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Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte

  • Authors:
    • Hua Jiang
    • Peng Qu
  • View Affiliations / Copyright

    Affiliations: Department of Cardiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R. China
    Copyright: © Jiang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 5857-5862
    |
    Published online on: October 16, 2017
       https://doi.org/10.3892/etm.2017.5313
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Abstract

The present study investigated the effects of Ginkgo biloba leaf extract (GBE50) on lipopolysaccharide (LPS) induced Toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) signaling pathway and its effects on angiotensinogen (ATG) and AT1a receptor, so as to explore the mechanism of GBE50 in prevention and treatment of left ventricular remodeling. In vitro cultured neonatal rat ventricular myocytes (NRVMs) were divided into 4 groups including i) control group: DMEM medium; ii) LPS group: iii) LPS + GBE50 group; iv) LPS + caffeic acid phenethyl ester (CAPE, specific inhibitor of NF-κB) group. Nuclear translocation of NF-κB p65 was detected by immunocytochemical method after intervention for 24 h. Expression of TLR4, ATG, AT1a receptors and β-myosin heavy chain (β-MHC) mRNA were detected by reverse transcription-polymerase chain reaction (RT-PCR). Protein content of cardiomyocytes was measured by Coomassie Brilliant Blue method. Under LPS stimulation, expression level of TLR4 mRNA in NRVMs was significantly increased (P<0.01), nuclear translocation of NF-κB p65 was increased, expression levels of ATG, AT1a receptor and β-MHC mRNA and the protein content in cells were also increased significantly (P<0.01). GBE50 and CAPE significantly inhibited nuclear translocation of NF-κB p65. GBE50 and CAPE treatments also reduced the increased mRNA levels of TLR4, ATG, AT1a receptor and β-MHC and protein content in cell caused by LPS stimulation. We concluded that, GBE50 can inhibit the activation of local renin-angiotensin system by inhibiting the activation of TLR4/NF-κB and TLR4/NF-κB, signaling pathway inhibition may be one of the mechanisms of the role of Ginkgo biloba leaf extract in preventing myocardial remodeling.
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Copy and paste a formatted citation
Spandidos Publications style
Jiang H and Qu P: Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte. Exp Ther Med 14: 5857-5862, 2017.
APA
Jiang, H., & Qu, P. (2017). Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte. Experimental and Therapeutic Medicine, 14, 5857-5862. https://doi.org/10.3892/etm.2017.5313
MLA
Jiang, H., Qu, P."Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte". Experimental and Therapeutic Medicine 14.6 (2017): 5857-5862.
Chicago
Jiang, H., Qu, P."Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte". Experimental and Therapeutic Medicine 14, no. 6 (2017): 5857-5862. https://doi.org/10.3892/etm.2017.5313
Copy and paste a formatted citation
x
Spandidos Publications style
Jiang H and Qu P: Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte. Exp Ther Med 14: 5857-5862, 2017.
APA
Jiang, H., & Qu, P. (2017). Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte. Experimental and Therapeutic Medicine, 14, 5857-5862. https://doi.org/10.3892/etm.2017.5313
MLA
Jiang, H., Qu, P."Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte". Experimental and Therapeutic Medicine 14.6 (2017): 5857-5862.
Chicago
Jiang, H., Qu, P."Effects of Ginkgo biloba leaf extract on local renin-angiotensin system through TLR4/NF-κB pathway in cardiac myocyte". Experimental and Therapeutic Medicine 14, no. 6 (2017): 5857-5862. https://doi.org/10.3892/etm.2017.5313
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