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ALK4-SMAD3/4 mediates the effects of activin A on the upregulation of PAI-1 in human granulosa lutein cells
Publication date: Available online 23 January 2020Source: Molecular and Cellular EndocrinologyAuthor(s): Beili Chen, Hsun-Ming Chang, Zhiguo Zhang, Yunxia Cao, Peter C.K. LeungAbstractIn the mammalian ovary, the proteolysis of the extracellular matrix is dynamically regulated by plasminogen activator and plasminogen activator inhibitor (PAI), and it is a critical event that influences various physiological and pathological processes. Activin A is a member of the transforming growth factor-β superfamily and is expressed at a high level in human luteal cells that play an essential role in the regulation of the luteal functi...
Source: Molecular and Cellular Endocrinology - January 24, 2020 Category: Endocrinology Source Type: research

LncRNA HCP5 promotes cell proliferation and inhibits apoptosis via miR-27a-3p/IGF-1 axis in human granulosa-like tumor cell line KGN
This study aimed to reveal the potential roles of long non-coding RNA HCP5 (lncRNA HCP5) and its potential molecular mechanism in polycystic ovarian syndrome (PCOS). The human granulosa-like tumor cell line KGN was used for assessing the effects of HCP5 in the proliferation and apoptosis of granulosa cells (GCs). The results showed that downregulation of HCP5 suppressed cell proliferation through arresting cell cycle progression at G1 phase, and induced the apoptosis via activating mitochondrial pathway, while overexpression of HCP5 played the opposite effects in KGN cells. We predicted and confirmed miR-27a-3p was a direc...
Source: Molecular and Cellular Endocrinology - December 29, 2019 Category: Endocrinology Source Type: research

Involvement of CREB-regulated transcription coactivators (CRTC) in transcriptional activation of steroidogenic acute regulatory protein (Star) by ACTH
Publication date: Available online 8 October 2019Source: Molecular and Cellular EndocrinologyAuthor(s): Lorna I.F. Smith, Victoria Huang, Mark Olah, Loc Trinh, Ying Liu, Georgina Hazell, Becky Conway-Campbell, Zidong Zhao, Antoine Martinez, Anne-Marie Lefrançois-Martinez, Stafford Lightman, Francesca Spiga, Greti AguileraAbstractStudies in vivo have suggested the involvement of CREB-regulated transcription coactivator (CRTC)2 on ACTH-induced transcription of the key steroidogenic protein, Steroidogenic Acute Regulatory (StAR). The present study uses two ACTH-responsive adrenocortical cell-lines, to examine the role of CRT...
Source: Molecular and Cellular Endocrinology - October 9, 2019 Category: Endocrinology Source Type: research

Oxidative stress increases the 17,20-lyase-catalyzing activity of adrenal P450c17 through p38α in the development of hyperandrogenism
Publication date: Available online 23 January 2019Source: Molecular and Cellular EndocrinologyAuthor(s): Wenjiao Zhu, Bing Han, Mengxia Fan, Nan Wang, Hao Wang, Hui Zhu, Tong Cheng, Shuangxia Zhao, Huaidong Song, Jie QiaoAbstractUnexplained hyperandrogenic oligoanovulation is a main feature of polycystic ovary syndrome (PCOS). P450c17 phosphorylation selectively increases 17,20-lyase activity and androgen biosynthesis but minimally affects 17α-hydroxylase. Studies have recently identified mitogen-activated protein kinase 14 (MAPK14, p38α) as the kinase responsible for enhancing 17,20-lyase activity through P450c17 phosph...
Source: Molecular and Cellular Endocrinology - January 23, 2019 Category: Endocrinology Source Type: research

