1
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Zuloaga DG, Lafrican JJ, Zuloaga KL. Androgen regulation of behavioral stress responses and the hypothalamic-pituitary-adrenal axis. Horm Behav 2024; 162:105528. [PMID: 38503191 PMCID: PMC11144109 DOI: 10.1016/j.yhbeh.2024.105528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/02/2024] [Accepted: 03/06/2024] [Indexed: 03/21/2024]
Abstract
Testosterone is a powerful steroid hormone that can impact the brain and behavior in various ways, including regulating behavioral and neuroendocrine (hypothalamic-pituitary-adrenal (HPA) axis) stress responses. Early in life androgens can act to alter development of brain regions associated with stress regulation, which ultimately impacts the display of stress responses later in life. Adult circulating androgens can also influence the expression of distinct genes and proteins that regulate stress responses. These changes in the brain are hypothesized to underlie the potent effects of androgens in regulating behaviors related to stress and stress-induced activation of the HPA axis. Androgens can induce alterations in these functions through direct binding to the androgen receptor (AR) or following conversion to estrogens and subsequent binding to estrogen receptors including estrogen receptor alpha (ERα), beta (ERβ), and G protein-coupled estrogen receptor 1 (GPER1). In this review, we focus on the role of androgens in regulating behavioral and neuroendocrine stress responses at different stages of the lifespan and the sex hormone receptors involved in regulating these effects. We also review the specific brain regions and cell phenotypes upon which androgens are proposed to act to regulate stress responses with an emphasis on hypothalamic and extended amygdala subregions. This knowledge of androgen effects on these neural systems is critical for understanding how sex hormones regulate stress responses.
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Affiliation(s)
- Damian G Zuloaga
- Department of Psychology, University at Albany, Albany, NY, USA.
| | | | - Kristen L Zuloaga
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, NY, USA
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2
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Zito S, Nosari G, Pigoni A, Moltrasio C, Delvecchio G. Association between testosterone levels and mood disorders: A minireview. J Affect Disord 2023; 330:48-56. [PMID: 36841309 DOI: 10.1016/j.jad.2023.02.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 02/27/2023]
Abstract
BACKGROUND Although many studies reported the neuropsychiatric involvement of testosterone (T) levels in the development of mood disorders, its role in this disabling disorder is still not well understood. Therefore, in this review, we aim to summarize the current literature exploring serum testosterone levels in both major depressive disorder (MDD) and bipolar disorder (BD), with particular attention given to the possible causal relationship between pathological mood alterations and T levels. METHODS We selected 9 original studies from a bibliographic search on PubMed, excluding studies on hormonal therapy and other psychiatric disorders other than mood disorders. RESULTS The results reported by the reviewed studies were conflicting especially with regards to the presence of dysfunctional levels of T in patients with BD. Specifically, while MDD was found to be associated with low levels of T compared to healthy controls (HC), in BD the results were highly heterogeneous, with a mixed picture of reduced, increased or no difference in T levels in BD patients compared to HC. LIMITATIONS Studies were highly heterogeneous in terms of samples employed, psychometric scales used for assessing depressive symptoms, T assay methods and therapeutic regimens. CONCLUSIONS Overall, T levels were shown to be reduced in both MDD and BD patients, ultimately suggesting that T could be useful as a biomarker in mood disorders and provide guidance for future research.
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Affiliation(s)
- Silvana Zito
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Guido Nosari
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Alessandro Pigoni
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Chiara Moltrasio
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giuseppe Delvecchio
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
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3
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Culbert KM, Milá Roa A, Stevens K, Sisk CL, Burt SA, Klump KL. Pubertal emergence of testosterone effects on depressive symptoms in boys. JCPP ADVANCES 2022; 2. [DOI: 10.1002/jcv2.12088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Kristen M. Culbert
- Department of Psychology Michigan State University East Lansing Michigan USA
| | - Antonio Milá Roa
- Department of Psychology University of Nevada Las Vegas Nevada USA
| | - Kimberly Stevens
- Department of Psychology University of Nevada Las Vegas Nevada USA
| | - Cheryl L. Sisk
- Neuroscience Program Michigan State University East Lansing Michigan USA
| | - S. Alexandra Burt
- Department of Psychology Michigan State University East Lansing Michigan USA
| | - Kelly L. Klump
- Department of Psychology Michigan State University East Lansing Michigan USA
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4
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Saleki K, Banazadeh M, Saghazadeh A, Rezaei N. Aging, testosterone, and neuroplasticity: friend or foe? Rev Neurosci 2022; 34:247-273. [PMID: 36017670 DOI: 10.1515/revneuro-2022-0033] [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: 04/01/2022] [Accepted: 07/03/2022] [Indexed: 11/15/2022]
Abstract
Neuroplasticity or neural plasticity implicates the adaptive potential of the brain in response to extrinsic and intrinsic stimuli. The concept has been utilized in different contexts such as injury and neurological disease. Neuroplasticity mechanisms have been classified into neuroregenerative and function-restoring processes. In the context of injury, neuroplasticity has been defined in three post-injury epochs. Testosterone plays a key yet double-edged role in the regulation of several neuroplasticity alterations. Research has shown that testosterone levels are affected by numerous factors such as age, stress, surgical procedures on gonads, and pharmacological treatments. There is an ongoing debate for testosterone replacement therapy (TRT) in aging men; however, TRT is more useful in young individuals with testosterone deficit and more specific subgroups with cognitive dysfunction. Therefore, it is important to pay early attention to testosterone profile and precisely uncover its harms and benefits. In the present review, we discuss the influence of environmental factors, aging, and gender on testosterone-associated alterations in neuroplasticity, as well as the two-sided actions of testosterone in the nervous system. Finally, we provide practical insights for further study of pharmacological treatments for hormonal disorders focusing on restoring neuroplasticity.
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Affiliation(s)
- Kiarash Saleki
- Student Research Committee, Babol University of Medical Sciences, 47176 47745 Babol, Iran.,USERN Office, Babol University of Medical Sciences, 47176 47745 Babol, Iran.,Systematic Review and Meta-analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), 14197 33151 Tehran, Iran
| | - Mohammad Banazadeh
- Systematic Review and Meta-analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), 14197 33151 Tehran, Iran.,Pharmaceutical Sciences and Cosmetic Products Research Center, Kerman University of Medical Sciences, 76169 13555 Kerman, Iran
| | - Amene Saghazadeh
- Systematic Review and Meta-analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), 14197 33151 Tehran, Iran.,Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, 14197 33151 Tehran, Iran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, 14197 33151 Tehran, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, 14176 13151 Tehran, Iran.,Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), 14197 33151 Tehran, Iran
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5
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Williams ES, Mazei-Robison M, Robison AJ. Sex Differences in Major Depressive Disorder (MDD) and Preclinical Animal Models for the Study of Depression. Cold Spring Harb Perspect Biol 2022; 14:a039198. [PMID: 34404738 PMCID: PMC8886985 DOI: 10.1101/cshperspect.a039198] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Depression and related mood disorders constitute an enormous burden on health, quality of life, and the global economy, and women have roughly twice the lifetime risk of men for experiencing depression. Here, we review sex differences in human brain physiology that may be connected to the increased susceptibility of women to major depressive disorder (MDD). Moreover, we summarize decades of preclinical research using animal models for the study of mood dysfunction that uncover some of the potential molecular, cellular, and circuit-level mechanisms that may underlie sex differences and disease etiology. We place particular emphasis on a series of recent studies demonstrating the central contribution of the circuit projecting from ventral hippocampus to nucleus accumbens and how inherent sex differences in the excitability of this circuit may predict and drive depression-related behaviors. The findings covered in this review underscore the continued need for studies using preclinical models and circuit-specific strategies for uncovering molecular and physiological mechanisms that could lead to potential sex-specific diagnosis, prognosis, prevention, and/or treatments for MDD and other mood disorders.
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Affiliation(s)
- Elizabeth S Williams
- Department of Physiology, Michigan State University, East Lansing, Michigan 48824, USA
| | | | - A J Robison
- Department of Physiology, Michigan State University, East Lansing, Michigan 48824, USA
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6
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Hodges TE, Puri TA, Blankers SA, Qiu W, Galea LAM. Steroid hormones and hippocampal neurogenesis in the adult mammalian brain. VITAMINS AND HORMONES 2021; 118:129-170. [PMID: 35180925 DOI: 10.1016/bs.vh.2021.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hippocampal neurogenesis persists across the lifespan in many species, including rodents and humans, and is associated with cognitive performance and the pathogenesis of neurodegenerative disease and psychiatric disorders. Neurogenesis is modulated by steroid hormones that change across development and differ between the sexes in rodents and humans. Here, we discuss the effects of stress and glucocorticoid exposure from gestation to adulthood as well as the effects of androgens and estrogens in adulthood on neurogenesis in the hippocampus. Throughout the review we highlight sex differences in the effects of steroid hormones on neurogenesis and how they may relate to hippocampal function and disease. These data highlight the importance of examining age and sex when evaluating the effects of steroid hormones on hippocampal neurogenesis.
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Affiliation(s)
- Travis E Hodges
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Department of Psychology, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Tanvi A Puri
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Samantha A Blankers
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Wansu Qiu
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Liisa A M Galea
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Department of Psychology, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.
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7
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Blankers SA, Galea LA. Androgens and Adult Neurogenesis in the Hippocampus. ANDROGENS: CLINICAL RESEARCH AND THERAPEUTICS 2021; 2:203-215. [PMID: 35024692 PMCID: PMC8744005 DOI: 10.1089/andro.2021.0016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 08/19/2021] [Indexed: 11/12/2022]
Abstract
Adult neurogenesis in the hippocampus is modulated by steroid hormones, including androgens, in male rodents. In this review, we summarize research showing that chronic exposure to androgens, such as testosterone and dihydrotestosterone, enhances the survival of new neurons in the dentate gyrus of male, but not female, rodents, via the androgen receptor. However, the neurogenesis promoting the effect of androgens in the dentate gyrus may be limited to younger adulthood as it is not evident in middle-aged male rodents. Although direct exposure to androgens in adult or middle age does not significantly influence neurogenesis in female rodents, the aromatase inhibitor letrozole enhances neurogenesis in the hippocampus of middle-aged female mice. Unlike other androgens, androgenic anabolic steroids reduce neurogenesis in the hippocampus of male rodents. Collectively, the research indicates that the ability of androgens to enhance hippocampal neurogenesis in adult rodents is dependent on dose, androgen type, sex, duration, and age. We discuss these findings and how androgens may be influencing neuroprotection, via neurogenesis in the hippocampus, in the context of health and disease.
