Abstract：
:The age-related evolution of the in vitro effects of a gonadotropin releasing hormone agonist ([D-Trp6]-GnRH) on the secretion of testosterone by the testis, cultured during 3 days on a Millipore filter floating on M199 medium, was studied during the perinatal period in the rat. The basal and luteinizing hormone (LH)-stimulated secretions by testes explanted on fetal day 14.5 were unaffected by the agonist. With fetal testes explanted on days 16.5 and 18.5 post-conception, the agonist inhibited, in a concentration-dependent manner, both basal and LH-stimulated secretions from the second or the third day of treatment onwards. With fetal and neonatal testes explanted on days 20.5, 21.5 and 31.5 post-conception, the GnRH agonist also had a long-term inhibitory effect on LH-stimulated secretion, but increased basal secretion. This stimulatory effect was already observed after 4 h of culture, and was maintained for 3 days. These results suggest that, during fetal development, the cellular mechanisms involved in the negative testicular response to GnRH are differentiated 3-5 days before those involved in the positive response. Lastly, after 3 days of preculture in hormone-free medium, fetal testes explanted on day 14.5 displayed long-term GnRH agonist inhibition of in vitro basal secretion of testosterone. This observation points out a spontaneous differentiation of the negative responsiveness to GnRH in the cultured fetal testis.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Habert R,Devif I,Gangnerau MN,Lecerf Ldoi
10.1016/0303-7207(91)90032-nsubject
Has Abstractpub_date
1991-12-01 00:00:00pages
199-206issue
2-3eissn
0303-7207issn
1872-8057pii
0303-7207(91)90032-Njournal_volume
82pub_type
杂志文章abstract：:The effects of cytochalasin D on basal and adrenocorticotropin (ACTH)-stimulated steroid production as well as stress fiber organization by bovine adrenocortical (BAC) cells grown in monolayer culture have been investigated. Corticosteroid and pregnenolone release was determined by use of radioimmunoassay. The additio...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(84)90016-9
更新日期：1984-05-01 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 concentration of high-affinity estradiol binding sites in the uteri and pituitaries of normal and two dwarf strains of mice was studied. The two dwarf strains are characterized by their total absence of growth hormone or prolactin synthesis and low or absent TSH production. The uteri of the dwarf mice are small bu...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(83)90007-2
更新日期：1983-01-01 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：:Stanniocalcin-1 (STC-1) is made by kidney collecting duct cells for autocrine and paracrine targeting of nephron cell mitochondria. Here, the ligand stimulates respiratory uncoupling and calcium uniport activity. However, the underlying purpose of these actions and how the renal gene is regulated are poorly understood...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2010.09.010
更新日期：2011-01-01 00:00:00
abstract：:In order to study the distribution of LH (HCG) receptors on luteal cells ferritin was coupled to ovine LH with glutaraldehyde and purified by gel chromatography. The conjugate (FELH) competed with 125I-hCG for binding to isolated luteal membranes and stimulated a dose-dependent release of progesterone (P) from isolate...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(79)90008-x
更新日期：1979-08-01 00:00:00
abstract：:The reduction in muscle mass and strength with age, sarcopenia, is a prevalent condition among the elderly, linked to skeletal muscle dysfunction and cell apoptosis. We demonstrated that testosterone protects against H2O2-induced apoptosis in C2C12 muscle cells. Here, we analyzed the effect of testosterone on mitochon...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2019.110631
更新日期：2020-01-15 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：:Granulosa cell (GC) expressed androgen receptors (AR) and intrafollicular androgens are central to fertility. The transactivating domain of the AR contains a polymorphic CAG repeat sequence, which is linked to the transcriptional activity of AR and may influence the GC function. This study aims to evaluate the effects...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2015.09.015
更新日期：2016-01-05 00:00:00
abstract：:Signaling pathways initiated by transforming growth factor-β (TGF-β) and insulin-like growth factors (IGFs) are important in osteosarcoma cell growth. We have investigated a role for endogenous IGF binding protein-3 (IGFBP-3) in mediating cross-talk between TGF-β receptor and type I IGF receptor (IGF1R) signaling path...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2013.06.033
更新日期：2013-09-05 00:00:00
abstract：:In two sublines of the estrogen receptor-positive human breast cancer cell line, MCF-7, propagated with 0.5% fetal calf serum (FCS) (subline 0.5) and without serum (subline 9), respectively, addition of 10% newborn calf serum (NCS) inhibits cell proliferation and stimulates the secretion of a 42 kDa protein. Both with...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(89)90016-6
更新日期：1989-04-01 00:00:00
abstract：:In a model of pulmonary hypertension induced by a single injection of monocrotaline (MCT), we observed a time-dependent right ventricular hypertrophy, which became apparent in treated rats 21 days after administration of MCT and progressed through day 45. Associated with this right ventricular hypertrophy were time-de...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(89)90011-7
更新日期：1989-04-01 00:00:00
abstract：:Clinical observations indicate that elevated aldosterone impairs cardiovascular function. The mechanisms, however, are not totally understood although total and cardiovascular mortality are decreased by aldosterone antagonists. Experimentally, increased plasma aldosterone induces pericoronary inflammation and cardiac ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2003.10.022
