Abstract：
:The role of estrogens produced by the testis may involve negative feedback regulation of androgen biosynthesis. Estrogens are also associated with contractile processes of seminiferous tubules, and might have mitogenic effects on Sertoli and Leydig cells. To investigate the location of aromatase (estrogen synthetase) in the testes, tissue from normal human subjects, aged 3 months to 72 years were studied using immunocytochemistry. In mature testes, aromatase immunostain was always associated with Leydig cells and was absent from Sertoli cells. Aromatase activity ranged from 0.014-0.55 pmol estrogen per mg/h and was significantly correlated with the immunostain intensity (P<0.02). Activity and immunostain intensity did not correlate with increasing age. Rather, the highest levels were measured in four of six testes of men aged 18-20 years, three of whom also had the strongest immunostain in larger and more prominent Leydig cell clusters than those in the other specimens. A low level of aromatase activity but no immunostain was detected in prepubertal testes. However, in several prepubertal patients with Peutz-Jegher's Syndrome (PJS) with bilateral multifocal sex cord tumors and enlarged seminiferous tubules and Sertoli cells, aromatase was expressed in these Sertoli cells, but absent from normal Sertoli and Leydig cells. Increased aromatase expression in these tissues involved activation of upstream regulatory elements of the gonadal P II promoter of P-450(arom). In a prepubertal boy with gynecomastia but without PJS, aromatase excess appeared to be due to increased aromatization in skin fibroblasts and lymphocytes. Several members of the patient's family including his sister also expressed high levels of aromatase. This condition appears to be inherited in an autosomal dominant manner.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Brodie A,Inkster S,Yue Wdoi
10.1016/s0303-7207(01)00444-0keywords:
subject
Has Abstractpub_date
2001-06-10 00:00:00pages
23-8issue
1-2eissn
0303-7207issn
1872-8057pii
S0303720701004440journal_volume
178pub_type
杂志文章abstract：:An accurate understanding of the molecular events governing pancreas development can have an impact on clinical medicine related to diabetes, obesity and pancreatic cancer, diseases with a high impact in public health. Until 1996, the main animal models in which pancreas formation and differentiation could be studied ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2009.04.018
更新日期：2009-11-27 00:00:00
abstract：:Although well-established, the underlying mechanisms involved in obesity-related plasma adiponectin decline remain elusive. Oxidative stress is associated with obesity and insulin resistance and considered to contribute to the progression toward obesity-related metabolic disorders. In this study, we investigated the e...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2011.10.027
更新日期：2012-02-26 00:00:00
abstract：:As part of a study concerning the mechanism of mammotroph autoregulation, the intracellular fate of [125I]iodo rat PRL, internalized by mammotrophs, was determined by quantitative electron microscope autoradiography. Simple grain density (GD) analysis of mammotroph autoradiograms showed that 5 cellular compartments (p...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(85)90057-7
更新日期：1985-10-01 00:00:00
abstract：:The adenosine 3', 5'-cyclic monophosphate (cyclic AMP)-dependent protein phosphokinase of rat interstitial cells was characterized by ion-exchange chromatography and sucrose density gradient centrifugation. The 0.2 M NaCl fraction from DEAE-Sephadex showed a small 2.9-S peak of basal enzyme activity, and a large 6.5-S...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(76)90074-5
更新日期：1976-06-01 00:00:00
abstract：:Findings concerning the role of diabetes mellitus (DM) in osteoclast differentiation are contradictory in vivo and in vitro. Sirtuin 1 (SIRT1) can inhibit RANKL-induced osteoclastogenesis and deacetylate p66Shc suppress its phosphorylation in high glucose (HG)-stimulated human umbilical vein endothelial cells. This st...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2018.02.015
更新日期：2018-10-15 00:00:00
abstract：:Pioglitazone belongs to the class of drugs called thiazolidinediones (TZDs), which are widely used as insulin sensitizers in the treatment of diabetes. A major side effect of TZDs is fluid retention. The steroid hormone aldosterone also promotes sodium and fluid retention; however, the effect of pioglitazone on aldost...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2014.07.007
更新日期：2014-08-25 00:00:00
