- ICH GCP
- Реестр клинических исследований США
- Клиническое испытание NCT01860599
Effects of Aerobic Exercise in Patients With Pre-diabetes
The Effect of Controlled Aerobic Exercise on Endothelial Dysfunction and Vascular Reactivity in Patients With Pre-diabetes: A Crossover Pilot Study
Обзор исследования
Статус
Условия
Вмешательство/лечение
Подробное описание
- To refine a non-invasive test for endothelial dysfunction. The investigators will examine the flow response to sheer-stress induced by the relief of pressure exerted with a blood pressure cuff on the brachial artery, measuring flow responses with Doppler. This is a measure of local nitric oxide production from endothelial cells which is known to be impaired in diabetics, normal in non-diabetics, but unknown in prediabetics.
- To measure in the same individuals indicators of glucose metabolism abnormalities including fasting blood glucose, HbA1C, insulin sensitivity by homeostasis model assessment-estimated insulin resistance (HOMA-IR) and insulin levels.
- To measure Endothelial Progenitor Cell (EPC) count, viability, gene expression of key genes such as endothelial nitric oxide synthase (eNOS), von-Willebrand's Factor (vWF) and adhesion molecules such platelet-endothelial cell adhesion molecule-1 (PECAM-1 or CD31), cadherin such as Vascular-Endothelial cadherin (VE-cadherin)or CD (cell surface marker)-144, growth factors such as vascular-endothelial growth factor (VEGF)and Insulin like growth factor (IGF-1)in the EPCs from pre-diabetes subjects pre and post exercise.
- Correlate the glucose metabolism abnormalities with potential causative factors of endothelial dysfunction by studying EPC functions such as migration and tube formation and susceptibility to apoptosis in moderate hyperglycemia. Apoptosis assay will be done by Flow Cytometry analysis using Annexin V- Propidium-iodide dye.
- Subjects will be randomized to the intervention (structured exercise) or continuation of their usual life style (non-exercise, sedentary)group.
In both arms of the study, subjects will be encouraged to adhere to the standard dietary advice that all pre-diabetic patients receive as part of their standards of care, irrespective of design arm they will be in.
The investigators expect exercise to improve flow-mediated vasodilatation, EPC colony count and function, along with better key gene expressions noted by Real Time-qualitative polymerase chain reaction (PCR).
- Assess the effects of the intervention comparing them to the findings in each individual, in a paired manner.
- After a washout period, individuals will be crossed over to see whether the effects of the intervention are reversed and to demonstrate that the difference between controls and intervention subjects was due to the aerobic exercise intervention, and not due to random differences
Тип исследования
Регистрация (Ожидаемый)
Фаза
- Непригодный
Контакты и местонахождение
Места учебы
-
-
Massachusetts
-
Springfield, Massachusetts, Соединенные Штаты, 01199
- Baystate Medical Center
-
-
Критерии участия
Критерии приемлемости
Возраст, подходящий для обучения
Принимает здоровых добровольцев
Полы, имеющие право на обучение
Описание
Inclusion Criteria:
Prediabetic
- Impaired fasting glucose (100-125mg/dl)
- Impaired glucose tolerance (2' post between 140-199mg/dl)
- HbA1C 5.7-6.4 mg/d (inclusive)
- Exercise Naive
- BMI between 20-39.9
- Nutritional Counseling prior to participation with CDE/RD
- Willing to wear activity monitor
- Willing to keep a dietary log
Exclusion Criteria:
- Pace maker or other implanted device that might have interference with Tanita scale
- Any contraindication to moderate exercise
- Previous coronary disease or cerebrovascular event active or clinically significant coronary vascular disease, or peripheral vascular disease
- Diabetes
- Uncontrolled hypertension (SBP > 140 or DBP > 90 on 3 separate occasions) ACE's or ARB's
- Premature familial CAD (Father < 55years____ Mother <65years)
- HDL < 40mg/dl
- Triglycerides >400mg/dl
- Any new lipid lowering medication started in the past 6 months
Framingham Risk Score two or more
- Smoking
- Hypertension (B/P > 140/90 or on antihypertensives)
- HDL < 40mg/dl
- Age men >45years or women >55years
- Low hematocrit ( or hemoglobinopathies that may impair exercise tolerance) or abnormal CBC
- Uncontrolled hypo/hyperthyroidism
- Active smoking
- Liver disease ( alt or AST> 2.5's UNL)
- Moderate or Severe Kidney disease, current or history
- Pancreatitis, current or history
- Any medication started in the last 3 months
- Active non healing wounds
- Recent Surgery in the last 3 months
- Anti-inflammatory disease, current or history
- Regular use of anti-inflammatory drugs
- CA
- Alcoholism
- Women who are pregnant or intending to become pregnant
- Oral or Injectable antidiabetic medication
- Post menopausal women on hormone replacement
- Any steroid medication (oral, inhaled, injected or nasal)
Учебный план
Как устроено исследование?