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Affiliation(s)
- Samantha A. Blankers
- Graduate Program in Neuroscience, The University of British Columbia, Vancouver, Canada
- Djavad Mowafaghian Centre for Brain Health, The University of British Columbia, Vancouver, Canada
| | - Liisa A.M. Galea
- Graduate Program in Neuroscience, The University of British Columbia, Vancouver, Canada
- Djavad Mowafaghian Centre for Brain Health, The University of British Columbia, Vancouver, Canada
- Department of Psychology, The University of British Columbia, Vancouver, Canada
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8
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Ellis SN, Honeycutt JA. Sex Differences in Affective Dysfunction and Alterations in Parvalbumin in Rodent Models of Early Life Adversity. Front Behav Neurosci 2021; 15:741454. [PMID: 34803622 PMCID: PMC8600234 DOI: 10.3389/fnbeh.2021.741454] [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: 07/14/2021] [Accepted: 10/13/2021] [Indexed: 01/08/2023] Open
Abstract
The early life environment markedly influences brain and behavioral development, with adverse experiences associated with increased risk of anxiety and depressive phenotypes, particularly in females. Indeed, early life adversity (ELA) in humans (i.e., caregiver deprivation, maltreatment) and rodents (i.e., maternal separation, resource scarcity) is associated with sex-specific emergence of anxious and depressive behaviors. Although these disorders show clear sex differences in humans, little attention has been paid toward evaluating sex as a biological variable in models of affective dysfunction; however, recent rodent work suggests sex-specific effects. Two widely used rodent models of ELA approximate caregiver deprivation (i.e., maternal separation) and resource scarcity (i.e., limited bedding). While these approaches model aspects of ELA experienced in humans, they span different portions of the pre-weaning developmental period and may therefore differentially contribute to underlying mechanistic risk. This is borne out in the literature, where evidence suggests differences in trajectories of behavior depending on the type of ELA and/or sex; however, the neural underpinning of these differences is not well understood. Because anxiety and depression are thought to involve dysregulation in the balance of excitatory and inhibitory signaling in ELA-vulnerable brain regions (e.g., prefrontal cortex, amygdala, hippocampus), outcomes are likely driven by alterations in local and/or circuit-specific inhibitory activity. The most abundant GABAergic subtypes in the brain, accounting for approximately 40% of inhibitory neurons, contain the calcium-binding protein Parvalbumin (PV). As PV-expressing neurons have perisomatic and proximal dendritic targets on pyramidal neurons, they are well-positioned to regulate excitatory/inhibitory balance. Recent evidence suggests that PV outcomes following ELA are sex, age, and region-specific and may be influenced by the type and timing of ELA. Here, we suggest the possibility of a combined role of PV and sex hormones driving differences in behavioral outcomes associated with affective dysfunction following ELA. This review evaluates the literature across models of ELA to characterize neural (PV) and behavioral (anxiety- and depressive-like) outcomes as a function of sex and age. Additionally, we detail a putative mechanistic role of PV on ELA-related outcomes and discuss evidence suggesting hormone influences on PV expression/function which may help to explain sex differences in ELA outcomes.
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Affiliation(s)
- Seneca N Ellis
- Program in Neuroscience, Bowdoin College, Brunswick, ME, United States
| | - Jennifer A Honeycutt
- Program in Neuroscience, Bowdoin College, Brunswick, ME, United States.,Department of Psychology, Bowdoin College, Brunswick, ME, United States
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9
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Sefiani A, Geoffroy CG. The Potential Role of Inflammation in Modulating Endogenous Hippocampal Neurogenesis After Spinal Cord Injury. Front Neurosci 2021; 15:682259. [PMID: 34220440 PMCID: PMC8249862 DOI: 10.3389/fnins.2021.682259] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/17/2021] [Indexed: 12/24/2022] Open
Abstract
Currently there are approximately 291,000 people suffering from a spinal cord injury (SCI) in the United States. SCI is associated with traumatic changes in mobility and neuralgia, as well as many other long-term chronic health complications, including metabolic disorders, diabetes mellitus, non-alcoholic steatohepatitis, osteoporosis, and elevated inflammatory markers. Due to medical advances, patients with SCI survive much longer than previously. This increase in life expectancy exposes them to novel neurological complications such as memory loss, cognitive decline, depression, and Alzheimer's disease. In fact, these usually age-associated disorders are more prevalent in people living with SCI. A common factor of these disorders is the reduction in hippocampal neurogenesis. Inflammation, which is elevated after SCI, plays a major role in modulating hippocampal neurogenesis. While there is no clear consensus on the mechanism of the decline in hippocampal neurogenesis and cognition after SCI, we will examine in this review how SCI-induced inflammation could modulate hippocampal neurogenesis and provoke age-associated neurological disorders. Thereafter, we will discuss possible therapeutic options which may mitigate the influence of SCI associated complications on hippocampal neurogenesis.
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10
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Parish SJ, Simon JA, Davis SR, Giraldi A, Goldstein I, Goldstein SW, Kim NN, Kingsberg SA, Morgentaler A, Nappi RE, Park K, Stuenkel CA, Traish AM, Vignozzi L. International Society for the Study of Women's Sexual Health Clinical Practice Guideline for the Use of Systemic Testosterone for Hypoactive Sexual Desire Disorder in Women. Climacteric 2021; 24:533-550. [PMID: 33792440 DOI: 10.1080/13697137.2021.1891773] [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] [Indexed: 10/21/2022]
Abstract
AIM To provide a clinical practice guideline for the use of testosterone including identification of patients, laboratory testing, dosing, post-treatment monitoring, and follow-up care in women with hypoactive sexual desire disorder (HSDD). METHODS The International Society for the Study of Women's Sexual Health appointed a multidisciplinary panel of experts who performed a literature review of original research, meta-analyses, review papers, and consensus guidelines regarding testosterone use in women. Consensus was reached using a modified Delphi method. OUTCOMES A clinically useful guideline following a biopsychosocial assessment and treatment approach for the safe and efficacious use of testosterone in women with HSDD was developed including measurement, indications, formulations, prescribing, dosing, monitoring, and follow-up. RESULTS Although the Global Position Statement endorses testosterone therapy for only postmenopausal women, limited data also support the use in late reproductive age premenopausal women, consistent with the International Society for the Study of Women's Sexual Health Process of Care for the Management of HSDD. Systemic transdermal testosterone is recommended for women with HSDD not primarily related to modifiable factors or comorbidities such as relationship or mental health problems. Current available research supports a moderate therapeutic benefit. Safety data show no serious adverse events with physiologic testosterone use, but long-term safety has not been established. Before initiation of therapy, clinicians should provide an informed consent. Shared decision-making involves a comprehensive discussion of off-label use, as well as benefits and risks. A total testosterone level should not be used to diagnose HSDD, but as a baseline for monitoring. Government-approved transdermal male formulations can be used cautiously with dosing appropriate for women. Patients should be assessed for signs of androgen excess and total testosterone levels monitored to maintain concentrations in the physiologic premenopausal range. Compounded products cannot be recommended because of the lack of efficacy and safety data. CLINICAL IMPLICATIONS This clinical practice guideline provides standards for safely prescribing testosterone to women with HSDD, including identification of appropriate patients, dosing, and monitoring. STRENGTHS AND LIMITATIONS This evidence-based guideline builds on a recently published comprehensive meta-analysis and the Global Position Statement endorsed by numerous societies. The limitation is that testosterone therapy is not approved for women by most regulatory agencies, thereby making prescribing and proper dosing challenging. CONCLUSION Despite substantial evidence regarding safety, efficacy, and clinical use, access to testosterone therapy for the treatment of HSDD in women remains a significant unmet need.
