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  • Title: [Expression of plasminogen activator inhibitor-1 and tissue plasminogen activator in the kidney of KKAy mice with type 2 diabetes].
    Author: Chen LM, Li XW, Huang LW, Li Y.
    Journal: Zhongguo Yi Xue Ke Xue Yuan Xue Bao; 2005 Jun; 27(3):344-8. PubMed ID: 16038272.
    Abstract:
    OBJECTIVE: To study the role of plasminogen activator inhibitor-1 (PAI-1) and tissue plasminogen activator (tPA) in the accumulation of extracellular matrix (ECM) in the kidney of KKAy mice with type 2 diabetes. METHODS: KKAy mice, a type 2 diabetic animal model, and C57BL-J mice were sacrificed at 16, 20, and 24 weeks of age, respectively. The local expression of renal laminin was analyzed with immunohistochemistry. Chromogenic substance was used to show the activity of PAI-1. The mRNA expression of tPA was determined by RT-PCR. The mRNA expression of PAI-1 was measured by reverse transcription-polymerase chain reaction (RT-PCR). RESULTS: Laminnin expression was significantly increased in all age groups of KKAy mice. The tPA mRNA was significantly lower than that in C57BL mice, especially at the age of 16w (only 47%). Otherwise the PAI-1 mRNA expression was remarkably up-regulated than that in C57BL mice. CONCLUSION: In type 2 diabetes KKAy mice, the accumulation of ECM may be associated with the abnormal expression of PAI-1/tPA mRNA.
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