title: Thymic function in NZB mice. II. Regulatory influence of a circulating thymic factor on antibody production against polyvinylpyrrolidone in NZB mice.
abstract: Administration of a circulating thymic factor isolated from normal pig blood prevented the development of the exaggerated production of anti-polyvinyl pyrrolidone (PVP) antibody in young NZB mice. However, treatment was ineffective if initiated after the 4th week of life at a time when endogenous serum thymic factor (TF) normally disappears in these mice. These data suggest that circulating TF is necessary for the survival of short-lived suppressor T cells normally implicated in the regulation of the production of antibodies against PVP, a thymus-independent antigen. In older NZB mice, TF treatment increased paradoxically anti-PVP antibody production, which suggests that "amplifier" T cell activity could also be under TF influence.
mesh_terms: D000367:Age Factors; D000818:Animals; D000917:Antibody Formation; D005260:Female; D006649:Histocompatibility Antigens; D007165:Immunosuppression Therapy; D008297:Male; D051379:Mice; D008814:Mice, Inbred NZB / Q000276:immunology*; D008815:Mice, Inbred Strains; D011205:Povidone; D012737:Sex Factors; D013601:T-Lymphocytes / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology*
chemical_list: D006649:Histocompatibility Antigens; D011205:Povidone