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HO-1 mediated by PI3K/Akt/Nrf2 signaling pathway is involved in (-)-epigallocatechin-3-gallate-rescueing impaired cognitive function induced by chronic cerebral hypoperfusion in rat model.

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  • Additional Information
    • Source:
      Publisher: Routledge Country of Publication: United States NLM ID: 7603335 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-4657 (Electronic) Linking ISSN: 0361073X NLM ISO Abbreviation: Exp Aging Res Subsets: MEDLINE
    • Publication Information:
      Publication: <2005->: New York : Routledge
      Original Publication: Bar Harbor, Me., EAR, inc.
    • Subject Terms:
      Phosphatidylinositol 3-Kinases*/metabolism ; Phosphatidylinositol 3-Kinases*/pharmacology ; Proto-Oncogene Proteins c-akt*/metabolism ; Proto-Oncogene Proteins c-akt*/pharmacology; Heme Oxygenase (Decyclizing)/*metabolism; Aging ; Animals ; Catechin/analogs & derivatives ; Cognition ; Humans ; NF-E2-Related Factor 2/metabolism ; NF-E2-Related Factor 2/pharmacology ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; Superoxide Dismutase/metabolism ; Superoxide Dismutase/pharmacology
    • Abstract:
      Background: Epigallocatechin-3-gallate (EGCG) has neuroprotection on chronic cerebral hypoperfusion (CCH) against oxidative stress. HO-1 may represent a target for treatment with CCH. This study aimed to observe the effect of EGCG on cognition impaired in a rat model with CCH and investigate the mechanism.
      Methods: Sprague-Dawley rat models of CCH were established using the 2-VO procedures. Novel object recognition and Morris water maze tests were determined the effects of EGCG on the impaired cognitive functions; HE staining was for detecting the histopathological changes; oxidative stress was assessed by measuring MDA, SOD levels and HO-1 activity. Western blots were for the expression of HO-1, PI3K, Akt ( p -Akt), and Nrf2.
      Results: After EGCG treatment, the rats with CCH by 2-VO spent obviously longer time exploring the novel objects, had significantly shorter escape latency and better spatial exploring ability. Meanwhile, EGCG reduced the histopathological changes. Moreover, EGCG increased the concentration of SOD and the activity of HO-1, but decreased the MDA contents. Furthermore, EGCG treatment induced the expression of PI3K, p -Akt, Nrf2, and HO-1 protein, and they were partly reversed by the LY294002, siRNA-Nrf2, or ZnPP.
      Conclusions: EGCG has a neuroprotective effect on rat impaired cognition induced by CCH, possibly by modulating the PI3K/AKT/Nrf2/HO-1 pathway.
    • Accession Number:
      0 (NF-E2-Related Factor 2)
      8R1V1STN48 (Catechin)
      BQM438CTEL (epigallocatechin gallate)
      EC 1.14.14.18 (Heme Oxygenase (Decyclizing))
      EC 1.14.14.18 (Hmox1 protein, rat)
      EC 1.15.1.1 (Superoxide Dismutase)
      EC 2.7.11.1 (Proto-Oncogene Proteins c-akt)
    • Publication Date:
      Date Created: 20220914 Date Completed: 20220915 Latest Revision: 20221130
    • Publication Date:
      20231215
    • Accession Number:
      10.1080/0361073X.2021.2011689
    • Accession Number:
      36102206