Tumor Biology

, Volume 37, Issue 1, pp 437–446 | Cite as

Prognostic significance of human tissue kallikrein-related peptidases 11 and 15 in gastric cancer

  • David L. Kolin
  • Keiyan Sy
  • Fabio Rotondo
  • Mena N. Bassily
  • Kalman Kovacs
  • Christine Brezden-Masley
  • Catherine J. Streutker
  • George M. Yousef
Original Article


Human tissue kallikrein-related peptidases (KLK) are a group of 15 serine proteases which have been investigated as potential cancer biomarkers. This study determined the prognostic significance of KLK 11 and 15 expression levels in gastric carcinoma specimens. Expression of KLK11 and KLK15 was assessed by immunohistochemistry staining on a tissue microarray constructed from 113 gastrectomy specimens from patients with gastric carcinoma. To minimize inter-observer variability, expression levels were quantified using an automated algorithm. Epithelial and stromal staining were assessed separately. Both KLK11 and KLK15 were expressed in gastric carcinoma. There was no significant correlation between either KLK11 or KLK15 expression and the presence of lymph node metastases or Lauren classification (intestinal vs. diffuse). Higher levels of KLK11 expression in gastric carcinoma were associated with significantly worse overall survival (p = 0.008), and a multivariate analysis showed that it had prognostic value independent of tumor stage and differentiation (p = 0.004). Variations in KLK15 expression were not significantly associated with prognosis. KLK11 shows promise as a potential independent prognostic marker for gastric carcinoma.


Gastric cancer Kallikreins KLK11 KLK15 Tumor markers Personalized medicine 



This work was supported by grants from the Kidney Foundation of Canada, the Kidney Cancer Research Network of Canada, Prostate Cancer Canada, and the Canadian Institute of Health Research.

Conflict of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • David L. Kolin
    • 1
    • 2
  • Keiyan Sy
    • 3
  • Fabio Rotondo
    • 1
  • Mena N. Bassily
    • 4
  • Kalman Kovacs
    • 1
  • Christine Brezden-Masley
    • 5
  • Catherine J. Streutker
    • 1
    • 2
  • George M. Yousef
    • 1
    • 2
    • 6
  1. 1.Department of Laboratory Medicine and the Keenan Research Centre for Biomedical Science of St. Michael’s HospitalTorontoCanada
  2. 2.Department of Laboratory Medicine and PathobiologyUniversity of TorontoTorontoCanada
  3. 3.Department of PathologyCredit Valley HospitalMississaugaCanada
  4. 4.Department of Community Medicine and Public HealthMenoufiya UniversityShebeen el komEgypt
  5. 5.Department of Medicine and Hematology-OncologySt. Michael’s HospitalTorontoCanada
  6. 6.Department of Laboratory MedicineSt. Michael’s HospitalTorontoCanada

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