Детали дизайна
- Основная цель: Профилактика
- Распределение: Рандомизированный
- Интервенционная модель: Назначение кроссовера
- Маскировка: Одинокий
Оружие и интервенции
Группа участников / Армия |
Вмешательство/лечение |
|---|---|
|
Другой: Prediabetes with exercise
150 minutes of moderate exercise per week
|
150 minutes of moderate exercise per week
|
|
Другой: Prediabetes without exercise
Pre-study activity level (i.e.
no exercise)
|
Pre-study activity level (i.e.
no exercise)
|
Что измеряет исследование?
Первичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
|
Measures of Endothelial Function by studying number, function and gene expression of endothelial progenitor cells (identified as CD34+ cells)
Временное ограничение: 16 weeks per patient
|
A. Number of viable CD34 +ve cells at Day-0 and viability assay.
B. Colony Formation count assay at Day-5, pre and post exercise.
C. We will test CD34+ cell migration, adhesion and tube formation properties.
D. Gene expression in CD34+ cells of critical endothelial function and inflammatory genes will be measured: eNOS, vWF and PECAM1, VE-cadherin, VEGF-A, Superoxide dismutase (SOD)-1, 2 and 3, Catalase, Interleukin (IL)-6, Tumor Necrosis Factor (TNF alpha), P53, P21, PUMA, Bcl2 [Apoptosis genes] will also be noted
|
16 weeks per patient
|
Вторичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
|
Measures of Vacular Reactivity
Временное ограничение: 16 weeks
|
A) Measure Brachial reactivity through shear-stress using flow mediated dilatation (FMD) B).
Measure Arterial Stiffness measure pre and post exercise.
C) Measure Carotid Intima Media Thickness will be measured at each time point
|
16 weeks
|
Другие показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
|
Measures of Insulin Sensitivity by measuring inflammatory molecules as a surrogate of insulin resistance
Временное ограничение: 16 weeks
|
We will measure: A. plasma measurements of cytokines, including C - reactive protein, E-selectin, IL-6, IL-10, thrombin, leptin, adiponectin, fasting glucose, fasting insulin and fasting lipid profile from subjects are expected to reflect endothelial inflammation. B. Insulin sensitivity will be evaluated at baseline and weeks 6, 10 and16 using the HOMA ratio, calculated from individual serum measures (fasting glucose* insulin/405) C.Adiposity will be measured at baseline and at weeks 6, 10, and 16 using the Tanita Body Composition Analyzer scale, measured as percentage body fat D. Resting energy expenditure as measures of indirect calorimetry for basal metabolic rate measures (BMR). |
16 weeks
|
Соавторы и исследователи
Спонсор
Следователи
- Главный следователь: Sabyasachi Sen, MD, PhD, Baystate Medical Center
Даты записи исследования
Изучение основных дат
Начало исследования
Первичное завершение (Действительный)
Завершение исследования (Действительный)
Даты регистрации исследования
Первый отправленный
Впервые представлено, что соответствует критериям контроля качества
Первый опубликованный (Оценивать)
Обновления учебных записей
Последнее опубликованное обновление (Оценивать)
Последнее отправленное обновление, отвечающее критериям контроля качества
Последняя проверка
Дополнительная информация
Термины, связанные с этим исследованием
Ключевые слова
Дополнительные соответствующие термины MeSH
Другие идентификационные номера исследования
- IRB132171
Эта информация была получена непосредственно с веб-сайта clinicaltrials.gov без каких-либо изменений. Если у вас есть запросы на изменение, удаление или обновление сведений об исследовании, обращайтесь по адресу register@clinicaltrials.gov. Как только изменение будет реализовано на clinicaltrials.gov, оно будет автоматически обновлено и на нашем веб-сайте. .