Abstract:
:The transcriptional activity of various lengths of the 5'-untranslated region (UTR) of the murine LH receptor (R) gene were studied using the luciferase reporter gene in transiently transfected mouse Leydig tumor cells (mLTC-1). Chinese hamster ovarian (CHO) and HeLa cells were used as controls. The basal transcriptional promoter activity in mLTC-1 cells resided within the first 173 base pairs (bp) of the 5'-UTR. Placing an LHR promoter fragment (bases -715/ -56) in front of the Herpes simplex virus thymidine kinase (TK) minimal promoter resulted in a 7-fold increase in luciferase activity. Deletion of bases -56 to -173 of the above construct totally abolished the increased luciferase activity, brought about by the LHR promoter sequences. Basically similar results on LHR promoter function were observed using CHO cells. In contrast, no LHR promoter activity was detected in HeLa cells, indicating a cell specific nature of its function. The first 173 bp promoter domain is GC-rich, with several SP-1 binding domains, and it bound specifically nuclear proteins isolated from mLTC-1 and HeLa cells. RNAse protection assays reconfirmed the presence of several transcription initiation sites within the first 310 bp of the 5'-UTR, also in the absence of the cognate LHR coding sequences. The most distal site at bp -310 did not function in the absence of the first 173 bp of the 5'-UTR. Other transcription initiation sites were identified closer to the translation initiation site. hCG (50 micrograms/l), 8-bromo (Br)-cAMP (100 mumol/l) and cholera toxin (100 microgram/l) displayed qualitatively similar negative effects on the LHR promoter activity in the transfected mLTC-1 cells when the constructs containing at least the first 565 bp of the LHR 5'-UTR were used, but the inhibitory effects were greatly decreased in constructs containing < or = 304 bp of the promoter region. Hence, the hCG/cAMP associated inhibitory effects interact with region(s) located mainly between bp -565 and -305 of the LHR promoter. The inhibitory role of cAMP on LHR gene expression was also confirmed at the level of hCO-binding and hCG stimulated cAMP production of mLTC-1 cells. In conclusion, the current results elucidate the cis- and trans-acting elements in the regulation of expression of the murine LHR gene in cultured mouse Leydig cells. The minimal basal promoter activity is within the first 173 nucleotides of the 5'-UTR and the structural elements of the negative LHR regulation by the cognate hormone and elevated cAMP levels are mainly located within nucleotides -305 to -565 of the 5'-UTR. The function of the murine LHR promoter is similar to, though not identical with that of the rat, but at variance with that of the human LHR gene.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
El-Hefnawy T,Krawczyk Z,Nikula H,Viherä I,Huhtaniemi Idoi
10.1016/0303-7207(96)03815-4subject
Has Abstractpub_date
1996-05-31 00:00:00pages
207-17issue
2eissn
0303-7207issn
1872-8057pii
0303720796038154journal_volume
119pub_type
杂志文章abstract::We previously reported that kappa opioids stimulated the release of human placental lactogen (hPL) from trophoblastic cells and that this effect was prevented by co-incubation with naloxone. We also reported that adenylate cyclase was not directly involved in this process. In order to understand the post-receptor even...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(93)90148-d
更新日期:1993-01-01 00:00:00
abstract::The so-called calcium antagonist D-600 and agents that enhance the influx of calcium ions into nerve terminals during action potentials (4-aminopyridine, tetraethylammonium, guanidine) interact with alpha-adrenoceptors. The interaction was revealed by binding experiments in vitro with the alpha 2- and alpha 1-specific...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(80)90054-4
更新日期:1980-09-01 00:00:00
abstract::Extracts from the plant Pygeum africanum are widely used in the therapy of benign prostate hyperplasia (BPH) and in combinational therapy for prostate cancer, the second leading cause of cancer death and the mostly diagnosed form of cancer in men. The androgen receptor (AR) plays a crucial role in the development of t...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2010.09.013
更新日期:2011-01-30 00:00:00
abstract::Differences in sialic acid content of the hormone have been considered the main determinant of FSH polymorphism. The aim of the present study was to investigate the effect of variations in the oligosaccharide structure of the intrapituitary human FSH (hFSH) glycosylation variants on their intrinsic biological activity...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(00)00453-6
更新日期:2001-03-28 00:00:00