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Affiliation(s)
- Sharon J Parish
- Department of Psychiatry & Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - James A Simon
- IntimMedicine Specialists, George Washington University School of Medicine, Washington, DC, USA
| | - Susan R Davis
- Women's Health Research Program, Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Annamaria Giraldi
- Sexological Clinic, Psychiatric Center, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Irwin Goldstein
- Sexual Medicine, Alvarado Hospital, San Diego, CA, USA.,San Diego Sexual Medicine, San Diego, CA, USA
| | | | - Noel N Kim
- Institute for Sexual Medicine, San Diego, CA, USA
| | - Sheryl A Kingsberg
- University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Abraham Morgentaler
- Men's Health Boston, Beth Israel Deaconess Medical Center, Harvard Medical School, Chestnut Hill, MA, USA
| | - Rossella E Nappi
- Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, Obstetrics and Gynecology Unit, IRCCS S. Matteo Foundation, University of Pavia, Pavia, Italy
| | - Kwangsung Park
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - Cynthia A Stuenkel
- Department of Medicine, UC San Diego School of Medicine, La Jolla, CA, USA
| | - Abdulmaged M Traish
- Departments of Biochemistry and Urology, Boston University School of Medicine, Boston, MA, USA
| | - Linda Vignozzi
- Andrology, Women's Endocrinology & Gender Incongruence Unit, Department of "Excellence" Experimental and Clinical Biomedical Sciences "Mario Serio", Careggi Hospital-University of Florence, Florence, Italy.,Consorzio Interuniversitario I.N.B.B., Rome, Italy
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11
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Parish SJ, Simon JA, Davis SR, Giraldi A, Goldstein I, Goldstein SW, Kim NN, Kingsberg SA, Morgentaler A, Nappi RE, Park K, Stuenkel CA, Traish AM, Vignozzi L. International Society for the Study of Women's Sexual Health Clinical Practice Guideline for the Use of Systemic Testosterone for Hypoactive Sexual Desire Disorder in Women. J Sex Med 2021; 18:849-867. [PMID: 33814355 DOI: 10.1016/j.jsxm.2020.10.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/12/2020] [Accepted: 10/19/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND The Global Consensus Position Statement on the Use of Testosterone Therapy for Women (Global Position Statement) recommended testosterone therapy for postmenopausal women with hypoactive sexual desire disorder (HSDD). AIM To provide a clinical practice guideline for the use of testosterone including identification of patients, laboratory testing, dosing, post-treatment monitoring, and follow-up care in women with HSDD. METHODS The International Society for the Study of Women's Sexual Health appointed a multidisciplinary panel of experts who performed a literature review of original research, meta-analyses, review papers, and consensus guidelines regarding testosterone use in women. Consensus was reached using a modified Delphi method. OUTCOMES A clinically useful guideline following a biopsychosocial assessment and treatment approach for the safe and efficacious use of testosterone in women with HSDD was developed including measurement, indications, formulations, prescribing, dosing, monitoring, and follow-up. RESULTS Although the Global Position Statement endorses testosterone therapy for only postmenopausal women, limited data also support the use in late reproductive age premenopausal women, consistent with the International Society for the Study of Women's Sexual Health Process of Care for the Management of HSDD. Systemic transdermal testosterone is recommended for women with HSDD not primarily related to modifiable factors or comorbidities such as relationship or mental health problems. Current available research supports a moderate therapeutic benefit. Safety data show no serious adverse events with physiologic testosterone use, but long-term safety has not been established. Before initiation of therapy, clinicians should provide an informed consent. Shared decision-making involves a comprehensive discussion of off-label use, as well as benefits and risks. A total testosterone level should not be used to diagnose HSDD, but as a baseline for monitoring. Government-approved transdermal male formulations can be used cautiously with dosing appropriate for women. Patients should be assessed for signs of androgen excess and total testosterone levels monitored to maintain concentrations in the physiologic premenopausal range. Compounded products cannot be recommended because of the lack of efficacy and safety data. CLINICAL IMPLICATIONS This clinical practice guideline provides standards for safely prescribing testosterone to women with HSDD, including identification of appropriate patients, dosing, and monitoring. STRENGTHS & LIMITATIONS This evidence-based guideline builds on a recently published comprehensive meta-analysis and the Global Position Statement endorsed by numerous societies. The limitation is that testosterone therapy is not approved for women by most regulatory agencies, thereby making prescribing and proper dosing challenging. CONCLUSION Despite substantial evidence regarding safety, efficacy, and clinical use, access to testosterone therapy for the treatment of HSDD in women remains a significant unmet need. Parish SJ, Simon JA, Davis SR, et al. International Society for the Study of Women's Sexual Health Clinical Practice Guideline for the Use of Systemic Testosterone for Hypoactive Sexual Desire Disorder in Women. J Sex Med 2021;18:849-867.
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Affiliation(s)
- Sharon J Parish
- Department of Psychiatry & Department of Medicine, Weill Cornell Medical College, New York, NY, USA.
| | - James A Simon
- IntimMedicine Specialists, George Washington University School of Medicine, Washington, DC, USA
| | - Susan R Davis
- Women's Health Research Program, Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Annamaria Giraldi
- Sexological Clinic, Psychiatric Center, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Irwin Goldstein
- Sexual Medicine, Alvarado Hospital, San Diego, CA, USA; San Diego Sexual Medicine, San Diego, CA, USA
| | | | - Noel N Kim
- Institute for Sexual Medicine, San Diego, CA, USA
| | - Sheryl A Kingsberg
- University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Abraham Morgentaler
- Men's Health Boston, Beth Israel Deaconess Medical Center, Harvard Medical School, Chestnut Hill, MA, USA
| | - Rossella E Nappi
- Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, Obstetrics and Gynecology Unit, IRCCS S. Matteo Foundation, University of Pavia, Pavia, Italy
| | - Kwangsung Park
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - Cynthia A Stuenkel
- Department of Medicine, UC San Diego School of Medicine, La Jolla, CA, USA
| | - Abdulmaged M Traish
- Departments of Biochemistry and Urology, Boston University School of Medicine, Boston, MA, USA
| | - Linda Vignozzi
- Andrology, Women's Endocrinology & Gender Incongruence Unit, Department of "Excellence" Experimental and Clinical Biomedical Sciences "Mario Serio"-Careggi Hospital-University of Florence, Florence, Italy; Consorzio Interuniversitario I.N.B.B., Rome, Italy
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12
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Parish SJ, Simon JA, Davis SR, Giraldi A, Goldstein I, Goldstein SW, Kim NN, Kingsberg SA, Morgentaler A, Nappi RE, Park K, Stuenkel CA, Traish AM, Vignozzi L. International Society for the Study of Women's Sexual Health Clinical Practice Guideline for the Use of Systemic Testosterone for Hypoactive Sexual Desire Disorder in Women. J Womens Health (Larchmt) 2021; 30:474-491. [PMID: 33797277 PMCID: PMC8064950 DOI: 10.1089/jwh.2021.29037] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background: The Global Consensus Position Statement on the Use of Testosterone Therapy for Women (Global Position Statement) recommended testosterone therapy for postmenopausal women with hypoactive sexual desire disorder (HSDD). Aim: To provide a clinical practice guideline for the use of testosterone including identification of patients, laboratory testing, dosing, post-treatment monitoring, and follow-up care in women with HSDD. Methods: The International Society for the Study of Women's Sexual Health appointed a multidisciplinary panel of experts who performed a literature review of original research, meta-analyses, review papers, and consensus guidelines regarding testosterone use in women. Consensus was reached using a modified Delphi method. Outcomes: A clinically useful guideline following a biopsychosocial assessment and treatment approach for the safe and efficacious use of testosterone in women with HSDD was developed including measurement, indications, formulations, prescribing, dosing, monitoring, and follow-up. Results: Although the Global Position Statement endorses testosterone therapy for only postmenopausal women, limited data also support the use in late reproductive age premenopausal women, consistent with the International Society for the Study of Women's Sexual Health Process of Care for the Management of HSDD. Systemic transdermal testosterone is recommended for women with HSDD not primarily related to modifiable factors or comorbidities such as relationship or mental health problems. Current available research supports a moderate therapeutic benefit. Safety data show no serious adverse events with physiologic testosterone use, but long-term safety has not been established. Before initiation of therapy, clinicians should provide an informed consent. Shared decision-making involves a comprehensive discussion of off-label use, as well as benefits and risks. A total testosterone level should not be used to diagnose HSDD, but as a baseline for monitoring. Government-approved transdermal male formulations can be used cautiously with dosing appropriate for women. Patients should be assessed for signs of androgen excess and total testosterone levels monitored to maintain concentrations in the physiologic premenopausal range. Compounded products cannot be recommended because of the lack of efficacy and safety data. Clinical Implications: This clinical practice guideline provides standards for safely prescribing testosterone to women with HSDD, including identification of appropriate patients, dosing, and monitoring. Strengths & Limitations: This evidence-based guideline builds on a recently published comprehensive meta-analysis and the Global Position Statement endorsed by numerous societies. The limitation is that testosterone therapy is not approved for women by most regulatory agencies, thereby making prescribing and proper dosing challenging. Conclusion: Despite substantial evidence regarding safety, efficacy, and clinical use, access to testosterone therapy for the treatment of HSDD in women remains a significant unmet need.
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Affiliation(s)
- Sharon J Parish
- Department of Psychiatry, New York Presbyterian Hospital/Westchester Behavioral Health Center, White Plains, New York, USA.,Department of Medicine, New York Presbyterian Hospital/Westchester Behavioral Health Center, White Plains, New York, USA
| | - James A Simon
- IntimMedicine Specialists, George Washington University School of Medicine, Washington, District of Columbia, USA
| | - Susan R Davis
- Women's Health Research Program, Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Annamaria Giraldi
- Sexological Clinic, Psychiatric Center, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Irwin Goldstein
- Sexual Medicine, Alvarado Hospital, San Diego, California, USA.,San Diego Sexual Medicine, San Diego, California, USA
| | | | - Noel N Kim
- Institute for Sexual Medicine, San Diego, California, USA
| | - Sheryl A Kingsberg
- University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Abraham Morgentaler
- Men's Health Boston, Beth Israel Deaconess Medical Center, Harvard Medical School, Chestnut Hill, Massachusetts, USA
| | - Rossella E Nappi
- Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, Obstetrics and Gynecology Unit, IRCCS S. Matteo Foundation, University of Pavia, Pavia, Italy
| | - Kwangsung Park
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - Cynthia A Stuenkel
- Department of Medicine, UC San Diego School of Medicine, La Jolla, California, USA
| | - Abdulmaged M Traish
- Departments of Biochemistry and Urology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Linda Vignozzi
- Andrology, Women's Endocrinology & Gender Incongruence Unit, Department of "Excellence" Experimental and Clinical Biomedical Sciences "Mario Serio"-Careggi Hospital-University of Florence, Florence, Italy.,Consorzio Interuniversitario I.N.B.B., Rome, Italy
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13
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Advances in Knowledge of Androgens: How Intentional and Accidental Neurosteroid Changes Inform Us of Their Action and Role. CURRENT SEXUAL HEALTH REPORTS 2020. [DOI: 10.1007/s11930-020-00276-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Abstract
Purpose of Review
Here, we summarize current knowledge of androgens’ action gained over the recent years.
Recent Findings
Neurosteroids are produced in the brain and peripheral nerves, independent of endocrine glands have been investigated for how they are regulated, and have actions via non-steroid receptor targets to mediate social, affective, and cognitive behavior and to protect the brain. Androgens’ organizing actions in the peri-natal period have effects throughout the lifetime that may be recapitulated later in life during critical periods and at times of challenge. Developmental changes in androgens occur during mid-childhood, adrenarche, puberty, adolescence, young adulthood, middle age, and andropause. Changes in androgens with a 5α-reductase inhibitor, such as finasteride, result in disruptions in organizational and activational functions of androgens that can be unremitting.
