101
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Hester J, Ventetuolo C, Lahm T. Sex, Gender, and Sex Hormones in Pulmonary Hypertension and Right Ventricular Failure. Compr Physiol 2019; 10:125-170. [PMID: 31853950 DOI: 10.1002/cphy.c190011] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pulmonary hypertension (PH) encompasses a syndrome of diseases that are characterized by elevated pulmonary artery pressure and pulmonary vascular remodeling and that frequently lead to right ventricular (RV) failure and death. Several types of PH exhibit sexually dimorphic features in disease penetrance, presentation, and progression. Most sexually dimorphic features in PH have been described in pulmonary arterial hypertension (PAH), a devastating and progressive pulmonary vasculopathy with a 3-year survival rate <60%. While patient registries show that women are more susceptible to development of PAH, female PAH patients display better RV function and increased survival compared to their male counterparts, a phenomenon referred to as the "estrogen paradox" or "estrogen puzzle" of PAH. Recent advances in the field have demonstrated that multiple sex hormones, receptors, and metabolites play a role in the estrogen puzzle and that the effects of hormone signaling may be time and compartment specific. While the underlying physiological mechanisms are complex, unraveling the estrogen puzzle may reveal novel therapeutic strategies to treat and reverse the effects of PAH/PH. In this article, we (i) review PH classification and pathophysiology; (ii) discuss sex/gender differences observed in patients and animal models; (iii) review sex hormone synthesis and metabolism; (iv) review in detail the scientific literature of sex hormone signaling in PAH/PH, particularly estrogen-, testosterone-, progesterone-, and dehydroepiandrosterone (DHEA)-mediated effects in the pulmonary vasculature and RV; (v) discuss hormone-independent variables contributing to sexually dimorphic disease presentation; and (vi) identify knowledge gaps and pathways forward. © 2020 American Physiological Society. Compr Physiol 10:125-170, 2020.
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Affiliation(s)
- James Hester
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care, Occupational and Sleep Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Corey Ventetuolo
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Alpert Medical School of Brown University, Providence, Rhode Island, USA.,Department of Health Services, Policy and Practice, Brown University School of Public Health, Providence, Rhode Island, USA
| | - Tim Lahm
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care, Occupational and Sleep Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana, USA
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102
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Biegon A, Shroyer KR, Franceschi D, Dhawan J, Tahmi M, Pareto D, Bonilla P, Airola K, Cohen J. Initial Studies with 11C-Vorozole PET Detect Overexpression of Intratumoral Aromatase in Breast Cancer. J Nucl Med 2019; 61:807-813. [PMID: 31757843 DOI: 10.2967/jnumed.119.231589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/30/2019] [Indexed: 12/20/2022] Open
Abstract
Aromatase inhibitors are the mainstay of hormonal therapy in estrogen receptor-positive breast cancer, although the response rate is just over 50% and in vitro studies suggest that only two thirds of postmenopausal breast tumors overexpress aromatase. The goal of the present study was to validate and optimize PET with 11C-vorozole for measuring aromatase expression in postmenopausal breast cancer in vivo. Methods: Ten newly diagnosed postmenopausal women with biopsy-confirmed breast cancer were administered 11C-vorozole intravenously, and PET emission data were collected between 40 and 90 min after injection. Tracer injection and scanning were repeated 2 h after ingestion of 2.5 mg of letrozole. Mean and maximal SUVs and ratios to nontumor tissue in the contralateral breast were determined at baseline and after letrozole. Biopsy specimens from the same tumors were stained for aromatase using immunohistochemistry and evaluated for stain intensity and the percentage of immune-positive cells. Results: Seven of the 10 women (70%) demonstrated increased mean focal uptake of tracer (SUV ratio > 1.1) coinciding with the mammographic location of the lesion, whereas the other 3 women (30%) did not (SUV ratio ≤ 1.0). All patients with an SUV ratio above 1.1 had mean SUVs above 2.4, and there was no overlap (SUV ratio ≤ 1; SUVmean, 0.8-1.8). The SUV ratio relative to breast around tumor was indistinguishable from the ratio to contralateral breast. Pretreatment with letrozole reduced tracer uptake in most subjects, although the percentage of blocking varied across and within tumors. Tumors with a high SUV in vivo also showed a high immunohistochemical staining intensity. Conclusion: PET with 11C-vorozole is a useful technique for measuring aromatase expression in individual breast lesions, enabling noninvasive quantitative measurement of baseline and posttreatment aromatase availability in primary tumors and metastatic lesions.
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Affiliation(s)
- Anat Biegon
- Department of Radiology, Stony Brook University School of Medicine, Stony Brook, New York
| | - Kenneth R Shroyer
- Department of Pathology, Stony Brook University School of Medicine, Stony Brook, New York
| | - Dinko Franceschi
- Department of Radiology, Stony Brook University School of Medicine, Stony Brook, New York
| | - Jasbeer Dhawan
- Department of Radiology, Stony Brook University School of Medicine, Stony Brook, New York
| | - Mouna Tahmi
- Department of Radiology, Stony Brook University School of Medicine, Stony Brook, New York
| | - Deborah Pareto
- Radiology Department, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Patrick Bonilla
- Department of Obstetrics and Gynecology, Nassau University Medical Center, East Meadow, New York; and
| | - Krystal Airola
- Department of Radiology, Stony Brook University School of Medicine, Stony Brook, New York
| | - Jules Cohen
- Hematology/Oncology, Stony Brook University School of Medicine, Stony Brook, New York
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103
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Yang Y, Yan H, Kong Y, Liu L, Peng Q, Wen Y, Zhou Z, Chang Q. CYP19A1 rs2470152 polymorphism increases susceptibility to depression in Chinese Han population. Neurosci Lett 2019; 713:134490. [PMID: 31518674 DOI: 10.1016/j.neulet.2019.134490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/30/2019] [Accepted: 09/09/2019] [Indexed: 11/19/2022]
Abstract
Estrogen plays a vital role in the pathogenesis of depression. The cytochrome p450 (CYP) 19A1 gene encodes aromatase, which is responsible for a key step in estrogen production. Previous studies suggested that CYP19A1 polymorphisms increase the risk of depression in the Japanese population. The current study aimed to investigate the correlation between the CYP19A1 rs2470152 polymorphism and the risk of depression in Chinese Han population. In total, 1006 Chinese Han subjects were recruited in this case-control study, including 502 patients diagnosed with depression and 504 healthy gender- and age-matched (from 18-65 years) controls. Genotyping was performed using multiplex PCR and high-throughput sequencing to assess the effects of the CYP19A1 rs2470152 (G > A) polymorphism on the risk of depression in the entire cohort and the subjects were further stratified by gender. No significant differences were observed in allele and genotype frequencies of CYP19A1 rs2470152 between total cases and controls (P > 0.05). However, the CYP19A1 rs2470152 polymorphism in the recessive model (AA vs. GG + GA) was associated with increased risk of depression (χ2 = 4.077, P = 0.043, OR = 1.347, 95% CI = 1.008-1.798). After subjects stratification by gender, neither genotypes nor genetic models showed significant differences between cases and controls (all P > 0.05). The results indicated that the CYP19A1 rs2470152 (G > A) polymorphism in the recessive model (AA vs. GG + GA) was correlated with increased risk of depression in Chinese Han population.
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Affiliation(s)
- Yanping Yang
- Department of Gynecology and Obstetrics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Huacheng Yan
- Department of Disease Surveillance, Center for Disease Control and Prevention of Southern Theatre Command, Guangzhou, 510507, China
| | - Yanying Kong
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Lebin Liu
- Department of Disease Surveillance, Center for Disease Control and Prevention of Southern Theatre Command, Guangzhou, 510507, China
| | - Qiuju Peng
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Yuguan Wen
- Department of Pharmacy, Guangzhou Brain Hospital, Guangzhou, 510510, China
| | - Zhijian Zhou
- Department of Disease Surveillance, Center for Disease Control and Prevention of Southern Theatre Command, Guangzhou, 510507, China
| | - Qingxian Chang
- Department of Gynecology and Obstetrics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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104
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The estrogen effect; clinical and histopathological evidence of dichotomous influences in dogs with spontaneous mammary carcinomas. PLoS One 2019; 14:e0224504. [PMID: 31652293 PMCID: PMC6814212 DOI: 10.1371/journal.pone.0224504] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/10/2019] [Indexed: 11/21/2022] Open
Abstract
The purpose of this study was to investigate the associations and explore the relationships between hormonal factors (serum estrogen, estrogen receptors and ovariohysterectomy) and other clinical/histological prognostic factors and their impact on outcome in dogs with mammary carcinomas. Data from two separate prospective studies on dogs with spontaneous mammary carcinomas were used for this research. All dogs underwent standardized diagnostic testing, staging, surgery and follow-up examinations. Serum estrogen was analyzed by competitive enzyme immunoassay or radioimmunoassay, and tumor estrogen receptor (ER) expression was analyzed by immunohistochemistry. A total of 159 dogs were included; 130 were spayed and 29 remained. High serum estrogen was associated with an overall longer time to metastasis (p = 0.021). When stratifying based on spay group, the effect was only significant in spayed dogs, (p = 0.019). Positive tumor ER expression was also associated with a longer time to metastasis (p = 0.025), but similar to above, only in dogs that were spayed (p = 0.049). Further subgroup analysis revealed that high serum estrogen was significantly associated with improved survival in dogs with ER positive tumors, but only in spayed dogs (p = 0.0052). Interestingly, the effect of spaying was the opposite in dogs with ER negative tumors; here, intact dogs with high serum estrogen but ER negative tumors had a significantly longer time to metastasis (p = 0.036). Low serum estrogen was associated with increased risk for the development of non-mammary tumors in the post-operative period (p = 0.012). These results highlight the dual effect of estrogen in cancer: Estrogen acts as a pro-carcinogen in ER positive mammary tumors, but a may have a protective effect in ER negative tumors, potentially via non-receptor mechanisms. The latter is supported by the decreased risk for non-mammary tumors in dogs with high serum estrogen, and explains the increased incidence of certain non-mammary tumors in in dogs spayed at an early age.
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105
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Mohanty SS, Mohanty PK. Obesity as potential breast cancer risk factor for postmenopausal women. Genes Dis 2019; 8:117-123. [PMID: 33997158 PMCID: PMC8099684 DOI: 10.1016/j.gendis.2019.09.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/21/2019] [Accepted: 09/04/2019] [Indexed: 12/15/2022] Open
Abstract
Breast cancer is the second highest prevalent cancer globally after lung cancer with 2.09 million cases during 2018. Adults about 1.9 billion were overweight and over 650 million out of these were obese during 2016. There is a significant relationship between breast cancer risk and obesity. Premature menopause and premenopausal obesity diminish the risk whereas postmenopausal obesity amplifies the risk, because adipose tissue acts as the major reservoir for estrogen biosynthesis after menopause. Lofty estrogen levels in serum along with enhanced peripheral site production of estrogen have been viewed as major reasons of developing breast cancer in overweight postmenopausal women. This review explains body fat as a peripheral site for estrogen biosynthesis, estrogen exposure affecting body fat distribution, and the mechanism of estrogen production from body fats.
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Affiliation(s)
- Swati Sucharita Mohanty
- Cytogenetics Laboratory, P.G. Department of Zoology, Utkal University, Bhubaneswar, 751004, Odisha, India
| | - Prafulla Kumar Mohanty
- Cytogenetics Laboratory, P.G. Department of Zoology, Utkal University, Bhubaneswar, 751004, Odisha, India
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106
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Sex differences in breathing. Comp Biochem Physiol A Mol Integr Physiol 2019; 238:110543. [PMID: 31445081 DOI: 10.1016/j.cbpa.2019.110543] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 08/08/2019] [Accepted: 08/09/2019] [Indexed: 01/15/2023]
Abstract
Breathing is a vital behavior that ensures both the adequate supply of oxygen and the elimination of CO2, and it is influenced by many factors. Despite that most of the studies in respiratory physiology rely heavily on male subjects, there is much evidence to suggest that sex is an important factor in the respiratory control system, including the susceptibility for some diseases. These different respiratory responses in males and females may be related to the actions of sex hormones, especially in adulthood. These hormones affect neuromodulatory systems that influence the central medullary rhythm/pontine pattern generator and integrator, sensory inputs to the integrator and motor output to the respiratory muscles. In this article, we will first review the sex dependence on the prevalence of some respiratory-related diseases. Then, we will discuss the role of sex and gonadal hormones in respiratory control under resting conditions and during respiratory challenges, such as hypoxia and hypercapnia, and whether hormonal fluctuations during the estrous/menstrual cycle affect breathing control. We will then discuss the role of the locus coeruleus, a sexually dimorphic CO2/pH-chemosensitive nucleus, on breathing regulation in males and females. Next, we will highlight the studies that exist regarding sex differences in respiratory control during development. Finally, the few existing studies regarding the influence of sex on breathing control in non-mammalian vertebrates will be discussed.
