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Tabęcka-Łonczyńska A, Koszła O, Sołek P. Unraveling the anti-androgenic mechanism of tris(2,3-dibromopropyl) isocyanurate (TBC) via the non-classical testosterone pathway and steroidogenesis: Potential human reproductive health implications. CHEMOSPHERE 2024; 363:142802. [PMID: 38996977 DOI: 10.1016/j.chemosphere.2024.142802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 07/04/2024] [Accepted: 07/06/2024] [Indexed: 07/14/2024]
Abstract
The decline in male reproductive health, characterized by diminishing sperm count and testosterone levels, has raised concerns about environmental influences, particularly endocrine-disrupting chemicals (EDCs). Tris(2,3-dibromopropyl)isocyanurate (TBC), a novel brominated flame retardant widely used in electronics, textiles, and furniture, has emerged as a significant environmental contaminant with potential reproductive health implications. In this study, we investigated the molecular mechanisms underlying TBC-induced reproductive toxicity, particularly focusing on its impact on steroidogenesis and androgen signaling pathways using the GC-1 spg cell line as an in vitro model. Exposure of GC-1 spg cells to TBC, alone or in combination with testosterone or the anti-androgen flutamide resulted in decreased metabolic activity and increased lactate dehydrogenase release, indicating cytotoxic effects. Furthermore, TBC exposure led to a reduction in progesterone synthesis, while testosterone production remained unaffected. Interestingly, estradiol synthesis was diminished after TBC exposure, suggesting a disruption in steroid hormone balance critical for spermatogenesis. Mechanistic investigations revealed alterations in key proteins involved in the non-classical testosterone pathway and steroidogenesis. TBC exposure downregulated epidermal growth factor receptor (EGFR), protein kinase B (AKT), and phosphorylated cyclic AMP response element-binding protein (p-CREB), indicating suppression of non-classical androgen signaling. Additionally, decreased levels of steroidogenic acute regulatory protein (StAR) and 3-beta-hydroxysteroid dehydrogenase (HSD3β1) suggest impaired steroidogenesis. Here we uncover the intricate molecular mechanisms underlying TBC-induced reproductive toxicity, highlighting its potential to disrupt steroid hormone synthesis and androgen signaling pathways. Understanding the adverse effects of TBC on male reproductive health is crucial for developing strategies to mitigate its environmental impact and safeguard human fertility.
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Affiliation(s)
- Anna Tabęcka-Łonczyńska
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, Sucharskiego 2, 35-225, Rzeszów, Poland.
| | - Oliwia Koszła
- Department of Biopharmacy, Medical University of Lublin, Chodźki 4a, 20-093, Lublin, Poland.
| | - Przemysław Sołek
- Department of Biopharmacy, Medical University of Lublin, Chodźki 4a, 20-093, Lublin, Poland; Department of Biochemistry and Toxicology, University of Life Sciences, Akademicka 13, 20-950, Lublin, Poland.
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2
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Li H, Yuan H, Yang ZP, Song Y, Wang JJ, Wen Q, Zheng YX, Zhang XX, Yu M, Yuan ZG. Differential transcriptome study on the damage of testicular tissues caused by chronic infection of T. gondii in mice. Parasit Vectors 2024; 17:252. [PMID: 38858789 PMCID: PMC11165745 DOI: 10.1186/s13071-024-06247-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 03/15/2024] [Indexed: 06/12/2024] Open
Abstract
BACKGROUND Toxoplasma gondii is an intracellular protozoan parasite that is widely distributed in humans and warm-blooded animals. T. gondii chronic infections can cause toxoplasmic encephalopathy, adverse pregnancy, and male reproductive disorders. In male reproduction, the main function of the testis is to provide a stable place for spermatogenesis and immunological protection. The disorders affecting testis tissue encompass abnormalities in the germ cell cycle, spermatogenic retardation, or complete cessation of sperm development. However, the mechanisms of interaction between T. gondii and the reproductive system is unclear. The aims were to study the expression levels of genes related to spermatogenesis, following T. gondii infection, in mouse testicular tissue. METHODS RNA-seq sequencing was carried out on mouse testicular tissues from mice infected or uninfected with the T. gondii type II Prugniaud (PRU) strain and validated in combination with real-time quantitative PCR and immunofluorescence assays. RESULTS The results showed that there were 250 significant differentially expressed genes (DEGs) (P < 0.05, |log2fold change| ≧ 1). Bioinformatics analysis showed that 101 DEGs were annotated to the 1696 gene ontology (GO) term. While there was a higher number of DEGs in the biological process classification as a whole, the GO enrichment revealed a significant presence of DEGs in the cellular component classification. The Arhgap18 and Syne1 genes undergo regulatory changes following T. gondii infection, and both were involved in shaping the cytoskeleton of the blood-testis barrier (BTB). The number of DEGs enriched in the MAPK signaling pathway, the ERK1/2 signaling pathway, and the JNK signaling pathway were significant. The PTGDS gene is located in the Arachidonic acid metabolism pathway, which plays an important role in the formation and maintenance of BTB in the testis. The expression of PTGDS is downregulated subsequent to T. gondii infection, potentially exerting deleterious effects on the integrity of the BTB and the spermatogenic microenvironment within the testes. CONCLUSIONS Overall, our research provides in-depth insights into how chronic T. gondii infection might affect testicular tissue and potentially impact male fertility. These findings offer a new perspective on the impact of T. gondii infection on the male reproductive system.
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Affiliation(s)
- Haoxin Li
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Hao Yuan
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Zi-Peng Yang
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Yining Song
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Jun-Jie Wang
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Qingyuan Wen
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Yu-Xiang Zheng
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Xiu-Xiang Zhang
- College of Plant, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
| | - Miao Yu
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510140 People’s Republic of China
| | - Zi-Guo Yuan
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642 Guangdong People’s Republic of China
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3
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Lonc G, Hrabia A, Krakowska I, Korzekwa AJ, Zarzycka M, Wolak D, Wajdzik M, Kotula-Balak M. Is membrane androgen and estrogen receptor signaling imperative in the governing function of the adrenal cortex in the Eurasian beaver (Castor fiber L.)? JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2024; 341:587-596. [PMID: 38497306 DOI: 10.1002/jez.2806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/04/2024] [Accepted: 02/15/2024] [Indexed: 03/19/2024]
Abstract
There is a need to fully know the physiology of Eurasian beaver due to its essential role in environmental homeostasis. However, a "human factor" impacts this, including stress conditions and environmental pollution. Adrenal glands protect these all. The regulation of endocrine processes by nonclassical androgen and estrogen signaling, the first and fastest control, is still a matter of research. The specific analyses performed here in mature female and male beaver adrenals contained: anatomical and histological examinations, expression and localization of membrane androgen receptor (zinc transporter, Zinc- and Iron-like protein 9; ZIP9) and membrane estrogen receptor coupled with G protein (GPER), and measurement of zinc (Zn2+) and copper (Ca2+) ion levels and corticosterone levels. We revealed normal anatomical localization, size, and tissue histology in female and male beavers, respectively. Equally, ZIP9 and GPER were localized in the membrane of all adrenal cortex cells. The protein expression of these receptors was higher (p < 0.001) in male than female adrenal cortex cells. Similarly, Zn2+ and Ca2+ ion levels were higher (p < 0.05, p < 0.01) in male than female adrenal cortex. The increased corticosterone levels (p < 0.001) were detected in the adrenal cortex of females when compared to males. The present study is the first to report the presence of nonclassical androgen and estrogen signaling and its possible regulatory function in the adrenal cortex of Eurasian beavers. We assume that this first-activated and fast-transmitted regulation can be important in the context of the effect of environmental physical and chemical stressors especially on adrenal cortex cells. The beaver adrenals may constitute an additional supplementary model for searching for universal mechanisms of adrenal cortex physiology and diseases.
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Affiliation(s)
- G Lonc
- Department of Animal Anatomy and Preclinical Sciences, University Centre of Veterinary Medicine JU-UA, University of Agriculture in Krakow, Krakow, Poland
| | - A Hrabia
- Department of Animal Physiology and Endocrinology, Faculty of Animal Science, University of Agriculture in Krakow, Krakow, Poland
| | - I Krakowska
- Department of Animal Anatomy and Preclinical Sciences, University Centre of Veterinary Medicine JU-UA, University of Agriculture in Krakow, Krakow, Poland
| | - A J Korzekwa
- Department of Biodiversity Protection, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - M Zarzycka
- Department of Medical Biochemistry, Jagiellonian University Medical College, Krakow, Poland
| | - D Wolak
- Department of Animal Physiology and Endocrinology, Faculty of Animal Science, University of Agriculture in Krakow, Krakow, Poland
| | - M Wajdzik
- Department of Forest Biodiversity, Faculty of Forestry, University of Agriculture, Krakow, Poland
| | - M Kotula-Balak
- Department of Animal Anatomy and Preclinical Sciences, University Centre of Veterinary Medicine JU-UA, University of Agriculture in Krakow, Krakow, Poland
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Piasecki J, Škarabot J, Spillane P, Piasecki M, Ansdell P. Sex Differences in Neuromuscular Aging: The Role of Sex Hormones. Exerc Sport Sci Rev 2024; 52:54-62. [PMID: 38329342 DOI: 10.1249/jes.0000000000000335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Males and females experience different trajectories of neuromuscular function across the lifespan, with females demonstrating accelerated deconditioning in later life. We hypothesize that the menopause is a critical period in the female lifespan, during which the dramatic reduction in sex hormone concentrations negatively impacts synaptic input to the motoneuron pool, as well as motor unit discharge properties.
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Affiliation(s)
- Jessica Piasecki
- Sport, Health and Performance Enhancement Research Centre, Nottingham Trent University, Nottingham, UK
| | - Jakob Škarabot
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Padraig Spillane
- Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
| | - Mathew Piasecki
- Centre of Metabolism, Ageing and Physiology (COMAP), MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research, National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, UK
| | - Paul Ansdell
- Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
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Su J, Song Y, Yang Y, Li Z, Zhao F, Mao F, Wang D, Cao G. Study on the changes of LHR, FSHR and AR with the development of testis cells in Hu sheep. Anim Reprod Sci 2023; 256:107306. [PMID: 37541020 DOI: 10.1016/j.anireprosci.2023.107306] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 08/06/2023]
Abstract
The process of testis development in mammals is accompanied by the proliferation and maturation of Sertoli, Leydig and germ cells. Spermatogenesis depends on hormone regulation, which must bind to a receptor to exert its biological effects. The changes in Hu sheep testis cell composition and FSHR, LHR and AR expression during different developmental stages are unclear (newborn, puberty and adulthood). To address this, using single-cell RNA sequencing, we analyzed testis cell composition and hormone receptor expression changes during three important developmental stages of Hu sheep. We observed significant changes in the composition of somatic and germ cells in different Hu sheep testis developmental stages. Furthermore, we analyzed the FSHR, LHR and AR distribution and expression changes at three important periods and verified them by qRT-PCR and immunofluorescence. Our results suggest that after birth, the proportion of germ cells increased gradually, peaking in adulthood; the proportion of Sertoli cells decreased gradually, reaching the lowest in adulthood; and the proportion of Leydig cells increased and then decreased, reaching the lowest in adulthood. In addition, FSHR, LHR and AR are mainly located in Sertoli, Leydig and germ cells. LHR and FSHR expression decreased with increasing age, while AR expression increased and then decreased with increasing age.
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Affiliation(s)
- Jie Su
- Department of Medical Neurobiology, Inner Mongolia Medical University, Huhhot 010030, China; Inner Mongolia Key Laboratory of Basic Veterinary Science, Inner Mongolia Agriculture University, Hohhot 010018, China
| | - Yongli Song
- Research Center for Animal Genetic Resources of Mongolia Plateau, Inner Mongolia University, Huhhot 010021, China
| | - Yanyan Yang
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Huhhot 010000, China
| | - Zhijun Li
- Department of Medical Neurobiology, Inner Mongolia Medical University, Huhhot 010030, China
| | - Feifei Zhao
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Inner Mongolia Agriculture University, Hohhot 010018, China
| | - Fei Mao
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Inner Mongolia Agriculture University, Hohhot 010018, China
| | - Daqing Wang
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Inner Mongolia Agriculture University, Hohhot 010018, China; Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Huhhot 010000, China
| | - Guifang Cao
- Inner Mongolia Key Laboratory of Basic Veterinary Science, Inner Mongolia Agriculture University, Hohhot 010018, China.
