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Oishi, K. et al.

Involvement of circadian clock gene Clock in diabetes- induced circadian augmentation of plasminogen activator inhibitor-1 (PAI-1) expression in the mouse heart.

Diabetes is associated with an excess risk of cardiac events, and one of the risk factors for infarction is the elevated-levels of plasminogen activator inhibitor-1 (PAI-1). To evaluate how the molecular clock mechanism is involved in the diabetes-induced circadian augmentation of PAI-1 gene expression, we examined the expression profiles of PAI-1 mRNA in the hearts of Clock mutant mice with streptozotocin-induced diabetes. Circadian expression of PAI-1 mRNA was blunted to low levels under both normal and diabetic conditions in Clock mutant mice, although the expression rhythm was augmented in diabetic wild-type (WT) mice. Furthermore, plasma PAI-1 levels became significantly higher in WT mice than in Clock mutant mice after STZ administration. Our results suggested that the circadian clock component, CLOCK, is involved in the diabetes-induced circadian augmentation of PAI-1 expression in the mouse heart.[1]

References

Involvement of circadian clock gene Clock in diabetes-induced circadian augmentation of plasminogen activator inhibitor-1 (PAI-1) expression in the mouse heart. Oishi, K., Ohkura, N., Amagai, N., Ishida, N. FEBS Lett. (2005) [Pubmed]

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