Plasmid encoding papillomavirus Type 16 (HPV16) DNA constructed with codon optimization improved the immunogenicity against HPV infection

Human papillomavirus Type 16 (HPV16) infections can cause neoplasia, which is thought to be closely associated with the development of cervical cancers. In the study, we attempted to construct a DNA plasmid encoding a HPV16 capsid protein (L1) and a HPV16 oncoprotein (E7), which was capable of preve...

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Veröffentlicht in:Vaccine 2004-12, Vol.23 (5), p.629-638
Hauptverfasser: Cheung, Ying-Kit, Cheng, Samuel Chak-Sum, Sin, Fion Wan-Yee, Xie, Yong
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container_issue 5
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creator Cheung, Ying-Kit
Cheng, Samuel Chak-Sum
Sin, Fion Wan-Yee
Xie, Yong
description Human papillomavirus Type 16 (HPV16) infections can cause neoplasia, which is thought to be closely associated with the development of cervical cancers. In the study, we attempted to construct a DNA plasmid encoding a HPV16 capsid protein (L1) and a HPV16 oncoprotein (E7), which was capable of preventing HPV16 infection and eliminating HPV16-infected cells. A plasmid, L1E7hpSCA1, encoding the L1 and E7 genes with the codon usage optimized for mammalian cell expression, was constructed. Mutations were introduced into the E7 gene sequence for reducing its oncogenicity. C57BL/6 mice were intramuscularly immunized at tibialis anterior (TA) muscles with the newly constructed L1E7hpSCA1 plasmid. The immune responses induced by the L1E7hpSCA1 plasmid (with codon optimization) and a control L1E7pSCA1 plasmid (without codon optimization) were compared. It is shown that the L1E7hpSCA1 was able to induce much stronger immune responses than the L1E7pSCA1. Sera obtained from immunized animals were found to contain anti-HPV16 antibodies as detected by ELISA and hemagglutination inhibition (HAI) assays. Cytotoxicity and interferon-γ assays showed that spleenocytes from immunized animals were able to recognize and lyze E7 expressing tumor TC-1 cells. Moreover, the growth of E7 expressing tumor mass was inhibited in vaccinated mice. In vivo tumor protection test indicated that tumor formation was prevented in the experimental animals (67%) after vaccination with L1E7hpSCA1, while for the control group injected with L1E7pSCA1 only and the animal group injected with pSCA1 only, tumor formation was observed in all experimental animals. Our results suggest that the L1E7h gene (with codon optimization) is more effective against HPV16 than the L1E7 gene (without codon optimization). The L1E7hpSCA1 plasmid was able to provide protection against E7 expressing tumor, and it might have the potential to be a vaccine candidate for HPV prevention.
doi_str_mv 10.1016/j.vaccine.2004.07.010
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In the study, we attempted to construct a DNA plasmid encoding a HPV16 capsid protein (L1) and a HPV16 oncoprotein (E7), which was capable of preventing HPV16 infection and eliminating HPV16-infected cells. A plasmid, L1E7hpSCA1, encoding the L1 and E7 genes with the codon usage optimized for mammalian cell expression, was constructed. Mutations were introduced into the E7 gene sequence for reducing its oncogenicity. C57BL/6 mice were intramuscularly immunized at tibialis anterior (TA) muscles with the newly constructed L1E7hpSCA1 plasmid. The immune responses induced by the L1E7hpSCA1 plasmid (with codon optimization) and a control L1E7pSCA1 plasmid (without codon optimization) were compared. It is shown that the L1E7hpSCA1 was able to induce much stronger immune responses than the L1E7pSCA1. Sera obtained from immunized animals were found to contain anti-HPV16 antibodies as detected by ELISA and hemagglutination inhibition (HAI) assays. Cytotoxicity and interferon-γ assays showed that spleenocytes from immunized animals were able to recognize and lyze E7 expressing tumor TC-1 cells. Moreover, the growth of E7 expressing tumor mass was inhibited in vaccinated mice. In vivo tumor protection test indicated that tumor formation was prevented in the experimental animals (67%) after vaccination with L1E7hpSCA1, while for the control group injected with L1E7pSCA1 only and the animal group injected with pSCA1 only, tumor formation was observed in all experimental animals. Our results suggest that the L1E7h gene (with codon optimization) is more effective against HPV16 than the L1E7 gene (without codon optimization). 