Abstract
By immunization with rabbit immunoglobulins and the injection of a subnephritogenic dose of rabbit nephrotoxic serum (NTS), accelerated-type nephrotoxic serum nephritis (NTN) was induced in heterozygous (rnu/+) rats but not in athymic nude (rnu/rnu) rats. By transferring rat antibody against rabbit immunoglobulins, marked proteinuria was induced also in nude rats (202.0 +/- 98.4 mg/day on day 3) as in rnu/+ rats (122.6 +/- 35.3 mg/day on day 3). No marked differences in histological findings could be found between both groups. The most marked increase in the number of intraglomerular infiltrating cells was observed in heterozygous rats indicating that the presence of thymus-derived cells leads to the accumulation of more cells in glomeruli. We conclude that humoral immunity alone is enough to accelerate the pathogenic mechanism which induces glomerular injury with heavy proteinuria in this model.
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