Abstract:
:Progesterone and its polar metabolite(s) trigger the meiotic divisions in the amphibian oocyte through a non-genomic signaling system at the plasma membrane. Published site-directed mutagenesis studies of ouabain binding and progesterone-ouabain competition studies indicate that progesterone binds to a 23 amino acid extracellular loop of the plasma membrane α-subunit of Na/K-ATPase. Integral membrane proteins such as caveolins are reported to form Na/K-ATPase-peptide complexes essential for signal transduction. We have characterized the progesterone-induced Na/K-ATPase-caveolin (CAV-1)-steroid 5α-reductase interactions initiating the meiotic divisions. Peptide sequence analysis algorithms indicate that CAV-1 contains two plasma membrane spanning helices, separated by as few as 1-2 amino acid residues at the cell surface. The CAV-1 scaffolding domain, reported to interact with CAV-1 binding (CB) motifs in signaling proteins, overlaps transmembrane (TM) helix 1. The α-subunit of Na/K-ATPase (10 TM helices) contains double CB motifs within TM-1 and TM-10. Steroid 5α-reductase (6 TM helices), an initial step in polar steroid formation, contains CB motifs overlapping TM-1 and TM-6. Computer analysis predicts that interaction between antipathic strands may bring CB motifs and scaffolding domains into close proximity, initiating allostearic changes. Progesterone binding to the α-subunit may thus facilitate CB motif:CAV-1 interaction, which in turn induces helix-helix interaction and generates both a signaling cascade and formation of polar steroids.
journal_name
Steroidsjournal_title
Steroidsauthors
Morrill GA,Kostellow AB,Askari Adoi
10.1016/j.steroids.2012.04.012subject
Has Abstractpub_date
2012-09-01 00:00:00pages
1160-8issue
11eissn
0039-128Xissn
1878-5867pii
S0039-128X(12)00138-9journal_volume
77pub_type
杂志文章相关文献
STEROIDS文献大全abstract::Variations in sex steroids bioavailability were linked to the gender difference in the growth of thyroid glands of neonatal rats. In the present study we tested androgen receptor (AR) and estrogen receptor (ER) concentrations by ligand binding assay, and expression of their genes by RT-PCR and Western blot in the thyr...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2010.06.009
更新日期:2010-12-12 00:00:00
abstract::Carbon-11-labeled casimiroin analogues were first designed and synthesized as new potential PET agents for imaging of quinone reductase (QR) 2 and aromatase expression in breast cancer. [(11)C]casimiroin (6-[(11)C]methoxy-9-methyl-[1,3]dioxolo[4,5-h]quinolin-8(9H)-one, [(11)C]11) and its carbon-11-labeled analogues 5,...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2010.06.004
更新日期:2010-12-01 00:00:00
abstract::In addition to using radioimmunoassays for the determination of estrogens and other steroids, the possibility of using mass fragmentography for analysis was investigated. t-Butyldimethylsilyl chloride was selected as a reagent for derivatisation because it forms rather stable silylethers. In all the mass-spectra obrai...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(79)90013-8
更新日期:1979-04-01 00:00:00
abstract::The apolar ecdysteroid present in the developing embryo of the blue crab, Callinectes sapidus Rathbun, is tentatively identified as ponasterone A (2 beta, 14 alpha, 20,22-pentahydroxy-5, beta-cholest-7-en-6-one) on the basis of chromatographic, immunological, and mass spectral evidence. The apolar ecdysteroid present ...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(79)90092-8
更新日期:1979-12-01 00:00:00
abstract::In this paper, we studied the effect of heme availability on corticosterone and aldosterone synthesis in rat adrenal. We found that hemin stimulated corticosterone and aldosterone production in adrenal homogenates in a dose-dependent fashion. Hemin administration to rats also provoked an increase in both corticosteron...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/s0039-128x(97)00074-3
更新日期:1997-12-01 00:00:00
abstract::Catalytic cycloalumination of (3β,5α)-3-vinylcholestane and (3α,5α)-3-allylcholestane with Et3Al catalyzed by Cp2ZrCl2 was performed for the first time to give previously unknown aluminacyclopentanes in ∼90% yield; these products were converted in situ to carbo- and heterocyclic (5α)-cholestane derivatives. ...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2016.01.015
更新日期:2016-04-01 00:00:00
abstract::Extranuclear estrogen receptors may mediate rapid effects of estradiol that communicate with nuclear receptors and contribute to proliferation of human cancers bearing these signaling proteins. To assess these growth-promoting pathways, we undertook controlled homogenization and fractionation of NIH-H23 non-small cell...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2005.02.017
更新日期:2005-05-01 00:00:00
