Exercise and Inflammation in the Elderly (IRIS)
29. marts 2018 opdateret af: VA Office of Research and Development
Exercise, Inflammation and Pro-thrombotic Modulators in the Elderly
Persistent low-grade inflammation and impaired fibrinolysis, are independent predictors of several chronic diseases highly prevalent in the older Veteran population including cardiovascular disease (CVD), stroke, and diabetes.
Inflammation is likely to be a causative underlying mechanism of insulin resistance.
Lifestyle changes such as weight loss and physical activity are advocated for the treatment of these chronic diseases and endpoints, and data are emerging which suggest that these treatments may be beneficial, in part, due to their anti-inflammatory effects.
Identification of effective therapies that reduce chronic inflammation for Veterans is important given the widespread adverse health effects of a chronically elevated inflammatory state.
Studieoversigt
Status
Afsluttet
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
This study will compare the effects of 6 month trial of aerobic exercise (AEX) vs. weight loss (WL) in older individuals on:
- adipokine secretion and expression (tumor necrosis factor alpha, adiponectin);
- adipose tissue and skeletal muscle inflammatory proximal receptor expression (adiponectin and tumor necrosis factor alpha expression) and signaling pathways; and
- whether the changes in signal transduction are associated with changes in peripheral whole body insulin sensitivity by a hyperinsulinemic-euglycemic clamp.
The prevention and treatment of insulin resistance, the metabolic syndrome, and their CVD complications through exercise and weight loss could improve Veterans' health and reduce health care costs. Knowledge of their effectiveness has important implications for the cardiovascular health of Veterans given the widespread adverse health effects of chronic inflammation on vascular biology, skeletal muscle function and insulin action.
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
119
Fase
- Ikke anvendelig
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
-
-
Maryland
-
Baltimore, Maryland, Forenede Stater, 21201
- Baltimore VA Medical Center VA Maryland Health Care System, Baltimore, MD
-
-
Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
45 år til 80 år (Voksen, Ældre voksen)
Tager imod sunde frivillige
Ingen
Køn, der er berettiget til at studere
Alle
Beskrivelse
Inclusion Criteria:
- Male and Female
- 45-80 yrs of age
- Non-smoking for one year
- Body mass index greater than 20 kg/m2 and less than 50 kg/m2
- Menopause over 1 year
Exclusion Criteria:
- Symptomatic heart disease, coronary artery disease, congestive heart failure, or uncontrolled hypertension (blood pressure over 180/100 mm Hg) unless medically stabilized
- Currently being treated for active cancer
- Type 1 diabetes; Insulin or oral agent treatment for diabetes, poorly controlled diabetes fasting blood glucose over 160 mg/dl
- Allergic to lidocaine
- Untreated dyslipidemia with National Cholesterol Adult Treatment Panel III 10 year cardiac risk score greater than 10%, or receiving triglyceride lowering meds
- Other systemic disorders that are not medically treated and stable
- Taking beta-blockers, oral steroids, warfarin or any other medications interfering with fat/muscle metabolism that may not be safely discontinued temporarily for specific procedures (ie for 72 hours prior)
- Abnormal response to exercise test (ST segment depression greater than 2mm, chest pain, significant arrhythmias, extreme shortness of breath, cyanosis, exercising BP above 240/120mm Hg, or other contraindications to exercise) *requires follow up treatment w/ primary MD for continued participation in study
- Abnormal liver function
- Abnormal renal function
- Chronic pulmonary disease
- Anemia hematocrit below 35 mg/dl, platelets below 100,000/cm3
- Mini-mental state exam below 24, dementia or unstable clinical depression by exam
- Aerobically trained with maximal oxygen consumption greater than 2 standard deviations above age-adjusted mean
- Exercise group only: History of cerebrovascular disease (by medical history) with symptoms limiting the ability to exercise
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Ikke-randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Eksperimentel: Arm 1
6 months of aerobic exercise training
|
6 months of aerobic exercise training
|
|
Eksperimentel: Arm 2
6 months of weight loss
|
6 months of weight loss
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Insulin Sensitivity
Tidsramme: Baseline and 6 month
|
Insulin resistance is defined as a reduction in glucose utilization rate elicited by a given insulin concentration.
Glucose utilization is measured during a three hour hyperinsulinemic-euglycemic clamp and is presented as a measure of insulin sensitivity.
This is one of the most sophisticated methods to measure insulin sensitivity.
|
Baseline and 6 month
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Body Weight
Tidsramme: Baseline and 6 month
|
Baseline and 6 month
|
|
|
Fitness
Tidsramme: Baseline and 6 month
|
Maximal oxygen consumption (VO2max) on a treadmill
|
Baseline and 6 month
|
Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Efterforskere
- Ledende efterforsker: Alice S Ryan, PhD, Baltimore VA Medical Center VA Maryland Health Care System, Baltimore, MD
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart (Faktiske)
1. april 2007
Primær færdiggørelse (Faktiske)
29. november 2012
Studieafslutning (Faktiske)
29. november 2012
Datoer for studieregistrering
Først indsendt
12. september 2008
Først indsendt, der opfyldte QC-kriterier
12. september 2008
Først opslået (Skøn)
16. september 2008
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
26. juni 2018
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
29. marts 2018
Sidst verificeret
1. marts 2018
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- AGCG-003-05F
Plan for individuelle deltagerdata (IPD)
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