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de Oliveira ACF, Brito VGB, Ramos GHADS, Werlang MLC, Fiais GA, Dornelles RCM, Antoniali C, Nakamune ACMS, Fakhouri WD, Chaves-Neto AH. Analysis of salivary flow rate, biochemical composition, and redox status in orchiectomized spontaneously hypertensive rats. Arch Oral Biol 2023; 152:105732. [PMID: 37257259 DOI: 10.1016/j.archoralbio.2023.105732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 06/02/2023]
Abstract
OBJECTIVE This study aimed to analyze the salivary flow rate, biochemical composition, and redox status in orchiectomized spontaneously hypertensive rats (SHR) compared to normotensive Wistar rats. DESIGN Thirty-two young adult male SHR and Wistar (3-months-old) rats were randomly distributed into four groups; either castrated bilaterally (ORX) or underwent fictitious surgery (SHAM) as Wistar-SHAM, Wistar-ORX, SHR-SHAM, and SHR-ORX. Two months beyond castration, pilocarpine-induced salivary secretion was collected from 5-month-old rats to analyze salivary flow rate, pH, buffer capacity, total protein, amylase, calcium, phosphate, sodium, potassium, chloride, thiobarbituric acid reactive substances (TBARs), carbonyl protein, nitrite, and total antioxidant capacity. RESULTS The salivary flow rate was higher in the Wistar-ORX compared to the Wistar-SHAM group, while remaining similar between the SHR-SHAM and SHR-ORX groups. ORX did not affect pH and salivary buffer capacity in both strains. However, salivary total protein and amylase were significantly reduced in the Wistar-ORX and SHR-ORX compared to the respective SHAM groups. In both ORX groups, salivary total antioxidant capacity and carbonylated protein were increased, while lipid oxidative damage (TBARs) and nitrite concentration were higher only in the Wistar-ORX than in the Wistar-SHAM group. In the Wistar-ORX and SHR-ORX, the salivary calcium, phosphate, and chloride were increased while no change was detected in the SHAM groups. Only salivary buffering capacity, calcium, and chloride in the SHR-ORX adjusted to values similar to Wistar-SHAM group. CONCLUSION Hypertensive phenotype mitigated the orchiectomy-induced salivary dysfunction, since the disturbances were restricted to alterations in the salivary biochemical composition and redox state.
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Affiliation(s)
| | - Victor Gustavo Balera Brito
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | | | - Matheus Lima Cypriano Werlang
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Gabriela Alice Fiais
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Rita Cássia Menegati Dornelles
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Cristina Antoniali
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação em Ciência Odontológica, School of Dentistry, Araçatuba, São Paulo, Brazil
| | | | - Walid D Fakhouri
- Center for Craniofacial Research, Department of Diagnostic and Biomedical Sciences, School of Dentistry, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Antonio Hernandes Chaves-Neto
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação em Ciência Odontológica, School of Dentistry, Araçatuba, São Paulo, Brazil.
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Karatt TK, Sathiq MA, Laya S, Karakka Kal AK, Subhahar MB, M P MA, Philip M, Graiban FM, Caveney MR. Metabolic study of selective androgen receptor modulator LY2452473 in thoroughbred horses for doping control. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2023; 37:e9491. [PMID: 36758220 DOI: 10.1002/rcm.9491] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
RATIONALE Since 2010, there has been an increasing number of adverse analytical findings related to selective androgen receptor modulators (SARMs) in competitive sports. It emphasizes the importance of comprehensive doping control analytical procedures that are capable of detecting SARM misuse. METHODS In this study, it is described how LY2452473, a SARM, was metabolized in thoroughbred horses after a single-dose oral administration and in vitro with equine liver microsome preparations. An investigation of the metabolism of LY2452473 in horses' urine, plasma, and hair matrices was carried out during the study. The plausible structures of the detected metabolites were postulated using high-performance liquid chromatography-high resolution mass spectrometry. RESULTS Under the experimental conditions 15 metabolites (12 phase I and three conjugates of phase I) were detected (M1-M15). The major phase I metabolites identified were formed by hydroxylation. Side-chain dissociated and methylated metabolites were also detected. In phase II, the glucuronic acid and sulfonic acid conjugates of hydroxy LY2452473 were detected as the major metabolites. In vitro analysis has confirmed the presence of all metabolites found in vivo except for the methylated analogs M11 and M12. A peak concentration of LY2452473 (0.5 pg/mg) in proximal hair segments was achieved 4 weeks after administration, according to hair analysis. CONCLUSIONS Data obtained will aid in identifying LY2452473 and related substances faster. Furthermore, the results will assist in checking for the illegal use of these substances in competitive sports.
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Affiliation(s)
- Tajudheen K Karatt
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
- Post Graduate and Research Department of Chemistry, Jamal Mohamed College (Affiliated to Bharathidasan University), Tiruchirappalli, Tamil Nadu, India
| | - M Anwar Sathiq
- Post Graduate and Research Department of Chemistry, Jamal Mohamed College (Affiliated to Bharathidasan University), Tiruchirappalli, Tamil Nadu, India
| | - Saraswathy Laya
- Department of Chemistry, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates
| | | | | | - Muhammed Ajeebsanu M P
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Moses Philip
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Fatma Mohammed Graiban
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
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Cook KM, De Asis-Cruz J, Lopez C, Quistorff J, Kapse K, Andersen N, Vezina G, Limperopoulos C. Robust sex differences in functional brain connectivity are present in utero. Cereb Cortex 2023; 33:2441-2454. [PMID: 35641152 PMCID: PMC10016060 DOI: 10.1093/cercor/bhac218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 05/09/2022] [Accepted: 05/09/2022] [Indexed: 11/14/2022] Open
Abstract
Sex-based differences in brain structure and function are observable throughout development and are thought to contribute to differences in behavior, cognition, and the presentation of neurodevelopmental disorders. Using multiple support vector machine (SVM) models as a data-driven approach to assess sex differences, we sought to identify regions exhibiting sex-dependent differences in functional connectivity and determine whether they were robust and sufficiently reliable to classify sex even prior to birth. To accomplish this, we used a sample of 110 human fetal resting state fMRI scans from 95 fetuses, performed between 19 and 40 gestational weeks. Functional brain connectivity patterns classified fetal sex with 73% accuracy. Across SVM models, we identified features (functional connections) that reliably differentiated fetal sex. Highly consistent predictors included connections in the somatomotor and frontal areas alongside the hippocampus, cerebellum, and basal ganglia. Moreover, high consistency features also implicated a greater magnitude of cross-region connections in females, while male weighted features were predominately within anatomically bounded regions. Our findings indicate that these differences, which have been observed later in childhood, are present and reliably detectable even before birth. These results show that sex differences arise before birth in a manner that is consistent and reliable enough to be highly identifiable.
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Affiliation(s)
- Kevin M Cook
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Josepheen De Asis-Cruz
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Catherine Lopez
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Jessica Quistorff
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Kushal Kapse
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Nicole Andersen
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Gilbert Vezina
- Division of Diagnostic Imaging and Radiology, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
| | - Catherine Limperopoulos
- Developing Brain Institute, Children’s National, 111 Michigan Ave NW, Washington DC 20010, USA
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9
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Colón L, Peru E, Zuloaga DG, Poulos AM. Contributions of gonadal hormones in the sex-specific organization of context fear learning. PLoS One 2023; 18:e0282293. [PMID: 36862730 PMCID: PMC9980802 DOI: 10.1371/journal.pone.0282293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 02/11/2023] [Indexed: 03/03/2023] Open
Abstract
It is widely established that gonadal hormones are fundamental to modulating and organizing the sex-specific nature of reproductive behaviors. Recently we proposed that context fear conditioning (CFC) may emerge in a sex-specific manner organized prior to the pubertal surge of gonadal hormones. Here we sought to determine the necessity of male and female gonadal hormones secreted at critical periods of development upon context fear learning. We tested the organizational hypothesis that neonatal and pubertal gonadal hormones play a permanent role in organizing contextual fear learning. We demonstrate that the postnatal absence of gonadal hormones by neonatal orchiectomy (oRX) in males and ovariectomy (oVX) in females resulted in an attenuation of CFC in adult males and an enhancement of CFC in adult females. In females, the gradual introduction of estrogen before conditioning partially rescued this effect. However, the decrease of CFC in adult males was not rescued by introducing testosterone before conditioning. Next, at a further point in development, preventing the pubertal surge of gonadal hormones by prepubertal oRX in males resulted in a reduction in adult CFC. In contrast, in females, prepubertal oVX did not alter adult CFC. However, the adult introduction of estrogen in prepubertal oVX rats reduced adult CFC. Lastly, the adult-specific deletion of gonadal hormones by adult oRX or oVX alone or replacement of testosterone or estrogen did not alter CFC. Consistent with our hypothesis, we provide initial evidence that gonadal hormones at early periods of development exert a vital role in the organization and development of CFC in male and female rats.
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Affiliation(s)
- Lorianna Colón
- Department of Psychology and Center for Neuroscience Research, State University of New York at Albany, Albany, NY, United States of America
| | - Eduardo Peru
- Department of Psychology and Center for Neuroscience Research, State University of New York at Albany, Albany, NY, United States of America
| | - Damian G. Zuloaga
- Department of Psychology and Center for Neuroscience Research, State University of New York at Albany, Albany, NY, United States of America
| | - Andrew M. Poulos
- Department of Psychology and Center for Neuroscience Research, State University of New York at Albany, Albany, NY, United States of America
- * E-mail:
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10
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Cardoso ME, Decuadra P, Zeni M, Delfino A, Tejería E, Coppe F, Mesa JM, Daher G, Giglio J, Carrau G, Gamenara D, Alonso O, Terán M, Rey A. Development and Evaluation of 99mTc Tricarbonyl Complexes Derived from Flutamide with Affinity for Androgen Receptor. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020820. [PMID: 36677878 PMCID: PMC9863320 DOI: 10.3390/molecules28020820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/07/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
With the objective to develop a potential 99mTc radiopharmaceutical for imaging the androgen receptor (AR) in prostate cancer, four ligands bearing the same pharmacophore derived from the AR antagonist flutamide were prepared, labeled with 99mTc, and their structures corroborated via comparison with the corresponding stable rhenium analogs. All complexes were obtained with high radiochemical purity. Three of the complexes were highly stable, and, due to their favorable physicochemical properties, were further evaluated using AR-positive and AR-negative cells in culture. All complexes exhibited considerable uptake in AR-positive cells, which could be blocked by an excess of flutamide. The efflux from the cells was moderate. They also showed significantly lower uptakes in AR-negative cells, indicating interactions with the AR receptor. However, the binding affinities were considerably reduced by the coordination to 99mTc, and the complex that exhibited the best biological behavior did not show sufficient specificity towards AR-positive cells.
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Affiliation(s)
- María Elena Cardoso
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Paula Decuadra
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Maia Zeni
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Agustín Delfino
- Organic Chemistry Department, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Emilia Tejería
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Fátima Coppe
- Centro de Medicina Nuclear e Imagenología Molecular-Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Av.Italia s/n, Montevideo CP11400, Uruguay
| | - Juan Manuel Mesa
- Organic Chemistry Department, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Grysette Daher
- Organic Chemistry Department, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Javier Giglio
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Gonzalo Carrau
- Organic Chemistry Department, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Daniela Gamenara
- Organic Chemistry Department, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Omar Alonso
- Centro de Medicina Nuclear e Imagenología Molecular-Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Av.Italia s/n, Montevideo CP11400, Uruguay
| | - Mariella Terán
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
| | - Ana Rey
- Radiochemistry Area, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo CP11800, Uruguay
- Correspondence: ; Tel.: +598-2924-8571
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11
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Zhao H, Zhang J, Cheng X, Nie X, He B. Insulin resistance in polycystic ovary syndrome across various tissues: an updated review of pathogenesis, evaluation, and treatment. J Ovarian Res 2023; 16:9. [PMID: 36631836 PMCID: PMC9832677 DOI: 10.1186/s13048-022-01091-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 12/26/2022] [Indexed: 01/12/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is a common endocrine disorder characterized by chronic ovulation dysfunction and overabundance of androgens; it affects 6-20% of women of reproductive age. PCOS involves various pathophysiological factors, and affected women usually have significant insulin resistance (IR), which is a major cause of PCOS. IR and compensatory hyperinsulinaemia have differing pathogeneses in various tissues, and IR varies among different PCOS phenotypes. Genetic and epigenetic changes, hyperandrogenaemia, and obesity aggravate IR. Insulin sensitization drugs are a new treatment modality for PCOS. We searched PubMed, Google Scholar, Elsevier, and UpToDate databases in this review, and focused on the pathogenesis of IR in women with PCOS and the pathophysiology of IR in various tissues. In addition, the review provides a comprehensive overview of the current progress in the efficacy of insulin sensitization therapy in the management of PCOS, providing the latest evidence for the clinical treatment of women with PCOS and IR.
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Affiliation(s)
- Han Zhao
- grid.412467.20000 0004 1806 3501Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning 110000 People’s Republic of China
| | - Jiaqi Zhang
- grid.412467.20000 0004 1806 3501Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning 110000 People’s Republic of China
| | - Xiangyi Cheng
- grid.412467.20000 0004 1806 3501Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning 110000 People’s Republic of China
| | - Xiaozhao Nie
- grid.412467.20000 0004 1806 3501Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning 110000 People’s Republic of China
| | - Bing He
- Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning, 110000, People's Republic of China.
