A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice
IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite th...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Andrew G. Diamos [verfasserIn] Mary D. Pardhe [verfasserIn] Melissa H. Bergeman [verfasserIn] Aigerim S. Kamzina [verfasserIn] Michelle P. DiPalma [verfasserIn] Sara Aman [verfasserIn] Artemio Chaves [verfasserIn] Kenneth Lowe [verfasserIn] Jacquelyn Kilbourne [verfasserIn] Ian B. Hogue [verfasserIn] Hugh S. Mason [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2023 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: Frontiers in Immunology - Frontiers Media S.A., 2011, 14(2023) |
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| Übergeordnetes Werk: |
volume:14 ; year:2023 |
| Links: |
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| DOI / URN: |
10.3389/fimmu.2023.1085911 |
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| Katalog-ID: |
DOAJ08961626X |
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| 245 | 1 | 2 | |a A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice |
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| 520 | |a IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. | ||
| 650 | 4 | |a herpes simplex virus (HSV) | |
| 650 | 4 | |a vaccine | |
| 650 | 4 | |a immune complex (IC) | |
| 650 | 4 | |a plant-made | |
| 650 | 4 | |a complement receptor c1q | |
| 650 | 4 | |a neutralizing antibodies | |
| 653 | 0 | |a Immunologic diseases. Allergy | |
| 700 | 0 | |a Mary D. Pardhe |e verfasserin |4 aut | |
| 700 | 0 | |a Melissa H. Bergeman |e verfasserin |4 aut | |
| 700 | 0 | |a Aigerim S. Kamzina |e verfasserin |4 aut | |
| 700 | 0 | |a Michelle P. DiPalma |e verfasserin |4 aut | |
| 700 | 0 | |a Sara Aman |e verfasserin |4 aut | |
| 700 | 0 | |a Artemio Chaves |e verfasserin |4 aut | |
| 700 | 0 | |a Kenneth Lowe |e verfasserin |4 aut | |
| 700 | 0 | |a Jacquelyn Kilbourne |e verfasserin |4 aut | |
| 700 | 0 | |a Ian B. Hogue |e verfasserin |4 aut | |
| 700 | 0 | |a Hugh S. Mason |e verfasserin |4 aut | |
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10.3389/fimmu.2023.1085911 doi (DE-627)DOAJ08961626X (DE-599)DOAJ9d33a692d17b4c849b36e64b619e6dfd DE-627 ger DE-627 rakwb eng RC581-607 Andrew G. Diamos verfasserin aut A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. herpes simplex virus (HSV) vaccine immune complex (IC) plant-made complement receptor c1q neutralizing antibodies Immunologic diseases. Allergy Mary D. Pardhe verfasserin aut Melissa H. Bergeman verfasserin aut Aigerim S. Kamzina verfasserin aut Michelle P. DiPalma verfasserin aut Sara Aman verfasserin aut Artemio Chaves verfasserin aut Kenneth Lowe verfasserin aut Jacquelyn Kilbourne verfasserin aut Ian B. Hogue verfasserin aut Hugh S. Mason verfasserin aut In Frontiers in Immunology Frontiers Media S.A., 2011 14(2023) (DE-627)657998354 (DE-600)2606827-8 16643224 nnns volume:14 year:2023 https://doi.org/10.3389/fimmu.2023.1085911 kostenfrei https://doaj.org/article/9d33a692d17b4c849b36e64b619e6dfd kostenfrei https://www.frontiersin.org/articles/10.3389/fimmu.2023.1085911/full kostenfrei https://doaj.org/toc/1664-3224 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 |
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10.3389/fimmu.2023.1085911 doi (DE-627)DOAJ08961626X (DE-599)DOAJ9d33a692d17b4c849b36e64b619e6dfd DE-627 ger DE-627 rakwb eng RC581-607 Andrew G. Diamos verfasserin aut A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. herpes simplex virus (HSV) vaccine immune complex (IC) plant-made complement receptor c1q neutralizing antibodies Immunologic diseases. Allergy Mary D. Pardhe verfasserin aut Melissa H. Bergeman verfasserin aut Aigerim S. Kamzina verfasserin aut Michelle P. DiPalma verfasserin aut Sara Aman verfasserin aut Artemio Chaves verfasserin aut Kenneth Lowe verfasserin aut Jacquelyn Kilbourne verfasserin aut Ian B. Hogue verfasserin aut Hugh S. Mason verfasserin aut In Frontiers in Immunology Frontiers Media S.A., 2011 14(2023) (DE-627)657998354 (DE-600)2606827-8 16643224 nnns volume:14 year:2023 https://doi.org/10.3389/fimmu.2023.1085911 kostenfrei https://doaj.org/article/9d33a692d17b4c849b36e64b619e6dfd kostenfrei https://www.frontiersin.org/articles/10.3389/fimmu.2023.1085911/full kostenfrei https://doaj.org/toc/1664-3224 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 |
