Association Between Glycemic Control and Morning Blood Pressure Surge With Vascular Endothelial Dysfunction in Type 2 Diabetic Patients

作者：Yoda Koichiro; Inaba Masaaki^*; Hamamoto Kae; Yoda Maki; Tsuda Akihiro; Mori Katsuhito; Yamada Shinsuke; Emoto Masanori; Koyama Hidenori; Imanishi Yasuo

来源：Diabetes Care, 2014, 37(3): 644-650.

DOI：10.2337/dc13-1102

OBJECTIVEMorning blood pressure surge (MBPS) is an independent predictor of cardiovascular events. However, little is known about the association between glycemic control and MBPS, and its effect on vascular injury in patients with type 2 diabetes mellitus (T2DM). The current study examined the association between glycemic control and MBPS, and the involvement of MBPS in the development of vascular dysfunction in T2DM patients.RESEARCH DESIGN AND METHODSWe examined MBPS in T2DM patients (25 male patients/25 female patients; mean age, 60.1 13.2 years; n = 50) using 24-h ambulatory blood pressure monitoring, and assessed vascular function by brachial artery flow-mediated dilation (FMD) and nitroglycerin-mediated dilation (NMD).RESULTSHbA(1c) ( = 0.373, P = 0.009) and triglyceride (TG) ( = 0.375, P = 0.009) levels correlated significantly and positively with MBPS. In multiple regression analysis, including TG and HbA(1c) levels in addition to age and 24-h systolic blood pressure (SBP) as independent variables, HbA(1c) ( = 0.328, P = 0.016) and TG ( = 0.358, P = 0.014) were associated significantly in a positive manner with MBPS. In a noninsulin user, when homeostasis model assessment ratio (HOMA-R) was included in place of TG, HOMA-R emerged as a significant factor. MBPS ( = -0.289, P = 0.043) and HbA(1c) ( = -0.301, P = 0.035) correlated significantly and negatively with FMD, whereas 24-h SBP correlated with both FMD ( = -0.359, P = 0.012) and NMD ( = -0.478, P = 0.004). In multiple regression analysis, including age, gender, 24-h SBP, MBPS, LDL cholesterol, and HbA(1c), MBPS ( = -0.284, P = 0.044) alone associated significantly in a negative manner with FMD, but not with NMD.CONCLUSIONSThe current study demonstrated that poor glycemic control and insulin resistance are independently associated with the occurrence of MBPS in T2DM patients, which might be significantly associated with endothelial dysfunction.

• 出版日期2014-3