1
|
Yan S, Wang Y, Wang B, Zuo S, Yu Y. Thromboxane A 2 Modulates de novo Synthesis of Adrenal Corticosterone in Mice via p38/14-3-3γ/StAR Signaling. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307926. [PMID: 38460156 PMCID: PMC11095200 DOI: 10.1002/advs.202307926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/21/2024] [Indexed: 03/11/2024]
Abstract
Prostanoids are endogenous lipid bioactive mediators that play essential roles in physiological processes such as glucocorticoid secretion. Here, it is found that the thromboxane (Tx)A2 receptor (TP) is highly expressed in the adrenal cortex of mice. Both global and adrenocortical-specific deletion of the TP receptor lead to increased adiposity in mice by elevating corticosterone synthesis. Mechanistically, the TP receptor deletion increases the phosphorylation of steroidogenic acute regulatory protein (StAR) and corticosterone synthesis in adrenal cortical cells by suppressing p-p38-mediated phosphorylation of 14-3-3γ adapter protein at S71. The activation of the p38 in the adrenal cortical cells by forced expression of the MKK6EE gene attenuates hypercortisolism in TP-deficient mice. These observations suggest that the TxA2/TP signaling regulates adrenal corticosterone homeostasis independent of the hypothalamic-pituitary-adrenal axis and the TP receptor may serve as a promising therapeutic target for hypercortisolism.
Collapse
Affiliation(s)
- Shuai Yan
- Department of PharmacologyTianjin Key Laboratory of Inflammatory BiologyState Key Laboratory of Experimental HematologyKey Laboratory of Immune Microenvironment and Disease (Ministry of Education)The Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical SciencesTianjin Medical UniversityTianjin300070P. R. China
- Division of Endocrinology, Diabetes, and MetabolismBeth Israel Deaconess Medical CenterHarvard Medical School330 Brookline AvenueBostonMassachusetts02115USA
| | - Yuanyang Wang
- Department of PharmacologyTianjin Key Laboratory of Inflammatory BiologyState Key Laboratory of Experimental HematologyKey Laboratory of Immune Microenvironment and Disease (Ministry of Education)The Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical SciencesTianjin Medical UniversityTianjin300070P. R. China
| | - Bei Wang
- Department of PharmacologyTianjin Key Laboratory of Inflammatory BiologyState Key Laboratory of Experimental HematologyKey Laboratory of Immune Microenvironment and Disease (Ministry of Education)The Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical SciencesTianjin Medical UniversityTianjin300070P. R. China
| | - Shengkai Zuo
- Department of PharmacologyTianjin Key Laboratory of Inflammatory BiologyState Key Laboratory of Experimental HematologyKey Laboratory of Immune Microenvironment and Disease (Ministry of Education)The Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical SciencesTianjin Medical UniversityTianjin300070P. R. China
- Department of BiopharmaceuticsTianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and DiagnosticsSchool of PharmacyTianjin Medical UniversityTianjin300070P. R. China
| | - Ying Yu
- Department of PharmacologyTianjin Key Laboratory of Inflammatory BiologyState Key Laboratory of Experimental HematologyKey Laboratory of Immune Microenvironment and Disease (Ministry of Education)The Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical SciencesTianjin Medical UniversityTianjin300070P. R. China
| |
Collapse
|
2
|
Li J, Lei Y, Zhao Y. Metallothionein-2A Protects Cardiomyocytes from Hypoxia/reper-Fusion through Inhibiting p38. Cell Biochem Biophys 2023; 81:69-75. [PMID: 36445616 DOI: 10.1007/s12013-022-01118-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 11/11/2022] [Indexed: 11/30/2022]
Abstract
The reperfusion of coronary artery blood supply is often accompanied by myocardial hypoxia/reperfusion (H/R) injury, and induced cardiomyocytes apoptosis. The activation of p38 can induce apoptosis, thereby aggravating the myocardial H/R injury. Metallothionein-2A (MT2A) has the functions of anti-apoptosis and protective effect through p38. However, it is not clear that MT2A may protect cardiomyocytes from H/R injury through p38 signaling pathway. Here, we constructed an H/R model for H9c2 cardiomyocytes to explore the protective effect of MT2A on cardiomyocytes apoptosis during the process of H/R through p38 signal pathway. The results revealed that both endogenously overexpressed MT2A and exogenously added MT2A can inhibit the active expression of p-p38 and cleaved caspase-3 under H/R. Based on our results, H/R induced cardiomyocytes apoptosis and activation of p38. And, MT2A can inhibit the active expression of caspase-3 and p38. We found that MT2A can protect cardiomyocytes apoptosis from H/R injury through p38 signaling pathway.
