Abstract:
:While the transcriptional effects of glucocorticoid hormone manipulation on the pituitary pro-opiomelanocortin (POMC) gene have been documented, it is not yet clear whether glucocorticoids activate additional post-transcriptional mechanisms to regulate POMC gene expression. We have used RNA probes that span exon/intron junctions in sensitive nuclease protection assays in order to examine changes in POMC precursor RNA as well as mature mRNA in nucleus and cytoplasm following both adrenalectomy (ADX) and administration of exogenous glucocorticoids. ADX led to a rapid and sustained 8- to 10-fold increase in the level of POMC primary transcript in the anterior lobe (AL), from 1 to 14 days after ADX. Stimulation of mature POMC mRNA in the nucleus was also rapid, with 7- to 8-fold increases evident by 1 day after ADX. In sharp contrast, the time-dependent accumulation of POMC mRNA in the cytoplasm was slow in comparison, reaching levels approximately 2-fold higher than sham-operated animals by 1 day post-ADX and 12-fold higher by 14 days after ADX. Despite the constant elevated level of nuclear POMC precursor RNA, the rate of accumulation of POMC mRNA in the corticotroph cytoplasm after ADX was not linear, with the greatest increase occurring within the first 1-4 days post-ADX. This led to alterations in the molar ratio of POMC primary transcript: nuclear mRNA: cytoplasmic mRNA in the AL at 1 and 4 days after ADX and showed a relative increase in the proportion of POMC RNA transcripts within the nucleus. Acute administration of dexamethasone to ADX rats resulted in rapid 80-90% inhibition of POMC primary transcript levels in the AL that was maximal by 30 min but with no associated change in mature mRNA. No significant changes in POMC RNA were seen in neurointermediate lobe in any of these studies. These studies suggest that following ADX, time-dependent alterations in nuclear transport of mature POMC mRNA and/or changes in POMC mRNA stability, in addition to changes in gene transcription may account for the overall level of POMC mRNA expressed in the AL. Furthermore, we have illustrated the use of exon/intron probes for accurately quantitating rapid alterations in steady-state levels of nuclear precursor RNA that may reflect transcriptional responses and/or changes in post-transcriptional processing of the primary transcript.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Autelitano DJ,Blum M,Roberts JLdoi
10.1016/0303-7207(89)90029-4subject
Has Abstractpub_date
1989-10-01 00:00:00pages
171-80issue
2eissn
0303-7207issn
1872-8057pii
0303-7207(89)90029-4journal_volume
66pub_type
杂志文章abstract::Porcine Leydig cells in primary culture were incubated to equilibrium with increasing doses of either porcine luteinizing hormone (pLH) or human chorionic gonadotropin (hCG). Then, free and total high affinity gonadotropin receptors on the cell surface were dosed with [125I]hCG as tracer. In isotonic high salt medium,...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(91)90263-r
更新日期:1991-04-01 00:00:00
abstract::CYP11A1 encodes the P450scc enzyme that catalyzes the first and rate-limiting step of steroid biosynthesis. It is expressed in the adrenals and gonads under the control of pituitary peptide hormones. Transcription factor SF-1, which binds to the CYP11A1 promoter, plays an important role in the tissue-specific and horm...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2003.11.024
更新日期:2004-02-27 00:00:00
abstract::Human type II iodothyronine deiodinase (hDII) belongs to a family of selenoproteins. It catalyzes 5'-deiodination of thyroxine to generate an active thyroid hormone, 3,3',5-triiodothyronine. Two novel splice variants of hDII gene transcript; namely hDII-b and hDII-c, were identified. Three distinct DNA fragments (hDII...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(00)00368-3
更新日期:2001-02-14 00:00:00
abstract::Overexpression of the X-linked inhibitor of apoptosis (XIAP) prevents islet allograft rejection. We constructed an adeno-associated virus expressing XIAP driven by the rat insulin promoter (dsAAV8-RIP-XIAP) for long-term beta-cell gene expression in vivo. Pancreatic delivery of dsAAV8-RIP-XIAP prevented autoimmune dia...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2018.05.015
更新日期:2018-12-05 00:00:00
abstract::The angiotensin II (AngII) type 1 (AT(1)) receptor is a seven-transmembrane G protein-coupled receptor, and is involved in regulating the physiological and pathological process of the cardiovascular system. Systemically and locally generated AngII has agonistic action on AT(1) receptor, but recent studies have demonst...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2008.11.007
更新日期:2009-04-29 00:00:00
abstract::Administration of hydrocortisone to adrenalectomised rats elevated levels of both free and membrane-bound polysomes in liver and led to marked shifts in their sedimentation profiles in favour of heavier polysomes. The rate of nascent polypeptide formation was also found to be enhanced in response to the hormone but th...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(76)90038-1