Summary
Normal developmental or perturbation in androgens through other means can cause changes in androgen-sensitive phenotypes throughout the lifespan, in part through actions of neurosteroids.
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14
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See CK, Turnbull D, Ritson F, Martin S, Tully P, Wittert G. Association of endogenous testosterone concentration with depression in men: a systematic review protocol. ACTA ACUST UNITED AC 2020; 17:1894-1900. [PMID: 30925504 DOI: 10.11124/jbisrir-2017-004035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The objective of this review is to examine the association between serum testosterone concentration and the presence and severity of depression in men. INTRODUCTION Cross-sectional and longitudinal cohort studies examining the relationship between serum testosterone concentration and depression in men have produced mixed results. There has not, however, been any prior attempt to systematically interrogate the data. Clarification of the relationship has clinical importance because depression may be under-diagnosed in men. INCLUSION CRITERIA This review will consider studies involving community-dwelling men who are not receiving testosterone replacement therapy. The exposure of interest reviewed will include endogenous testosterone concentration measured through validated assays. Studies measuring total and testosterone fraction concentration will be included. This review will include studies with depression or incident depression outcomes as defined by either clinical diagnosis of depression or validated self-administered questionnaire assessing depression symptomatology. METHODS This review will follow the JBI approach for systematic reviews of etiology and risk. The following sources will be searched: PubMed, PsycINFO, Embase, the Cochrane Central Register of Controlled Trials, Australian New Zealand Clinical Trials Registry and the ISRCTN Registry. Analytical observational studies including prospective and retrospective cohort studies, case control studies and analytical cross-sectional studies published in English or other languages with English translation will be considered. Retrieval of full-text studies, assessment of methodological quality and data extraction will be performed independently by two reviewers. Data will be pooled in statistical meta-analysis, where possible. SYSTEMATIC REVIEW REGISTRATION NUMBER PROSPERO CRD42018108273.
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Affiliation(s)
- Chee Keong See
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia.,Freemasons Foundation Centre for Men's Health, The University of Adelaide, Adelaide, Australia.,South Australian Health and Medical Research Institute, Adelaide, Australia.,Putrajaya Hospital, Putrajaya, Malaysia
| | - Deborah Turnbull
- South Australian Health and Medical Research Institute, Adelaide, Australia.,School of Psychology, The University of Adelaide, Adelaide, Australia
| | - Felix Ritson
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia.,School of Psychology, The University of Adelaide, Adelaide, Australia
| | - Sean Martin
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia.,Freemasons Foundation Centre for Men's Health, The University of Adelaide, Adelaide, Australia.,South Australian Health and Medical Research Institute, Adelaide, Australia
| | - Phillip Tully
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia.,Freemasons Foundation Centre for Men's Health, The University of Adelaide, Adelaide, Australia.,South Australian Health and Medical Research Institute, Adelaide, Australia
| | - Gary Wittert
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia.,Freemasons Foundation Centre for Men's Health, The University of Adelaide, Adelaide, Australia.,South Australian Health and Medical Research Institute, Adelaide, Australia
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15
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Saini V, Kaur T, Kalotra S, Kaur G. The neuroplasticity marker PSA-NCAM: Insights into new therapeutic avenues for promoting neuroregeneration. Pharmacol Res 2020; 160:105186. [DOI: 10.1016/j.phrs.2020.105186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 08/25/2020] [Accepted: 08/30/2020] [Indexed: 02/06/2023]
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16
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Jorgensen C, Wang Z. Hormonal Regulation of Mammalian Adult Neurogenesis: A Multifaceted Mechanism. Biomolecules 2020; 10:biom10081151. [PMID: 32781670 PMCID: PMC7465680 DOI: 10.3390/biom10081151] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/27/2020] [Accepted: 08/01/2020] [Indexed: 02/07/2023] Open
Abstract
Adult neurogenesis—resulting in adult-generated functioning, integrated neurons—is still one of the most captivating research areas of neuroplasticity. The addition of new neurons in adulthood follows a seemingly consistent multi-step process. These neurogenic stages include proliferation, differentiation, migration, maturation/survival, and integration of new neurons into the existing neuronal network. Most studies assessing the impact of exogenous (e.g., restraint stress) or endogenous (e.g., neurotrophins) factors on adult neurogenesis have focused on proliferation, survival, and neuronal differentiation. This review will discuss the multifaceted impact of hormones on these various stages of adult neurogenesis. Specifically, we will review the evidence for hormonal facilitation (via gonadal hormones), inhibition (via glucocorticoids), and neuroprotection (via recruitment of other neurochemicals such as neurotrophin and neuromodulators) on newly adult-generated neurons in the mammalian brain.
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Affiliation(s)
- Claudia Jorgensen
- Behavioral Science Department, Utah Valley University, Orem, UT 84058, USA
- Correspondence:
| | - Zuoxin Wang
- Psychology Department and Program in Neuroscience, Florida State University, Tallahassee, FL 32306, USA;
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17
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Effects of exogenous testosterone application on network connectivity within emotion regulation systems. Sci Rep 2020; 10:2352. [PMID: 32047245 PMCID: PMC7012825 DOI: 10.1038/s41598-020-59329-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 01/24/2020] [Indexed: 01/13/2023] Open
Abstract
Studies with steroid hormones underlined the vital role of testosterone on social-emotional processing. However, there is still a lack of studies investigating whether testosterone modulates network connectivity during resting-state. Here, we tested how the exogenous application of testosterone would affect functional connectivity between regions implicated in emotion regulation. In total, 96 male participants underwent resting-state fMRI scanning. Before the measurement, half of the subjects received 5 g TestimTM gel (containing 50 mg testosterone) and the other half a corresponding amount of placebo gel. Seeds for the connectivity analysis were meta-analytically defined. First, all regions associated with emotion regulation were chosen via Neurosynth (data driven). Among those, specific seeds were selected and categorized based on the neural model of emotion regulation by Etkin and colleagues (Etkin et al., 2015) (theory-guided). Resting-state connectivity analysis revealed decreased connectivity between the right DLPFC and the right amygdala as well as between the VMPFC and the left IPL for the testosterone group compared to the placebo group. A complementary dynamic causal modeling (DCM) analysis on findings from the resting-state connectivity analysis underlined a bidirectional coupling which was decreased close to zero by testosterone administration. Our results demonstrate that testosterone administration disrupts resting-state connectivity within fronto-subcortical and fronto-parietal circuits. The findings suggest that even without a specific task (e.g. challenge, reward processing) testosterone modulates brain networks important for social-emotional processing.
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18
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Spritzer MD, Roy EA. Testosterone and Adult Neurogenesis. Biomolecules 2020; 10:biom10020225. [PMID: 32028656 PMCID: PMC7072323 DOI: 10.3390/biom10020225] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/22/2020] [Accepted: 01/28/2020] [Indexed: 12/16/2022] Open
Abstract
It is now well established that neurogenesis occurs throughout adulthood in select brain regions, but the functional significance of adult neurogenesis remains unclear. There is considerable evidence that steroid hormones modulate various stages of adult neurogenesis, and this review provides a focused summary of the effects of testosterone on adult neurogenesis. Initial evidence came from field studies with birds and wild rodent populations. Subsequent experiments with laboratory rodents have tested the effects of testosterone and its steroid metabolites upon adult neurogenesis, as well as the functional consequences of induced changes in neurogenesis. These experiments have provided clear evidence that testosterone increases adult neurogenesis within the dentate gyrus region of the hippocampus through an androgen-dependent pathway. Most evidence indicates that androgens selectively enhance the survival of newly generated neurons, while having little effect on cell proliferation. Whether this is a result of androgens acting directly on receptors of new neurons remains unclear, and indirect routes involving brain-derived neurotrophic factor (BDNF) and glucocorticoids may be involved. In vitro experiments suggest that testosterone has broad-ranging neuroprotective effects, which will be briefly reviewed. A better understanding of the effects of testosterone upon adult neurogenesis could shed light on neurological diseases that show sex differences.
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Affiliation(s)
- Mark D. Spritzer
- Department of Biology, Middlebury College, Middlebury, VT 05753, USA
- Correspondence: ; Tel.: 802-443-5676
| | - Ethan A. Roy
- Graduate School of Education, Stanford University, Stanford, CA 94305, USA;
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19
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Prolactin, Estradiol and Testosterone Differentially Impact Human Hippocampal Neurogenesis in an In Vitro Model. Neuroscience 2020; 454:15-39. [PMID: 31930958 PMCID: PMC7839971 DOI: 10.1016/j.neuroscience.2019.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 12/20/2022]
Abstract
Human hippocampal progenitor cells (HPCs) and tissue express classical sex hormone receptors. Prolactin does not impact human HPCs maintained in a proliferative state. Prolactin increases neuronal differentiation of human HPCs only in the short term. Estradiol and testosterone both increase the cell density of proliferating HPCs. Estradiol and testosterone have no observed effect on differentiating HPCs.
Previous studies have indicated that sex hormones such as prolactin, estradiol and testosterone may play a role in the modulation of adult hippocampal neurogenesis (AHN) in rodents and non-human primates, but so far there has been no investigation of their impact on human hippocampal neurogenesis. Here, we quantify the expression levels of the relevant receptors in human post-mortem hippocampal tissue and a human hippocampal progenitor cell (HPC) line. Secondly, we investigate how these hormones modulate hippocampal neurogenesis using a human in vitro cellular model. Human female HPCs were cultured with biologically relevant concentrations of either prolactin, estradiol or testosterone. Bromodeoxyuridine (BrdU) incorporation, immunocytochemistry (ICC) and high-throughput analyses were used to quantify markers determining cell fate after HPCs were either maintained in a proliferative state or allowed to differentiate in the presence of these hormones. In proliferating cells, estrogen and testosterone increased cell density but had no clear effect on markers of proliferation or cell death to account for this. In differentiating cells, a 3-day treatment of prolactin elicited a transient effect, whereby it increased the proportion of microtubule-associated protein 2 (MAP2)-positive and Doublecortin (DCX)-positive cells, but this effect was not apparent after 7-days. At this timepoint we instead observe a decrease in proliferation. Overall, our study demonstrates relatively minor, and possibly short-term effects of sex hormones on hippocampal neurogenesis in human cells. Further work will be needed to understand if our results differ to previous animal research due to species-specific differences, or whether it relates to limitations of our in vitro model.
