OBJECTIVE: To characterize functional properties of HIV-specific IgA in samples representing both systemic and mucosal compartments of HIV-1 highly exposed persistently seronegative (HEPS) individuals. METHODS: IgA was purified from plasma and mucosal samples from HEPS individuals and tested for the ability to neutralize infection of peripheral blood mononuclear cells (PBMC) by a non-syncytium inducing HIV-1 (clade B) primary isolate. None of these individuals had measurable HIV-1-specific IgG. RESULTS: HIV-1-specific neutralizing activity of the purified IgA from plasma (n = 15), saliva (n = 15) and cervicovaginal fluid (CVF) (n = 14) were found in the majority of samples (73, 73 and 79%, respectively). In contrast, plasma, saliva and CVF samples of low-risk, uninfected HIV-seronegative individuals lacked neutralizing IgA, with the exception of two out of 34 (6%) saliva samples. CONCLUSION: Mucosal and plasma IgA from HEPS individuals can neutralize HIV-1 infection.
OBJECTIVE: To characterize functional properties of HIV-specific IgA in samples representing both systemic and mucosal compartments of HIV-1 highly exposed persistently seronegative (HEPS) individuals. METHODS:IgA was purified from plasma and mucosal samples from HEPS individuals and tested for the ability to neutralize infection of peripheral blood mononuclear cells (PBMC) by a non-syncytium inducing HIV-1 (clade B) primary isolate. None of these individuals had measurable HIV-1-specific IgG. RESULTS:HIV-1-specific neutralizing activity of the purified IgA from plasma (n = 15), saliva (n = 15) and cervicovaginal fluid (CVF) (n = 14) were found in the majority of samples (73, 73 and 79%, respectively). In contrast, plasma, saliva and CVF samples of low-risk, uninfected HIV-seronegative individuals lacked neutralizing IgA, with the exception of two out of 34 (6%) saliva samples. CONCLUSION: Mucosal and plasma IgA from HEPS individuals can neutralize HIV-1 infection.
Authors: Luigi Buonaguro; Maria Tagliamonte; Maria Luisa Visciano; Hanne Andersen; Mark Lewis; Ranajit Pal; Maria Lina Tornesello; Ulf Schroeder; Jorma Hinkula; Britta Wahren; Franco M Buonaguro Journal: Clin Vaccine Immunol Date: 2012-03-29
Authors: Nobuyuki Matoba; Tagan A Griffin; Michele Mittman; Jeffrey D Doran; Annette Alfsen; David C Montefiori; Carl V Hanson; Morgane Bomsel; Tsafrir S Mor Journal: Curr HIV Res Date: 2008-05 Impact factor: 1.581