Tyrosine phosphorylation in type-1 diabetes by immunogold detection: an in vitro human aortic endothelial cell (HAEC) study in the presence of diabetic low density lipoproteins (LDL).

Overview

An immunomorphometric study of tyrosine phosphorylation was performed by the immunogold technique on cultured human aortic endothelial cells (HAEC) with a view to demonstrating their impaired signal transduction status, induced in vitro by incubation with low-density lipoproteins from the plasma of Type-1 diabetic patients. The results seem to sustain the hypothesis that extranuclear bioenergetic derangement induced by low-density lipoproteins from Type-1 diabetic patients may be associated with an up-regulation of the nuclear energetic machinery aimed at maintaining intracellular metabolic equilibrium. Our data demonstrate that phosphorylated tyrosine is a useful marker to monitor this metabolic condition.