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Uric AcidNCT04960527

Acute Effects of Tart Cherry on Uric Acid and Biomarkers of CVD Risk in Healthy Individuals

A study testing Tart cherry juice and Water in people with Uric Acid and Cardiovascular Diseases, run by Sheffield Hallam University at 1 site in United Kingdom.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This study aims to provide evidence as to whether consumption of tart cherry juice can reduce the risk of gout and cardiovascular disease (CVD) in an acute context. The proposed study is a 2-way cross-over, randomised, placebo-controlled trial and aims to answer the following research questions: 1. Read more about this study

Who is it for?
Ages 18 to 85 yearsHealthy volunteers can take part
Conditions the study is for
Uric Acid, Cardiovascular Diseases, Gout
What is being tested?
Tart cherry juice and Water
Could I receive a placebo?
No, everyone receives an active treatment
How many people
13 participants
Where
1 siteUnited Kingdom
Study dates
10 Jul 2021to 28 Feb 2022
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 85 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • aged 18 years or over
  • able and willing to participate in the study and provide written informed consent

Who cannot join

  • current smoker
  • any known food allergies/intolerances
  • history of medical conditions, including gastrointestinal disease, severe renal impairment (estimated glomerular filtration rate of <30ml/min) or renal disease, cardiovascular disease, diabetes (type 1 or type 2) and gout

Trial locations and contacts

1 site in 1 country.

United Kingdom1 site
  • Food and Nutrition Group, Sheffield Hallam University

    Sheffield, S1 1WB

Other trials in United Kingdom

About this study

Official title: The Acute Effects of Tart Cherry Juice on Uric Acid and Biomarkers of Cardiovascular Disease Risk in Healthy Individuals

This study aims to provide evidence as to whether consumption of tart cherry juice can reduce the risk of gout and cardiovascular disease (CVD) in an acute context. The proposed study is a 2-way cross-over, randomised, placebo-controlled trial and aims to answer the following research questions:

  1. What effect does a single 30mL serving of tart cherry concentrate have on serum uric acid and urinary excretion of uric acid in healthy individuals, when compared with water?
  2. What effect does a single 30mL serving of tart cherry concentrate have on markers of cardiovascular disease risk and oxidative stress in healthy individuals, when compared with water?

By measuring acute changes in serum urate, fractional urinary urate excretion, inflammatory markers, oxidative stress markers and CVD risk markers (namely central and brachial blood pressure, and arterial stiffness), it will highlight possible mechanisms through which tart cherry may reduce risk of gout and/or CVD.

Read the detailed description

Healthy, non-smoking, adult volunteers (n = 15) will be recruited to a 2-way cross-over, randomized, placebo-controlled study.

A sample size of 13 has been calculated using data from White et al. (2018), using the primary outcome of change in serum uric acid level. Between-person variations in serum urate was established at approximately 50 µmol/L. Within-subject variation to apple juice was approximately 35 µmol/L. It has been estimated that cherry juice will produce a fall in serum urate of approximately 15 µmol/L (Jacob et al., 2003). Therefore, 13 participants will be needed to detect this change with 80% power at an alpha level of 0.05.

Participants will avoid strenuous exercise for 72-hours prior to the study until 24-hours post-consumption of the test drinks; compliance will be assessed through completion of a physical activity diary. They will also follow a low-polyphenolic diet for 48-hours prior to the study until 24-hours post-consumption of the test drinks; participants will be provided with a list of foods/drinks to avoid and compliance will be assessed through completion of a food diary. Participants will be provided with instructions of foods to avoid and a low polyphenolic pasta ready-meal, dessert and low nitrate water to consume the evening preceding the study day.

