- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03088514
Investigation of Dietary Nitrate Effects in Hypertension-induced Target Organ Damage (NITRATE-TOD)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
In hypertension persistent raised blood pressure (BP) is associated with endothelial dysfunction, arterial stiffness and left ventricular (LV) remodeling that are key phenomena associated with the pathogenesis and complications of hypertension.
One of the main substances that the healthy endothelium produces that is responsible for maintaining the patency of blood vessels is nitric oxide (NO). In hypertension, one of the key pathogenic effects is the dysfunction of the endothelium characterized by a decrease in ability to generate nitric oxide (NO). Previous studies have shown that dietary inorganic nitrate supplementation lowers blood pressure (Kapil et al. 2015), however, whether this approach might also improve endothelial function and LV remodeling is unknown. The effects of inorganic nitrate are due to its conversion in the body to inorganic nitrite and thereafter to NO.
This study will assess the effects of dietary inorganic nitrate on LVH using cardiac magnetic resonance imaging (NITRATE-LVH arm). In addition, the effects of dietary inorganic nitrate on central aortic blood pressure, arterial stiffness using pulse wave velocity and endothelial function using flow mediated dilatation will be evaluated (NITRATE-CBP arm).
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Contact
- Name: Amrita Ahulwalia, BSc PhD
- Phone Number: 02078825720
- Email: a.ahluwalia@qmul.ac.uk
Study Contact Backup
- Name: Clement Lau, MBChB (Hons)
- Phone Number: 02078825720
- Email: c.lau@qmul.ac.uk
Study Locations
-
-
-
London, United Kingdom
- Queen Mary University of London
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Patients will be enrolled following an informed consent. The subject will be able to understand and comply with protocol requirements, instructions and protocol restrictions.
- Aged 18-80 years.
- The study subjects will be hypertensives with evidence of difficulty treating to target BP (daytime ABPM 135-170/85-105 mmHg) on 1 or more antihypertensive agents, with insufficient efficacy or intolerance of medications.
- For NITRATE LVH, echocardiographic evidence of LV hypertrophy (LV mass indexed to body surface area (BSA); males >115g/m2; females >95 g/m2).
- Patients will have been established on an antihypertensive treatment regime for at least 1 month by the time of participation in the study and will not require changes in pharmacological intervention for the duration of the trial.
Exclusion Criteria:
Unless specified, a subject will not be eligible for inclusion in this study if any of the following criteria apply:
- History of chronic viral hepatitis (including presence of hepatitis B surface antigen or hepatitis C antibody), or other chronic hepatic disorders.
- History of increased liver function tests (ALT, AST) due to acute or chronic liver conditions, 3x above the upper limit of normal or bilirubin 1.5x above the upper limit of normal at screening.
- Renal impairment with creatinine clearance (eGFR) of <50 ml/min at screening.
- Patients with diabetes mellitus, defined by previous history of diabetes or HbA1c >6.5% (>48 mmol/mol) at screening.
- Subjects with LDLc, >7.5 mmol/l. TG level >10mmol/l.
- History of heart failure defined as NYHA class II - IV or those with known LV dysfunction (EF<40%) regardless of symptomatic status
- History of malignancy within the past 5 years, other than non-melanoma skin cancer.
- Current life-threatening condition other than vascular disease (e.g. very severe chronic airways disease, HIV positive, life-threatening arrhythmias) that may prevent a subject from completing the study.
- Use of an investigational device or investigational drug within 30 days or 5 half-lives (whichever is longer) preceding the first dose of study medication.
- Subjects who will commence or who are likely to commence regular treatment with non-steroidal anti-inflammatory drugs (NSAIDs) (other than aspirin), from screening until study completion.
- Any non-stable dosing of ongoing medication regimens throughout the study trial.
- Drug abuse within the past 6 months.
- The subject has a three-month prior history of regular alcohol consumption exceeding an average weekly intake of > 28 units (or an average daily intake of greater than 3 units) for males, or an average weekly intake of > 21 units (or an average daily intake of greater than 2 units) for females. 1 unit is equivalent to a half-pint (284mL) of beer/lager; 25mL measure of spirits or 125mL of wine.
- Any other subject whom the Investigator deems unsuitable for the study (e.g. due to other medical reasons, laboratory abnormalities, expected study medication noncompliance, or subject's unwillingness to comply with all study-related study procedures).
- Subjects with rheumatoid arthritis, connective tissue disorders and other conditions known to be associated with chronic inflammation (e.g. Inflammatory Bowel Disease).
- Subjects with any acute infection, or recent systemic (oral or IV) antibiotics within 1 month of screening, or significant trauma (burns, fractures).
- Subjects who have donated more than 500 mL of blood within 56 days prior to the study medication administration.
- Self reported use of anti-microbial mouthwash or tongue scrapes.
- Concomitant xanthine oxidase inhibitors (such as allopurinol).
- Known history of significant claustrophobia, previous intolerance of CMR imaging or known (or suspected) incompatible metallic implant.
- Pregnancy.
- Allergy to gadolinium-based contrast agents used for CMR.
- Patients with known LVH caused by another established pathology diagnosed prior to or at screening e.g. severe aortic stenosis, hypertrophic cardiomyopathy, amyloidosis and Fabry's disease.
