Very Low Calorie Diet Weight Loss
Omics Profiling of the Response to Food and Variability of Weight Loss in Medically Supervised Very Low Calorie Diet
調査の概要
詳細な説明
The overarching hypothesis is that there are baseline, pre- and post-diet combinations of 'omics' signatures in response to food and nutrients that explain the weight loss response of obese subjects to the very low calorie (VLC) diet.
In order to address the general hypothesis the following specific aims will be addressed:
Specific Aim 1: To test the hypothesis that there is a combination of 'omics' parameters in response to a defined meal that discriminate between morbidly obese subjects.
Specific Aim 2: To test the hypothesis that variation in % weight loss to the 2-weeks of VLC diet is related to baseline genomic markers, gene expression profile, proteomic and metabolomic signatures as well as baseline metabolic and substrates fluxomics response to a defined meal.
Specific Aim 3: To test the hypothesis that variation in % weight loss to the 4-weeks of VLC diet is related to baseline genomic markers, gene expression profile, proteomic and metabolomic signatures as well as baseline metabolic and substrates fluxomics response to a defined meal.
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
-
-
Texas
-
College Station、Texas、アメリカ、77843
- Texas A&M University-CTRAL
-
-
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 obese subjects:
Diagnosed with morbid obesity (defined as BMI > 40 kg/m2 or BMI > 35 kg/m2 with at least one serious comorbidity (2013 NIH compendium guidelines)) Scheduled for medically supervised Very Low Calorie Diet Age 30 years and older Ability to lay in supine or elevated position for 5 hours Willingness and ability to comply with the protocol Exclusion Criteria Any condition that may interfere with the definition 'healthy subject' according to the investigator's judgment (for healthy control group only) Participation in Weight Loss Management Program within the last 6 months prior the first study day Presence of fever within the last 3 days Untreated metabolic diseases including hepatic or renal disorder unrelated to the primary disease Presence of acute illness or metabolically unstable chronic illness unrelated to the primary disease
· (Possible) pregnancy Any other condition according to the PI or nurse that would interfere with the study or safety of the patient Failure to give informed consent Use of protein or amino acid containing nutritional supplements within 3 days of first test day
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：支持療法
- 割り当て：なし
- 介入モデル：単一グループの割り当て
- マスキング：なし（オープンラベル）
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
|
実験的：obese
screening visit: body weight and composition by DXA, height, and vital signs will be assessed. Subjects may sign a medical release form to obtain medical and psychological information about them that will help determine study eligibility or can be used for later coding. 3 study days (one baseline, one approx 2 weeks of diet, one post-diet): muscle mass and function tests, resting energy expenditure, stable isotope infusions with blood draws, and questionnaires regarding quality of life, mood and depression, diet. |
グリセロール、D2O、チロシン、フェニルアラニン、グルコース、アルギニン、シトルリンなど
|
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 |
|---|---|---|
|
正味の全身タンパク質合成の変化
時間枠：0、2、5、10、15、20、30、40、50、60、90、120、150、180、210、225、240、260、280、300、320、340、360 ± 5 分
|
食事摂取後の全身タンパク質合成率の変化
|
0、2、5、10、15、20、30、40、50、60、90、120、150、180、210、225、240、260、280、300、320、340、360 ± 5 分
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Group differences in state of mood as measured by the Hospital Anxiety and Depression Scale (HADS)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
a fourteen item self-assessment scale.
Seven of the items related to anxiety and seven relate to depression.
Each item on the questionnaire is scored from 0-3 and this means that a person can score between 0 (no symptoms) and 21 (severe symptoms) for either anxiety or depression.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Executive Function-Adolescent/Adult Sensory Profile (ASP)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
a standardized self-questionnaire that generates an individualized profile of sensory processing across four quadrants: low registration, sensation seeking, sensory sensitivity, and sensation avoiding.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in quality of life as measured by Short Form (36) Health Survey (SF36)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
self administered questionnaire that measures each of the following eight health concepts: Physical Functioning (PF); Role-Physical (RP); Bodily Pain (BP); General Health (GH); Vitality (VT); Social Functioning (SF); Role-Emotional (RE); Mental Health (MH) as well as a reported Health Transition item (HT)
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in activity as measured by Physical Activity Scale for the Elderly (PASE)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
questionnaire is intended for use in an elderly population and focuses on 3 types of activities: leisure time activities, household activities and work-related activities.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in attention and executive functions as measured by Stroop Color-Word Test (SCWT)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
a word page with words printed in black ink, a color page with blocks printed in color, and a color-word page where the color and the word do not match.
