1. A thromboxane effect of a hydroxytyrosol-rich olive oil wastewater extract in patients with uncomplicated type I diabetes
- Author
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Jean-Paul Cristol, Marie-Annette Carbonneau, Bernard Descomps, F. Michel, Louis Monnier, Emilie Mas, and Claude L. Léger
- Subjects
Vitamin ,Adult ,Male ,medicine.medical_specialty ,Time Factors ,Platelet Aggregation ,Bilirubin ,Medicine (miscellaneous) ,Dinoprost ,Waste Disposal, Fluid ,Antioxidants ,chemistry.chemical_compound ,Internal medicine ,medicine ,Humans ,Plant Oils ,Olive Oil ,Aged ,Waste Products ,Nutrition and Dietetics ,Vitamin C ,Dose-Response Relationship, Drug ,business.industry ,Albumin ,Middle Aged ,Phenylethyl Alcohol ,Thromboxane B2 ,Endocrinology ,Diabetes Mellitus, Type 1 ,chemistry ,Hydroxytyrosol ,Uric acid ,business ,Blood sampling ,Waste disposal - Abstract
To assess the antioxidant/non-antioxidant effects of a hydroxytyrosol (HT)-rich phenolic extract from olive mill wastewaters administered with a breakfast.Five type I diabetic patients received 25 mg of HT the first day and 12.5 mg/day the following 3 days. Blood sampling was carried out at T(0) (baseline) and T(4d) just before the breakfast + HT administration and at time points 1, 2, 3 and 4 h after T(0). Urines (24-h) were collected from T(0) to T(4d). Baseline HbA1c was generally inferior to 10%, glycemia was within the range 6-24 mmol/l, whereas total cholesterol, HDL-chol and triglycerides were normal.The major finding was the 46% decrease in the serum TXB(2) production after blood clotting at T(4d). Plasma vitamin A, E, beta-carotene were not changed. Vitamin C tended to increase (P = 0.075). Plasma antioxidant capacity was enhanced at T(0)+1 h only, whereas its main determinants (albumin, bilirubin, uric acid) were not modified. Urinary 8-isoPGF(2alpha) levels were highly variable and were not affected significantly by HT administration.The major effect of HT accounts for an antiaggregating platelet action, leading to a possible prevention of thrombotic and microthrombotic processes.
- Published
- 2005