Lateral saphenous vein blood from conscious, non-fasted mice was collected following eight weeks of treatment. Plasma neprilysin activity was assessed by a fluorometric enzyme method, as previously described (11 (link)). Each plasma sample was assayed in both the absence and presence of a specific neprilysin inhibitor (DL-thiorphan, Sigma-Aldrich, St Louis, MO, USA) to differentiate neprilysin activity from non-specific endopeptidase activity.
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