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12
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Bowman R, Frankfurt M, Luine V. Sex differences in cognition following variations in endocrine status. Learn Mem 2022; 29:234-245. [PMID: 36206395 PMCID: PMC9488023 DOI: 10.1101/lm.053509.121] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/03/2022] [Indexed: 11/24/2022]
Abstract
Spatial memory, mediated primarily by the hippocampus, is responsible for orientation in space and retrieval of information regarding location of objects and places in an animal's environment. Since the hippocampus is dense with steroid hormone receptors and is capable of robust neuroplasticity, it is not surprising that changes in spatial memory performance occur following a variety of endocrine alterations. Here, we review cognitive changes in both spatial and nonspatial memory tasks following manipulations of the hypothalamic-pituitary-adrenal and gonadal axes and after exposure to endocrine disruptors in rodents. Chronic stress impairs male performance on numerous behavioral cognitive tasks and enhances or does not impact female cognitive function. Sex-dependent changes in cognition following stress are influenced by both organizational and activational effects of estrogen and vary depending on the developmental age of the stress exposure, but responses to gonadal hormones in adulthood are more similar than different in the sexes. Also discussed are possible underlying neural mechanisms for these steroid hormone-dependent, cognitive effects. Bisphenol A (BPA), an endocrine disruptor, given at low levels during adolescent development, impairs spatial memory in adolescent male and female rats and object recognition memory in adulthood. BPA's negative effects on memory may be mediated through alterations in dendritic spine density in areas that mediate these cognitive tasks. In summary, this review discusses the evidence that endocrine status of an animal (presence or absence of stress hormones, gonadal hormones, or endocrine disruptors) impacts cognitive function and, at times, in a sex-specific manner.
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Affiliation(s)
- Rachel Bowman
- Department of Psychology, Sacred Heart University, Fairfield, Connecticut 06825, USA
| | - Maya Frankfurt
- Department of Psychology, Sacred Heart University, Fairfield, Connecticut 06825, USA
- Hofstra Northwell School of Nursing and Physician Assistant Studies, Hofstra University, Hempstead, New York 11549, USA
| | - Victoria Luine
- Department of Psychology, Hunter College of City University of New York, New York, New York 10065, USA
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13
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Shen D, Peng H, Xia C, Deng Z, Tong X, Wang G, Qian K. The Role of Long Non-Coding RNAs in Epithelial-Mesenchymal Transition-Related Signaling Pathways in Prostate Cancer. Front Mol Biosci 2022; 9:939070. [PMID: 35923466 PMCID: PMC9339612 DOI: 10.3389/fmolb.2022.939070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/10/2022] [Indexed: 11/17/2022] Open
Abstract
Prostate cancer (PCa) is one of the most common male malignancies with frequent remote invasion and metastasis, leading to high mortality. Epithelial-mesenchymal transition (EMT) is a fundamental process in embryonic development and plays a key role in tumor proliferation, invasion and metastasis. Numerous long non-coding RNAs (lncRNAs) could regulate the occurrence and development of EMT through various complex molecular mechanisms involving multiple signaling pathways in PCa. Given the importance of EMT and lncRNAs in the progression of tumor metastasis, we recapitulate the research progress of EMT-related signaling pathways regulated by lncRNAs in PCa, including AR signaling, STAT3 signaling, Wnt/β-catenin signaling, PTEN/PI3K/AKT signaling, TGF-β/Smad and NF-κB signaling pathways. Furthermore, we summarize four modes of how lncRNAs participate in the EMT process of PCa via regulating relevant signaling pathways.
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Affiliation(s)
- Dexin Shen
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
- Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China
| | - Hongwei Peng
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Caixia Xia
- President’s Office, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhao Deng
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xi Tong
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Gang Wang
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
- Human Genetic Resource Preservation Center of Hubei Province, Wuhan, China
- *Correspondence: Gang Wang, ; Kaiyu Qian,
| | - Kaiyu Qian
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
- Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
- Human Genetic Resource Preservation Center of Hubei Province, Wuhan, China
- *Correspondence: Gang Wang, ; Kaiyu Qian,
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Luine V, Mohan G, Attalla S, Jacome L, Frankfurt M. Androgens Enhance Recognition Memory and Dendritic Spine Density in the Hippocampus and Prefrontal Cortex of Ovariectomized Female Rats. Neuroscience 2022:S0306-4522(22)00287-1. [PMID: 35671881 PMCID: PMC9719572 DOI: 10.1016/j.neuroscience.2022.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/28/2022] [Accepted: 06/01/2022] [Indexed: 12/28/2022]
Abstract
Estrogen replacement has been repeatedly shown to enhance memory and increase dendritic spine density in the hippocampus and prefrontal cortex of ovariectomized (OVX) female rats. Given the potential deleterious effects of chronic estrogen administration, the present study assessed cognitive function using recognition memory tasks and measured dendritic spine density in the CA1 region of the hippocampus and medial prefrontal cortex after subchronic androgen replacement to adult OVX female rats. All androgens enhanced recognition memory in OVX rats, but object placement (OP) and object recognition (OR) results differed. Only testosterone enhanced OR. Testosterone had no effect on OP while dehydroepiandrosterone (DHEA), dihydrotestosterone (DHT) and androstenedione (AD) enhanced OP. Dendritic spine density was increased by both TP and DHEA in both brain areas (DHT and AD were not tested). Lastly, we used the aromatase inhibitor, letrozole, to discriminate between potential androgenic and estrogenic effects of androgens on behavior. Letrozole alone did not alter recognition memory in OVX rats and did not block the effects of either TP or DHEA on recognition memory suggesting that effects were mediated via androgenic mechanisms. The present results expand previous information on gonadal hormone actions and show that, in addition to estrogens, androgens also improve memory and increase spine density in brains of OVX female rats. While requiring further investigation, these observations provide a basis for therapeutic interventions in the treatment of menopausal, age or disease related memory loss.
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Affiliation(s)
- Victoria Luine
- Department of Psychology, Hunter College, 695 Park Avenue, New York, NY 10065, United States.
| | - Govini Mohan
- Department of Psychology, Hunter College, 695 Park Avenue, New York, NY 10065, United States
| | - Sara Attalla
- Department of Psychology, Hunter College, 695 Park Avenue, New York, NY 10065, United States
| | - Luis Jacome
- Department of Psychology, Hunter College, 695 Park Avenue, New York, NY 10065, United States
| | - Maya Frankfurt
- Hofstra Northwell School of Nursing and Physician Assistant Studies, 160 Hofstra University, 400A Shapiro Family Hall, Hempstead, NY 11549, United States
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15
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Sharp JL, Pearson T, Smith MA. Sex differences in opioid receptor mediated effects: Role of androgens. Neurosci Biobehav Rev 2022; 134:104522. [PMID: 34995646 PMCID: PMC8872632 DOI: 10.1016/j.neubiorev.2022.104522] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/19/2021] [Accepted: 01/02/2022] [Indexed: 12/26/2022]
Abstract
An abundance of data indicates there are sex differences in endogenous opioid peptides and opioid receptors, leading to functional differences in sensitivity to opioid receptor mediated behaviors between males and females. Many of these sex differences are mediated by the effects of gonadal hormones on the endogenous opioid system. Whereas much research has examined the role of ovarian hormones on opioid receptor mediated endpoints, comparatively less research has examined the role of androgens. This review describes what is currently known regarding the influence of androgens on opioid receptor mediated endpoints and how androgens may contribute to sex differences in these effects. The review also addresses the clinical implications of androgenic modulation of opioid receptor mediated behaviors and suggests future lines of research for preclinical and clinical investigators. We conclude that further investigation into androgenic modulation of opioid receptor mediated effects may lead to new options for addressing conditions such as chronic pain and substance use disorders.
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Affiliation(s)
- Jessica L Sharp
- Department of Psychology and Program in Neuroscience, Davidson College, United States
| | - Tallia Pearson
- Department of Psychology and Program in Neuroscience, Davidson College, United States
| | - Mark A Smith
- Department of Psychology and Program in Neuroscience, Davidson College, United States.
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16
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Cypriano ML, Dos Santos Ramos GHA, de Oliveira ACF, Dos Santos DR, Fiais GA, de Oliveira AP, Antoniali C, Dornelles RCM, de Melo Stevanato Nakamune AC, Chaves-Neto AH. Effect of testosterone replacement therapy and mate tea (Ilex paraguariensis) on biochemical, functional and redox parameters of saliva in orchiectomized rats. Arch Oral Biol 2021; 132:105289. [PMID: 34695671 DOI: 10.1016/j.archoralbio.2021.105289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 10/08/2021] [Accepted: 10/12/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Evaluate the effects of testosterone replacement therapy (TRT) and mate tea (MT) [Ilex paraguariensis] on biochemical, functional, and redox parameters of saliva in orchiectomized rats (ORX) DESIGN: Sixty young adult male Wistar rats (3 months old) were either castrated bilaterally or underwent fictitious surgery (SHAM) and were distributed into 5 groups: SHAM, ORX, TU (castrated rats that received a single intramuscular injection of testosterone undecanoate 100 mg/kg), MT (castrated rats that received MT 20 mg/kg, via intragastric gavage, daily), and TU + MT. All treatments started 4 weeks after castration (4 months old) and lasted 4 weeks (5 months old). At the end of treatment, pilocarpine-induced salivary secretion was collected to analyze salivary flow rate (SFR) and biochemistry composition through determination of total protein (TP), amylase (AMY), electrolyte, and biomarkers of oxidative stress. RESULTS ORX increased SFR, salivary buffering capacity, calcium, phosphate, chloride, total antioxidant capacity, thiobarbituric acid reactive substances (TBARs), and carbonyl protein, reduced TP and AMY activity, and did not change pH, sodium, and potassium compared to SHAM. TU and TU+MT restored all salivary parameters to values of SHAM, while only TBARs and AMY returned to SHAM levels in the MT group. CONCLUSIONS TRT with long-acting TU restored the biochemical, functional, and redox parameters of saliva in orchiectomized rats. Although MT did not have a TRT-like effect on salivary gland function, the more effective reduction in lipid oxidative damage in the MT and TU + MT groups could be considered as adjuvant to alleviate the salivary oxidative stress induced by orchiectomy.
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Affiliation(s)
- Matheus Lima Cypriano
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | | | | | - Damáris Raissa Dos Santos
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Gabriela Alice Fiais
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Arthur Passos de Oliveira
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Cristina Antoniali
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Rita Cássia Menegati Dornelles
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Ana Cláudia de Melo Stevanato Nakamune
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Antonio Hernandes Chaves-Neto
- Department of Basic Sciences, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas - SBFis, São Paulo State University (Unesp), School of Dentistry, Araçatuba, São Paulo, Brazil.
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17
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Li Z, Wang S, Gong C, Hu Y, Liu J, Wang W, Chen Y, Liao Q, He B, Huang Y, Luo Q, Zhao Y, Xiao Y. Effects of Environmental and Pathological Hypoxia on Male Fertility. Front Cell Dev Biol 2021; 9:725933. [PMID: 34589489 PMCID: PMC8473802 DOI: 10.3389/fcell.2021.725933] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/23/2021] [Indexed: 12/28/2022] Open
Abstract
Male infertility is a widespread health problem affecting approximately 6%-8% of the male population, and hypoxia may be a causative factor. In mammals, two types of hypoxia are known, including environmental and pathological hypoxia. Studies looking at the effects of hypoxia on male infertility have linked both types of hypoxia to poor sperm quality and pregnancy outcomes. Hypoxia damages testicular seminiferous tubule directly, leading to the disorder of seminiferous epithelium and shedding of spermatogenic cells. Hypoxia can also disrupt the balance between oxidative phosphorylation and glycolysis of spermatogenic cells, resulting in impaired self-renewal and differentiation of spermatogonia, and failure of meiosis. In addition, hypoxia disrupts the secretion of reproductive hormones, causing spermatogenic arrest and erectile dysfunction. The possible mechanisms involved in hypoxia on male reproductive toxicity mainly include excessive ROS mediated oxidative stress, HIF-1α mediated germ cell apoptosis and proliferation inhibition, systematic inflammation and epigenetic changes. In this review, we discuss the correlations between hypoxia and male infertility based on epidemiological, clinical and animal studies and enumerate the hypoxic factors causing male infertility in detail. Demonstration of the causal association between hypoxia and male infertility will provide more options for the treatment of male infertility.
