Orai1 and STIM1 are critical for cell migration and proliferation of clear cell renal cell carcinoma

Ji Hee Kim, Sayamaa Lkhagvadorj, Mi Ra Lee, Kyu Hee Hwang, Hyunchul Chung, Jaehung Jung, Seungkuy Cha, Minseob Eom

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49 Citations (Scopus)

Abstract

The intracellular Ca 2+ regulation has been implicated in tumorigenesis and tumor progression. Notably, store-operated Ca 2+ entry (SOCE) is a major Ca 2+ entry mechanism in non-excitable cells, being involved in cell proliferation and migration in several types of cancer. However, the expression and biological role of SOCE have not been investigated in clear cell renal cell carcinoma (ccRCC). Here, we demonstrate that Orai1 and STIM1, not Orai3, are crucial components of SOCE in the progression of ccRCC. The expression levels of Orai1 in tumor tissues were significantly higher than those in the adjacent normal parenchymal tissues. In addition, native SOCE was blunted by inhibiting SOCE or by silencing Orai1 and STIM1. Pharmacological blockade or knockdown of Orai1 or STIM1 also significantly inhibited RCC cell migration and proliferative capability. Taken together, Orai1 is highly expressed in ccRCC tissues illuminating that Orai1-mediated SOCE may play an important role in ccRCC development. Indeed, Orai1 and STIM1 constitute a native SOCE pathway in ccRCC by promoting cell proliferation and migration.

Original languageEnglish
Pages (from-to)76-82
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume448
Issue number1
DOIs
Publication statusPublished - 2014 May 23

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All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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