Haemoglobin age levels in type 1 diabetes patients are increased and correlate with vascular inflammation (#277)
Hyperglycaemia, inflammation and Advanced Glycation End-Products (AGEs) may
promote diabetes complications. Given their lifespan and accessibility Red
Blood Cell (RBC) related AGEs are of interest. We quantified haemoglobin (Hb)
AGEs and globin autofluoresence (AF) in a cross-sectional study of 147 (18–73
yr old Type 1 diabetic (T1D) patients (including 54 with and 93 without complications)
and 60 healthy non-diabetic controls. T1D duration was mean±SD 21±13 years.
HbA1c in T1D and controls was 7.9±1.4% and 5.0±0.3% respectively
(p<0.00001). HbAGEs were increased in T1D vs. controls: 0.19±0.09 vs.
0.14±0.03 AU, p=0.0003; as was globin AF 2.37±0.16 vs. 2.19±0.09, p<0.00001.
There were no significant differences in either AGE related to T1D complication
status. HbAGEs and globin AF correlated in T1D (r=0.41; p<0.00001) but not
in controls. Only globin AF correlated with vascular health (mean BP r=0.39;
p=0.002 and Small Artery Elasticity r=-0.30; p=0.02 in controls, but not in T1D
patients. In T1D globin AF correlated with vascular inflammation: se-Selectin
r=0.26; p=0.002; sICAM r=0.23; p=0.007 and sVCAM-1 r=0.19; p=0.03. Neither AGE
level correlated with age, HbA1c or renal dysfunction in T1D. Relative to
controls, T1D is associated with significantly higher levels in two Hb related
AGEs, which correlate with measures of vascular inflammation. These simple,
low-cost assays may facilitate monitoring of anti-AGE therapies and vascular
inflammation.