更新日期：2004-03-31 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：: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：:To elucidate the molecular mechanism in relation to vascular supply and osteoporosis, we investigated the effect of hypoxia on Runx2 expression in MG63 cells. Also investigated was expression of type I collagen and osteocalcin, which are regulated by Runx2, alkaline phosphatase (ALPase) to see if they are affected by ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(02)00036-9
更新日期：2002-06-28 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：: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：:Pig oocytes matured in vitro are parthenogenetically activated after treatment with nitric oxide (NO)-donor SNAP. The chelation of intracellular calcium ions with BAPTA-AM suppressed the SNAP-induced activation in a dose-dependent manner. Activation by a NO-donor is dependent on the influx of calcium from extracellula...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2005.05.004
更新日期：2005-10-20 00:00:00
abstract：:The mouse mammary tumor virus (MMTV) initiates infection when the envelope protein, gp52, binds to a cell surface protein and triggers internalization. The hormonal regulation of this protein was studied both in vitro and in vivo. In mammary gland explant culture, levels of the MMTV binding protein were maintained onl...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(91)90024-m
更新日期：1991-12-01 00:00:00
abstract：:The regulation of human implantation is not fully understood. hCG as one of the earliest embryonal signals may be a major regulator in the parakrine embryo-endometrial communication. The expression of full-length hCG/LH-receptor mRNA could be demonstrated in human endometrium throughout the follicular and secretory ph...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2006.09.016
更新日期：2007-04-15 00:00:00
abstract：:The present study utilizes in situ molecular hybridization and immunocytochemistry to investigate the follicular localization and expression of four thematically related sterol-metabolizing genes; low-density lipoprotein (LDL) receptor, steroidogenic acute regulatory protein (StAR), cytochrome P450 side-chain cleavage...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(00)00332-4
更新日期：2000-12-22 00:00:00
abstract：:Androgen receptor mRNA was translated in vitro, and androgen- and antiandrogen-bound receptor complexes were studied using limited proteolytic digestion by trypsin. Partial proteolysis of androgen-bound receptor protein resulted in a 29-kDa proteolysis-resisting fragment, whereas antiandrogen binding stabilised a 35-k...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(94)90112-0
更新日期：1994-06-01 00:00:00
abstract：:Allatostatins, peptides with an YXFGL-amide C-terminus, cause a rapid and reversible inhibition of the sesquiterpenoid juvenile hormone III biosynthesis by cockroach corpora allata in vitro. Inhibition is relieved by farnesol and by mevalonate, and neither HMG-CoA reductase nor HMG-CoA synthesis (HMG-CoA synthase and ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(96)03825-7
更新日期：1996-07-01 00:00:00
abstract：:The presence of insulin resistance is increasingly recognized as an important contributor to early stage kidney disease independent of the contribution of diabetes. Important in this relationship is the strong correlation between hyperinsulinemia and low levels of albuminuria (e.g. microalbuminuria). Recent work highl...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2013.02.005
更新日期：2013-09-25 00:00:00
abstract：:The juvenoid, methyl farnesoate (MF), is synthesized in the mandibular organs (MOs) of crustaceans, under the control of mandibular organ-inhibiting hormone (MO-IH). Using an in vitro assay to measure synthesis of MF by MOs, the effect of a variety of agents that affect signal transduction pathways was investigated. O...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/s0303-7207(99)00090-8
更新日期：1999-08-20 00:00:00
abstract：:Adenomas and nodules of the human adrenal cortex are common, whereas adrenocortical carcinomas are rare. Genes such as IGF2 have been suggested to be important in human adrenocortical tumorigenesis but their role has not been directly investigated. We describe here elements of a system in which hypotheses concerning t...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.mce.2008.10.046
更新日期：2009-03-05 00:00:00
abstract：:We have previously reported that LHCGR expression in the ovary is regulated through a post-transcriptional mechanism involving an mRNA binding protein designated as LRBP, which is regulated, at least in part, by a non-coding RNA, miR-122. Our present study examined the regulatory role of miR-122 in FSH-induced LHCGR e...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/j.mce.2016.12.002
更新日期：2017-02-15 00:00:00
abstract：:Rat ovarian membrane luteinizing hormone/human chorionic gonadotropin (LH/hCG) receptor was reconstituted into proteoliposomes. The ability of sodium cholate to extract and reconstitute hCG binding activity was dependent on the protein/detergent ratio. Trypsinization of the LH/hCG receptor containing proteoliposomes i...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(92)90160-8
更新日期：1992-02-01 00:00:00
abstract：:Using hybridization techniques and Northern blots we have identified a approximately 6.5 kb glucocorticoid receptor mRNA species in rat pituitary intermediate lobe. Glucocorticoid receptor mRNA concentrations, which are barely detectable or undetectable in normal animals, were greatly increased following ovariectomy. ...
journal_title：Molecular and cellular endocrinology
pub_type： 杂志文章
doi：10.1016/0303-7207(88)90125-6
更新日期：1988-02-01 00:00:00