Collapse
Affiliation(s)
- Jike Li
- Cardiovascular Department, Xi'an Hospital of Traditional Chinese Medicine, No. 69, Fengcheng 8th Road, Weiyang District, Xi'an, Shaanxi Province, 710021, China
| | - Yuanlin Lei
- Cardiovascular Department, Xi'an Hospital of Traditional Chinese Medicine, No. 69, Fengcheng 8th Road, Weiyang District, Xi'an, Shaanxi Province, 710021, China
| | - Ying Zhao
- Cardiovascular Surgery Department, First Affiliated Hospital of Hainan Medical University, No. 31, Longhua Road, Haikou, Hainan Province, 570102, China.
| |
Collapse
|
3
|
Zhang X, Sun K, Wang X, Shi X, Gong D. Chlorpyrifos induces apoptosis and necroptosis via the activation of CYP450s pathway mediated by nuclear receptors in LMH cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:1060-1071. [PMID: 35908035 DOI: 10.1007/s11356-022-22285-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Chlorpyrifos (CPF), an organophosphorus pesticide, is detected commonly in environments, where it is thought to be highly toxic to non-target organisms. However, the mechanism of CYP450s pathway mediated by nuclear receptors on CPF-induced apoptosis and necroptosis at the cellular level and the effect of CPF on the cytotoxicity of the chicken hepatocarcinoma cell line (LMH) has also not been reported in detail. Therefore, this experiment aims to explore whether CPF can improve apoptosis and necroptosis in LMH cells by activating the nuclear receptors/CYP450s axis. LMH cells, the subject of this study, were exposed to 5 μg/mL, 10 μg/mL, and 15 μg/mL doses of CPF. With the increase of CPF concentration, the increase of nuclear receptor level led to the up-regulation of CYP450s activity. With the massive production of ROS, the expression of apoptotic pathway genes (Bax, Caspase9, and Caspase3) enhanced, while Bcl-2 expression dropped sharply. The expression of programmed necroptosis genes (RIPK1, RIPK3, and MLKL) heightened, and Caspase8 reduced considerably. In short, our data suggests that excessive activation of nuclear receptors and CYP450s induced by CPF promotes ROS production, which directs apoptosis and programmed necroptosis in LMH cells.
Collapse
Affiliation(s)
- Xinyu Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Kexin Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xu Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xu Shi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Duqiang Gong
- College of Jilin Agricultural Science and Technology University, Jilin, 132101, People's Republic of China.
| |
Collapse
|
4
|
Role of p38 MAPK Signalling in Testis Development and Male Fertility. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:6891897. [PMID: 36092154 PMCID: PMC9453003 DOI: 10.1155/2022/6891897] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 07/31/2022] [Accepted: 08/18/2022] [Indexed: 12/03/2022]
Abstract
The testis is an important male reproductive organ, which ensures reproductive function via the secretion of testosterone and the generation of spermatozoa. Testis development begins in the embryonic period, continues after birth, and generally reaches functional maturation at puberty. The stress-activated kinase, p38 mitogen-activated protein kinase (MAPK), regulates multiple cell processes including proliferation, differentiation, apoptosis, and cellular stress responses. p38 MAPK signalling plays a crucial role in testis development by regulating spermatogenesis, the fate determination of pre-Sertoli, and primordial germ cells during embryogenesis, the proliferation of testicular cells in the postnatal period, and the functions of mature Sertoli and Leydig cells. In addition, p38 MAPK signalling is involved in decreased male fertility when exposed to various harmful stimuli. This review will describe in detail the biological functions of p38 MAPK signalling in testis development and male reproduction, together with its pathological role in male infertility.
Collapse
|
5
|
Herta AC, Mengden L, Akin N, Billooye K, Coucke W, Leersum J, Cava-Cami B, Saucedo-Cuevas L, Klamt F, Smitz J, Anckaert E. Characterization of carbohydrate metabolism in in vivo and in vitro grown and matured mouse antral follicles. Biol Reprod 2022; 107:998-1013. [PMID: 35717588 DOI: 10.1093/biolre/ioac124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 02/14/2022] [Accepted: 06/12/2022] [Indexed: 11/13/2022] Open
Abstract
Establishing an ideal human follicle culture system for oncofertility patients relies mainly on animal models since donor tissue is scarce and often of suboptimal quality. The in vitro system developed in our laboratory supports the growth of prepubertal mouse secondary follicles up to mature oocytes. Given the importance of glucose in preparing the oocyte for proper maturation, a baseline characterization of follicle metabolism both in the culture system and in vivo was carried out. Markers of glucose-related pathways (glycolysis, tricarboxylic acid (TCA) cycle, pentose phosphate pathway (PPP), polyol pathway, hexosamine biosynthesis pathway (HBP)) as well as for the antioxidant capacity were measured in the different follicle cell types by both enzymatic activities (spectrophotometric detection) and gene expression (qPCR). This study confirmed that in vivo the somatic cells, mainly granulosa, exhibit intense glycolytic activity, while oocytes perform PPP. Throughout the final maturation step, oocytes in vivo and in vitro showed steady levels for all the key enzymes and metabolites. On the other hand, ovulation triggers a boost of pyruvate and lactate uptake in cumulus cells in vivo, consumes reduced nicotinamide adenine dinucleotide phosphate (NADPH) and increases TCA cycle and small molecules antioxidant capacity (SMAC) activities, while in vitro, the metabolic upregulation in all the studied pathways is limited. This altered metabolic pattern might be a consequence of cell exhaustion because of culture conditions, impeding cumulus cells to fulfil their role in providing proper support for acquiring oocyte competence. SUMMARY SENTENCE: In vitro cultured mouse follicles exhibit altered glycolytic activity and redox metabolism in the somatic compartment during meiotic maturation.