abstract::The palladium-catalyzed coupling of various 17-iodo-delta 16 steroids (17-iodo-androst-16-ene, 17-iodo-4-methyl-4-aza-androst-16-en-3-one, and 17-iodo-4-aza-androst-16-en-3-one) with dialkyl phosphites (dimethyl phosphite, diethyl phosphite, and diisopropyl phosphite) was examined in detail. The only successful condit...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(95)00121-6
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:Chronic administration of exogenous glucocorticoids is often required in experimental research. We compared the efficacy and reliability of three different methods of continuous glucocorticoid administration in mice. MATERIALS AND METHODS:Male CD1 Swiss White mice aged 7-9 weeks received corticosterone (CS)...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2008.11.009
更新日期:2009-02-01 00:00:00
abstract::Complete analysis of the proton nuclear magnetic resonance spectrum of desoxycorticosterone (DOC) has been made using selective double irradiation, two-dimensional experiments, relaxation rate, and nuclear Overhauser effect measurements in order to specify the structure and conformation of products encountered during ...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(88)90025-6
更新日期:1988-03-01 00:00:00
abstract::Nine new steroidal glycosides, named as stauntosides C-K (2, 5, 7-10, 13, 14, and 16), along with seven known compounds (1, 3, 4, 6, 11, 12, and 15) were isolated from the 95% ethanol extract of the roots of Cynanchum stauntonii. The structures of these new compounds were elucidated on the basis of extensive spectrosc...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2012.10.007
更新日期:2013-01-01 00:00:00
abstract::Estradiol benzoate (EB) has been one of the most widely used estrogenic agents in animal husbandry, as a way of exogenously introducing the natural hormone estradiol-17β into the animal organism. Estradiol was previously employed to induce anabolic effects or reproductive improvements in cattle. However, the employmen...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2010.12.005
更新日期:2011-03-01 00:00:00
abstract::In this study, effects of estradiol, progesterone and genistein on uterine aquaporin (AQP)-1, 2, 5 and 7 expression were investigated in sex-steroid deficient state which could help to elucidate the mechanisms underlying uterine fluid volume changes that were reported under these hormone and hormone-like compound infl...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2016.08.007
更新日期:2016-11-01 00:00:00
abstract::Oleoyl-estrone (OE) induces a marked loss of body fat in rats by maintaining energy expenditure, body protein and blood glucose despite decreasing food intake. OE increases glucocorticoids, but they arrest OE lipid-mobilization. We studied here whether OE induces a direct effect on adrenal glands function as part of t...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2009.09.009
更新日期:2010-01-01 00:00:00
abstract::It has been shown that stress or disease-induced increases in plasma corticosterone result in diminished testosterone secretion from the testes. This article reviews investigations from our laboratories that explore the role of 11 beta-hydroxysteroid dehydrogenase (11 beta-OHSD) in this process. It is proposed that th...
journal_title:Steroids
pub_type: 杂志文章,评审
doi:10.1016/0039-128x(94)90078-7
更新日期:1994-02-01 00:00:00
abstract::A new technique that permits measurement of Androgen-Binding Protein (ABP) is validated by reproducibility, linearity and correlation studies. Using this apparatus allowing Scatchard plot analysis, it is also possible to measure association and dissociation rate constants. In addition, it is a very useful tool for a r...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(88)90174-2
更新日期:1988-10-01 00:00:00
abstract::Bile acid derivatives, with and without C-3 sulfate groups, and having either the diazo- or halomethylketone moieties, have been synthesized in good yield and purity. The synthetic sequence, COOH leads to COC1 leads to COCHN2 leads to COCH2X, was used with deoxycholic and cholic acids, which requires carefully control...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(79)90046-1
更新日期:1979-08-01 00:00:00
abstract::Addition of soluble supernatant to testis microsomes results in 42% increase in steroid 17,20-lyase activity and a 65% increase in 17alpha-hydroxylase activity. This stimulatory activity could be partially purified by salt fractionation. The activating factor(s) was not removed by dialysis nor did it appear to be lipi...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(78)90090-9
更新日期:1978-10-01 00:00:00
abstract::To determine the sensitivity of the overnight 1-mg dexamethasone suppression test in diagnosing Cushing's syndrome, we evaluated the cortisol responses of 55 subjects (25 non-obese individuals with body mass index less than 25 kg/m2, 20 obese individuals with body mass index greater than 30 kg/m2, and 10 patients with...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(91)90011-j
