Prevalence of specific neutralizing antibodies against Sendai virus in populations from different geographic areas: Implications for AIDS vaccine development using Sendai virus vectors
A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and antigenically related to human parainfluenza virus type 1 (hPIV-1), it is important to determine whether pre-existing hPIV-1 antibodies will aff...
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Published in | Human vaccines Vol. 7; no. 6; pp. 639 - 645 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , |
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Language | English |
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Taylor & Francis
01.06.2011
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Abstract | A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and antigenically related to human parainfluenza virus type 1 (hPIV-1), it is important to determine whether pre-existing hPIV-1 antibodies will affect immune responses elicited by a SeV vector-based vaccine. To quantify SeV neutralizing antibodies (NAb) in human serum, a sensitive virus neutralization assay was developed using a SeV vector encoding green fluorescent protein. Samples from 255 HIV-uninfected subjects from Africa, Europe, United States, and Japan, as well as from 12 confirmed hPIV-1-infected patients, were analyzed. SeV NAb titers did not vary significantly after serum was treated with receptor-destroying enzyme, indicating that non-specific hemagglutination inhibitors did not affect the assay sensitivity. A significant correlation was observed between hPIV-1 ELISA and SeV NAb titers. SeV NAb were detected in 92.5% subjects with a median titer of 60.6 and values ranging from 5.9- 11,324. The majority had titers |
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AbstractList | A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and antigenically related to human parainfluenza virus type 1 (hPIV-1), it is important to determine whether pre-existing hPIV-1 antibodies will affect immune responses elicited by a SeV vector-based vaccine. To quantify SeV neutralizing antibodies (NAb) in human serum, a sensitive virus neutralization assay was developed using a SeV vector encoding green fluorescent protein. Samples from 255 HIV-uninfected subjects from Africa, Europe, United States, and Japan, as well as from 12 confirmed hPIV-1-infected patients, were analyzed. SeV NAb titers did not vary significantly after serum was treated with receptor-destroying enzyme, indicating that non-specific hemagglutination inhibitors did not affect the assay sensitivity. A significant correlation was observed between hPIV-1 ELISA and SeV NAb titers. SeV NAb were detected in 92.5% subjects with a median titer of 60.6 and values ranging from 5.9- 11,324. The majority had titers A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and antigenically related to human parainfluenza virus type 1 (hPIV-1), it is important to determine whether pre-existing hPIV-1 antibodies will affect immune responses elicited by a SeV vector-based vaccine. To quantify SeV neutralizing antibodies (NAb) in human serum, a sensitive virus neutralization assay was developed using a SeV vector encoding green fluorescent protein. Samples from 255 HIV-uninfected subjects from Africa, Europe, United States, and Japan, as well as from 12 confirmed hPIV-1-infected patients, were analyzed. SeV NAb titers did not vary significantly after serum was treated with receptor-destroying enzyme, indicating that non-specific hemagglutination inhibitors did not affect the assay sensitivity. A significant correlation was observed between hPIV-1 ELISA and SeV NAb titers. SeV NAb were detected in 92.5% subjects with a median titer of 60.6 and values ranging from 5.9- 11,324. The majority had titers < 1000 with 71.7% < 100 (< 5 considered negative). There was no significant difference in titer or prevalence by gender, age range or geographic origin. However, African males had a lower titer than