Open Access

Treatment with toll‑like receptor 2 inhibitor ortho‑vanillin alleviates lipopolysaccharide‑induced acute kidney injury in mice

  • Authors:
    • Yuan Peng
    • Long Liu
    • Yongfang Wang
    • Jianyin Yao
    • Fang Jin
    • Tao Tao
    • Hua Yuan
    • Lei Shi
    • Shiqi Lu
  • View Affiliations

  • Published online on: October 31, 2019     https://doi.org/10.3892/etm.2019.8157
  • Pages: 4829-4837
  • Copyright: © Peng et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Reducing inflammation is a promising approach for the prevention and treatment of septic acute kidney injury (AKI), since AKI is characterized by excessive inflammation in the kidney. Previous studies have demonstrated that toll‑like receptor 2 (TLR2) is overstimulated, which promotes inflammation by activating the NF‑κB signaling pathway, in a lipopolysaccharide (LPS)‑induced model of AKI mice. For the present study, it was hypothesized that TLR2 inhibition could reduce inflammation and consequently prevent septic AKI. Therefore, the potential renal protective effects of ortho‑vanillin (OV), an inhibitor of TLR2, were investigated in the present study in vitro and in vivo. In vitro treatment with OV on LPS‑stimulated mouse podocyte cell line MPC5 did not affect TLR2 expression but interrupted the interaction between TLR2 and its downstream adaptor MyD88, resulting in the reduction of inflammatory cytokines IL‑6 and TNF‑α expression. In vivo OV treatment in an LPS‑challenged mouse model effectively alleviated LPS‑induced kidney injury as indicated by histology analysis and the significantly reduced blood urea nitrogen and serum creatinine levels. Additionally, inflammatory cytokines TNF‑α, IL‑6 and IL‑1β expression were also significantly reduced in mice with OV treatment. Signaling pathway analysis further demonstrated that OV treatment did not affect the expression of TLR2 and p65 but suppressed p65 phosphorylation. Taken together, data from the present study demonstrated that OV was effective in protecting renal function against LPS‑induced AKI through the inhibition of TLR2/NF‑κB signaling and subsequent inflammatory cytokine production. These findings indicated that OV or targeting TLR2 signaling in general, represents a novel therapeutic approach for use in the prevention and treatment of AKI.

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December 2019
Volume 18 Issue 6

Print ISSN: 1792-0981
Online ISSN:1792-1015

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APA
Peng, Y., Liu, L., Wang, Y., Yao, J., Jin, F., Tao, T. ... Lu, S. (2019). Treatment with toll‑like receptor 2 inhibitor ortho‑vanillin alleviates lipopolysaccharide‑induced acute kidney injury in mice. Experimental and Therapeutic Medicine, 18, 4829-4837. https://doi.org/10.3892/etm.2019.8157
MLA
Peng, Y., Liu, L., Wang, Y., Yao, J., Jin, F., Tao, T., Yuan, H., Shi, L., Lu, S."Treatment with toll‑like receptor 2 inhibitor ortho‑vanillin alleviates lipopolysaccharide‑induced acute kidney injury in mice". Experimental and Therapeutic Medicine 18.6 (2019): 4829-4837.
Chicago
Peng, Y., Liu, L., Wang, Y., Yao, J., Jin, F., Tao, T., Yuan, H., Shi, L., Lu, S."Treatment with toll‑like receptor 2 inhibitor ortho‑vanillin alleviates lipopolysaccharide‑induced acute kidney injury in mice". Experimental and Therapeutic Medicine 18, no. 6 (2019): 4829-4837. https://doi.org/10.3892/etm.2019.8157