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20
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Duarte-Guterman P, Lieblich SE, Wainwright SR, Chow C, Chaiton JA, Watson NV, Galea LAM. Androgens Enhance Adult Hippocampal Neurogenesis in Males but Not Females in an Age-Dependent Manner. Endocrinology 2019; 160:2128-2136. [PMID: 31219567 PMCID: PMC6736050 DOI: 10.1210/en.2019-00114] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 05/24/2019] [Indexed: 01/27/2023]
Abstract
Androgens (testosterone and DHT) increase adult hippocampal neurogenesis by increasing survival of new neurons in male rats and mice via an androgen receptor pathway, but it is not known whether androgens regulate neurogenesis in female rats and whether the effect is age-dependent. We investigated the effects of DHT, a potent androgen, on neurogenesis in young adult and middle-aged male and female rats. Rats were gonadectomized and injected with the DNA synthesis marker bromodeoxyuridine (BrdU). The following day, rats began receiving daily injections of oil or DHT for 30 days. We evaluated cell proliferation (Ki67) and survival of new neurons (BrdU and BrdU/NeuN) in the hippocampus of male and female rats by using immunohistochemistry. As expected, DHT increased the number of BrdU+ cells in young males but surprisingly not in middle-aged males or in young and middle-aged females. In middle age, DHT increased the proportion of BrdU/NeuN cells, an effect driven by females. Androgen receptor expression also increased with aging in both female and male rats, which may contribute to a lack of DHT neurogenic effect in middle age. Our results indicate that DHT regulates adult hippocampal neurogenesis in a sex- and age-dependent manner.
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Affiliation(s)
- Paula Duarte-Guterman
- Djavad Mowafaghian Centre for Brain Health and Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Stephanie E Lieblich
- Djavad Mowafaghian Centre for Brain Health and Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Steven R Wainwright
- Djavad Mowafaghian Centre for Brain Health and Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Carmen Chow
- Djavad Mowafaghian Centre for Brain Health and Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jessica A Chaiton
- Djavad Mowafaghian Centre for Brain Health and Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Neil V Watson
- Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Liisa A M Galea
- Djavad Mowafaghian Centre for Brain Health and Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
- Correspondence: Liisa A. M. Galea, PhD, Djavad Mowafaghian Centre for Brain Health, 2215 Wesbrook Mall, Vancouver, British Columbia V6T 1Z3, Canada. E-mail:
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21
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Smeeth DM, Dima D, Jones L, Jones I, Craddock N, Owen MJ, Rietschel M, Maier W, Korszun A, Rice JP, Mors O, Preisig M, Uher R, Lewis CM, Thuret S, Powell TR. Polygenic risk for circulating reproductive hormone levels and their influence on hippocampal volume and depression susceptibility. Psychoneuroendocrinology 2019; 106:284-292. [PMID: 31039525 PMCID: PMC6597945 DOI: 10.1016/j.psyneuen.2019.04.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 04/04/2019] [Accepted: 04/09/2019] [Indexed: 12/13/2022]
Abstract
Altered reproductive hormone levels have been associated with the pathophysiology of depressive disorders and this risk may be imparted by their modulatory effect upon hippocampal structure and function. Currently it is unclear whether altered levels of reproductive hormones are causally associated with hippocampal volume reductions and the risk of depressive disorders. Here, we utilize genome-wide association study (GWAS) summary statistics from a GWAS focusing on reproductive hormones, consisting of 2913 individuals. Using this data, we generated polygenic risk scores (PRS) for estradiol, progesterone, prolactin and testosterone in the European RADIANT cohort consisting of 176 postpartum depression (PPD) cases (100% female, mean age: 41.6 years old), 2772 major depressive disorder (MDD) cases (68.6% female, mean age: 46.9 years old) and 1588 control participants (62.5% female, mean age: 42.4 years old), for which there was also a neuroimaging subset of 111 individuals (60.4% female, mean age: 50.0 years old). Only the best-fit PRS for estradiol showed a significant negative association with hippocampal volume, as well as many of its individual subfields; including the molecular layer and granule cell layer of the dentate gyrus, subiculum, CA1, CA2/3 and CA4 regions. Interestingly, several of these subfields are implicated in adult hippocampal neurogenesis. When we tested the same estradiol PRS for association with case-control status for PPD or MDD there was no significant relationship observed. Here, we provide evidence that genetic risk for higher plasma estradiol is negatively associated with hippocampal volume, but this does not translate into an increased risk of MDD or PPD. This work suggests that the relationship between reproductive hormones, the hippocampus, and depression is complex, and that there may not be a clear-cut pathway for etiology or risk moderation.
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Affiliation(s)
- Demelza M Smeeth
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Danai Dima
- Department of Psychology, School of Arts and Social Sciences, City, University of London, London, UK; Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Lisa Jones
- Institute of Health & Society, University of Worcester, Worcester, UK
| | - Ian Jones
- MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - Nick Craddock
- MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - Michael J Owen
- MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - Marcella Rietschel
- Department of Psychiatry, University of Bonn, Bonn, Germany; Division of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Mannheim, Germany
| | - Wolfgang Maier
- Department of Psychiatry, University of Bonn, Bonn, Germany
| | - Ania Korszun
- Barts and The London Medical School, Queen Mary University of London, London, UK
| | - John P Rice
- Department of Psychiatry, Washington University, St. Louis, Missouri, USA
| | - Ole Mors
- Psychosis Research Unit, Aarhus University Hospital, Risskov, Denmark
| | - Martin Preisig
- University Hospital Center and University of Lausanne, Lausanne, Switzerland
| | - Rudolf Uher
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Cathryn M Lewis
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Sandrine Thuret
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Timothy R Powell
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
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22
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Wang LJ, Lee SY, Chou WJ, Lee MJ, Tsai CS, Lee TL, Yang CJ, Yang KC, Chen CK, Shyu YC. Testicular Function After Long-Term Methylphenidate Treatment in Boys with Attention-Deficit/Hyperactivity Disorder. J Child Adolesc Psychopharmacol 2019; 29:433-438. [PMID: 30575416 DOI: 10.1089/cap.2018.0126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Objective: Treating attention-deficit/hyperactivity disorder (ADHD) with methylphenidate (MPH) has become increasingly common, while both animal studies and case reports have previously suggested that MPH may exert adverse effects on the reproductive system or gonadal hormones. This study aims to investigate whether long-term MPH treatment of boys with ADHD can induce testicular dysfunction (TD). Methods: A nationwide cohort that included 59,746 boys diagnosed with ADHD and 52,008 healthy subjects retrieved from the National Health Insurance database in Taiwan was also observed between 1999 and 2011. TD was defined by the International Classification of Diseases, 9th revision, Clinical Modifications codes (257.0, 257.1, 257.2, 257.8, or 257.9). Cumulative time of MPH use was categorized into nonuse, short-term use (1-365 days), and long-term use (>365 days). We compared the rate of TD diagnosis between ADHD patients and controls and analyzed the risk of developing a TD after MPH treatment. Results: Compared with the control group (0.06%), the ADHD group had a higher comorbidity rate of TD (0.14%) (adjusted odds ratio [aOR] = 1.95, 95% confidence interval [95% CI]: 1.26-3.04, p = 0.003). However, MPH did not significantly influence the risk of developing TD (adjusted hazard ratio = 1.40, 95% CI: 0.77-2.54, p = 0.272). Compared with ADHD boys without MPH treatment, patients who were prescribed short-term MPH (aOR = 0.96, 95% CI: 0.51-1.82, p = 0.900) and long-term MPH (aOR = 1.40, 95% CI: 0.69-2.83, p = 0.351) showed no significance associated with an increased risk of developing TD. Conclusions: Our nationwide cohort showed that long-term treatment with MPH has no harmful effect on the testosterone function of ADHD patients. However, due to the increased comorbidity rate of ADHD and TD, early recognition and detection of TD in ADHD children have the potential to change the trajectory of TD morbidity later in life.
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Affiliation(s)
- Liang-Jen Wang
- 1Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Sheng-Yu Lee
- 2Department of Psychiatry, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- 3Department of Psychiatry, College of Medicine, Graduate Institute of Medicine, School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Wen-Jiun Chou
- 1Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Min-Jing Lee
- 1Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ching-Shu Tsai
- 1Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Tung-Liang Lee
- 4Department of Microbiology, Soochow University, Taipei, Taiwan
| | - Chun-Ju Yang
- 5Community Medicine Research Center, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Kang-Chung Yang
- 5Community Medicine Research Center, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chih-Ken Chen
- 5Community Medicine Research Center, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
- 6Department of Psychiatry, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Keelung, Taiwan
| | - Yu-Chiau Shyu
- 5Community Medicine Research Center, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
- 7Institute of Molecular Biology, Academia Sinica, Nankang, Taipei, Taiwan
- 8Department of Nursing, Chang Gung University of Science and Technology, Taoyuan City, Taiwan
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23
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Chronic aromatase inhibition increases ventral hippocampal neurogenesis in middle-aged female mice. Psychoneuroendocrinology 2019; 106:111-116. [PMID: 30974324 DOI: 10.1016/j.psyneuen.2019.04.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 04/02/2019] [Indexed: 12/21/2022]
Abstract
Letrozole, a third-generation aromatase inhibitor, prevents the production of estrogens in the final step in conversion from androgens. Due to its efficacy at suppressing estrogens, letrozole has recently taken favor as a first-line adjuvant treatment for hormone-responsive breast cancer in middle-aged women. Though patient response to letrozole has generally been positive, there is conflicting evidence surrounding its effects on the development of depression. It is possible that the potential adverse effects of letrozole on mood are a result of the impact of hormonal fluctuations on neurogenesis in the hippocampus. Thus, to clarify the effects of letrozole on the hippocampus and behavior, we examined how chronic administration affects hippocampal neurogenesis and depressive-like behavior in middle-aged, intact female mice. Mice were given either letrozole (1 mg/kg) or vehicle by injection (i.p.) daily for 3 weeks. Depressive-like behavior was assessed during the last 3 days of treatment using the forced swim test, tail suspension test, and sucrose preference test. The production of new neurons was quantified using the immature neuronal marker doublecortin (DCX), and cell proliferation was quantified using the endogenous marker Ki67. We found that letrozole increased DCX and Ki67 expression and maturation in the dentate gyrus, but had no significant effect on depressive-like behavior. Our findings suggest that a reduction in estrogens in middle-aged females increases hippocampal neurogenesis without any adverse impact on depressive-like behavior; as such, this furthers our understanding of how estrogens modulate neurogenesis, and to the rationale for the utilization of letrozole in the clinical management of breast cancer.
