Kallikrein-Related Peptidase mRNA Expression in Adenoid Cystic Carcinoma of Salivary Glands: A Polymerase Chain Reaction Study
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Kallikrein-related peptidases (KLKs) are a group of 15 serine proteases implicated in a variety of biological processes. Aberrant expression of KLKs has been associated with the development of certain cancers. However, the role of KLKs in salivary tumors has not been extensively studied. This study evaluated the expression of KLKs in both adenoid cystic carcinoma (ACC) and normal salivary gland tissue. We isolated total RNA from 39 formalin-fixed, paraffin-embedded samples, which included 24 ACCs and 15 normal salivary gland tissues. Complementary DNA, synthesized by reverse transcription, was combined with gene specific kallikrein primers (KLK1–KLK15) to allow for quantitative real-time PCR. Data was normalized to a β-actin housekeeping gene. Relative quantification analysis was performed using the ΔCq method. KLK1–KLK15 expression was observed in both tissue types. However, KLK1, KLK8, KLK11, and KLK14 were found to be downregulated in ACC. We propose that this may represent a multi-parametric panel providing diagnostic and prognostic information.
KeywordsKallikreins Serine protease Adenoid cystic carcinoma RT-PCR Gene expression
This study was partially funded by the Canadian Association of Oral and Maxillofacial Surgeons.
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the Western University Research Ethics Board, Study Number 103783 and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
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