The insolubility of antigen-antibody aggregates formed at most proportions of reactants has prevented physicochemical study of these systems of interacting proteins under conditions in which they remain associated. Only when the antigen is present in great excess and soluble complexes are formed have the products been examined by ultracentrifugation (14)) moving boundary electrophoresis (l-3), ...

In the presence of the soluble polypeptide antigens ovalbumin and keyhole limpet hemocyanin, purified mouse spleen dendritic cells induce the secretion of IL-2 by antigen-specific T cell hybridomas. This response is H-2 restricted and can be specifically inhibited by monoclonal anti-I-A. These data indicate that dendritic cells can present soluble antigen to H-2-compatible T cells.

In a previous paper (1) we described the appearance of a soluble circulating antibody-antigen complex in rabbits after single intravenous injections of large doses of bovine plasma albumin or bovine plasma gamma globulin, or after intramuscular injections of these agents with Freund's adjuvants. The soluble complex was demonstrated in the serum by brief exposure to alkali in the cold followed b...

Recent evidence revealed that presentation of soluble antigens is governed by the endocytosis mechanisms that determine the intracellular routing of the endocytosed antigens. Soluble antigens intended for classical exogenous MHC-II-restricted presentation are internalized into lysosomes. Soluble antigens destined for crosspresentation are taken up by distinct endocytosis mechanisms and are conv...

background: cationic immune stimulating complexes (pluscoms) are particulate antigen delivery systems. pluscoms consist of cationic immunostimulatory complexes (iscoms) derivatives and are able to elicit in vivo t cell responses against an antigen. objective: to evaluate the effects of pluscoms containing leishmaniamajor antigens (sla) on the type of immune response generated in the murine mode...

Fresh human T lymphocytes respond proliferatively to soluble antigens, such as PPD, provided the cell donor has been immunized to those antigens in vivo. This proliferative response requires the addition of antigen-presenting cells bearing autologous HLA-D antigens. This report demonstrates that the proliferative response to PPD activates a collaborative response that aids in the activation of ...

in this study which has been carried out from 1996 until 1997 soluble latex agglutination antigen was prepared from L, donovani,sudan(s-1) by culturing in special media,harvesting,and later solubilizing by freezing and thawing.the antigen were futher prepared by high speed centrifugation.after measurement of the protein (lowry method) concentration of the antigen was set at 2.2 mg/ml,the antige...