Type 2 diabetic patients with ischemic stroke: Decreased insulin sensitivity and decreases in antioxidant enzyme activity are related to different stroke subtypes

Aleksandra Jotic, Nadezda Covickovic Sternic, Vladimir S. Kostic, Katarina Lalic, Tanja Milicic, Milija Mijajlovic, Ljiljana Lukic, Milorad Civcic, Emina Colak, Marija Macesic, Jelena P. Seferovic, Sandra Aleksic, Nebojsa M. Lalic

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

We analyzed (a) insulin sensitivity (IS) and (b) glutathione peroxidase (GSH-Px), glutathione reductase (GR), and superoxide dismutase (SOD) antioxidant enzyme activity in type 2 diabetic (T2D) patients with atherothrombotic infarction (ATI) (group A), lacunar infarction (LI) (B), or without stroke (C) and in nondiabetics with ATI (D), LI (E), or without stroke (F). ATI and LI were confirmed by brain imaging IS levels were determined by minimal model (Si index), and the enzyme activity by spectrophotometry. In T2D patients, Si was lower in A and B versus C (1.14 ± 0.58, 1.00 ± 0.26 versus 3.14 ± 0.62 min-1/mU/l × 104, P < 0.001) and in nondiabetics in D and E versus F (3.38 ± 0.77, 3.03 ± 0.72 versus 6.03 ± 1.69 min-1/mU/l × 104, P < 0.001). Also, GSH-Px and GR activities were lower in A and B versus C (GSH-Px: 21.96 ± 3.56, 22.51 ± 1.23 versus 25.12 ± 1.67; GR: 44.37 ± 3.58, 43.50 ± 2.39 versus 48.58 ± 3.67 U/gHb; P < 0.001) and in D and E versus F (GSH-Px: 24.75 ± 3.02, 25.57 ± 1.92 versus 28.56 ± 3.91; GR: 48.27 ± 6.81, 49.17 ± 6.24 versus 53.67 ± 3.96 U/gHb; P < 0.001). Decreases in Si and GR were significantly related to both ATI and LI in T2D. Our results showed that decreased IS and impaired antioxidant enzymes activity influence ischemic stroke subtypes in T2D. The influence of insulin resistance might be exerted on the level of glutathione-dependent antioxidant enzymes.

Original languageEnglish (US)
Article number401609
JournalInternational Journal of Endocrinology
Volume2013
DOIs
StatePublished - 2013

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Endocrine and Autonomic Systems

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    Jotic, A., Covickovic Sternic, N., Kostic, V. S., Lalic, K., Milicic, T., Mijajlovic, M., Lukic, L., Civcic, M., Colak, E., Macesic, M., Seferovic, J. P., Aleksic, S., & Lalic, N. M. (2013). Type 2 diabetic patients with ischemic stroke: Decreased insulin sensitivity and decreases in antioxidant enzyme activity are related to different stroke subtypes. International Journal of Endocrinology, 2013, [401609]. https://doi.org/10.1155/2013/401609