更新日期:1976-02-01 00:00:00
abstract::Total RNA from several adult (6-18-month-old) rabbit tissues was characterized using an oligonucleotide probe derived from the extracellular domain of the nucleotide sequence of the rabbit growth hormone receptor (GH-R) cDNA. Multiple GH-R mRNA species of approximately 4.6, approximately 3.3, 2.1 and approximately 1.4...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(92)90193-a
更新日期:1992-01-01 00:00:00
abstract::The interaction between thyroid microsomal autoantibodies and thyroid microsomal antigen/thyroid peroxidase (TPO) has been studied using both intact antigen preparations and their water-soluble trypsin fragments. In an analysis of sera from 30 patients with Graves' or Hashimoto's diseases, microsomal antibodies showed...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(87)90187-0
更新日期:1987-09-01 00:00:00
abstract::Testicular peritubular cells produce paracrine mediators which modulate Sertoli cell function. The production of these mediators (P Mod-S) is controlled by androgens suggesting that mesenchymal-epithelial interactions play an important role in androgen action in the testis. We investigated whether mesenchymal cells fr...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(89)90124-x
更新日期:1989-03-01 00:00:00
abstract::Autodigestion of nuclei isolated from the androgen-dependent Shionogi mouse mammary carcinoma revealed the presence of endogenous endonuclease activity which was stimulated by Ca2+ and Mg2+ and generated a repeating pattern of DNA fragments with an average monomeric size of 179 base pairs. The nuclear concentration of...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(86)90144-9
更新日期:1986-05-01 00:00:00
abstract::Endocrine dysfunction in mitochondrial disease is commonplace, but predominantly restricted to disease of the endocrine pancreas resulting in diabetes mellitus. Other endocrine manifestations occur, but are relatively rare by comparison. In mitochondrial disease, neuromuscular symptoms often dominate the clinical phen...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2013.06.004
更新日期:2013-10-15 00:00:00
abstract::A kallikrein-related protease was purified from rat ventral prostate cytosol by means of DEAE-Sepharose chromatography, followed by gel filtration on Sephadex G-100 and CM-cellulose chromatography. Antibodies raised in rabbits against the purified protease recognize two bands on immunoblots of prostatic cytosol: a 31,...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(89)90008-7
更新日期:1989-04-01 00:00:00
abstract::Type 4 phosphodiesterases (PDE4s) of the large PDE enzyme superfamily have unique specificity for cAMP and may, therefore, be relevant for somatotroph tumorigenesis. Somatotroph adenomas typically overexpress PDEs probably as part of a compensatory mechanism to reduce cAMP levels. The rat PDE4A5 isoform (human homolog...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2018.04.014
更新日期:2018-11-15 00:00:00
abstract::Intrauterine growth retardation (IUGR) increases the risk of developing glucose intolerance and cardiovascular disease in adulthood. Fetal exposure to excess glucocorticoids may contribute to IUGR. Despite the importance of glucose supply for fetal growth, studies on glucose transporter expression in IUGR are few. Two...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(01)00629-3
更新日期:2001-12-20 00:00:00
abstract::Most secreted proteins are modified post-translationally with the addition of carbohydrate. It has been difficult to use crystallography to solve the structures of these proteins due to the inherent heterogeneity of the carbohydrate. The structure of the chemically deglycosylated form (hydrogen fluoride treated) of hu...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/s0303-7207(96)03952-4
更新日期:1996-12-20 00:00:00
abstract::17Beta hydroxysteroid dehydrogenase type 7 (HSD17B7) was described to possess dual functionality in steroidogenesis as well as in postsqualene cholesterol biosynthesis in vitro. In order to gain insight into the transcriptional regulation, and thereby into in vivo functionality of HSD17B7, we analyzed and compared the...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2005.10.016
更新日期:2006-03-27 00:00:00
abstract::The time- and dose-dependent effects of bovine activin A and bovine follicle stimulating hormone (FSH) suppressing protein (FSP) or follistatin on basal and FSH-induced steroidogenesis and inhibin production were studied in granulosa cells from immature, diethylstilbestrol (DES)-treated rats. In the presence of rat FS...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(90)90082-j
更新日期:1990-02-12 00:00:00