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Turkson S, Kloster A, Hamilton PJ, Neigh GN. Neuroendocrine drivers of risk and resilience: The influence of metabolism & mitochondria. Front Neuroendocrinol 2019; 54:100770. [PMID: 31288042 PMCID: PMC6886586 DOI: 10.1016/j.yfrne.2019.100770] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/20/2019] [Accepted: 07/03/2019] [Indexed: 02/07/2023]
Abstract
The manifestation of risk versus resilience has been considered from varying perspectives including genetics, epigenetics, early life experiences, and type and intensity of the challenge with which the organism is faced. Although all of these factors are central to determining risk and resilience, the current review focuses on what may be a final common pathway: metabolism. When an organism is faced with a perturbation to the environment, whether internal or external, appropriate energy allocation is essential to resolving the divergence from equilibrium. This review examines the potential role of metabolism in the manifestation of stress-induced neural compromise. In addition, this review details the current state of knowledge on neuroendocrine factors which are poised to set the tone of the metabolic response to a systemic challenge. The goal is to provide an essential framework for understanding stress in a metabolic context and appreciation for key neuroendocrine signals.
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Affiliation(s)
- Susie Turkson
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, United States
| | - Alix Kloster
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, United States
| | - Peter J Hamilton
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, United States
| | - Gretchen N Neigh
- Department of Anatomy & Neurobiology, Virginia Commonwealth University, Richmond, VA, United States.
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Yao W, Liu W, Deng K, Wang Z, Wang DH, Zhang XY. GnRH expression and cell proliferation are associated with seasonal breeding and food hoarding in Mongolian gerbils (Meriones unguiculatus). Horm Behav 2019; 112:42-53. [PMID: 30922890 DOI: 10.1016/j.yhbeh.2019.03.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 03/18/2019] [Accepted: 03/22/2019] [Indexed: 12/14/2022]
Abstract
Seasonal brain plasticity contributes to a variety of physiological and behavioral processes. We hypothesized that variations in GnRH expression and cell proliferation facilitated seasonal breeding and food hoarding. Here, we reported seasonal changes in sexual and social behavior, GnRH expression and brain cell proliferation, and the role of photoperiod in inducing seasonal breeding and brain plasticity in Mongolian gerbils (Meriones unguiculatus). The gerbils captured in April and July had more mature sexual development, higher exploratory behavior, and preferred novelty much more than those captured in September. Male gerbils captured in April and July had consistently higher GnRH expression than those captured in September. GnRH expression was also found to be suppressed by food-induced hoarding behavior in the breeding season. Both subadult and adult gerbils from April and July had higher cell proliferation in SVZ, hypothalamus and amygdala compared to those in September. However, adult gerbils captured in September preferred familiar objects, and no seasonal differences were found in cell proliferation in hippocampal dentate gyrus among the three seasons. The laboratory study showed that photoperiod alone did not alter reproductive traits, behavior, cell proliferation or cell survival in the detected brain regions. These findings suggest that the structural variations in GnRH expression in hypothalamus and cell proliferation in hypothalamus, amygdala and hippocampus are associated with seasonal breeding and food hoarding in gerbils. It gives a new insight into the proximate physiological and neural basis for these seasonal life-history traits of breeding and food hoarding in small mammals.
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Affiliation(s)
- Wei Yao
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Institute of Health Sciences, Anhui University, Hefei, Anhui 230601, China
| | - Wei Liu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Deng
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zuoxin Wang
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, FL 32306-1270, USA
| | - De-Hua Wang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xue-Ying Zhang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Cheng J, Wu H, Liu H, Li H, Zhu H, Zhou Y, Li H, Xu W, Xie J. Exposure of Hyperandrogen During Pregnancy Causes Depression- and Anxiety-Like Behaviors, and Reduced Hippocampal Neurogenesis in Rat Offspring. Front Neurosci 2019; 13:436. [PMID: 31139042 PMCID: PMC6519321 DOI: 10.3389/fnins.2019.00436] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 04/16/2019] [Indexed: 01/09/2023] Open
Abstract
The hippocampus is a region in which neurogenesis persists and retains substantial plasticity throughout lifespan. Accumulating evidences indicate an important role of androgens and androgenic signaling in the regulation of offspring hippocampal neurogenesis and the survival of mature or immature neurons and gliocyte. Hyperandrogenic disorders have been associated with depression and anxiety. Previous studies have found that pregnant hyperandrogenism may increase the susceptibility of the offspring to depression or anxiety and lead to abnormal hippocampal neurogenesis in rats. In this study, pregnant rats were given subcutaneous injection of aromatase inhibitor letrozole in order to establish a maternal hyperandrogenic environment for the fetal rats. The lithium chloride (LICl) was used as an intervention agent since a previous study has shown that lithium chloride could promote neurogenesis in the hippocampus. The results revealed that pregnant administration of letrozole resulted in depressive- and anxious-like behaviors in the adolescent period. A remarkable decrease in immature nerve cells marked by doublecortin and mature neurons co-expressed by Brdu and NeuN in adult years were detected in the hippocampal dentate gyrus of adolescent rats. Lithium chloride alleviated the effects on neurobehavioral and promoted the differentiation and proliferation of neural progenitor cells, while a hyperandrogenic intrauterine environment had no effects on astrocytes marked by GFAP in the dentate gyrus. Furthermore, the Wnt/β-catenin signaling pathway related to normal development of hippocampus was examined but there was no significant changes in Wnt signaling pathway members. Our study provides evidence that exposure of androgen during pregnancy leads to alterations in depressive, anxious and stereotypical behaviors and these phenotypes are possibly associated with changes in neurogenesis in the dentate gyrus.
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Affiliation(s)
- Juan Cheng
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China.,Department of Clinical Medicine, Southwest Medical University, Luzhou, China
| | - Haojuan Wu
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China.,Department of Clinical Medicine, Southwest Medical University, Luzhou, China
| | - Huawei Liu
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China
| | - Hua Li
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China
| | - Hua Zhu
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China
| | - Yongmei Zhou
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China
| | - Hongxia Li
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China
| | - Wenming Xu
- Department of Obstetrics and Gynecology, West China Second University Hospital, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Sichuan University, Chengdu, China.,Joint Laboratory of Reproductive Medicine, SCU-CUHK, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Jiang Xie
- Chengdu Third People's Hospital, Affiliated Hospital of Southwest JiaoTong University Medical School, Chengdu, China
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Wang LJ, Lee SY, Chou MC, Lee MJ, Chou WJ. Dehydroepiandrosterone sulfate, free testosterone, and sex hormone-binding globulin on susceptibility to attention-deficit/hyperactivity disorder. Psychoneuroendocrinology 2019; 103:212-218. [PMID: 30711898 DOI: 10.1016/j.psyneuen.2019.01.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/03/2019] [Accepted: 01/21/2019] [Indexed: 02/07/2023]
Abstract
The neuroendocrine system may affect the pathophysiology of gender differences in attention deficit/hyperactivity disorder (ADHD). This study examines whether the relationships among dehydroepiandrosterone sulfate (DHEA-S), free testosterone, or sex hormone-binding globulin (SHBG) and ADHD presentations exhibit gender differences. A total of 113 boys and 35 girls with ADHD (all drug naïve) and 46 and 26 healthy control boys and girls, respectively, were recruited. Blood samples were obtained to measure the serum levels of DHEA-S, free testosterone, and SHBG in each child. The Swanson, Nolan, and Pelham Scale for ADHD Version IV (SNAP-IV) was used to evaluate behavioral symptoms and the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV) and the Conners' Continuous Performance Test (CPT) were utilized to assess neurocognitive functions. Patients with ADHD had lower DHEA-S levels than male and female healthy control subjects, and no significant differences were observed in free testosterone and SHBG levels between the patients and the controls. DHEA-S levels were negatively correlated with children's impulsivity performance in the CPT. SHBG levels were negatively correlated with ADHD behavior symptoms among boys. Free testosterone levels were not significantly correlated with either ADHD clinical symptoms or neuropsychological functions. We propose that DHEA-S serves as a potential biomarker of ADHD and is consistently involved in the pathogenesis of ADHD in both boys and girls. SHBG may be involved in behaviors associated with ADHD in boys. Additional studies with basic scientific measures are warranted to elucidate the relationship between androgen hormones and clinical presentations of ADHD.
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Affiliation(s)
- Liang-Jen Wang
- Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Sheng-Yu Lee
- Department of Psychiatry, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Department of Psychiatry, College of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Miao-Chun Chou
- Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Min-Jing Lee
- Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
| | - Wen-Jiun Chou
- Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
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Ma L, Xu Y, Wang G, Li R. What do we know about sex differences in depression: A review of animal models and potential mechanisms. Prog Neuropsychopharmacol Biol Psychiatry 2019; 89:48-56. [PMID: 30165122 DOI: 10.1016/j.pnpbp.2018.08.026] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/22/2018] [Accepted: 08/24/2018] [Indexed: 12/16/2022]
Abstract
Clinical studies have shown that women are more susceptible to depression than men. Sex differences in depression have been associated with social, cultural, as well as biological factors. In spite of extensive preclinical studies in animal models for depression that have been used for understanding the mechanisms of the disease as well as for new drug development, a substantive lack of attention on sex-specific phenotypes in depression might mask the effect of sex on the outcome. In this review article, we summarize findings on the influence of sex on behavior in the most commonly used animal models for depression. We also discuss the potential underlying mechanisms of such sex-dependent variation in the phenotype, particularly in the neuroendocrine system.
