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Recombinant Human Superoxide Dismutase (rhSOD) and Vascular Reactivity

This study has been completed.
Polymun Scientific, Vienna, Austria
Information provided by:
Medical University of Vienna Identifier:
First received: December 9, 2005
Last updated: May 21, 2008
Last verified: May 2008

December 9, 2005
May 21, 2008
June 2005
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Forearm blood flow responses to acetylcholine, nitroglycerine and norepinephrine (ratio between intervention and control arm)
Same as current
Complete list of historical versions of study NCT00264186 on Archive Site
Markers of inflammation and oxidative stress, change in MAP, change in pulse rate, subjective symptoms and body temperature; antibodies against rhSOD
Markers of inflammation and oxidative stress, Δ MAP, Δ pulse rate, subjective symptoms and body temperature; antibodies against rhSOD
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Recombinant Human Superoxide Dismutase (rhSOD) and Vascular Reactivity
Impact of rhCu/Zn SOD on Inflammation-Induced Impairment of Vascular Reactivity
Inflammation is characterised by an increased risk for cardiovascular events. Dysfunction of the vascular endothelium caused by oxidative stress might provide a mechanistic link. In acute and chronic inflammation, oxidative stress occurs when the production of reactive oxygen species [ROS] (including superoxide anions [O2-]) exceeds the capacity of the endogenous antioxidant defense systems, resulting in ROS-mediated damage. Recombinant human superoxide dismutase (rhSOD) has shown potent antioxidant properties in in-vitro and animal studies and has been tested in phase I clinical trials in humans. rhSOD could offer a therapeutic option for vascular dysfunction in diseases associated with increased oxidative stress. The investigators, therefore, want to test if the hyporesponsiveness to vasoactive drugs (norepinephrine, acetylcholine and glyceroltrinitrate) during acute inflammation by low-dose lipopolysaccharide (LPS) is due to the increased production of superoxide anions, which could be scavanged by the radical scavenger rhSOD.
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Phase 1
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double-Blind
  • Drug: LPS 2 ng/kg intravenous (IV) bolus
  • Drug: rhSOD 82,000 IU (8.2 mg)/min intraarterially
  • Drug: Norepinephrine 60, 120, 240 pmol/min intraarterially over 5 min/dose level (two times; pre-dose and +3.5 hrs)
  • Drug: Acetylcholine 6.25, 12.5, 25 nmol/min intraarterially over 3 min/dose level (two times; pre-dose and +3.5 hrs)
  • Drug: Glyceroltrinitrate (nitroglycerine) 4, 8, 16 nmol/min over 3 min/dose level (two times; pre-dose and +3.5 hrs)
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
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Inclusion Criteria:

  • Men aged between 18 and 45 years
  • Nonsmokers
  • Body mass index between 15th and 85th percentile
  • Normal findings in medical history and physical examination unless the investigator considers an abnormality to be clinically irrelevant

Exclusion Criteria:

  • Regular use of medication, abuse of alcoholic beverages, or participation in a clinical trial in the 3 weeks preceding the study
  • Evidence of hypertension, pathologic hyperglycemia, or hyperlipidemia
  • Treatment in the previous 3 weeks with any drug
  • Symptoms of a clinically relevant illness in the 3 weeks before the first study day
  • History or presence of gastrointestinal, liver or kidney disease, or other conditions known to interfere with distribution, metabolism or excretion of study drugs
  • Blood donation during the previous 3 weeks
  • History of hypersensitivity to the trial drug or to drugs with a similar chemical structure
Sexes Eligible for Study: Male
18 Years to 45 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
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Medical University of Vienna
Polymun Scientific, Vienna, Austria
Principal Investigator: Michael Wolzt, MD Medical University of Vienna
Medical University of Vienna
May 2008

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP