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Shikonin Inhibites Migration and Invasion of Thyroid Cancer Cells by Downregulating DNMT1

Yue Zhang1, Bin Sun2, Zhi Huang3

  • 1Department of Interventional Radiology, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China (mainland).

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
|February 2, 2018
PubMed

Insights

Shikonin, a herbal medicine component, inhibits papillary thyroid cancer cell migration by reducing DNA methyltransferase 1 (DNMT1) expression and PTEN gene methylation, thereby increasing PTEN protein levels.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Shikonin is a natural compound derived from traditional Chinese herbal medicine.
  • Papillary thyroid cancer (PTC) cell migration is a critical factor in metastasis.
  • Understanding the molecular mechanisms regulating PTC cell migration is essential for developing targeted therapies.

Purpose of the Study:

  • To investigate the effects of shikonin on the migration and invasion of TPC-1 papillary thyroid cancer cells.
  • To examine the impact of shikonin on the expression of PTEN and DNMT1 genes.
  • To elucidate the role of PTEN methylation and DNMT1 in shikonin-mediated effects on PTC cells.

Main Methods:

  • Cell Counting Kit-8 (CCK-8) assay for cell proliferation.
  • Transwell motility assay for cell migration and invasion.
  • Western blot for PTEN and DNMT1 protein expression.
  • Methylation-specific PCR (MSP) for PTEN gene methylation analysis.

Main Results:

  • Shikonin inhibited TPC-1 cell proliferation and migration in a dose-dependent manner.
  • Shikonin treatment reduced DNMT1 expression and PTEN gene methylation.
  • Shikonin increased PTEN protein expression, while DNMT1 overexpression promoted migration and methylation.

Conclusions:

  • Shikonin effectively suppresses papillary thyroid cancer cell migration and invasion.
  • The mechanism involves downregulating DNMT1, decreasing PTEN methylation, and upregulating PTEN expression.
  • Shikonin shows potential as a therapeutic agent for papillary thyroid cancer.

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