The Predictive Role of Urinary Proteomics in Blood Pressure Response of Obese Hypertensive Treated With Irbesartan or Eplerenone.

January 5, 2024 updated by: Konstantinos Tsioufis, Hippocration General Hospital

Despite the available means of treating primary arterial hypertension, the prevalence of hypertensive patients with inadequately controlled blood pressure levels, remains high. The identification of biomarkers with prognostic and predictive roles seems to play an important role in the management of hypertensive patients. Proteomic analysis studies provide encouraging results in the identification of such biomarkers.

The goal of this clinical study is to is to highlight peptides through urinary proteomic analysis of obese hypertensive patients, capable of predicting blood pressure response, following treatment with irbesartan or eplerenone.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Background :

Hypertension remains the most prevalent modifiable risk factor associated with cardiovascular morbidity and mortality, however un-optimally treated hypertension prevalence remains alarmingly high. Variable blood pressure response to pharmacological treatment, physician inertia and lack of patient's compliance due to polypharmacy, are the main reasons behind non optimal blood pressure treatment. The multifactorial nature of hypertension has long been described, with various environmental, genetic and epi-genetic factors involved in its pathogenesis and progression. Therefore, scientific interest is starting to shift towards precision medicine, as a medical model for disease prevention and tailored treatment that incorporates individual, genetic, environmental and experiential variability. Το this end, proteomic analysis is an emerging representative in the research of predictive biomarkers.

Proteomic analysis consists of the qualitive and quantitative analysis of the final proteins in bodily fluids. A simplified approach constitutes of sample acquisition, protein extraction and separation through high-resolution electrophoresis and chromatography-based techniques, protein sequence determination with mass spectrometry-based analysis and protein identification with bioinformatic techniques in referential databases. Various small scale clinical trials have highlighted the clinical significance if proteomic analysis, ranging from identifying biomarkers able to determine the blood pressure response following treatment with spironolactone in patients with resistant hypertension, predicting pre-eclampsia through the urinary proteome even in early stages of gestation.

Obesity and essential hypertension are two pathological entities that often coexist. Data from the Framingham study suggesting a twofold risk of obese patients developing hypertension compared to underweight ones, while similar associations have been described by the NHANES III, MONICA, and Health, Aging and Body Composition Study studies, between increases in blood pressure, as a result of increases in BMI, waist circumference, and visceral fat, respectively. The mechanisms through which obesity leads to the development of hypertension, are a complex pathophysiological phenomenon under constant research and study, including the activation of the Sympathetic Nervous System, disorder of renal sodium excretion, excessive renin-angiotensin-aldosterone axis activation and endothelial dysfunction. Angiotensin 2 receptor blockers like Irbesartan, have long been used as first-line pharmacological treatment, however clinical trials including ASPIRANT, PATHWAY-2, and RALES study, have highlighted the role of aldosterone receptor blockers in obese hypertensive patients. Spironolactone and eplerenone are the main oral representatives of this group, with the latter showing less frequent side effects as well as higher binding specificity for the mineralocorticoid- receptor.

Aim of the study:

The main purpose of this study is to investigate the potential predictive role of urinary proteomics, in blood pressure response of obese hypertensive patients, after treatment with irbesartan or eplerenone. This hypothesis may lead to the emergence of urinary biomarkers able to predict blood pressure response in obese hypertensive patients.

Study design:

In this interventional study, untreated obese hypertensive patients will be randomized to two pharmacological treatment arms. Blood pressure response will be assessed based on a baseline visit prior to the initiation of pharmacological treatment and a follow-up visit after an 8-week interval. Patients will be categorized as either responders or non-responders based on the changes in their blood pressure levels. The analysis of patients' baseline urinary samples will be conducted using Liquid Chromatography with tandem mass spectrometry (LC-MS/MS). The examination of individual urinary peptides, along with the evaluation of blood pressure response, will be employed to pinpoint distinct urinary proteins that can act as indicators predicting the response to blood pressure alterations after pharmacological treatment.

Methods:

A total of 50 untreated obese hypertensive adults, will be randomized to irbesartan 150mg once daily, or eplerenone 25mg twice daily.

Patients will undergo a detailed medical history questionnaire and clinical-laboratory examination, in order to ensure that the inclusion and exclusion criteria are met. For inclusion in the study, signed informed consent will be required, after detailed briefing on the study procedure and objectives, as well as potential risks. Ethics approval has been obtained from the hospital's ethical committee board.

Baseline blood pressure levels will be determined with ambulatory blood pressure measurement (ABPM), office blood pressure measurement (OBP) and home blood pressure measurement (HBP). Before treatment initiation, a urinary sample will be collected and stored under appropriate conditions, until subjected to proteomic analysis. Patient data will be recorded anonymously in an electronic database, through which randomization of patients will be carried out. Following randomization, medication stored appropriately on-site, will be administered to each patient.

