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Human kallikrein gene 5 (KLK5) expression is an indicator of poor prognosis in ovarian cancer.
Br J Cancer. 2001 Mar 02; 84(5):643-50.BJ

Abstract

Kallikrein gene 5 (KLK5, also known as KLK-L2), located on chromosome 19q13.4, is one of the newly identified members of the kallikrein gene family, which is a subgroup of the serine protease enzyme family. In normal human tissues, KLK5 is highly expressed in skin, mammary gland and testis. Preliminary RT-PCR analysis has indicated that KLK5 is expressed in a subset of ovarian tumours. We have thus hypothesized that KLK5 may be a new prognostic indicator in ovarian cancer. We have examined the mRNA expression of KLK5 in 142 malignant ovarian tissues. Tumours were pulverized, total RNA was extracted, and cDNA was prepared by reverse transcription. KLK5 was amplified by PCR using gene specific primers, and the identity of the PCR product was verified by sequencing. Ovarian tissues were then classified as KLK5 positive or negative, based on ethidium bromide staining of the PCR product on agarose gels. KLK5 was found to be highly expressed in 58/142 (41%) of ovarian cancer samples while its level of expression was very low in normal ovarian tissues. We found a strong positive relation between KLK5 expression and tumour grade (P = 0.006) and disease stage (P = 0.027). Univariate survival analysis revealed that patients with ovarian tumours positive for KLK5 expression had an increased risk for relapse and death (P = 0.018 and 0.022, respectively). In multivariate analysis, KLK5 expression showed independent prognostic value only in the subset of tumours with lower grade disease (grades I and II). We conclude that KLK5 expression is associated with more aggressive forms of epithelial ovarian carcinoma and has indepdent prognostic value in low grade tumours.

Authors+Show Affiliations

Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, 600 University Ave, Toronto, M5G 1X5, 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 available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

11237385

Citation

Kim, H, et al. "Human Kallikrein Gene 5 (KLK5) Expression Is an Indicator of Poor Prognosis in Ovarian Cancer." British Journal of Cancer, vol. 84, no. 5, 2001, pp. 643-50.
Kim H, Scorilas A, Katsaros D, et al. Human kallikrein gene 5 (KLK5) expression is an indicator of poor prognosis in ovarian cancer. Br J Cancer. 2001;84(5):643-50.
Kim, H., Scorilas, A., Katsaros, D., Yousef, G. M., Massobrio, M., Fracchioli, S., Piccinno, R., Gordini, G., & Diamandis, E. P. (2001). Human kallikrein gene 5 (KLK5) expression is an indicator of poor prognosis in ovarian cancer. British Journal of Cancer, 84(5), 643-50.
Kim H, et al. Human Kallikrein Gene 5 (KLK5) Expression Is an Indicator of Poor Prognosis in Ovarian Cancer. Br J Cancer. 2001 Mar 2;84(5):643-50. PubMed PMID: 11237385.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Human kallikrein gene 5 (KLK5) expression is an indicator of poor prognosis in ovarian cancer. AU - Kim,H, AU - Scorilas,A, AU - Katsaros,D, AU - Yousef,G M, AU - Massobrio,M, AU - Fracchioli,S, AU - Piccinno,R, AU - Gordini,G, AU - Diamandis,E P, PY - 2001/3/10/pubmed PY - 2001/4/21/medline PY - 2001/3/10/entrez SP - 643 EP - 50 JF - British journal of cancer JO - Br. J. Cancer VL - 84 IS - 5 N2 - Kallikrein gene 5 (KLK5, also known as KLK-L2), located on chromosome 19q13.4, is one of the newly identified members of the kallikrein gene family, which is a subgroup of the serine protease enzyme family. In normal human tissues, KLK5 is highly expressed in skin, mammary gland and testis. Preliminary RT-PCR analysis has indicated that KLK5 is expressed in a subset of ovarian tumours. We have thus hypothesized that KLK5 may be a new prognostic indicator in ovarian cancer. We have examined the mRNA expression of KLK5 in 142 malignant ovarian tissues. Tumours were pulverized, total RNA was extracted, and cDNA was prepared by reverse transcription. KLK5 was amplified by PCR using gene specific primers, and the identity of the PCR product was verified by sequencing. Ovarian tissues were then classified as KLK5 positive or negative, based on ethidium bromide staining of the PCR product on agarose gels. KLK5 was found to be highly expressed in 58/142 (41%) of ovarian cancer samples while its level of expression was very low in normal ovarian tissues. We found a strong positive relation between KLK5 expression and tumour grade (P = 0.006) and disease stage (P = 0.027). Univariate survival analysis revealed that patients with ovarian tumours positive for KLK5 expression had an increased risk for relapse and death (P = 0.018 and 0.022, respectively). In multivariate analysis, KLK5 expression showed independent prognostic value only in the subset of tumours with lower grade disease (grades I and II). We conclude that KLK5 expression is associated with more aggressive forms of epithelial ovarian carcinoma and has indepdent prognostic value in low grade tumours. SN - 0007-0920 UR - https://www.unboundmedicine.com/medline/citation/11237385/Human_kallikrein_gene_5__KLK5__expression_is_an_indicator_of_poor_prognosis_in_ovarian_cancer_ L2 - http://dx.doi.org/10.1054/bjoc.2000.1649 DB - PRIME DP - Unbound Medicine ER -