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Suppression of Elk1 inhibits thyroid cancer progression by mediating PTEN expression

Yakun Kong1, Junjie Yin2, Yun Fu3

  • 1Department of Endocrinology, Xinxiang Central Hospital, Xinxiang, Henan 453000, P.R. China.

Oncology Reports
|July 18, 2018
PubMed

Insights

ETS-domain containing protein (Elk1) is upregulated in thyroid cancer. Inhibiting Elk1 promotes apoptosis and restrains thyroid cancer cell proliferation by regulating early growth response-1 (Egr-1) and PTEN.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • ETS-domain containing protein (Elk1) is an ETS oncogene family member implicated in tumorigenesis in various cancers.
  • The specific role of Elk1 in thyroid cancer progression is not well understood.

Purpose of the Study:

  • To investigate the role of Elk1 in thyroid cancer.
  • To elucidate the underlying molecular mechanisms of Elk1 in thyroid cancer progression.

Main Methods:

  • Analysis of Elk1 expression in thyroid cancer tissues and cells.
  • Investigating the effects of Elk1 loss-of-function on Egr-1 and PTEN expression.
  • Assessing the impact of Elk1 reduction on apoptosis and cell proliferation.
  • Evaluating the role of Egr-1 in mediating Elk1's effects on PTEN, apoptosis, and proliferation.

Main Results:

  • Elk1 expression was significantly upregulated in thyroid cancer tissues and cells.
  • Loss of Elk1 function led to increased expression of early growth response-1 (Egr-1) and PTEN.
  • Elk1 reduction promoted apoptosis and inhibited thyroid cancer cell proliferation.
  • Egr-1 inhibition abrogated the PTEN induction and the effects on apoptosis and proliferation caused by Elk1 reduction.

Conclusions:

  • Elk1 inhibition induces apoptosis and restrains proliferation in thyroid cancer cells.
  • The Elk1/Egr-1/PTEN pathway is a key mechanism underlying Elk1's role in thyroid cancer.
  • Elk1 represents a potential therapeutic target for thyroid cancer treatment.

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