Exercise and vitamin C supplementation in type one diabetes mellitus

ISRCTN ISRCTN96164937
DOI https://doi.org/10.1186/ISRCTN96164937
Secondary identifying numbers N/A
Submission date
16/04/2008
Registration date
12/06/2008
Last edited
27/03/2012
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Nutritional, Metabolic, Endocrine
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Not provided at time of registration

Contact information

Dr Gareth Davison
Scientific

University of Ulster
Jordanstown
Shore Road
Newtownabbey
BT37 OQB
United Kingdom

Study information

Study designA balanced single-centre randomised double-blind placebo-controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeScreening
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleMolecular detection of exercise-induced free radicals following ascorbate prophylaxis in type one diabetes mellitus: a randomised controlled trial
Study objectivesConsistent with the human literature, we hypothesise that compared to healthy controls:
1. Exercise would compound basal oxidative stress in type one diabetics, and
2. Ascorbic acid would provide effective prophylaxis

A randomised, double-blind, placebo-controlled experimental design incorporating an electron paramagnetic resonance (EPR) spin-trapping technique combined with a comprehensive assessment of lipid peroxidation and non-enzymatic antioxidants will be employed to test these hypotheses.
Ethics approval(s)Ethics approval received from The Bro Taf (Wales) Research Ethics Committee on the 18th December 1996 (ref: 96/1649).
Health condition(s) or problem(s) studiedType one diabetes mellitus
InterventionSubjects were randomised to receive:
1. 1 g ascorbic acid two hours prior to exercise
2. Placebo two hours prior to exercise

Supplementation took place once only for both treatment groups, and the follow up was conducted immediately post-exercise and 24 hours later via telephone.
Intervention typeDrug
Pharmaceutical study type(s)
PhaseNot Specified
Drug / device / biological / vaccine name(s)Ascorbic acid
Primary outcome measureFree radical species in human blood, measured before supplementation, two hours after supplementation (before exercise) and immediately after exercise.
Secondary outcome measuresBlood biochemical markers such as lipid hydroperoxides, vitamin C and vitamin E, measured before supplementation, two hours after supplementation (before exercise) and immediately after exercise.
Overall study start date01/01/2001
Completion date01/06/2001

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexMale
Target number of participants12 male type one diabetic patients; 14 apparently healthy male volunteers
Key inclusion criteriaDiabetic volunteers were recruited from the adult diabetic clinic at the University Hospital of Wales, based on the following inclusion criteria:
1. Males aged 18 - 30 years
2. Glycosylated haemoglobin (HbA1c) of between 7 - 10%
3. Microalbuminuria negative
4. No underlying vascular complications

Non-diabetic control subjects were recruited from the student population of the University of Glamorgan, based on the following inclusion criteria:
1. Matched for age
2. Matched for fitness
3. No metabolic or circulatory medical condition
4. Had no family history of diabetes as confirmed via interview and medical history questionnaire
Key exclusion criteria1. Cardiovascular disease
2. Hypertension
3. Any other known cardiac complication
Date of first enrolment01/01/2001
Date of final enrolment01/06/2001

Locations

Countries of recruitment

  • United Kingdom

Study participating centre

University of Ulster
Newtownabbey
BT37 OQB
United Kingdom

Sponsor information

University of Glamorgan (UK)
University/education

Pontypridd
Cardiff
CF37 1DL
Wales
United Kingdom

Website http://www.glam.ac.uk/
ROR logo "ROR" https://ror.org/02mzn7s88

Funders

Funder type

Hospital/treatment centre

University of Glamorgan (UK)

No information available

University Hospital of Wales (UK)

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 01/11/2008 Yes No