Thymoquinone restores radiation-induced TGF-β expression and abrogates EMT in chemoradiotherapy of breast cancer cells

Shashi Rajput, Prashanth Kumar Bhusetty Nagesh, Payel Banik, Sheetal Parida, Mahitosh Mandal

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Radiotherapy remains a prime approach to adjuvant therapies in patients with early and advanced breast cancer. In spite of therapeutic success, metastatic progression in patients undergoing therapy, limits its application. However, effective therapeutic strategies to understand the cellular and molecular machinery in inhibiting radiation-induced metastatic progression, which is poorly understood so far, need to be strengthened. Ionizing radiation was known to prompt cancer cell's metastatic ability by eliciting Transforming Growth Factor-beta (TGF-β), a key regulator in epithelial-mesenchymal transdifferentiation and radio-resistance. In this viewpoint, we employed thymoquinone as a radiosensitizer to investigate its migration and invasion reversal abilities in irradiated breast cancer cell lines by assessing their respective attributes. The role of metastasis regulatory molecules like TGF-β, E-cadherin, and integrin αV and its downstream molecules were determined using RT-PCR, western blotting, immunofluorescence, and extracellular TGF-β levels affirmed through ELISA assays. These studies affirmed the TGF-β restoring ability of thymoquinone in radiation-driven migration and invasion. Also, results demonstrated that the epithelial markers E-cadherin and cytokeratin 19 were downregulated whereas mesenchymal markers like integrin αV, MMP9, and MMP2 were upregulated by irradiation treatment; however thymoquinone pre-sensitization has reverted the expression of these proteins back to control proteins expression. Here, paclitaxel was chosen as an apoptosis inducer in TGF-β restored cells and confirmed its cytotoxic effects in radiation alone and thymoquinone sensitized irradiated cells. We conclude that this therapeutic modality is effective in preventing radiation-induced epithelial-mesenchymal transdifferentiation and concomitant induction of apoptosis in breast cancer.

Original languageEnglish (US)
Pages (from-to)620-629
Number of pages10
JournalJournal of Cellular Physiology
Volume230
Issue number3
DOIs
StatePublished - Mar 1 2015

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Chemoradiotherapy
Transforming Growth Factor beta
Cells
Radiation
Breast Neoplasms
Cadherins
Integrins
Apoptosis
Keratin-19
Therapeutics
Molecules
Ionizing radiation
Radiotherapy
Paclitaxel
Radiation Effects
Machinery
Ionizing Radiation
Assays
Radio
Proteins

All Science Journal Classification (ASJC) codes

  • Physiology
  • Clinical Biochemistry
  • Cell Biology

Cite this

Thymoquinone restores radiation-induced TGF-β expression and abrogates EMT in chemoradiotherapy of breast cancer cells. / Rajput, Shashi; Bhusetty Nagesh, Prashanth Kumar; Banik, Payel; Parida, Sheetal; Mandal, Mahitosh.

In: Journal of Cellular Physiology, Vol. 230, No. 3, 01.03.2015, p. 620-629.

Research output: Contribution to journalArticle

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