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Affiliation(s)
- Lei Ma
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing 100088, China
| | - Yong Xu
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing 100088, China
| | - Gang Wang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing 100088, China.
| | - Rena Li
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing 100088, China; Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100012, China; Center for Hormone Advanced Science and Education, Roskamp Institute, Sarasota, FL 34243, USA.
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29
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Eid RS, Gobinath AR, Galea LAM. Sex differences in depression: Insights from clinical and preclinical studies. Prog Neurobiol 2019; 176:86-102. [PMID: 30721749 DOI: 10.1016/j.pneurobio.2019.01.006] [Citation(s) in RCA: 203] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 12/21/2018] [Accepted: 01/28/2019] [Indexed: 12/22/2022]
Abstract
Depression represents a global mental health concern, and disproportionally affects women as they are twice more likely to be diagnosed than men. In this review, we provide a summary of evidence to support the notion that differences in depression between men and women span multiple facets of the disease, including epidemiology, symptomology, treatment, and pathophysiology. Through a lens of biological sex, we overview depression-related transcriptional patterns, changes in neuroanatomy and neuroplasticity, and immune signatures. We acknowledge the unique physiological and behavioral demands of pregnancy and motherhood by devoting special attention to depression occurring in the peripartum period. Specifically, we discuss issues surrounding the presentation, time course, treatment, and neurobiology of peripartum depression. We write this review with the intention of highlighting the encouraging advancements in our understanding of sex differences in depression, while underscoring the gaps that remain. A more systematic consideration of biological sex as a variable in depression research will be critical in the discovery and development of pharmacotherapies that are efficacious for both men and women.
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Affiliation(s)
- Rand S Eid
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Aarthi R Gobinath
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Liisa A M Galea
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada; Department of Psychology, University of British Columbia, Vancouver, BC, Canada; Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.
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30
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Wen G, Yao H, Li Y, Ding R, Ren X, Tan Y, Ren W, Yu H, Zhan X, Wang X, Xu E, Yao J, Zhang G, Lu Y, Wu X. Regulation of Tau Protein on the Antidepressant Effects of Ketamine in the Chronic Unpredictable Mild Stress Model. Front Psychiatry 2019; 10:287. [PMID: 31114516 PMCID: PMC6503093 DOI: 10.3389/fpsyt.2019.00287] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/12/2019] [Indexed: 12/31/2022] Open
Abstract
Tau protein is known to play an important role in maintaining microtubule assembly and stabilization, and maintaining the normal morphology of neurons, but several studies have found that chronic stress leads to Tau hyperphosphorylation. A large number of clinical trials have found that ketamine, which is an N-methyl-D-aspartate receptor antagonist, produces a rapid, long-lasting, and potent antidepressant effect in patients suffering from major depression. This rapid antidepressant effect of ketamine, which involves many mechanisms, has attracted wide attention. However, the relationship between ketamine's antidepressant effects and Tau protein has rarely been examined. We used C57BL/6 and Tau KO mice exposed to 42 days of chronic unpredictable mild stress (the CUMS model) to investigate the effect of ketamine on behavioral changes and synaptic functioning of the hippocampus. The results showed that a single treatment of ketamine rapidly relieved the CUMS-induced anhedonia, depression-like, and anxious behaviors of the C57BL/6 mice. The abnormal behaviors were accompanied by increased levels of specific alterations of hyperphosphorylated Tau protein in cytoplasm and synapse in the hippocampus of the C57BL/6 mice, but ketamine reduced the aggregation of hyperphosphorylated Tau protein only in the synapse. We also found that CUMS exposure reduced the levels of GluA1 and PSD95 in the hippocampus of the C57BL/6 mice and that these deficits were reversed by ketamine. However, the Tau KO mice did not develop any stress-induced depressive behaviors or deficits of hippocampal function. The antidepressant effect of ketamine may decrease the levels of hyperphosphorylated Tau protein in synapse of C57BL/6 mice.
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Affiliation(s)
- Gehua Wen
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Hui Yao
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Yanning Li
- Department of Forensic Medicine, School of Basic Medicine, Gannan Medical University, Ganzhou, China
| | - Runtao Ding
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Xinghua Ren
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Yaqing Tan
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Weishu Ren
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Hao Yu
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Xiaoni Zhan
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Xiaolong Wang
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Enyu Xu
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Jun Yao
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Guohua Zhang
- School of Forensic Medicine, China Medical University, Shenyang, China
| | - Yan Lu
- Key Laboratory of Health Ministry in Congenital Malformation, the Affiliated Sheng Jing Hospital of China Medical University, Shenyang, China
| | - Xu Wu
- School of Forensic Medicine, China Medical University, Shenyang, China
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Ramzan F, Azam AB, Monks DA, Zovkic IB. Androgen receptor is a negative regulator of contextual fear memory in male mice. Horm Behav 2018; 106:10-18. [PMID: 30172646 DOI: 10.1016/j.yhbeh.2018.08.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/21/2018] [Accepted: 08/29/2018] [Indexed: 10/28/2022]
Abstract
Although sex-hormones have a well-documented role in memory formation, most literature has focused on estrogens, whereas the role of androgens and their receptor (the androgen receptor; AR) in fear memory is relatively unexplored. To address this gap, we used a transgenic mouse model of AR overexpression (CMV-AR) to determine if AR regulates fear memory, and if this effect can be reversed either by the removal of circulating androgens via gonadectomy, or by antagonising AR activity with flutamide. We found that AR overexpression results in reduced freezing in response to foot shock, and that this difference is reversed with both gonadectomy and flutamide treatment. Differences between genotypes were reinstated by testosterone replacement in gonadectomized mice, suggesting that reduced fear memory in mutants results from AR activation by testosterone and is not secondary to group differences in circulating testosterone. Potential transcriptional mechanisms by which CMV-AR exerts its effects on fear memory were assessed by quantitating the expression of memory-related genes in area CA1 of the hippocampus. Several genes that are altered with AR inhibition and activation, including genes that encode for the histone variant H2A.Z, cholinergic receptors, glutamate receptors, and brain-derived neurotrophic factor. Overall, our findings suggest that AR is a negative regulator of fear memory and identify potential gene targets through which AR may mediate this effect.
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Affiliation(s)
- Firyal Ramzan
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Amber B Azam
- Department of Cell and Systems Biology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - D Ashley Monks
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada; Department of Cell and Systems Biology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Iva B Zovkic
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.
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Guo L, Chen YX, Hu YT, Wu XY, He Y, Wu JL, Huang ML, Mason M, Bao AM. Sex hormones affect acute and chronic stress responses in sexually dimorphic patterns: Consequences for depression models. Psychoneuroendocrinology 2018; 95:34-42. [PMID: 29793095 DOI: 10.1016/j.psyneuen.2018.05.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/12/2018] [Accepted: 05/10/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Alterations in peripheral sex hormones may play an important role in sex differences in terms of stress responses and mood disorders. It is not yet known whether and how stress-related brain systems and brain sex steroid levels fluctuate in relation to changes in peripheral sex hormone levels, or whether the different sexes show different patterns. We aimed to investigate systematically, in male and female rats, the effect of decreased circulating sex hormone levels following gonadectomy on acute and chronic stress responses, manifested as changes in plasma and hypothalamic sex steroids and hypothalamic stress-related molecules. METHOD Experiment (Exp)-1: Rats (14 males, 14 females) were gonadectomized or sham-operated (intact); Exp-2: gonadectomized and intact rats (28 males, 28 females) were exposed to acute foot shock or no stressor; and Exp-3: gonadectomized and intact rats (32 males, 32 females) were exposed to chronic unpredictable mild stress (CUMS) or no stressor. For all rats, plasma and hypothalamic testosterone (T), estradiol (E2), and the expression of stress-related molecules were determined, including corticotropin-releasing hormone, vasopressin, oxytocin, aromatase, and the receptors for estrogens, androgens, glucocorticoids, and mineralocorticoids. RESULTS Surprisingly, no significant correlation was observed in terms of plasma sex hormones, brain sex steroids, and hypothalamic stress-related molecule mRNAs (p > 0.113) in intact or gonadectomized, male or female, rats. Male and female rats, either intact or gonadectomized and exposed to acute or chronic stress, showed different patterns of stress-related molecule changes. CONCLUSION Diminished peripheral sex hormone levels lead to different peripheral and central patterns of change in the stress response systems in male and female rats. This has implications for the choice of models for the study of the different types of mood disorders which also show sex differences.
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Affiliation(s)
- Lei Guo
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China
| | - Yi-Xi Chen
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China
| | - Yu-Ting Hu
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China
| | - Xue-Yan Wu
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China
| | - Yang He
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China
| | - Juan-Li Wu
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China
| | - Man-Li Huang
- Department of Mental Health, First Affiliated Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Hangzhou, P.R.China
| | - Matthew Mason
- Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Sciences, KNAW, Meibergdreef 47, 1105 BA, Amsterdam, The Netherlands
| | - Ai-Min Bao
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, National Clinical Research Center for Mental Health Disorders, Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310058, P.R.China.