Participants will attend the laboratory following an overnight fast. Blood pressure (central and brachial) and arterial stiffness will be measured using a non-invasive Vicorder device. A venepuncture blood sample will be collected by a researcher trained in phlebotomy before consumption of the test drink. Approximately 10 ml of blood will be taken during each venepuncture. A urine sample will also be collected. Participants will consume 250 ml of tart cherry juice or neutral control (water) on two occasions, at least one week apart; the sequence order will be random. The cherry juice comprises 30 mL tart cherry concentrate diluted with 220 mL water. Further venous blood samples will be taken at 1 and 2 hours post-consumption. These will be supplemented with finger-prick samples collected at 3, 5 and 24 hours post drink. Post-drink measures of arterial stiffness will be taken at 1, 2, 3, 5 and 24-hours post-consumption. Additional urine samples will also be collected between 0-2, 2-4, 4-5, 5-8, 8-11, and 11-24 hours, post-consumption of the test drinks. Participants' water intake during each laboratory visit will be standardised at 500 ml. Participants will be provided with a low-polyphenolic sandwich lunch, pasta ready-meal dinner, dessert, snacks and low nitrate water to consume following the 5-hour measurements. Participants will return to the laboratory the next morning following a 12-hour fast for their 24-hour measurements.

Blood will be analysed for serum uric acid and creatinine concentrations at all time points and for CRP (a measure of inflammation) at baseline, 2, and 5 hours, post-drink. White blood cells (lymphocytes) will be separated from whole venous blood samples collected at baseline, 1 and 2-hours post-drink consumption for the analysis of oxidative DNA damage. Urine samples will be analysed for uric acid and creatinine to calculate fractional excretion of urinary uric acid (using a commercial colorimetric assay). Polyphenolic metabolites from the test drink will also be analysed in urine samples.

Data analysis: The effect of the treatment (tart cherry versus water) on all outcome variables will be analysed with 2-way repeated measures ANOVAs. A statistical significance level of P≤ 0.05 will be set.

Being tested
Tart cherry juice, Water
Medical subject headings
Cardiovascular Diseases, Gout

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Tart cherry juiceDietary supplement

    250 mL tart cherry juice (30 mL tart cherry concentrate [CherryActive, UK] diluted with 220 mL water) is consumed on a single occasion by each participant. This will be consumed immediately following the baseline measurements one laboratory visit.

  • WaterOther

    250 mL water is consumed on a single occasion by each participant. This will be consumed immediately following the baseline measurements one laboratory visit.

Study groups in NCT04960527
Study groupRoleWhat they receive
Tart cherry juiceExperimental30 mL tart cherry concentrate (CherryActive, UK, 100% Montmorency) diluted with 220 mL water (totalling 250 mL). According to available manufacturers data, this is equivalent to consuming 90-100 fresh cherries.
Receives: Dietary Supplement: Tart cherry juice
WaterOther250 mL water (neutral control)
Receives: Other: Water

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in serum urate (in millimoles per litre (mmol/l)

    Difference in serum urate in tart cherry juice arm versus water arm from baseline to 24 hours post-consumption of drink. Measured using a commercial fluorometric/colorimetric urate assay kit.

    Measured: Measured at baseline, 1, 2, 3, 5 and 24 hours post-consumption of test drink

Secondary outcomes (7)
  1. Change in urinary urate (mmol/l)

    Difference in urinary urate in tart cherry juice arm versus water arm from baseline to 24 hours post-drink consumption. Measured using a commercial fluorometric/colorimetric assay kit

    Measured: Measured from samples collected at baseline and between 0-2 hours, 2-4 hours, 4-5 hours, 5-8 hours, 8-11 hours and 11-24 hours

  2. Change in urinary creatinine (mmol/l)

    Difference in urinary creatinine in tart cherry juice arm versus water arm from baseline hours to 24 hours post-drink consumption. Measured using a commercial fluorometric/colorimetric assay kit

    Measured: Measured from samples collected at baseline and between 0-2 hours, 2-4 hours, 4-5 hours, 5-8 hours, 8-11 hours and 11-24 hours

  3. Change in serum creatinine (mmol/l)

    Difference in serum creatinine in tart cherry juice arm versus water arm from baseline to 24 hours post-drink consumption. Measured using a commercial fluorometric/colorimetric assay kit

    Measured: Measured at baseline, 1, 2, 3, 5 and 24 hours post-consumption of test drink

  4. Change in c reactive protein (in milligrams per litre (mg/l)

    Difference in serum c reactive protein (CRP) in tart cherry juice arm versus water arm from baseline to 5 hours post-consumption of drink. Measured using an enzyme-linked immunosorbent assay (ELISA).