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Affiliation(s)
- Zhibin Li
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China.,Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, China
| | - Sumin Wang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Chunli Gong
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Yiyang Hu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Jiao Liu
- Department of Endoscope, The General Hospital of Shenyang Military Region, Liaoning, China
| | - Wei Wang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Yang Chen
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Qiushi Liao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Bing He
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China.,Department of Laboratory Medicine, General Hospital of Northern Theater Command, Shenyang, China
| | - Yu Huang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Qiang Luo
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Yongbing Zhao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Yufeng Xiao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
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Abstract
Resident progenitor and/or stem cell populations in the adult adrenal cortex enable cortical cells to undergo homeostatic renewal and regeneration after injury. Renewal occurs predominantly in the outer layers of the adrenal gland but newly formed cells undergo centripetal migration, differentiation and lineage conversion in the process of forming the different functional steroidogenic zones. Over the past 10 years, advances in the genetic characterization of adrenal diseases and studies of mouse models with altered adrenal phenotypes have helped to elucidate the molecular pathways that regulate adrenal tissue renewal, several of which are fine-tuned via complex paracrine and endocrine influences. Moreover, the adrenal gland is a sexually dimorphic organ, and testicular androgens have inhibitory effects on cell proliferation and progenitor cell recruitment in the adrenal cortex. This Review integrates these advances, including the emerging role of sex hormones, into existing knowledge on adrenocortical cell renewal. An in-depth understanding of these mechanisms is expected to contribute to the development of novel therapies for severe endocrine diseases, for which current treatments are unsatisfactory.
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Affiliation(s)
- Rodanthi Lyraki
- Université Côte d'Azur, INSERM, CNRS, Institut de Biologie Valrose, Nice, France
| | - Andreas Schedl
- Université Côte d'Azur, INSERM, CNRS, Institut de Biologie Valrose, Nice, France.
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19
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Shen D, Ju L, Zhou F, Yu M, Ma H, Zhang Y, Liu T, Xiao Y, Wang X, Qian K. The inhibitory effect of melatonin on human prostate cancer. Cell Commun Signal 2021; 19:34. [PMID: 33722247 PMCID: PMC7962396 DOI: 10.1186/s12964-021-00723-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/10/2021] [Indexed: 12/15/2022] Open
Abstract
Prostate cancer (PCa) is one of the most commonly diagnosed human cancers in males. Nearly 191,930 new cases and 33,330 new deaths of PCa are estimated in 2020. Androgen and androgen receptor pathways played essential roles in the pathogenesis of PCa. Androgen depletion therapy is the most used therapies for primary PCa patients. However, due to the high relapse and mortality of PCa, developing novel noninvasive therapies have become the focus of research. Melatonin is an indole-like neurohormone mainly produced in the human pineal gland with a prominent anti-oxidant property. The anti-tumor ability of melatonin has been substantially confirmed and several related articles have also reported the inhibitory effect of melatonin on PCa, while reviews of this inhibitory effect of melatonin on PCa in recent 10 years are absent. Therefore, we systematically discuss the relationship between melatonin disruption and the risk of PCa, the mechanism of how melatonin inhibited PCa, and the synergistic benefits of melatonin and other drugs to summarize current understandings about the function of melatonin in suppressing human prostate cancer. We also raise several unsolved issues that need to be resolved to translate currently non-clinical trials of melatonin for clinic use. We hope this literature review could provide a solid theoretical basis for the future utilization of melatonin in preventing, diagnosing and treating human prostate cancer. Video abstract
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Affiliation(s)
- Dexin Shen
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Lingao Ju
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China.,Human Genetics Resource Preservation Center of Hubei Province, Wuhan, China.,Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China
| | - Fenfang Zhou
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Mengxue Yu
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China.,Human Genetics Resource Preservation Center of Hubei Province, Wuhan, China.,Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China
| | - Haoli Ma
- Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China.,Cancer Precision Diagnosis and Treatment and Translational Medicine, Hubei Engineering Research Center, Wuhan, China.,Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yi Zhang
- Center for Life Sciences, Peking University, Beijing, China.,Peking-Tsinghua Center of Life Sciences, Beijing, China.,Euler Technology, ZGC Life Sciences Park, Beijing, China
| | - Tongzu Liu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China
| | - Yu Xiao
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China. .,Human Genetics Resource Preservation Center of Hubei Province, Wuhan, China. .,Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China.
| | - Xinghuan Wang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China. .,Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China. .,Medical Research Institute, Wuhan University, Wuhan, China.
| | - Kaiyu Qian
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China. .,Human Genetics Resource Preservation Center of Hubei Province, Wuhan, China. .,Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, China.
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Menad R, Fernini M, Lakabi L, Smaï S, Gernigon-Spychalowicz T, Farida K, Bonnet X, Moudilou E, Exbrayat JM. Androgen and estrogen receptors immunolocalization in the sand rat (Psammomys Obesus) cauda epididymis. Acta Histochem 2021; 123:151683. [PMID: 33508524 DOI: 10.1016/j.acthis.2021.151683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 01/15/2021] [Accepted: 01/17/2021] [Indexed: 12/06/2022]
Abstract
Both androgens and estrogens play key, albeit incompletely described, roles in the functioning of the epididymis. Because this tightly-coiled tubular structure is compartmented, precise mapping of the distribution of sex steroid's receptors is important. Such receptors have been located in the first segments (caput, corpus), but the last part (cauda) remains poorly explored. We used immunochemistry to localize androgen (AR) and estrogen (ESR1 and ESR2) receptors in the cauda in the fat sand rat (Psammomys obesus). We compared results obtained during the breeding versus resting seasons. We also used individuals castrated, or castrated then treated with testosterone, or subjected to the ligation of their efferent ducts. During the breeding season, in principal cells, we found strong staining both for AR and ESR1 in the apical cytoplasm, and strong staining for ESR2 in the nucleus. During the resting season, principal cells were positive for AR and ESR1, but negative for ESR2. In castrated animals, staining was null for ESR2 and AR, and weak for ESR1. In castrated then treated animals, immuno-expression was restored but only for AR and ESR1. Following efferent duct ligation, AR reactivity decreased while ESR1 and ESR2 provided strong staining. Broadly similar, but not fully identical patterns were observed in basal cells. They were positive for ESR2 and AR during the breeding season, but not for ESR1. During the resting season, staining was modest for ESR1 and AR and negative for ESR2. In all experimentally treated animals, we observed weak staining for AR and ESR1, and a lack of signal for ESR2. Overall, this study provides strong evidence that androgens and estrogens are involved in the seasonal regulation of the whole epididymis in the fat sand rat, with marked differences between caput and cauda (the corpus is highly reduced in rodent).
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Gannon AL, O’Hara L, Mason IJ, Jørgensen A, Frederiksen H, Curley M, Milne L, Smith S, Mitchell RT, Smith LB. Androgen Receptor Is Dispensable for X-Zone Regression in the Female Adrenal but Regulates Post-Partum Corticosterone Levels and Protects Cortex Integrity. Front Endocrinol (Lausanne) 2021; 11:599869. [PMID: 33584538 PMCID: PMC7873917 DOI: 10.3389/fendo.2020.599869] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/24/2020] [Indexed: 01/11/2023] Open
Abstract
Adrenal androgens are fundamental mediators of ovarian folliculogenesis, embryonic implantation, and breast development. Although adrenal androgen function in target tissues are well characterized, there is little research covering the role of androgen-signaling within the adrenal itself. Adrenal glands express AR which is essential for the regression of the X-zone in male mice. Female mice also undergo X-zone regression during their first pregnancy, however whether this is also controlled by AR signaling is unknown. To understand the role of the androgen receptor (AR) in the female adrenal, we utilized a Cyp11a1-Cre to specifically ablate AR from the mouse adrenal cortex. Results show that AR-signaling is dispensable for adrenal gland development in females, and for X-zone regression during pregnancy, but is required to suppress elevation of corticosterone levels post-partum. Additionally, following disruption to adrenal AR, aberrant spindle cell development is observed in young adult females. These results demonstrate sexually dimorphic regulation of the adrenal X-zone by AR and point to dysfunctional adrenal androgen signaling as a possible mechanism in the early development of adrenal spindle cell hyperplasia.
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Affiliation(s)
- Anne-Louise Gannon
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
- School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW, Australia
| | - Laura O’Hara
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
- Centre for Discovery Brain Sciences, Hugh Robson Building, George Square, Edinburgh, United Kingdom
| | - Ian J. Mason
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
| | - Anne Jørgensen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, Copenhagen, Denmark
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, Copenhagen, Denmark
| | - Michael Curley
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
| | - Laura Milne
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
| | - Sarah Smith
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
| | - Rod T. Mitchell
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
| | - Lee B. Smith
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen’s Medical Research Institute, Edinburgh, United Kingdom
- School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW, Australia
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Adult Neural Plasticity in Naked Mole-Rats: Implications of Fossoriality, Longevity and Sociality on the Brain's Capacity for Change. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1319:105-135. [PMID: 34424514 DOI: 10.1007/978-3-030-65943-1_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Naked mole-rats (Heterocephalus glaber) are small African rodents that have many unique behavioral and physiological adaptations well-suited for testing hypotheses about mammalian neural plasticity. In this chapter, we focus on three features of naked mole-rat biology and how they impact neural plasticity in this species: (1) their fossorial lifestyle, (2) their extreme longevity with a lack of demonstrable senescence, and (3) their unusual social structure. Critically, each of these features requires some degree of biological flexibility. First, their fossorial habitat situates them in an environment with characteristics to which the central nervous system is particularly sensitive (e.g., oxygen content, photoperiod, spatial complexity). Second, their long lifespan requires adaptations to combat senescence and declines in neural functioning. Finally, their extreme reproductive skew and sustained ability for release from reproductive suppression indicates remarkable neural sensitivity to the sociosexual environment that is distinct from chronological age. These three features of naked mole-rat life are not mutually exclusive, but they do each offer unique considerations for the possibilities, constraints, and mechanisms associated with adult neural plasticity.
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Dudek KA, Dion‐Albert L, Kaufmann FN, Tuck E, Lebel M, Menard C. Neurobiology of resilience in depression: immune and vascular insights from human and animal studies. Eur J Neurosci 2021; 53:183-221. [PMID: 31421056 PMCID: PMC7891571 DOI: 10.1111/ejn.14547] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/22/2019] [Accepted: 08/12/2019] [Indexed: 12/12/2022]
Abstract
Major depressive disorder (MDD) is a chronic and recurrent psychiatric condition characterized by depressed mood, social isolation and anhedonia. It will affect 20% of individuals with considerable economic impacts. Unfortunately, 30-50% of depressed individuals are resistant to current antidepressant treatments. MDD is twice as prevalent in women and associated symptoms are different. Depression's main environmental risk factor is chronic stress, and women report higher levels of stress in daily life. However, not every stressed individual becomes depressed, highlighting the need to identify biological determinants of stress vulnerability but also resilience. Based on a reverse translational approach, rodent models of depression were developed to study the mechanisms underlying susceptibility vs resilience. Indeed, a subpopulation of animals can display coping mechanisms and a set of biological alterations leading to stress resilience. The aetiology of MDD is multifactorial and involves several physiological systems. Exacerbation of endocrine and immune responses from both innate and adaptive systems are observed in depressed individuals and mice exhibiting depression-like behaviours. Increasing attention has been given to neurovascular health since higher prevalence of cardiovascular diseases is found in MDD patients and inflammatory conditions are associated with depression, treatment resistance and relapse. Here, we provide an overview of endocrine, immune and vascular changes associated with stress vulnerability vs. resilience in rodents and when available, in humans. Lack of treatment efficacy suggests that neuron-centric treatments do not address important causal biological factors and better understanding of stress-induced adaptations, including sex differences, could contribute to develop novel therapeutic strategies including personalized medicine approaches.
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Affiliation(s)
- Katarzyna A. Dudek
- Department of Psychiatry and NeuroscienceFaculty of Medicine and CERVO Brain Research CenterUniversité LavalQuebec CityQCCanada
| | - Laurence Dion‐Albert
- Department of Psychiatry and NeuroscienceFaculty of Medicine and CERVO Brain Research CenterUniversité LavalQuebec CityQCCanada
| | - Fernanda Neutzling Kaufmann
- Department of Psychiatry and NeuroscienceFaculty of Medicine and CERVO Brain Research CenterUniversité LavalQuebec CityQCCanada
| | - Ellen Tuck
- Smurfit Institute of GeneticsTrinity CollegeDublinIreland
| | - Manon Lebel
- Department of Psychiatry and NeuroscienceFaculty of Medicine and CERVO Brain Research CenterUniversité LavalQuebec CityQCCanada
| | - Caroline Menard
- Department of Psychiatry and NeuroscienceFaculty of Medicine and CERVO Brain Research CenterUniversité LavalQuebec CityQCCanada
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Subhahar MB, Karakka Kal AK, Philip M, K Karatt T, N I, Vazhat RA, M P MA. Detection and identification of ACP-105 and its metabolites in equine urine using LC/MS/MS after oral administration. Drug Test Anal 2020; 13:299-317. [PMID: 32852865 DOI: 10.1002/dta.2918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 07/27/2020] [Accepted: 08/17/2020] [Indexed: 12/17/2022]
Abstract
ACP-105 is a novel nonsteroidal selective androgen receptor modulator (SARM) with a tissue-specific agonist effect and does not have side effects associated with the use of common androgens. This research reports a comprehensive study for the detection of ACP-105 and its metabolites in racehorses after oral administration (in vivo) and postulating its structures using mass spectrometric techniques. To obtain the metabolic profile of ACP-105, a selective and reliable LC-MS/MS method was developed. The chemical structures of the metabolites were determined based on their fragmentation pattern, accurate mass, and retention time. Under the current experimental condition, a total of 19 metabolites were detected in ACP-105 drug administered equine urine samples. The study results suggest the following: (1) ACP-105 is prone to oxidation, which gives corresponding monohydroxylated, dihydroxylated, and trihydroxylated metabolites; (2) along with oxidation, there is a possibility of elimination of water molecule (dehydration) from the third position of the tropine moiety, resulting in the dehydrated analogs of corresponding monohydroxylated, dihydroxylated, and trihydroxylated metabolites; (3) from the study on the metabolites using LC-MS/MS, it is clear that the fragmentation pattern is identical and a great number of fragment ions are common in all the metabolites and the parent drug. (4) The ACP-105 and its metabolites were detected for up to 72 h; thus, the result is a valuable tool for evaluating its use and/or misuse in sport.
