Identification of a novel gene with increasing rate of suppression in high grade prostate cancers.
Prostate cancer is the second leading cause of cancer-related deaths in the United States. However, the underlying molecular events for prostate cancer development are not clear. In this study, we applied the recently developed technology known as differential subtraction chain (DSC) to identify a novel gene whose expression is inactivated in high grade prostate cancer. This gene, designated as SAPC, is expressed in normal prostate acinar cells. Its expression is dramatically down-regulated in high grade prostate cancers (4/4) but is unaltered in low grade prostate cancers. It encodes a 7.7-kd protein. Its sequence shares some homology with the cysteine-rich domain of 2-5A-dependent RNase L, which is a critical component of the interferon-induced apoptosis cascade. The selective inactivation in the more aggressive prostate cancers holds promise for SAPC as a potential prognostic marker for high grade prostate cancer.
Yu
Y P
YP
Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA.
Lin
F
F
Bisceglia
M
M
Krill
D
D
Dhir
R
R
Becich
M
M
Luo
J H
JH
D000595:Amino Acid Sequence; D001483:Base Sequence; D015152:Blotting, Northern; D003001:Cloning, Molecular / Q000379:methods; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D004722:Endoribonucleases / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D017403:In Situ Hybridization; D008297:Male; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins; D009367:Neoplasm Staging; D011471:Prostatic Neoplasms / Q000235:genetics* / Q000473:pathology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA; D014018:Tissue Distribution
D018076:DNA, Complementary; D009363:Neoplasm Proteins; D012333:RNA, Messenger; D004722:Endoribonucleases; C420245:SAPC protein, human