ABSTRACT
Wnt7a is a secreted glycoprotein that regulates normal cellular proliferation and differentiation as well as tumorigenesis and progression. The aim of this study was to investigate the expression and prognostic significance of Wnt7a in ovarian carcinoma. Wnt7a expression was immunohistochemically examined in normal ovaries (n=15), benign tumors (n=50) and ovarian carcinomas (n=78). The correlation of Wnt7a expression with clinicopathological parameters and survival was evaluated. Wnt7a expression was higher in ovarian carcinomas compared to normal ovaries and benign tumors (p<0.001 and p=0.001, respectively). Wnt7a positive expression was significantly correlated with serous subtype (p<0.001), elder age (p=0.017), advanced stage (p<0.001), high grade (p=0.001), a high degree of ascitic fluid volume (p=0.015) and high CA125 expression (p=0.025). Wnt7a was found to be a significant prognostic factor in univariate and multivariate analysis. High Wnt7a expression in ovarian cancer may be associated with poor prognosis.
Subject(s)
Ovarian Neoplasms/mortality , Wnt Proteins/analysis , Adult , Aged , Aged, 80 and over , Female , Humans , Immunohistochemistry , Middle Aged , Neoplasm Staging , Ovarian Neoplasms/chemistry , Ovarian Neoplasms/pathology , Prognosis , Wnt Proteins/physiologyABSTRACT
Comparative genomic hybridization (CGH) has been applied to detect recurrent chromosome alterations in 62 primary gastric carcinomas. Several nonrandom chromosomal changes, including gains of 8q (31 cases, 50%), 20q (29 cases, 47%) with a minimum gain region at 20q11. 2-q12, 13q (21 cases, 34%) with a minimum gain region at 13q22, and 3q (19 cases, 31%) were commonly observed. The regions most frequently lost included: 19p (23 cases, 37%), 17p (21 cases, 33%), and 1p (14 cases, 23%). High copy number gain (DNA sequence amplification) was detected in 6 cases. Amplification of 8q23-q24.2 and 20q11.2-q12 were observed in 3 cases. Gain of 20q and loss of 19p were confirmed by fluorescence in situ hybridization using corresponding bacterial artificial chromosomes (BAC) clones from those regions. The gain and loss of chromosomal regions identified in this study provide candidate regions involved in gastric tumorigenesis.