Collapse
Affiliation(s)
- Anamaria-Cristina Herta
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Lucia Mengden
- Laboratory of Cellular Biochemistry, Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre (RS), 90035003, Brazil
| | - Nazli Akin
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Katy Billooye
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Wim Coucke
- Freelance statistician, Brugstraat 107, 3001 Heverlee, Belgium
| | - Julia Leersum
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Berta Cava-Cami
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Laura Saucedo-Cuevas
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Fábio Klamt
- Laboratory of Cellular Biochemistry, Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre (RS), 90035003, Brazil
| | - Johan Smitz
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| | - Ellen Anckaert
- Follicle Biology Laboratory (FOBI), Vrije Universiteit Brussel (VUB), Brussels, 1090, Belgium
| |
Collapse
|
6
|
Yu J, Wu Y, Li H, Zhou H, Shen C, Gao T, Lin M, Dai X, Ou J, Liu M, Huang X, Zheng B, Sun F. BMI1 Drives Steroidogenesis Through Epigenetically Repressing the p38 MAPK Pathway. Front Cell Dev Biol 2021; 9:665089. [PMID: 33928089 PMCID: PMC8076678 DOI: 10.3389/fcell.2021.665089] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 03/22/2021] [Indexed: 11/18/2022] Open
Abstract
Testosterone biosynthesis progressively decreases in aging males primarily as a result of functional changes to Leydig cells. Despite this, the mechanisms underlying steroidogenesis remain largely unclear. Using gene knock-out approaches, we and others have recently identified Bmi1 as an anti-aging gene. Herein, we investigate the role of BMI1 in steroidogenesis using mouse MLTC-1 and primary Leydig cells. We show that BMI1 can positively regulate testosterone production. Mechanistically, in addition to its known role in antioxidant activity, we also report that p38 mitogen-activated protein kinase (MAPK) signaling is activated, and testosterone levels reduced, in BMI1-deficient cells; however, the silencing of the p38 MAPK pathway restores testosterone production. Furthermore, we reveal that BMI1 directly binds to the promoter region of Map3k3, an upstream activator of p38, thereby modulating its chromatin status and repressing its expression. Consequently, this results in the inhibition of the p38 MAPK pathway and the promotion of steroidogenesis. Our study uncovered a novel epigenetic mechanism in steroidogenesis involving BMI1-mediated gene silencing and provides potential therapeutic targets for the treatment of hypogonadism.
Collapse
Affiliation(s)
- Jun Yu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Yibo Wu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Hong Li
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China
| | - Hui Zhou
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Cong Shen
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China
| | - Tingting Gao
- Center of Clinical Reproductive Medicine, The Affiliated Changzhou Maternity and Child Health Care Hospital of Nanjing Medical University, Changzhou, China
| | - Meng Lin
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Xiuliang Dai
- Center of Clinical Reproductive Medicine, The Affiliated Changzhou Maternity and Child Health Care Hospital of Nanjing Medical University, Changzhou, China
| | - Jian Ou
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China
| | - Meiling Liu
- National Health Commission Key Laboratory of Male Reproductive Health, National Research Institute for Family Planning, Beijing, China
| | - Xiaoyan Huang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Bo Zheng
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China.,National Health Commission Key Laboratory of Male Reproductive Health, National Research Institute for Family Planning, Beijing, China
| | - Fei Sun
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| |
Collapse
|
7
|
Akin N, von Mengden L, Herta AC, Billooye K, van Leersum J, Cava-Cami B, Saucedo-Cuevas L, Klamt F, Smitz J, Anckaert E. Glucose metabolism characterization during mouse in vitro maturation identifies alterations in cumulus cells†. Biol Reprod 2021; 104:902-913. [PMID: 33480981 DOI: 10.1093/biolre/ioab008] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/24/2020] [Accepted: 01/15/2021] [Indexed: 01/01/2023] Open
Abstract
In vitro maturation (IVM) is an assisted reproduction technique with reduced hormone-related side-effects. Several attempts to implement IVM in routine practice have failed, primarily due to its relatively low efficiency compared with conventional in vitro fertilization (IVF). Recently, capacitation (CAPA)-IVM-a novel two-step IVM method-has improved the embryology outcomes through synchronizing the oocyte nuclear and cytoplasmic maturation. However, the efficiency gap between CAPA-IVM and conventional IVF is still noticeable especially in the numerical production of good quality embryos. Considering the importance of glucose for oocyte competence, its metabolization is studied within both in vivo and CAPA-IVM matured mouse cumulus-oocyte-complexes (COCs) through direct measurements in both cellular compartments, from transcriptional and translational perspectives, to reveal metabolic shortcomings within the CAPA-IVM COCs. These results confirmed that within in vivo COC, cumulus cells (CCs) are highly glycolytic, whereas oocytes, with low glycolytic activity, are deviating their glucose towards pentose phosphate pathway. No significant differences were observed in the CAPA-IVM oocytes compared with their in vivo counterparts. However, their CCs exhibited a precocious increase of glycolytic activity during the pre-maturation culture step and activity was decreased during the IVM step. Here, specific alterations in mouse COC glucose metabolism due to CAPA-IVM culture were characterized using direct measurements for the first time. Present data show that, while CAPA-IVM CCs are able to utilize glucose, their ability to support oocytes during final maturation is impaired. Future CAPA-IVM optimization strategies could focus on adjusting culture media energy substrate concentrations and/or implementing co-culture strategies.
