Abstract:
:Using as a model system, primary cultures of porcine Leydig cells, we have shown that transforming growth factor-beta 1 (TGF-beta 1) (2 ng/ml, 72 h) antagonizes the stimulatory action of insulin-like growth factor-I (IGF-I) on luteinizing hormone (LH/hCG) receptors. We therefore investigated the action of TGF-beta 1 on the different components of the IGF system, namely, IGF-I, II, IGF binding proteins (IGFBPs) and IGF-I receptor present in testicular Leydig cells. TGF-beta 1 was shown to decrease in a dose and time dependent manner the binding of 125I-IGF-I to Leydig cells. The maximal (40% decrease) effect was obtained with 1.3 ng/ml (0.05 nM) after 72 h of treatment. Such a decrease in IGF-I binding by TGF-beta 1 treatment was shown to be related to the number of receptor but not to their affinity. Affinity labeling of these receptors by covalently binding them to 125I-IGF-I with disuccinimidyl suberate and subsequent electrophoretic analysis of the labeled complex revealed that the inhibitory action of TGF-beta 1 (2 ng/ml, 72 h) occurs at the level of a 135 kDa protein which represents the classical form of the binding subunit of the IGF-I receptor. Moreover, our study indicates that TGF-beta 1 was unable to affect the other components of the IGF system in cultured porcine Leydig cells.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Besset V,Collette J,Chauvin MA,Franchimont P,Benahmed Mdoi
10.1016/0303-7207(94)90015-9subject
Has Abstractpub_date
1994-03-01 00:00:00pages
251-7issue
2eissn
0303-7207issn
1872-8057pii
0303-7207(94)90015-9journal_volume
99pub_type
杂志文章abstract::Glucose transport activity ([3H]D-glucose uptake) in liver sinusoidal membrane vesicles (SMVs) from hyperthyroid rats was significantly higher than that from euthyroid controls (2.1-times increase in V(max) with K(m) unchanged at approximately 18 mM), associated with increased GLUT2 expression. In contrast, glucose tr...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(97)04026-4
更新日期:1997-04-04 00:00:00
abstract::Four abundant cDNA clones have been isolated from a rat epididymal cDNA library. Northern blot analysis has shown that these clones partially encode 4.5 kb, 2.8 kb, 1.2 kb and 0.85 kb mRNAs and that their expression is not detectable in total RNA preparations from heart, kidney, liver or testis. Fourteen days after ca...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(90)90205-m
更新日期:1990-11-12 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 临床试验,杂志文章
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更新日期:2007-01-29 00:00:00
abstract::Many agrochemicals have endocrine disrupting properties. A subset of these chemicals is characterized as "estrogenic". In this review, we describe several distinct ways that chemicals used in crop production can affect estrogen signaling. Using three agrochemicals as examples (DDT, endosulfan, and atrazine), we illust...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2020.110860
更新日期:2020-12-01 00:00:00
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 transcriptio...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(96)03815-4
更新日期:1996-05-31 00:00:00
abstract::The role of protein kinase C (PKC) isoforms (PKCs) in GnRH-stimulated MAPK [ERK1/2, JNK1/2 and p38) phosphorylation was examined in gonadotrope derived cells. GnRH induced a protracted activation of ERK1/2 and a slower and more transient activation of JNK1/2 and p38MAPK. Gonadotropes express conventional PKCα and PKCβ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2017.04.004
更新日期:2018-03-05 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2016.01.020
更新日期:2016-03-15 00:00:00
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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
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2018.10.013
更新日期:2019-01-15 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(88)90084-6
更新日期:1988-01-01 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(02)00416-1
更新日期:2003-02-28 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(89)90141-x
更新日期:1989-07-01 00:00:00
abstract::Fibroblast growth factor (FGF)-21 is an endocrine member of the FGF family with healthy effects on glucose and lipid metabolism. FGF21 reduces glycemia and lipidemia in rodent models of obesity and type 2 diabetes. In addition to its effects improving insulin sensitivity, FGF21 causes weight loss by increasing energy ...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2015.09.018
更新日期:2015-12-15 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2011.08.030
更新日期:2011-12-05 00:00:00
abstract::The aim of this study is to further characterize the prolactin receptors (PRL-R) previously reported in the murine Leydig tumor MA-10 cell line, as well as to study their homologous and heterologous regulation. Two forms of PRL-R, a high and a low molecular weight form, were revealed by studies of covalent crosslinkin...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(98)00134-8
