Tissue-specific augmentation of circadian PAI-1 expression in mice with streptozotocin-induced diabetes

Thromb Res. 2004;114(2):129-35. doi: 10.1016/j.thromres.2004.05.011.

Abstract

Diabetes is associated with an excess risk of cardiac events, and the risk for infarction is partly determined by plasminogen activator inhibitor-1 (PAI-1). We found that plasma total and active PAI-1 levels increased in a circadian manner in mice with streptozotocin (STZ)-induced diabetes. Circadian expression of PAI-1 mRNA in the lung, heart, liver, and kidney increased in a tissue-specific manner. Peak to peak comparisons revealed that the mRNA expression levels increased by 1.7, 1.7, 1.2, and 1.6-fold in the heart, lung, liver, and kidney, respectively. In contrast, the circadian expression of the clock gene, mPer2, was preserved in the diabetic mice, suggesting that the altered expression of PAI-1 mRNA did not arise due to impaired circadian clocks. Our results suggest that impairment of the coagulation and fibrinolytic systems induced by diabetes is partly due to impaired circadian PAI-1 fluctuation at the level of mRNA expression.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biomarkers / blood
  • Circadian Rhythm / immunology*
  • Diabetes Mellitus, Experimental / blood
  • Diabetes Mellitus, Experimental / immunology*
  • Diabetes Mellitus, Experimental / metabolism*
  • Male
  • Metabolic Clearance Rate
  • Mice
  • Mice, Inbred ICR
  • Organ Specificity
  • Plasminogen Activator Inhibitor 1 / blood
  • Plasminogen Activator Inhibitor 1 / immunology*
  • Plasminogen Activator Inhibitor 1 / metabolism*
  • Tissue Distribution

Substances

  • Biomarkers
  • Plasminogen Activator Inhibitor 1