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<p>Triple-negative breast cancer (TNBC) is characterized by aggressive metastatic behavior driven through epithelial-to-mesenchymal transition (EMT). CD1d, a non-classical MHC molecule, modulates immune responses via Natural Killer T (NKT) cells and is implicated in tumor progression. This study examines the effect of CD1d inhibition on EMT in TNBC. We demonstrate that Zerumbone (ZER, 20 µM), a phytochemical, downregulates CD1d, reducing EMT markers, cell migration, and adhesion in MDA-MB-468 and MDA-MB-231 TNBC cell lines. Conversely, CD1d upregulation by α-galactosylceramide (AGC, 2 µM) and thymosin α-1 (TA, 2 µM) promotes EMT, enhances migration and adhesion. Immunofluorescence and Western blot analyses confirmed ZER suppresses CD1d, vimentin, N-cadherin, and FASN, while increasing E-cadherin, indicating mesenchymal-to-epithelial transition (MET). AGC and TA elevate CD1d and EMT markers. Molecular docking and dynamics simulations show ZER’s stable binding to CD1d (-8.13&#xa0;kcal/mol), supporting the in vitro data and it is predicted to act as a potential CD1d antagonist. These findings suggest that CD1d inhibition may represent a potential strategy to attenuate EMT associated phenotypes in TNBC.</p>

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Zerumbone mediated CD1d inhibition suppresses epithelial to mesenchymal transition in triple negative breast cancer

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月9日

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  • Ritis Kumar Shyanti,
  • Sudhanshu Sharma,
  • Mazharul Haque,
  • Rajan Kumar Tiwari,
  • Rajesh Singh,
  • Manoj Mishra

摘要

Triple-negative breast cancer (TNBC) is characterized by aggressive metastatic behavior driven through epithelial-to-mesenchymal transition (EMT). CD1d, a non-classical MHC molecule, modulates immune responses via Natural Killer T (NKT) cells and is implicated in tumor progression. This study examines the effect of CD1d inhibition on EMT in TNBC. We demonstrate that Zerumbone (ZER, 20 µM), a phytochemical, downregulates CD1d, reducing EMT markers, cell migration, and adhesion in MDA-MB-468 and MDA-MB-231 TNBC cell lines. Conversely, CD1d upregulation by α-galactosylceramide (AGC, 2 µM) and thymosin α-1 (TA, 2 µM) promotes EMT, enhances migration and adhesion. Immunofluorescence and Western blot analyses confirmed ZER suppresses CD1d, vimentin, N-cadherin, and FASN, while increasing E-cadherin, indicating mesenchymal-to-epithelial transition (MET). AGC and TA elevate CD1d and EMT markers. Molecular docking and dynamics simulations show ZER’s stable binding to CD1d (-8.13 kcal/mol), supporting the in vitro data and it is predicted to act as a potential CD1d antagonist. These findings suggest that CD1d inhibition may represent a potential strategy to attenuate EMT associated phenotypes in TNBC.