Regulation of Sterol Regulatory Element-Binding Transcription Factor 1a by Human Chorionic Gonadotropin and Insulin in Cultured Rat Theca-Interstitial Cells1
نویسندگان
چکیده
منابع مشابه
Expression of low density lipoprotein receptor in cultured human granulosa cells: regulation by human chorionic gonadotropin, cyclic AMP, and sterol.
Steroidogenic cells utilize lipoprotein-delivered cholesterol as a primary substrate for hormone synthesis. We studied low density lipoprotein (LDL) receptors in cultured human granulosa cells to determine what factors regulate receptor expression. Granulosa cells cultured under serum-free conditions were treated with human chorionic gonadotropin (hCG) for 1.5 to 14 hr. The LDL receptor content...
متن کاملSynergistic activation of transcription by nuclear factor Y and sterol regulatory element binding protein.
The current studies define the role of three distinct cis-elements in the proximal promoter of the rat farnesyl diphosphate (FPP) synthase gene. The three cis-elements, a sterol regulatory element 3 (SRE-3) flanked by an ATTGG motif (inverted CCAAT box), and a CCAAT box, form a sterol regulatory unit that is necessary and sufficient for sterol-regulated expression of FPP synthase promoter-repor...
متن کاملInsulin-like growth factor-I enhances luteinizing hormone binding to rat ovarian theca-interstitial cells.
We tested the hypothesis that insulin-like growth factor-I (IGF-I) stimulates ovarian androgen production by increasing theca-interstitial cell luteinizing hormone (LH) binding affinity and/or binding capacity. We then investigated the role of transcriptional and translational events in mediating these actions of IGF-I. LH bound to saturable, high affinity binding sites on rat ovarian theca-int...
متن کاملNew perspectives in the regulation of hepatic glycolytic and lipogenic genes by insulin and glucose: a role for the transcription factor sterol regulatory element binding protein-1c.
The regulation of hepatic glucose metabolism has a key role in whole-body energy metabolism, since the liver is able to store (glycogen synthesis, lipogenesis) and to produce (glycogenolysis, gluconeogenesis) glucose. These pathways are regulated at several levels, including a transcriptional level, since many of the metabolism-related genes are expressed according to the quantity and quality o...
متن کاملIdentification of specific high density lipoprotein-binding sites in rat testis and regulation of binding by human chorionic gonadotropin.
Freshly prepared rat testicular membranes bind iodinated rat high density lipoprotein (HDL) with high affinity (Kd = 32 microgram of HDL protein/ml). This high density lipoprotein binding differs from low density lipoprotein binding by cultured human fibroblast cells in two ways; it is not affected by Ca2+ or ethylenediaminetetraacetic acid, and it is not sensitive to pronase and trypsin. Testi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 2009
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod.108.074351