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Article

TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation

  • Authors:
    • Xia Shi
    • Jingjing Liu
    • Ting Yang
    • Yun Zhang
    • Tingyu Li
    • Jie Chen
  • View Affiliations / Copyright

    Affiliations: Children's Nutrition Research Centre, Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
  • Pages: 5358-5364
    |
    Published online on: April 22, 2016
       https://doi.org/10.3892/mmr.2016.5158
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Abstract

Two previous studies published by our group identified that mesenchymal stromal cells (MSCs) conferred neuroprotection in a rat model of hypoxic-ischaemic brain damage (HIBD), and that MSCs secreted abundant interleukin-6 (IL‑6) when co‑cultured with oxygen and glucose deprivation (OGD)‑injured PC12 cells. The present study has further investigated the role of IL‑6, and explored potential signalling pathways in vitro. In vitro models were established by co‑culturing OGD‑injured PC12 cells with MSCs. Subsequently, the expression levels of the signalling molecules, Toll‑like receptor 2 (TLR2)/nuclear factor κB (NFκB), and IL‑6 were altered separately in this in vitro model by treatment with an agonist, antagonist, siRNA or overexpression adenovirus. The expression levels of B cell lymphoma‑associated X (Bax), TLR2, NFκB and IL‑6 were detected by western blot analysis, real‑time polymerase chain reaction or ELISA. The resting membrane potential (RMP) of the PC12 cells was analysed by whole‑cell patch‑clamp recordings. Compared with controls or the PC12 co‑culture group, the MSC co‑cultured group induced less expression of Bax, but more IL‑6 secretion. Up- or down-regulation of the TLR2/NFκB signalling pathway resulted in a corresponding increase or decrease in the IL‑6 expression level in the MSCs. Co‑culture with siIL‑6‑MSCs increased the expression levels of Bax and increased the RMP in the OGD PC12 cells. In conclusion, the release of IL‑6 from MSCs was regulated via the TLR2/NFκB signalling pathway. Endogenous IL‑6 reduced apoptosis and protected OGD‑injured PC12 cells when they were co‑cultured with MSCs. The present study has reported a novel immunomodulatory effect of the microenvironment of neural damage during MSC cytotherapy.
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Copy and paste a formatted citation
Spandidos Publications style
Shi X, Liu J, Yang T, Zhang Y, Li T and Chen J: TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation. Mol Med Rep 13: 5358-5364, 2016.
APA
Shi, X., Liu, J., Yang, T., Zhang, Y., Li, T., & Chen, J. (2016). TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation. Molecular Medicine Reports, 13, 5358-5364. https://doi.org/10.3892/mmr.2016.5158
MLA
Shi, X., Liu, J., Yang, T., Zhang, Y., Li, T., Chen, J."TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation". Molecular Medicine Reports 13.6 (2016): 5358-5364.
Chicago
Shi, X., Liu, J., Yang, T., Zhang, Y., Li, T., Chen, J."TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation". Molecular Medicine Reports 13, no. 6 (2016): 5358-5364. https://doi.org/10.3892/mmr.2016.5158
Copy and paste a formatted citation
x
Spandidos Publications style
Shi X, Liu J, Yang T, Zhang Y, Li T and Chen J: TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation. Mol Med Rep 13: 5358-5364, 2016.
APA
Shi, X., Liu, J., Yang, T., Zhang, Y., Li, T., & Chen, J. (2016). TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation. Molecular Medicine Reports, 13, 5358-5364. https://doi.org/10.3892/mmr.2016.5158
MLA
Shi, X., Liu, J., Yang, T., Zhang, Y., Li, T., Chen, J."TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation". Molecular Medicine Reports 13.6 (2016): 5358-5364.
Chicago
Shi, X., Liu, J., Yang, T., Zhang, Y., Li, T., Chen, J."TLR2/NFκB signalling regulates endogenous IL-6 release from marrow-derived mesenchymal stromal cells to suppress the apoptosis of PC12 cells injured by oxygen and glucose deprivation". Molecular Medicine Reports 13, no. 6 (2016): 5358-5364. https://doi.org/10.3892/mmr.2016.5158
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