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107
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Essential oils disrupt steroidogenesis in a feto-placental co-culture model. Reprod Toxicol 2019; 90:33-43. [PMID: 31425786 DOI: 10.1016/j.reprotox.2019.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/26/2019] [Accepted: 08/13/2019] [Indexed: 01/24/2023]
Abstract
We determined whether 5 common essential oils (basil, fennel seed, orange, black pepper and sage) interfered with feto-placental steroidogenesis in a co-culture model composed of fetal-like adrenocortical (H295R) and placental trophoblast-like (BeWo) cells. After a 24 h exposure, only basil and fennel seed oil significantly increased hormone concentrations of estradiol, estrone, dehydroepiandrosterone (DHEA), androstenedione, progesterone, and estriol. Basil and fennel seed oil were shown to significantly alter the expression of steroidogenic enzymes involved in cholesterol transport and steroid hormone biosynthesis, including StAR, CYP11A1, 3β-HSD1/2, SULT2A1, and HSD17β1, -4, and -5. Also, basil and fennel seed oil stimulated placental-specific promoter I.1 and pII-derived CYP19 mRNA in BeWo and H295R cells, respectively, as well as, increased CYP19 enzyme activity. Our results indicate that further study is necessary to determine the potential risks of using basil and fennel seed oils during pregnancy considering their potential to disrupt steroidogenic enzyme activity and expression in vitro.
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108
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Banjare L, Verma SK, Jain AK, Thareja S. Structure Guided Molecular Docking Assisted Alignment Dependent 3DQSAR Study on Steroidal Aromatase Inhibitors (SAIs) as Anti-breast Cancer Agents. LETT DRUG DES DISCOV 2019. [DOI: 10.2174/1570180815666181010101024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background:
In spite of the availability of various treatment approaches including
surgery, radiotherapy, and hormonal therapy, the steroidal aromatase inhibitors (SAIs) play a
significant role as chemotherapeutic agents for the treatment of estrogen-dependent breast cancer
with the benefit of reduced risk of recurrence. However, due to greater toxicity and side effects
associated with currently available anti-breast cancer agents, there is emergent requirement to
develop target-specific AIs with safer anti-breast cancer profile.
Methods:
It is challenging task to design target-specific and less toxic SAIs, though the molecular
modeling tools viz. molecular docking simulations and QSAR have been continuing for more than
two decades for the fast and efficient designing of novel, selective, potent and safe molecules
against various biological targets to fight the number of dreaded diseases/disorders. In order to
design novel and selective SAIs, structure guided molecular docking assisted alignment dependent
3D-QSAR studies was performed on a data set comprises of 22 molecules bearing steroidal
scaffold with wide range of aromatase inhibitory activity.
Results:
3D-QSAR model developed using molecular weighted (MW) extent alignment approach
showed good statistical quality and predictive ability when compared to model developed using
moments of inertia (MI) alignment approach.
Conclusion:
The explored binding interactions and generated pharmacophoric features (steric and
electrostatic) of steroidal molecules could be exploited for further design, direct synthesis and
development of new potential safer SAIs, that can be effective to reduce the mortality and
morbidity associated with breast cancer.
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Affiliation(s)
- Laxmi Banjare
- School of Pharmaceutical Sciences, Guru Ghasidas Central University, Bilaspur- 495 009, C.G., India
| | - Sant Kumar Verma
- School of Pharmaceutical Sciences, Guru Ghasidas Central University, Bilaspur- 495 009, C.G., India
| | - Akhlesh Kumar Jain
- School of Pharmaceutical Sciences, Guru Ghasidas Central University, Bilaspur- 495 009, C.G., India
| | - Suresh Thareja
- School of Pharmaceutical Sciences, Guru Ghasidas Central University, Bilaspur- 495 009, C.G., India
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109
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Yan T, Cai Y, He J, Zhang Q, Wang X, Zhang S, He L, He Z. Characterization and expression profiles of cyp19a1a in the schizothoracine fish Schizothorax prenanti. Tissue Cell 2019; 58:70-75. [DOI: 10.1016/j.tice.2019.04.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/11/2019] [Accepted: 04/19/2019] [Indexed: 12/15/2022]
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110
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Jaimes L, Vinet R, Knox M, Morales B, Benites J, Laurido C, Martínez JL. A Review of the Actions of Endogenous and Exogenous Vasoactive Substances during the Estrous Cycle and Pregnancy in Rats. Animals (Basel) 2019; 9:E288. [PMID: 31146394 PMCID: PMC6617363 DOI: 10.3390/ani9060288] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 04/04/2019] [Accepted: 04/22/2019] [Indexed: 12/12/2022] Open
Abstract
Vascular endothelium plays a key role in regulating cardiovascular homeostasis by controlling the vascular tone. Variations in sex hormones during the reproductive cycle of females affect the homeostasis of the cardiovascular system. Also, the evidence shows that estrogens show a cardioprotective effect. On this basis, this study describes some vascular responses induced by vasoactive substances during the estrous cycle in rats. We obtained the information available on this topic from the online databases that included scientific articles published in the Web of Science, PubMed, and Scielo. Many investigations have evaluated the vasoactive response of substances such as acetylcholine and norepinephrine during the estrous cycle. In this review, we specifically described the vascular response to vasoactive substances in rats during the estrous cycle, pregnancy, and in ovariectomized rats. In addition, we discussed the existence of different signaling pathways that modulate vascular function. The knowledge of these effects is relevant for the optimization and development of new treatments for some vascular pathologies.
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Affiliation(s)
- Luisauris Jaimes
- Faculty of Chemistry and Biology, University de Santiago de Chile, Estación Central 9160020, Chile; (L.J.); (B.M.)
| | - Raúl Vinet
- CMBi, Faculty of Pharmacy, Universidad de Valparaíso, Valparaíso 2360102, Chile; (R.V.); (M.K.)
- Regional Centre for Studies in Food and Health (CREAS, Grant R17A10001), Valparaíso 2362696, Chile
| | - Marcela Knox
- CMBi, Faculty of Pharmacy, Universidad de Valparaíso, Valparaíso 2360102, Chile; (R.V.); (M.K.)
| | - Bernardo Morales
- Faculty of Chemistry and Biology, University de Santiago de Chile, Estación Central 9160020, Chile; (L.J.); (B.M.)
| | - Julio Benites
- Faculty of Health Science, Universidad Arturo Prat, Iquique 1100000, Chile;
| | - Claudio Laurido
- Faculty of Chemistry and Biology, University de Santiago de Chile, Estación Central 9160020, Chile; (L.J.); (B.M.)
| | - José L. Martínez
- Vice Chancellor of Investigation, Development and Innovation, Universidad de Santiago de Chile, Estación Central 9160020, Chile
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111
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Rendic SP, Peter Guengerich F. Human cytochrome P450 enzymes 5-51 as targets of drugs and natural and environmental compounds: mechanisms, induction, and inhibition - toxic effects and benefits. Drug Metab Rev 2019; 50:256-342. [PMID: 30717606 DOI: 10.1080/03602532.2018.1483401] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cytochrome P450 (P450, CYP) enzymes have long been of interest due to their roles in the metabolism of drugs, pesticides, pro-carcinogens, and other xenobiotic chemicals. They have also been of interest due to their very critical roles in the biosynthesis and metabolism of steroids, vitamins, and certain eicosanoids. This review covers the 22 (of the total of 57) human P450s in Families 5-51 and their substrate selectivity. Furthermore, included is information and references regarding inducibility, inhibition, and (in some cases) stimulation by chemicals. We update and discuss important aspects of each of these 22 P450s and questions that remain open.
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Affiliation(s)
| | - F Peter Guengerich
- b Department of Biochemistry , Vanderbilt University School of Medicine , Nashville , TN , USA
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112
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Hallmann A, Konieczna L, Swiezak J, Milczarek R, Smolarz K. Aromatisation of steroids in the bivalve Mytilus trossulus. PeerJ 2019; 7:e6953. [PMID: 31198629 PMCID: PMC6535040 DOI: 10.7717/peerj.6953] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 04/12/2019] [Indexed: 11/20/2022] Open
Abstract
In this study, we demonstrated the presence of the enzymatic complex able to perform aromatization (estrogen synthesis) in both, the microsomal and mitochondrial fractions of gills and gonads from Mytilus trossulus. Based on in vitro experiments, we highlighted the importance of temperature as the limiting factor of aromatisation efficiency (AE) in mussels. After testing range of temperatures (4–23 °C), the highest AE was found during incubation at 8 °C and pH 7.6 (41.66 pmol/h/mg protein in gills and 58.37 pmol/h/mg protein in gonads). The results were confirmed during field studies where the most efficient aromatisation occurred in bivalves collected in spring while the least effective in those collected in winter. During in vitro studies, AE turned out to be more intensive in female gonads than in male gonads. The process was also more intensive in mitochondrial fraction than in microsomal one (62.97 pmol/h/mg protein in male gills and 73.94 pmol/h/mg protein in female gonads). Enzymatic complex (aromatase-like enzyme) catalysing aromatisation in mussels was found to be insensitive to inhibitory effect of selective inhibitors of mammalian aromatase such as letrozole and anastrazole, suggesting its different structure from vertebrate aromatase. Further in vivo studies using 13C-labeled steroids at 8 °C temperature window confirmed that bivalves are able to uptake testosterone and androstenedione from the ambient environment and metabolise them to estrone and 17β-estradiol thus confirming endogenous estrogen’ synthesis.
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Affiliation(s)
- Anna Hallmann
- Department of Pharmaceutical Biochemistry, Medical University of Gdańsk, Gdańsk, Poland
| | - Lucyna Konieczna
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Gdańsk, Poland
| | - Justyna Swiezak
- Department of Marine Ecosystem Functioning, University of Gdańsk, Gdynia, Poland
| | - Ryszard Milczarek
- Department of Pharmaceutical Biochemistry, Medical University of Gdańsk, Gdańsk, Poland
| | - Katarzyna Smolarz
- Department of Marine Ecosystem Functioning, University of Gdańsk, Gdynia, Poland
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113
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Ritacco I, Spinello A, Ippoliti E, Magistrato A. Post-Translational Regulation of CYP450s Metabolism As Revealed by All-Atoms Simulations of the Aromatase Enzyme. J Chem Inf Model 2019; 59:2930-2940. [PMID: 31033287 DOI: 10.1021/acs.jcim.9b00157] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Phosphorylation by kinases enzymes is a widespread regulatory mechanism able of rapidly altering the function of target proteins. Among these are cytochrome P450s (CYP450), a superfamily of enzymes performing the oxidation of endogenous and exogenous substrates thanks to the electron supply of a redox partner. In spite of its pivotal role, the molecular mechanism by which phosphorylation modulates CYP450s metabolism remains elusive. Here by performing microsecond-long all-atom molecular dynamics simulations, we disclose how phosphorylation regulates estrogen biosynthesis, catalyzed by the Human Aromatase (HA) enzyme. Namely, we unprecedentedly propose that HA phosphorylation at Y361 markedly stabilizes its adduct with the flavin mononucleotide domain of CYP450s reductase (CPR), the redox partner of microsomal CYP450s, and a variety of other proteins. With CPR present at physiological conditions in a limiting ratio with respect to its multiple oxidative partners, the enhanced stability of the CPR/HA adduct may favor HA in the competition with the other proteins requiring CPR's electron supply, ultimately facilitating the electron transfer and estrogen biosynthesis. As a result, our work elucidates at atomic-level the post-translational regulation of CYP450s catalysis. Given the potential for rational clinical management of diseases associated with steroid metabolism disorders, unraveling this mechanism is of utmost importance, and raises the intriguing perspective of exploiting this knowledge to devise novel therapies.
