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Backgrounds

Gastric cancer is one of the most common cancers with unsatisfied prognosis. It is challenging to predict gastric cancer prognosis due to its highly heterogeneous nature. Kallikrein 5 (KLK5) belongs to the family of kallikreins, which plays a crucial role in serine proteolysis and exerts diverse physiological functions. The role of KLK5 in human gastric adenocarcinoma (GAC) has not been elucidated. In the present study, we aimed to examine the expression level of KLK5 and dissect whether the KLK5 expression was associated with GAC prognosis.

Patients and methods

Clinicopathological analyses were performed in a retrospective GAC patient cohort (n = 138). The expression of KLK5 was tested by quantitative RT-PCR and immunohistochemistry staining. The prognostic role of KLK5 in GAC was assessed by univariate and multivariate analyses. The effects of KLK5 on cell proliferation, migration, and invasion were examined through cellular experiments.

Results

The data showed that KLK5 expression was elevated in GAC tissues compared with normal stomach tissues. Protein expression of KLK5 was positively correlated with tumor invasion depth and lymph node metastasis. Patients with higher KLK5 expression had poorer overall survival. KLK5 was identified to be an independent risk factor according to multivariate analysis. Using human GAC cell lines, we found that KLK5 can promote tumor cell migration and invasion.

Conclusions

Our study demonstrated that higher expression of KLK5 was significantly correlated with a poorer prognosis of GAC patients, implying the potential of KLK5 as a novel prognostic biomarker in GAC."xsd:string
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http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/author"Zhang W."xsd:string
http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/author"Xu X."xsd:string
http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/author"Zhao Y."xsd:string
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http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/author"Aihesan K."xsd:string
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http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/name"J Clin Lab Anal"xsd:string
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http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/title"Clinical significance of kallikrein 5 as a novel prognostic biomarker in gastric adenocarcinoma."xsd:string
http://purl.uniprot.org/citations/34510543http://purl.uniprot.org/core/volume"35"xsd:string
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