Collapse
Affiliation(s)
- Nazli Akin
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Lucia von Mengden
- Laboratory of Cellular Biochemistry, Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre (RS), Brazil
| | - Anamaria-Cristina Herta
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Katy Billooye
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Julia van Leersum
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Berta Cava-Cami
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Laura Saucedo-Cuevas
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Fabio Klamt
- Laboratory of Cellular Biochemistry, Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre (RS), Brazil
| | - Johan Smitz
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Ellen Anckaert
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| |
Collapse
|
8
|
L-Dopa-Decarboxylase (DDC) Is a Positive Prognosticator for Breast Cancer Patients and Epinephrine Regulates Breast Cancer Cell (MCF7 and T47D) Growth In Vitro According to Their Different Expression of Gi- Protein- Coupled Receptors. Int J Mol Sci 2020; 21:ijms21249565. [PMID: 33334070 PMCID: PMC7765554 DOI: 10.3390/ijms21249565] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 12/24/2022] Open
Abstract
A coherence between thyroid dysfunction and breast cancer incidence exists. Thyroid hormone metabolites bind to TAAR1 (trace amine-associated receptor 1) and through that modulate the serotonergic and dopaminergic system. Catecholamines themselves are synthesized by the L-dopa decarboxylase (DDC). The aim of our study was to analyze the influence of catecholamines on the DDC expression in primary breast cancer patients and the role of DDC concerning overall survival (OS). DDC expression was analyzed by immunohistochemistry. The effect of epinephrine on the expression of DDC and the Gi- protein was analyzed on the protein level via Western blot. A viability assay was performed to test the metabolic cell viability. The overexpression of DDC in the primary tumor was associated with longer OS (p = 0.03). Stimulation with epinephrine induced the downregulation of DDC (p = 0.038) and significantly increased viability in T47D cells (p = 0.028). In contrast, epinephrine induced an upregulation of DDC and decreased the proliferation of MCF7 cells (p = 0.028). Epinephrine led to an upregulation of Gi protein expression in MCF7 cells (p = 0.008). DDC is a positive prognostic factor for OS in breast cancer patients, and it is regulated through epinephrine differently in MCF7 and T47D. DDC may represent a novel target for the treatment of breast cancer, especially concerning its interaction with epinephrine.
Collapse
|
9
|
Ștefan MG, Kiss B, Gutleb AC, Loghin F. Redox metabolism modulation as a mechanism in SSRI toxicity and pharmacological effects. Arch Toxicol 2020; 94:1417-1441. [PMID: 32246176 DOI: 10.1007/s00204-020-02721-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 03/26/2020] [Indexed: 12/11/2022]
Abstract
Depressive disorders are amongst the greatest mental health challenges, with an increasing number of patients being diagnosed each year. Though it has not yet been fully elucidated, redox metabolism imbalances and oxidative stress seem to play a major role in the pathogenesis of depressive disorders. Selective serotonin reuptake inhibitors (SSRIs) are the most prescribed antidepressants, considered to have a better tolerability. However, several adverse effects have been reported and the mechanisms involved in their pharmacological activity are not entirely understood. SSRIs have been shown to influence the redox metabolism, which could be involved in their toxicity and pharmacological effects. A comparative analysis of published in vivo and in vitro data regarding the activity of SSRIs on the redox metabolism pathways has been performed in this paper, with an emphasis on mechanistical aspects. Furthermore, a comparison between oxidative stress biomarker levels reported by different studies was attempted. The reviewed data point towards both pro- and antioxidant effects of SSRIs, dependent on tissue/cell type and dose/concentration, suggest a redox modulating potential of these compounds. In hepatic and testicular tissue, the majority of reviewed studies reported pro-oxidant effects, with possible implications towards the hepatotoxicity and sexual dysfunction that were reported following SSRI treatment; while in brain, the most common findings were antioxidant effects that could partially explain their antidepressant activity. However, given the heterogeneity of the reviewed data, further research is needed to fully understand the impact of SSRIs on redox metabolism and its implications.
