Intravenous injection of Type 1 streptococcal M protein into mice and rats produced lesions confined to renal glomeruli. Thrombi of eosinophilic amorphous material, seen to occlude glomerular capillaries, were shown to contain M protein and fibrinogen. Gradual regression of the morphological lesions was observed during the 3 weeks following injection. Initial abnormal proteinuria and azotemia returned to control levels by the end of the 1st week; a second rise in urinary protein excretion and urea retention was demonstrated in some rats coincident with appearance of anti-M antibodies. The mechanism of renal localization of streptococcal M protein by means of a complex with fibrinogen was suggested, which may comprise an initial phase in the pathogenesis of acute poststreptococcal glomerulonephritis.
FIBRINOGEN PRECIPITATION BY STREPTOCOCCAL M PROTEIN : II. RENAL LESIONS INDUCED BY INTRAVENOUS INJECTION OF M PROTEIN INTO MICE AND RATS
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Fred S. Kantor; FIBRINOGEN PRECIPITATION BY STREPTOCOCCAL M PROTEIN : II. RENAL LESIONS INDUCED BY INTRAVENOUS INJECTION OF M PROTEIN INTO MICE AND RATS . J Exp Med 1 May 1965; 121 (5): 861–872. doi: https://doi.org/10.1084/jem.121.5.861
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