abstract::The transforming growth factor beta (TGF-beta) superfamily includes several closely related peptides including the activins and inhibins. Since we recently reported that TGF-beta 1 and beta 2 are potent inducers of steroid 5 alpha-reductase (5 alpha R), we have now studied the effects of these other peptides using pri...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(94)03430-2
更新日期:1995-01-01 00:00:00
abstract::Perfluorooctanoic acid (PFOA) is a persistent pollutant worldwide and even found in human cord blood and breast milk. Some animal studies have reported that PFOA causes developmental toxicity such as fetal weight loss, but the mechanism is still unclear. This study focused on developmental toxicity of PFOA, particular...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2011.01.009
更新日期:2011-04-30 00:00:00
abstract::Vitamin D is a key factor for calcium and bone homeostasis, but signalling through the vitamin D receptor (VDR) seems also to be important for testicular function. To test the functional role of vitamin D signalling we examined the male reproductive system of the Leuven Vdr-ablated (Vdr(-/-)) mice, previously establis...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2013.06.036
更新日期:2013-09-05 00:00:00
abstract::Growth hormone (GH) and its mediator, the insulin-like growth factor-1 (IGF-1) regulate somatic growth, metabolism and many aspects of aging. As such, actions of GH/IGF have been studied in many tissues and organs over decades. GH and IGF-1 are part of the hypothalamic/pituitary somatotrophic axis that consists of man...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2020.111052
更新日期:2021-01-01 00:00:00
abstract::Vitelline membrane outer layer protein 1 (VMO1), a basic protein present in the outer layer of the vitelline membrane of eggs, plays essential roles in separating the yolk from the egg white and preventing infection from bacteria by forming a barrier of fibrous layers in avian eggs. Although VMO1 is expressed in the o...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2014.10.015
更新日期:2015-01-05 00:00:00
abstract::In the presence of retinoic acid (RA), F9 murine teratocarcinoma cells differentiate into cells resembling the extra-embryonic endoderm of the early mouse embryo. Using differential hybridization, we have cloned and characterized six cDNAs corresponding to mRNAs that exhibit reduced expression in F9 cells following RA...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(98)00127-0
更新日期:1998-08-25 00:00:00
abstract::Thyroid dysgenesis is the most frequent cause of congenital hypothyroidism, but its molecular pathophysiology is largely unknown. Our hypothesis that some genes downstream to thyroid transcription factor-2 (TTF-2) might be responsible for development of the thyroid prompted us to identify genes whose expression is sti...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2004.04.003
更新日期:2004-06-30 00:00:00
abstract::Dispersed, estradiol (E2)-treated, rat pituitary cell cultures were used to examine the intracellular processing of progesterone (P) associated with its modulation of gonadotropin-releasing hormone (GnRH)-stimulated luteinizing hormone (LH) secretion. Enhancement and suppression of LH release was only observed with ac...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(90)90181-7
更新日期:1990-01-22 00:00:00
abstract::Human placenta produces melatonin and expresses its receptors. We propose that melatonin, an antioxidant, protects the human placenta against hypoxia/reoxygenation (H/R)-induced damage. Primary term villous cytotrophoblasts were cultured under normoxia (8% O2) with or without 1mM melatonin for 72h to induce differenti...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2013.07.010
更新日期:2013-12-05 00:00:00
abstract::Stimulation of insulin secretion is accompanied by changes in the phosphorylation state of several islet polypeptides. Protein (de)phosphorylation is mediated by the action of protein kinases and phosphoprotein phosphatases. In this study we have investigated expression of phospho-serine/threonine phosphatases (PPs) i...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(95)03747-0
更新日期:1996-03-25 00:00:00
abstract::Mice carrying an RGS-insensitive Gαi2 mutation display growth retardation early after birth. Although the growth hormone (GH)-axis is a key endocrine modulator of postnatal growth, its functional state in these mice has not been characterized. The present study was undertaken to address this issue. Results revealed th...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2020.111098
更新日期:2021-02-05 00:00:00
abstract::There are multiple systems for cellular cholesterol delivery for steroidogenesis, including uptake of lipoprotein-derived cholesterol via LDL receptor mediated endocytic pathways and SR-BI mediated "selective" pathways, as well as from endogenous cholesterol synthesis and the mobilization of stored cholesteryl esters....
