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Quantitative analysis of human kallikrein gene 14 expression in breast tumours indicates association with poor prognosis.
Br J Cancer 2002; 87(11):1287-93BJ

Abstract

KLK14 (formerly known as KLK-L6) is a recently identified member of the human kallikrein gene family. This family harbours several genes aberrantly expressed in various cancers as well as established (PSA/hK3, hK2) and potential (hK6, hK10) cancer markers. Similar to other kallikrein genes, KLK14 was found to be regulated by steroid hormones, particularly androgens and progestins, in breast and ovarian cancer cell lines. Preliminary studies indicated that KLK14 is differentially expressed in breast, ovarian, prostatic and testicular tumours. Given the above, we determined the prognostic significance of KLK14 expression in breast cancer. We studied KLK14 expression in 178 histologically confirmed epithelial breast carcinomas by quantitative reverse transcription-polymerase chain reaction and correlated with clinicopathological variables (tumour stage, grade, histotype etc.) and with outcome (disease-free survival and overall survival), monitored over a median of 76 months. KLK14 mRNA levels ranged from 0 to 1,219 arbitrary units in breast cancer tissues, with a mean+/-s.e. of 136+/-22. An optimal cutoff value of 40.5 arbitrary units was selected, to categorise tumours as KLK14-positive or negative. Higher concentrations of KLK14 mRNA were more frequently found in patients with advanced stage (III) disease (P=0.032). No statistically significant association was found between KLK14 and the other clinicopathological variables. KLK14 overexpression was found to be a significant predictor of decreased disease-free survival (hazard ratio of 2.31, P=0.001) and overall survival (hazard ratio of 2.21, P=0.005). Cox multivariate analysis indicated that KLK14 was an independent prognostic indicator of disease-free survival and overall survival. KLK14 also has independent prognostic value in subgroups of patients with a tumour size </=2 cm and positive nodal, oestrogen receptor and progestin receptor status. We conclude that KLK14 expression, as assessed by quantitative reverse transcription-polymerase chain reaction, is an independent marker of unfavourable prognosis for breast cancer.

Authors+Show Affiliations

Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12439719

Citation

Yousef, G M., et al. "Quantitative Analysis of Human Kallikrein Gene 14 Expression in Breast Tumours Indicates Association With Poor Prognosis." British Journal of Cancer, vol. 87, no. 11, 2002, pp. 1287-93.
Yousef GM, Borgoño CA, Scorilas A, et al. Quantitative analysis of human kallikrein gene 14 expression in breast tumours indicates association with poor prognosis. Br J Cancer. 2002;87(11):1287-93.
Yousef, G. M., Borgoño, C. A., Scorilas, A., Ponzone, R., Biglia, N., Iskander, L., ... Diamandis, E. P. (2002). Quantitative analysis of human kallikrein gene 14 expression in breast tumours indicates association with poor prognosis. British Journal of Cancer, 87(11), pp. 1287-93.
Yousef GM, et al. Quantitative Analysis of Human Kallikrein Gene 14 Expression in Breast Tumours Indicates Association With Poor Prognosis. Br J Cancer. 2002 Nov 18;87(11):1287-93. PubMed PMID: 12439719.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Quantitative analysis of human kallikrein gene 14 expression in breast tumours indicates association with poor prognosis. AU - Yousef,G M, AU - Borgoño,C A, AU - Scorilas,A, AU - Ponzone,R, AU - Biglia,N, AU - Iskander,L, AU - Polymeris,M-E, AU - Roagna,R, AU - Sismondi,P, AU - Diamandis,E P, PY - 2002/05/29/received PY - 2002/09/03/revised PY - 2002/09/04/accepted PY - 2002/11/20/pubmed PY - 2003/1/9/medline PY - 2002/11/20/entrez SP - 1287 EP - 93 JF - British journal of cancer JO - Br. J. Cancer VL - 87 IS - 11 N2 - KLK14 (formerly known as KLK-L6) is a recently identified member of the human kallikrein gene family. This family harbours several genes aberrantly expressed in various cancers as well as established (PSA/hK3, hK2) and potential (hK6, hK10) cancer markers. Similar to other kallikrein genes, KLK14 was found to be regulated by steroid hormones, particularly androgens and progestins, in breast and ovarian cancer cell lines. Preliminary studies indicated that KLK14 is differentially expressed in breast, ovarian, prostatic and testicular tumours. Given the above, we determined the prognostic significance of KLK14 expression in breast cancer. We studied KLK14 expression in 178 histologically confirmed epithelial breast carcinomas by quantitative reverse transcription-polymerase chain reaction and correlated with clinicopathological variables (tumour stage, grade, histotype etc.) and with outcome (disease-free survival and overall survival), monitored over a median of 76 months. KLK14 mRNA levels ranged from 0 to 1,219 arbitrary units in breast cancer tissues, with a mean+/-s.e. of 136+/-22. An optimal cutoff value of 40.5 arbitrary units was selected, to categorise tumours as KLK14-positive or negative. Higher concentrations of KLK14 mRNA were more frequently found in patients with advanced stage (III) disease (P=0.032). No statistically significant association was found between KLK14 and the other clinicopathological variables. KLK14 overexpression was found to be a significant predictor of decreased disease-free survival (hazard ratio of 2.31, P=0.001) and overall survival (hazard ratio of 2.21, P=0.005). Cox multivariate analysis indicated that KLK14 was an independent prognostic indicator of disease-free survival and overall survival. KLK14 also has independent prognostic value in subgroups of patients with a tumour size </=2 cm and positive nodal, oestrogen receptor and progestin receptor status. We conclude that KLK14 expression, as assessed by quantitative reverse transcription-polymerase chain reaction, is an independent marker of unfavourable prognosis for breast cancer. SN - 0007-0920 UR - https://www.unboundmedicine.com/medline/citation/12439719/Quantitative_analysis_of_human_kallikrein_gene_14_expression_in_breast_tumours_indicates_association_with_poor_prognosis_ DB - PRIME DP - Unbound Medicine ER -