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Immune Modulation by Ischemic Pre-conditioning in Healthy Individuals: Intracellular Signalling in Regulatory Cells (KONDI-immun)

Primary Purpose

Ischemia Reperfusion Injury, Ischaemia Reperfusion Injury

Status
Completed
Phase
Not Applicable
Locations
Denmark
Study Type
Interventional
Intervention
Single Cuff Tourniquet 8000
Sponsored by
University of Aarhus
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional basic science trial for Ischemia Reperfusion Injury

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)MaleAccepts Healthy Volunteers

Inclusion Criteria:

  • Healthy and well

Exclusion Criteria:

  • Smoker.
  • Taking regular medication.
  • Any acute, chronic or systemic disease
  • No hard physical exercise 72 hours prior to study participation.
  • No alcohol or caffein-containing drinks 24 hours prior to study participation.
  • Fasted for at least 6 hours prior to study participation.

Sites / Locations

  • C-Laboratorium, Skejby Sygehus

Arms of the Study

Arm 1

Arm 2

Arm Type

Active Comparator

Experimental

Arm Label

non-ischemic preconditioning

ischemic preconditioning

Arm Description

The participants will have the cuff attached to the arm, however not be inflated for the 4 cycles of remote ischemic conditioning: 1 cycle is 5 minutes of inflation followed by 5 minutes of deflation. The ischemic reperfusion injury was induced by cuff inflation by the Single Cuff Tourniquet 8000 to 200 mmHg in the arm for 20 minutes followed by reperfusion for 15 minutes.

The blood supply to the distal part of the arm will be occluded by inflation of a single cuff to 200mmHg, by the help of the Single Cuff Tourniquet 8000, for 5 minutes separated from 5 minutes of deflation, a cycle that happens 4 times in total. The ischemic reperfusion injury was induced by cuff inflation to 200 mmHg in the arm for 20 minutes followed by reperfusion for 15 minutes.

Outcomes

Primary Outcome Measures

Changes in the amount of immune cells in the peripheral blood
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Changes in inflammatory cytokines in the peripheral blood
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Changes in intracellular activation markers in T-cells
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Changes in intracellular activation markers in monocytes
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.

Secondary Outcome Measures

Measure pulse variability.
Pulse variability was measured during the experiment.
Measure blood pressure.
Blood pressure was measured during the experiment.

Full Information

First Posted
June 15, 2016
Last Updated
March 20, 2019
Sponsor
University of Aarhus
Collaborators
Fonden til Lægevidenskabens Fremme, Erasmus Medical Center
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1. Study Identification

Unique Protocol Identification Number
NCT03541239
Brief Title
Immune Modulation by Ischemic Pre-conditioning in Healthy Individuals: Intracellular Signalling in Regulatory Cells
Acronym
KONDI-immun
Official Title
Immune Modulation by Ischemic Pre-conditioning in Healthy Individuals: Intracellular Signalling in Regulatory Cells
Study Type
Interventional

2. Study Status

Record Verification Date
June 2016
Overall Recruitment Status
Completed
Study Start Date
March 31, 2016 (Actual)
Primary Completion Date
July 19, 2016 (Actual)
Study Completion Date
July 19, 2016 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
University of Aarhus
Collaborators
Fonden til Lægevidenskabens Fremme, Erasmus Medical Center

4. Oversight

Data Monitoring Committee
Yes

5. Study Description

Brief Summary
The aim of the study is to investigate how phosphorylation of STAT3, p38 mitogen-activated protein kinase (MAPK), extracellular signal-regulated kinase (ERK) and protein kinase B (AKT) reacts to remote ischemic conditioning (rIC) in healthy humans, which could point to mechanisms by which rIC may protect against ischemia-reperfusion injury (IRI), and if rIC affects immune reactivity.
Detailed Description
In rIC brief episodes of non-lethal ischemia and reperfusion in one vascular bed, tissue or organ, has shown to have protective effects against IRI in various organs. The protective effect of rIC seems convincing, but to date it is not clear which mechanisms give rIC its effects, and why effects are absent in some situations. Effects of rIC on the immune system are also not clear, but important if rIC is used in transplantation and autoimmunity settings, and also in regards to infection risk. Patients studied have often been given medical treatment and/or have comorbidities affecting the results. This project will measure how intracellular phosphorylation of STAT3, p38 MAPK, ERK and AKT, inflammatory cell patterns and cytokine production react to rIC in healthy humans, and potentially give a better understanding of the mechanisms that mediate the protective effects of rIC. The intracellular mediators studied are involved in the initiation of cytokine production and regulate apoptosis and activation of the inflammatory cells. An altered balance between leucocytes and their mediators could be of importance for rIC effects, particularly in transplantation and autoimmunity, and this will be elucidated in our study. As a secondary end point the investigators will measure the effect of rIC on pulse variability and blood pressure using a non-invasive device, since evidence regarding these aspects is sparse, although documented positive effects of rIC have primarily been on the heart and vascular system.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Ischemia Reperfusion Injury, Ischaemia Reperfusion Injury