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In the study, we attempted to construct a DNA plasmid encoding a HPV16 capsid protein (L1) and a HPV16 oncoprotein (E7), which was capable of preventing HPV16 infection and eliminating HPV16-infected cells. A plasmid, L1E7hpSCA1, encoding the L1 and E7 genes with the codon usage optimized for mammalian cell expression, was constructed. Mutations were introduced into the E7 gene sequence for reducing its oncogenicity. C57BL/6 mice were intramuscularly immunized at tibialis anterior (TA) muscles with the newly constructed L1E7hpSCA1 plasmid. The immune responses induced by the L1E7hpSCA1 plasmid (with codon optimization) and a control L1E7pSCA1 plasmid (without codon optimization) were compared. It is shown that the L1E7hpSCA1 was able to induce much stronger immune responses than the L1E7pSCA1. Sera obtained from immunized animals were found to contain anti-HPV16 antibodies as detected by ELISA and hemagglutination inhibition (HAI) assays. 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Cheng, Samuel Chak-Sum ; Sin, Fion Wan-Yee ; Xie, Yong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c450t-ce38febf15a6317cd2f123ae744c12a54b50b1f60bdd2ad4ca5db52a0b1c122a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Animals</topic><topic>Antibodies, Viral - blood</topic><topic>Applied microbiology</topic><topic>Biological and medical sciences</topic><topic>Capsid Proteins</topic><topic>Cervical cancer</topic><topic>Codon</topic><topic>Codon usage optimization</topic><topic>Cytotoxicity</topic><topic>Cytotoxicity Tests, Immunologic</topic><topic>Deoxyribonucleic acid</topic><topic>Disease Models, Animal</topic><topic>DNA</topic><topic>DNA vaccination</topic><topic>Enzyme-Linked Immunosorbent Assay</topic><topic>Female</topic><topic>Fundamental and applied biological sciences. 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In the study, we attempted to construct a DNA plasmid encoding a HPV16 capsid protein (L1) and a HPV16 oncoprotein (E7), which was capable of preventing HPV16 infection and eliminating HPV16-infected cells. A plasmid, L1E7hpSCA1, encoding the L1 and E7 genes with the codon usage optimized for mammalian cell expression, was constructed. Mutations were introduced into the E7 gene sequence for reducing its oncogenicity. C57BL/6 mice were intramuscularly immunized at tibialis anterior (TA) muscles with the newly constructed L1E7hpSCA1 plasmid. The immune responses induced by the L1E7hpSCA1 plasmid (with codon optimization) and a control L1E7pSCA1 plasmid (without codon optimization) were compared. It is shown that the L1E7hpSCA1 was able to induce much stronger immune responses than the L1E7pSCA1. Sera obtained from immunized animals were found to contain anti-HPV16 antibodies as detected by ELISA and hemagglutination inhibition (HAI) assays. Cytotoxicity and interferon-γ assays showed that spleenocytes from immunized animals were able to recognize and lyze E7 expressing tumor TC-1 cells. Moreover, the growth of E7 expressing tumor mass was inhibited in vaccinated mice. In vivo tumor protection test indicated that tumor formation was prevented in the experimental animals (67%) after vaccination with L1E7hpSCA1, while for the control group injected with L1E7pSCA1 only and the animal group injected with pSCA1 only, tumor formation was observed in all experimental animals. Our results suggest that the L1E7h gene (with codon optimization) is more effective against HPV16 than the L1E7 gene (without codon optimization). The L1E7hpSCA1 plasmid was able to provide protection against E7 expressing tumor, and it might have the potential to be a vaccine candidate for HPV prevention.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>15542183</pmid><doi>10.1016/j.vaccine.2004.07.010</doi><tpages>10</tpages></addata></record>
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identifier ISSN: 0264-410X
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language eng
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source MEDLINE; Elsevier ScienceDirect Journals Complete; ProQuest Central UK/Ireland
subjects Animals
Antibodies, Viral - blood
Applied microbiology
Biological and medical sciences
Capsid Proteins
Cervical cancer
Codon
Codon usage optimization
Cytotoxicity
Cytotoxicity Tests, Immunologic
Deoxyribonucleic acid
Disease Models, Animal
DNA
DNA vaccination
Enzyme-Linked Immunosorbent Assay
Female
Fundamental and applied biological sciences. Psychology
Genes
Hemagglutination Inhibition Tests
HPV16 infection
Human papillomavirus
Human papillomavirus 16
Immune system
Immunization
Immunogenicity
Interferon-gamma - analysis
Medical research
Medical sciences
Mice
Mice, Inbred C57BL
Microbiology
Miscellaneous
Muscles
Mutation
Oncogene Proteins, Viral - genetics
Oncogene Proteins, Viral - immunology
Papillomaviridae - genetics
Papillomavirus E7 Proteins
Papillomavirus Infections - prevention & control
Papillomavirus Infections - virology
Plasmids
Tumors
Uterine Cervical Neoplasms - prevention & control
Uterine Cervical Neoplasms - virology
Vaccines
Vaccines, antisera, therapeutical immunoglobulins and monoclonal antibodies (general aspects)
Vaccines, DNA - immunology
Viral Vaccines - genetics
Viral Vaccines - immunology
Virology
title Plasmid encoding papillomavirus Type 16 (HPV16) DNA constructed with codon optimization improved the immunogenicity against HPV infection
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