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However, it remains unclear whether vaccine-elicited IgA responses are beneficial or detrimental for protection. In this study, we evaluated the kinetics, magnitude, breadth, and linear epitope specificities of vaccine-elicited IgG and IgA responses in serum and mucosal secretions following intramuscular immunization with adenovirus 26 (Ad26) prime, Env protein boost vaccination regimens. The systemic and mucosal antibody responses exhibited kinetics similar to those of the serum antibody responses but lower titers than the serum antibody responses. Moreover, the IgG and IgA responses were correlated, both in terms of the magnitude of the responses and in terms of the antibody specificities against linear human immunodeficiency virus type 1 (HIV-1) Env, Gag, and Pol epitopes. These data suggest that IgG and IgA responses are highly coordinated in both peripheral blood and mucosal compartments following Ad26\/Env vaccination in rhesus monkeys.<\/jats:p><jats:p><jats:bold>IMPORTANCE<\/jats:bold>Vaccine-elicited IgG responses are important for protection against simian-human immunodeficiency virus (SHIV) infection in nonhuman primates. However, much less is known about the role and function of IgA, despite it being the predominant antibody in mucosal sites. There is debate as to whether HIV-1-specific IgA responses are beneficial or detrimental, since serum anti-Env IgA titers were shown to be inversely correlated with protection in the RV144 clinical trial. We thus assessed vaccine-elicited IgG and IgA antibody responses in peripheral blood and mucosal secretions following vaccination with the Ad26\/Env vaccine.<\/jats:p>","DOI":"10.1128\/jvi.00537-18","type":"journal-article","created":{"date-parts":[[2018,5,18]],"date-time":"2018-05-18T09:36:01Z","timestamp":1526636161000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":9,"title":["Similar Epitope Specificities of IgG and IgA Antibodies Elicited by Ad26 Vector Prime, Env Protein Boost Immunizations in Rhesus Monkeys"],"prefix":"10.1128","volume":"92","author":[{"given":"Zi Han","family":"Kang","sequence":"first","affiliation":[{"name":"Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christine A.","family":"Bricault","sequence":"additional","affiliation":[{"name":"Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Erica N.","family":"Borducchi","sequence":"additional","affiliation":[{"name":"Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kathryn E.","family":"Stephenson","sequence":"additional","affiliation":[{"name":"Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael S.","family":"Seaman","sequence":"additional","affiliation":[{"name":"Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA"},{"name":"Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria","family":"Pau","sequence":"additional","affiliation":[{"name":"Janssen Infectious Diseases and Vaccines, Leiden, Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hanneke","family":"Schuitemaker","sequence":"additional","affiliation":[{"name":"Janssen Infectious Diseases and Vaccines, Leiden, Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Danielle","family":"van Manen","sequence":"additional","affiliation":[{"name":"Janssen Infectious Diseases and Vaccines, Leiden, Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Frank","family":"Wegmann","sequence":"additional","affiliation":[{"name":"Janssen Infectious Diseases and Vaccines, Leiden, Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dan H.","family":"Barouch","sequence":"additional","affiliation":[{"name":"Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA"},{"name":"Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/nri2302"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.06812-11"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0897.2005.00267.x"},{"key":"e_1_3_2_5_2","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1016\/B978-012491543-5\/50013-9","volume-title":"Mucosal immunoglobulins","author":"Mestecky J","year":"2005","unstructured":"Mestecky J, Moro I, Kerr MA, Woof JM. 2005. 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