Endocrine Abstracts

Antiprogestine mifepristone (MF) has been shown to inhibit ovarian epithelial cancer (OEC) cell growth in vitro and in vivo. Recent clinical trials with MF for human OEC were unsuccessful, for unknown reasons. Progesterone (P4) is believed to have preventive measures towards breast, endometrial or hOEC cancers. Hereby we analyzed the effects of P4 and MF on ovarian granulosa cell tumorigenesis (GCT) in vitro and in vivo...

Prepubertally gonadectomized (GDX) wild-type DBA/2J mice develop adrenocortical neoplasms presenting with small spindle-shaped non steroidogenic A-cells and large lipid-laden, steroidogenic and mitotically active B-cells. Neoplastic B-cells overexpress estrogen receptor α (ERα, Ers1) and β (ERβ, Ers2), aromatase (CYP19a1) and produce sex-steroids, resembling gonadal rest tissue. To test the role of estrogen-ER system in adrenocortical tumor progression, GDX...

Adrenocortical tumorigenesis in prepubertally gonadectomized (GDX) DBA/2J mice has been attributed to chronically elevated luteinizing hormone (LH) and ectopic expression of luteinizing hormone receptor (LHCGR) and GATA-4 transcription factor. We analyzed now the mechanistic role of LH-LHCGR activation in GDX-induced adrenocortical tumorigenesis in intact and ovariectomized (OVX) wild-type (WT) and Lhcgr-/- mice in the DBA/2J genetic background mice, or by ...