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Increased Expression of Delta-like Ligand 4 in Mycosis Fungoides

Hikari Boki1, Tomomitsu Miyagaki, Yuki Shono

  • 1Department of Dermatology, University of Tokyo Graduate School of Medicine, Tokyo, Japan.

Acta Dermato-Venereologica
|January 14, 2020
PubMed

Insights

Delta-like ligand 4 (DLL4) is elevated in mycosis fungoides, promoting tumor cell proliferation and disease progression. This finding highlights DLL4 as a potential therapeutic target for this cutaneous T-cell lymphoma.

Area of Science:

  • Oncology
  • Dermatology
  • Molecular Biology

Background:

  • Notch pathway dysregulation is implicated in many cancers.
  • In mycosis fungoides, Notch1 and Jagged1 interactions promote tumor cell proliferation.
  • The role of other Notch ligands in mycosis fungoides remains unexplored.

Purpose of the Study:

  • To investigate the role of Delta-like ligand 4 (DLL4) in mycosis fungoides.
  • To determine if DLL4 expression correlates with disease severity and patient outcomes.

Main Methods:

  • Quantitative analysis of DLL4 mRNA levels in lesional skin of mycosis fungoides patients and healthy controls.
  • Immunohistochemical staining to assess DLL4 protein expression in mycosis fungoides lesions.
  • In vitro studies using cutaneous T-cell lymphoma cell lines to evaluate DLL4's effect on proliferation.

Main Results:

  • DLL4 mRNA levels were significantly higher in mycosis fungoides lesional skin compared to normal controls.
  • Elevated DLL4 levels correlated with disease-specific mortality.
  • DLL4 was prominently expressed on vascular endothelial cells and tumor cells in mycosis fungoides lesions.
  • DLL4 enhanced the proliferation of cutaneous T-cell lymphoma cell lines.

Conclusions:

  • Enhanced DLL4 expression is a significant finding in mycosis fungoides.
  • DLL4 may directly contribute to mycosis fungoides progression by promoting tumor cell proliferation.
  • DLL4 represents a potential therapeutic target for mycosis fungoides.
Keywords:
Notch homolog 1cutaneous T-cell lymphomamycosis fungoidesdelta-like ligand 4

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