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Search: WFRF:(Settergren M) > (2005-2009)

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  • Settergren, M, et al. (author)
  • Endothelin-A receptor blockade increases nutritive skin capillary circulation in patients with type 2 diabetes and microangiopathy
  • 2008
  • In: Journal of vascular research. - : S. Karger AG. - 1423-0135 .- 1018-1172. ; 45:4, s. 295-302
  • Journal article (peer-reviewed)abstract
    • <i>Aims:</i> Endothelin-1 levels are elevated in patients with type 2 diabetes mellitus and may contribute to impaired microvascular function. We investigated the effect of selective endothelin-A (ET<sub>A</sub>) receptor blockade (BQ123) on skin microcirculation in patients with type 2 diabetes and albuminuria. <i>Methods:</i> Ten type 2 diabetes patients and 8 non-diabetic controls were investigated. Nutritive skin capillary circulation, investigated by videophotometric capillaroscopy, and total skin microcirculation, assessed by laser Doppler fluxmetry (LDF), were studied during intra-arterial infusion of saline for 15 min, followed by BQ123 infusion for 60 min. <i>Results:</i> Following BQ123 infusion there was a significant increase in resting capillary blood cell velocity (CBV) in patients with type 2 diabetes from 0.24 (0.20–0.34) mm/s at baseline to 0.61 (0.46–0.88) mm/s at 60 min, but no significant change in the control subjects [0.55 (0.10–0.68) vs. 0.38 (0.13–0.88) mm/s; p < 0.005 for difference between groups]. Peak CBV following arterial occlusion and skin temperature increased significantly in the type 2 diabetes group but not in the control group during BQ123 infusion. There were no significant changes in LDF parameters during infusion of BQ123 in either group. <i>Conclusion:</i> ET<sub>A</sub> receptor blockade improves nutritive skin capillary circulation in patients with type 2 diabetes and microangiopathy.
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