1971
DOI: 10.1002/eji.1830010604
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Stimulation of humoral antibody formation by polyanions. IV. The effects of dextran sulfate on the kinetics of secondary immune response in mice

Abstract: sulfate enhances secondary immune response as well as primary immune response in mice primed and challenged with suboptimal doses of sheep red blood cells. Enhancement of primary response by dextran sulfate did not diminish secondary responses towards suboptimal antigen dose. However, in mice primed and challenged with an optimal antigen dose and injected at the time of priming with dextran sulfate, immunological memory seems t o be increased. In primary as well as in secondary response the number of both 19 S… Show more

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Cited by 20 publications
(5 citation statements)
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“…Carbonyl iron [57], zymosan and other glucans (Hadden et al, in [73]), and possibly polyelectrolytes in general [63] appear to act by providing a phagocytic load and macrophage replication in response to this load. Polyanions such as dextran sulfate and polyacrylic acid are strong adjuvants which also appear to act directly on macrophages [43,44,45,46], enhancing not only primary and secondary antibody responses but also the delayed hypersensitivity response to antigen given at the same site. Here something more than simple phagocytosis must be at work, perhaps a form of membrane activation analogous to that produced by hydrophobic antigens mentioned earlier.…”
Section: Effects Onmacrophagesmentioning
confidence: 99%
“…Carbonyl iron [57], zymosan and other glucans (Hadden et al, in [73]), and possibly polyelectrolytes in general [63] appear to act by providing a phagocytic load and macrophage replication in response to this load. Polyanions such as dextran sulfate and polyacrylic acid are strong adjuvants which also appear to act directly on macrophages [43,44,45,46], enhancing not only primary and secondary antibody responses but also the delayed hypersensitivity response to antigen given at the same site. Here something more than simple phagocytosis must be at work, perhaps a form of membrane activation analogous to that produced by hydrophobic antigens mentioned earlier.…”
Section: Effects Onmacrophagesmentioning
confidence: 99%
“…Moreover, the effect of poly A:U on secondary response was restricted t o 19 S antibody formation, while their effect o n 7 S PFC was reported t o be of "questionable significance". As shown previously, the effects of poly A:U [ 5 ] and of polyanions [ 1-41 on the primary immune response depend o n the antigen dose injected. The adjuvant action of these substances was more pronounced in mice immunized with suboptimal than with optimal doses of antigen.…”
Section: Discussionmentioning
confidence: 87%
“…Braun et al [5] reported that poly A:U (a polyanion of phosphated polymer type) enhances secondary response less effectively than primary immune response t o SRBC in mice. Moreover, the effect of poly A:U on secondary response was restricted t o 19 S antibody formation, while their effect o n 7 S PFC was reported t o be of "questionable significance".…”
Section: Discussionmentioning
confidence: 99%
“…In vivo activation of B-cells in mice devoid of T-cells has also been observed [59,60]. Thus, the PAA polymers are capable of initiating an immune response in B-cells, without assistance of T-cells or APCs [60][61][62][63][64]. This ability of PAA to respond independently of T-cells has important implications for mucosal immune response as T-cell dependent IgA class switching and T-cell dependent antibody responses takes 5 to 7 days to develop [65].…”
Section: Polyacrylic Polymers As Mucosal Adjuvant and Immunomodulatormentioning
confidence: 85%