English  |  正體中文  |  简体中文  |  Items with full text/Total items : 90074/105197 (86%)
Visitors : 7158833      Online Users : 45
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    ASIA unversity > 醫學暨健康學院 > 期刊論文 >  Item 310904400/6568

    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/6568

    Title: Effects of insulin replacement on cardiac apoptotic and survival pathways in streptozotocin-induced diabetic rats
    Authors: Wei-Wen Kuo;Min-Jin Lu;Cheng-Tzu Liu;Shih-Ping Wu;Chia-Hua Kuo;Fuu-Jen Tsai;Chang-Hai Tsai;Hung-Chien Wu;Chih-Yang Huang;Shin-Da Lee
    Date: 2009
    Issue Date: 2009-12-23 14:20:36 (UTC+8)
    Publisher: Asia University
    Abstract: Increased myocyte apoptosis in diabetic hearts has been previously reported. Therefore, the purpose of this study was to evaluate the effects of insulin on cardiac apoptotic, hypertrophic, and survival pathways in streptozotocin (STZ)-induced diabetic rats. Forty-eight male Wistar rats at 8 weeks of age were randomly divided into control group (Control), STZ-induced (65 mg/kg STZ i.v.) Type 1-like diabetic rats (DM), and DM rats with 4 IU insulin replacement (DI) for 4 and 8 weeks, respectively. The levels of protein involved in cardiac apoptotic, hypertrophic, and survival pathways were measured by Western blotting. Cardiac mitochondrial-dependent apoptotic pathways, such as Bad, cytosolic cytochrome c, activated caspase 9 and 3, and calcineurin-nuclear factor activation transcription 3 (NFAT3) hypertrophic pathway in DM were increased compared to Control and attenuated in DI group after 8 weeks whereas those were not found after 4 weeks. Cardiac anti-apoptotic Bcl2 and phosphorylated-Bad were significantly decreased in DM group but not in DI group after 8 weeks. Insulin-like growth factor-I receptor (IGFIR), phosphatidylinositol 3'-kinase (PI3K), and the protein kinase B (Akt) were significantly decreased in DM relative to Control and DI after 8 weeks whereas those were not found after 4 weeks. Insulin replacement not only prevents activation of the cardiac mitochondrial-dependent apoptotic pathway and calcineurin-related NFAT3 hypertrophic pathway in diabetes but it also enhances the cardiac insulin/IGFIR-PI3K-Akt survival pathway, all of which are attenuated with insulin therapeutic duration-dependent manners. The findings may provide possible diabetes-related apoptotic, hypertrophic, and survival pathways for potentially preventing cardiac abnormality in diabetes.
    Relation: CELL BIOCHEMISTRY AND FUNCTION 0 (0): 1-27
    Appears in Collections:[醫學暨健康學院] 期刊論文

    Files in This Item:

    File SizeFormat

    All items in ASIAIR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback