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Effects on Cognitive Functions and Mood of Food Products Rich in Polyphenols

6. září 2017 aktualizováno: Anne Nilsson, Lund University

Food Design for Improved Cognitive Performance/Effects on Cognitive Functions and Mood of Food Products Rich in Polyphenols

The purpose of this study is to investigate effects of a selected food product rich in polyphenol on cognitive performance and mood.

Přehled studie

Postavení

Dokončeno

Podmínky

Intervence / Léčba

Detailní popis

The metabolic syndrome (MetS) includes a cluster of dysfunctions that identifies subjects at risk of developing type-2 diabetes and cardiovascular disease (CVD). A key feature appears to be chronic increased inflammation and activation of the innate system. Consequently, increased low-grade inflammation has been connected to adverse effects on insulin sensitivity, glucose- and lipid metabolism, and blood pressure, and circulating markers of inflammation such as IL-6. A growing body of evidence also link low-grade inflammation to poorer cognitive functioning. Type 2 diabetes, MetS, and glucose intolerance are increasingly being associated with impaired cognition.

Dietary patterns which promote sub-clinical inflammation are increasingly being considered predictive of future risk of CVD and type-2 diabetes. Epidemiological data shows that a high consumption of vegetables and fruits is associated with a lowered risk of cancer and cardiovascular disease, which may be due to the high concentrations of polyphenols or other anti-oxidants that are found in such foods.

In the presently described project it is hypothesized that four weeks daily consumption of a product specific high in flavanols can improve metabolic risk variables and cognitive functions in healthy subjects.

The purpose is therefore to investigate effects of flavanols on cognitive functions and cardiometabolic risk, and to investigate relations between cardiometabolic risk markers and cognitive performance. The test product is a commonly used food product, known to be specifically rich in flavanols. The effects of the test product is compared with effects of a control product that is based on a similar food product but is lacking flavanols.

Test parameters:

Cognitive tests: Working memory tests (an oral test), selection attention test (measure also reaction time, a computerized test ), and stroop test (a computerized test.

Mood is determined for 6 different mood sensations using VAS scales.

Bio markers in blood: glucose regulation (glucose, insulin), markers of inflammation and oxidative stress (IL-6, MDA, oxLDL), blood lipids (total cholesterol, LDL-cholesterol, HDL-cholesterol, triglycerides), vascular function (P-Selectin, PAI-1, NO), gut hormones involved in metabolism and satiety (PYY, GLP-1) gut hormon involved in mucosa integrity (GLP-2), markers of brain function (BDNF, neurotensin).

Blood pressure.

Typ studie

Intervenční

Zápis (Aktuální)

38

Fáze

  • Nelze použít

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní místa

      • Lund, Švédsko, 223 81
        • Lund Univercity, Medicon village, Functional Food Science Centre

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

50 let až 70 let (Dospělý, Starší dospělý)

Přijímá zdravé dobrovolníky

Ano

Pohlaví způsobilá ke studiu

Všechno

Popis

Inclusion Criteria:

  • Healthy women and men
  • Between 50-70 years
  • BMI 19-25

Exclusion Criteria:

  • Metabolic diseases
  • Food allergies
  • Smoker

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Prevence
  • Přidělení: Randomizované
  • Intervenční model: Crossover Assignment
  • Maskování: Žádné (otevřený štítek)

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: Flavanol rich food product
A portion of a common flavanol rich food product is consumed daily for 4 weeks
polyphenol rich test product
Komparátor placeba: Non-flavanol food product
A portion of a product similar to the experimental Product, but instead contains low amounts of flavanol, is consumed Daily for 4 weeks as a control.
polyphenol rich test product

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
working memory (WM) capacity
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, working memory capacity is determined four times in the postprandial phase up to 3.5h after breakfast.
The test food product or control is consumed fasting, and after 30 min a standardised breakfast is served. WM tests are performed at 60 min, 120 min, 165 min and 210 min after commencing the intake of test Product. One test takes approximately 8 min to carry out.
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, working memory capacity is determined four times in the postprandial phase up to 3.5h after breakfast.

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
mood assessment
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, subjects registered mood sensations at fasting and five times in the postprandial phase up to 3,5h after breakfast.

Self-reported sensations of mood and feelings of activation was assessed with a modified bipolar variant of the Swedish Core Affect Scales (SCAS) comprising six rating scales of two orthogonal dimensions of core affect: valence (unpleasantness-pleasantness) and activation (quietness-excitement).

Mood scales are filled out at fasting, prior to the standardised breakfast served after 30 min and directly after cognitive tests started at 60 min, 120 min, 165 min and 210 min after commencing the intake of test product.

Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, subjects registered mood sensations at fasting and five times in the postprandial phase up to 3,5h after breakfast.

Další výstupní opatření

Měření výsledku
Popis opatření
Časové okno
blood pressure
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, blood pressure is determined at fasting and four times in the postprandial phase up to 3,5h after breakfast.
Blood pressure is determined at fasting and at 60 min, 90 min, 150 min and 180 min, prior to other test variables collected at the same test Point.
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, blood pressure is determined at fasting and four times in the postprandial phase up to 3,5h after breakfast.
glucose regulation
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, blood glucose is determined fasting and then eight times in the postprandial phase up to 3.5h after the standardised breakfast
Blood glucose concentrations (determined in capillary blood), and insulin (determined in venous blood). Blood tests are collected repeatedly during 3h after a standardised breakfast consumed 30 min after commencing the test product/Control Product.
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, blood glucose is determined fasting and then eight times in the postprandial phase up to 3.5h after the standardised breakfast
selective attention (SA)
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, selective attention is determined three times in the postprandial phase up to 3.5h after the standardised breakfast
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, selective attention is determined three times in the postprandial phase up to 3.5h after the standardised breakfast
Vascular function
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, vascular marker is determined fasting and up to 3.5h after the standardised breakfast
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, vascular marker is determined fasting and up to 3.5h after the standardised breakfast
Blood lipids
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, blood lipids are determined fasting and up to 3.5h after the standardised breakfast
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, blood lipids are determined fasting and up to 3.5h after the standardised breakfast
Marker of inflammation
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, inflammatory markers in blood are determined fasting and up to 3.5h after the standardised breakfast
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, inflammatory markers in blood are determined fasting and up to 3.5h after the standardised breakfast
Markers of oxidative stress
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, markers of oxidative stress are determined in blood at fasting and then up to 3.5h after a standised breakfast
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, markers of oxidative stress are determined in blood at fasting and then up to 3.5h after a standised breakfast
Gut peptides
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, gut peptides are determined in blood at fasting
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, gut peptides are determined in blood at fasting
markers of brain function
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, markers of brain finction are determined in blood at fasting
Each of the two intervention periods is 4 weeks. At the first and last day in each intervention periods, markers of brain finction are determined in blood at fasting
Stroop test
Časové okno: Each of the two intervention periods is 4 weeks. At the first and last day Stroop tests are performed three times after a standardised breakfast up to 3,5h .
Each of the two intervention periods is 4 weeks. At the first and last day Stroop tests are performed three times after a standardised breakfast up to 3,5h .

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Spolupracovníci

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia

1. ledna 2014

Primární dokončení (Aktuální)

1. března 2015

Dokončení studie (Aktuální)

1. března 2015

Termíny zápisu do studia

První předloženo

10. září 2014

První předloženo, které splnilo kritéria kontroly kvality

17. září 2014

První zveřejněno (Odhad)

18. září 2014

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

8. září 2017

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

6. září 2017

Naposledy ověřeno

1. září 2017

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • AFC-2013/619

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