Collapse
Affiliation(s)
- Maria-Georgia Ștefan
- Toxicology Department, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Béla Kiss
- Toxicology Department, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania.
| | - Arno C Gutleb
- Toxicology Department, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania.,Luxembourg Institute of Science and Technology (LIST), Environmental Research and Innovation (ERIN) Department, Environmental Health Group, Esch-sur-Alzette, Luxembourg
| | - Felicia Loghin
- Toxicology Department, Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| |
Collapse
|
10
|
Sun X, Zhang C, Guo H, Chen J, Tao Y, Wang F, Lin X, Liu Q, Su L, Qin A. Pregnenolone Inhibits Osteoclast Differentiation and Protects Against Lipopolysaccharide-Induced Inflammatory Bone Destruction and Ovariectomy-Induced Bone Loss. Front Pharmacol 2020; 11:360. [PMID: 32292342 PMCID: PMC7135856 DOI: 10.3389/fphar.2020.00360] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/10/2020] [Indexed: 01/09/2023] Open
Abstract
Osteolytic bone disease is characterized by excessive osteoclast bone resorption leading to increased skeletal fragility and fracture risk. Multinucleated osteoclasts formed through the fusion of mononuclear precursors are the principle cell capable of bone resorption. Pregnenolone (Preg) is the grand precursor of most if not all steroid hormones and have been suggested to be a novel anti-osteoporotic agent. However, the effects of Preg on osteoclast biology and function has yet to be shown. Here we examined the effect of Preg on receptor activator of nuclear factor kappa B ligand (RANKL)-induced osteoclast formation and bone resorption in vitro, and potential therapeutic application in inflammatory bone destruction and bone loss in vivo. Our in vitro cellular assays demonstrated that Preg can inhibit the formation of TRAP+ve osteoclast formation as well as mature osteoclast bone resorption in a dose-dependent manner. The expression of osteoclast marker genes CTSK, TRAP, DC-STAMP, ATP6V0d2, and NFATc1 were markedly attenuated. Biochemical analyses of RANKL-induced signaling pathways showed that Preg inhibited the early activation of extracellular regulated protein kinases (ERK) mitogen-activated protein kinase (MAPK) and nuclear factor-κB, which consequently impaired the downstream induction of c-Fos and NFATc1. Using reactive oxygen species (ROS) detection assays, we found that Preg exhibits anti-oxidant properties inhibiting the generation of intracellular ROS following RANKL stimulation. Consistent with these in vitro results, we confirmed that Preg protected mice against local Lipopolysaccharide (LPS)-induced inflammatory bone destruction in vivo by suppressing osteoclast formation. Furthermore, we did not find any observable effect of Preg on osteoblastogenesis and mineralization in vitro. Finally Preg was administered to ovariectomy (OVX)-induced bone loss and demonstrated that Preg prevented systemic OVX-induced osteoporosis. Collectively, our observations provide strong evidence for the use of Preg as anti-osteoclastogenic and anti-resorptive agent for the potential treatment of osteolytic bone conditions.
