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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01374711
Other study ID # NL36068.091.11 BI
Secondary ID
Status Completed
Phase N/A
First received May 19, 2011
Last updated June 26, 2013
Start date May 2011
Est. completion date November 2011

Study information

Verified date June 2013
Source Radboud University
Contact n/a
Is FDA regulated No
Health authority Netherlands: Medical Ethics Review Committee (METC)
Study type Interventional

Clinical Trial Summary

The human body knows a biphasic immunological reaction to sepsis. First, the pro-inflammatory reaction takes place, marked by the release of pro-inflammatory cytokines like TNF-α, as a reaction to the bacterial toxins. Secondly, the counter regulatory anti-inflammatory reaction arises. This phase is acting as negative feedback on the inflammation by inhibition of the pro-inflammatory cytokines. This is called "immunoparalysis", a pronounced immunosuppressive state, which renders patients vulnerable to opportunistic infections. Most of the septic patients survive the initial pro-inflammatory phase, but die during this second stage.Research in the past has shown that immunostimulatory therapy with GM-CSF or IFN-γ has promising effects on the pro-inflammatory reaction during immunoparalysis ex vivo. Both drugs are known for their immunostimulatory effects. Recent pilot studies have showed in septic patients, that long-lasting monocyte deactivation in sepsis ex vivo can be reversed by these two immunostimulants. However, the mechanism and extent of immunoparalysis recovery may be different between the two compounds. Previously it has been shown that human endotoxemia (induced by LPS), leads to marked immunosuppression in healthy individuals, characterized by a transient refractory state to a subsequent LPS challenge (endotoxin tolerance). Consequently, human endotoxemia can serve as a standardized, controlled model for sepsis-induced immunoparalysis. Until now, all studies have focused on the ex vivo tolerance. However, we have recently proved, that the ex vivo condition is not completely representative for the in vivo situation. Ex vivo, leukocyte tolerance to LPS resolves within one day, while the in vivo immunoparalysis persists for two weeks. In this project, we will investigate the effects of both GM-CSF and IFN-γ in a parallel double-blind placebo controlled randomized manner on the immunoparalysis following human endotoxemia, both in-vitro and in vivo. As a result, we hope to get more insight in the pathophysiology of sepsis-induced immunoparalysis and thereby develop new immunostimulatory therapies that improve patient outcome


Recruitment information / eligibility

Status Completed
Enrollment 18
Est. completion date November 2011
Est. primary completion date November 2011
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Male
Age group 18 Years to 35 Years
Eligibility Inclusion Criteria:

- Healthy male volunteers

Exclusion Criteria:

- seropositivity for markers of hepatitis B or HIV infection or medical history of any other obvious disease associated with immune deficiency

- Use of any medication or drugs

- a history of adverse reaction or hypersensitivity to GM-CSF/ IFN-?

- Smoking.

- Previous spontaneous vagal collapse.

- History, signs or symptoms of cardiovascular disease.

- (Family) history of myocardial infarction or stroke under the age of 65 years.

- Cardiac conduction abnormalities on the ECG consisting of a 2nd degree atrioventricular block or a complex bundle branch block.

- Hypertension (defined as RR systolic > 160 or RR diastolic > 90) or hypotension (defined as RR systolic < 100 or RR diastolic < 50).

- Renal impairment (defined as plasma creatinin >120 µmol/l).

- Liver enzyme abnormalities or positive hepatitis serology.

- Febrile illness during the week before the LPS challenge

- Participation in a drug trial or donation of blood 3 months prior to the LPS challenge.

- Chronic hiccups (defined as hiccups longer than 15 minutes in the past 6 months)

- Pre-existent muscle disease (congenital or acquired) or diseases / disorders know to be associated with myopathy including diabetes and auto-immune diseases.

- Pre-existent lung disease

- Upper airway / esophageal pathology

- Recent (< 1 month) nasal bleeding

- Phrenic nerve lesions

- Any metals in body (pacemaker, splinters, metal stitches)

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment


Intervention

Drug:
GM-CSF
GM-CSF (4microgram/kg/day subcutaneously) on days 2, 4 and 6.
IFN-Y
IFN-Y (100 microgram/day, subcutaneously) on days 2, 4 and 6.
Other:
E.coli endotoxin
2 ng/kg E.coli reference endotoxin 11:H 10:K negative intravenously

Locations

Country Name City State
Netherlands Radboud University Nijmegen Medical Centre Nijmegen Gelderland

Sponsors (1)

Lead Sponsor Collaborator
Radboud University

Country where clinical trial is conducted

Netherlands, 

Outcome

Type Measure Description Time frame Safety issue
Primary the effects of GM-CSF/IFN-? on the development of in vivo immunoparalysis induced by experimental human endotoxemia This will be determined by measuring plasma levels of various pro and anti-inflammatory cytokines and assessing the difference in the LPS-induced cytokine response between day 1 and 7 1 week (day 1- day 8) No
Secondary The effects of GM-CSF/IFN-? on the ex-vivo responsiveness of leukocytes to various inflammatory stimuli 1 week (day 1- day 8) No
Secondary the effects of GM-CSF/IFN-? on monocyte HLA-DR expression 1 week (day 1- day 8) No
Secondary the effects of GM-CSF/IFN-? on transcriptional pathways of leukocytes (qPCR and microarray) 1 week (day 1- day 8) No
Secondary the effects of GM-CSF/IFN-? on urine markers of tubular injury 1 week (day 1- day 8) No
Secondary The effect of LPS on twitch transdiaphragmatic pressure 1 day No
Secondary the effects of GM-CSF/IFN-? on clinical symptoms (illness score, mean arterial pressure, heart rate and temperature) 1 week (day 1- day 8) No
Secondary the effects of GM-CSF/IFN-? on changes in phenotype and gene expression caused by mechanisms other than changes in the underlying DNA sequence 1 week (day 1- day 8) No
Secondary Beta 2 Glycoprotein and platelet-monocyte interactions post-LPS 1 day No
Secondary Macrophage differentiation 1 day No
Secondary Immunosuppressive neutrophil populations 1 week (day 1- day 8) No
Secondary Blood viscosity 1 day No
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