Twelve-months treatment with dapagliflozin improves endothelial glycocalyx and cardiovascular function in patients with type 1 diabetes mellitus

Abstract Background Individuals diagnosed with type 1 diabetes mellitus (T1DM) exhibit indications of vascular and endothelial dysfunction earlier in comparison to healthy individuals. Evidence shows that SGLT-2 inhibitors (SGLT-2i) have a beneficial impact on cardiovascular health in individuals with type 2 diabetes mellitus (T2DM). We investigated the effects of dapagliflozin on endothelial and cardiovascular function in patients with T1DM. Methods We recruited in total 40 patients with T1DM and pour glycemic control who were treated with insulin and received dapagliflozin (n=20) or intensification of insulin treatment (n=20) (control group). We measured at baseline and at twelve months post-treatment the: a) Carotid-femoral pulse wave velocity (PWV-Complior; ALAM Medical) b) Central systolic blood pressure (cSBP) c) Perfused boundary region (PBR) of the sublingual arterial microvessels (marker of endothelial glycocalyx thickness) and d) Left ventricular global longitudinal strain (GLS) using speckle-tracking echocardiography. Results At baseline, patients among the two groups had similar age, sex, HbA1c and markers of endothelial and cardiovascular function (p>0.05). After 12 months of treatment, patients who received dapagliflozin displayed an improvement in PBR5–25 (−16%, p<0.05), in PWV (−9.3%, p<0.05), in cSBP (−6%, p<0.05) and in GLS (+4%, P<0.05) compared to baseline. However, no statistically significant changes in PBR5–25, in PWV, in cSBP and in GLS were observed after intensification of insulin treatment (PBR5–25: +0.4%, PWV: -1%, cSBP: −2%, GLS: −1% at 4 months, P>0.05), despite a similar HbA1c reduction (Table 1). Changes of PBR after one year treatment with dapagliflozin correlated with a concomitant reduction of PWV and cSBP (P<0.05). Conclusions Twelve months treatment with dapagliflozin improves endothelial glycocalyx and cardiovascular function in patients with T1DM, independently of glycemic control.