abstract::Ca2+-calmodulin-dependent protein phosphatase activity is found in cytoskeletons of Y-1 mouse adrenal and bovine fasciculata cells. The activity is inhibited by three inhibitors of calmodulin (trifluoperazine, W-7 and pimozide) with EC50 in the low micromolar range. Protein phosphatase activity is inhibited by vanadat...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(89)90078-6
更新日期:1989-05-01 00:00:00
abstract::The introduction of a targeted insertion mutation into exon 2 of the gene coding for the glucocorticoid receptor (GR) enabled production of glucocorticoid receptor knock-out (GRKO) mice. GRKO mice on a C57BL/6/129sv mixed genetic background show a variable phenotype, with 90% of -/- mice dying at birth with respirator...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(00)00407-x
更新日期:2001-02-28 00:00:00
abstract::Micropipettes were used to record electrical activity from single neurons in hypothalamic tissue slices, in the hypothalamic arcuate nucleus (ARC), and in the periventricular and suprachiasmatic preoptic nuclei (POA). Responses were measured following in vitro application of luteinizing hormone releasing hormone (LHRH...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(86)90038-9
更新日期:1986-12-01 00:00:00
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::Glucocorticoids (GCs) exert profound effects on bone and are essential for human osteoblast differentiation. However, GCs are still interpreted as negative regulators of bone formation, mainly caused by the detrimental effects on bone after clinical use of GCs. In this paper we emphasize the importance of GCs for prop...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2005.11.034
更新日期:2006-03-27 00:00:00
abstract::Di-(2-ethylhexyl)-phthalate (DEHP) accumulates in the environment, and its exposure is possibly associated with endocrine-related disease in women of reproductive age. The effects of DEHP on human endometrial cells are unknown. We treated human endometrial stromal cells with 10, 100, and 1000 pmol of DEHP and measured...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2015.03.003
更新日期:2015-05-15 00:00:00
abstract::In light of current discussions on multiple forms of inhibin, it was thought of interest to ascertain the identity of the postulated 'iso-hormones' of bull seminal plasma inhibin (Chari et al., 1978). By subjecting the biologically active fraction, obtained by Sephadex G-100 gel filtration of bull seminal plasma aceto...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(85)90022-x
更新日期:1985-07-01 00:00:00
abstract::Calcium homeostasis refers to the regulation of calcium ion concentration in the body. This concentration is tightly controlled by a stabilizing system consisting of calcium channels and calcium buffering proteins. Calcium homeostasis is crucial for cell survival. Various forms of cell death (e.g., necrosis and apopto...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2015.05.017
更新日期:2015-09-05 00:00:00
abstract::The family of G protein-coupled receptors (GPCRs) is the largest class of membrane proteins and an important drug target due to their role in many (patho)physiological processes. Besides small molecules, GPCRs can be targeted by biologicals including antibodies and antibody fragments. This review describes the use of ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2019.01.021
更新日期:2019-03-15 00:00:00
abstract::Protection of the spermatogenic cells from the host immune response is fundamental to male fertility. Significantly, this protection extends to the tolerance of foreign tissue grafts placed within the testicular environment, a phenomenon that is called 'immune privilege'. This privilege of the testis appears to involv...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2010.03.022
更新日期:2011-03-15 00:00:00
abstract::Key reproductive events, such as menstruation and implantation, are considered to be inflammatory processes and glucocorticoids act as anti-inflammatory agents. The balance of expression of types 1 and 2 11beta-hydroxysteroid dehydrogenases (11betaHSD) controls the availability of cortisol to bind to the glucocorticoi...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2005.12.010
更新日期:2006-03-27 00:00:00
abstract::Genomewide association studies (GWAS) have indicated that SNPs on a chromosome 16 locus encompassing FTO, as well as IRX3, 5, 6, FTM and FTL are robustly associated with human obesity. GWAS, however, are by nature gene agnostic, and SNPs reaching the appropriate statistical threshold for a given phenotype can appear a...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2014.09.012
更新日期:2014-11-01 00:00:00
abstract::Recent evidence suggests that lymphocytes produce prolactin (PRL). Here, we report the cDNA cloning and expression of PRL from normal human thymocytes. Sequence analysis showed that the thymocyte cDNA encodes a 23 kDa protein which is identical to pituitary PRL. RNA blot analysis showed that the thymocyte PRL mRNA is ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(92)90251-z
更新日期:1992-09-01 00:00:00