24 research outputs found
528 RE-CLASSIFICATION STRATEGIES IN MEN WITH LOW RISK PROSTATE CANCER: TRUS GUIDED BIOPSY VERSUS TEMPLATE PROSTATE MAPPING
The metastatic potential of prostate carcinomas composed entirely of single malignant glands
Comparison of proliferating cell nuclear antigen immunostaining in lymph node metastases and primary prostate adenocarcinoma after neoadjuvant androgen deprivation therapy
Beyond transrectal ultrasound-guided prostate biopsies: available techniques and approaches
Testis-specific protein on Y chromosome (TSPY) represses the activity of the androgen receptor in androgen-dependent testicular germ-cell tumors
Testis-specific protein on Y chromosome (TSPY) is an ampliconic gene on the Y chromosome, and genetic interaction with gonadoblastoma has been clinically established. However, the function of the TSPY protein remains to be characterized in physiological and pathological settings. In the present study, we observed coexpression of TSPY and the androgen receptor (AR) in testicular germ-cell tumors (TGCTs) in patients as well as in model cell lines, but such coexpression was not seen in normal testis of humans or mice. TSPY was a repressor for androgen signaling because of its trapping of cytosolic AR even in the presence of androgen. Androgen treatment stimulated cell proliferation of a TGCT model cell line, and TSPY potently attenuated androgen-dependent cell growth. Together with the finding that TSPY expression is reduced in more malignant TGCTs in vivo, the present study suggests that TSPY serves as a repressor in androgen-induced tumor development in TGCTs and raises the possibility that TSPY could be used as a clinical marker to assess the malignancy of TGCTs