Impact of AGEs on Metabolism & Cognition (AGEs)
Do Dietary AGEs Have an Acute Effect on Metabolism and Cognition
調査の概要
状態
条件
詳細な説明
This study will be a short-term, randomized, double-blind, cross-over trial. Volunteers will be younger (18-30 years) and older (55-75 years) men and women, normal and overweight (BMI>19 to 29.9). N=24 in each age group.
Medical screening for all study volunteers and neuropsychological screening will be carried out prior to study start. A small, pin prick, fasted blood sample will be taken to measure glucose and HbA1C levels to rule out type 2 diabetics. Anthropometric and body composition measurements will also be taken. Body weight and height will be measured using a scale and a stadiometer to the nearest 0.5 kg and 0.5 cm, respectively. Waist and hip circumferences will be measured and the waist-to-hip ratio calculated. Standard procedures will be followed for the anthropometric measurements and the average of three measurements taken. Neuropsychological screening may be repeated on another day if volunteers are borderline on their first visit as scores may vary by a couple of points depending on external events i.e. vounteers are having a bad day. Experienced staff will carry out abdominal fat measurements by manual determination of the area between the upper surface of the second lumbar vertebra, the lower surface of the fourth lumbar vertebra, and the lateral margins of the outer rib cage. If the Viscan is available we will use that to measure abdominal fat. Venous blood samples will be collected as appropriate for the hormones and metabolites to be tested and stored at -70 °C.
The day prior to the challenge volunteers will visit the Human Nutrition Unit (HNU, RINH). They will be given a low AGE breakfast and be supplied with a low AGE lunch and dinner for that day and instructed not to consume anything else. After an overnight fast volunteers will receive a one-off dose of either high AGE (11.4 mgs) or low AGE (2.4 mgs) whey protein delivered in a either a low or high fat milkshake (400ml) blended with flavours and a consistent quantity of sugar. All ingredients will be commercially available and of food grade. Apart from differences in fat and AGE the content of shakes will be closely balanced for sugar and other components. All participants will be asked to answer two questionnaires one to determine their habitual intake of dietary AGEs and one to determine their level of physical activity.
The different milkshakes will be tested with a minimum 7 day wash out period between tests. Volunteers will be randomised to each test group. After a 12 h overnight fast and a standardised intake the day prior to the tests, and no strenuous physical activity for 2 days previously, subjects will attend the HNU. Volunteers will be requested to provide a small urine sample for AGE analysis. An intravenous catheter will then be placed in an antecubital vein and flushed with saline between aspirations to keep the catheter clear. After a short resting period, a blood sample will be taken prior to the first memory test then a single milkshake will be consumed under supervision. Blood samples will be taken immediately before the milkshake ingestion (0 min) and after 30, 60, 90, 120, 150 and 180 and 240 min. Further computer based memory tests will be carried out at 30, 90 and 240 minutes. A urine sample will be requested at the end of the study before participants are offered lunch. Memory tests have been designed by Dr Ros Langston (University of Dundee) and Dr Kevin Allan, School of Psychology and will be carried out on lap tops specifically designated for this study. Blood and urine will be analysed for AGEs. Blood will also be analysed for glucose lipids and hormones. Dr Janice Drew will also analyse blood samples for gene expression of the SIRT-1/NAD+ complex indicative of the response of individuals to dietary challenge.
研究の種類
入学 (予想される)
段階
- 適用できない
連絡先と場所
研究場所
-
-
Scotland
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Aberdeen、Scotland、イギリス、AB252ZD
- 募集
- University of Aberdeen Rowett Institute of Nutrition and Health
-
コンタクト:
- Fiona Campbell, PHD
- 電話番号:01224438617
- メール:fiona.campbell@abdn.ac.uk
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コンタクト:
- Christine Grant, HNC Biology
- 電話番号:01224438708
- メール:christine.grant@abdn.ac.uk
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-
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Heathy
- Sedentary
- 18-30 or
- 55-75
Exclusion Criteria:
- diagnosed type 2 diabetes,
- CVD
- history of neurological abnormalities
- current psycho-active medication
- current anti-inflammatory medication
- Current glucose lowering medication
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:防止
- 割り当て:ランダム化
- 介入モデル:クロスオーバー割り当て
- マスキング:ダブル
武器と介入
参加者グループ / アーム |
介入・治療 |
---|---|
他の:Group 1
Group 1 participants in the young 18 - 30 age group
|
low fat, low AGE milkshake given after an overnight fast
low fat, high AGE milkshake given after an overnight fast
high fat, low AGE milkshake given after an overnight fast
high fat, high AGE milkshake given after an overnight fast
|
他の:Group 2
Group 2 participants in the older 55 - 75 age group
|
low fat, low AGE milkshake given after an overnight fast
low fat, high AGE milkshake given after an overnight fast
high fat, low AGE milkshake given after an overnight fast
high fat, high AGE milkshake given after an overnight fast
|
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
---|---|---|
Impact of Advanced Glycation End Products on Metabolism and Cognition
時間枠:Four weeks per participant
|
Habitual AGE intake, determined from dietary questionnaires, specifically designed for this purpose, taken at the start of the study, will be correlated with levels of circulating AGEs and outcomes such as inflammatory markers and expression of genes associated with susceptibility to metabolic disease and acute response to dietary challenge will be measured.
|
Four weeks per participant
|
協力者と研究者
スポンサー
捜査官
- 主任研究者:Fiona Campbell, PHD、UoA Rowett Institute of Nutrition and Health
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (予想される)
研究の完了 (予想される)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
その他の研究ID番号
- 2017/RI/5
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。
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