The examinee reads the words or names the ink colors as quickly as possible within a time limit.
Measures selective attention and inhibitory control.
The total time in seconds was reported for each trial.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in state of mood as measured by the Profile of Mood State (POMS)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
A psychological distress scale to measure mood disturbance in 6 domains - fatigue-inertia, vigor-activity, tension-anxiety, depression-dejection, anger-hostility, and confusion-bewilderment.
Healthy populations take 3 to 7 minutes to complete, and others may take up a bit longer.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in learning and memory as measured by Controlled Oral Word Association Test (COWAT)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
Controlled Oral Word Association Test (COWAT): The examinee is required to say as many words as they can think of in one minute that begin with a given letter of the alphabet.
The task contains three trials.
Measures phonetic verbal fluency.
The raw score (total and mean words recorded across the three trials) was reported.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in learning and memory as measured by Auditory Verbal Learning Test (AVLT)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
Auditory Verbal Learning Test (AVLT): a verbal episodic memory test that evaluates a wide diversity of functions: short-term auditory-verbal memory, rate of learning, retention and recognition of information
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in attention and executive functions as measured by PASAT
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
a measure of cognitive function that assesses auditory information processing speed and flexibility, as well as calculation ability.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in attention and executive functions as measured by Trail Making Test (TMT)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
In Part A, the examinee is instructed to connect a set of 25 circles with numbers as quickly as possible while maintaining accuracy.
In Part B, the examinee is instructed to connect a set of 25 circles, alternating between numbers and letters, as quickly as possible while maintaining accuracy.
Measures attentional resources and is a measure of the frontal lobe "executive" functions of visual search, set-switching and mental flexibility.
The total time in seconds was reported for each measure.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in overall cognitive abilities as measured by Montreal Cognitive Assessment (MoCA)
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
assesses several cognitive domains and is used for the screening of mild cognitive impairment.
Total scores range from 0-30 with lower scores indicating decreased functioning.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Group differences in attention and executive functions as measured by Brief-A
時間枠：Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
a standardized self-report that captures views of an adult's executive functions or self-regulation in his or her everyday environment.
|
Postabsorptive state during 3 hours and change after feeding on study day 1 and the change from day 2 and day 3
|
|
Skeletal muscle strength
時間枠：on study day 1 and the change from day 2 and day 3
|
handgrip and kin-com 1-leg test
|
on study day 1 and the change from day 2 and day 3
|
|
24 hour diet recall
時間枠：on study day 1 and the change from day 2 and day 3
|
The subject is asked to recall in detail all the food and drink consumed during the 24 hours prior to the test day.
|
on study day 1 and the change from day 2 and day 3
|
|
Respiratory muscle strength
時間枠：on study day 1 and the change from day 2 and day 3
|
Maximum inhalation and exhalation pressure
|
on study day 1 and the change from day 2 and day 3
|
|
Body Composition
時間枠：on study day 1 and the change from day 2 and day 3
|
Body composition as measured by Dual-Energy X-ray Absorptiometry on study day 1 and the change from day 2 and day 3
|
on study day 1 and the change from day 2 and day 3
|
|
Gut function
時間枠：postabsorptive and prandial state every 20 minutes up to 6 hours before each sip feeding on day 1 and the change from day 2 and day 3
|
Digestion of the stable tracers of amino acid
|
postabsorptive and prandial state every 20 minutes up to 6 hours before each sip feeding on day 1 and the change from day 2 and day 3
|
協力者と研究者
スポンサー
捜査官
- 主任研究者：Marielle Engelen、Texas A&M University
出版物と役立つリンク
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (実際)
研究の完了 (実際)
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 (見積もり)
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
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。