abstract：:Carbamylcholine and acetylcholine through a muscarinic type of receptor, KCl, ionophore A-23187 and NaF increased cyclic GMP accumulation in dog-thyroid slices. These effects were abolished in calcium-depleted slices, which findings confirm that Ca2+ is required for cyclic GMP accumulation. All these agents depressed ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(79)90057-1
更新日期：1979-04-01 00:00:00
abstract：:The final steps in the Renin-Angiotensin-Aldosterone signaling System (RAAS) involve binding of the corticosteroid hormone, aldosterone to its mineralocorticoid receptor (MR). The bound MR interacts with response elements to induce or repress the transcription of aldosterone-regulated genes. Along with the classic gen...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2020.111115
更新日期：2021-02-05 00:00:00
abstract：:To identify estrogen-responsive genes, we previously isolated estrogen receptor (ER)-binding DNA fragments from human genomic DNA using a recombinant ER protein. Six DNA fragments, each including a perfect palindromic estrogen response element (ERE), were obtained. The nucleotide sequence of one of the six fragments (...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2012.10.015
更新日期：2013-01-30 00:00:00
abstract：:Forskolin, a diterpene hypotensive drug, activates adenylate cyclase in brain and in some other tissues (Seamon et al., 1981). Forskolin activated adenylate cyclase in particulate preparations and enhanced cyclic AMP accumulation in slices of dog thyroid. These effects were maximal within minutes and remained constant...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(83)90009-6
更新日期：1983-01-01 00:00:00
abstract：:Vascular endothelial growth factor (VEGF) is a main factor promoting neovascularization (angiogenesis) of solid tumours as prostate carcinoma. Hypoxia stimulates VEGF gene expression by activating the hypoxia-inducible factor-1 (HIF-1alpha). In the present study, the hypoxia-mimicking agent Ni(2+) induced vasoactive i...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2006.02.004
更新日期：2006-04-25 00:00:00
abstract：:The prostate gland is highly dependent on androgens for its development, growth and function. Consequently, the prostatic epithelium predominantly consists of androgen-dependent luminal cells, which express the androgen receptor at high levels. In contrast, androgens are not required for the survival of the androgen-r...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2011.07.008
更新日期：2012-09-05 00:00:00
abstract：:The effects of a GnRH antagonist analogue (N-acetyl-Ala1,D-p-Cl-Phe2,D-Trp3,6-GnRH, Ant.) and a GnRH antiserum (A/S) on the development of pituitary-testicular function were studied in immature (23/24-31/32-day-old) rats. In another experiment the Ant. treatment was combined with bromocriptine (BR)-induced hypoprolact...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(84)90065-0
更新日期：1984-02-01 00:00:00
abstract：:Elaboration of a multicellular organism requires highly efficient coordination between proliferation and developmental processes. Accordingly, the embryonic cell cycle exhibits a high degree of plasticity; however, the mechanisms underlying its regulation in vivo remain largely unknown. The purpose of this review is t...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2007.11.008
更新日期：2008-01-30 00:00:00
abstract：:Since high expression of farnesoid X receptor (FXR) has been detected in glucocorticoid-producing adrenocortical cells, we evaluated the potential role of FXR in adrenal glucocorticoid production. FXR agonist GW4064 increased fasting plasma corticosterone levels (+45%; P<0.01) in C57BL/6 mice, indicative of enhanced a...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2012.05.010
更新日期：2012-10-15 00:00:00
abstract：:South African Angora goats are susceptible to cold stress, due to their inability to produce sufficient levels of cortisol. During adrenal steroidogenesis the production of cortisol relies on the activity of two key enzymes, namely cytochrome P450 17alpha-hydroxylase and 3beta-hydroxysteroid dehydrogenase. Cytochrome ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2009.07.026
更新日期：2010-02-05 00:00:00
abstract：:The degradation products generated from A14 and B26 125I-labelled insulins in liver endosomes in vivo and in vitro have been isolated by high-performance liquid chromatography and cleavages in the B chain have been identified by automated radiosequence analysis. In rats sacrificed various times after injection of each...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(90)90142-u
更新日期：1990-09-10 00:00:00
abstract：:Thymocytes from SJL/J mice exhibit a periodicity in their response to hormonal stimulation with isoproterenol. This periodicity (5-9 days) is expressed in large changes in the intensity of the response (peak levels of intracellular cAMP which vary approximately 6-fold), and in the response pattern, i.e., in the occurr...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(90)90134-t
