Lactate Metabolism After an Endotoxin Challenge in Healthy Humans
Effects of an Acute Administration of Bacterial Endotoxin on Whole Body and Regional Lactate Metabolism in Healthy Male Volunteers
Sepsis is characterized by hyperlactatemia, the severity of which is proportionate with sepsis severity. The pathophysiological mechanisms (increased lactate production vs decreased lactate utilization; tissues involved in sepsis-induced lactate production) remain largely unknown.
In this study, the investigators will assess whole body and regional metabolism in healthy young male subjects on two occasions, once after administration of an intravenous bacterial endotoxin challenge, and once without intervention.
In one group of subjects, whole body lactate metabolism will be measured over 10 hours after the endotoxin challenge
- Energy expenditure and net substrate oxidation rates (indirect calorimetry)
- Lactate kinetics (measured by means of a continuous, exogenous sodium lactate infusion)
- Glucose kinetics (measured with 6,6 d2 glucose)
- Hemodynamic parameters and body temperature
- Blood clinical chemistry In one group of subjects, whole body lactate metabolism will be measured over 10 hours after the endotoxin challenge
- Energy expenditure and net substrate oxidation rates (indirect calorimetry)
- Lactate kinetics (measured by means of a continuous, exogenous sodium lactate infusion)
- Glucose kinetics (measured with 6,6 d2 glucose)
- Hemodynamic parameters and body temperature
- Blood clinical chemistry
In a second group of subjects, regional muscle lactate metabolism will be measured over 10 hours after the endotoxin challenge by means of muscle microdialysis
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
Vaud
-
Lausanne, Vaud, Schweiz, CH-1011
- Centre Hospitalier Universitaire Vaudois
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- gender male
- body mass index (BMI) < 25 kg/m2
- absence of known disease
Exclusion Criteria:
- any known pathology
- abnormal cardio-pulmonary and hemodynamic status
- electrocardiographic alterations
- history of allergy
- current medications
- drug abuse
- consumption of more than 20g/day alcohol
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: study 1a
whole body lactate production after bacterial endotoxin challenge
|
iv administration of 2ng/kg bacterial endotoxin
|
|
Ingen indgriben: study 1b
basal whole body lactate production
|
|
|
Eksperimentel: study 2a
muscle lactate concentration after bacterial endotoxin challenge
|
iv administration of 2ng/kg bacterial endotoxin
|
|
Ingen indgriben: study 2b
basal muscle lactate concentrations
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Whole body lactate production
Tidsramme: single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
Whole body lactate clearance will be measured by measuring the increase in blood lactate at steady state during a conrtinuous exogenous sodium lactate infusion. Lactate production will be calculated as the product of lactate clearance times per-infusion blood lactate concentration |
single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
|
skeletal muscle lactate concentration
Tidsramme: single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
interstitial muscle measured by means of in vivo microdialysis ; calculation of muscle-blood lactate gradient
|
single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
whole body energy expenditure
Tidsramme: single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
open circuit indirect calorimetry (hood)
|
single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
|
body temperature
Tidsramme: single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
single bacterial endotoxin administration; measurements over 6.5 hours following administration
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Samarbejdspartnere
Samarbejdspartnere
Efterforskere
Efterforskere
- Ledende efterforsker: René Chiolero, MD, Centre Hospitalier Universitaire Vaudois
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- Lsne-128/01
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