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Affiliation(s)
| | | | - Moses Philip
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Tajudheen K Karatt
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Ibrahimwaseem N
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Ramees Abdulla Vazhat
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Muhammed Ajeebsanu M P
- Equine Forensic Unit, Central Veterinary Research Laboratory, Dubai, United Arab Emirates
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25
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Alves ÉR, Ferreira CGM, Silva MVD, Vieira Filho LD, Silva Junior VAD, Melo IMFD, Neto CJCL, Santos LCDS, Teixeira ÁAC, Wanderley Teixeira V. Protective action of melatonin on diabetic rat testis at cellular, hormonal and immunohistochemical levels. Acta Histochem 2020; 122:151559. [PMID: 32622427 DOI: 10.1016/j.acthis.2020.151559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 05/03/2020] [Accepted: 05/03/2020] [Indexed: 12/20/2022]
Abstract
The aim of the present study was to analyze the effects of melatonin treatment on diabetic rat testes. Fifty albino rats were divided into the following groups: CG: control group; GD: placebo-induced and placebo-treated mice; GDI: insulin-induced and post-confirmation diabetes-induced rats; GDM: diabetes-induced and melatonin-treated post-confirmation mice and GDMS: diabetes-induced and melatonin-treated mice simultaneously. Melatonin was administered at a dose of 10 mg/kg in drinking water every day for 20 days at night. Diabetes was induced by streptozotocin (60 mg/kg) and confirmed after the fifth day of induction. Insulin was administered at 5 IU (international units)/day at different times of the day for 20 days. The testes were submitted to histopathological, morphometric, immunohistochemical and oxidative stress analysis. Melatonin moderately decreased glycemic levels, protected weight loss and morphometric changes in the testicles, increased antioxidant enzyme levels and stabilized plasma testosterone and androgen receptor levels and decreased inflammatory markers in the testicles. Showing its potential to mitigate diabetes effects.
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Affiliation(s)
- Érique Ricardo Alves
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil.
| | | | - Maria Vanessa da Silva
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
| | - Leucio Duarte Vieira Filho
- Federal University of Pernambuco, Department of Physiology and Pharmacology, Center for Biological Sciences, Recife Brazil
| | | | | | | | - Laís Caroline da Silva Santos
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
| | - Álvaro Aguiar Coelho Teixeira
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
| | - Valéria Wanderley Teixeira
- Federal Rural University of Pernambuco, Department of Morphology and Animal Physiology, Recife CEP 52171-900, Brazil
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Adrenarcheal Timing Longitudinally Predicts Anxiety Symptoms via Amygdala Connectivity During Emotion Processing. J Am Acad Child Adolesc Psychiatry 2020; 59:739-748.e2. [PMID: 31055054 DOI: 10.1016/j.jaac.2019.04.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 04/11/2019] [Accepted: 04/25/2019] [Indexed: 01/26/2023]
Abstract
OBJECTIVE This study aimed to examine longitudinally whether adrenarcheal timing (adrenarcheal hormone levels independent of age) and tempo (change in hormone levels over time) were associated with amygdala functional connectivity and how this in turn related to anxiety symptoms in the transition from childhood to adolescence. METHOD Participants were 64 children (34 girls) who completed the Spence Children's Anxiety Scale and saliva collections to measure levels of testosterone, dehydroepiandrosterone, and dehydroepiandrosterone sulfate at two time points (mean age 9.5 years at time 1 [T1], 12.2 years at time 2 [T2]). Participants also viewed fearful and calm facial expressions while undergoing functional magnetic resonance imaging scanning at both time points. Amygdala functional connectivity was assessed with psychophysiological interaction analysis and modeled longitudinally with the Multivariate and Repeated Measures MATLAB toolbox. RESULTS Controlling for age, higher dehydroepiandrosterone sulfate at T1 was related to an increase in amygdala to inferior frontal gyrus connectivity over time (T1 to T2) in boys, but the opposite pattern was found in girls. Dehydroepiandrosterone at T1 showed a positive association with amygdala connectivity to several lateral prefrontal areas and the anterior cingulate across time. Higher dehydroepiandrosterone at T1 was indirectly related to more anxiety symptoms at T2, controlling for symptoms at T1, via more positive amygdala to inferior frontal gyrus connectivity. Changes in hormone levels did not relate to changes in amygdala connectivity (from T1 to T2). CONCLUSION The results suggest that amygdala to prefrontal cortex connectivity may be a mechanism through which early adrenarcheal timing predicts the development of anxiety symptoms during adrenarche.
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Jiménez-Rubio G, Herrera-Pérez JJ, Martínez-Becerril HA, Márquez-Baltazar MS, Martínez-Mota L. Age-dependent effects of testosterone on spatial memory in male rats. Horm Behav 2020; 122:104748. [PMID: 32222529 DOI: 10.1016/j.yhbeh.2020.104748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 03/20/2020] [Accepted: 03/22/2020] [Indexed: 11/21/2022]
Abstract
Decreased spatial memory is common in aging populations and reduces their quality of life. Although its role is still controversial, low testosterone (T) may contribute to impaired cognition in aged men. This study aimed to identify the role of T in age-related deficiencies in spatial memory among male rats. Young adult (3 months old) and aged (21 months old) Wistar rats were assigned to independent groups: intact, orchidectomized, or orchidectomized + subcutaneous pellets of T propionate. The phases of spatial memory acquisition (4 daily trials/4 days) and spatial memory retention (1 trial/day, 3 and 12 days after acquisition) were evaluated using the Barnes maze. Compared with young adults, aged intact rats took longer to find the goal, made more mistakes, and showed only slight improvements in goal sector exploration across the acquisition period. The young orchidectomized rats showed no improvement in performance over the days during the acquisition phase. T treatment in hormonally deprived old rats produced a small improvement in goal sector exploration and number of errors during the acquisition phase. Meanwhile, in young adults, this treatment improved the goal sector searching in the retention phase (12 days after acquisition training). Our results suggested that age-related spatial memory deficits cannot be entirely explained by the decline in T levels; however, this androgen produced subtle and mild beneficial effects on spatial memory in young and old males. Taken together, our findings suggest age differences in the role of T on spatial memory in males.
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Affiliation(s)
- Graciela Jiménez-Rubio
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco 101, Col. San Lorenzo Huipulco, Delegación Tlalpan, 14370 Ciudad de México, Mexico
| | - José Jaime Herrera-Pérez
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco 101, Col. San Lorenzo Huipulco, Delegación Tlalpan, 14370 Ciudad de México, Mexico
| | - Hilda Angélica Martínez-Becerril
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco 101, Col. San Lorenzo Huipulco, Delegación Tlalpan, 14370 Ciudad de México, Mexico
| | - Martín Sergio Márquez-Baltazar
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco 101, Col. San Lorenzo Huipulco, Delegación Tlalpan, 14370 Ciudad de México, Mexico
| | - Lucía Martínez-Mota
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco 101, Col. San Lorenzo Huipulco, Delegación Tlalpan, 14370 Ciudad de México, Mexico.
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28
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Islam MN, Sakimoto Y, Jahan MR, Ishida M, Tarif AMM, Nozaki K, Masumoto KH, Yanai A, Mitsushima D, Shinoda K. Androgen Affects the Dynamics of Intrinsic Plasticity of Pyramidal Neurons in the CA1 Hippocampal Subfield in Adolescent Male Rats. Neuroscience 2020; 440:15-29. [PMID: 32450298 DOI: 10.1016/j.neuroscience.2020.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 12/18/2022]
Abstract
Androgen receptor (AR) is abundantly expressed in the preoptico-hypothalamic area, bed nucleus of stria terminalis, and medial amygdala of the brain where androgen plays an important role in regulating male sociosexual, emotional and aggressive behaviors. In addition to these brain regions, AR is also highly expressed in the hippocampus, suggesting that the hippocampus is another major target of androgenic modulation. It is known that androgen can modulate synaptic plasticity in the CA1 hippocampal subfield. However, to date, the effects of androgen on the intrinsic plasticity of hippocampal neurons have not been clearly elucidated. In this study, the effects of androgen on the expression of AR in the hippocampus and on the dynamics of intrinsic plasticity of CA1 pyramidal neurons were examined using immunohistochemistry, Western blotting and whole-cell current-clamp recording in unoperated, sham-operated, orchiectomized (OCX), OCX + testosterone (T) or OCX + dihydrotestosterone (DHT)-primed adolescent male rats. Orchiectomy significantly decreased AR-immunoreactivity, resting membrane potential, action potential numbers, afterhyperpolarization amplitude and membrane resistance, whereas it significantly increased action potential threshold and membrane capacitance. These effects were successfully reversed by treatment with either aromatizable androgen T or non-aromatizable androgen DHT. Furthermore, administration of the AR-antagonist flutamide in intact rats showed similar changes to those in OCX rats, suggesting that androgens affect the excitability of CA1 pyramidal neurons possibly by acting on the AR. Our current study potentially clarifies the role of androgen in enhancing the basal excitability of the CA1 pyramidal neurons, which may influence selective neuronal excitation/activation to modulate certain hippocampal functions.
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Affiliation(s)
- Md Nabiul Islam
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Yuya Sakimoto
- Department of Physiology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Mir Rubayet Jahan
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan; Department of Anatomy and Histology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Mako Ishida
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Abu Md Mamun Tarif
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Kanako Nozaki
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Koh-Hei Masumoto
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Akie Yanai
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan; Department of Basic Laboratory Sciences, Faculty of Medicine and Health Sciences, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Dai Mitsushima
- Department of Physiology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan
| | - Koh Shinoda
- Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan.
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Low KL, Tomm RJ, Ma C, Tobiansky DJ, Floresco SB, Soma KK. Effects of aging on testosterone and androgen receptors in the mesocorticolimbic system of male rats. Horm Behav 2020; 120:104689. [PMID: 31954104 DOI: 10.1016/j.yhbeh.2020.104689] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 11/23/2019] [Accepted: 01/10/2020] [Indexed: 12/18/2022]
Abstract
As males age, systemic testosterone (T) levels decline. T regulates executive function, a collection of cognitive processes that are mediated by the mesocorticolimbic system. Here, we examined young adult (5 months) and aged (22 months) male Fischer 344 × Brown Norway rats, and measured systemic T levels in serum and local T levels in microdissected nodes of the mesocorticolimbic system (ventral tegmental area (VTA), nucleus accumbens (NAc), medial prefrontal cortex (mPFC), and orbitofrontal cortex (OFC)). We also measured androgen receptor (AR) immunoreactivity (-ir) in the mesocorticolimbic system. As expected, systemic T levels decreased with age. Local T levels in mesocorticolimbic regions - except the VTA - also decreased with age. Mesocorticolimbic T levels were higher than serum T levels at both ages. AR-ir was present in the VTA, NAc, mPFC, and OFC and decreased with age in the mPFC. Taken together with previous results, the data suggest that changes in androgen signaling may contribute to changes in executive function during aging.
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Affiliation(s)
- Katelyn L Low
- Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada; Department of Zoology, University of British Columbia, Vancouver, BC, Canada
| | - Ryan J Tomm
- Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Chunqi Ma
- Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Daniel J Tobiansky
- Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Stan B Floresco
- Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Kiran K Soma
- Department of Psychology and Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada; Department of Zoology, University of British Columbia, Vancouver, BC, Canada.