更新日期：1990-10-22 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：:The high-density lipoprotein (HDL) pathway in rat adrenocortical cells was studied at the electron microscopic level in vitro via colloidal gold labelling. Steroid hormone assays were performed to confirm that the cells remained intact, viable, responsive to ACTH under the applied conditions, and to reveal the steroid...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(86)90062-6
更新日期：1986-02-01 00:00:00
abstract：:A central question in glucocorticoid mechanism of action via the glucocorticoid receptor (GR) is what determines ligand-selective transcriptional responses. Using a panel of 12 GR ligands, we show that the extent of GR phosphorylation at S226 and S211, GR half-life and transcriptional response, occur in a ligand-selec...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2010.06.007
更新日期：2010-10-07 00:00:00
abstract：:This paper reviews work on progesterone and the progesterone receptor (PR) in the mouse mammary gland that has been used extensively as an experimental model. Studies have led to the concept that progesterone controls proliferation and morphogenesis of the luminal epithelium in a tightly orchestrated manner at distinc...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2011.10.030
更新日期：2012-06-24 00:00:00
abstract：:The congenital adrenal hyperplasias (CAH) are a group of genetic defects in cortisol biosynthesis, most commonly steroid 21-hydroxylase deficiency (21OHD). With the advent of cortisone therapy in the 1960s and newborn screening in the 1990s, most children with 21OHD now reach adulthood. The needs and concerns of adult...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2015.01.039
更新日期：2015-06-15 00:00:00
abstract：:A large part of germ cells die apoptotically during testicular development in rodents. In the present study, a wave of germ cell apoptosis was observed between days 10 and 30 of postnatal life by in situ 3'-end labeling and DNA fragmentation analysis. To explore the potential involvement of Bcl-2 family members in thi...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(00)00257-4
更新日期：2000-07-25 00:00:00
abstract：:A pair of glands (Y-organs) in crustaceans synthesize and secrete ecdysteroid hormones; the obligate precursor for synthesis is circulating cholesterol. Ecdysteroid output by the Y-organs is regulated negatively by an eyestalk neurosecretory peptide, molt-inhibiting hormone (MIH). The question was addressed, does MIH ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(93)90035-i
更新日期：1993-09-01 00:00:00
abstract：:Recently, a remarkable progress has been made in our understanding about the role of sex steroids in male physiology. In this paper, we consider the clinical aspects of congenital estrogen deficiency - notably, estrogen resistance and aromatase deficiency - in men and we discuss both well-established and supposed estr...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/s0303-7207(01)00432-4
更新日期：2001-06-10 00:00:00
abstract：:Adrenocortical tumors (ACTs) frequently cause steroid excess and present cell-cycle dysregulation. cAMP/PKA signaling is involved in steroid synthesis and play a role in cell-cycle regulation. We investigated, by cell synchronization in the different phases of the cell-cycle, the control of steroidogenesis and the con...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2019.110636
更新日期：2020-01-15 00:00:00
abstract：:A critical regulatory component of the hypothalamus/pituitary/adrenal axis (HPA) in mammals, reptiles and birds, and in the hypothalamus/pituitary/interrenal (HPI) axis of amphibians and teleosts (modern bony fishes) is the strict ligand selectivity of the melanocortin-2 receptor (MC2R). Tetrapod and teleost MC2R orth...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2014.12.022
更新日期：2015-06-15 00:00:00
abstract：:Heat shock protein 90 (Hsp90) has been demonstrated in both cytoplasm and nucleus, and regulates cytoplasmic retention of glucocorticoid receptor (GR). However, the role of nuclear Hsp90 in GR trafficking is less characterized. The present study examined the role of Hsp90 in nuclear retention of GR after ligand withdr...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2003.10.057
更新日期：2004-01-15 00:00:00
abstract：:Recent evidence suggests that the classic gut peptide, Peptide YY (PYY), could play a fundamental role in endocrine pancreatic function. In the present study expression of PYY and its NPY receptors on mouse islets and immortalised rodent and human beta-cells was examined together with the effects of both major circula...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2016.07.020
更新日期：2016-11-15 00:00:00
