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Luabeya, Angelique Kany Kany; Kagina, Benjamin M.N; Tameris, Michele D; Geldenhuys, Hennie; Hoff, Soren T; Shi, Zhongkai; Kromann, Ingrid; Hatherill, Mark; Mahomed, Hassan; Hanekom, Willem A; Andersen, Peter; Scriba, Thomas J; Schoeman, Elisma; Krohn, Colleen; Day, Cheryl L; Africa, Hadn; Makhethe, Lebohang; Smit, Erica; Brown, Yolande; Suliman, Sara; Hughes, E. Jane; Bang, Peter; Snowden, Margaret A; McClain, Bruce; Hussey, Gregory D
Vaccine, 08/2015, Letnik: 33, Številka: 33Journal Article
Abstract Background H56:IC31 is a candidate tuberculosis vaccine comprising a fusion protein of Ag85B, ESAT-6 and Rv2660c, formulated in IC31 adjuvant. This first-in-human, open label phase I trial assessed the safety and immunogenicity of H56:IC31 in healthy adults without or with Mycobacterium tuberculosis ( M.tb ) infection. Methods Low dose (15 μg H56 protein in 500 nmol IC31) or high dose (50 μg H56, 500 nmol IC31) vaccine was administered intramuscularly thrice, at 56-day intervals. Antigen-specific T cell responses were measured by intracellular cytokine staining and antibody responses by ELISA. Results One hundred and twenty-six subjects were screened and 25 enrolled and vaccinated. No serious adverse events were reported. Nine subjects (36%) presented with transient cardiovascular adverse events. The H56:IC31 vaccine induced antigen-specific IgG responses and Th1 cytokine-expressing CD4+ T cells. M.tb -infected vaccinees had higher frequencies of H56-induced CD4+ T cells than uninfected vaccinees. Low dose vaccination induced more polyfunctional (IFN-γ+ TNF-α+ IL-2+ ) and higher frequencies of H56-specific CD4+ T cells compared with high dose vaccination. A striking increase in IFN-γ-only-expressing CD4+ T cells, displaying a CD45RA− CCR7− effector memory phenotype, emerged after the second high-dose vaccination in M.tb -infected vaccinees. TNF-α+ IL-2+ H56-specific memory CD4+ T cells were detected mostly after low-dose H56 vaccination in M.tb -infected vaccinees, and predominantly expressed a CD45RA− CCR7+ central memory phenotype. Our results support further clinical testing of H56:IC31.
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Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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