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2018 ; 18
(1
): 385
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Cathepsin K associates with lymph node metastasis and poor prognosis in oral
squamous cell carcinoma
#MMPMID29618339
Leusink FK
; Koudounarakis E
; Frank MH
; Koole R
; van Diest PJ
; Willems SM
BMC Cancer
2018[Apr]; 18
(1
): 385
PMID29618339
show ga
BACKGROUND: Lymph node metastasis (LNM) is a major determinant of prognosis and
treatment planning of oral squamous cell carcinoma (OSCC). Cysteine cathepsins
constitute a family of proteolytic enzymes with known role in the degradation of
the extracellular matrix. Involvement in pathological processes, such as
inflammation and cancer progression, has been proved. The aim of the study was to
discover the clinicopathological and prognostic implications of cathepsin K
(CTSK) expression in oral squamous cell carcinoma. METHODS: Eighty-three patients
with primary OSCC, treated surgically between 1996 and 2000, were included. Gene
expression data were acquired from a previously reported study. Human papilloma
virus (HPV) status was previously determined by an algorithm for HPV-16. CTSK
Protein expression was semi-quantitatively determined by immunohistochemistry in
tumor and stromal cells. Expression data were correlated with various
clinicopathological variables. RESULTS: Elevated gene and protein expression of
CTSK were strongly associated to LNM and perineural invasion (p?0.01). Logistic
regression analysis highlighted increased CTSK protein expression in tumor cells
as the most significant independent factor of lymphatic metastasis (OR?=?7.65,
CI:2.31-23.31, p?=?0.001). Survival analysis demonstrated CTSK protein expression
in both stromal and tumor cells as significant indicators of poor 5-year disease
specific survival (HR?=?2.40, CI:1.05-5.50, p?=?0.038 for stromal cells;
HR?=?2.79, CI:1.02-7.64, p?=?0.045 for tumor cells). CONCLUSION: Upregulation of
CTSK seems to be associated with high incidence of lymphatic spread and poor
survival in OSCC. CTSK could therefore serve as a predictive biomarker for OSCC.