High expression of Cathepsin D in Non-Hodgkin's Lymphomas negatively impacts on clinical outcome

Giuseppina Nicotra, Federica Manfroi, Carlo Follo, Roberta Castino, Nicola Fusco, Claudia Peracchio, Simonetta Kerim, Guido Valente, Ciro Isidoro

Research output: Contribution to journalArticle

Abstract

The lysosomal protease Cathepsin D (CD) has been implicated in the homeostasis of lymphatic tissues. We investigated whether the level of CD expression influences the progression and the clinical outcome in Non-Hodgkin's Lymphomas (NHLs). The expression of CD was assessed by immunohistochemistry and immunofluorescence in biopsies of Diffuse Large B Cell Lymphomas (DLBCL, 35 cases), Follicular Lymphomas (FL, 9 cases of grade I-II plus 14 cases of grade IIIB), Chronic Lymphocytic Leukaemias (CLL, 17 cases) and Peripheral T-cell Lymphomas (PTCL, 5 cases). CD staining showed a cytoplasmic punctate pattern compatible with its lysosomal localization. Based on the level of CD expression and the proportion of positive cells, lymphomas were classified as 'low expressing' (<20% of tumor cells) or 'highly expressing' (≥ 20% of tumor cells). Lymphomas highly expressing CD were associated with a worse stage (III-IV) at diagnosis (31/34 cases; p = 0.002) and with a poor clinical outcome (i.e., partial remission and death; 28/34 cases; p = 0.03). In the subgroup of aggressive/high grade of malignancy lymphomas (i.e., DLBCL, FL IIIB and PTCL), the Kaplan-Meier curve revealed a very low cumulative overall survival probability (∼ 20% at 5 year) for patients bearing a NHL with > 40% CD-positive cells compared to that of patients bearing a NHL with <20% CD-positive cells (∼ 70% at 5 year). This correlation was statistically significant (log-rank test, p = 0.01). In Cox multivariate analysis CD failed to be a prognosticator independent of pathologic stage, though the hazard ratio confirmed the association of low expression with a better survival probability. These data indicate that the presence of a high percentage of CD-positive tumor cells negatively reflects on the progression of NHLs.

Original languageEnglish
Pages (from-to)167-183
Number of pages17
JournalDisease Markers
Volume28
Issue number3
DOIs
Publication statusPublished - 2010

Keywords

  • Cathepsin D
  • lymphomas
  • prognosis
  • tumor marker

ASJC Scopus subject areas

  • Biochemistry, medical
  • Clinical Biochemistry
  • Molecular Biology
  • Genetics

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  • Cite this

    Nicotra, G., Manfroi, F., Follo, C., Castino, R., Fusco, N., Peracchio, C., Kerim, S., Valente, G., & Isidoro, C. (2010). High expression of Cathepsin D in Non-Hodgkin's Lymphomas negatively impacts on clinical outcome. Disease Markers, 28(3), 167-183. https://doi.org/10.3233/DMA-2010-0698