更新日期:1998-08-25 00:00:00
abstract::The effects of calcitonin (CT) on the cellular transport and accumulation of Ca were studied in bone cells grown in primary culture. The following sequence of events was detected: (1) After 1--2 h of incubation with CT the initial rate of Ca influx into bone cells transiently increased. A longer incubation with CT (3-...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(80)90067-2
更新日期:1980-06-01 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2009.10.017
更新日期:2010-02-05 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
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journal_title:Molecular and cellular endocrinology
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更新日期:2019-03-15 00:00:00
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journal_title:Molecular and cellular endocrinology
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doi:10.1016/s0303-7207(03)00234-x
更新日期:2003-08-29 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2011.04.013
更新日期:2011-06-20 00:00:00
abstract::We have investigated protein kinase C (PKC) regulation by 1,25-(OH)2D3 in the rat osteosarcoma cell line ROS 17/2.8 since previous reports have implicated PKC in the 1,25-(OH)2D3-mediated regulation of osteocalcin gene expression (J. Biol. Chem. 267 (1992) 12562; Endocrinology 136 (1995) 5685). Here we report that 1,2...
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doi:10.1016/s0303-7207(01)00670-0
更新日期:2002-02-25 00:00:00
abstract::It has recently been reported that phenol red, a pH indicator present in most tissue culture media, is a weak estrogen that can stimulate some estrogen-sensitive cells. However, the relative impact of phenol red on various cell lines is controversial. We examined the effect of phenol red on several estrogen-responsive...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/0303-7207(88)90072-x
更新日期:1988-06-01 00:00:00
abstract::Granulosa cells of small follicles differentiate in vitro in serum-free medium, resulting in increased estradiol secretion and abundance of mRNA encoding cytochrome P450aromatase (P450arom). We tested the hypothesis that differentiation in vitro also involves increased expression of 3beta- and 17beta-hydroxysteroid de...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2004.05.010
更新日期:2004-08-31 00:00:00
abstract::Northern blot analysis of total RNA from a variety of rabbit tissues indicated that placenta is the primary site of expression of the protein hormone relaxin (previously called SQ10) in rabbits. Relaxin was not detected by this method in other rabbit tissues, including normal trachea and several squamous tissues. Howe...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(98)00013-6
更新日期:1998-03-16 00:00:00
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journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2014.08.012
更新日期:2015-01-05 00:00:00
abstract::Prostate cancer (PCa) is a major health issue in the Western world. Current clinical imperatives for this disease include better stratification of indolent versus aggressive disease to enable improved patient management, as well as the identification of more effective therapies for the prevention and treatment of meta...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章,评审
doi:10.1016/j.mce.2018.10.023
更新日期:2019-01-15 00:00:00
abstract::We investigated the involvement of protein synthesis in the stimulatory action of thyroid hormones on amino acid accumulation and characterized K(+) currents involved in the hyperpolarizing effect of thyroxine (T(4)) on Sertoli cells. Immature rat testes were incubated in Krebs Ringer-bicarbonate buffer (KRb) in the p...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2005.11.019
更新日期:2006-02-26 00:00:00
abstract::Transforming growth factor beta (TGF-beta) is a member of a family of cytokines that regulate differentiation and proliferation in a wide variety of tissues including the pituitary gland. In both the normal pituitary and tumorous cell lines TGF-beta1 has anti-proliferative activity, however the intracellular mechanism...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/s0303-7207(01)00477-4
更新日期:2001-05-15 00:00:00
abstract::Adipose tissue-derived adipokines play important roles as regulators of skeletal growth and development. CTRP1, a paralog of adiponectin, is a member of the C1q and tumor necrosis factor (TNF)-related protein (CTRP) superfamily. It is expressed at high levels in adipose tissue and has recently emerged as a novel adipo...
journal_title:Molecular and cellular endocrinology
pub_type: 杂志文章
doi:10.1016/j.mce.2013.01.002
更新日期:2013-04-30 00:00:00