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Abstract
A new method of high performance liquid chromatography (HPLC) which makes it possible to analyse 2,8-dihydroxyadenine (DOA) in plasma in concentrations exceeding 0.25 μmol/l is described. The method was used to study the renal elimination of DOA. For comparison, the renal handling of adenine was also investigated.
The results from an analysis of the experimental data support the assumption that more than one concentration-dependent mechanism exists in the renal tubuli for each of the two purines, adenine and DOA. In general the clearance values are higher for DOA than for adenine and indicate net secretion for both substances.