Distinct Neopterin Excretion Patterns after Vaccination

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Abstract
Summary To compare the involvement of cellular immunity in response to vaccination we have investigated urinary neopterin levels in daily follow-ups of children after vaccination with live measles/mumps vaccine and of adults after boosting with the soluble antigen tetanus toxoid. Neopterin levels distinctly peaked 8 - 11 days after vaccination with measles/mumps vaccine. In contrast, after boosting with soluble antigen tetanus toxoid neopterin levels remained unaffected. Large amounts of neopterin are produced by human monocytes/ macro phages on stimulation with gamma interferon. In patients neopterin concentrations reflect activation of cell mediated immunity. The data imply that distinct pathways of T cell activation are triggered in humans after immunization with live vaccine and with soluble antigen .

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