Endothelial dysfunction (ED) is common in type 2 diabetes mellitus (T2DM) and can lead to microvascular and macrovascular complications. The aim of our study was to assess ED in patients with T2DM (n=21; 13 with diabetic neuropathy (DN), 8 without DN) and compare them with non-diabetic controls (n=10).
Methods: ED was assessed by skin microcirculation (SM) and biochemical markers (BM) of endothelial function. SM was measured on the dorsum of the foot by laser Doppler (LD) iontophoresis using the Perimed Laser Doppler Imager. Endothelial-mediated vasodilation (EMV) was measured by the iontophoresis of acetylcholine (Ach), while sodium nitroprusside (SNP) was used to study endothelium-independent vasodilation (EIV). Fasting blood samples were collected at baseline for markers of endothelial activation (ICAM, VCAM and inflammatory molecules like IL-6).
Results: Patients in the control group were younger and had lower BMI and HbA1c. There was no difference in skin microcirculation between groups, for both EMV and EIV. There was also no difference in biochemical markers of ED including ICAM, VCAM, however, there was a significant up-regulation of IL-6 in T2DM (P=0.006)
Conclusions: In this small study we found no difference in skin microcirculation and biochemical markers of ED. Of note, the inflammatory marker IL-6 was raised in diabetic patients and whether this influences the endothelial dysfunction observed in this patient group remains to be corroborated in larger studies.
19 May 2018 - 22 May 2018