non-Africans of either gender (p=0.007). Overall, the prevalence of SeV NAb is high and likely due to neutralization by cross-reactive hPIV-1 antibodies. Clinical trials will be needed to assess the influence of pre-existing SeV NAb on HIV-specific immune responses elicited by a SeV vaccine vector expressing HIV. A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and antigenically related to human parainfluenza virus type 1 (hPIV-1), it is important to determine whether pre-existing hPIV-1 antibodies will affect immune responses elicited by a SeV vector-based vaccine. To quantify SeV neutralizing antibodies (NAb) in human serum, a sensitive virus neutralization assay was developed using a SeV vector encoding green fluorescent protein. Samples from 255 HIV-uninfected subjects from Africa, Europe, United States, and Japan, as well as from 12 confirmed hPIV-1-infected patients, were analyzed. SeV NAb titers did not vary significantly after serum was treated with receptor-destroying enzyme, indicating that non-specific hemagglutination inhibitors did not affect the assay sensitivity. A significant correlation was observed between hPIV-1 ELISA and SeV NAb titers. SeV NAb were detected in 92.5% subjects with a median titer of 60.6 and values ranging from 5.9- 11,324. The majority had titers < 1000 with 71.7% < 100 (< 5 considered negative). There was no significant difference in titer or prevalence by gender, age range or geographic origin. However, African males had a lower titer than non-Africans of either gender (p=0.007). Overall, the prevalence of SeV NAb is high and likely due to neutralization by cross-reactive hPIV-1 antibodies. Clinical trials will be needed to assess the influence of pre-existing SeV NAb on HIV-specific immune responses elicited by a SeV vaccine vector expressing HIV.A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and antigenically related to human parainfluenza virus type 1 (hPIV-1), it is important to determine whether pre-existing hPIV-1 antibodies will affect immune responses elicited by a SeV vector-based vaccine. To quantify SeV neutralizing antibodies (NAb) in human serum, a sensitive virus neutralization assay was developed using a SeV vector encoding green fluorescent protein. Samples from 255 HIV-uninfected subjects from Africa, Europe, United States, and Japan, as well as from 12 confirmed hPIV-1-infected patients, were analyzed. SeV NAb titers did not vary significantly after serum was treated with receptor-destroying enzyme, indicating that non-specific hemagglutination inhibitors did not affect the assay sensitivity. A significant correlation was observed between hPIV-1 ELISA and SeV NAb titers. SeV NAb were detected in 92.5% subjects with a median titer of 60.6 and values ranging from 5.9- 11,324. The majority had titers < 1000 with 71.7% < 100 (< 5 considered negative). There was no significant difference in titer or prevalence by gender, age range or geographic origin. However, African males had a lower titer than non-Africans of either gender (p=0.007). Overall, the prevalence of SeV NAb is high and likely due to neutralization by cross-reactive hPIV-1 antibodies. Clinical trials will be needed to assess the influence of pre-existing SeV NAb on HIV-specific immune responses elicited by a SeV vaccine vector expressing HIV. |
Author | Hara, Hiroto Parks, Christopher L. Hasegawa, Mamoru Mwananyanda, Lawrence Nagai, Yoshiyuki Ackland, James Anzala, Omu Shu, Tsugumine Karita, Etienne Inoue, Makoto Falsey, Ann R. Kamali, Anatoli Sayeed, Eddy Krebs, Marietta Vasan, Sandhya Lombardo, Angela Price, Matthew A. Cormier, Emmanuel Hironaka, Takashi Sanders, Eduard J. Iida, Akihiro Excler, Jean-Louis |