Cellular prion protein regulates the differentiation and function of adipocytes through autophagy flux
In this study, we investigated whether normal cellular prion protein (PrP<C>) is involved in the modulation of autophagy and affects adipogenic differentiation in vivo and in vitro. Surprisingly, autophagy flux signals were activated in the adipose tissue of prion protein-deficient mice and PrP<C>-deleted 3T3-L1 adipocytes. The activation of autophagy flux mediated by PrP<C> deletion was confirmed in the adipose tissue via transmission electron microscopy. Adipocyte differentiation factors were highly induced in prion protein-deficient adipose tissue and 3T3-L1 adipocytes. In addition, deletion of prion protein...
Source: Molecular and Cellular Endocrinology - December 2, 2018 Category: Endocrinology Source Type: research

Participation of NADPH 4 oxidase in thyroid regulation
Publication date: Available online 11 October 2018Source: Molecular and Cellular EndocrinologyAuthor(s): Romina Oglio, Leonardo Salvarredi, Luciano Rossich, Silvia Copelli, Mario Pisarev, Guillermo Juvenal, Lisa ThomaszAbstractDifferent factors are involved in thyroid function and proliferation such as thyrotropin (TSH), insulin, growth factors, iodide, etc. TSH and IGF1/insulin increase proliferation rate and stimulate genes involved in thyroid differentiation. In the present study, we analyse the physiological regulation of NOX4 expression by TSH, insulin and iodine, and the role of NOX4 on thyroid genes expression. Diff...
Source: Molecular and Cellular Endocrinology - October 12, 2018 Category: Endocrinology Source Type: research

Novel ABCA1 peptide agonists with antidiabetic action
Publication date: Available online 2 October 2018Source: Molecular and Cellular EndocrinologyAuthor(s): Salman Azhar, Stefanie Bittner, Jie Hu, Wen-Jun Shen, Yuan Cortez, Xiao Hao, Han Lu, Jens O. Lagerstedt, Fredric B. Kraemer, Jan O. JohanssonAbstractPreviously, apoE-derived ABCA1 agonist peptides have been shown to possess anti-atherosclerotic and possibly antidiabetic properties. Here we assessed the in vitro and in vivo actions of a second generation of ABCA1 peptide agonists, CS6253 and T6991-2, on glucose homeostasis. The results show that these two peptides improve glucose tolerance in a prediabetic diet-induced ob...
Source: Molecular and Cellular Endocrinology - October 5, 2018 Category: Endocrinology Source Type: research

SIRT1 suppresses high glucose and palmitate-induced osteoclast differentiation via deacetylating p66Shc
In conclusion, this study confirms the role of DM in osteoclast differentiation in vitro. SIRT1 suppresses HG- and PA-induced osteoclast differentiation via p66Shc/ROS/NF-κB signaling.
Source: Molecular and Cellular Endocrinology - July 21, 2018 Category: Endocrinology Source Type: research

Vitamin D suppresses macrophage infiltration by down-regulation of TREM-1 in diabetic nephropathy rats
This study intends to investigate the effect of active vitamin D (VD) on the expression of triggering receptor expressed on myeloid cells-1 (TREM-1) in the renal tissues of diabetic nephropathy (DN) rats and to explore the impact of TREM-1 on macrophage adhesion and migration. We find that the expressions of TREM-1 and CD68 protein are higher in DN rats compared with rats in the normal control group and that these changes are decreased in the DN + VD group. In vitro, the capacity for macrophage adhesion and migration and the expression of TREM-1 are increased under high-glucose conditions, but VD inhibits this progress....
Source: Molecular and Cellular Endocrinology - July 10, 2018 Category: Endocrinology Source Type: research

Oxytocin alters the morphology of hypothalamic neurons via the transcription factor myocyte enhancer factor 2A (MEF-2A)
In this study, we present evidence for three hypotheses: 1) OT leads to neurite retraction in hypothalamic neurons via the OT receptor (OTR) 2) The transcription factor MEF-2A is a central regulator of OT-induced neurite retraction, and 3) The MAPK pathway is critical for OT-induced MEF-2A activation.Incubation of rat hypothalamic H32 cells with 10 nM to 1 μM OT, vasopressin, and the specific OTR agonist TGOT, over the course of 12 h resulted in a time-dependent, significant retraction of neurites. In addition, the size of the nuclear compartment increased, whereas the overall cell size remained unchanged. OT trea...
Source: Molecular and Cellular Endocrinology - July 10, 2018 Category: Endocrinology Source Type: research