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2006.12.001
更新日期:2007-02-01 00:00:00
abstract::Dehydroepiandrosterone (DHEA), a precursor sex steroid, circulates in sulphated form (DHEAS). Serum DHEAS concentrations are inversely correlated with metabolic syndrome components and in vivo/in vitro studies suggest a role in modulating adipose mass. To investigate further, we assessed the in vitro biological effect...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2010.02.017
更新日期:2010-05-14 00:00:00
abstract::One of the key messages of recent Salpea and Stratakis work is to underline the clinical similarities shared by these syndromes that could be explained by a defect in the same signaling pathway, i.e. activation of the cAMP pathway. That being said, we would like to emphasize that hepatopancreato-biliary lesions are on...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2013.10.020
更新日期:2014-01-25 00:00:00
abstract::Mesenchymal stem cells (MSC) are of interest for cell therapy since their secreted factors mediate immunomodulation and support tissue regeneration. This study investigated the direct humoral interactions between MSC and pancreatic β-cells using human telomerase-immortalized MSC (hMSC-TERT) and rat insulinoma-derived ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2018.01.024
更新日期:2018-09-15 00:00:00
abstract::Within the seminiferous tubules, the Sertoli cells create an impermeable blood-testis barrier and an unique intratubular microenvironment that fosters the development of spermatozoa. The functional differentiation of spermatozoa therefore requires vectorial secretion by Sertoli cells of substances that cannot cross th...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(91)90208-a
更新日期:1991-10-01 00:00:00
abstract::This study examines the effect of FSH, testosterone and estradiol on testicular LH receptors and in vitro testicular responsiveness to LH in immature rats under various conditions. FSH treatment of 15-day-old immature rats significantly increased the number of LH receptors but did not alter testicular responsiveness. ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(77)90004-1
更新日期:1977-10-01 00:00:00
abstract::PTH/PTHrP receptor gene expression was evaluated in situ in avian epiphyseal growth plates taken from normal, rachitic and tibial dyschondroplasia (TD) afflicted chicks induced by thiram or by genetic selection. In the normal growth plates, PTH/PTHrP receptor gene expression was localized to the maturation zone as dem...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(98)00231-7
更新日期:1999-03-25 00:00:00
abstract::Insulin-induced glucose uptake by skeletal muscle results from Akt2 activation and is severely impaired during insulin resistance. Recently, we and others have demonstrated that BMP9 improves glucose homeostasis in diabetic and non-diabetic rodents. However, the mechanism by which BMP9 modulates insulin action remains...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2010.01.003
更新日期:2010-05-05 00:00:00
abstract::The inappropriate expressions of insulin-like growth factors (IGF-I and II) and IGF-I receptor (IGF-IR) are implicated in the malignant growth of many cancers. To determine changes, if any, in the levels of expression of IGFs and IGF receptor genes in neoplastic endometrium, relative to normal endometrium, the mRNA le...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(99)00092-1
更新日期:1999-07-20 00:00:00
abstract::Little is known about the regulation and cellular distribution of androgen receptors (ARs) in female rodent brains at various stages of the oestrous cycle. This information is critical for further studies of androgen signalling in the regulation of brain function under physiological and pathophysiological conditions. ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2010.02.029
更新日期:2010-06-10 00:00:00
abstract::The expression of Kiss1 in the anteroventral periventricular nucleus (AVPV) and its product, metastin/kisspeptin, show a circadian pattern with a peak in the evening, which shows a strong phase relationship with the time of the gonadotropin-releasing hormone (GnRH)/luteinizing hormone (LH) surge in rodents. Here we re...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2011.03.020
更新日期:2011-06-06 00:00:00
abstract::Some pituitary hormones are expressed in leukocytes and are thought to play a role in the regulation of leukocyte function. We studied the expression of the mRNA for the beta-chains of luteinising hormone (LHbeta) and chorionic gonadotropin (CGbeta) and their translation into protein in various leukocyte subsets. Mono...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(00)00208-2
更新日期:2000-04-25 00:00:00
abstract::Temperature-dependent sex determination (TSD) is a prime example of phenotypic plasticity in that gonadal sex is determined by the temperature of the incubating egg. In the red-eared slider turtle (Trachemys scripta), the effect of temperature can be overridden by exogenous ligands, i.e., sex steroid hormones and ster...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2011.10.012
更新日期:2012-05-06 00:00:00
abstract::It has recently been shown that mammals contain a gene encoding a protein that is related to stanniocalcin (STC), a hormone previously considered to be present only in bony fish where it plays a major role in Ca2+ homeostasis. Here we report the identification in the mouse and human of a cDNA, STC-2, that shows signif...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(98)00097-5
更新日期:1998-06-25 00:00:00
abstract::The NAD+ dependent (K or type 2) isozyme of 11 beta-hydroxysteroid dehydrogenase oxidizes glucocorticoids and thus prevents them from occupying mineralocorticoid receptors. Mutations in the HSD11K (HSD11B2) gene encoding this isozyme cause a genetic form of hypertension, the syndrome of apparent mineralocorticoid exce...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(96)03855-5
更新日期:1996-07-23 00:00:00