Abstract:
:After the luteinizing hormone (LH) surge, the cells that remain from the ovulated follicle undergo a process of differentiation termed luteinization. Two key features of the cells after luteinization are the capacity for tremendous production of progesterone [10(16) molecules of progesterone per (min/(g of CL))] and the capacity to undergo regression or death of the cells at the appropriate time. There are two steroidogenic cell types, the small and large luteal cells that are regulated by different mechanisms. In small luteal cells, production of progesterone is stimulated by LH through the protein kinase A (PKA) pathway. The large luteal cells of ruminants produce large quantities of progesterone that is independent of LH stimulation. Although luteotrophins clearly regulate luteal function, much of luteal progesterone production in some species appears to be constitutive, consistent with the autonomous aspects of the large luteal cell. The key regulated step in luteal progesterone production appears to be regulation of transport of cholesterol to the inner mitochondrial membrane apparently mediated by the steroidogenic acute regulatory protein (StAR). In addition, our recent research indicates that PKA is tonically active in large luteal cells and this may be responsible for the high, relatively autonomous nature of luteal progesterone production. Regression of the corpus luteum (CL) in many species is initiated by prostaglandin (PG) F2alpha secreted from the uterus. Luteal cells also have the capacity for production of PGF2alpha. Luteal PGF2alpha production can be regulated by a variety of substances including inhibition by progesterone and stimulation by cytokines. We have also characterized a positive feedback pathway in ruminant and porcine CL in which small amounts of uterine PGF(2alpha) stimulate intraluteal production of PGF2alpha due to induction of the cycloxygenase-2 (Cox-2) enzyme in large luteal cells. This positive feedback pathway is only present in CL that has acquired the capacity for luteal regression ( approximately day 7 in cow, approximately day 13 in pig). Regulation by protein kinase C (PKC) of transcriptional factors interacting with an E-box in the 5' flanking region of the Cox-2 gene is the critical regulatory element involved in this positive feedback pathway. Thus, luteinization in some species appears to change specific gene transcription such that progesterone production becomes relatively independent of acute luteotrophic regulation and intraluteal PGF2alpha synthesis is induced by the second messenger pathways that are activated by PGF2alpha.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Diaz FJ,Anderson LE,Wu YL,Rabot A,Tsai SJ,Wiltbank MCdoi
10.1016/s0303-7207(02)00056-4keywords:
subject
Has Abstractpub_date
2002-05-31 00:00:00pages
65-80issue
1eissn
0303-7207issn
1872-8057pii
S0303720702000564journal_volume
191pub_type
杂志文章,评审abstract::Mammalian gonadotropins are highly selective. Charge differences between the Cys(10-11) sequence of FSHbeta and LHbeta/CGbeta seat-belt loops determine the ability of these hormones to interact with the LH-R. Selective FSH-R binding is mainly dependent on the presence of an FSHbeta-specific sequence between Cys(11-12)...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2004.06.011
更新日期:2004-09-30 00:00:00
abstract::Recently, the structures of two forms of inhibin present in human follicular fluid were elucidated from the corresponding cDNA sequences. Using specific antisera generated against the alpha-chain common to both forms, we have examined the cellular localization of inhibin in the male and female rat gonads and in human ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(87)90162-6
更新日期:1987-12-01 00:00:00
abstract::The chum salmon insulin-like growth factor II (IGF-II) gene is highly expressed in liver tissue. In this study we demonstrate that two transcription factors, Sp1 and C/EBPbeta, are involved in the enhanced expression of the salmon IGF-II gene. The presence of the fish homolog for C/EBPbeta in salmon liver RNA was conf...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(00)00381-6
更新日期:2001-02-14 00:00:00
abstract::It has been reported that testicular Sertoli cells can be induced to synthesize the steroidogenic acute regulatory (StAR) protein. StAR mediates the rate-limiting step of steroidogenesis, which is the transfer of cholesterol to the inner mitochondrial membrane. Since Sertoli cells are thought to be unable to utilize c...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(99)00155-0
更新日期:1999-11-25 00:00:00
abstract::Many genes that are required for fertility have been identified in model organisms (). Mutations in these genes cause infertility due to defects in development of the germ cell lineage, but the organism is otherwise healthy. Although human reproduction is undoubtedly as complex as that of other organisms, very few fer...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/s0303-7207(01)00646-3
更新日期:2001-11-26 00:00:00