AuthorAffiliation | Centre for Geographic Medicine Research-Coast; Kenya Medical Research Institute (KeMRI); Kilifi, Kenya Aaron Diamond AIDs Research Center; New York, NY USA Rwanda-Zambia HIV Research Group; Lusaka, Zambia International AIDS Vaccine Initiative; New York, NY USA DNAVEC Corporation; Tsukuba, Ibaraki Japan Rochester General Hospital; Rochester, NY USA Centre for Clinical Vaccinology and Tropical Medicine; University of Oxford; Headington, UK RIKEN Center of Research Network for Infectious Diseases Rwanda-Zambia HIV Research Group; Kigali, Rwanda IAVI Human Immunology Laboratory; Imperial College; London, UK Kenya AIDS Vaccine Initiative; University of Nairobi; Nairobi, Kenya Medical Research Council; Uganda Virus Research Institute; Uganda Research Unit on AIDS; Entebbe, Uganda |
AuthorAffiliation_xml | – name: Medical Research Council; Uganda Virus Research Institute; Uganda Research Unit on AIDS; Entebbe, Uganda – name: IAVI Human Immunology Laboratory; Imperial College; London, UK – name: Rwanda-Zambia HIV Research Group; Lusaka, Zambia – name: International AIDS Vaccine Initiative; New York, NY USA – name: Kenya AIDS Vaccine Initiative; University of Nairobi; Nairobi, Kenya – name: Centre for Geographic Medicine Research-Coast; Kenya Medical Research Institute (KeMRI); Kilifi, Kenya – name: Centre for Clinical Vaccinology and Tropical Medicine; University of Oxford; Headington, UK – name: Rwanda-Zambia HIV Research Group; Kigali, Rwanda – name: Aaron Diamond AIDs Research Center; New York, NY USA – name: Rochester General Hospital; Rochester, NY USA – name: RIKEN Center of Research Network for Infectious Diseases – name: DNAVEC Corporation; Tsukuba, Ibaraki Japan |
Author_xml | – sequence: 1 givenname: Hiroto surname: Hara fullname: Hara, Hiroto – sequence: 2 givenname: Takashi surname: Hironaka fullname: Hironaka, Takashi – sequence: 3 givenname: Makoto surname: Inoue fullname: Inoue, Makoto – sequence: 4 givenname: Akihiro surname: Iida fullname: Iida, Akihiro – sequence: 5 givenname: Tsugumine surname: Shu fullname: Shu, Tsugumine – sequence: 6 givenname: Mamoru surname: Hasegawa fullname: Hasegawa, Mamoru – sequence: 7 givenname: Yoshiyuki surname: Nagai fullname: Nagai, Yoshiyuki – sequence: 8 givenname: Ann R. surname: Falsey fullname: Falsey, Ann R. – sequence: 9 givenname: Anatoli surname: Kamali fullname: Kamali, Anatoli – sequence: 10 givenname: Omu surname: Anzala fullname: Anzala, Omu – sequence: 11 givenname: Eduard J. surname: Sanders fullname: Sanders, Eduard J. – sequence: 12 givenname: Etienne surname: Karita fullname: Karita, Etienne – sequence: 13 givenname: Lawrence surname: Mwananyanda fullname: Mwananyanda, Lawrence – sequence: 14 givenname: Sandhya surname: Vasan fullname: Vasan, Sandhya – sequence: 15 givenname: Angela surname: Lombardo fullname: Lombardo, Angela – sequence: 16 givenname: Christopher L. surname: Parks fullname: Parks, Christopher L. – sequence: 17 givenname: Eddy surname: Sayeed fullname: Sayeed, Eddy – sequence: 18 givenname: Marietta surname: Krebs fullname: Krebs, Marietta – sequence: 19 givenname: Emmanuel surname: Cormier fullname: Cormier, Emmanuel – sequence: 20 givenname: James surname: Ackland fullname: Ackland, James – sequence: 21 givenname: Matthew A. surname: Price fullname: Price, Matthew A. – sequence: 22 givenname: Jean-Louis surname: Excler fullname: Excler, Jean-Louis email: jlexcler@iavi.org |
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Snippet | A Sendai virus (SeV) vector is being developed for delivery of an HIV immunogen. SeV is not known to cause disease in humans. Because it is genetically and... |
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SubjectTerms | Adolescent Adult Africa AIDS Vaccines - immunology Antibodies, Neutralizing - blood Antibodies, Viral - blood Binding Biology Bioscience Calcium Cancer Cell Cross Reactions Cycle Europe Female Genetic Vectors Humans Japan Landes Male Middle Aged Organogenesis Parainfluenza Virus 1, Human - immunology Proteins Sendai virus - genetics Sendai virus - immunology United States |
Title | Prevalence of specific neutralizing antibodies against Sendai virus in populations from different geographic areas: Implications for AIDS vaccine development using Sendai virus vectors |
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