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Affiliation(s)
- Ida Ritacco
- CNR-IOM-Democritos c/o International School for Advanced Studies (SISSA) , via Bonomea 265 , 34136 Trieste , Italy
| | - Angelo Spinello
- CNR-IOM-Democritos c/o International School for Advanced Studies (SISSA) , via Bonomea 265 , 34136 Trieste , Italy
| | - Emiliano Ippoliti
- IAS-5/INM-9 Computational Biomedicine Institute and JARA-HPC, Forschungszentrum Jülich , Wilhelm-Johnen-Straße , 52425 Jülich , Germany
| | - Alessandra Magistrato
- CNR-IOM-Democritos c/o International School for Advanced Studies (SISSA) , via Bonomea 265 , 34136 Trieste , Italy
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114
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Gould CJ, Saldanha CJ, Connaughton VP. Acute exposure to 4-OH-A, not PCB 1254, alters brain aromatase activity but does not adversely affect growth in zebrafish. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2019; 68:133-140. [PMID: 30889543 PMCID: PMC6516860 DOI: 10.1016/j.etap.2019.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Acute developmental exposure to pharmaceuticals or environmental contaminants can have deleterious, long lasting effects. Many of these compounds are endocrine disruptors (EDCs) that target estrogen signaling, with effects on reproductive and non-reproductive tissues. We recently reported that zebrafish larvae transiently exposed to the pharmaceutical EDC 4-OH-A display visual deficits as adults. Here, we examine whether these long-term effects are due to compound-induced morphological and/or cellular changes. Zebrafish aged 24 h, 48 h, 72 h, or 7 days post-fertilization (larvae) or 3-4mos (adults) were exposed to either 4-OH-A or PCB1254 for 24 h. After that time, notochord length, eye diameter, inter-eye distance, and heart rate were measured from larvae; and aromatase (estrogen synthase) activity was measured in homogenates of adult brain tissue. In general, indices of larval growth and development were not altered by 24 h exposure to either compound. 4-OH-A potently inhibited aromatase activity, while PCB1254 did not, with inhibition continuing even after removal from treatment. These results support differential function of EDCs and indicate that developmental exposure to 4-OH-A causes sustained inhibition of aromatase, which could be associated with altered adult behaviors.
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Affiliation(s)
- Cassie J Gould
- Department of Biology, American University, Washington, DC, United States; Behavior, Cognition & Neuroscience Program, American University, Washington, DC, United States; Center for Behavioral Neuroscience, American University, Washington, DC, United States.
| | - Colin J Saldanha
- Department of Biology, American University, Washington, DC, United States; Behavior, Cognition & Neuroscience Program, American University, Washington, DC, United States; Center for Behavioral Neuroscience, American University, Washington, DC, United States
| | - Victoria P Connaughton
- Department of Biology, American University, Washington, DC, United States; Behavior, Cognition & Neuroscience Program, American University, Washington, DC, United States; Center for Behavioral Neuroscience, American University, Washington, DC, United States
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Chronic Antipsychotic Treatment Modulates Aromatase (CYP19A1) Expression in the Male Rat Brain. J Mol Neurosci 2019; 68:311-317. [PMID: 30968339 PMCID: PMC6511348 DOI: 10.1007/s12031-019-01307-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 03/20/2019] [Indexed: 01/20/2023]
Abstract
Antipsychotic drugs, known as the antagonists of dopaminergic receptors, may also affect a large spectrum of other molecular signaling pathways in the brain. Despite the numerous ongoing studies on neurosteroid action and regulation, there are no reports regarding the influence of extended treatment with typical and atypical neuroleptics on brain aromatase (CYP19A1) expression. In the present study, we assessed for the first time aromatase mRNA and protein levels in the brain of rats chronically (28 days) treated with olanzapine, clozapine, and haloperidol using quantitative real-time PCR, end-point RT-PCR, and Western blotting. Both clozapine and haloperidol, but not olanzapine treatment, led to an increase of aromatase mRNA expression in the rat brain. On the other hand, aromatase protein level remained unchanged after drug administration. These results cast a new light on the pharmacology of examined antipsychotics and contribute to a better understanding of the mechanisms responsible for their action. The present report also underlines the complex nature of potential interactions between neuroleptic pharmacological effects and physiology of brain neurosteroid pathways.
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116
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Seven Hormonal Biomarkers for Diagnosing Endometriosis: Meta-Analysis and Adjusted Indirect Comparison of Diagnostic Test Accuracy. J Minim Invasive Gynecol 2019; 26:1026-1035.e4. [PMID: 30965114 DOI: 10.1016/j.jmig.2019.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/27/2019] [Accepted: 04/01/2019] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To compare the diagnostic accuracy of different hormonal biomarkers and to find the most effective hormonal biomarker for the diagnosis of endometriosis. DATA SOURCES We conducted a systematic search using PubMed, EMBASE, Cochrane Library, and China Biomedical Literature to identify relevant studies from the first day of databases to August 2018. METHODS OF STUDY SELECTION Two independent reviewers screened for study eligibility and extracted data. Random controlled trials, cross-sectional studies, case-control studies, and cohort studies evaluating the diagnostic accuracy of hormonal markers for endometriosis were included. TABULATION, INTEGRATION, AND RESULTS We included 17 studies that involved 1279 participants and evaluated 7 hormonal biomarkers. The pooled sensitivity and specificity in endometriosis were .79 (.71, .86) and .89 (.82, .94) for aromatase, .30 (.18, .46) and .80 (.65, .90) for human chorionic gonadotropin/luteinizing hormone receptor, .75 (.66, .83) and .47 (.34, .60) for estrogen receptor (ER)-α, .65 (.56, .74) and .68 (.55, .80) for ER-β, .45 (.38-.52) and .92 (.85-.97) for serum prolactin, .69 (.51, .83) and .30 (.16, .49) for estrogen sulfotransferase, and .73 (.60-.84) and .48 (.33-.63) for 17β-hydroxysteroid dehydrogenase type 2 (17βHSD2). Compared with human chorionic gonadotropin/luteinizing hormone receptor, ER-α, ER-β, estrogen sulfotransferase, and 17βHSD2, aromatase had a higher sensitivity, specificity, positive likelihood ratio, and diagnostic odds ratio. The specificities of aromatase and serum prolactin were comparable, but the sensitivity, positive likelihood ratio, and positive likelihood ratio of serum prolactin were much lower than that of aromatase. CONCLUSION Aromatase may be an excellent diagnostic test for endometriosis. However, because of the moderate quality of the included studies and the limited sample size, this result requires more research to validate. (PROSPERO registration number: PROSPERO 2018 CRD42018105126.).
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117
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Bernasochi GB, Bell JR, Simpson ER, Delbridge LM, Boon WC. Impact of Estrogens on the Regulation of White, Beige, and Brown Adipose Tissue Depots. Compr Physiol 2019; 9:457-475. [DOI: 10.1002/cphy.c180009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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118
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Liang HW, Meng Y, Cao LH, Li X, Zou GW. Expression and characterization of the cyp19a gene and its responses to estradiol/letrozole exposure in Chinese soft-shelled turtle (Pelodiscus sinensis). Mol Reprod Dev 2019; 86:480-490. [PMID: 30779247 DOI: 10.1002/mrd.23126] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 01/02/2019] [Accepted: 01/09/2019] [Indexed: 01/21/2023]
Abstract
Cytochrome P450 aromatase (CYP19) catalyzes the conversion of androgens to estrogens and is critical in sex differentiation. CYP19 exists as the ovarian type and brain type. Herein, we cloned the full-length ovarian cyp19a gene from the Chinese soft-shelled turtle, Pelodiscus sinensis (pscyp19a). We determined the distribution of pscyp19a in adult tissue and evaluated its expression during embryonic development, following treatment with 17β-estradiol (E2) or letrozole (LE). The pscyp19a complementary DNA is 2,285 bp in length and comprises a 1,512 bp open reading frame that encodes a protein of 503 AA. The nucleotide sequence and amino acid of pscyp19a shared significant identity with other vertebrate sequences. Expression of pscyp19a was high in the ovary (p < 0.01), and exhibited modest expression in the female brain and intestine. Expression of pscyp19a displayed significant differences between sexes during early embryo development stages; expression increased gradually during embryonic development in females, but the opposite trend was observed in males. Female embryos treated with different concentrations of E2 and LE displayed altered pscyp19a expression compared with untreated individuals, and E2 clearly induced pscyp19a expression. These results indicate that pscyp19a gene plays important roles in early developmental stages in Chinese soft-shelled turtle, and may assist future studies on sex differentiation and sex control in this and similar species.
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Affiliation(s)
- Hong W Liang
- Key Laboratory of Aquatic Genomics, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Hubei, China.,Devision of Fish Genetics and Breeding, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hubei, China
| | - Yan Meng
- Devision of Fish Genetics and Breeding, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hubei, China
| | - Li H Cao
- Devision of Fish Genetics and Breeding, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hubei, China
| | - Xiang Li
- Anhui Xijia Agricultural Development Co. Ltd, Anhui, China
| | - Gui W Zou
- Devision of Fish Genetics and Breeding, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hubei, China
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119
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Fuentes N, Silveyra P. Estrogen receptor signaling mechanisms. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2019; 116:135-170. [PMID: 31036290 DOI: 10.1016/bs.apcsb.2019.01.001] [Citation(s) in RCA: 466] [Impact Index Per Article: 93.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The primary female sex hormones, estrogens, are responsible for the control of functions of the female reproductive system, as well as the development of secondary sexual characteristics that appear during puberty and sexual maturity. Estrogens exert their actions by binding to specific receptors, the estrogen receptors (ERs), which in turn activate transcriptional processes and/or signaling events that result in the control of gene expression. These actions can be mediated by direct binding of estrogen receptor complexes to specific sequences in gene promoters (genomic effects), or by mechanisms that do not involve direct binding to DNA (non-genomic effects). Whether acting via direct nuclear effects, indirect non-nuclear actions, or a combination of both, the effects of estrogens on gene expression are controlled by highly regulated complex mechanisms. In this chapter, we summarize the knowledge gained in the past 60years since the discovery of the estrogen receptors on the mechanisms governing estrogen-mediated gene expression. We provide an overview of estrogen biosynthesis, and we describe the main mechanisms by which the female sex hormone controls gene transcription in different tissues and cell types. Specifically, we address the molecular events governing regulation of gene expression via the nuclear estrogen receptors (ERα, and ERβ) and the membrane estrogen receptor (GPER1). We also describe mechanisms of cross-talk between signaling cascades activated by both nuclear and membrane estrogen receptors. Finally, we discuss natural compounds that are able to target specific estrogen receptors and their implications for human health and medical therapeutics.
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Affiliation(s)
- Nathalie Fuentes
- Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Patricia Silveyra
- Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, United States; The University of North Carolina at Chapel Hill, School of Nursing, Chapel Hill, NC, United States.
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120
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Patel S, Sangeeta S. Pesticides as the drivers of neuropsychotic diseases, cancers, and teratogenicity among agro-workers as well as general public. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:91-100. [PMID: 30411285 DOI: 10.1007/s11356-018-3642-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 10/30/2018] [Indexed: 06/08/2023]
Abstract
The need to maximize agricultural productivity has made pesticides an indispensable part of current times. Farmers are unaware of the lurking consequences of the pesticide exposure, which endanger their health. It also puts the unsuspecting consumers in peril. The pesticides (from organophosphates, organochlorine, and carbamate class) disrupt the immune and hormonal signaling, causing recurrent inflammation, which leads to a wide array pathologies, including teratogenicity. Numerous farmers have fallen victim to neural disorders-driven suicides and lungs, prostate/breast cancer-caused untimely deaths. Green revolution which significantly escalated agricultural productivity is backfiring now. It is high time that environmental and agricultural authorities act to restrain the excessive usage of the detrimental chemicals and educate farmers regarding the crisis. This review discusses the biological mechanisms of pesticide-driven pathogenesis (such as the activation or inhibition of caspase, serine protease, acetylcholinesterase) and presents the pesticide-exposure-caused health deterioration in USA, India, and Africa. This holistic and critical review should be an eye-opener for general public, and a guide for researchers.
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Affiliation(s)
- Seema Patel
- Bioinformatics and Medical Informatics Research Center, San Diego State University, 5500 Campanile Dr, San Diego, CA, 92182, USA.
| | - Sushree Sangeeta
- Department of Ecology and Environmental Sciences, Pondicherry University, Puducherry, 605014, India.
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121
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Favretto D, Snenghi R, Pertile R, El Mazloum R, Tucci M, Visentin S, Vogliardi S. Hair analysis to discriminate voluntary doping vs inadvertent ingestion of the aromatase inhibitor letrozole. Drug Test Anal 2018; 11:762-771. [DOI: 10.1002/dta.2555] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/26/2018] [Accepted: 11/27/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Donata Favretto
- University Hospital of Padova Padova Italy
- Department of Cardiac Thoracic and Vascular Sciences and Public HealthUniversity of Padova Padova Italy
| | | | | | - Rafi El Mazloum
- Department of Cardiac Thoracic and Vascular Sciences and Public HealthUniversity of Padova Padova Italy
| | - Marianna Tucci
- Department of Cardiac Thoracic and Vascular Sciences and Public HealthUniversity of Padova Padova Italy
| | - Sindi Visentin
- University Hospital of Padova Padova Italy
- Department of Cardiac Thoracic and Vascular Sciences and Public HealthUniversity of Padova Padova Italy
| | - Susanna Vogliardi
- Department of Cardiac Thoracic and Vascular Sciences and Public HealthUniversity of Padova Padova Italy
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122
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Chaudhari S, Cushen SC, Osikoya O, Jaini PA, Posey R, Mathis KW, Goulopoulou S. Mechanisms of Sex Disparities in Cardiovascular Function and Remodeling. Compr Physiol 2018; 9:375-411. [PMID: 30549017 DOI: 10.1002/cphy.c180003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Epidemiological studies demonstrate disparities between men and women in cardiovascular disease prevalence, clinical symptoms, treatments, and outcomes. Enrollment of women in clinical trials is lower than men, and experimental studies investigating molecular mechanisms and efficacy of certain therapeutics in cardiovascular disease have been primarily conducted in male animals. These practices bias data interpretation and limit the implication of research findings in female clinical populations. This review will focus on the biological origins of sex differences in cardiovascular physiology, health, and disease, with an emphasis on the sex hormones, estrogen and testosterone. First, we will briefly discuss epidemiological evidence of sex disparities in cardiovascular disease prevalence and clinical manifestation. Second, we will describe studies suggesting sexual dimorphism in normal cardiovascular function from fetal life to older age. Third, we will summarize and critically discuss the current literature regarding the molecular mechanisms underlying the effects of estrogens and androgens on cardiac and vascular physiology and the contribution of these hormones to sex differences in cardiovascular disease. Fourth, we will present cardiovascular disease risk factors that are positively associated with the female sex, and thus, contributing to increased cardiovascular risk in women. We conclude that inclusion of both men and women in the investigation of the role of estrogens and androgens in cardiovascular physiology will advance our understanding of the mechanisms underlying sex differences in cardiovascular disease. In addition, investigating the role of sex-specific factors in the development of cardiovascular disease will reduce sex and gender disparities in the treatment and diagnosis of cardiovascular disease. © 2019 American Physiological Society. Compr Physiol 9:375-411, 2019.
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Affiliation(s)
- Sarika Chaudhari
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Spencer C Cushen
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Oluwatobiloba Osikoya
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Paresh A Jaini
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Rachel Posey
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Keisa W Mathis
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Styliani Goulopoulou
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas, USA
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123
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Pal S, Verma R, Kumar J, Haldar C. Photoperiod modulates oestrogen status, insulin interposed glucose uptake and connexin-43 in testes of golden hamster, Mesocricetus auratus. BIOL RHYTHM RES 2018. [DOI: 10.1080/09291016.2018.1548874] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sriparna Pal
- Department of Zoology, Banaras Hindu University, Varanasi, India
| | - Rakesh Verma
- Department of Zoology, Banaras Hindu University, Varanasi, India
| | - Jitendra Kumar
- Department of Zoology, Banaras Hindu University, Varanasi, India
| | - Chandana Haldar
- Department of Zoology, Banaras Hindu University, Varanasi, India
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124
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Takahashi K, Hosoya T, Onoe K, Takashima T, Tanaka M, Ishii A, Nakatomi Y, Tazawa S, Takahashi K, Doi H, Wada Y, Watanabe Y. Association between aromatase in human brains and personality traits. Sci Rep 2018; 8:16841. [PMID: 30442903 PMCID: PMC6237866 DOI: 10.1038/s41598-018-35065-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 10/22/2018] [Indexed: 11/09/2022] Open
Abstract
Aromatase, an enzyme that converts androgens to estrogens, has been reported to be involved in several brain functions, including synaptic plasticity, neurogenesis, neuroprotection, and regulation of sexual and emotional behaviours in rodents, pathophysiology of Alzheimer's disease and autism spectrum disorders in humans. Aromatase has been reported to be involved in aggressive behaviours in genetically modified mice and in personality traits by genotyping studies on humans. However, no study has investigated the relationship between aromatase in living brains and personality traits including aggression. We performed a positron emission tomography (PET) study in 21 healthy subjects using 11C-cetrozole, which has high selectivity and affinity for aromatase. Before performing PET scans, subjects answered the Buss-Perry Aggression Questionnaire and Temperament and Character Inventory to measure their aggression and personality traits, respectively. A strong accumulation of 11C-cetrozole was detected in the thalamus, hypothalamus, amygdala, and medulla. Females showed associations between aromatase levels in subcortical regions, such as the amygdala and supraoptic nucleus of the hypothalamus, and personality traits such as aggression, novelty seeking, and self-transcendence. In contrast, males exhibited associations between aromatase levels in the cortices and harm avoidance, persistence, and self-transcendence. The association of aromatase levels in the thalamus with cooperativeness was common to both sexes. The present study suggests that there might exist associations between aromatase in the brain and personality traits. Some of these associations may differ between sexes, while others are likely common to both.
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Affiliation(s)
- Kayo Takahashi
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan
| | - Takamitsu Hosoya
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Kayo Onoe
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Tadayuki Takashima
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Masaaki Tanaka
- Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan
| | - Akira Ishii
- Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan
| | - Yasuhito Nakatomi
- Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan.,Department of Metabolism, Endocrinology and Molecular Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan
| | - Shusaku Tazawa
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Kazuhiro Takahashi
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Hisashi Doi
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Yasuhiro Wada
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.,Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan
| | - Yasuyoshi Watanabe
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan. .,RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan. .,Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-cho, Abeno-ku, Osaka, 545-8585, Japan.
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125
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Cranford TL, Velázquez KT, Enos RT, Sougiannis AT, Bader JE, Carson MS, Bellone RR, Chatzistamou I, Nagarkatti M, Murphy EA. Effects of high fat diet-induced obesity on mammary tumorigenesis in the PyMT/MMTV murine model. Cancer Biol Ther 2018; 20:487-496. [PMID: 30388923 DOI: 10.1080/15384047.2018.1537574] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Clinical studies provide strong evidence that obesity and associated adipose tissue (AT) inflammation are risk factors for breast cancer (BrCA); however, mechanistic knowledge of the interaction of obesity, BrCA, and menopausal status has proven to be not only lacking, but contradictory. Obesity-induced inflammation and elevated biosynthesis of estrogens, through aromatase-mediated metabolism of precursors, have been linked with hormone receptor positive (HP) postmenopausal BrCA but not previously associated with premenopausal BrCA risk. Thus, further delineation of the interaction of obesity, inflammation, and aromatase is required for the development of therapeutic treatment options. The purpose of this study was to examine the effect of high fat diet (HFD)-induced inflammation on tumorigenesis in a model of pre and postmenopausal HP BrCA. Female PyMT/MMTV ovary intact and ovariectomized mice were fed low and HFD diets to examine the role of obesity-induced inflammation and hormone production in the development of HP BrCA. Tumor statistics for number, volume, weight, histopathology scoring and gene expression of macrophage and inflammatory mediators were measured in the AT and mammary gland at sacrifice. HFD feedings of ovary intact mice resulted in increased adiposity and tumorigenesis, indicated by increased primary tumor volume, multiplicity, tumor burden, and increased tumor progression represented by histopathological scoring. HFD-induced obesity significantly upregulated aromatase and macrophage marker expression in the AT (F4/80 and CD11c) and mammary gland (Mertk) in a premenopausal model of BrCA. Conversely, HFD feedings had no significant effect on tumorigenesis in a postmenopausal model of BrCA despite large increases in adiposity in ovariectomized mice; however, limitations within the model may have precluded any significant findings. This data suggests that obesity-induced increases in inflammation and hormone production, via aromatase expression, is associated with increases in tumorigenesis in a model of premenopausal HP BrCA in the PyMT/MMTV strain.
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Affiliation(s)
- Taryn L Cranford
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Kandy T Velázquez
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Reilly T Enos
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Alexander T Sougiannis
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Jackie E Bader
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Meredith S Carson
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Rebecca R Bellone
- b Department of Population Health & Reproduction, School of Veterinary Medicine , University of California at Davis , Davis , CA , USA
| | - Ioulia Chatzistamou
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - Mitzi Nagarkatti
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
| | - E Angela Murphy
- a Department of Pathology, Microbiology & Immunology, School of Medicine , University of South Carolina , Columbia , SC , USA
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126
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Guchhait R, Chatterjee A, Mukherjee D, Pramanick K. Seasonal ovarian development in relation to the gonadotropins, steroids, aromatase and steroidogenic factor 1 (SF-1) in the banded gourami, Trichogaster fasciata. Gen Comp Endocrinol 2018; 268:40-49. [PMID: 30055147 DOI: 10.1016/j.ygcen.2018.07.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/22/2018] [Accepted: 07/24/2018] [Indexed: 02/07/2023]
Abstract
The endocrine regulation of gonadal development and annual variation of key sex steroids is the basic knowledge to understand the reproductive cycle of teleost fish. Present study was aimed to investigate the levels of gonadotropins in relation to the follicular development and plasma steroids during the reproductive cycle of female Trichogaster fasciata. Female fish were sampled and ovarian development is described histologically throughout the year in relation to the seasonal variations of gonadosomatic index (GSI); follicle stimulating hormone (FSH) and luteinizing hormone (LH); three key steroids for folliculogenesis and maturation i.e. testosterone (T), 17β-estradiol (E2) and 17α20βdihydroxy4pregnen3one (17,20β-P). Relatively higher level of FSH was observed till the ovary reaches in late vitellogenic stage confirms that FSH regulates the early folliculogenesis of the ovary, whereas LH peak was observed in the postvitellogenic stage, which indicates that maturation and ovulation were controlled by LH. Seasonal steroid profiles show that both T and E2 reach its maximum level prior to the 17,20β-P which attain its peak value in the month of August. Thus, single peak values of LH and 17,20β-P coinciding with GSI peak, clearly indicates that T. fasciata breeds only once in a year. Furthermore, to elucidate the molecular basis of the reproductive cycle, this study analyzes the other key factors of ovarian function such as cyp19a1a gene expression, aromatase activity and SF-1 localization throughout the year. cyp19a1a gene expression and the aromatase activity were highest in vitellogenic stages indicate that relatively higher E2 production in this stage is regulated by FSH. Immunohistochemical localizations of aromatase and SF-1 in the cellular layer of oocytes demonstrated that aromatase is FSH-dependent and SF-1 could be regulated by both FSH and LH as relatively higher amount of aromatase was localized in the vitellogenic stage oocytes than the postvitellogenic and post germinal vesicle breakdown (post-GVBD) stages; whereas, high amount of SF-1 was observed in vitellogenic, postvitellogenic and post-GVBD stages. These data regarding the reproductive endocrinology of T. fasciata may be useful to understand the interaction between gonadotropins, steroids, aromatase and SF-1 in teleost fishes and may contribute to restoration of the ecologically important fish through artificial reproduction.
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Affiliation(s)
- Rajkumar Guchhait
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Ankit Chatterjee
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Dilip Mukherjee
- Endocrinology Laboratory, Department of Zoology, University of Kalyani, Kalyani 741235, India
| | - Kousik Pramanick
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India.
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Rutherford R, Lister A, MacLatchy D. Comparison of steroidogenic gene expression in mummichog (Fundulus heteroclitus) testis tissue following exposure to aromatizable or non-aromatizable androgens. Comp Biochem Physiol B Biochem Mol Biol 2018; 227:39-49. [PMID: 30218714 DOI: 10.1016/j.cbpb.2018.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 09/06/2018] [Indexed: 02/08/2023]
Abstract
Androgens are a recognized class of endocrine disrupting compounds with the ability to impact reproductive status in aquatic organisms. The current study utilized in vitro exposure of mummichog (Fundulus heteroclitus) testis tissue to either the aromatizable androgen 17α-methyltestosterone (MT) or the non-aromatizable androgen 5α-dihydrotestosterone (DHT) over the course of 24 h to determine if there were differential effects on steroidogenic gene expression. Testis tissue was exposed to androgen concentrations of 10-12 M, 10-9 M and 10-6 M for 6, 12, 18 or 24 h, after which a suite of steroidogenic genes, including steroidogenic acute regulatory protein, 3β-hydroxysteroid dehydrogenase (3βhsd) and cytochrome P450 17A1 (cyp17a1), were quantified using real-time polymerase chain reaction. Both androgens affected steroidogenic gene expression, with most alterations occurring at the 24-hour time point. The gene with the highest fold-change, and shortest interval to expression alteration, was 3βhsd for both androgens. Potential differences between the two model androgens were observed in increased expression of cyp17a1 and 11β-hydroxysteroid dehydrogenase (11βhsd), which were only altered after exposure to DHT and in expression levels of cytochrome P450 11A1 (cyp11a1), which was upregulated by MT but not altered by DHT. Results from this study show both androgens interact at the gonadal level of the hypothalamus-pituitary-gonadal axis and may possess some distinct gene expression impacts. These data strengthen the current research initiatives of establishing in vitro test systems that allow toxic potential of untested chemicals to be predicted from molecular perturbations.
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Affiliation(s)
- Robert Rutherford
- Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON N2L 3C5, Canada.
| | - Andrea Lister
- Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON N2L 3C5, Canada
| | - Deborah MacLatchy
- Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON N2L 3C5, Canada
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128
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Affiliation(s)
- Saverio Cinti
- Professor of Human Anatomy, Director, Center of Obesity, University of Ancona (Politecnica delle Marche), Ancona, Italy
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129
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Chen ZP, Yan Y, Chen CJ, Li M, Chen C, Zhao SC, Song T, Liu T, Zou CH, Xu Q, Li X. The single nucleotide polymorphism rs700518 is an independent risk factor for metabolic syndrome and benign prostatic hyperplasia (MetS-BPH). Andrology 2018; 6:568-578. [PMID: 29873201 PMCID: PMC6646917 DOI: 10.1111/andr.12498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/01/2018] [Accepted: 04/04/2018] [Indexed: 02/06/2023]
Abstract
Studies have shown that 48.59% of benign prostate hyperplasia (BPH) is combined with metabolic syndrome (MetS). The mainstream view supports the correlation between MetS and BPH, but the pathogenesis of MetS‐BPH is not fully understood. Four hundred and seventy‐four men, aged 47 years or older, were recruited into this study by consecutive routine physical examination programs, and several parameters were obtained from each participant. Based on the diagnosis of BPH, MetS, and MetS‐BPH, the participants were divided into BPH and Non‐BPH groups, MetS and Non‐MetS groups, as well as MetS‐BPH and Non‐MetS‐BPH groups. The values of the obtained parameters were evaluated using Student's t‐test, chi‐square test, and logistic regression analysis. The value of estradiol (E2) was higher in the diseased groups (BPH, MetS, and MetS‐BPH groups) compared with the corresponding control groups (Non‐BPH, Non‐MetS, and Non‐MetS‐BPH groups), and the differences were statistically significant. Also, E2 had an independent association with BPH (OR = 2.286, 95% CI: 1.723–3.593, p < 0.001), MetS (OR = 1.406, 95% CI: 0.585–2.315, p < 0.001), and MetS‐BPH (OR = 1.249, 95% CI: 0.795–1.962, p < 0.001). Regarding SNPs of CYP19A1 gene, both the rs4646 genotypes (CC, CA, and AA) and the rs700518 genotypes (CC, CT, and TT) were present in every group, and all genotypes had statistically significant differences between the diseased and corresponding control groups. However, only the TT genotype of rs700518 was independently associated with BPH, MetS, and MetS‐BPH after adjusting for age. The TT genotype of rs700518 is an independent risk factor for the MetS‐BPH populations, and the CYP19A1 gene regulation of estrogen leads to MetS‐BPH.
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Affiliation(s)
- Z P Chen
- Department of Urology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.,Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - Y Yan
- Department of Urology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - C J Chen
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - M Li
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - C Chen
- Department of Urology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - S C Zhao
- Department of Urology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - T Song
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - T Liu
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - C H Zou
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - Q Xu
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
| | - X Li
- Department of Urology, Affiliated Hospital of Zunyi Medical College, Zunyi, China
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130
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Holtfrerich SKC, Pfister R, El Gammal AT, Bellon E, Diekhof EK. Endogenous testosterone and exogenous oxytocin influence the response to baby schema in the female brain. Sci Rep 2018; 8:7672. [PMID: 29769663 PMCID: PMC5955922 DOI: 10.1038/s41598-018-26020-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 05/03/2018] [Indexed: 12/23/2022] Open
Abstract
Nurturing behavior may be critically influenced by the interplay of different hormones. The neuropeptide oxytocin is known to promote maternal behavior and its reduction has been associated with postpartum depression risk and child neglect. Contrariwise, the observed decrease in testosterone level during early parenthood may benefit caretaking behavior, whereas increased testosterone may reduce attention to infants. Here we used functional magnetic resonance imaging to investigate the interactive influence of testosterone and oxytocin on selective attention to and neural processing of the baby schema (BS). 57 nulliparous women performed a target detection task with human faces with varying degree of BS following double-blinded placebo-controlled oxytocin administration in a between-subjects design. Our results support the idea that oxytocin enhances attention to the BS. Oxytocin had a positive effect on activation of the inferior frontal junction during identification of infant targets with a high degree of BS that were presented among adult distractors. Further, activation of the putamen was positively correlated with selective attention to the BS, but only in women with high endogenous testosterone who received oxytocin. These findings provide initial evidence for the neural mechanism by which oxytocin may counteract the negative effects of testosterone in the modulation of nurturing behavior.
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Affiliation(s)
- Sarah K C Holtfrerich
- Universität Hamburg, Faculty of Mathematics, Informatics and Natural Sciences, Department of Biology, Institute of Zoology, Neuroendocrinology Unit, Martin-Luther-King-Platz 3, D-20146, Hamburg, Germany.
| | - Roland Pfister
- Department of Psychology, Julius-Maximilians-University of Würzburg, D-97070, Würzburg, Germany
| | - Alexander T El Gammal
- General, Visceral and Thoracic Surgery Department, University Medical Center Hamburg-Eppendorf, D-20246, Hamburg, Germany
| | - Eugen Bellon
- General, Visceral and Thoracic Surgery Department, University Medical Center Hamburg-Eppendorf, D-20246, Hamburg, Germany
| | - Esther K Diekhof
- Universität Hamburg, Faculty of Mathematics, Informatics and Natural Sciences, Department of Biology, Institute of Zoology, Neuroendocrinology Unit, Martin-Luther-King-Platz 3, D-20146, Hamburg, Germany
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131
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Kim SD, Cho KS. Obstructive Sleep Apnea and Testosterone Deficiency. World J Mens Health 2018; 37:12-18. [PMID: 29774669 PMCID: PMC6305865 DOI: 10.5534/wjmh.180017] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 12/12/2022] Open
Abstract
Obstructive sleep apnea (OSA) is a common disorder characterized by intermittent hypoxia and sleep fragmentation. OSA in middle-aged men is often associated with decreased testosterone secretion, together with obesity and aging. Although OSA treatment does not reliably increase testosterone levels in most studies, OSA treatment with testosterone replacement therapy (TRT) may not only improve hypogonadism, but can also alleviate erectile/sexual dysfunction. However, because TRT may exacerbate OSA in some patients, patients should be asked about OSA symptoms before and after starting TRT. Furthermore, TRT should probably be avoided in patients with severe untreated OSA.
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Affiliation(s)
- Sung Dong Kim
- Department of Otorhinolaryngology and Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea
| | - Kyu Sup Cho
- Department of Otorhinolaryngology and Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea.
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132
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Frau R, Bortolato M. Repurposing steroidogenesis inhibitors for the therapy of neuropsychiatric disorders: Promises and caveats. Neuropharmacology 2018; 147:55-65. [PMID: 29907425 DOI: 10.1016/j.neuropharm.2018.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/07/2018] [Accepted: 05/10/2018] [Indexed: 12/29/2022]
Abstract
Steroids exert a profound influence on behavioral reactivity, by modulating the functions of most neurotransmitters and shaping the impact of stress and sex-related variables on neural processes. This background - as well as the observation that most neuroactive steroids (including sex hormones, glucocorticoids and neurosteroids) are synthetized and metabolized by overlapping enzymatic machineries - points to steroidogenic pathways as a powerful source of targets for neuropsychiatric disorders. Inhibitors of steroidogenic enzymes have been developed and approved for a broad range of genitourinary and endocrine dysfunctions, opening to new opportunities to repurpose these drugs for the treatment of mental problems. In line with this idea, preliminary clinical and preclinical results from our group have shown that inhibitors of key steroidogenic enzymes, such as 5α-reductase and 17,20 desmolase-lyase, may have therapeutic efficacy in specific behavioral disorders associated with dopaminergic hyperfunction. While the lack of specificity of these effects raises potential concerns about endocrine adverse events, these initial findings suggest that steroidogenesis modulators with greater brain specificity may hold significant potential for the development of alternative therapies for psychiatric problems. This article is part of the Special Issue entitled 'Drug Repurposing: old molecules, new ways to fast track drug discovery and development for CNS disorders'.
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Affiliation(s)
- Roberto Frau
- Department of Biomedical Sciences, Division of Neuroscience and Clinical Pharmacology, University of Cagliari, Monserrato CA, Italy; Tourette Syndrome Center, University of Cagliari, Monserrato CA, Italy; Sleep Medicine Center, University of Cagliari, Monserrato CA, Italy; National Institute of Neuroscience (INN), University of Cagliari, Monserrato CA, Italy.
| | - Marco Bortolato
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, USA.
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133
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Gérard C, Brown KA. Obesity and breast cancer - Role of estrogens and the molecular underpinnings of aromatase regulation in breast adipose tissue. Mol Cell Endocrinol 2018; 466:15-30. [PMID: 28919302 DOI: 10.1016/j.mce.2017.09.014] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 09/12/2017] [Accepted: 09/13/2017] [Indexed: 12/15/2022]
Abstract
One in eight women will develop breast cancer over their lifetime making it the most common female cancer. The cause of breast cancer is multifactorial and includes hormonal, genetic and environmental cues. Obesity is now an accepted risk factor for breast cancer in postmenopausal women, particularly for the hormone-dependent subtype of breast cancer. Obesity, which is characterized by an excess accumulation of body fat, is at the origin of chronic inflammation of white adipose tissue and is associated with dramatic changes in the biology of adipocytes leading to their dysfunction. Inflammatory factors found in the breast of obese women considerably impact estrogen signaling, mainly by driving changes in aromatase expression the enzyme responsible for estrogen production, and therefore promote tumor formation and progression. There is thus a strong link between adipose inflammation and estrogen biosynthesis and their signaling pathways converge in obese patients. This review describes how obesity-related factors can affect the risk of hormone-dependent breast cancer, highlighting the different molecular mechanisms and metabolic pathways involved in aromatase regulation, estrogen production and breast malignancy in the context of obesity.
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Affiliation(s)
- Céline Gérard
- Metabolism & Cancer Laboratory, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - Kristy A Brown
- Metabolism & Cancer Laboratory, Hudson Institute of Medical Research, Clayton, VIC, Australia; Department of Physiology, Monash University, Clayton, VIC, Australia; Department of Medicine, Weill Cornell Medicine, New York, NY, USA.
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134
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Aromatase inhibitors: A new approach for controlling ovarian function in cattle. Theriogenology 2018; 112:18-25. [DOI: 10.1016/j.theriogenology.2017.08.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 08/29/2017] [Accepted: 08/30/2017] [Indexed: 02/01/2023]
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135
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Schiffer L, Arlt W, Storbeck KH. Intracrine androgen biosynthesis, metabolism and action revisited. Mol Cell Endocrinol 2018; 465:4-26. [PMID: 28865807 PMCID: PMC6565845 DOI: 10.1016/j.mce.2017.08.016] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/28/2017] [Accepted: 08/28/2017] [Indexed: 12/19/2022]
Abstract
Androgens play an important role in metabolic homeostasis and reproductive health in both men and women. Androgen signalling is dependent on androgen receptor activation, mostly by testosterone and 5α-dihydrotestosterone. However, the intracellular or intracrine activation of C19 androgen precursors to active androgens in peripheral target tissues of androgen action is of equal importance. Intracrine androgen synthesis is often not reflected by circulating androgens but rather by androgen metabolites and conjugates. In this review we provide an overview of human C19 steroid biosynthesis including the production of 11-oxygenated androgens, their transport in circulation and uptake into peripheral tissues. We conceptualise the mechanisms of intracrinology and review the intracrine pathways of activation and inactivation in selected human tissues. The contribution of liver and kidney as organs driving androgen inactivation and renal excretion are also highlighted. Finally, the importance of quantifying androgen metabolites and conjugates to assess intracrine androgen production is discussed.
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Affiliation(s)
- Lina Schiffer
- Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Wiebke Arlt
- Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
| | - Karl-Heinz Storbeck
- Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; Department of Biochemistry, Stellenbosch University, Stellenbosch 7600, South Africa
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136
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Pedersen AL, Brownrout JL, Saldanha CJ. Neuroinflammation and neurosteroidogenesis: Reciprocal modulation during injury to the adult zebra finch brain. Physiol Behav 2018; 187:51-56. [DOI: 10.1016/j.physbeh.2017.10.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 10/11/2017] [Accepted: 10/11/2017] [Indexed: 01/10/2023]
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137
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Patel S, Homaei A, Raju AB, Meher BR. Estrogen: The necessary evil for human health, and ways to tame it. Biomed Pharmacother 2018; 102:403-411. [PMID: 29573619 DOI: 10.1016/j.biopha.2018.03.078] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 03/13/2018] [Accepted: 03/13/2018] [Indexed: 02/07/2023] Open
Abstract
Estrogen is a pivotal enzyme for survival and health in both genders, though their quantum, tropism, tissue-specific distribution, and receptor affinity varies with different phases of life. Converted from androgen via aromatase enzyme, this hormone is indispensable to glucose homeostasis, immune robustness, bone health, cardiovascular health, fertility, and neural functions. However, estrogen is at the center of almost all human pathologies as well-infectious, autoimmune, metabolic to degenerative. Both hypo and hyper level of estrogen has been linked to chronic and acute diseases. While normal aging is supposed to lower its level, leading to tissue degeneration (bone, muscle, neural etc.), and metabolite imbalance (glucose, lipid etc.), the increment in inflammatory agents in day-to-day life are enhancing the estrogen (or estrogen mimic) level, fueling 'estrogen dominance'. The resultant excess estrogen is inducing an overexpression of estrogen receptors (ERα and ERβ), harming tissues, leading to autoimmune diseases, and neoplasms. The unprecedented escalation in the polycystic ovary syndrome, infertility, breast cancer, ovary cancer, and gynecomastia cases are indicating that this sensitive hormone is getting exacerbated. This critical review is an effort to analyze the dual, and opposing facets of estrogen, via understanding its crosstalk with other hormones, enzymes, metabolites, and drugs. Why estrogen level correction is no trivial task, and how it can be restored to normalcy by a disciplined lifestyle with wise dietary and selective chemical usage choices has been discussed. Overall, our current state of knowledge does not disclose the full picture of estrogen's pleiotropic importance. Hence, this review should be a resource for general public as well as researchers to work in that direction.
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Affiliation(s)
- Seema Patel
- Bioinformatics and Medical Informatics Research Center, San Diego State University, 92182, San Diego, CA, USA.
| | - Ahmad Homaei
- Department of Marine Biology, Faculty of Marine Science and Technology, University of Hormozgan, Bandar Abbas, Iran; Department of Biology, Faculty of Sciences, University of Hormozgan, Bandar Abbas, Iran
| | - Akondi Butchi Raju
- Department of Pharmacology, Ibn Sina National College for Medical Studies, Jeddah, Saudi Arabia
| | - Biswa Ranjan Meher
- Department of Botany, Berhampur University, Berhampur, Odisha, 760007, India
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138
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Lorsch ZS, Loh YHE, Purushothaman I, Walker DM, Parise EM, Salery M, Cahill ME, Hodes GE, Pfau ML, Kronman H, Hamilton PJ, Issler O, Labonté B, Symonds AE, Zucker M, Zhang TY, Meaney MJ, Russo SJ, Shen L, Bagot RC, Nestler EJ. Estrogen receptor α drives pro-resilient transcription in mouse models of depression. Nat Commun 2018; 9:1116. [PMID: 29549264 PMCID: PMC5856766 DOI: 10.1038/s41467-018-03567-4] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 02/22/2018] [Indexed: 11/30/2022] Open
Abstract
Most people exposed to stress do not develop depression. Animal models have shown that stress resilience is an active state that requires broad transcriptional adaptations, but how this homeostatic process is regulated remains poorly understood. In this study, we analyze upstream regulators of genes differentially expressed after chronic social defeat stress. We identify estrogen receptor α (ERα) as the top regulator of pro-resilient transcriptional changes in the nucleus accumbens (NAc), a key brain reward region implicated in depression. In accordance with these findings, nuclear ERα protein levels are altered by stress in male and female mice. Further, overexpression of ERα in the NAc promotes stress resilience in both sexes. Subsequent RNA-sequencing reveals that ERα overexpression in NAc reproduces the transcriptional signature of resilience in male, but not female, mice. These results indicate that NAc ERα is an important regulator of pro-resilient transcriptional changes, but with sex-specific downstream targets.
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Affiliation(s)
- Zachary S Lorsch
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Yong-Hwee Eddie Loh
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Immanuel Purushothaman
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Deena M Walker
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Eric M Parise
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Marine Salery
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Michael E Cahill
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Georgia E Hodes
- School of Neuroscience, Virginia Polytechnic Institute and State University, 1981 Kraft Drive, Blacksburg, VA, 24061, USA
| | - Madeline L Pfau
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Hope Kronman
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Peter J Hamilton
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Orna Issler
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Benoit Labonté
- Department of Neuroscience and Psychiatry, Faculty of Medicine, Laval University, 2601 Chemin de la Canardière Québec, QC, G1J 2G3, Canada
| | - Ann E Symonds
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Matthew Zucker
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Tie Yuan Zhang
- Ludmer Centre for Neuroinformatics and Mental Health, Douglas Institute, Sackler Program for Epigenetics and Psychobiology, Departments of Psychiatry and Neurology and Neurosurgery, McGill University, 6875 Boulevard Lasalle, Montréal, QC, H4H 1R3, Canada
| | - Michael J Meaney
- Ludmer Centre for Neuroinformatics and Mental Health, Douglas Institute, Sackler Program for Epigenetics and Psychobiology, Departments of Psychiatry and Neurology and Neurosurgery, McGill University, 6875 Boulevard Lasalle, Montréal, QC, H4H 1R3, Canada
| | - Scott J Russo
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Li Shen
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA
| | - Rosemary C Bagot
- Departments of Psychology & Psychiatry, Ludmer Centre for Neuroinformatics and Mental Health, McGill University, 1205 Avenue Dr Penfield, Montréal, QC, H3A 1B1, Canada
| | - Eric J Nestler
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L Levy Place, New York, NY, 10029, USA.
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139
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Velásquez García HA, Sobolev BG, Gotay CC, Wilson CM, Lohrisch CA, Lai AS, Aronson KJ, Spinelli JJ. Mammographic non-dense area and breast cancer risk in postmenopausal women: a causal inference approach in a case-control study. Breast Cancer Res Treat 2018. [PMID: 29516373 DOI: 10.1007/s10549-018-4737-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
PURPOSE The association between high mammographic density (MD) and elevated breast cancer risk is well established. However, the role of absolute non-dense area remains unclear. We estimated the effect of the mammographic non-dense area and other density parameters on the risk of breast cancer. METHODS This study utilizes data from a population-based case-control study conducted in Greater Vancouver, British Columbia, with 477 female postmenopausal breast cancer cases and 588 female postmenopausal controls. MD measures were determined from digitized screening mammograms using computer-assisted software (Cumulus). Marginal odds ratios were estimated by inverse-probability weighting using a causal diagram for confounder selection. Akaike information criteria and receiver operating characteristic curves were used to assess the goodness of fit and predictive power of unconditional logistic models containing MD parameters. RESULTS The risk of breast cancer is 60% lower for the highest quartile compared to the lowest quartile of mammographic non-dense area (marginal OR 0.40, 95% CI 0.26-0.61, p-trend < 0.001). The cancer risk almost doubles for the highest quartile compared to the lowest quartile of dense area (marginal OR 1.81, 95% CI 1.19-2.43, p-trend < 0.001). For the highest quartile of percent density, breast cancer risk was more than three times higher than for the lowest quartile (marginal OR 3.15, 95% CI 1.90-4.40, p-trend < 0.001). No difference was seen in predictive accuracy between models using percent density alone, dense area alone, or non-dense area plus dense area. CONCLUSIONS In this study, non-dense area is an independent risk factor after adjustment for dense area and other covariates, inversely related with the risk of breast cancer. However, non-dense area does not improve prediction over that offered by percent density or dense area alone.
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Affiliation(s)
- Héctor A Velásquez García
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada. .,Department of Cancer Control Research, BC Cancer, Vancouver, BC, Canada.
| | - Boris G Sobolev
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Carolyn C Gotay
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | | | | | - Agnes S Lai
- Department of Cancer Control Research, BC Cancer, Vancouver, BC, Canada
| | - Kristan J Aronson
- Division of Cancer Care and Epidemiology, Department of Public Health Sciences, Cancer Research Institute, Queen's University, Kingston, ON, Canada
| | - John J Spinelli
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada.,Department of Cancer Control Research, BC Cancer, Vancouver, BC, Canada
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Boyd N, Berman H, Zhu J, Martin LJ, Yaffe MJ, Chavez S, Stanisz G, Hislop G, Chiarelli AM, Minkin S, Paterson AD. The origins of breast cancer associated with mammographic density: a testable biological hypothesis. Breast Cancer Res 2018. [PMID: 29514672 PMCID: PMC5842598 DOI: 10.1186/s13058-018-0941-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background Our purpose is to develop a testable biological hypothesis to explain the known increased risk of breast cancer associated with extensive percent mammographic density (PMD), and to reconcile the apparent paradox that although PMD decreases with increasing age, breast cancer incidence increases. Methods We used the Moolgavkar model of carcinogenesis as a framework to examine the known biological properties of the breast tissue components associated with PMD that includes epithelium and stroma, in relation to the development of breast cancer. In this model, normal epithelial cells undergo a mutation to become intermediate cells, which, after further mutation, become malignant cells. A clone of such cells grows to become a tumor. The model also incorporates changes with age in the number of susceptible epithelial cells associated with menarche, parity, and menopause. We used measurements of the radiological properties of breast tissue in 4454 healthy subjects aged from 15 to 80+ years to estimate cumulative exposure to PMD (CBD) in the population, and we examined the association of CBD with the age-incidence curve of breast cancer in the population. Results Extensive PMD is associated with a greater number of breast epithelial cells, lobules, and fibroblasts, and greater amounts of collagen and extracellular matrix. The known biological properties of these tissue components may, singly or in combination, promote the acquisition of mutations by breast epithelial cells specified by the Moolgavkar model, and the subsequent growth of a clone of malignant cells to form a tumor. We also show that estimated CBD in the population from ages 15 to 80+ years is closely associated with the age-incidence curve of breast cancer in the population. Conclusions These findings are consistent with the hypothesis that the biological properties of the breast tissue components associated with PMD increase the probability of the transition of normal epithelium to malignant cells, and that the accumulation of mutations with CBD may influence the age-incidence curve of breast cancer. This hypothesis gives rise to several testable predictions. Electronic supplementary material The online version of this article (10.1186/s13058-018-0941-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Norman Boyd
- Princess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada.
| | - Hal Berman
- Princess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada
| | - Jie Zhu
- Princess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada
| | - Lisa J Martin
- Princess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada
| | - Martin J Yaffe
- Imaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Sofia Chavez
- Imaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Greg Stanisz
- Imaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | | | | | - Salomon Minkin
- Princess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada
| | - Andrew D Paterson
- Genetics and Genome Biology, Hospital for Sick Children Research Institute, Toronto, ON, Canada.,Divisions of Epidemiology and Biostatistics, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
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141
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Lundqvist J, Kirkegaard T, Laenkholm AV, Duun-Henriksen AK, Bak M, Feldman D, Lykkesfeldt AE. Williams syndrome transcription factor (WSTF) acts as an activator of estrogen receptor signaling in breast cancer cells and the effect can be abrogated by 1α,25-dihydroxyvitamin D 3. J Steroid Biochem Mol Biol 2018; 177:171-178. [PMID: 28610873 DOI: 10.1016/j.jsbmb.2017.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 05/28/2017] [Accepted: 06/06/2017] [Indexed: 12/22/2022]
Abstract
A majority of estrogen receptor positive (ER+) breast cancers are growth stimulated by estrogens. The ability to inhibit the ER signaling pathway is therefore of critical importance in the current treatment of ER+ breast cancers. It has been reported that 1α,25-dihydroxyvitamin D3 down-regulates the expression of the CYP19A1 gene, encoding the aromatase enzyme that catalyzes the synthesis of estradiol. Furthermore, 1α,25-dihydroxyvitamin D3 has also been reported to down-regulate the expression of estrogen receptor α (ERα), the main mediator of ER signaling. This study reports a novel transcription factor critical to 1α,25-dihydroxyvitamin D3-mediated regulation of estrogenic signaling in MCF-7 breast cancer cells. We have investigated the molecular mechanisms for the 1α,25-dihydroxyvitamin D3-mediated down-regulation of CYP19A1 and ERα gene expression in human MCF-7 breast cancer cells and found that Williams syndrome transcription factor (WSTF) plays a key role by binding to the promoters of CYP19A1 and ERα. Although sometimes reported as an inhibitor of gene expression, we found that WSTF acts as an activator of the promoter activity of both CYP19A1 and ERα. Silencing of WSTF by siRNA transfection resulted in decreased aromatase-dependent cell growth as well as decreased ER signaling in the cells. When cells were treated with 1α,25-dihydroxyvitamin D3, WSTF was dissociated from the promoters and the promoter activities of CYP19A1 and ERα were decreased. We have measured the expression of WSTF in ER-positive tumor-samples from breast cancer patients and found that WSTF is expressed in the majority of the investigated samples and that the expression is higher in cancer tissue than in normal tissue. However, we were not able to show any significant association between the WSTF expression in the tumor and the disease free and overall survival in this patient group who have received adjuvant tamoxifen treatment, nor between the WSTF expression and the expression of ERα, progesterone receptor or HER2. The major conclusions of this study are that WSTF acts as an activator of ER signaling in MCF-7 breast cancer cells, that this action can be inhibited by 1α,25-dihydroxyvitamin D3, and that the expression of WSTF is higher in breast cancer tissue than in normal tissue. WSTF may by a new target for treatment of estrogen-dependent breast cancer cell growth.
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Affiliation(s)
- Johan Lundqvist
- Breast Cancer Group, Cell Death and Metabolism, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen, Denmark; Swedish University of Agricultural Sciences, Department of Biomedical Sciences and Veterinary Public Health, P.O. Box 7028, SE-750 07 Uppsala, Sweden.
| | - Tove Kirkegaard
- Breast Cancer Group, Cell Death and Metabolism, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen, Denmark
| | - Anne-Vibeke Laenkholm
- Department of Surgical Pathology, Zealand University Hospital, Ingemannsvej 48, DK-4200 Slagelse, Denmark
| | - Anne Katrine Duun-Henriksen
- Statistics, Bioinformatics and Registry, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Martin Bak
- Department of Pathology, Odense University Hospital, Odense, DK-5000 Denmark
| | - David Feldman
- Division of Endocrinology, Gerontology and Metabolism, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, United States
| | - Anne E Lykkesfeldt
- Breast Cancer Group, Cell Death and Metabolism, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen, Denmark
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142
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Nie X, Xie R, Tuo B. Effects of Estrogen on the Gastrointestinal Tract. Dig Dis Sci 2018; 63:583-596. [PMID: 29387989 DOI: 10.1007/s10620-018-4939-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 01/19/2018] [Indexed: 02/06/2023]
Abstract
Estrogen is a kind of steroid compound that has extensive biologic activities. The effect of estrogen is pleiotropic, affecting multiple systems in the body. There is accumulating evidence that estrogen has important effects on the gastrointestinal tract. Longer exposure to estrogen may decrease the risk of gastric cancer. Use of the anti-estrogen drug tamoxifen might increase the risk of gastric adenocarcinoma. Estrogen receptor β may serve as a target for colorectal cancer prevention. In addition, estrogen has been reported to be closely related to the mucosal barrier, gastrointestinal function and intestinal inflammation. However, the role of estrogen in the gastrointestinal tract has not been systematically summarized. In this review, we aim to provide an overview of the role of estrogen in the gastrointestinal tract and evaluate it from various aspects, including estrogen receptors, the mucosal barrier, intestinal inflammation and gastrointestinal tract tumors, which may provide the basis for the development of therapeutic strategies to manage gastrointestinal diseases.
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Affiliation(s)
- Xubiao Nie
- Department of Gastroenterology, Affiliated Hospital, Zunyi Medical College, 149 Dalian Road, Zunyi, 563003, China
| | - Rui Xie
- Department of Gastroenterology, Affiliated Hospital, Zunyi Medical College, 149 Dalian Road, Zunyi, 563003, China
| | - Biguang Tuo
- Department of Gastroenterology, Affiliated Hospital, Zunyi Medical College, 149 Dalian Road, Zunyi, 563003, China.
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143
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Murakami K, Hata S, Miki Y, Sasano H. Aromatase in normal and diseased liver. Horm Mol Biol Clin Investig 2018; 41:/j/hmbci.ahead-of-print/hmbci-2017-0081/hmbci-2017-0081.xml. [PMID: 29489455 DOI: 10.1515/hmbci-2017-0081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 01/12/2018] [Indexed: 12/21/2022]
Abstract
Background A potential correlation between sex hormones, such as androgens and estrogens, and the development and progression of hepatocellular carcinoma (HCC) has been proposed. However, its details, in particular, aromatase status in diseased human liver has remained largely unknown. Materials and methods We immunolocalized aromatase, 17β-hydroxysteroid dehydrogenase (17β-HSD) type 1 and 17β-HSD type 2 in a total of 155 cases, consisting of normal liver (n = 10), nonalcoholic steatohepatitis (NASH) (n = 18), primary sclerosing cholangitis (PSC) (n = 6), primary biliary cholangitis (PBC) (n = 13), biliary atresia (n = 18), alcoholic hepatitis (n = 11), hepatitis C virus (HCV) (n = 31), HCV sustained virologic response (HCV-SVR) (n = 10), hepatitis B virus (HBV) (n = 20), HBV sustained virologic response (HBV-SVR) (n = 8) and infants (n = 10). Results Immunoreactivity scores of aromatase in HBV (59.5 ± 30.9), HBV-SVR (68.1 ± 33.5) and infants (100.5 ± 36.6) were significantly higher than those in normal liver (26.0 ± 17.1). Scores of 17β-HSD type 1 in any etiology other than HBV (116.3 ± 23.7) and infants (120.0 ± 28.5) were significantly lower than those in normal liver (122.5 ± 8.6). Scores of 17β-HSD type 2 in NASH (74.4 ± 36.6) were significantly lower than those in normal liver (128.0 ± 29.7). Conclusion High immunoreactivity scores of aromatase and 17β-HSD type 1 in the patients with HBV suggest a correlation between HBV infection and in situ estrogen synthesis in hepatocytes.
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Affiliation(s)
- Keigo Murakami
- Department of Pathology, Tohoku University Hospital, 1-1 Seiryou-machi, Aoba-ku,Sendai 980-8574, Japan, Phone: +81-22-7177440, Fax: +81-22-7177449
| | - Shuko Hata
- Division of Pathology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yasuhiro Miki
- Department of Disaster Obstetrics and Gynecology, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Hironobu Sasano
- Department of Pathology, Tohoku University Hospital, Sendai, Japan
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144
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Hudon Thibeault AA, Vaillancourt C, Sanderson JT. Profile of CYP19A1 mRNA expression and aromatase activity during syncytialization of primary human villous trophoblast cells at term. Biochimie 2018; 148:12-17. [PMID: 29474975 DOI: 10.1016/j.biochi.2018.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 02/19/2018] [Indexed: 11/26/2022]
Abstract
Estrogen production by the human villous trophoblast is dependent on the biosynthetic enzyme aromatase (CYP19; CYP19A1) and is crucial for successful placental development and pregnancy outcome. Using villous cytotrophoblast cells (vCTs) freshly isolated from normal term placenta, we characterized the promoter-specific expression of CYP19A1 mRNA (derived from promoters I.1, I.4, I.8 or total transcript) and aromatase activity during villous trophoblast syncytialization. CYP19A1 mRNA levels and aromatase activity in vCTs reached a maximum after about 48 h of culture. The cAMP inducer forskolin (10 μM) and protein kinase C stimulant phorbol myristate acetate (1 μM) increased CYP19A1 mRNA levels by 1.8- and 1.6-fold, respectively, as well as inducing aromatase catalytic activity. Dexamethasone (100 nM) and vascular endothelial growth factor (5 ng/mL) decreased CYP19A1 mRNA levels, while having no effect on aromatase activity. Our results emphasize the importance of not solely studying CYP19A1 regulation and function at the mRNA level but also considering posttranslational mechanisms that alter the final catalytic activity of aromatase.
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Affiliation(s)
- Andrée-Anne Hudon Thibeault
- INRS-Institut Armand-Frappier, 531 boul. des Prairies, Laval, QC, H7V 1B7, Canada; BioMed Research Centre, Université du Québec à Montréal, C.P. 8888, succ. Centre-ville, Montréal, QC, H3C 3P8, Canada; Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (Cinbiose), Université du Québec à Montréal, C.P. 8888, succ. Centre-ville, Montréal, QC, H3C 3P8, Canada.
| | - Cathy Vaillancourt
- INRS-Institut Armand-Frappier, 531 boul. des Prairies, Laval, QC, H7V 1B7, Canada; BioMed Research Centre, Université du Québec à Montréal, C.P. 8888, succ. Centre-ville, Montréal, QC, H3C 3P8, Canada; Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (Cinbiose), Université du Québec à Montréal, C.P. 8888, succ. Centre-ville, Montréal, QC, H3C 3P8, Canada.
| | - J Thomas Sanderson
- INRS-Institut Armand-Frappier, 531 boul. des Prairies, Laval, QC, H7V 1B7, Canada.
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145
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Morais-Santos M, Werneck-Gomes H, Campolina-Silva GH, Santos LC, Mahecha GAB, Hess RA, Oliveira CA. Basal Cells Show Increased Expression of Aromatase and Estrogen Receptor α in Prostate Epithelial Lesions of Male Aging Rats. Endocrinology 2018; 159:723-732. [PMID: 29121167 DOI: 10.1210/en.2017-00773] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 11/01/2017] [Indexed: 12/16/2022]
Abstract
Besides androgens, estrogen signaling plays a key role in normal development and pathologies of the prostate. Irreversible synthesis of estrogens from androgens is catalyzed by aromatase. Interestingly, animals lacking aromatase do not develop cancer or prostatitis, whereas those with overexpression of aromatase and, consequently, high estrogen levels develop prostatitis and squamous metaplasia via estrogen receptor 1 (ERα). Even with this evidence, the aromatase expression in the prostate is controversial. Moreover, little is known about the occurrence of age-dependent variation of aromatase and its association with histopathological changes commonly found in advanced age, a knowledge gap that is addressed herein. For this purpose, the immunoexpression of aromatase was evaluated in the prostatic complex of young adult to senile Wistar rats. ERα was also investigated, to extend our understanding of estrogen responsiveness in the prostate. Moderate cytoplasmic immunoreactivity for aromatase was detected in the glandular epithelium. Eventually, some basal cells showed intense staining for aromatase. The expression pattern for aromatase appeared similar in the normal epithelium when young and senile rats were compared; this result was corroborated by Western blotting. Conversely, in senile rats, there was an increase in the frequency of basal cells intensely stained for aromatase, which appeared concentrated in areas of intraepithelial proliferation and prostatitis. These punctual areas also presented increased ERα positivity. Together, these findings suggest a plausible source for hormonal imbalance favoring estrogen production, which, by acting through ERα, may favor the development of prostatic lesions commonly found in advanced age.