    Measured: Measured at baseline, 2 and 5 hours post-consumption of test drink

  5. Change in blood pressure (in millimetres of mercury (mmHg))

    Difference in brachial and central blood pressure in tart cherry juice arm versus water arm from baseline to 24 hours post-consumption of drink. Measured using a Vicorder non-invasive device.

    Measured: Measured at baseline, 1, 2, 3, 5, and 24-hours post-consumption of test drink

  6. Change in arterial stiffness (Augmentation index measured in %, pulse wave velocity measured in meters per second (m/s))

    Difference in augmentation index (AI) and pulse wave velocity (PWV) in tart cherry juice arm versus water arm from baseline to 24 hours post-consumption of drink. Measured using a Vicorder non-invasive device.

    Measured: Measured at baseline, 1, 2, 3, 5, and 24-hours post-consumption of test drink

  7. Change in oxidative damage (in percentage (%) of tail DNA)

    Difference in markers of oxidative stress in tart cherry juice arm versus water arm from baseline to 2 hours post-consumption of drink. Measured using single-cell electrophoresis 'comet assay' as 8-oxo-dg levels in lymphocytes.

    Measured: Measured at baseline, 1 and 2 hours post-consumption of test drink

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Jul 2021
  2. Study start10 Jul 2021
  3. Primary completion28 Feb 2022
  4. Study completion28 Feb 2022

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Crossover
Model description
2-way crossover, randomised controlled trial. Participants will be allocated to consume tart cherry juice or a neutral water control on separate occasions. The order of this allocation will be randomised.
Masking
None (open label)
Enrolment
13 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04960527
Sponsor's protocol ID
ER9199256
Status last verified
Jun 2024
First submitted
2 Jul 2021
Last updated
27 Jun 2024
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Jacob RA, Spinozzi GM, Simon VA, Kelley DS, Prior RL, Hess-Pierce B, Kader AA. Consumption of cherries lowers plasma urate in healthy women. J Nutr. 2003 Jun;133(6):1826-9. doi: 10.1093/jn/133.6.1826.

    PubMed 12771324
  • White SJ, Carran EL, Reynolds AN, Haszard JJ, Venn BJ. The effects of apples and apple juice on acute plasma uric acid concentration: a randomized controlled trial. Am J Clin Nutr. 2018 Feb 1;107(2):165-172. doi: 10.1093/ajcn/nqx059.

    PubMed 29529161
  • Lynn A, Mathew S, Moore CT, Russell J, Robinson E, Soumpasi V, Barker ME. Effect of a tart cherry juice supplement on arterial stiffness and inflammation in healthy adults: a randomised controlled trial. Plant Foods Hum Nutr. 2014 Jun;69(2):122-7. doi: 10.1007/s11130-014-0409-x.

    PubMed 24570273
  • Chai SC , Davis K , Wright RS , Kuczmarski MF , Zhang Z . Impact of tart cherry juice on systolic blood pressure and low-density lipoprotein cholesterol in older adults: a randomized controlled trial. Food Funct. 2018 Jun 20;9(6):3185-3194. doi: 10.1039/c8fo00468d.

    PubMed 29862410
  • Bell, P. G., Gaze, D. C., Davison, G. W., George, T. W., Scotter, M. J., & Howatson, G. (2014). Montmorency tart cherry (Prunus cerasus L.) concentrate lowers uric acid, independent of plasma cyanidin-3-O-glucosiderutinoside. Journal of Functional Foods, 11, 82-90.

Questions about this trial

What is this clinical trial studying?

A study testing Tart cherry juice and Water in people with Uric Acid and Cardiovascular Diseases, run by Sheffield Hallam University at 1 site in United Kingdom.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 27 Jun 2024. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in serum urate (in millimoles per litre (mmol/l) (time frame: Measured at baseline, 1, 2, 3, 5 and 24 hours post-consumption of test drink). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04960527, which also lists 5 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Jun 2024.

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