title: Quantitative RT-PCR analysis and immunohistochemical localization of the kallikrein-related peptidases 13 and 14 in lung.
abstract: Expression of the KLK13 and KLK14 genes was examined at the mRNA and protein levels in a cohort of 57 patients with non-small-cell lung cancer (NSCLC). The mRNA levels, assessed by real-time RT-PCR, were significantly different in malignant tissues compared to adjacent non-malignant tissues (KLK13, p=0.006; KLK14, p=0.022). KLK13 and KLK14 mRNA overexpression in tumors (1/3 of the patients) was associated with a positive nodal status in multivariate analysis (p=0.018 and p=0.069, respectively). KLK13 and KLK14 were localized in the cytoplasm of epithelial cells of normal bronchus and NSCLC, as determined by immunohistochemistry. Moreover, positive staining was significantly associated with adenocarcinoma histotype (KLK13, p=0.014) and tumor size (KLK14, p=0.048). Although the results are marginally significant, patients with high KLK13 expression at the mRNA or protein level had lower overall survival.
authors.affiliation: INSERM U618 Protéases et Vectorisation Pulmonaires, Faculté de Médecine, F-37000 Tours, France.
authors.forename: Chris
authors.initials: C
authors.lastname: Planque
authors.forename: Claire
authors.initials: C
authors.lastname: Bléchet
authors.forename: Aida
authors.initials: A
authors.lastname: Ayadi-Kaddour
authors.forename: Nathalie
authors.initials: N
authors.lastname: Heuzé-Vourc'h
authors.forename: Pascal
authors.initials: P
authors.lastname: Dumont
authors.forename: Serge
authors.initials: S
authors.lastname: Guyétant
authors.forename: Eleftherios P
authors.initials: EP
authors.lastname: Diamandis
authors.forename: Faouzi
authors.initials: F
authors.lastname: El Mezni
authors.forename: Yves
authors.initials: Y
authors.lastname: Courty
mesh_terms: D045744:Cell Line, Tumor; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D007610:Kallikreins / Q000235:genetics* / Q000378:metabolism*; D008168:Lung / Q000201:enzymology* / Q000378:metabolism / Q000473:pathology; D008175:Lung Neoplasms / Q000201:enzymology / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D012333:RNA, Messenger; C470778:KLK13 protein, human; C425336:KLK14 protein, human; D007610:Kallikreins