abstract::The phorbol ester 12-O-tetradecanoylphorbol 13-acetate (TPA) is a potent activator of protein kinase C (PKC) and is known to affect a variety of biochemical processes in human breast cancer cells. In the present study we have employed MCF-7 cells to investigate the effects of TPA on inositol lipid signalling, the puta...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(92)90260-d
更新日期:1992-06-01 00:00:00
abstract::Endometriosis causes pelvic pain and infertility in women of reproductive age. We explored TNFalpha-induced specific signaling pathways and gene expressions in endometriotic stromal cells (ESCs). Based on the data of the pathway specific cDNA array, we analyzed the role of TAK1, which is believed to work as a common m...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2009.04.012
更新日期:2009-08-13 00:00:00
abstract::The adrenal cortex functions to produce steroid hormones necessary for life. To maintain its functional capacity throughout life, the adrenal cortex must be continually replenished and rapidly repaired following injury. Moreover, the adrenal responds to endocrine-mediated organismal needs, which are highly dynamic and...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2020.111043
更新日期:2021-01-01 00:00:00
abstract::The present study investigated the pattern and site of expression of the prolactin receptor gene in the testis of the seasonally breeding Soay sheep. In experiment 1, Northern blot analysis confirmed expression of the prolactin receptor gene in the testis which was encoded by RNA transcripts of approximately 3.6, 11.2...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(98)00220-2
更新日期:1999-02-25 00:00:00
abstract::In the extracellular space, the gonadotropin-releasing hormone (GnRH) is metabolized by the zinc metalloendopeptidase EC3.4.24.15 (EP24.15) to form the pentapeptide, GnRH-(1-5). GnRH-(1-5) diverges in function and mechanism of action from GnRH in the brain and periphery. GnRH-(1-5) acts on the orphan G protein-coupled...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2015.08.010
更新日期:2015-11-05 00:00:00
abstract::The major source for dehydroepiandrosterone (DHEA) and its sulphate compound DHEA-S is the inner zone of the adrenal cortex, which is in direct contact to adrenomedullary chromaffin cells. Due to their close proximity, direct interactions of DHEA and DHEA-S with chromaffin cells during adrenal gland development and th...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2008.10.026
更新日期:2009-03-05 00:00:00
abstract::We have used plus-minus hybridization to identify Xenopus liver cDNA clones of mRNAs whose levels are regulated by estrogen. One clone identified in this way was shown to be a nearly full-length cDNA clone of the mRNA coding for a small 22 000 dalton estrogen-inducible serum protein (EISP). Quantitation of EISP mRNA l...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(85)90124-8
更新日期:1985-02-01 00:00:00
abstract::Renal hypertrophy and hyperfiltration are early manifestations of human and experimental diabetes that may contribute to the late development of diabetic nephropathy. The biochemical events resulting in kidney growth in the diabetic state are completely unknown. Since growth of various tissues is accompanied by increa...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(92)90176-7
更新日期:1992-07-01 00:00:00
abstract::The androgen receptor (AR), which mediates androgen action in the cell, belongs to the superfamily of nuclear receptors, a large group of transcription factors. Recent studies have described how the AR acts on specific target genes. The receptor's specificity of action depends on its regulation at different levels: ex...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/s0303-7207(02)00364-7
更新日期:2002-12-30 00:00:00
abstract::A rapid and sensitive assay of iodothyronine-5'-monodeiodinase (5'-D) was developed using Sephadex column chromatography for separation of substrate 125I-rT3 from the product free 125I-. The distribution of 5'-D activity on rat kidney cortex cell membranes was examined in isopycnic zonal centrifugation experiments usi...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(88)90013-5
更新日期:1988-03-01 00:00:00
abstract::Cells isolated enzymically from seminal vesicles and epididymides of normal and castrated rats were shown by electron microscopy to be intact and representative of the tissue. The cells synthesize and secrete tissue-specific proteins. Short-term incorporation of [3H]uridine and [35S]methionine was measured to determin...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(81)90071-x
更新日期:1981-08-01 00:00:00
abstract::Receptors for calcitriol are described in human decidua. They exhibit a dissociation constant of 35 +/- 6 pM and they are at concentrations similar to those found in other tissues (0.45 +/- 0.04 fmol/micrograms DNA). They are highly specific for calcitriol since neither of the other vitamin D3 derivatives nor the ster...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(90)90023-2
更新日期:1990-07-09 00:00:00
abstract::The direct inhibitory of gonadotropin-releasing hormone (GnRH) upon testicular androgen production was studied in cultured testicular cells. Enzyme-dispersed testicular cells from immature hypophysectomized rats were cultured for 6 days in a serum-free medium with or without various hormones. Culture media were change...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(81)90029-0