7. Study Design

Primary Purpose
Basic Science
Study Phase
Not Applicable
Interventional Study Model
Crossover Assignment
Masking
Investigator
Allocation
Randomized
Enrollment
19 (Actual)

8. Arms, Groups, and Interventions

Arm Title
non-ischemic preconditioning
Arm Type
Active Comparator
Arm Description
The participants will have the cuff attached to the arm, however not be inflated for the 4 cycles of remote ischemic conditioning: 1 cycle is 5 minutes of inflation followed by 5 minutes of deflation. The ischemic reperfusion injury was induced by cuff inflation by the Single Cuff Tourniquet 8000 to 200 mmHg in the arm for 20 minutes followed by reperfusion for 15 minutes.
Arm Title
ischemic preconditioning
Arm Type
Experimental
Arm Description
The blood supply to the distal part of the arm will be occluded by inflation of a single cuff to 200mmHg, by the help of the Single Cuff Tourniquet 8000, for 5 minutes separated from 5 minutes of deflation, a cycle that happens 4 times in total. The ischemic reperfusion injury was induced by cuff inflation to 200 mmHg in the arm for 20 minutes followed by reperfusion for 15 minutes.
Intervention Type
Device
Intervention Name(s)
Single Cuff Tourniquet 8000
Other Intervention Name(s)
20-54-711, 20-54-712
Intervention Description
If randomized to ischemic conditioning the cuff will be inflated as stated before. If randomized to non-ischemic conditioning the cuff will not be inflated.
Primary Outcome Measure Information:
Title
Changes in the amount of immune cells in the peripheral blood
Description
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Time Frame
Baseline before any intervention, 0 minutes and 85 minutes after IRI and 24 hours after IRI
Title
Changes in inflammatory cytokines in the peripheral blood
Description
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Time Frame
Baseline before any intervention, 85 minutes after IRI and 24 hours after IRI
Title
Changes in intracellular activation markers in T-cells
Description
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Time Frame
Baseline before any intervention, 0 minutes and 85 mins after IRI and 24 hours after IRI
Title
Changes in intracellular activation markers in monocytes
Description
The investigators measured the effect of ischemic preconditioning on ischemia reperfusion injury in a randomised controlled cross-over trial with healthy participants. Peripheral blood before and after the intervention was measured.
Time Frame
Baseline before any intervention, 0 minutes and 85 minutes after IRI and 24 hours after IRI
Secondary Outcome Measure Information:
Title
Measure pulse variability.
Description
Pulse variability was measured during the experiment.
Time Frame
Baseline before any intervention and until 85 minutes after IRI and 24 hours.
Title
Measure blood pressure.
Description
Blood pressure was measured during the experiment.
Time Frame
Baseline before any intervention and until 85 minutes after IRI and 24 hours.

10. Eligibility

Sex
Male
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria: Healthy and well Exclusion Criteria: Smoker. Taking regular medication. Any acute, chronic or systemic disease No hard physical exercise 72 hours prior to study participation. No alcohol or caffein-containing drinks 24 hours prior to study participation. Fasted for at least 6 hours prior to study participation.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Bente Jespersen, Professor
Organizational Affiliation
Dept. of Renal Diseases, SKS, DK
Official's Role
Principal Investigator
First Name & Middle Initial & Last Name & Degree
Bjarne Kuno Møller, MD
Organizational Affiliation
Dept. of Clinical Immunology, SKS, DK
Official's Role
Study Chair
First Name & Middle Initial & Last Name & Degree
Carla Baan, Professor
Organizational Affiliation
Erasmus Medical Center
Official's Role
Study Chair
Facility Information:
Facility Name
C-Laboratorium, Skejby Sygehus
City
Aarhus N
ZIP/Postal Code
8200
Country
Denmark

12. IPD Sharing Statement

Plan to Share IPD
No

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Immune Modulation by Ischemic Pre-conditioning in Healthy Individuals: Intracellular Signalling in Regulatory Cells

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