Denna sida har översatts automatiskt och översättningens korrekthet kan inte garanteras. Vänligen se engelsk version för en källtext.

Impact of INsulin Sensitivity on Cardiovascular Risk Markers During 10-20 Years of FOllow up (INFO)

20 september 2019 uppdaterad av: Tonje Amb Aksnes, Oslo University Hospital

Impact of INsulin Sensitivity on Cardiovascular Risk Markers During 10-20 Years of FOllow-up

The purpose of this study is to identify risk factors for insulin resistance and to investigate the influence of insulin sensitivity on development of cardiovascular risk markers like blood pressure, heart rate, body build (weight, BMI, waist-hip ratio, skinfold thickness), reduced insulin sensitivity, diabetes mellitus, dyslipidaemia, and sympathoadrenal activity or manifest cardiovascular disease among young men during 10-20 years.

Studieöversikt

Status

Avslutad

Betingelser

Detaljerad beskrivning

In 1988 Reaven described a syndrome designed "syndrome X" based on the clustering of resistance to insulin-stimulated glucose uptake, hyperinsulinaemia, hyperglycaemia, increased triglycerides, decreased high-density lipoprotein (HDL) cholesterol and high blood pressure and proposed insulin resistance as the common feature and the aetiology of the syndrome. Later obesity and the sympathetic nervous system have been proposed as pathogenic factors of the metabolic syndrome, and still major controversy exists regarding its precise aetiology and different definitions of metabolic syndrome are also discussed.

Insulin resistance is a growing epidemic concern in both industrialized and developing countries. It is one of the components of the metabolic syndrome, and plays an important role in the pathogenesis of type 2 diabetes. In view of the predicted increase in the number of diabetic patients during the coming decades, further information about risk factors and pathophysiology of diabetes are of utmost importance for early detection and possible prevention and early treatment from both a medical and a financial perspective. Our research group has for decades studied the pathophysiology of insulin resistance, hypertension, sympathoadrenal hyperreactivity and dyslipidaemia. We have also recently finished a long-term follow up study of subjects based on their cardiovascular and sympathetic responses to mental stress.

During 1991-2002 healthy young men recruited from the military enlistments in the Oslo/Akershus area were examined at Center of Cardiovascular and Renal Research, Division of Medicine, Oslo University Hospital, Ullevål. Young, healthy men, mean age of 21, were examined using the hyperinsulinaemic isoglycaemic glucose clamp technique, which is the gold standard to assess insulin sensitivity. The present study aims to re-examine these subjects in order to investigate the influence of insulin sensitivity on development of cardiovascular risk factors and diabetes. We therefore have a unique opportunity to perform a true, long-term follow-up study of a homogenous sample of subjects of same race and gender which may provide new insights into various pathophysiological mechanisms in diabetes and cardiovascular disease including elucidating the connections between insulin resistance, changes in parameters of body build, blood pressure and sympathetic over-activity. Clarifying these mechanisms are of direct importance for the entire population. There has to our knowledge not been any previous long-term follow-up on subjects based on their insulin resistance measured with this gold standard technique.

We now want to re-examine the same subject to investigate the influence of insulin sensitivity on development of cardiovascular risk factors like blood pressure, heart rate, body build (weight, BMI, waist-hip ration, skinfold thickness), reduced insulin sensitivity, diabetes mellitus, dyslipidaemia, and sympathoadrenal activity or manifest cardiovascular disease among young men during 10-20 years of follow-up.

Studietyp

Observationell

Inskrivning (Faktisk)

103

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

      • Oslo, Norge, 0407
        • Section of Cardiovascular and Renal Research

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

30 år till 40 år (Vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Manlig

Testmetod

Icke-sannolikhetsprov

Studera befolkning

103 men previously examined with hyperinsulinemic glucose clamp, measuring insulin sensitivity, at Center of Cardiovascular and Renal Research, Division of Medicine, Oslo University Hospital, Ullevål.

Beskrivning

Inclusion Criteria:

  • Completed hyperinsulinemic glucose clamp

Exclusion Criteria:

  • Missing agreement
  • No contact information

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Kohorter och interventioner

Grupp / Kohort
Longitudinal Insulin Sensitivity
The participants were examined using the hyperinsulinaemic isoglycaemic glucose clamp technique which is the gold standard to assess insulin sensitivity.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Exploring Insulin Sensitivity After 10-20 Years of Follow-up
Tidsram: One-day visit and the analyses will be done when all patients are examined in the period 2012-2013
The primary outcome is insulin sensitivity measured as the glucose disposal rate (GDR) (mg/kg/min), calculated from the average glucose infusion rate during the last 20 minutes of a 120 minutes hyperinsulinaemic isoglycaemic glucose clamp.
One-day visit and the analyses will be done when all patients are examined in the period 2012-2013
Exploring Insulin Sensitivity After 10-20 Years of Follow-up
Tidsram: 20 years
The primary outcome is insulin sensitivity measured as the glucose disposal rate (GDR) (mg/kg/min), calculated from the average glucose infusion rate during the last 20 minutes of a 120 minutes hyperinsulinaemic isoglycaemic glucose clamp.
20 years

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Sympathoadrenal Activity During Rest and Stress Tests
Tidsram: One-day visit and analyses will be done during 2012-2013
A mental arithmetic stress test will be announced and performed immediately after the glucose clamp, to assess the effects of increased adrenaline and noradrenaline when hepatic glucose production is suppressed by hyperinsulinaemia. Blood pressure, heart rate and catecholamine blood-levels are measured at pre-defined intervals.
One-day visit and analyses will be done during 2012-2013
Echocardiography
Tidsram: One-day visit, final analyses 2012-2013
Transthoracic echocardiography will be performed using a VIVID E9 (or VIVID 7) echocardiographic scanner (GE Vingmed, Horten) with 1,7-MHz probe in second harmonic mode and optimal gain and contrast.Left ventricular (LV) internal dimension, intraventricular septal thickness and LV posterior wall thickness will be measured as well as epicardial adipose tissue. We will also evaluate biplane Simpson ejection fraction and valvular incompetence
One-day visit, final analyses 2012-2013
Ultrasound Abdomen
Tidsram: One-day visit. Final analyses of the whole cohort during 2012-2013
Ultrasound quantification of abdominal adipose tissue
One-day visit. Final analyses of the whole cohort during 2012-2013

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Utredare

  • Studierektor: Sverre E Kjeldsen, PhD, Oslo Univeristy Hospital

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 augusti 2011

Primärt slutförande (Faktisk)

1 mars 2014

Avslutad studie (Faktisk)

1 mars 2015

Studieregistreringsdatum

Först inskickad

22 juli 2011

Först inskickad som uppfyllde QC-kriterierna

8 augusti 2011

Första postat (Uppskatta)

9 augusti 2011

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

10 oktober 2019

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

20 september 2019

Senast verifierad

1 september 2019

Mer information

Termer relaterade till denna studie

Andra studie-ID-nummer

  • 2010/3339

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .