Journal
DIABETES CARE
Volume 27, Issue 9, Pages 2178-2183Publisher
AMER DIABETES ASSOC
DOI: 10.2337/diacare.27.9.2178
Keywords
-
Categories
Ask authors/readers for more resources
OBJECTIVE - Oxidative stress resulting from enhanced free-radical formation and/or a defect in antioxidant defenses has been implicated in the pathogenesis of experimental diabetic neuropathy. The objective of this study was to evaluate plasma levels of various biomarkers of oxidative stress in diabetic subjects in relation to the presence or absence of polyneuropathy (PN) and/or cardiovascular autonomic neuropathy (CAN). RESEARCH DESIGN AND METHODS - Plasma 8-iso-prostaglandin (8-iso-PGF(2alpha)) superoxide anion (O(2)(.-)) generation, lag phase to peroxidation by peroxynitrite(ONOO-), vitamin E-to-lipid ratio, and vitamin C were measured in nonsmoking diabetic patients without PN and CAN(PN(+)/CAN(-) group n = 62), in a group with PN but without CAN (PN(+)/CAN(-) group; n = 105), in those with both PN and CAN (PN(+)/CAN(+) group; n = 22), and in healthy control subjects (n = 85). RESULTS - All three markers of oxidative stress were significantly increased, and both markers of antioxidant defense were decreased in the PN(+)/CAN(-) group compared with control subjects for 8-iso-PGF(2alpha), O(2)(.-), and ONOO(-) and a decrease for the vitamin E-to-lipid ratio (all P < 0.05). In the PN(+)/CAN(-) group, a significant increase compared with the PN(-)/CAN(-) group was noted for O(2), whereas the vitamin E-to-lipid ratio and vitamin were reduced (all P < 0.05). No significant differences were noted between the PN(+)/CAN(-) and PN(+)/CAN(+) groups for each of the five markers of oxidative stress. In multivariate models, O(2.)(-) and ONOO(-) were independently associated with neuropathic deficits, but diabetes duration and triglyceride levels were also independent determinants. CONCLUSIONS - Oxidative stress is enhanced in diabetic patients before the development nerves from streptozotocin-induced of PN, without further significant increase in relation to superimposed autonomic neuropathy. However, apart from oxidative stress, diabetes duration and triglyceride levels are also related to the severity of PN.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available