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dc.contributor.authorMadsen, D.
dc.contributor.authorCantwell, E. R.
dc.contributor.authorO'Brien, T.
dc.contributor.authorJohnson, P. A.
dc.contributor.authorMahon, B. P.
dc.date.accessioned2018-09-20T16:15:27Z
dc.date.available2018-09-20T16:15:27Z
dc.date.issued2009-07-29
dc.identifier.citationMadsen, D. Cantwell, E. R.; O'Brien, T.; Johnson, P. A.; Mahon, B. P. (2009). Adeno-associated virus serotype 2 induces cell-mediated immune responses directed against multiple epitopes of the capsid protein vp1. Journal of General Virology 90 , 2622-2633
dc.identifier.issn0022-1317,1465-2099
dc.identifier.urihttp://hdl.handle.net/10379/12571
dc.description.abstractAdeno-associated virus serotype 2 (AAV-2) has been developed as a gene therapy vector. Antibody and cell-mediated immune responses to AAV-2 or AAV-2-transfected cells may confound the therapeutic use of such vectors in clinical practice. In one of the most detailed examinations of AAV-2 immunity in humans to date, cell-mediated and humoral immune responses to AAV-2 were characterized from a panel of healthy blood donors. The extent of AAV-2-specific antibody in humans was determined by examination of circulating AAV-2-specific total IgG levels in plasma from 45 normal donors. Forty-one donors were seropositive and responses were dominated by IgG1 and IgG2 subclasses. Conversely, AAV-2-specific IgG3 levels were consistently low in all donors. Cell-mediated immune recall responses were detectable in nearly half the population studied. In vitro restimulation with AAV-2 of peripheral blood mononuclear cell cultures from 16 donors elicited gamma interferon (IFN-gamma) (ten donors), interleukin-10 (IL-10) (eight donors) and interleukin-13 (IL-13) (four donors) responses. Using a series of overlapping peptides derived from the sequence of the VP1 viral capsid protein, a total of 59 candidate T-cell epitopes were identified. Human leukocyte antigen characterization of donors revealed that the population studied included diverse haplotypes, but that at least 17 epitopes were recognized by multiple donors and could be regarded as immunodominant. These data indicate that robust immunological memory to AAV-2 is established. The diversity of sequences recognized suggests that attempts to modify the AAV-2 capsid, as a strategy to avoid confounding immunity, will not be feasible.
dc.publisherMicrobiology Society
dc.relation.ispartofJournal of General Virology
dc.subjectphase-i trial
dc.subjectgene-therapy
dc.subjectcystic-fibrosis
dc.subjectintravenous-injection
dc.subjectvaccinated children
dc.subjectsubclass profile
dc.subjectparvovirus b19
dc.subjectviral vectors
dc.subjecthemophilia-b
dc.subjectaav vectors
dc.titleAdeno-associated virus serotype 2 induces cell-mediated immune responses directed against multiple epitopes of the capsid protein vp1
dc.typeArticle
dc.identifier.doi10.1099/vir.0.014175-0
dc.local.publishedsourcehttp://jgv.microbiologyresearch.org/deliver/fulltext/jgv/90/11/2622.pdf?itemId=/content/journal/jgv/10.1099/vir.0.014175-0&mimeType=pdf&isFastTrackArticle=
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