Abstract
In the present study we have determined if renal damage occurs with adjuvant arthritis (AA). As a sensitive indicator of renal injury in tubular cells, urinary N-acetyl-beta-D-glucosaminidase (NAG) was measured at predetermined times after arthritis induction. Urinary protein, sodium and potassium excretion were also evaluated. NAG levels in arthritic animals were higher than those in healthy ones from day 12 after induction and the levels remained high during the study period. A significant positive correlation was noted between urinary NAG excretion and disease severity reflected by hind paw edema. Protein excretion also increased in arthritic animals but there was no correlation between urinary protein, NAG levels, and degree of inflammation. Changes in urine sodium and potassium levels did not reach statistical significance. Thus, we can conclude that some renal damage occurred in this experimental model of chronic inflammation.
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