We updated the design of this site on December 18, 2017. Learn more.
ClinicalTrials.gov
ClinicalTrials.gov Menu

Effects of Melatonin and Oxygen Consumption and Choroidal Blood Flow (MelO2)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00675181
Recruitment Status : Completed
First Posted : May 8, 2008
Last Update Posted : September 11, 2012
Sponsor:
Information provided by (Responsible Party):
University Hospital, Basel, Switzerland

Brief Summary:

Does melatonin affect basal metabolic rate, increase choroidal blood flow and reduce the vasospastic syndrome (VS)?

The main questions are:

Do women with VS exhibit...

  • a different basal metabolic rate
  • a reduced choroidal blood flow
  • a reduced increase of oxygen consumption after intake of ice-water
  • a different oxygen consumption after melatonin intake
  • a different choroidal blood flow after melatonin intake
  • a different oxygen consumption after melatonin intake and after intake of ice-water….?

Condition or disease Intervention/treatment
Vasospastic Syndrome Drug: Melatonin Drug: Placebo

Detailed Description:

Study description:

Melatonin, a natural hormone of the pineal gland exclusively released during the dark phase, exhibits vasodilatatory effects in distal skin regions and reduces core body temperature. This study investigates whether exogenous melatonin (5mg p.o. at 2p.m.) in the afternoon, when no endogenous melatonin is secreted, increases not only distal skin blood flow, but also choroidal blood flow and changes oxygen consumption. Two subject groups were studied, women with vasospastic syndrome (VS) and controls. The main hypothesis is: melatonin normalizes distal vasoconstriction in VS.

Further questions will also be answered:

Does melatonin affect basal metabolic rate, increase choroidal blood flow and reduce the vasospastic syndrome (VS)?

Do women with VS exhibit:

  • a different basal metabolic rate
  • a reduced choroidal blood flow
  • a reduced increase of oxygen consumption after intake of ice-water
  • a different oxygen consumption after melatonin intake
  • a different choroidal blood flow after melatonin intake
  • a different oxygen consumption after melatonin intake and after intake of ice-water....?

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 16 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Basic Science
Official Title: Effects of Melatonin on Oxygen Consumption and Choroidal Blood Flow in Women With Vasospastic Syndrome in Comparison to Controls
Study Start Date : May 2008
Primary Completion Date : January 2010
Study Completion Date : January 2010

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Oxygen Therapy
Drug Information available for: Melatonin
U.S. FDA Resources

Arm Intervention/treatment
Active Comparator: A, 1
A, 1 = Melatonin
Drug: Melatonin
5mg per os
Placebo Comparator: A, 2
A,2 = Placebo
Drug: Placebo
per os



Primary Outcome Measures :
  1. -choroidal blood flow -oxygen consumption -Co2 production -skin temperatures -rectal temperatures -blood pressure -eye tension [ Time Frame: continously or 2-5 times ]


Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   20 Years to 30 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • vasospastic syndrome
  • healthy

Exclusion Criteria:

  • sick
  • BMI >25 or <18
  • migraine
  • drug intake

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00675181


Locations
Switzerland
University Eye Clinic
Basel, Switzerland, 4031
Sponsors and Collaborators
University Hospital, Basel, Switzerland
Investigators
Study Director: Selim Orguel, MD University Eye Clinic, Basel, Switzerland

Responsible Party: University Hospital, Basel, Switzerland
ClinicalTrials.gov Identifier: NCT00675181     History of Changes
Other Study ID Numbers: 087-KRK-2008-002
First Posted: May 8, 2008    Key Record Dates
Last Update Posted: September 11, 2012
Last Verified: September 2012

Keywords provided by University Hospital, Basel, Switzerland:
melatonin
skin blood flow
choroidal blood flow
vasospastic subjects
normal subjects

Additional relevant MeSH terms:
Syndrome
Disease
Pathologic Processes
Melatonin
Antioxidants
Molecular Mechanisms of Pharmacological Action
Protective Agents
Physiological Effects of Drugs
Central Nervous System Depressants