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Renal handling of bilirubin photoderivatives

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Summary

The renal handling of unconjugated bilirubin in the dark and during light exposure was analyzed using an isolated rat kidney preparation. The parameters tested were pigment disappearance from the perfusion medium, pigment uptake by tissue, and its renal clearance. The results indicated that despite the fact that pigment disappearance from the medium was similar for both forms of pigment, the extraction ratio was higher for irradiated pigment than for pigment in the dark. When renal clearance of pigment was plotted vs pigment uptake of tissue, the results indicated that irradiated pigment may be more efficiently removed by the kidney. In addition, data on the rate of secretion of p-aminohippurate suggested that both pigment forms shared a common site for secretion.

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13 August 1986

Acknowledgments. This work was supported by grants from Consejo Nacional de Investigaciones Cientificas y Técnicas (CONICET), República Argentina. The valuable technical assistance of J. Pellegrino and E. Luque is gratefully acknowledged. We are also indebted to Dr S. Bravlavsky (Max-Planck Institut für Strahlenchemie, D-4330 Mülheim a. d. Ruhr, FRG) for stimulating discussion, and to Mr B. Leguizamón for secretarial assistance.

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Elías, M.M., Comin, E.J., Ochoa, J.E. et al. Renal handling of bilirubin photoderivatives. Experientia 43, 875–878 (1987). https://doi.org/10.1007/BF01951646

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