjuvant. Rabbits were bled two weeks post each boost. Antibody titers determined by indirect ELISA exceeded 10⁷. Anti-S-HDAg antibodies detected the antigen on Western blots in the amounts of up-to 100 pg. They were also successfully used to characterize the expression of S-HDAg in the eukaryotic cells by immunofluorescent staining/confocal microscopy.
doi_str_mv 10.3390/ijms17101721
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HDV has been studied for four decades; however, the knowledge on its life-cycle and pathogenesis is still sparse. The studies are hampered by the absence of the commercially-available HDV-specific antibodies. Here, we describe a set of reproducible methods for the expression in of His-tagged small antigen of HDV (S-HDAg), its purification, and production of polyclonal anti-S-HDAg antibodies in rabbits. S-HDAg was cloned into a commercial vector guiding expression of the recombinant proteins with the C-terminal His-tag. We optimized S-HDAg protein purification procedure circumventing a low affinity of the His-tagged S-HDAg to the Ni-nitrilotriacetyl agarose (Ni-NTA-agarose) resin. Optimization allowed us to obtain S-HDAg with &gt;90% purity. S-HDAg was used to immunize Shinchilla grey rabbits which received 80 μg of S-HDAg in two subcutaneous primes in the complete, followed by four 40 μg boosts in incomplete Freunds adjuvant. Rabbits were bled two weeks post each boost. 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subjects Animals
Antibodies, Viral - biosynthesis
Antibodies, Viral - blood
Antibodies, Viral - immunology
Cell Line
Cloning, Molecular
Communication
Enzyme-Linked Immunosorbent Assay
Escherichia coli
Escherichia coli - genetics
Escherichia coli - metabolism
Female
Fluorescent Antibody Technique
Hepatitis B virus
Hepatitis D virus
Hepatitis delta Antigens - biosynthesis
Hepatitis delta Antigens - immunology
Hepatitis delta virus
Hepatitis Delta Virus - genetics
Hepatitis Delta Virus - immunology
Humans
Immunization
Protein expression
Rabbits
Recombinant Proteins - genetics
Recombinant Proteins - metabolism
RNA, Viral - genetics
title Prokaryotic Expression, Purification and Immunogenicity in Rabbits of the Small Antigen of Hepatitis Delta Virus
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