Estrogen receptor beta signaling inhibits PDGF induced human airway smooth muscle proliferation
In this study, we evaluated the effect of selective ERα and ERβ modulators on platelet-derived growth factor (PDGF)-stimulated ASM proliferation and the mechanisms involved. Asthmatic and non-asthmatic primary human ASM cells were treated with PDGF, 17β-estradiol, ERα-agonist and/or ERβ-agonist and/or G-protein-coupled estrogen receptor 30 (GPR30/GPER) agonist and proliferation was measured using MTT and CyQuant assays followed by cell cycle analysis. Transfection of small interfering RNA (siRNA) ERα and ERβ significantly altered the human ASM proliferation. The specificity of siRNA transfection was confirmed by Wes...
Source: Molecular and Cellular Endocrinology - July 10, 2018 Category: Endocrinology Source Type: research

Vitamin D suppresses macrophage infiltration by down-regulation of TREM-1 in diabetic nephropathy rats
This study intends to investigate the effect of active vitamin D (VD) on the expression of triggering receptor expressed on myeloid cells-1 (TREM-1) in the renal tissues of diabetic nephropathy (DN) rats and to explore the impact of TREM-1 on macrophage adhesion and migration. We find that the expressions of TREM-1 and CD68 protein are higher in DN rats compared with rats in the normal control group and that these changes are decreased in the DN + VD group. In vitro, the capacity for macrophage adhesion and migration and the expression of TREM-1 are increased under high-glucose conditions, but VD inhibits this progress....
Source: Molecular and Cellular Endocrinology - July 10, 2018 Category: Endocrinology Source Type: research

Oxytocin alters the morphology of hypothalamic neurons via the transcription factor myocyte enhancer factor 2A (MEF-2A)
In this study, we present evidence for three hypotheses: 1) OT leads to neurite retraction in hypothalamic neurons via the OT receptor (OTR) 2) The transcription factor MEF-2A is a central regulator of OT-induced neurite retraction, and 3) The MAPK pathway is critical for OT-induced MEF-2A activation.Incubation of rat hypothalamic H32 cells with 10 nM to 1 μM OT, vasopressin, and the specific OTR agonist TGOT, over the course of 12 h resulted in a time-dependent, significant retraction of neurites. In addition, the size of the nuclear compartment increased, whereas the overall cell size remained unchanged. OT trea...
Source: Molecular and Cellular Endocrinology - July 5, 2018 Category: Endocrinology Source Type: research

Estrogen receptor beta signaling inhibits PDGF induced human airway smooth muscle proliferation
In this study, we evaluated the effect of selective ERα and ERβ modulators on platelet-derived growth factor (PDGF)-stimulated ASM proliferation and the mechanisms involved. Asthmatic and non-asthmatic primary human ASM cells were treated with PDGF, 17β-estradiol, ERα-agonist and/or ERβ-agonist and/or G-protein-coupled estrogen receptor 30 (GPR30/GPER) agonist and proliferation was measured using MTT and CyQuant assays followed by cell cycle analysis. Transfection of small interfering RNA (siRNA) ERα and ERβ significantly altered the human ASM proliferation. The specificity of siRNA transfection was confirmed by Wes...
Source: Molecular and Cellular Endocrinology - July 5, 2018 Category: Endocrinology Source Type: research

SIRT1 suppresses high glucose and palmitate-induced osteoclast differentiation via deacetylating p66Shc
In conclusion, this study confirms the role of DM in osteoclast differentiation in vitro. SIRT1 suppresses HG- and PA-induced osteoclast differentiation via p66Shc/ROS/NF-κB signaling.
Source: Molecular and Cellular Endocrinology - July 5, 2018 Category: Endocrinology Source Type: research

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