Collapse
Affiliation(s)
- Xiaochen Sun
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Chenxi Zhang
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Huan Guo
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Jiao Chen
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Yali Tao
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Fuxiao Wang
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Xixi Lin
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Qian Liu
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Li Su
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - An Qin
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| |
Collapse
|
11
|
Zhang B, Zhu L, Dai Y, Li H, Huang K, Luo Y, Xu W. An in vitro attempt at precision toxicology reveals the involvement of DNA methylation alteration in ochratoxin A-induced G0/G1 phase arrest. Epigenetics 2019; 15:199-214. [PMID: 31314649 DOI: 10.1080/15592294.2019.1644878] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Precision toxicology evaluates the toxicity of certain substances by isolating a small group of cells with a typical phenotype of interest followed by a single cell sequencing-based analysis. In this in vitro attempt, ochratoxin A (OTA), a typical mycotoxin and food contaminant, is found to induce G0/G1 phase cell cycle arrest in human renal proximal tubular HKC cells at a concentration of 20 μM after a 24h-treatment. A small number of G0/G1 phase HKC cells are evaluated in both the presence and absence of OTA. These cells are sorted with a flow cytometer and subjected to mRNA and DNA methylation sequencing using Smart-Seq2 and single-cell reduced-representation bisulfite sequencing (scRRBS) technology, respectively. Integrated analysis of the transcriptome and methylome profiles reveals that OTA causes abnormal expression of the essential genes that regulate G1/S phase transition, act as signal transductors in G1 DNA damage checkpoints, and associate with the anaphase-promoting complex/cyclosome. The alteration of their DNA methylation status is a significant underlying epigenetic mechanism. Furthermore, Notch signaling and Ras/MAPK/CREB pathways are found to be suppressed by OTA. This attempt at precision toxicology paves the way for a deeper understanding of OTA toxicity and provides an innovative strategy to researchers in the toxicology and pharmacology field.
Collapse
Affiliation(s)
- Boyang Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Liye Zhu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yaqi Dai
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Hongyu Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Kunlun Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| | - Yunbo Luo
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| |
Collapse
|
12
|
Liu SC, Huang CM, Chang YL, Bamodu OA, Yeh CT, Wang HW, Lee FP, Lin CS. Ovatodiolide suppresses inflammatory response in BEAS-2B cells by regulating the CREB/AQP5 pathway, and sensitizes nasopharyngeal carcinoma cells to radiation therapy. Eur J Pharmacol 2019; 859:172548. [PMID: 31323224 DOI: 10.1016/j.ejphar.2019.172548] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 07/13/2019] [Accepted: 07/15/2019] [Indexed: 12/20/2022]
Abstract
Due to the radiosensitivity of the airway epithelium, radiation-induced sinusitis or bronchitis is not uncommon, and makes mitigation of resulting inflammatory airway diseases a principal goal of many investigations. This study examined whether Ovatodiolide (Ova) sensitizes the human metastatic nasopharyngeal cancer (NPC) cell line, NPC-BM2, to irradiation using viability, clonogenicity and Western blot assays. Concurrently, we used varying concentrations of histamine and/or Ova to determine the anti-inflammatory potential of Ovatodiolide on normal bronchus epithelial BEAS-2B cells, as well as on the subcellular distribution of Aquaporin 5 (AQP5) and expression levels of p-CREB, AQP5, p38 MAPK, NF-κB, PI3K, Akt and ERK proteins. We demonstrated that Ova in synergism with irradiation inhibited NPC-BM2 cell viability and suppressed their clonogenicity. Immunofluorescence analysis revealed low-dose (≤ 2.5 μM) Ova reversed histamine-induced suppression of AQP5 expression, and abrogated histamine-enhanced NF-κB nuclear translocation, indicating Ova modulates the p38 MAPK/NF-κB signaling pathway and elicits p-CREB/AQP5-mediated antihistamine effects. Similarly, Ova deregulates the PI3K/Akt/ERK signaling in BEAS-2B cells, suggesting its cytoprotective potential. In conclusion, this study highlights the radio-sensitizing anticancer efficacy of Ova in human metastatic NPC cells, as well as its putative cytoprotective role in normal bronchial cells, for airway surface liquid maintenance and homeostasis during or after radiotherapy.
Collapse
Affiliation(s)
- Shao-Cheng Liu
- Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei City, 114, Taiwan
| | - Chih-Ming Huang
- Department of Otolaryngology, Taitung Mackay Memorial Hospital, Taiwan
| | - Yung-Lung Chang
- Department of Biochemistry, National Defense Medical Center, Taipei City, 114, Taiwan
| | - Oluwaseun Adebayo Bamodu
- Department of Hematology and Oncology, Cancer Center, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan; Department of Medical Research & Education, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan
| | - Chi-Tai Yeh
- Department of Hematology and Oncology, Cancer Center, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan; Department of Medical Research & Education, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan
| | - Hsing-Won Wang
- Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei City, 114, Taiwan; Department of Otolaryngology-Head and Neck Surgery, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan
| | - Fei-Peng Lee
- Department of Hematology and Oncology, Cancer Center, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan; Department of Medical Research & Education, Taipei Medical University - Shuang Ho Hospital, New Taipei City, 235, Taiwan
| | - Chun-Shu Lin
- Department of Radiation Oncology, Tri-Service General Hospital, National Defense Medical Center, Taipei City, 114, Taiwan.
