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Ann Surg Oncol. 2010 Nov;17(11):2976-83. doi: 10.1245/s10434-010-1118-9. Epub 2010 Jun 2.

Association of high levels of Jagged-1 and Notch-1 expression with poor prognosis in head and neck cancer.

Author information

1
Department of Medicine, Chang Gung Memorial Hospital, Chia-Yi, Taiwan.

Abstract

BACKGROUND:

The aim of this study was to evaluate the prognostic value of the Jagged-1/Notch-1 expression in patients with head and neck carcinoma and to examine the possible role of the Jagged-1/Notch-1 signaling in tumorigenesis.

METHODS:

Immunohistochemical staining was performed on 59 formalin-fixed, paraffin-embedded head and neck carcinoma surgical specimens for Jagged-1 and Notch-1 expression. The head and neck cancer cell line, Fadu, with or without ectopic expression of the intracellular domain of Notch-1 (NICD) was also used for examining the tumorigenic capacity in vitro and in vivo.

RESULTS:

The study included 59 patients with a median age of 54 years (range, 35-73 years). Patients harboring tumors with both high-level Jagged-1 (J1(Hi)) and high-level Notch-1 (N1(Hi)) had a worse overall survival than the patients only with J1(Hi) or N1(Hi) as well as the patients with low-level Jagged-1 and Notch-1 (J1(Lo)/N1(Lo)) (P < 0.001). The 5-year survival rate and the median survival time were 5% and 10.9 months for J1(Hi)/N1(Hi) patients, while they were 35.04% and 47.7 months for non-J1(Hi)/Ni(Hi) patients. Ectopic expression of the active Notch-1 (NICD) in Fadu cells greatly enhanced cell migration and invasiveness in vitro and tumorigenic capacity in vivo.

CONCLUSIONS:

High-level coexpression of Jagged-1 and Notch-1 is associated with poor overall survival in patients with head and neck cancer. Constitutive activation of the Notch signaling, which is possibly initiated by the direct interaction between Jagged-1 and Notch-1 in head and neck cancer, confers tumor cells with a more aggressive phenotype.

PMID:
20517681
DOI:
10.1245/s10434-010-1118-9
[Indexed for MEDLINE]

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