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Yang R, Browne JA, Eggener SE, Leir SH, Harris A. A novel transcriptional network for the androgen receptor in human epididymis epithelial cells. Mol Hum Reprod 2019; 24:433-443. [PMID: 30016502 DOI: 10.1093/molehr/gay029] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 07/14/2018] [Indexed: 12/31/2022] Open
Abstract
STUDY QUESTION What is the transcriptional network governed by the androgen receptor (AR) in human epididymis epithelial (HEE) cells from the caput region and if the network is tissue-specific, how is this achieved? SUMMARY ANSWER About 200 genes are differentially expressed in the caput HEE cells after AR activation; the AR transcriptional network is tissue-specific and may be mediated in part by distinct AR co-factors including CAAT-enhancer binding protein beta (CEBPB) and runt-related transcription factor 1 (RUNX1). WHAT IS KNOWN ALREADY Little is known about the AR transcriptional program genome wide in HEE cells, nor its co-factors in those cells. AR has been best studied in the prostate gland epithelium and prostate cancer cell lines, due to the important role of this factor in prostate cancer. However AR-associated differentially expressed genes (DEGs) and AR co-factors have not yet been compared between human epididymis and prostate epithelial cells. STUDY DESIGN, SIZE, DURATION Caput HEE cells from two donors were exposed to the synthetic androgen R1881 at 1 nM for 12-16 h after 72 h of hormone starvation. PARTICIPANTS/MATERIALS, SETTING, METHODS Chromatin was prepared from R1881-treated and vehicle control HEE cells. AR-associated chromatin was purified by chromatin immunoprecipitation (ChIP) and AR occupancy genome wide was revealed by deep sequencing (ChIP-seq). Two independent biological replicates were performed. Total RNA was prepared from R1881 and control-treated HEE cells and gene expression profiles were documented by RNA-seq. The interaction of the potential novel AR co-factors CEBPB and RUNX1, identified through in-silico motif analysis of AR ChIP-seq data, was examined by ChIP-qPCR after siRNA-mediated depletion of each co-factor individually or simultaneously. MAIN RESULTS AND THE ROLE OF CHANCE The results identify about 200 genes that are differentially expressed (DEGs) in HEE cells after AR activation. Some of these DEGs show occupancy of AR at their promoters or cis-regulatory elements suggesting direct regulation. However, there is little overlap in AR-associated DEGs between HEE and prostate epithelial cells. Inspection of over-represented motifs in AR ChIP-seq peaks identified CEBPB and RUNX1 as potential co-factors, with no evidence for FOXA1, which is an important co-factor in the prostate epithelium. CEBPB and RUNX1 ChIP-seq in HEE cells showed that both these factors often occupied AR-binding sites, though rarely simultaneously. Further analysis at a single AR-regulated locus (FK506-binding protein 5, FKPB5) suggests that CEBPB may be a co-activator. These data suggest a novel AR transcriptional network governs differentiated functions of the human epididymis epithelium. LARGE SCALE DATA AR ChIP-seq and RNA-seq data are deposited at GEO: GSE109063. LIMITATIONS, REASONS FOR CAUTION There is substantial donor-to-donor variation in primary HEE cells cultures. We applied stringent statistical tests with a false discovery rate (FDR) of 0.1% for ChIP-seq and standard pipelines for RNA-seq so it is possible that we have missed some AR-regulated genes that are important in caput epididymis function. WIDER IMPLICATIONS OF THE FINDINGS Our data suggest that a novel AR transcriptional network governs differentiated functions of the human epididymis epithelium. Since this cell layer has a critical role in normal sperm maturation, the results are of broader significance in understanding the mechanisms underlying the maintenance of fertility in men. STUDY FUNDING/COMPETING INTERESTS This work was funded by the National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Development: R01 HD068901 (PI: Harris). The authors have no competing interests to declare.
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Affiliation(s)
- Rui Yang
- Human Molecular Genetics Program, Lurie Children's Research Center, Chicago, IL, USA.,Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - James A Browne
- Human Molecular Genetics Program, Lurie Children's Research Center, Chicago, IL, USA.,Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Scott E Eggener
- Section of Urology, University of Chicago Medical Center, Chicago, IL, USA
| | - Shih-Hsing Leir
- Human Molecular Genetics Program, Lurie Children's Research Center, Chicago, IL, USA.,Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Ann Harris
- Human Molecular Genetics Program, Lurie Children's Research Center, Chicago, IL, USA.,Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA.,Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA
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Gannon AL, O'Hara L, Mason JI, Jørgensen A, Frederiksen H, Milne L, Smith S, Mitchell RT, Smith LB. Androgen receptor signalling in the male adrenal facilitates X-zone regression, cell turnover and protects against adrenal degeneration during ageing. Sci Rep 2019; 9:10457. [PMID: 31320667 PMCID: PMC6639311 DOI: 10.1038/s41598-019-46049-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 06/20/2019] [Indexed: 11/09/2022] Open
Abstract
Androgens are known to be an essential regulator of male health. Androgen receptor (AR) is widely expressed throughout the adrenal cortex, yet the wider role for androgen signalling in the adrenal remains underexplored. To investigate AR-dependent and AR-independent androgen signalling in the adrenal, we used a novel mouse model with a specific ablation of androgen receptor in the adrenal cortex with or without reduction of circulating androgen levels by castration. Our results describe AR expression in the human and mouse adrenal and highlight that the mouse is a viable model to investigate androgen signalling in the adrenal cortex. We show androgen signalling via AR is required for X-zone regression during puberty. Furthermore, cortex measurements define differences in X-zone morphology depending on whether circulating androgens or AR have been removed. We show androgens promote both cortical cell differentiation and apoptosis but are dispensable for the formation of the definitive cortex. Additionally, investigation of aged mice with AR ablation reveals severe cortex disruption, spindle cell hyperplasia and X-zone expansion. The data described herein demonstrates AR-signalling is required to facilitate X-zone regression, cell clearance and to protect against adrenal degeneration during ageing.
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Affiliation(s)
- Anne-Louise Gannon
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
- School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, 2308, NSW, Australia
| | - Laura O'Hara
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
- Centre for Discovery Brain Sciences, Hugh Robson Building, George Square, Edinburgh, EH8 9XD, UK
| | - J Ian Mason
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Anne Jørgensen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, Copenhagen, Denmark
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, Copenhagen, Denmark
| | - Laura Milne
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
- Edinburgh Genome Foundry, Michael Swann Building, Max Bonn Crescent, Edinburgh, EH9 3BF, UK
| | - Sarah Smith
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Rod T Mitchell
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Lee B Smith
- MRC Centre for Reproductive Health, University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.
- School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, 2308, NSW, Australia.
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32
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van der Toom EE, Axelrod HD, de la Rosette JJ, de Reijke TM, Pienta KJ, Valkenburg KC. Prostate-specific markers to identify rare prostate cancer cells in liquid biopsies. Nat Rev Urol 2019; 16:7-22. [PMID: 30479377 DOI: 10.1038/s41585-018-0119-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Despite improvements in early detection and advances in treatment, patients with prostate cancer continue to die from their disease. Minimal residual disease after primary definitive treatment can lead to relapse and distant metastases, and increasing evidence suggests that circulating tumour cells (CTCs) and bone marrow-derived disseminated tumour cells (BM-DTCs) can offer clinically relevant biological insights into prostate cancer dissemination and metastasis. Using epithelial markers to accurately detect CTCs and BM-DTCs is associated with difficulties, and prostate-specific markers are needed for the detection of these cells using rare cell assays. Putative prostate-specific markers have been identified, and an optimized strategy for staining rare cancer cells from liquid biopsies using these markers is required. The ideal prostate-specific marker will be expressed on every CTC or BM-DTC throughout disease progression (giving high sensitivity) and will not be expressed on non-prostate-cancer cells in the sample (giving high specificity). Some markers might not be specific enough to the prostate to be used as individual markers of prostate cancer cells, whereas others could be truly prostate-specific and would make ideal markers for use in rare cell assays. The goal of future studies is to use sensitive and specific prostate markers to consistently and reliably identify rare cancer cells.
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Affiliation(s)
| | - Haley D Axelrod
- The James Buchanan Brady Urological Institute, Baltimore, MD, USA.,Graduate Program in Cellular and Molecular Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | | | - Kenneth J Pienta
- The James Buchanan Brady Urological Institute, Baltimore, MD, USA
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Barendse MEA, Simmons JG, Byrne ML, Patton G, Mundy L, Olsson CA, Seal ML, Allen NB, Whittle S. Associations between adrenarcheal hormones, amygdala functional connectivity and anxiety symptoms in children. Psychoneuroendocrinology 2018; 97:156-163. [PMID: 30036793 DOI: 10.1016/j.psyneuen.2018.07.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/24/2018] [Accepted: 07/11/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVE The transition from childhood to adolescence is a vulnerable period for the development of anxiety symptoms. There is some evidence that hormonal changes occurring during adrenarche, an early pubertal phase, might play a role in this increased vulnerability. Little is known about underlying brain mechanisms. Given the role of the amygdala-based fear circuit in anxiety, the current study aimed to investigate whether children's adrenarcheal hormone levels were associated with functional connectivity of the amygdala while processing fearful facial expressions, and how this in turn related to anxiety symptoms. METHOD Participants were 83 children (M age 9.53 years) who completed two morning saliva collections to measure levels of dehydroepiandrosterone (DHEA), its sulphate (DHEAS), and testosterone. They also completed the Spence Children's Anxiety Scale (SCAS), and viewed fearful and calm facial expressions while undergoing a functional MRI scan. Psychophysiological interaction (PPI) analyses were performed to examine amygdala connectivity and significant clusters were fed into a bootstrapping mediation model. RESULTS In boys, mediation analyses showed an indirect positive effect of testosterone on anxiety symptoms, which was mediated by amygdala-secondary visual cortex connectivity as well as amygdala-anterior cingulate connectivity. In girls, DHEAS showed a negative indirect association with anxiety symptoms mediated by amygdala connectivity to the fusiform face area and insula. CONCLUSION The results indicate unique roles for adrenarcheal hormones in anxiety and suggest that amygdala connectivity may represent an important neural mechanism in these associations. Importantly, results reveal prominent sex differences in the biological mechanisms associated with anxiety in children undergoing adrenarche.
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Affiliation(s)
- Marjolein E A Barendse
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne and Melbourne Health, Parkville, VIC, Australia.
| | - Julian G Simmons
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne and Melbourne Health, Parkville, VIC, Australia; Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, VIC, Australia
| | | | - George Patton
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia; Centre for Adolescent Health, Murdoch Children's Research Institute, Parkville, VIC, Australia
| | - Lisa Mundy
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia; Centre for Adolescent Health, Murdoch Children's Research Institute, Parkville, VIC, Australia
| | - Craig A Olsson
- Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, VIC, Australia; Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia; Centre for Adolescent Health, Murdoch Children's Research Institute, Parkville, VIC, Australia; Centre for Social and Early Emotional Development, School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Marc L Seal
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia; Developmental Imaging, Murdoch Children's Research Institute, Parkville, VIC, 3052, Australia
| | - Nicholas B Allen
- Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, VIC, Australia; Department of Psychology, University of Oregon, Eugene, OR, USA
| | - Sarah Whittle
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne and Melbourne Health, Parkville, VIC, Australia; Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, VIC, Australia
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Hastings WJ, Chang AM, Ebstein RP, Shalev I. Neuroendocrine stress response is moderated by sex and sex hormone receptor polymorphisms. Horm Behav 2018; 106:74-80. [PMID: 30300610 PMCID: PMC6324727 DOI: 10.1016/j.yhbeh.2018.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 09/28/2018] [Accepted: 10/03/2018] [Indexed: 01/08/2023]
Abstract
Sex hormones are significant regulators of stress reactivity, however, little is known about how genetic variation in hormone receptors contributes to this process. Here we report interactions between biological sex and repeat polymorphisms in genes encoding sex hormone receptors, and their effects on salivary cortisol reactivity in a sample of 100 participants (47 men & 53 women; 24.7 ± 3.23 years). Three genes were investigated: estrogen receptors alpha (ESR1) and beta (ESR2), and the androgen receptor (AR). Participants were classified as carrying 'Short' or 'Long' alleles based on median splits of the repeat distribution for each gene. Measures of physiological reactivity were collected before and after exposure to a canonical laboratory stressor and converted to traditional summary measures for analyses. Overall, men exhibited greater cortisol (p = 0.001) and mean arterial pressure reactivity (p = 0.002), while women displayed elevated heart rate throughout the session (p = 0.02). The effect of polymorphisms on salivary cortisol was sex sensitive. ESR1 was associated with differential reactivity in men (p = 0.04), but not women (p = 0.24). ESR2 genotype interacted with sex such that each additional 'Long' allele was associated with a 6.4% decrease in salivary cortisol in men, but a 9.5% increase in the levels of women (p = 0.02 for interaction). For the X-linked AR, the 'Long' allele was associated with decreased cortisol levels in men (p = 0.047), but in women had no effect (p = 0.75). Together, these results provide evidence for the saliency of genetic variation in sex hormone receptors on stress reactivity in humans and highlight their important role as mediators of hormonal activity.
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Affiliation(s)
- W J Hastings
- Department of Biobehavioral Health, Pennsylvania State University, PA, USA
| | - A M Chang
- Department of Biobehavioral Health, Pennsylvania State University, PA, USA
| | - R P Ebstein
- Department of Psychology, National University of Singapore, Singapore
| | - I Shalev
- Department of Biobehavioral Health, Pennsylvania State University, PA, USA.
