Isotope-dilution LC-MS/MS Analysis of the Elastin Crosslinkers Desmosine and Isodesmosine in Acute Cerebral Stroke Patients

Abstract

We chemically synthesized an isotopically labeled internal standard, isodesmosine-13C3,15N1, and established an isotope-dilution LC-MS/MS method. Plasma concentrations of desmosine and isodesmosine in acute cerebral stroke patients and healthy controls were determined. The desmosine concentration was markedly higher in plasma from acute stroke patients compared with healthy controls. Desmosines are novel biomarkers for evaluating the extent of vascular injury after acute cerebral stroke.