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  • Title: Enhancement of carrier-specific helper T cell function by the synthetic adjuvant, N-acetyl muramyl-L-alanyl-D-isoglutamine (MDP).
    Author: Sugimoto M, Germain RN, Chedid L, Benacerraf B.
    Journal: J Immunol; 1978 Mar; 120(3):980-2. PubMed ID: 344799.
    Abstract:
    The adjuvant effect of a synthetic peptidoglycan, muramyl dipeptide (N-acetyl muramyl-L-alanyl-D-isoglutamine, MDP), was studied by using the anti-Tnp PFC and hemagglutinin responses of BALB/c mice to hapten-carrier conjugates. Administration of Tnp-OVA and MDP in saline to mice, followed 2 weeks later by a boost of Tnp-OVA in saline, led to significantly higher IgM and IgG anti-Tnp PFC and total anti-Tnp-hemagglutinin responses than those obtained in mice not treated with MDP in the initial immunization. A similar adjuvant effect by MDP on anti-hapten PFC responses was seen if mice were primed with KLH together with MDP and challenged with Tnp-KLH 2 weeks later. This apparent effect on carrier priming for helper function was confirmed and quantitated by double adoptive transfer experiments with graded numbers of spleen cells from KLH +/- MDP-primed mice and a fixed number of hapten-primed spleen cells from syngeneic Tnp-OVA immunized animals. These data suggest that at least one mode of action of the synthetic adjuvant MDP is via the enhanced stimulation of the helper T cell function.
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