The cytotoxic activity of leukocytes from humans and rats with pyelonephritis were examined in an antibody-dependent cell-mediated cytotoxicity assay (ADCC) with CrCl3-treated erythrocytes coated with Tamm-Horsfall (TH) as target cells. The specificity of the ADCC was confirmed by absorption with TH urinary glycoprotein and inhibition of the ADCC activity seen with polyclonal rabbit anti-TH antisera by monoclonal mouse antibodies. The ADCC activity detected in children with acute pyelonephritis was low in the initial phase of the disease, but increased significantly 9 days after the start of antibacterial treatment. In rats with experimental pyelonephritis, ADCC activity decreased significantly with increased duration of infection. Depletion of cells adhering to carbonyl iron led to higher ADCC activity. During the course of the infection the difference in ADCC activity between effector cell preparations depleted using carbonyl iron and those not depleted decreased. The decreased ADCC activity demonstrated during acute pyelonephritis may point to mechanisms operating to diminish the risk of tissue damage.

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© 1988 S. Karger AG, Basel
1988
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