Aim: The present study assesses the relation between uric acid and cardiovascular autonomic function (CAF), blood pressure (BR) and visceral obesity at early stages of glucose intolerance.
Material and Methods: A total of 100 subjects - 50 males, mean age 47.4±14.2years, mean BMI 32.2±7.5kg/m2, divided into 3 groups according to glucose tolerance: 30 subjects with normal glucose tolerance (NGT), 37 with prediabetes and 33 with type 2 diabetes (T2D) with duration ≤5 years were included. Glucose tolerance was assessed by OGTT according to WHO 2006 criteria. Anthropometric indices, BP, HbA1c and plasma glucose were measured. Body fat distribution was estimated by a bioimpedance method (InBody 720, BioSpace). CAF was assessed by ANX-3.0 using frequency-domain analysis during standard clinical tests.
Results: Uric acid levels were higher in prediabetes and T2D (p<0.0001 and p=0.004, respectively) as compared to NGT. There was a decreased parasympathetic tone at rest (p=0.026 and p=0.001, respectively), deep breathing (p=0.025 and p=0.003, respectively), Valsalva maneuver (p=0.023 and p=0.003, respectively) and standing (p=0.012 and p=0.002, respectively) test in T2D in comparison to prediabetes and NGT. Sympathetic tone was diminished at rest (p=0.004), deep breathing (p=0.040) and standing (p=0.016) test in T2D as compared to NGT. Uric acid positively correlated with waist circumference (r=44, p<0.0001), visceral fat area (r=24, p=0.022), diastolic BP (r=0.023) and HbA1c (r=22, p=0.030); and negatively with sympathetic activity at rest (r=-23, p=0.024), deep breathing (r=-26, p=0.010) and standing (r=-21, 0=0.039) test and with parasympathetic activity during deep breathing test (r=-21, p=0.033).
Conclusions: It seems to be an increase in uric acid levels and a decline in CAF in prediabetes and T2D with short duration. Uric acid is probably associated with CAF, visceral obesity and BP at early stages of dysglycaemia.
R. Dimova: Consultant; Self; Amgen, Boehringer Ingelheim International GmbH. Speaker’s Bureau; Self; Sanofi, Wörwag Pharma. N. Chakarova: None. G. Grozeva-Damyanova: None. T. Tankova: Board Member; Self; Amgen, Boehringer Ingelheim International GmbH, Eli Lilly and Company, Merck Sharp & Dohme Corp., Mundipharma International, Novo Nordisk A/S, Sanofi. Speaker’s Bureau; Self; AstraZeneca, Boehringer Ingelheim International GmbH, Sanofi, Servier.