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Citation Information: J Clin Invest. 1978;61(1):72-78. https://doi.org/10.1172/JCI108927.
Abstract
To examine the electrostatic effects of fixed negative charges on the glomerular capillary wall, polydisperse [3H]DEAE dextran, a polycationic form of dextran, was infused into 10 Munich-Wistar rats. Fractional clearances of DEAE ranging in radius from 18 to 44Å were determined in these rats, together with direct measurements of the forces and flows governing the glomerular filtration rate of water. These results were compared with data previously obtained in Munich-Wistar rats receiving tritiated neutral dextran (D) and polyanionic dextran sulfate (DS). Measured values for the determinants of the glomerular filtration rate of water in rats given DEAE were found to be essentially identical to those in rats given either D or DS. In addition, DEAE was shown to be neither secreted nor reabsorbed. Fractional clearances of polycationic DEAE were increased relative to both D and DS, the increase relative to D being significant for effective molecular radii ranging from 24 to 44Å.
Authors
Michael P. Bohrer, Christine Baylis, H. David Humes, Richard J. Glassock, Channing R. Robertson, Barry M. Brenner
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