| |
Collapse
|
13
|
Koga Y, Tsurumaki H, Aoki-Saito H, Sato M, Yatomi M, Takehara K, Hisada T. Roles of Cyclic AMP Response Element Binding Activation in the ERK1/2 and p38 MAPK Signalling Pathway in Central Nervous System, Cardiovascular System, Osteoclast Differentiation and Mucin and Cytokine Production. Int J Mol Sci 2019; 20:ijms20061346. [PMID: 30884895 PMCID: PMC6470985 DOI: 10.3390/ijms20061346] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/08/2019] [Accepted: 03/13/2019] [Indexed: 11/26/2022] Open
Abstract
There are many downstream targets of mitogen-activated protein kinase (MAPK) signalling that are involved in neuronal development, cellular differentiation, cell migration, cancer, cardiovascular dysfunction and inflammation via their functions in promoting apoptosis and cell motility and regulating various cytokines. It has been reported that cyclic AMP response element-binding protein (CREB) is phosphorylated and activated by cyclic AMP signalling and calcium/calmodulin kinase. Recent evidence also points to CREB phosphorylation by the MAPK signalling pathway. However, the specific roles of CREB phosphorylation in MAPK signalling have not yet been reviewed in detail. Here, we describe the recent advances in the study of this MAPK-CREB signalling axis in human diseases. Overall, the crosstalk between extracellular signal-related kinase (ERK) 1/2 and p38 MAPK signalling has been shown to regulate various physiological functions, including central nervous system, cardiac fibrosis, alcoholic cardiac fibrosis, osteoclast differentiation, mucin production in the airway, vascular smooth muscle cell migration, steroidogenesis and asthmatic inflammation. In this review, we focus on ERK1/2 and/or p38 MAPK-dependent CREB activation associated with various diseases to provide insights for basic and clinical researchers.
Collapse
Affiliation(s)
- Yasuhiko Koga
- Department of Allergy and Respiratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi Maebashi, Gunma 371-8511, Japan.
| | - Hiroaki Tsurumaki
- Department of Allergy and Respiratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi Maebashi, Gunma 371-8511, Japan.
| | - Haruka Aoki-Saito
- Department of Allergy and Respiratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi Maebashi, Gunma 371-8511, Japan.
| | - Makiko Sato
- Department of Allergy and Respiratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi Maebashi, Gunma 371-8511, Japan.
| | - Masakiyo Yatomi
- Department of Allergy and Respiratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi Maebashi, Gunma 371-8511, Japan.
| | - Kazutaka Takehara
- Department of Allergy and Respiratory Medicine, Gunma University Graduate School of Medicine, 3-39-15 sho-wa machi Maebashi, Gunma 371-8511, Japan.
| | - Takeshi Hisada
- Gunma University Graduate School of Health Sciences, 3-39-22 sho-wa machi Maebashi, Gunma 371-8514, Japan.
| |
Collapse
|
14
|
Oocyte Aging: The Role of Cellular and Environmental Factors and Impact on Female Fertility. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1247:109-123. [PMID: 31802446 DOI: 10.1007/5584_2019_456] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Female aging is one of the most important factors that impacts human reproduction. With aging, there is a natural decline in female fertility. The decrease in fertility is slow and steady in women aged 30-35 years; however, this decline is accelerated after the age of 35 due to decreases in the ovarian reserve and oocyte quality. Human oocyte aging is affected by different environmental factors, such as dietary habits and lifestyle. The ovarian microenvironment contributes to oocyte aging and longevity. The immediate oocyte microenvironment consists of the surrounding cells. Crosstalk between the oocyte and microenvironment is mediated by direct contact with surrounding cells, the extracellular matrix, and signalling molecules, including hormones, growth factors, and metabolic products. In this review, we highlight the different microenvironmental factors that accelerate human oocyte aging and decrease oocyte function. The ovarian microenvironment and the stress that is induced by environmental pollutants and a poor diet, along with other factors, impact oocyte quality and function and contribute to accelerated oocyte aging and diseases of infertility.
Collapse
|
15
|
Abstract
The glycoprotein follicle-stimulating hormone (FSH) acts on gonadal target cells, hence regulating gametogenesis. The transduction of the hormone-induced signal is mediated by the FSH-specific G protein-coupled receptor (FSHR), of which the action relies on the interaction with a number of intracellular effectors. The stimulatory Gαs protein is a long-time known transducer of FSH signaling, mainly leading to intracellular cAMP increase and protein kinase A (PKA) activation, the latter acting as a master regulator of cell metabolism and sex steroid production. While in vivo data clearly demonstrate the relevance of PKA activation in mediating gametogenesis by triggering proliferative signals, some in vitro data suggest that pro-apoptotic pathways may be awakened as a "dark side" of cAMP/PKA-dependent steroidogenesis, in certain conditions. P38 mitogen-activated protein kinases (MAPK) are players of death signals in steroidogenic cells, involving downstream p53 and caspases. Although it could be hypothesized that pro-apoptotic signals, if relevant, may be required for regulating atresia of non-dominant ovarian follicles, they should be transient and counterbalanced by mitogenic signals upon FSHR interaction with opposing transducers, such as Gαi proteins and β-arrestins. These molecules modulate the steroidogenic pathway via extracellular-regulated kinases (ERK1/2), phosphatidylinositol-4,5-bisphosphate 3-kinases (PI3K)/protein kinase B (AKT), calcium signaling and other intracellular signaling effectors, resulting in a complex and dynamic signaling network characterizing sex- and stage-specific gamete maturation. Even if the FSH-mediated signaling network is not yet entirely deciphered, its full comprehension is of high physiological and clinical relevance due to the crucial role covered by the hormone in regulating human development and reproduction.
