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  • Title: Simple sugars with affinity for the macrophage asialoglycoprotein receptor are adjuvants for the humoral immune response to neuraminidase-treated sheep erythrocytes.
    Author: Klerx JP, Molendijk AJ, Van Dijk H, Vloet KP, Willers JM.
    Journal: J Immunol; 1986 Jan; 136(1):73-5. PubMed ID: 3940271.
    Abstract:
    The influence of monosaccharides on the humoral immune response of mice to normal and neuraminidase-treated sheep red blood cells (SRBC) was investigated. In these studies, both the sugars and antigen were administered i.p. D-Galactose displayed adjuvant activity for neuraminidase-treated but not for normal SRBC. This activity was optimal at an antigen dose of 3 X 10(6) cells. Other monosaccharides with an axial hydroxyl group at position 4 and D-mannose-6-phosphate behaved like D-galactose, whereas structurally unrelated sugars did not. The adjuvant activity of the saccharides corresponded to the affinity of the substances for the asialo-glycoprotein receptor. The adjuvant effects were also expressed in cobra venom factor-treated and C5-deficient mice. This suggests that blockade of the asialo-receptor rather than complement is involved in this form of immunoadjuvant activity. The findings are also in support of our hypothesis that obstruction of nonimmune antigen elimination, in this case at the level of macrophages, would be one of the mechanisms underlying immunologic adjuvant activity.
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