title: Influence of dextran polymer particles (Sephadex G-200) on humoral immune responses.
abstract: Dextran polymer particles (Sephadex G-200) mixed with bovine serum albumin (BSA) or sheep red blood cells (SRBC) were injected intraperitoneally (i.p.) into mice and the number of antibody-forming cells in spleen and antibody titers in sera were determined. Antibody formation following the first and the booster immunization to BSA was enhanced to a similar degree by Sephadex G-200 and incomplete Freund's adjuvant. When SRBC were injected in a suboptimal dose of 5X10(6) cells, Sephadex G-200 enhanced the maximum of the primary immune response. In contrast, the polymer inhibited the primary and secondary immune response when 5X10(8) SRBC were given.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells / Q000276:immunology*; D002417:Cattle; D003911:Dextrans / Q000494:pharmacology*; D004912:Erythrocytes / Q000276:immunology; D005620:Freund's Adjuvant / Q000494:pharmacology; D007075:Immunoglobulin M; D051379:Mice; D012710:Serum Albumin, Bovine / Q000276:immunology; D012756:Sheep; D012995:Solubility
chemical_list: D003911:Dextrans; D007075:Immunoglobulin M; D012710:Serum Albumin, Bovine; D005620:Freund's Adjuvant; C025614:sephadex