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10.3389/fimmu.2023.1085911 doi (DE-627)DOAJ08961626X (DE-599)DOAJ9d33a692d17b4c849b36e64b619e6dfd DE-627 ger DE-627 rakwb eng RC581-607 Andrew G. Diamos verfasserin aut A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. herpes simplex virus (HSV) vaccine immune complex (IC) plant-made complement receptor c1q neutralizing antibodies Immunologic diseases. Allergy Mary D. Pardhe verfasserin aut Melissa H. Bergeman verfasserin aut Aigerim S. Kamzina verfasserin aut Michelle P. DiPalma verfasserin aut Sara Aman verfasserin aut Artemio Chaves verfasserin aut Kenneth Lowe verfasserin aut Jacquelyn Kilbourne verfasserin aut Ian B. Hogue verfasserin aut Hugh S. Mason verfasserin aut In Frontiers in Immunology Frontiers Media S.A., 2011 14(2023) (DE-627)657998354 (DE-600)2606827-8 16643224 nnns volume:14 year:2023 https://doi.org/10.3389/fimmu.2023.1085911 kostenfrei https://doaj.org/article/9d33a692d17b4c849b36e64b619e6dfd kostenfrei https://www.frontiersin.org/articles/10.3389/fimmu.2023.1085911/full kostenfrei https://doaj.org/toc/1664-3224 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 |
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10.3389/fimmu.2023.1085911 doi (DE-627)DOAJ08961626X (DE-599)DOAJ9d33a692d17b4c849b36e64b619e6dfd DE-627 ger DE-627 rakwb eng RC581-607 Andrew G. Diamos verfasserin aut A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. herpes simplex virus (HSV) vaccine immune complex (IC) plant-made complement receptor c1q neutralizing antibodies Immunologic diseases. Allergy Mary D. Pardhe verfasserin aut Melissa H. Bergeman verfasserin aut Aigerim S. Kamzina verfasserin aut Michelle P. DiPalma verfasserin aut Sara Aman verfasserin aut Artemio Chaves verfasserin aut Kenneth Lowe verfasserin aut Jacquelyn Kilbourne verfasserin aut Ian B. Hogue verfasserin aut Hugh S. Mason verfasserin aut In Frontiers in Immunology Frontiers Media S.A., 2011 14(2023) (DE-627)657998354 (DE-600)2606827-8 16643224 nnns volume:14 year:2023 https://doi.org/10.3389/fimmu.2023.1085911 kostenfrei https://doaj.org/article/9d33a692d17b4c849b36e64b619e6dfd kostenfrei https://www.frontiersin.org/articles/10.3389/fimmu.2023.1085911/full kostenfrei https://doaj.org/toc/1664-3224 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 |
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A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice |
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IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. |
| abstractGer |
IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. |
| abstract_unstemmed |
IntroductionIt has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection.Materials and methodsIn this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice.ResultsgD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group.DiscussionThis work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform. |
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| title_short |
A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice |
| url |
https://doi.org/10.3389/fimmu.2023.1085911 https://doaj.org/article/9d33a692d17b4c849b36e64b619e6dfd https://www.frontiersin.org/articles/10.3389/fimmu.2023.1085911/full https://doaj.org/toc/1664-3224 |
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Mary D. Pardhe Melissa H. Bergeman Aigerim S. Kamzina Michelle P. DiPalma Sara Aman Artemio Chaves Kenneth Lowe Jacquelyn Kilbourne Ian B. Hogue Hugh S. Mason |
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Mary D. Pardhe Melissa H. Bergeman Aigerim S. Kamzina Michelle P. DiPalma Sara Aman Artemio Chaves Kenneth Lowe Jacquelyn Kilbourne Ian B. Hogue Hugh S. Mason |
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10.3389/fimmu.2023.1085911 |
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| up_date |
2024-07-03T23:55:40.715Z |
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