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35
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Testosterone-cortisol dissociation in children exposed to prenatal maternal stress, and relationship with aggression: Project Ice Storm. Dev Psychopathol 2018; 30:981-994. [PMID: 30068431 DOI: 10.1017/s0954579418000652] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Prenatal maternal stress (PNMS) has been associated with postnatal behavioral alterations that may be partly explained by interactions between the hypothalamic-pituitary-adrenal (HPA) and hypothalamic-pituitary-gonadal (HPG) axes. Yet it remains unclear whether PNMS leads to enduring HPA-HPG alterations in the offspring, and whether HPA-HPG interactions can impact behavior during development, in particular levels of aggression in childhood. Here we investigated the relationship between a marker for HPG axis function (baseline testosterone) and a marker for HPA axis response (cortisol area under the curve) in 11½-year-olds whose mothers were exposed to the 1998 Quebec ice storm during pregnancy (n = 59 children; 31 boys, 28 girls). We examined (a) whether the degree of objective or subjective PNMS regulates the testosterone-cortisol relationship at age 11½, and (b) whether this testosterone-cortisol relationship is associated with differences in aggressive behavior. We found that, at lower levels of subjective PNMS, baseline testosterone and cortisol reactivity were positively correlated; in contrast, there was no relationship between these hormones at higher levels of subjective PNMS. Cortisol response moderated the relationship between testosterone and aggression. These results support the notion PNMS may explain variance in fetal HPA-HPG interactions, and that these interactions may be associated with aggressive behavior in late childhood.
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36
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Hormonal Regulation of Testicular Development in the Finless Porpoise Neophocaena asiaeorientalis sunameri: Preliminary Evidence from Testicular Histology and Immunohistochemistry. Zool Stud 2018; 57:e41. [PMID: 31966281 DOI: 10.6620/zs.2018.57-41] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 07/26/2018] [Indexed: 11/18/2022]
Abstract
Yang Xiao, Ghulam Nabi, Jiwei Yang, Yujiang Hao, and Ding Wang (2018) Sex hormones play a crucial role in regulating testicular development and maintaining spermatogenesis in the male reproductive system. Knowledge of hormonal regulation in odontocetes is limited to captive species. In this study, the characteristics of hormonal regulation during the testicular development were assessed by histological and immunohistochemical methods in the East Asian finless porpoise (Neophocaena asiaeorientalis sunameri), native to the Chinese Yellow/Bohai Sea coast, China. The testes mass, seminiferous tubule cross section diameter, thickness of the tunica albuginea, and the level of testosterone (T) expression increased abruptly at the age of 3-3.5 years (body length 140-145 cm). However, the estradiol (E2) expression level decreased with age after 3 years. Therefore, we inferred that the male East Asian finless porpoise (EAFP) > 3 years old (body length > 140 cm) could be classified as the age of puberty onset. Immuno-localization with T was only observed in the interstitial fluid of all animals at all ages. In contrast, a positive reaction for E2 and its receptor could be observed in the Leydig, myoid, Sertoli, and germ cells at different developmental stages. T is presumed to maintain the tubular microenvironment for spermatogenesis while E2 may directly regulate spermatogenesis at the level of germ cells. Our findings provide useful information for understanding reproductive status and hormonal regulation in the male EAFP.
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37
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Hejmej A, Bilinska B. The effects of flutamide on cell-cell junctions in the testis, epididymis, and prostate. Reprod Toxicol 2018; 81:1-16. [PMID: 29958919 DOI: 10.1016/j.reprotox.2018.06.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/15/2018] [Accepted: 06/20/2018] [Indexed: 12/12/2022]
Abstract
In this review, we summarize recent findings on the effect of the anti-androgen flutamide on cell-cell junctions in the male reproductive system. We outline developmental aspects of flutamide action on the testis, epididymis, and prostate, and describe changes in junction protein expression and organization of junctional complexes in the adult boar following prenatal and postnatal exposure. We also discuss findings on the mechanisms by which flutamide induces alterations in cell-cell junctions in reproductive tissues of adult males, with special emphasis on cytoplasmic effects. Based on the results from in vivo and in vitro studies in the rat, we propose that flutamide affects the expression of junction proteins and junction complex structure not only by inhibiting androgen receptor activity, but equally important by modulating protein kinase-dependent signaling in testicular cells. Additionally, results from studies on prostate cancer cell lines point to a role for the cellular molecular outfit in response to flutamide.
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Affiliation(s)
- Anna Hejmej
- Department of Endocrinology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland
| | - Barbara Bilinska
- Department of Endocrinology, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland.
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38
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Yang L, Comninos AN, Dhillo WS. Intrinsic links among sex, emotion, and reproduction. Cell Mol Life Sci 2018; 75:2197-2210. [PMID: 29619543 PMCID: PMC5948280 DOI: 10.1007/s00018-018-2802-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/27/2018] [Accepted: 03/20/2018] [Indexed: 01/23/2023]
Abstract
Species survival is dependent on successful reproduction. This begins with a desire to mate, followed by selection of a partner, copulation and in monogamous mammals including humans, requires emotions and behaviours necessary to maintain partner bonds for the benefit of rearing young. Hormones are integral to all of these stages and not only mediate physiological and endocrine processes involved in reproduction, but also act as neuromodulators within limbic brain centres to facilitate the expression of innate emotions and behaviours required for reproduction. A significant body of work is unravelling the roles of several key hormones in the modulation of mood states and sexual behaviours; however, a full understanding of the integration of these intrinsic links among sexual and emotional brain circuits still eludes us. This review summarises the evidence to date and postulates future directions to identify potential psycho-neuroendocrine frameworks linking sexual and emotional brain processes with reproduction.
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Affiliation(s)
- Lisa Yang
- Section of Endocrinology and Investigative Medicine, Imperial College London, 6th Floor, Commonwealth Building, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
| | - Alexander N Comninos
- Section of Endocrinology and Investigative Medicine, Imperial College London, 6th Floor, Commonwealth Building, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK
- Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
| | - Waljit S Dhillo
- Section of Endocrinology and Investigative Medicine, Imperial College London, 6th Floor, Commonwealth Building, Hammersmith Hospital Campus, Du Cane Road, London, W12 ONN, UK.
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Babstock DM, Walling SG, Harley CW, Malsbury CW. Androgen receptor ontogeny in the dorsal hippocampus of male and female rats. Horm Behav 2018. [PMID: 29534889 DOI: 10.1016/j.yhbeh.2018.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- D M Babstock
- Psychology Department, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X9, Canada
| | - S G Walling
- Psychology Department, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X9, Canada
| | - C W Harley
- Psychology Department, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X9, Canada.
| | - C W Malsbury
- Psychology Department, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X9, Canada
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Akinola OB, Gabriel MO. Neuroanatomical and molecular correlates of cognitive and behavioural outcomes in hypogonadal males. Metab Brain Dis 2018; 33:491-505. [PMID: 29230619 DOI: 10.1007/s11011-017-0163-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/28/2017] [Indexed: 12/18/2022]
Abstract
Robust epidemiological, clinical and laboratory evidence supports emerging roles for the sex steroids in such domains as neurodevelopment, behaviour, learning and cognition. Regions of the mammalian brain that are involved in cognitive development and memory do not only express the classical nuclear androgen receptor, but also the non-genomic membrane receptor, which is a G protein-coupled receptor that mediates some rapid effects of the androgens on neurogenesis and synaptic plasticity. Under physiological conditions, hippocampal neurons do express the enzyme aromatase, and therefore actively aromatize testosterone to oestradiol. Although glial expression of the aromatase enzyme is minimal, increased expression following injury suggests a role for sex steroids in neuroprotection. It is therefore plausible to deduce that low levels of circulating androgens in males would perturb neuronal functions in relation to cognition and memory, as well as neural repair following injury. The present review is an overview of some roles of the sex steroids on cognitive function in males, and the neuroanatomical and molecular underpinnings of some behavioural and cognitive deficits characteristic of such genetic disorders noted for low androgen levels, including Klinefelter syndrome, Bardet-Biedl syndrome, Kallman syndrome and Prader-Willi syndrome. Recent literature in relation to some behavioural and cognitive changes secondary to surgical and pharmacological castration are also appraised.
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Affiliation(s)
- O B Akinola
- Division of Endocrinology, Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Ilorin, Ilorin, Nigeria.
| | - M O Gabriel
- Division of Endocrinology, Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Ilorin, Ilorin, Nigeria
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Effects of maternal dietary selenium (Se-enriched yeast) on testis development, testosterone level and testicular steroidogenesis-related gene expression of their male kids in Taihang Black Goats. Theriogenology 2018; 114:95-102. [PMID: 29605576 DOI: 10.1016/j.theriogenology.2018.03.035] [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] [Received: 09/11/2017] [Revised: 03/20/2018] [Accepted: 03/20/2018] [Indexed: 11/24/2022]
Abstract
To investigate the effects of maternal dietary selenium (Se-enriched yeast) on testis development, testosterone level and steroidogenesis-related gene expression in testis of their male kids, selected pregnant Taihang Black Goats were randomly allotted to four treatment groups. They were fed the basal gestation and lactation diets supplemented with 0 (control), 0.5, 2.0 and 4.0 mg of Se/kg DM. Thirty days after weaning, testes were collected from the kids. After the morphological development status of testis was examined, tissue samples were collected for analyzing testosterone concentration and histological parameters. Testosterone synthesis-related genes were detected using real-time PCR. Localization and quantification of androgen receptor (AR) in testis of goats were determined by immunohistochemical and western blot analysis. The results show that Se supplementation in the diet of dams led to higher (p < 0.05) testicular weight, volume, length, width, transverse and vertical grith of their male kids. Excessive Se (4.0 mg/kg) can inhibit the development of testis by decreasing testicular weight and volume. The density of spermatogenic cells and Leydig cells in the Se treatment groups was significantly (p < 0.05) higher than that in the control. Maternal dietary Se did not affect the thickness of testes, thickness of germinal epithelium and diameter of seminiferous tubule. Se supplemented in the diet of dams improved the testosterone level in testis tissue and serum, and promote the expression of testosterone-related genes. The mRNA expression of StAR, 3β-HSD and CYP11A1 was decreased with the increasing dietary Se levels of dams. Maternal dietary Se can improve the AR protein abundance in testis of their offspring. AR immunopositive product was detected in Leydig cells, peritubular myoid cells, perivascular smooth muscle cells, primary spermatocytes and spermatids. The expression of AR in spermatogenetic cells is stage specific. This study suggests that maternal dietary Se can influence the testis development and spermatogenesis of their male kids by modulating testosterone synthesis in goats. More attention should be given to the potential role of maternal nutrition in improving reproductive performance of their offspring.
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Ooishi Y. Correlation Between Resting Testosterone/Cortisol Ratio and Sound-Induced Vasoconstriction at Fingertip in Men. Front Physiol 2018; 9:164. [PMID: 29559922 PMCID: PMC5845581 DOI: 10.3389/fphys.2018.00164] [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: 12/01/2017] [Accepted: 02/19/2018] [Indexed: 11/13/2022] Open
Abstract
A sound-induced sympathetic tone has been used as an index for orienting responses to auditory stimuli. The resting testosterone/cortisol ratio is a biomarker of social aggression that drives an approaching behavior in response to environmental stimuli, and a higher testosterone level and a lower cortisol level can facilitate the sympathetic response to environmental stimuli. Therefore, it is possible that the testosterone/cortisol ratio is correlated with the sound-induced sympathetic tone. The current study investigated the relationship between the resting testosterone/cortisol ratio and vasoconstriction induced by listening to sound stimuli. Twenty healthy males aged 29.0 ± 0.53 years (mean ± S.E.M) participated in the study. They came to the laboratory for 3 days and listened to one of three types of sound stimuli for 1 min on each day. Saliva samples were collected for an analysis of salivary testosterone and cortisol levels on the day of each experiment. After the collecting the saliva sample, we measured the blood volume pulse (BVP) amplitude at a fingertip. Since vasoconstriction is mediated by the activation of the sympathetic nerves, the strength of the reduction in BVP amplitude at a fingertip was called the BVP response (finger BVPR). No difference was observed between the sound-induced finger BVPR for the three types of sound stimuli (p = 0.779). The correlation coefficient between the sound-induced finger BVPR and the salivary testosterone/cortisol ratio within participants was significantly different from no correlation (p = 0.011) and there was a trend toward a significance in the correlation between the sound-induced finger BVPR and the salivary testosterone/cortisol ratio between participants (r = 0.39, p = 0.088). These results suggest that the testosterone/cortisol ratio affects the difference in the sound-evoked sympathetic response.
