Ignite Creation Date:
2025-12-25 @ 12:13 AM
Ignite Modification Date:
2025-12-25 @ 10:15 PM
Study NCT ID:
NCT01452958
Status:
COMPLETED
Last Update Posted:
2013-01-30
First Post:
2011-09-22
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
Endotoxin & Cytokines. Do Protein Loss and Metabolic Effects Depend on Central Nervous System (CNS) Activation of Stress Hormones or on Local Mechanisms in Muscle and Fat?
Sponsor:
Aarhus University Hospital
Organization:
Study Overview
Official Title:
Endotoxin & Cytokines. Do Protein Loss and Metabolic Effects Depend on CNS Activation of Stress Hormones or on Local Mechanisms in Muscle and Fat?
Status:
COMPLETED
Status Verified Date:
2013-01
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Main objective :
The purpose of this study is to prove that the effects of bacterial endotoxin and cytokine TNF-α, on protein loss, fatty acid release, and glucose metabolism depend on two mechanisms:
1. Direct local effects in muscle tissue.
2. Activation of the hypothalamo-pituitary axis and a stress-hormone response
Study protocols:
1. Acute metabolic effects of TNF-α(Beromun, Boehringer-Ingelheim Germany) vs placebo perfused into the femoral artery of the leg in 8 healthy subjects.
2. Acute metabolic effects of
* placebo(saline)
* endotoxin(US standard reference E.Coli, endotoxin)
* TNF-α(Beromun, Boehringer-Ingelheim Germany) given systemically
* in 8 patients with hypopituitarism(to block stress hormone release) and in 8 healthy subjects all studied thrice.
The purpose of this study is to prove that the effects of bacterial endotoxin and cytokine TNF-α, on protein loss, fatty acid release, and glucose metabolism depend on two mechanisms:
1. Direct local effects in muscle tissue.
2. Activation of the hypothalamo-pituitary axis and a stress-hormone response
Study protocols:
1. Acute metabolic effects of TNF-α(Beromun, Boehringer-Ingelheim Germany) vs placebo perfused into the femoral artery of the leg in 8 healthy subjects.
2. Acute metabolic effects of
* placebo(saline)
* endotoxin(US standard reference E.Coli, endotoxin)
* TNF-α(Beromun, Boehringer-Ingelheim Germany) given systemically
* in 8 patients with hypopituitarism(to block stress hormone release) and in 8 healthy subjects all studied thrice.
Detailed Description:
PURPOSE:
Knowledge about the effects of bacterial endotoxin and cytokines (and inflammation in general) in humans on protein, glucose and lipid metabolism and intracellular signalling in muscle and fat is sporadic and it is uncertain whether endotoxin and cytokines act directly in fat and muscle tissue or indirectly via central nervous system (CNS) mediated stress hormone release.
The investigators hypothesize that the metabolic effects of endotoxin and cytokine TNF-α, including protein loss, fatty acid release and decreased glucose uptake depend on two mechanisms:
1. Direct local effects in muscle tissue (Study protocol 1)
2. Activation of the hypothalamo-pituitary axis and generalized stress hormone response (Study protocol 2)
METHODOLOGY:
Study protocol 1:
Acute metabolic effects of TNF-α (Beromun, Boehringer-Ingelheim, Germany) versus placebo perfused into the femoral artery of the leg in 8 healthy subjects, studied once. Femoral vein sampling allows assessment of local metabolic events in the leg. The vessels were cannulated using the Seldinger technique. Each study comprises a 3 hour basal period and a 3 hour Hyperinsulinemic-Euglycemic Clamp. Muscle biopsies were obtained simultaneously from both lateral vastus muscles.
Study protocol 2:
Acute metabolic effects of (i)placebo (saline), (ii)endotoxin (US standard reference E.Coli, endotoxin) and (iii)TNF-α (Beromun, Boehringer-Ingelheim, Germany) given systemically intravenously (i.v.) in 8 patients with hypopituitarism (to block stress hormone release) and in 8 healthy subjects all studied thrice. Every study comprises a 4 hour basal period and a 2 hour Hyperinsulinemic-Euglycemic Clamp. Muscle and fat biopsies were obtained.
Study protocol 1 and Study protocol 2:
Assays: Mass spectrometry (15N-phenylalanine, 13C-urea), 3H-glucose, 3H-palmitate quantification, hormone and metabolite analysis, cytokine assays, intracellular signaling.
Knowledge about the effects of bacterial endotoxin and cytokines (and inflammation in general) in humans on protein, glucose and lipid metabolism and intracellular signalling in muscle and fat is sporadic and it is uncertain whether endotoxin and cytokines act directly in fat and muscle tissue or indirectly via central nervous system (CNS) mediated stress hormone release.
The investigators hypothesize that the metabolic effects of endotoxin and cytokine TNF-α, including protein loss, fatty acid release and decreased glucose uptake depend on two mechanisms:
1. Direct local effects in muscle tissue (Study protocol 1)
2. Activation of the hypothalamo-pituitary axis and generalized stress hormone response (Study protocol 2)
METHODOLOGY:
Study protocol 1:
Acute metabolic effects of TNF-α (Beromun, Boehringer-Ingelheim, Germany) versus placebo perfused into the femoral artery of the leg in 8 healthy subjects, studied once. Femoral vein sampling allows assessment of local metabolic events in the leg. The vessels were cannulated using the Seldinger technique. Each study comprises a 3 hour basal period and a 3 hour Hyperinsulinemic-Euglycemic Clamp. Muscle biopsies were obtained simultaneously from both lateral vastus muscles.
Study protocol 2:
Acute metabolic effects of (i)placebo (saline), (ii)endotoxin (US standard reference E.Coli, endotoxin) and (iii)TNF-α (Beromun, Boehringer-Ingelheim, Germany) given systemically intravenously (i.v.) in 8 patients with hypopituitarism (to block stress hormone release) and in 8 healthy subjects all studied thrice. Every study comprises a 4 hour basal period and a 2 hour Hyperinsulinemic-Euglycemic Clamp. Muscle and fat biopsies were obtained.
Study protocol 1 and Study protocol 2:
Assays: Mass spectrometry (15N-phenylalanine, 13C-urea), 3H-glucose, 3H-palmitate quantification, hormone and metabolite analysis, cytokine assays, intracellular signaling.
Study Oversight
Has Oversight DMC:
True
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: