Effect of Broccoli Sprout on Blood Levels of Sulforaphane to Reduce Responsiveness of Immune System

Healthy Volunteers Clinical Trial

Official title:

Does Broccoli Sprout Consumption Result in Plasma Sulforaphane Levels That Can Attenuate Leukocyte Activation Ex-vivo in Healthy Human Volunteers?

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01357070
• Other study ID #: 2-bao
• Status: Completed
• Phase: N/A
• Start date: May 2011
• Est. completion date: January 2014

Study information

• Verified date: July 2019
• Source: Imperial College London
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The investigators suggest that inducing anti-oxidant enzymes indirectly may be an effective means of providing vascular protection.

Sulforaphane, a naturally occurring compound found in green vegetables (including broccoli, brussel sprouts and cauliflower) is able to protect against cell inflammatory stress by inducing a number of anti-oxidant molecules. Targeted studies on the consumption of broccoli and related vegetables have been shown to be associated with reduced risk of coronary artery disease.

In the present study the investigators want to test whether the consumption of a "broccoli smoothie" containing sulforaphane can protect white blood cells from becoming activated in the presence of an experimental stress and how long this protective effect lasts for. To do this, the investigators will be analysing inflammatory changes in blood samples taken at different times during the study.

Description:

Atherosclerosis is the disease process that leads to hardening of the arteries which causes them to become narrowed. This occurs because fat is first deposited on the inside walls of the arteries, then becomes hardened by fibrous tissue and calcium deposition forming a semi-hardened accumulation of material known as plaque. As this plaque grows, it narrows the channel within the artery and causes a reduction in blood and oxygen supply to the affected organ - such as the heart and brain. The investigators now understand that this process is caused by inflammation and activation of the immune cells over a period of time. It has been proposed that targeting these immune cells and reducing the levels of immune activation can protect against cardiovascular diseases.

Previously it has been observed that consumption of fruit and vegetables rich in anti-oxidants can confer a protective effect against cardiovascular diseases. The use of anti-oxidants experimentally has shown protective benefits against activation.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 6
• Est. completion date: January 2014
• Est. primary completion date: January 2014
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Age 18+ years

• Able to commit for the two week duration of the trial

Exclusion Criteria:

• Age <18 years

• Pregnancy

• Vegetarian

• History of allergy

• Current smoker or smoking cessation within the last 3 months

• Current use of inhaled, topical or systemic corticosteroids or within the last 2 weeks

• Current use of non-steroidal anti-inflammatory use or within the last 1 week

• Current use of nutritional or multivitamin supplements

• Current participation in any other Randomised controlled trial

Related Conditions & MeSH terms

• Healthy Volunteers

Intervention

Dietary Supplement:
• Brocco-sprout homogenate
Participants will be asked to orally consume on three consecutive days a brocco-sprout homogenate (70g dry weight).
• Alfalfa sprout homogenate
Participants will be asked to orally consume on three consecutive days an alfalfa sprout homogenate.

Locations

Country	Name	City	State
United Kingdom	Cardiovascular Medicine Research Unit, Hammersmith Hospital	London

Sponsors (1)

Lead Sponsor	Collaborator
Imperial College London

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Resistance of leucocytes to inflammatory activation following an experimental stress	Participants will consume a brocco-sprout homogenate. Blood will be sampled for intracellular markers of leukocyte stress after ex-vivo stimulus with Phorbol ester / Tumour Necrosis Factor alpha. The following parameters will be recorded.; Reactive oxygen species detection using aminophenylfluoresceine dye; p38 MAP kinase induction; NF-kB induction	24 hours after consumption of the third homogenate