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Affiliation(s)
- Yuuki Ooishi
- NTT Communication Science Laboratories, NTT Corporation, Atsugi, Japan
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Jiang Z, Zhou B, Li X, Kirby GM, Zhang X. Echinacoside Increases Sperm Quantity in Rats by Targeting the Hypothalamic Androgen Receptor. Sci Rep 2018; 8:3839. [PMID: 29497114 PMCID: PMC5832853 DOI: 10.1038/s41598-018-22211-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 02/19/2018] [Indexed: 01/11/2023] Open
Abstract
Male infertility is a major health issue with an estimated prevalence of 4.2% of male infertility worldwide. Our early work demonstrated that Cistanche extracts protect against sperm damage in mice and that echinacoside (ECH) is one of the major active components. Here we report an essential role for ECH, a natural product that reverses or protects against oligoasthenospermia in rats. ECH was assayed by HPLC, the quantity and quality of sperm was evaluated and hormone levels were determined by radioimmunosorbent assay. ECH reduced levels of androgen receptor (AR) and key steroidogenic-related genes as determined by Western blot and qPCR analysis. The interaction between ECH and AR were evaluated by indirect ELISA and molecular docking. The results show that ECH combined with hypothalamic AR in the pocket of Met-894 and Val-713 to inhibit transfer of AR from the cytoplasm to nuclei in the hypothalamus. While negative feedback of sex hormone regulation was inhibited, positive feedback was stimulated to increase the secretion of luteinizing hormone and testosterone subsequently enhancing the quantity of sperm. Taken together, these data demonstrate that ECH blocks AR activity in the hypothalamus to increase the quantity of sperm and protect against oligoasthenospermia in rats.
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Affiliation(s)
- Zhihui Jiang
- Research Center of Modern Biotechnology, School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, 455000, China.,College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Bo Zhou
- College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Xinping Li
- College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Gordon M Kirby
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Xiaoying Zhang
- Research Center of Modern Biotechnology, School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, 455000, China. .,College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China.
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Diotel N, Charlier TD, Lefebvre d'Hellencourt C, Couret D, Trudeau VL, Nicolau JC, Meilhac O, Kah O, Pellegrini E. Steroid Transport, Local Synthesis, and Signaling within the Brain: Roles in Neurogenesis, Neuroprotection, and Sexual Behaviors. Front Neurosci 2018; 12:84. [PMID: 29515356 PMCID: PMC5826223 DOI: 10.3389/fnins.2018.00084] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/02/2018] [Indexed: 01/18/2023] Open
Abstract
Sex steroid hormones are synthesized from cholesterol and exert pleiotropic effects notably in the central nervous system. Pioneering studies from Baulieu and colleagues have suggested that steroids are also locally-synthesized in the brain. Such steroids, called neurosteroids, can rapidly modulate neuronal excitability and functions, brain plasticity, and behavior. Accumulating data obtained on a wide variety of species demonstrate that neurosteroidogenesis is an evolutionary conserved feature across fish, birds, and mammals. In this review, we will first document neurosteroidogenesis and steroid signaling for estrogens, progestagens, and androgens in the brain of teleost fish, birds, and mammals. We will next consider the effects of sex steroids in homeostatic and regenerative neurogenesis, in neuroprotection, and in sexual behaviors. In a last part, we will discuss the transport of steroids and lipoproteins from the periphery within the brain (and vice-versa) and document their effects on the blood-brain barrier (BBB) permeability and on neuroprotection. We will emphasize the potential interaction between lipoproteins and sex steroids, addressing the beneficial effects of steroids and lipoproteins, particularly HDL-cholesterol, against the breakdown of the BBB reported to occur during brain ischemic stroke. We will consequently highlight the potential anti-inflammatory, anti-oxidant, and neuroprotective properties of sex steroid and lipoproteins, these latest improving cholesterol and steroid ester transport within the brain after insults.
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Affiliation(s)
- Nicolas Diotel
- Université de La Réunion, Institut National de la Santé et de la Recherche Médicale, UMR 1188, Diabète athérothrombose Thérapies Réunion Océan Indien, Saint-Denis de La Réunion, France
| | - Thierry D. Charlier
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Christian Lefebvre d'Hellencourt
- Université de La Réunion, Institut National de la Santé et de la Recherche Médicale, UMR 1188, Diabète athérothrombose Thérapies Réunion Océan Indien, Saint-Denis de La Réunion, France
| | - David Couret
- Université de La Réunion, Institut National de la Santé et de la Recherche Médicale, UMR 1188, Diabète athérothrombose Thérapies Réunion Océan Indien, Saint-Denis de La Réunion, France
- CHU de La Réunion, Saint-Denis, France
| | | | - Joel C. Nicolau
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Olivier Meilhac
- Université de La Réunion, Institut National de la Santé et de la Recherche Médicale, UMR 1188, Diabète athérothrombose Thérapies Réunion Océan Indien, Saint-Denis de La Réunion, France
- CHU de La Réunion, Saint-Denis, France
| | - Olivier Kah
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Elisabeth Pellegrini
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
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Walters KA, Edwards MC, Tesic D, Caldwell ASL, Jimenez M, Smith JT, Handelsman DJ. The Role of Central Androgen Receptor Actions in Regulating the Hypothalamic-Pituitary-Ovarian Axis. Neuroendocrinology 2018; 106:389-400. [PMID: 29635226 DOI: 10.1159/000487762] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 02/16/2018] [Indexed: 12/20/2022]
Abstract
The androgen receptor (AR) is expressed throughout the hypothalamic-pituitary-gonadal (HPG) axis, and findings from female global AR knockout mice confirm that AR-mediated androgen actions play important roles in regulating female reproductive function. We generated neuron-specific AR knockout mice (NeurARKO) to investigate the functional role of neuronal AR-mediated androgen action in regulating the female HPG axis and fertility. Relative to control females, NeurARKO females exhibited elevated luteinizing hormone (LH) levels at diestrus (p < 0.05) and a compromised serum LH response to ovariectomy and E2 priming (p < 0.01). Furthermore, NeurARKO females displayed reduced Kiss1 mRNA expression in the anteroventral periventricular nucleus at diestrus (p < 0.05) and proestrus (p < 0.05), but elevated Kiss1 (p < 0.05) and neurokinin B (Tac2, p < 0.05) mRNA expression in the arcuate nucleus at proestrus compared to WT controls. Ovarian follicle dynamics were also altered in NeurARKO ovaries at 3 months of age, with a significant reduction in large antral follicle numbers at the proestrus stage compared to control WT ovaries (p < 0.05). Increased follicular atresia was evident in NeurARKO ovaries with a 4-fold increase in unhealthy large preantral follicles (p < 0.01). Despite the findings of aberrant neuroendocrine and ovarian characteristics in the NeurARKO females, estrous cyclicity and overall fertility were comparable between NeurARKO and WT females. In conclusion, our findings revealed that selective loss of neuronal AR actions impacts the kisspeptin/GnRH/LH cascade leading to compromised ovarian follicle dynamics.
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Affiliation(s)
- Kirsty A Walters
- School of Women's & Children's Health, University of New South Wales, Sydney, New South Wales, Australia
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Melissa C Edwards
- School of Women's & Children's Health, University of New South Wales, Sydney, New South Wales, Australia
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Dijana Tesic
- School of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Washington, Australia
| | - Aimee S L Caldwell
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Mark Jimenez
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Jeremy T Smith
- School of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Washington, Australia
| | - David J Handelsman
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Sydney, New South Wales, Australia
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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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Presence of Androgen Receptor Variant in Neuronal Lipid Rafts. eNeuro 2017; 4:eN-NWR-0109-17. [PMID: 28856243 PMCID: PMC5575139 DOI: 10.1523/eneuro.0109-17.2017] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 08/03/2017] [Accepted: 08/14/2017] [Indexed: 11/21/2022] Open
Abstract
Fast, nongenomic androgen actions have been described in various cell types, including neurons. However, the receptor mediating this cell membrane–initiated rapid signaling remains unknown. This study found a putative androgen receptor splice variant in a dopaminergic N27 cell line and in several brain regions (substantia nigra pars compacta, entorhinal cortex, and hippocampus) from gonadally intact and gonadectomized (young and middle-aged) male rats. This putative splice variant protein has a molecular weight of 45 kDa and lacks an N-terminal domain, indicating it is homologous to the human AR45 splice variant. Interestingly, AR45 was highly expressed in all brain regions examined. In dopaminergic neurons, AR45 is localized to plasma membrane lipid rafts, a microdomain involved in cellular signaling. Further, AR45 protein interacts with membrane-associated G proteins Gαq and Gαo. Neither age nor hormone levels altered AR45 expression in dopaminergic neurons. These results provide the first evidence of AR45 protein expression in the brain, specifically plasma membrane lipid rafts. AR45 presence in lipid rafts indicates that it may function as a membrane androgen receptor to mediate fast, nongenomic androgen actions.
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Iamsaard S, Sukhorum W, Arun S, Phunchago N, Uabundit N, Boonruangsri P, Namking M. Valproic acid induces histologic changes and decreases androgen receptor levels of testis and epididymis in rats. Int J Reprod Biomed 2017. [DOI: 10.29252/ijrm.15.4.217] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Low KL, Ma C, Soma KK. Tyramide Signal Amplification Permits Immunohistochemical Analyses of Androgen Receptors in the Rat Prefrontal Cortex. J Histochem Cytochem 2017; 65:295-308. [PMID: 28438093 PMCID: PMC5407533 DOI: 10.1369/0022155417694870] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 01/24/2017] [Indexed: 11/22/2022] Open
Abstract
Research on neural androgen receptors (ARs) has traditionally focused on brain regions that regulate reproductive and aggressive behaviors, such as the hypothalamus and amygdala. Although many cells in the prefrontal cortex (PFC) also express ARs, the number of ARs per cell appears to be much lower, and thus, AR immunostaining is often hard to detect and quantify in the PFC. Here, we demonstrate that biotin tyramide signal amplification (TSA) dramatically increases AR immunoreactivity in the rat brain, including critical regions of the PFC such as the medial PFC (mPFC) and orbitofrontal cortex (OFC). We show that TSA is useful for AR detection with both chromogenic and immunofluorescent immunohistochemistry. Double-labeling studies reveal that AR+ cells in the PFC and hippocampus are NeuN+ but not GFAP+ and thus primarily neuronal. Finally, in gonadally intact rats, more AR+ cells are present in the mPFC and OFC of males than of females. Future studies can use TSA to further examine AR immunoreactivity across ages, sexes, strains, and different procedures (e.g., fixation methods). In light of emerging evidence for the androgen regulation of executive function and working memory, these results may help understand the distribution and roles of ARs in the PFC.
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Affiliation(s)
- Katelyn L. Low
- Department of Psychology and The Djavad Mowafaghian Centre for Brain Health (KLL, CM, KKS), The University of British Columbia, Vancouver, British Columbia, Canada
- Department of Zoology (KLL, KKS), The University of British Columbia, Vancouver, British Columbia, Canada
| | - Chunqi Ma
- Department of Psychology and The Djavad Mowafaghian Centre for Brain Health (KLL, CM, KKS), The University of British Columbia, Vancouver, British Columbia, Canada
- Department of Zoology (KLL, KKS), The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kiran K. Soma
- Kiran K. Soma, Department of Psychology, University of British Columbia, 2136 West Mall, Vancouver, British Columbia, Canada V6T 1Z4.E-mail:
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Potter SJ, DeFalco T. Role of the testis interstitial compartment in spermatogonial stem cell function. Reproduction 2017; 153:R151-R162. [PMID: 28115580 DOI: 10.1530/rep-16-0588] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/22/2016] [Accepted: 01/23/2017] [Indexed: 01/15/2023]
Abstract
Intricate cellular and molecular interactions ensure that spermatogonial stem cells (SSCs) proceed in a step-wise differentiation process through spermatogenesis and spermiogenesis to produce sperm. SSCs lie within the seminiferous tubule compartment, which provides a nurturing environment for the development of sperm. Cells outside of the tubules, such as interstitial and peritubular cells, also help direct SSC activity. This review focuses on interstitial (interstitial macrophages, Leydig cells and vasculature) and peritubular (peritubular macrophages and peritubular myoid cells) cells and their role in regulating the SSC self-renewal and differentiation in mammals. Leydig cells, the major steroidogenic cells in the testis, influence SSCs through secreted factors, such as insulin growth factor 1 (IGF1) and colony-stimulating factor 1 (CSF1). Macrophages interact with SSCs through various potential mechanisms, such as CSF1 and retinoic acid (RA), to induce the proliferation or differentiation of SSCs respectively. Vasculature influences SSC dynamics through CSF1 and vascular endothelial growth factor (VEGF) and by regulating oxygen levels. Lastly, peritubular myoid cells produce one of the most well-known factors that is required for SSC self-renewal, glial cell line-derived neurotrophic factor (GDNF), as well as CSF1. Overall, SSC interactions with interstitial and peritubular cells are critical for SSC function and are an important underlying factor promoting male fertility.
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Affiliation(s)
- Sarah J Potter
- Division of Reproductive SciencesCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Tony DeFalco
- Division of Reproductive SciencesCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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