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Affiliation(s)
- Mônica Morais-Santos
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Animal Biology, Universidade Federal de Viçosa,, Viçosa, Minas Gerais, Brazil
| | - Hipácia Werneck-Gomes
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gabriel H Campolina-Silva
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leticia C Santos
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Germán A B Mahecha
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rex A Hess
- Department of Comparative Biosciences, University of Illinois, Urbana, Illinois
| | - Cleida A Oliveira
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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146
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Guchhait R, Chatterjee A, Gupta S, Debnath M, Mukherjee D, Pramanick K. Molecular mechanism of mercury-induced reproductive impairments in banded gourami, Trichogaster fasciata. Gen Comp Endocrinol 2018; 255:40-48. [PMID: 29037848 DOI: 10.1016/j.ygcen.2017.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 10/01/2017] [Accepted: 10/10/2017] [Indexed: 10/18/2022]
Abstract
Mercury is one of the key pollutants responsible for the degradation of natural aquatic ecosystems. Among the different forms of mercury that exist in the environment, mercuric chloride (HgCl2) is the dominant pollutant for freshwater environments as it is used as an ingredient in antiseptics, disinfectants and preservatives, insecticides, batteries and in metallurgical and photographic operations. Pollutant may exert their action on organisms or populations by affecting their normal endocrine function as well as reproduction. Thus, the present study tried to understand the effect of mercuric chloride (HgCl2) on reproductive function and to decipher the molecular mechanism of Hg-induced reproductive impairments of female Trichogaster fasciata. Both in vivo and in vitro experiments were performed by using ecologically relevant doses of HgCl2 and the resulting effects on follicular development, steroidogenic potentiality, aromatase activity, aromatase gene expression and steroidogenic factor-1 (SF-1) expression pattern were analysed. In vivo exposure to HgCl2 caused reproductive impairments as shown by the inhibitory role of HgCl2 on follicular development, steroid biosynthesis and SF-1 activity. In vitro experiments revealed that aromatase activity, steroidogenesis, aromatase and SF-1 expression were blocked by HgCl2. The results obtained from this study contribute to understand the molecular mechanism of HgCl2-induced reproductive impairment of T. fasciata.
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Affiliation(s)
- Rajkumar Guchhait
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Ankit Chatterjee
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Shreyasi Gupta
- Department of Zoology, University of Kalyani, Kalyani 741235, India
| | - Manashi Debnath
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Dilip Mukherjee
- Department of Zoology, University of Kalyani, Kalyani 741235, India
| | - Kousik Pramanick
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India.
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147
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Relation among Aromatase P450 and Tumoral Growth in Human Prolactinomas. Int J Mol Sci 2017; 18:ijms18112299. [PMID: 29104246 PMCID: PMC5713269 DOI: 10.3390/ijms18112299] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 10/25/2017] [Accepted: 10/27/2017] [Indexed: 02/01/2023] Open
Abstract
The pituitary gland is part of hypothalamic-pituitary–gonadal axis, which controls development, reproduction, and aging in humans and animals. In addition, the pituitary gland is regulated mainly by hormones and neurotransmitters released from the hypothalamus and by systemic hormones secreted by target glands. Aromatase P450, the enzyme responsible for the catabolization of aromatizable androgens to estrogens, is expressed in different parts of body, including the pituitary gland. Moreover, aromatase P450 is involved in sexual dimorphism where alteration in the level of aromatase can initiate a number of diseases in both genders. On the other hand, the direct actions of estrogens, mainly estradiol, are well known for stimulating prolactin release. Numerous studies have shown that changes in the levels of estrogens, among other factors, have been implicated in the genesis and development of prolactinoma. The pituitary gland can produce estradiol locally in several types of endocrine cells, and it is possible that aromatase could be responsible for the maintenance of the population of lactotroph cells and the modulation of the action of central or peripheral regulators. Aromatase overexpression due to inappropriate gene regulation has clinical effects such as the pathogenesis of prolactinomas. The present study reports on the synthesis of pituitary aromatase, its regulation by gonadal steroids, and the physiological roles of aromatase on pituitary endocrine cells. The involvement of aromatase in the pathogenesis of pituitary tumors, mainly prolactinomas, through the auto-paracrine production of estradiol is reviewed.
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148
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Al-Mukaynizi FB, Alanazi M, Al-Daihan S, Parine NR, Almadi M, Aljebreen A, Azzam N, Alharbi O, Arafah M, Warsy A. CYP19A1 gene polymorphism and colorectal cancer etiology in Saudi population: case-control study. Onco Targets Ther 2017; 10:4559-4567. [PMID: 29066910 PMCID: PMC5604566 DOI: 10.2147/ott.s121557] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Considerable interest is directed toward the enzyme aromatase (CYP19A1) and the development of cancer, due to CYP19A1's role in estrogen biosynthesis. Several cancers display excessive intra-tumor accumulation of estrogens, and aromatase inhibitors are used for treatment. The CYP19A1 gene exhibits polymorphism and mutations that can alter its expression or aromatase activity and influence estrogen production. We designed this study to investigate the link between CYP19A1 polymorphism and susceptibility to colorectal cancer (CRC) development in Saudis. PATIENTS AND METHODS Blood samples from 100 CRC patients and 100 healthy controls were drawn for DNA extractions. Three polymorphic sites, rs4774585, rs936308, and rs4775936, were genotyped using Taqman genotyping by real-time polymerase chain reaction. Allelic and genotype frequencies were calculated and compared in the two groups. RESULTS All single nucleotide polymorphisms (SNPs) were polymorphic in Saudis, and comparison of allele frequencies showed several differences when compared to other populations. None of the SNPs were associated with the risk of CRC development in Saudis (P>0.05). Some gender and location (colon or rectal) differences were observed. DISCUSSION The results of this study highlighted the genetic heterogeneity existing between populations in the prevalence of different SNPs and their relation to disease state. It showed that, although rs4774585, rs936308, and rs4775936 are involved in CRC development in several populations, their role is not significant in the etiology of CRC in Saudis; however, some SNPs do increase susceptibility or resistance to CRC development as judged from the odds ratio. Further large-scale studies are warranted to clarify the role of the CYP19A1 development in CRC.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Maha Arafah
- Department of Pathology, College of Medicine
| | - Arjumand Warsy
- Central Laboratory, Female Center for Scientific & Medical Colleges, King Saud University, Riyadh, Saudi Arabia
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149
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Gárriz Á, Del Fresno PS, Miranda LA. Exposure to E 2 and EE 2 environmental concentrations affect different components of the Brain-Pituitary-Gonadal axis in pejerrey fish (Odontesthes bonariensis). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 144:45-53. [PMID: 28601516 DOI: 10.1016/j.ecoenv.2017.06.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 05/29/2017] [Accepted: 06/02/2017] [Indexed: 05/12/2023]
Abstract
The present study focuses on the effects of E2 and EE2 environmental concentrations on different components of the reproductive axis of pejerrey (Odontesthes bonariensis), a native fish species from Pampas lakes of Argentina. The results obtained demonstrated that E2 and EE2 separate or mixed, could disrupt key pathways of the pejerrey Brain-Pituitary-Gonadal axis. First, it was observed that at the brain level, gnrh-III and cyp19a1b mRNA expression increased significantly in the exposed fish. Secondly, in the pituitary fshb and lhb mRNA expression levels, the study did not show any differences between treated and control groups. Thirdly, fshr and lhcgr transcript levels showed a significant decrease at testicular level. Nevertheless, testosterone plasmatic levels remained unchanged in exposed fish. In addition, in a histological analysis, it was possible to find pyknotic nuclei in estrogen only on treated fish testis linked to a reduction in the GSI index and a decrease in the length of spermatogenic lobules. All these findings highlighted the fact that environmental concentrations of E2, EE2 and their mixture disrupted the endocrine-reproductive axis of pejerrey, being the testis the main direct target.
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Affiliation(s)
- Ángela Gárriz
- Laboratorio de Ictiofisiología y Acuicultura, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín", IIB-INTECH (CONICET-UNSAM), Intendente Marino Km. 8.200 (B7130IWA), Chascomús, Buenos Aires, Argentina
| | - Pamela S Del Fresno
- Laboratorio de Ictiofisiología y Acuicultura, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín", IIB-INTECH (CONICET-UNSAM), Intendente Marino Km. 8.200 (B7130IWA), Chascomús, Buenos Aires, Argentina
| | - Leandro A Miranda
- Laboratorio de Ictiofisiología y Acuicultura, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín", IIB-INTECH (CONICET-UNSAM), Intendente Marino Km. 8.200 (B7130IWA), Chascomús, Buenos Aires, Argentina.
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150
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Schroeder AL, Ankley GT, Habib T, Garcia-Reyero N, Escalon BL, Jensen KM, Kahl MD, Durhan EJ, Makynen EA, Cavallin JE, Martinovic-Weigelt D, Perkins EJ, Villeneuve DL. Rapid effects of the aromatase inhibitor fadrozole on steroid production and gene expression in the ovary of female fathead minnows (Pimephales promelas). Gen Comp Endocrinol 2017; 252:79-87. [PMID: 28736226 PMCID: PMC6010346 DOI: 10.1016/j.ygcen.2017.07.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/19/2017] [Accepted: 07/19/2017] [Indexed: 10/19/2022]
Abstract
Cytochrome P450 aromatase catalyzes conversion of C19 androgens to C18 estrogens and is critical for normal reproduction in female vertebrates. Fadrozole is a model aromatase inhibitor that has been shown to suppress estrogen production in the ovaries of fish. However, little is known about the early impacts of aromatase inhibition on steroid production and gene expression in fish. Adult female fathead minnows (Pimephales promelas) were exposed via water to 0, 5, or 50µg fadrozole/L for a time-course of 0.5, 1, 2, 4, and 6h, or 0 or 50µg fadrozole/L for a time-course of 6, 12, and 24h. We examined ex vivo ovarian 17β-estradiol (E2) and testosterone (T) production, and plasma E2 concentrations from each study. Expression profiles of genes known or hypothesized to be impacted by fadrozole including aromatase (cytochrome P450 [cyp] 19a1a), steriodogenic acute regulatory protein (star), cytochrome P450 side-chain cleavage (cyp11a), cytochrome P450 17 alpha hydroxylase/17,20 lyase (cyp17), and follicle stimulating hormone receptor (fshr) were measured in the ovaries by quantitative real-time polymerase chain reaction (QPCR). In addition, broader ovarian gene expression was examined using a 15k fathead minnow microarray. The 5µg/L exposure significantly reduced ex vivo E2 production by 6h. In the 50µg/L treatment, ex vivo E2 production was significantly reduced after just 2h of exposure and remained depressed at all time-points examined through 24h. Plasma E2 concentrations were significantly reduced as early as 4h after initiation of exposure to either 5 or 50µg fadrozole/L and remained depressed throughout 24h in the 50µg/L exposure. Ex vivo T concentrations remained unchanged throughout the time-course. Expression of transcripts involved in steroidogenesis increased within the first 24h suggesting rapid induction of a mechanism to compensate for fadrozole inhibition of aromatase. Microarray results also showed fadrozole exposure caused concentration- and time-dependent changes in gene expression profiles in many HPG-axis pathways as early as 4h. This study provides insights into the very rapid effects of aromatase inhibition on steroidogenic processes in fish.
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Affiliation(s)
- Anthony L Schroeder
- University of Minnesota - Twin Cities, Water Resources Center, 1985 Lower Buford Circle, St. Paul, MN 55108, United States
| | - Gerald T Ankley
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA
| | - Tanwir Habib
- Badger Technical Services, San Antonio, TX 78216, USA
| | - Natalia Garcia-Reyero
- US Army Engineer Research and Development Center - Environmental Laboratory, Vicksburg, MS 39180, United States
| | - Barbara L Escalon
- US Army Engineer Research and Development Center - Environmental Laboratory, Vicksburg, MS 39180, United States
| | - Kathleen M Jensen
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA
| | - Michael D Kahl
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA
| | - Elizabeth J Durhan
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA
| | - Elizabeth A Makynen
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA
| | - Jenna E Cavallin
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA
| | - Dalma Martinovic-Weigelt
- University of St. Thomas, Department of Biology, Mail OWS 390, 2115 Summit Ave, St. Paul, MN 55105, United States
| | - Edward J Perkins
- US Army Engineer Research and Development Center - Environmental Laboratory, Vicksburg, MS 39180, United States
| | - Daniel L Villeneuve
- US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Duluth, MN, USA.
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