Effect of glycaemic control on the diurnal blood pressure variation and endogenous secretory receptor for advanced glycation end product (esRAGE) levels in type 1 diabetes mellitus

The relationship between plasma endogenous secretory receptor for advanced glycation end product (esRAGE) level and diurnal variation of blood pressure in type 1 diabetic patients based on their glycemic status has not yet been studied. So, the aim of the present study was to see if a correlation exists between plasma esRAGE levels and dipper status in type 1 diabetic patients based on their glycaemic status. Type 1 diabetic patients were divided as good and poor glycaemic controlled groups based on their HbA_1c values. Blood glucose levels, insulin, insulin antibodies, homocysteine and esRAGE levels were determined. The hourly daytime and night-time blood pressure was monitored by using a non-invasive blood pressure (NIBP) apparatus. Of the 16 patients in the well-controlled group, most (14/16) were dippers (95 % confidence interval 1.5 to 20.7 vs. P = 0.006, Fisher’s exact test) when compared to those in the poorly controlled group (5/18). There was a significant correlation between plasma esRAGE levels and % decline in nocturnal blood pressure in both the good (r = 0.69, P = 0.003) and poorly (r = 0.79, P = 0.0002) controlled groups. Most of the poorly controlled patients showed abnormal circadian blood pressure pattern and low esRAGE level and hence were more prone to end organ damage.