Overexpression of kallikrein 10 in epithelial ovarian carcinomas.

Abstract:

OBJECTIVE:We wanted to identify genes up-regulated in ovarian tumors that might serve as early markers for ovarian cancer. One promising focus is the family of genes that encode secreted proteases, which play essential roles in tumor invasion and metastasis. Kallikrein 10 (KLK10) is a member of the kallikrein family of serine proteases which include 15 proteins, including the prostate-specific antigen (PSA), also known as hK3. We investigated whether KLK10 and its related protein, hK10, might serve as equally accurate markers for ovarian carcinoma. METHODS:Transcriptional profiling was performed using RNA isolated from normal ovarian epithelium, ovarian cancer cell lines, and primary ovarian tumors. Microarray data were confirmed by Northern blot analysis of 66 ovarian tumor samples and 6 ovarian cancer cell lines. In situ hybridization and Western blot analysis confirmed the Northern blot findings. RESULTS:KLK10 was more highly expressed by primary ovarian tumors than by NOE. Thirty-two of 35 primary serous ovarian carcinoma samples (91.4%) expressed higher levels of KLK10 than NOE did. Eleven of 15 nonserous epithelial ovarian carcinoma samples (73.3%) and 8 of 11 primary peritoneal carcinoma samples (72.7%) also expressed KLK10. Overall, 84.8% of all epithelial ovarian and peritoneal carcinoma tumor samples showed elevated expression of KLK10. Similarly, Western blot analysis demonstrated that levels of the KLK10-related protein, designated hK10, are elevated in primary ovarian tissue lysates, but the protein is undetectable in immortalized ovarian epithelium. Finally, in situ hybridization established that KLK10 mRNA is much more highly expressed by tumor tissue than by normal epithelium and stromal tissues. CONCLUSIONS:Our data support recent immunoassay findings of elevated levels of hK10 in the tumor tissue and serum of ovarian cancer patients. Thus, it is likely that KLK10 and other kallikreins will serve as useful diagnostic and prognostic markers in patients with ovarian carcinoma.

journal_name

Gynecol Oncol

journal_title

Gynecologic oncology

authors

Shvartsman HS,Lu KH,Lee J,Lillie J,Deavers MT,Clifford S,Wolf JK,Mills GB,Bast RC Jr,Gershenson DM,Schmandt R

doi

10.1016/s0090-8258(03)00257-9

subject

Has Abstract

pub_date

2003-07-01 00:00:00

pages

44-50

issue

1

eissn

0090-8258

issn

1095-6859

pii

S0090825803002579

journal_volume

90

pub_type

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