更新日期:1991-11-01 00:00:00
abstract::Thyroid hormone receptors (TRs) are nuclear receptors that are activated by thyroid hormone ligands and co-regulator proteins. Two receptor subtypes, TRalpha and TRbeta, have been suggested to play a role in numerous physiological functions. However, specificity of receptor subtype function and co-regulator interactio...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2008.11.014
更新日期:2009-02-01 00:00:00
abstract::Nuclear membrane bound testosterone 5 alpha-reductase solubilized in active form from human prostatic tissue by 0.5% n-octyl beta-D-glucopyranoside was purified by a four-step chromatographic procedure including DEAE-Trisacryl ion exchange, hydroxylapatite adsorption, testosterone-Sepharose affinity and Sepharose 4B g...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(94)90103-1
更新日期:1994-12-01 00:00:00
abstract::This paper describes three simple and short methods for the conversion of cholic acid into cholylaldehyde with protected hydroxyl groups. The first method involves lithium aluminum hydride reduction of the tetrahydropyranyl ether of methyl cholate and oxidation of the resulting primary alcohol with pyridinium chloroch...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/0039-128x(82)90140-4
更新日期:1982-06-01 00:00:00
abstract::Deltonin is a steroidal saponin which could suppress tumor growth through suppressing angiogenesis, but the mechanisms have not been directly elucidated yet. In the present study, we showed that deltonin inhibited the proliferation of primary cultured human umbilical vein endothelial cells (HUVECs) in vitro; notably, ...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2014.12.019
更新日期:2015-04-01 00:00:00
abstract::Steroid delta 4-5 alpha- and delta 4-5 beta-reductase activity was determined in 16 human mammary tumors and 8 DMBA-induced rat mammary tumors using a spectrophotometric assay. Steroid delta 4-5 alpha-reductase was present in all tumors investigated while delta 4-5 beta-reductase was detected in only 6 estrogen recept...
journal_title:Steroids
pub_type: 历史文章,杂志文章
doi:10.1016/s0039-128x(79)80010-0
更新日期:1979-01-01 00:00:00
abstract::The Na-K-2Cl cotransporter (NKCC2) regulates sodium transport along the thick ascending limb of Henle's loop and is important in control of sodium balance, renal concentrating ability and renin release. To determine if there are sex differences in NKCC2 abundance and/or distribution, and to evaluate the contribution o...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2010.05.014
更新日期:2010-11-01 00:00:00
abstract::Three BS-BODIPY (brassinosteroids-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) conjugates were synthesized and their fluorescent and immunological properties were investigated. Two of the conjugates, having present all the functional groups characteristic of BS, were shown to be potentially useful as biological probes ...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2015.07.002
更新日期:2015-10-01 00:00:00
abstract::Steroidal nucleoside analogs were synthesized starting from testosterone. By reduction of the oxime of 17 beta-hydroxy-androst-4-en-3-one (testosterone), a mixture of the two amino epimers of C-3 were obtained. The 3 alpha-amino-androst-4-en-17 beta-ol was crystallized in 73% yield and coupled with 5-amino-4,6-dichlor...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/s0039-128x(01)00157-x
更新日期:2002-03-01 00:00:00
abstract::Inhaled corticosteroids (ICS) are the standard of care in asthma and are widely used in the treatment of patients with COPD. The influence of steroids on inflammatory processes has long been established since glucocorticoids and their receptor belong to the regulatory network involved in inhibition of several inflamma...
journal_title:Steroids
pub_type: 杂志文章,评审
doi:10.1016/j.steroids.2006.10.007
更新日期:2007-01-01 00:00:00
abstract::Within the adult female, estrogen signaling is well-described as an integral component of the physiologically significant hypothalamic-pituitary-gonadal axis. In rodents, the timing of ovulation is intrinsically entwined with the display of sexual receptivity. For decades, the importance of estradiol activating intrac...
journal_title:Steroids
pub_type: 杂志文章,评审
doi:10.1016/j.steroids.2017.11.013
更新日期:2018-05-01 00:00:00
abstract:BACKGROUND:Urinary steroid profiling by GC or GC-MS are established clinical tools to complement other biochemical tests in the diagnosis and investigation of a wide range of adrenocortical disorders, but normative data on adults using the more specific GC-MS are lacking. Our objective was to set up the reference inter...
journal_title:Steroids
pub_type: 杂志文章
doi:10.1016/j.steroids.2008.03.004
更新日期:2008-09-01 00:00:00