Exceptions to the exclusion criteria:
- For criteria 18, patients can enter the trial if they discontinue the use of anti-microbial mouthwash for the duration of the clinical trial.
- nCriteria 20 and 22 do not apply to participants who will not have a CMR scan in the NITRATE-CBP arm
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: NITRATE-LVH intervention
70ml of beetroot juice (approximately 6-8 mmol of inorganic nitrate) once a day for 4 months
|
Beetroot juice (70ml daily) with or without inorganic nitrate
|
Placebo Comparator: NITRATE-LVH placebo
70ml of beetroot juice (no inorganic nitrate) once a day for 4 months
|
Beetroot juice (70ml daily) with or without inorganic nitrate
|
Experimental: NITRATE-CBP intervention
70ml of beetroot juice (approximately 6-8 mmol of inorganic nitrate) once a day for 4 month
|
Beetroot juice (70ml daily) with or without inorganic nitrate
|
Placebo Comparator: NITRATE-CBP placebo
70ml of beetroot juice (no inorganic nitrate) once a day for 4 months
|
Beetroot juice (70ml daily) with or without inorganic nitrate
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Left ventricular hypertrophy regression
Time Frame: 4 months
|
change in LV mass as assessed using cardiac magnetic resonance imaging
|
4 months
|
Pulse wave velocity
Time Frame: 4 months
|
non-invasive measures of arterial stiffness
|
4 months
|
Central blood pressure
Time Frame: 4 months
|
non-invasive measure of central blood pressure
|
4 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Flow mediated dilatation (FMD)
Time Frame: 4 months
|
non-invasive measure of endothelial function using ultrasound
|
4 months
|
Brachial blood pressure
Time Frame: 4 months
|
brachial blood pressure
|
4 months
|
Change in plasma nitrate levels
Time Frame: 4 months
|
assessed by chemiluminescence
|
4 months
|
Change in plasma nitrite levels
Time Frame: 4 months
|
assessed by chemiluminescence
|
4 months
|
Change in nitric oxide activity (cGMP)
Time Frame: 4 months
|
nitric oxide activity measured by determining plasma concentrations of cyclic guanosine monophosphate (cGMP)
|
4 months
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Amrita Ahulwalia, BSc PhD, Queen Mary University of London
Publications and helpful links
General Publications
- Kapil V, Khambata RS, Robertson A, Caulfield MJ, Ahluwalia A. Dietary nitrate provides sustained blood pressure lowering in hypertensive patients: a randomized, phase 2, double-blind, placebo-controlled study. Hypertension. 2015 Feb;65(2):320-7. doi: 10.1161/HYPERTENSIONAHA.114.04675. Epub 2014 Nov 24.
- Lau CWZ, Hamers AJP, Rathod KS, Shabbir A, Cooper J, Primus CP, Davies C, Mathur A, Moon JC, Kapil V, Ahluwalia A. Randomised, double-blind, placebo-controlled clinical trial investigating the effects of inorganic nitrate in hypertension-induced target organ damage: protocol of the NITRATE-TOD study in the UK. BMJ Open. 2020 Jan 21;10(1):e034399. doi: 10.1136/bmjopen-2019-034399.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 10/H0703/98
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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.
Clinical Trials on Hypertension
-
National Taiwan University Hospital Hsin-Chu BranchRecruitingHypertension,Essential | Hypertension, MaskedTaiwan
-
University of Alabama at BirminghamTroy UniversityCompletedHypertension | Hypertension, Resistant to Conventional Therapy | Uncontrolled Hypertension | Hypertension, White CoatUnited States
-
BayerCompletedPrimary HypertensionChina
-
Addpharma Inc.Completed
-
Columbia UniversityAgency for Healthcare Research and Quality (AHRQ)Active, not recruitingWhite Coat Hypertension | Hypertension,EssentialUnited States
-
Universidade Federal de Santa MariaCompletedHealthy Volunteers | Hypertension, EssentialBrazil
-
Sulaiman AlRajhi CollegesUnknownHypertension, Essential | β-hydroxybutyrate
-
Centre Chirurgical Marie LannelongueUnknownChronic Thrombo-embolic Pulmonary Hypertension and Pulmonary Arterial HypertensionFrance
-
Cytos Biotechnology AGCompletedMild Essential Hypertension | Moderate Essential HypertensionSwitzerland
Clinical Trials on Beetroot juice
-
Universidad Francisco de VitoriaUniversity of Alcala; University of SevilleCompleted
-
Bangor UniversityCompleted
-
University Hospital, GhentUniversity GhentTerminated
-
Queen Mary University of LondonCompleted
-
University of ManchesterCompleted
-
University of Colorado, BoulderRecruitingChronic Kidney DiseaseUnited States
-
Penn State UniversityActive, not recruitingMetabolic SyndromeUnited States
-
Wake Forest University Health SciencesCompletedStroke | Ischemic Stroke | Cerebrovascular AccidentUnited States
-
Universidad Autonoma de MadridUniversidad Politecnica de Madrid; Camilo Jose Cela UniversityCompletedNitrates | Nutrition | Physical Performance | Sport Physiology | Elite Athletes
-
University of ReadingSaudi Cultural BureauCompletedNo Dental Disease | Non-smokingUnited Kingdom