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Mechanisms of Insulin Resistance in Critical Illness: Role of Systemic Inflammation and GLP-1

19. september 2014 oppdatert av: Kirsten Moller, Rigshospitalet, Denmark
The purpose of this study is to determine the role of inflammation and the insulin regulating hormone GLP-1 during critical illness.

Studieoversikt

Detaljert beskrivelse

Critically ill patients often exhibit hyperglycaemia. Although the cause of this hyperglycaemia is probably multifactorial, peripheral insulin resistance is a major contributor, similar to type 2 diabetes mellitus (T2D). There are several similarities between critical illness and T2D, including the presence of systemic inflammation and increased plasma free fatty acids (FFA), all of which may induce insulin resistance in healthy volunteers. In critical illness, elevated catecholamines, cortisol, growth hormone and glucagon may also contribute to insulin resistance.

The degree of hyperglycaemia correlates with mortality in ICU patients. van den Berghe et al. found that IV infusion of insulin to obtain strict normoglycaemia reduced mortality as well as morbidity in critically ill surgical patients and in some medical ICU patients.

However, insulin increases the risk of hypoglycaemia; this is a major obstacle to strict euglycaemia in ICU patients and may explain the inability of others to reproduce the benefits reported by van den Berghe et al. Thus, alternatives to insulin for controlling plasma glucose (PG) in ICU patients are warranted.

Aim:

To study the role of the incretin hormone, glucagon-like peptide (GLP)-1 for glycaemic, metabolic, hormonal and inflammatory profile in

  • critically ill patients in the intensive care unit (ICU) and
  • healthy volunteers exposed to a standardised systemic inflammation

Studietype

Intervensjonell

Registrering (Faktiske)

40

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

      • Copenhagen, Danmark, 2100
        • Centre of Inflammation and Metabolism - Rigshospitalet 7641
      • Copenhagen, Danmark, 2400
        • University of Copenhagen

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 40 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Mann

Beskrivelse

Inclusion Criteria healthy subjects:

  • Healthy (assessed by medical history and clinical examination)
  • Age 18-40years
  • BMI < 30kg/m2

Exclusion Criteria healthy subjects:

  • Previous resection of the small intestine (not including the appendix)
  • presence of any inflammatory illness during the fortnight preceding the study

Inclusion Criteria critically ill patients:

  • Age>18 years
  • HbA1C<6,5%
  • Admission to the ICU within the last 72 hours

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Placebo komparator: 2C - 1
TNF and OGTT and saline
Normal saline (NaCl 0,9%)
1000ng/m2 BSA/hour i.v. infusion for 4-6 hours
Oral glucose tolerance test with 75 g glucose
Aktiv komparator: 2C - 2
TNF and OGTT and GLP-1
1000ng/m2 BSA/hour i.v. infusion for 4-6 hours
Oral glucose tolerance test with 75 g glucose
GLP-1 1,2pmol/kg/min i.v. infusion for 4 hours
Placebo komparator: 2C - 3
TNF and IVGTT and saline
Normal saline (NaCl 0,9%)
1000ng/m2 BSA/hour i.v. infusion for 4-6 hours
Intravenous glucose tolerance test with infusion of 20% glucose matching the glucose profile of the corresponding OGTT
Aktiv komparator: 2C - 4
TNF and IVGTT and GLP-1
1000ng/m2 BSA/hour i.v. infusion for 4-6 hours
GLP-1 1,2pmol/kg/min i.v. infusion for 4 hours
Intravenous glucose tolerance test with infusion of 20% glucose matching the glucose profile of the corresponding OGTT
Placebo komparator: 2A-1
Saline infusion and OGTT
Normal saline (NaCl 0,9%)
Oral glucose tolerance test with 75 g glucose
Placebo komparator: 2A-2
Saline and IVGTT
Normal saline (NaCl 0,9%)
Intravenous glucose tolerance test with infusion of 20% glucose matching the glucose profile of the corresponding OGTT
Aktiv komparator: 2A-3
TNF and OGTT
1000ng/m2 BSA/hour i.v. infusion for 4-6 hours
Oral glucose tolerance test with 75 g glucose
Aktiv komparator: 2A-4
TNF and IVGTT
1000ng/m2 BSA/hour i.v. infusion for 4-6 hours
Intravenous glucose tolerance test with infusion of 20% glucose matching the glucose profile of the corresponding OGTT
Eksperimentell: 1C
OGTT and corresponding IVGTT
Oral glucose tolerance test with 75 g glucose
Intravenous glucose tolerance test with infusion of 20% glucose matching the glucose profile of the corresponding OGTT

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Substudy 2C (12 Healthy volunteers): GLP-1
Tidsramme: 6 weeks after intervention
Increased plasma insulin and C-peptide (intact insulinotropic effect of GLP-1) during GLP-1 infusion in healthy volunteers.
6 weeks after intervention
Substudy 2A (12 Healthy volunteers): Insulin, C-peptide and incretin hormone response
Tidsramme: 6 weeks after intervention
Insulin, c-peptide and incretin hormone response to glucose stimulation during standardized systemic inflammation (TNF infusion) compared to placebo (saline infusion)
6 weeks after intervention
Substudy 1C(8 patients, 8 healthy controls): Insulin, C-peptide and incretin hormone response
Tidsramme: 6 weeks after intervention
Insulin, c-peptide and incretin hormone response to glucose stimulation during IVGTT compared to OGTT in critically ill patients admitted to the ICU
6 weeks after intervention

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Substudy 2C (12 Healthy volunteers): Clamp
Tidsramme: 6 weeks after intervention
Enhanced insulin response (AUC) and reduced difference between the AUC obtained during OGTT and IGGTT (reduced endogenous incretin effect) during an isoglycaemic intravenous glucose tolerance test (IVGTT) in healthy volunteers receiving TNF-infusion.
6 weeks after intervention
Substudy 2A (12 Healthy volunteers): The incretin effect
Tidsramme: 6 weeks after intervention
The difference between the plasma insulin AUC obtained during OGTT and IVGTT (endogenous incretin effect).
6 weeks after intervention
Substudy 1C (8 patients, 8 healthy controls): The incretin effect
Tidsramme: 6 weeks after intervention
The difference between the plasma insulin AUC obtained during OGTT and IVGTT (endogenous incretin effect)in non-diabetic critically ill patients admitted to the ICU.
6 weeks after intervention

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Etterforskere

  • Hovedetterforsker: Kirsten Møller, MD, Ph.D., DMSc, Centre of Inflammation and Metabolism

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. mars 2011

Primær fullføring (Faktiske)

1. september 2014

Studiet fullført (Faktiske)

1. september 2014

Datoer for studieregistrering

Først innsendt

2. mai 2011

Først innsendt som oppfylte QC-kriteriene

3. mai 2011

Først lagt ut (Anslag)

4. mai 2011

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

22. september 2014

Siste oppdatering sendt inn som oppfylte QC-kriteriene

19. september 2014

Sist bekreftet

1. september 2014

Mer informasjon

Begreper knyttet til denne studien

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