The Cognitive Ageing Nutrition and Neurogenesis (CANN) Trial

Mild Cognitive Impairment Clinical Trial

— CANN  

Official title:

A Randomised Controlled Trial in 'At Risk' Humans Investigating the Cognitive Benefits of a Combined Flavonoid/Fatty Acid Intervention and Underlying Mechanisms of Action: The COGNITIVE AGING NUTRITION and NEUROGENESIS (CANN) Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02525198
• Other study ID #: R21647
• Status: Completed
• Phase: N/A
• Start date: August 1, 2015
• Est. completion date: March 31, 2018

Study information

• Verified date: November 2023
• Source: University of East Anglia
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

There is a dearth of research which takes a multi-compound approach to dietary interventions, in humans, aimed at improving outcome measures of cognition. Animal research in particular points towards fatty acids and flavonoids having a potentiating effect on each other, and possibly even being synergistic. Thus, study products will be administered in the present trial comprising both of these compounds, with a view to investigating their potential effects on cognition in older adults with mild cognitive impairment (MCI) or subjective memory impairment (SMI).

Description:

240 participants, aged 55 or above, will be recruited (120 Norwich, 120 Melbourne; to include both MCI and SCI participants). Participants will be asked to take the study food each day for 12 months, and to come to the clinical assessment unit on 3 occasions, at baseline, 3 months and 12 months, to complete a cognitive task battery such that their performance may be investigated in the context of the intervention. Urine, blood and faecal samples will be collected and magnetic resonance imaging (MRI) will be applicable to half of each population (i.e to 60 MCI and 60 SCI, 30 of each at Norwich and Melbourne).

Recruitment information / eligibility

• Status: Completed
• Enrollment: 259
• Est. completion date: March 31, 2018
• Est. primary completion date: March 31, 2018
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 55 Years and older

Eligibility

Inclusion Criteria:

• Male and female, aged = 55 years
• Mild cognitive impairment (MCI) or subjective memory impairment (SMI) with no indication of clinical dementia or depression
• Willing and able to provide written informed consent.
• Understands and is willing and able to comply with all study procedures.
• Fluent in written and spoken English.
• In good general health including blood biochemical, haematological and urinalysis within the normal range at screening (as judged by the clinical advisor)
• Normal, or corrected to normal vision and hearing
• Right handed, for MRI
• Stable use of any prescribed medication for at least four weeks

Exclusion Criteria:

• Diagnosis of Alzheimer's disease (AD) or other form of dementia or significant neurological disorder
• Parent or sibling who developed premature dementia <60y (suggestive of a familial monogenic form of cognitive decline)
• Past history or MRI evidence of brain damage including significant trauma, stroke, learning difficulties or serious neurological disorder, including loss of consciousness > 24 hours
• History of alcohol or drug dependency within the last 2 years
• Other clinically diagnosed psychiatric disorder likely to affect the cognitive measures (as judged by clinical adviser)
• Existing diagnosed gastrointestinal disorders likely to impact on absorption of flavonoids and fatty acids (as judged by clinical adviser)
• Major cardiovascular event, e.g. myocardial infarction or stroke, in the last 12 months
• Carotid stents or severe stenosis
• Known allergy to fish or any other component in the intervention supplements
• Existing medical conditions likely to affect the study measures (as judged by clinical adviser)
• Uncontrolled hypertension (Systolic Blood Pressure (SBP) >140mmHg, Diastolic Blood Pressure (DBP) >90mmHg)
• BMI >40kg/m2

Related Conditions & MeSH terms

• Cognitive Dysfunction
• Mild Cognitive Impairment
• Subjective Memory Impairment

Intervention

Dietary Supplement:
• fatty acid/flavonoid blend
see arm description
• Placebo
see arm description

Locations

Country	Name	City	State
Australia	Centre for Human Psychopharmacology, Swinburne Univerity of Technology	Melbourne	Victoria
United Kingdom	Department of Nutrition, University of East Anglia	Norwich	Norfolk
United States	Beckman Institute, University of Illinois	Urbana	Illinois

Sponsors (3)

Lead Sponsor	Collaborator
University of East Anglia	Swinburne University of Technology, University of Illinois at Chicago

Countries where clinical trial is conducted

United States,  Australia,  United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Number of false positive responses during the picture recognition task of the CDR Computerized Cognitive Assessment System	The CDR Computerized Cognitive Assessment System will be used to measure the cognitive effects of the treatments. The battery is sensitive to bidirectional cognitive change including trials in MCI, dementia and SMI. There is strong converging evidence that one particular aspect of performance, namely the number of false positive responses during a picture recognition task, is particularly sensitive to hippocampal integrity (based on activation of the dentate gyrus during the task, and specific decrements in conditions associated with poorer hippocampal function). This will form the primary outcome in this study.	12 months
Secondary	Hippocampal volume	To be measured on magnetic resonance imaging	12 months
Secondary	Gut microflora speciation and metabolism	Measured in faecal samples. By extension, we also seek to consider the contribution of the microflora to cognition function and its response to treatment.	12 months
Secondary	Association between baseline APOE status and number of false positive responses during the picture recognition task of the CDR Computerized Cognitive Assessment System	We will assess the impact of intervention in respect to presence or absence of APOE 4 gene across participants, which is a risk factor for dementia.	12 months
Secondary	Circulating biomarkers of cognition	Biomarkers to include BDNF, ß-amyloid, plasma lipids, inflammatory markers, nitric oxide and fatty acids, flavonoids and their metabolites (plasma and urine)	12 months
Secondary	Circulating biomarkers of cardiovascular health	Biomarkers to include BDNF, ß-amyloid, plasma lipids, inflammatory markers, nitric oxide and fatty acids, flavonoids and their metabolites (plasma and urine)	12 months
Secondary	Language ability on the Boston Naming Test	Allows for categorization according to cognitive status (mild cognitive impairment, dementia, subjective memory impairment)	12 months
Secondary	Visuospatial ability on the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) Figure Copy test	Allows for categorization according to cognitive status (mild cognitive impairment, dementia, subjective memory impairment)	12 months
Secondary	Attention ability on the Digit Span task	Allows for categorization according to cognitive status (mild cognitive impairment, dementia, subjective memory impairment)	12 months
Secondary	Executive function on the Trail Making Task	Allows for categorization according to cognitive status (mild cognitive impairment, dementia, subjective memory impairment)	12 months
Secondary	Cerebrovascular blood flow	To be measured on spectroscopy	12 months
Secondary	Measurement of blood brain barrier permeability	Allows testing of the hypothesis that the test food will help improve BBB permeability through its action on endothelial function. Six axial slices will be measured every 1.34 seconds for 8 minutes.	8 minutes