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Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling

  • Authors:
    • San‑Zhong Li
    • Yi‑Yang Hu
    • Jun‑Long Zhao
    • Jian Zang
    • Zhou Fei
    • Hua Han
    • Hong‑Yan Qin
  • View Affiliations / Copyright

    Affiliations: Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China, Department of Medical Genetics and Developmental Biology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
    Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3781-3788
    |
    Published online on: March 27, 2020
       https://doi.org/10.3892/ol.2020.11476
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Abstract

Human four-and-a-half LIM domains protein 1 (FHL1) is a member of the FHL protein family, which serves an important role in multiple cellular events by interacting with transcription factors using its cysteine‑rich zinc finger motifs. A previous study indicated that FHL1 was downregulated in several types of human cancer and served a role as a tumor suppressive gene. The overexpression of FHL1 inhibited tumor cell proliferation. However, to the best of our knowledge, there is no evidence to confirm whether FHL1 affected glioma growth, and the molecular mechanisms through which FHL1 represses tumor development remain unclear. In the present study, the expression level of FHL1 was determined using immunohistochemical staining in 114 tumor specimens from patients with glioma. The results indicated that FHL1 expression was negatively associated with the pathological grade of gliomas. Furthermore, Kaplan‑Meier survival curves demonstrated that the patients with an increased FHL1 expression exhibited a significantly longer survival time, suggesting that FHL1 may be a prognostic marker for glioma. The protein level of FHL1 was relatively increased in the U251 glioma cell line compared with that in the U87 cell line. Therefore, FHL1 was knocked down in U251 by siRNA and overexpressed in U87, and it was identified that FHL1 significantly decreased the activation of PI3K/AKT signaling by interacting with AKT. Further experiments verified that FHL1 inhibited the growth of gliomas in vivo by modulating PI3K/AKT signaling. In conclusion, the results of the present study demonstrated that FHL1 suppressed glioma development through PI3K/AKT signaling.
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Copy and paste a formatted citation
Spandidos Publications style
Li SZ, Hu YY, Zhao JL, Zang J, Fei Z, Han H and Qin HY: Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling. Oncol Lett 19: 3781-3788, 2020.
APA
Li, S., Hu, Y., Zhao, J., Zang, J., Fei, Z., Han, H., & Qin, H. (2020). Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling. Oncology Letters, 19, 3781-3788. https://doi.org/10.3892/ol.2020.11476
MLA
Li, S., Hu, Y., Zhao, J., Zang, J., Fei, Z., Han, H., Qin, H."Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling". Oncology Letters 19.6 (2020): 3781-3788.
Chicago
Li, S., Hu, Y., Zhao, J., Zang, J., Fei, Z., Han, H., Qin, H."Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling". Oncology Letters 19, no. 6 (2020): 3781-3788. https://doi.org/10.3892/ol.2020.11476
Copy and paste a formatted citation
x
Spandidos Publications style
Li SZ, Hu YY, Zhao JL, Zang J, Fei Z, Han H and Qin HY: Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling. Oncol Lett 19: 3781-3788, 2020.
APA
Li, S., Hu, Y., Zhao, J., Zang, J., Fei, Z., Han, H., & Qin, H. (2020). Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling. Oncology Letters, 19, 3781-3788. https://doi.org/10.3892/ol.2020.11476
MLA
Li, S., Hu, Y., Zhao, J., Zang, J., Fei, Z., Han, H., Qin, H."Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling". Oncology Letters 19.6 (2020): 3781-3788.
Chicago
Li, S., Hu, Y., Zhao, J., Zang, J., Fei, Z., Han, H., Qin, H."Downregulation of FHL1 protein in glioma inhibits tumor growth through PI3K/AKT signaling". Oncology Letters 19, no. 6 (2020): 3781-3788. https://doi.org/10.3892/ol.2020.11476
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