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. 1987 Apr;60(4):509–515.

Immunomodulation with liposomes: the immune response elicited by liposomes with entrapped dichloromethylene-diphosphonate and surface-associated antigen or hapten.

E Claassen, N Kors, N van Rooijen
PMCID: PMC1453280  PMID: 2953668

Abstract

Macrophages in the murine spleen were eliminated by the intravenous administration of dichloromethylene-diphosphonate (DMDP) encapsulated in liposomes. The immune response against an antigen (bovine serum albumin, BSA) or hapten (dinitrophenyl, DNP) associated with the surface of the DMDP liposomes was studied. Significant effects of macrophage elimination on the primary (IgM), but not on the secondary (IgG), anti-BSA response were found. Dramatic effects on the response against liposome-associated DNP were observed in macrophage-depleted mice. The number of anti-DNP antibody-forming cells in the spleen decreased from 300 to 28 per section, and anti-DNP serum titres dropped to 12% of their normal values. Since a similar phenomenon was observed for TNP-Ficoll, a thymus-independent type-2 antigen (and not for thymus-dependent or thymus-independent type-1 antigens), we suggest that this response should be classified as thymus-independent type-2 on grounds of its in vivo behaviour. We conclude that adjuvant activity (and memory formation) of liposomes with antigen exposed on their surface occurs irrespective of the presence or absence of splenic macrophages, and that DMDP liposomes could be useful in drug targeting with antigenic liposomes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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