Collapse
Affiliation(s)
- Livio Casarini
- Unit of Endocrinology, Department Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Center for Genomic Research, University of Modena and Reggio Emilia, Modena, Italy
- *Correspondence: Livio Casarini
| | - Pascale Crépieux
- PRC, UMR INRA0085, CNRS 7247, Centre INRA Val de Loire, Nouzilly, France
| |
Collapse
|
16
|
Obesity-induced overexpression of miRNA-24 regulates cholesterol uptake and lipid metabolism by targeting SR-B1. Gene 2018; 668:196-203. [DOI: 10.1016/j.gene.2018.05.072] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 05/10/2018] [Accepted: 05/18/2018] [Indexed: 12/19/2022]
|
17
|
Urbanek KA, Habrowska-Górczyńska DE, Kowalska K, Stańczyk A, Domińska K, Piastowska-Ciesielska AW. Deoxynivalenol as potential modulator of human steroidogenesis. J Appl Toxicol 2018; 38:1450-1459. [DOI: 10.1002/jat.3623] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 02/28/2018] [Accepted: 02/28/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Kinga Anna Urbanek
- Laboratory of Cell Cultures and Genomic Analysis, Department of Comparative Endocrinology; Medical University of Lodz; Poland
| | | | - Karolina Kowalska
- Laboratory of Cell Cultures and Genomic Analysis, Department of Comparative Endocrinology; Medical University of Lodz; Poland
| | - Anna Stańczyk
- Laboratory of Cellular and Molecular Biology; Medical University of Lodz; Poland
| | - Kamila Domińska
- Department of Comparative Endocrinology; Medical University of Lodz; Poland
| | | |
Collapse
|
18
|
Han A, Zou L, Gan X, Li Y, Liu F, Chang X, Zhang X, Tian M, Li S, Su L, Sun Y. ROS generation and MAPKs activation contribute to the Ni-induced testosterone synthesis disturbance in rat Leydig cells. Toxicol Lett 2018; 290:36-45. [PMID: 29567110 DOI: 10.1016/j.toxlet.2018.03.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 03/07/2018] [Accepted: 03/13/2018] [Indexed: 01/23/2023]
Abstract
Nickel (Ni) can disorder testosterone synthesis in rat Leydig cells, whereas the mechanisms remain unclear. The aim of this study was to investigate the role of reactive oxygen species (ROS) and mitogen-activated protein kinases (MAPKs) in Ni-induced disturbance of testosterone synthesis in rat Leydig cells. The testosterone production and ROS levels were detected in Leydig cells. The mRNA and protein levels of testosterone synthetase, including StAR, CYP11A1, 3β-HSD, CYP17A1 and 17β-HSD, were determined. Effects of Ni on the ERK1/2, p38 and JNK MAPKs were also investigated. The results showed that Ni triggered ROS generation, consequently resulted in the decrease of testosterone synthetase expression and testosterone production in Leydig cells, which were then attenuated by ROS scavengers of N-acetylcysteine (NAC) and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), indicating that ROS are involved in the Ni-induced testosterone biosynthesis disturbance. Meanwhile Ni activated the ERK1/2, p38 and JNK MAPKs. Furthermore, Ni-inhibited testosterone synthetase expression levels and testosterone secretion were all alleviated by co-treatment with MAPK specific inhibitors (U0126 and SB203580, respectively), implying that Ni inhibited testosterone synthesis through activating ERK1/2 and p38 MAPK signal pathways in Leydig cells. In conclusion, these findings suggest that Ni causes testosterone synthesis disorder, partly, via ROS and MAPK signal pathways.
Collapse
Affiliation(s)
- Aijie Han
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Lingyue Zou
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Xiaoqin Gan
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Yu Li
- Department of Infectious Diseases, Shaanxi Provincial People's hospital, Xi'an 710068, China
| | - Fangfang Liu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Xuhong Chang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Xiaotian Zhang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Minmin Tian
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Sheng Li
- Lanzhou Municipal Center for Disease Control, Lanzhou, China
| | - Li Su
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China.
| | - Yingbiao Sun
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China.
| |
Collapse
|