更新日期:1981-01-01 00:00:00
abstract::When Sertoli cell-enriched cultures derived from 19-day-old Wistar rats are exposed to FSH or L-isoproterenol, cAMP accumulates in the medium. Previous contact of cultured cells with either one of these agents results in a reversible state of desensitization. During secondary stimulation up to 20 times less cAMP accum...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(80)90075-1
更新日期:1980-11-01 00:00:00
abstract::Marsupials are a group of mammals that are under-exploited, in particular in developmental and evolutionary studies of biological systems. In this review, the roles that marsupials have played in elucidating the evolution of thyroid hormone distribution systems are summarised. Marsupials are born at very early develop...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2008.04.002
更新日期:2008-10-10 00:00:00
abstract::Non-alcoholic fatty liver disease (NAFLD) is associated with hepatic insulin resistance with the molecular basis of this association being not well understood. Here we studied the effect of hepatic triglyceride accumulation induced by postprandial triglyceride-rich lipoproteins (TGRL) on hepatic insulin sensitivity in...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2011.06.008
更新日期:2011-08-22 00:00:00
abstract::The protein kinase C (PKC) activator, phorbol 12,13-dibutyrate (PDBu) induced the release of both luteinizing hormone (LH) and growth hormone (GH) from proestrous rat anterior pituitary pieces in vitro. Phorbol 12,13-dibutyrate-induced LH, but not GH release was readily inhibited by the phospholipase A2 (PLA2) inhibit...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(93)90031-e
更新日期:1993-09-01 00:00:00
abstract::The molecular cloning and nucleotide sequencing of the gonadotropin-releasing hormone (GnRH) receptor represented an enhanced step in the experimental effort to understand this key molecule in the reproductive process at a cell and molecular level. A subsequent step in this broad effort is heterologous expression of t...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(96)04003-8
更新日期:1997-03-28 00:00:00
abstract::The interaction of indomethacin with the antilipolytic effect of prostaglandin E2 (PGE2) was investigated in rat adipocytes in order to reveal a possible role of endogenous PGs in adipose tissue. Adipocytes isolated from rats treated in vivo for 5 days with indomethacin were compared with non-treated control rats. The...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(88)90056-1
更新日期:1988-07-01 00:00:00
abstract::Galectin-1 is highly expressed in blastocysts and trophoblast giant cells during implantation, and dysregulated galectin-1 is associated with many pregnancy-related abnormalities. Elevated galectin-1 contributes to cancer cells invasion. Here, we found that galectin-1 is expressed in mouse oocytes, preimplantation emb...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2017.11.003
更新日期:2018-07-15 00:00:00
abstract::Transforming growth factor beta (TGF beta) caused a dose-dependent increase in both basal and follicle-stimulating hormone (FSH)-stimulated inhibin production by rat granulosa cells in culture. The TGF beta dose-response curve in the absence of FSH was approximately parallel to that in the presence of either a minimal...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(88)90150-5
更新日期:1988-08-01 00:00:00
abstract::Nitroblue tetrazolium (NBT) has been widely used to demonstrate redox systems, particularly in phagocytizing polymorphonuclear leukocytes. Based on the striking similarities between redox metabolism in leukocytes and in the thyroid, we studied NBT reduction by microscopic techniques and NBT effects in thyroid metaboli...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(82)90004-1
更新日期:1982-04-01 00:00:00
abstract::The rate of dissociation of recombinant, purified human estrogen receptor alpha (ERalpha) from a fluorescein-labeled DNA containing the consensus vitellogenin ERE sequence (F-vitERE) was determined in real time using fluorescence anisotropy. The complex of estradiol-occupied ERalpha with F-vitERE had an apparent disso...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(01)00395-1
更新日期:2001-04-25 00:00:00
abstract::Bisphenol A (BPA) is widely used in consumer products and a potential endocrine disruptor linked with sexual precocity. However, its action and underlying mechanisms on male sexual maturation is unclear. In the present study, we used a unique in vivo ethane dimethane sulfonate (EDS)-induced Leydig cell regeneration mo...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2018.03.003
更新日期:2018-10-15 00:00:00
abstract::To determine if the hormonal effects on insulin-like growth factor binding protein (IGFBP) production differed between granulosa and thecal cells, both cell types were collected and cultured in serum-free medium with various hormone treatments, arranged in three experiments. Following treatment, cells were enumerated ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(01)00541-x
更新日期:2001-08-20 00:00:00