The participants will undergo a follow-up visit after 8 weeks, where blood pressure response will be determined with ABPM, OBP and HBP. Adherence to treatment will be determined though a medication diary, provided at baseline visit. Patients with ≥ 5mmHg reduction in systolic mean ABPM and/or ≥10mmHg systolic OBP reduction will be considered responders to the corresponding treatment.

Stored urinary samples will undergo liquid chromatography with tandem mass spectrometry (LC-MS/MS) analysis. Data will be processed and cross-referenced with bioinformatics software and databases for protein identification. To establish the certainty of the protein identification false discovery rate (FDR) validation will be based on q value, with target FDR: 0.05. Peptide distribution of intensity between responders and non responders will be assessed, to establish differential expression in each arm. Differential expression will be measured in fold change, as the relative difference in protein abundance between the two conditions. Student's t-test or Mann Whitney non-parametric test will be used.

Study Type

Interventional

Enrollment (Estimated)

50

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

  • Name: Sotirios Drogkaris, MD, MsC
  • Phone Number: 0030 6942203728
  • Email: dsotiris@gmail.com

Study Locations

  • Greece
      • Athens, Greece, 115 27
        • Recruiting
        • Hypertension Unit, A' University Cardiology Clinic, Hippocration General Hospital of Athens
        • Contact:
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Systolic office blood pressure 140-179mmHg and/or diastolic office blood pressure 90-119mmHg
  • Mean systolic 24h ABPM >130mmHg and/or mean diastolic ABPM >80mmHg
  • Obese patient with BMI 30-39.99kg/m2
  • Signed informed consent

Exclusion Criteria:

  • Participation in an Investigational Medicinal Product (IMP) or invasive device clinical trial during the study or in the last 6 months
  • Patient with secondary arterial hypertension
  • Patient with a history within 6 months of: Myocardial infarction, Unstable angina, Stroke
  • Patient with type 1 diabetes
  • Patient with systolic heart failure EF≤40%
  • Patient with chronic kidney disease (eGFR<45mL/min/1.73m2)
  • Patient with bilateral renal artery stenosis
  • Patient with hyperkalemia (>5.5 mEq/L)
  • Patient with hemodynamically significant valvular heart disease
  • Patient with Addison's disease
  • Female patient in pregnancy or caesarean section or female patient planning pregnancy.
  • Planned surgery or cardiovascular surgery in the next 6 months
  • Patient with absolute contraindication to any EDPS
  • Patient who needs to receive study medication for a different reason
  • Patient with neoplasia undergoing treatment (radiotherapy, chemotherapy, immunotherapy)
  • Patient with synchronous systemic disease with a survival expectancy less than the end of the study
  • Any condition that, in the judgment of the investigator, may adversely affect the efficacy and/or safety of the Investigational Medicinal Products (IEDs) (alcohol abuse, drug use, mental retardation)
  • Patient who has received treatment with systemic corticosteroids at least 3 months before joining the study
  • Patient receiving α-blockers with the exception of alfuzosin and tamsulosin for prostatic symptoms

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Irbesartan group
Randomized obese hypertensive patients will receive treatment with oral Irbesartan 150mg once daily for 8 weeks. Blood pressure response will be assessed at that time.
Drug: Irbesartan 150mg
Irbesartan group will be treated with Irbesartan 150mg once daily for a total of 8 weeks.
Other Names:
  • I
Active Comparator: Eplerenone group
Randomized obese hypertensive patients will receive treatment with oral Eplerenone twice daily for 8 weeks. Blood pressure response will be assessed at that time.
Drug: Eplerenone 25 mg
Eplerenone group will be treated with Eplerenone 25mg twice daily for a total of 8 weeks
Other Names:
  • E

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Urinary peptide differential expression between responders and non-responders, in patients treated with Irbesartan
Time Frame: 8 weeks
Utilizing liquid chromatography with tandem mass spectrometry (LC/MS-MS) the relative difference in protein abundance between responders and non-responders will be measured, expressed in fold change. Peptides with statistically significant differential expression between the two groups, may be used as urinary biomarkers for blood pressure response.
8 weeks
Urinary peptide differential expression between responders and non-responders, in patients treated with Eplerenone
Time Frame: 8 weeks
Utilizing LC/MS-MS, the relative difference in protein abundance between responders and non-responders will be measured, expressed in fold change. Peptides with statistically significant differential expression between the two groups, may be used as urinary biomarkers for blood pressure response.
8 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hippocration General Hospital

Collaborators

National and Kapodistrian University of Athens

Investigators

  • Principal Investigator: Konstantinos P Tsioufis, Prof, First University Cardiology Clinic, Hippocration General Hospital of Athens

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 1, 2023

Primary Completion (Estimated)

December 1, 2024

Study Completion (Estimated)

February 1, 2025

Study Registration Dates

First Submitted

January 5, 2024

First Submitted That Met QC Criteria

January 5, 2024

First Posted (Actual)

January 17, 2024

Study Record Updates

Last Update Posted (Actual)

January 17, 2024

Last Update Submitted That Met QC Criteria

January 5, 2024

Last Verified

January 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PREDICT-HTN

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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