Open Access

Y‑box binding protein 1 acts as a negative regulator of stearoyl CoA desaturase 1 in clear cell renal cell carcinoma

  • Authors:
    • Eric Jeffords
    • Samuel Freeman
    • Breanna Cole
    • Kate Root
    • Thierry Chekouo
    • Richard G. Melvin
    • Lynne Bemis
    • Glenn E. Simmons Jr
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  • Published online on: August 26, 2020     https://doi.org/10.3892/ol.2020.12026
  • Article Number: 165
  • Copyright: © Jeffords et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Y‑box binding protein 1 (YB‑1) is a regulatory protein associated with oncogenesis and poor prognosis in patients with cancer. In the cell, YB‑1 functions as a DNA and RNA binding protein that promotes or suppresses expression of target genes. The cancer‑promoting activity of YB‑1 is mediated through its activation of oncogenes and repression of tumor suppressor genes. Lipogenic enzyme stearoyl‑CoA desaturase (SCD1) drives the production of endogenous monounsaturated fatty acids (MUFAs) in cells and protects against toxic buildup of saturated fatty acids. Clear cell renal cell carcinoma (ccRCC) is often characterized by aberrantly high SCD1 expression and cytosolic accumulation of unsaturated fatty acids. In the present study, a proteomics screen of cells treated with inhibitors of SCD1 supported a potential relationship between YB‑1 and SCD1. It was revealed that the presence of MUFAs led to increased protein synthesis and increased expression of high molecular weight forms of YB‑1 in ccRCC cells, but not in non‑tumorigenic cells. Ectopic expression of YB‑1 led to decreased expression levels of SCD1 protein and mRNA in ccRCC cell lines. Conversely, targeted knockdown of YB‑1 increased SCD1 mRNA abundance. Analysis of ccRCC patient data from the Cancer Proteome Atlas database showed YB‑1 expression was negatively associated with survival, whereas SCD1 was associated with improved survival. These data suggested an antagonistic relationship between YB‑1 and SCD1 that may influence survival of patients with ccRCC.
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November-2020
Volume 20 Issue 5

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Jeffords E, Freeman S, Cole B, Root K, Chekouo T, Melvin RG, Bemis L and Simmons Jr GE: Y‑box binding protein 1 acts as a negative regulator of stearoyl CoA desaturase 1 in clear cell renal cell carcinoma. Oncol Lett 20: 165, 2020.
APA
Jeffords, E., Freeman, S., Cole, B., Root, K., Chekouo, T., Melvin, R.G. ... Simmons Jr, G.E. (2020). Y‑box binding protein 1 acts as a negative regulator of stearoyl CoA desaturase 1 in clear cell renal cell carcinoma. Oncology Letters, 20, 165. https://doi.org/10.3892/ol.2020.12026
MLA
Jeffords, E., Freeman, S., Cole, B., Root, K., Chekouo, T., Melvin, R. G., Bemis, L., Simmons Jr, G. E."Y‑box binding protein 1 acts as a negative regulator of stearoyl CoA desaturase 1 in clear cell renal cell carcinoma". Oncology Letters 20.5 (2020): 165.
Chicago
Jeffords, E., Freeman, S., Cole, B., Root, K., Chekouo, T., Melvin, R. G., Bemis, L., Simmons Jr, G. E."Y‑box binding protein 1 acts as a negative regulator of stearoyl CoA desaturase 1 in clear cell renal cell carcinoma". Oncology Letters 20, no. 5 (2020): 165. https://doi.org/10.3892/ol.2020.12026