Renal sympathetic nervous activity plays a crucial role in the development and maintenance of hypertension (HTN). Renal denervation (RDN) is a minimally invasive catheter-based treatment using mainly radiofrequency or ultrasound energy to selectively disrupt the sympathetic renal nerves. RDN has experienced rises and falls during its development as a treatment option for HTN in humans. Latest well-designed sham-controlled randomised trials with improved methodology confirmed significant blood pressure (BP) reduction in both office and 24-hour ambulatory BP. Although the safety of RDN procedures seems favourable thus, the rate of BP response to the procedure is variable, with response rates reported in the range between 60% and 70%. It is of great importance to identify biomarkers able to reliably predict subjects who would benefit from this treatment, in order to achieve better therapeutic results. Proteomics is the study of the full complement of proteins produced or modified by a biological system (cell, tissue, organ, biological fluid, or organism). Proteomic analysis is used in different research settings to understand pathogenicity mechanisms and emerge biomarkers with predictive role in diagnosis and treatment of different diseases. The main purpose of this study is to investigate the potential predictive role of the urine proteomics in BP response of patients undergoing RDN. This hypothesis may lead to the emergence of biomarkers in urine of hypertensive patients, in order to optimally select those who will undergo RDN. This is a prospective observational study enrolling hypertensive patients, aged 18-80 years who will proceed in RDN as participants of randomized control trials. During baseline evaluation HTN diagnosis will be confirmed by office blood pressure measurement (OBPM) and ambulatory blood pressure measurement (ABPM), while urine sample will be collected before RDN for proteomic analysis. The participants will have a follow-up visit in 3 months since baseline procedure for office blood pressure (OBP) and ambulatory blood pressure (ABP) measurements. A cut off value of 5mmHg reduction in ABP or/and 10mmHg reduction in office blood pressure (OBP) on 3 months visit will be set to categorize the patients to responders or non-responders after RDN. The qualitative and quantitative differences of proteins between the two groups of patients will be investigated, based on proteomic analysis results, in order to determine specific urine proteins with predictive role in blood pressure response. The study results are expected to determine the predictive role of urine proteomics in optimal selection of hypertensive patients who will undergo renal denervation.