Deregulated FADD expression and phosphorylation in T-cell lymphoblastic lymphoma

Oncotarget. 2016 Sep 20;7(38):61485-61499. doi: 10.18632/oncotarget.11370.

Abstract

In the present work, we show that T-cell lymphoblastic lymphoma cells exhibit a reduction of FADD availability in the cytoplasm, which may contribute to impaired apoptosis. In addition, we observe a reduction of FADD phosphorylation that inversely correlates with the proliferation capacity and tumor aggressiveness. The resultant balance between FADD-dependent apoptotic and non-apoptotic abilities may define the outcome of the tumor. Thus, we propose that FADD expression and phosphorylation can be reliable biomarkers with prognostic value for T-LBL stratification.

Keywords: Fas-associated death domain protein (FADD); T-cell lymphoblastic lymphoma; expression and phosphorylation; prognostic marker; tumor aggressiveness.

MeSH terms

  • Animals
  • Apoptosis
  • Biomarkers, Tumor / genetics
  • Biomarkers, Tumor / metabolism*
  • Casein Kinase Ialpha / metabolism
  • Cell Proliferation
  • Cytoplasm / metabolism
  • DNA, Complementary / genetics
  • DNA, Complementary / isolation & purification
  • Down-Regulation
  • Dual-Specificity Phosphatases / metabolism
  • Fas-Associated Death Domain Protein / genetics
  • Fas-Associated Death Domain Protein / metabolism*
  • Female
  • Gene Expression Profiling
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • Immunohistochemistry
  • Intracellular Signaling Peptides and Proteins / metabolism
  • Jurkat Cells
  • Kaplan-Meier Estimate
  • Leukemia, Experimental / genetics
  • Leukemia, Experimental / mortality
  • Leukemia, Experimental / pathology
  • Mice
  • Mice, Inbred C57BL
  • Mitogen-Activated Protein Kinase Phosphatases / metabolism
  • Phosphorylation
  • Precursor T-Cell Lymphoblastic Leukemia-Lymphoma / genetics*
  • Precursor T-Cell Lymphoblastic Leukemia-Lymphoma / mortality
  • Precursor T-Cell Lymphoblastic Leukemia-Lymphoma / pathology*
  • Prognosis
  • Protein Serine-Threonine Kinases / metabolism
  • Risk Assessment / methods
  • Sequence Analysis, DNA
  • Serine / metabolism
  • Thymocytes / metabolism
  • Thymocytes / pathology
  • Up-Regulation

Substances

  • Biomarkers, Tumor
  • DNA, Complementary
  • FADD protein, human
  • Fas-Associated Death Domain Protein
  • Intracellular Signaling Peptides and Proteins
  • Serine
  • Casein Kinase Ialpha
  • HIPK3 protein, human
  • Protein Serine-Threonine Kinases
  • Mitogen-Activated Protein Kinase Phosphatases
  • DUSP26 protein, human
  • Dual-Specificity Phosphatases