CHANGE OF SOME OXIDATIVE STRESS PARAMETERS AFTER SUPPLEMENTATION WITH WHEY PROTEIN ISOLATE IN TYPE 2 DIABETIC PATIENTS: Whey protein isolate in oxidative stress
GiuseppeDerosa Nutrition 14 December
Highlights
• Chronic hyperglycemia is associated with long-term damage, especially the eyes, kidneys, nerves, heart, and blood vessels
• The development of these disorders reflects complex pathological processes in which the oxidative stress caused by reactive oxygen species
• Daily supplementation of undenaturated cysteine-rich whey protein isolate improved oxidative stress and inflammatory markers
Scope
to evaluate the effects of undenaturated whey protein isolate (≥ 92,5% WPI) with a high content of native cysteine (2,7%) and a standardized content of lactoferrin (≥ 0,7%), on parameters related to oxidative stress and inflammation, in subjects with type 2 diabetes mellitus.
Methods and results
120 Caucasian type 2 diabetic patients with glycated hemoglobin (HbA1c) level ≥ 6.5 % were randomly assigned to 2 groups, and were daily supplemented with WPI or with placebo for 3 months. After 3 months the markers of oxidation (SOD, GSH-Px, GSH, and GSH/GSSG) and inflammation (PCR, IL-6, TNF-α, MDA) were significantly lower in the WPI group compared with the placebo group (p ˂ 0.05). The WPI group obtained a significant improvement in the lipid profile and a reduction in fasting plasma glucose compared to baseline and to placebo (p< 0.05). No variations of body weight, BMI or circumferences and MMP-2, MMP-9, and sRAGE were recorded in both groups.
Conclusion
the supplementation with WPI may be useful in diabetic patients to control fasting glycemia. Moreover, it can help in improving inflammatory and oxidative stress that play a crucial role in the development of diabetes complications, and also in the progression of other chronic diseases.