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Ludwig B, Roy B, Dwivedi Y. Role of HPA and the HPG Axis Interaction in Testosterone-Mediated Learned Helpless Behavior. Mol Neurobiol 2018; 56:394-405. [PMID: 29704202 DOI: 10.1007/s12035-018-1085-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 04/11/2018] [Indexed: 12/25/2022]
Abstract
Affective disorders show sex-specific differences in prevalence, symptoms, and complications. One hypothesis for this discrepancy is the interaction between the hypothalamic-pituitary-adrenal (HPA) axis and hypothalamic-pituitary-gonadal (HPG) axis. The present study investigates the influence of androgen on the behavioral phenotype and explores how it interacts with HPA axis genes. Gonadectomized (GDX) and GDX rats treated with testosterone propionate (T) were tested for learned helplessness (LH) behavior and compared with tested controls (TC). Prefrontal cortex was used for analyses of HPG- axis-related genes (androgen receptor, (Ar); estrogen receptor-β (Er-β)) and HPA axis-related genes (corticotropin-releasing hormone, (Crh); glucocorticoid receptor, (Nr3c1); corticotropin-releasing hormone receptor 1, (Crhr1); corticotropin-releasing hormone receptor 2, (Crhr2); FK506 binding protein 5, (Fkbp5)). Promoter-specific CpG methylation in the Crh gene was determined by bisulfite sequencing. Chromatin immunoprecipitation (ChIP) assay was used for determining ER-β binding on the proximal promoter region of Crh gene. Serum testosterone levels confirmed a testosterone-depleted GDX group, a group with supraphysiological levels of testosterone (T) and another group with physiological levels of testosterone (control (C)). Unlike GDX rats, T group exhibited significantly higher LH score when compared with any other group. Crh and Fkbp5 genes were significantly upregulated in GDX group compared with controls, whereas Er-β showed a significant downregulation in the same group. Methylation analysis showed no significant differences in-between groups. ChIP assay was unable to determine a significant change in ER-β binding but revealed a notable contrast in Crh promoter occupancy between T and GDX groups. Altogether, the present study reveals an increased susceptibility to depression-like behavior due to chronic supraphysiological level of androgen via HPA axis inhibition.
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Affiliation(s)
- Birgit Ludwig
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, SC711 Sparks Center, 1720 7th Avenue South, Birmingham, AL, 35294, USA
| | - Bhaskar Roy
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, SC711 Sparks Center, 1720 7th Avenue South, Birmingham, AL, 35294, USA
| | - Yogesh Dwivedi
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, SC711 Sparks Center, 1720 7th Avenue South, Birmingham, AL, 35294, USA.
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Gagliano-Jucá T, Travison TG, Nguyen PL, Kantoff PW, Taplin ME, Kibel AS, Manley R, Hally K, Bearup R, Beleva YM, Huang G, Edwards RR, Basaria S. Effects of Androgen Deprivation Therapy on Pain Perception, Quality of Life, and Depression in Men With Prostate Cancer. J Pain Symptom Manage 2018; 55:307-317.e1. [PMID: 28941963 PMCID: PMC5794536 DOI: 10.1016/j.jpainsymman.2017.09.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/12/2017] [Accepted: 09/14/2017] [Indexed: 02/05/2023]
Abstract
CONTEXT Previous animal and human research suggests that testosterone has antinociceptive properties. Castration in male rodents increases pain perception which is reversed by testosterone replacement. Pain perception also improves in hypogonadal men with testosterone therapy. However, it remains unclear whether androgen deprivation therapy (ADT) in men with prostate cancer (PCa) is associated with an increase in pain perception. OBJECTIVES To evaluate the effects of ADT on pain perception, depression and quality of life (QOL) in men with PCa. METHODS Thirty-seven men with PCa about to undergo ADT with leuprolide acetate (ADT group) were followed prospectively for six months to evaluate changes in clinical and experimental pain. Forty men who had previously undergone prostatectomy for localized PCa and were in remission served as controls (non-ADT group). All participants were eugonadal at study entry. Primary outcomes were changes in clinical pain (assessed with Brief Pain Inventory questionnaire) and experimental pain (assessed with quantitative sensory testing). Secondary outcomes included evaluation of depression, anxiety levels, and quality of life. RESULTS Serum testosterone levels significantly decreased in the ADT group but remained unchanged in the non-ADT group. There were no significant changes in pain thresholds, ratings, or other responses to quantitative sensory tests over the 6-month course of the study. Clinical pain did not differ between the two groups, and no changes from baseline were observed in either group. Men undergoing ADT did experience worsening of depression (0.93; 95% CI = 0.04-1.82; P = 0.042) and QOL related to physical role limitation (-18.28; 95% CI = -30.18 to -6.37; P = 0.003). CONCLUSION ADT in men with PCa is associated with worsening of depression scores and QOL but is not associated with changes in clinical pain or pain sensitivity.
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Affiliation(s)
- Thiago Gagliano-Jucá
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Paul L Nguyen
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Philip W Kantoff
- Department of Medicine, Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, New York, USA
| | - Mary-Ellen Taplin
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Adam S Kibel
- Division of Urology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Robert Manley
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Kathleen Hally
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Richelle Bearup
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Yusnie M Beleva
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Grace Huang
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Robert R Edwards
- Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Shehzad Basaria
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
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Owens SJ, Murphy CE, Purves-Tyson TD, Weickert TW, Shannon Weickert C. Considering the role of adolescent sex steroids in schizophrenia. J Neuroendocrinol 2018; 30. [PMID: 28941299 DOI: 10.1111/jne.12538] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/06/2017] [Accepted: 09/20/2017] [Indexed: 12/29/2022]
Abstract
Schizophrenia is a disabling illness that is typically first diagnosed during late adolescence to early adulthood. It has an unremitting course and is often treatment-resistant. Many clinical aspects of the illness suggest that sex steroid-nervous system interactions may contribute to the onset, course of symptoms and the cognitive impairment displayed by men and women with schizophrenia. Here, we discuss the actions of oestrogen and testosterone on the brain during adolescent development and in schizophrenia from the perspective of experimental studies in animals, human post-mortem studies, magnetic resonance imaging studies in living humans and clinical trials of sex steroid-based treatments. We present evidence of potential beneficial, as well as detrimental, effects of both testosterone and oestrogen. We provide a rationale for the necessity to further elucidate sex steroid mechanisms of action at different ages, sexes and brain regions to more fully understand the role of testosterone and oestrogen in the pathophysiology of schizophrenia. The weight of the evidence suggests that sex steroid hormones influence mammalian brain function, including both cognition and emotion, and that pharmaceutical agents aimed at sex steroid receptors appear to provide a novel treatment avenue to reduce symptoms and improve cognition in men and women with schizophrenia.
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Affiliation(s)
- S J Owens
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia
- Faculty of Medicine, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - C E Murphy
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia
- Faculty of Medicine, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - T D Purves-Tyson
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia
- Faculty of Medicine, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - T W Weickert
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia
- Faculty of Medicine, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - C Shannon Weickert
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick, NSW, Australia
- Faculty of Medicine, School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
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Gheorghe A, Qiu W, Galea LAM. Hormonal Regulation of Hippocampal Neurogenesis: Implications for Depression and Exercise. Curr Top Behav Neurosci 2018; 43:379-421. [PMID: 30414016 DOI: 10.1007/7854_2018_62] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Adult hippocampal neurogenesis exists in all mammalian species, including humans, and although there has been considerable research investigating the function and regulation of neurogenesis, there remain many open questions surrounding the complexity of this phenomenon. This stems partially from the fact that neurogenesis is a multistage process that involves proliferation, differentiation, migration, survival, and eventual integration of new cells into the existing hippocampal circuitry, each of which can be independently influenced. The function of adult neurogenesis in the hippocampus is related to stress regulation, behavioral efficacy of antidepressants, long-term spatial memory, forgetting, and pattern separation. Steroid hormones influence the regulation of hippocampal neurogenesis, stress regulation, and cognition and differently in males and females. In this chapter, we will briefly tap into the complex network of steroid hormone modulation of neurogenesis in the hippocampus with specific emphasis on stress, testosterone, and estrogen. We examine the possible role of neurogenesis in the etiology of depression and influencing treatment by examining the influence of both pharmacological (selective serotonin reuptake inhibitors, tricyclic antidepressants) treatments and non-pharmacological (exercise) remedies.
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Affiliation(s)
- Ana Gheorghe
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada
| | - Wansu Qiu
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada
| | - Liisa A M Galea
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada. .,Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada. .,Department of Psychology, University of British Columbia, Vancouver, BC, Canada.
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Spritzer MD, Panning AW, Engelman SM, Prince WT, Casler AE, Georgakas JE, Jaeger EC, Nelson LR, Roy EA, Wagner BA. Seasonal and sex differences in cell proliferation, neurogenesis, and cell death within the dentate gyrus of adult wild-caught meadow voles. Neuroscience 2017; 360:155-165. [DOI: 10.1016/j.neuroscience.2017.07.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 07/11/2017] [Accepted: 07/18/2017] [Indexed: 12/28/2022]
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38
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Dinh KT, Yang DD, Nead KT, Reznor G, Trinh QD, Nguyen PL. Association between androgen deprivation therapy and anxiety among 78 000 patients with localized prostate cancer. Int J Urol 2017; 24:743-748. [DOI: 10.1111/iju.13409] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 06/05/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Kathryn T Dinh
- Department of Medicine; University of Washington; Seattle Washington USA
| | - David D Yang
- Harvard Medical School; Boston Massachusetts USA
| | - Kevin T Nead
- Department of Radiation Oncology; University of Pennsylvania Perelman School of Medicine; Philadelphia Pennsylvania USA
| | - Gally Reznor
- Center for Surgery and Public Health; Brigham and Women's Hospital; Boston Massachusetts USA
| | - Quoc-Dien Trinh
- Harvard Medical School; Boston Massachusetts USA
- Center for Surgery and Public Health; Brigham and Women's Hospital; Boston Massachusetts USA
- Division of Urological Surgery; Brigham and Women's Hospital; Boston Massachusetts USA
| | - Paul L Nguyen
- Harvard Medical School; Boston Massachusetts USA
- Department of Radiation Oncology; Dana-Farber Cancer Institute; Brigham and Women's Hospital; Boston Massachusetts USA
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Testosterone levels in healthy men correlate negatively with serotonin 4 receptor binding. Psychoneuroendocrinology 2017; 81:22-28. [PMID: 28426945 DOI: 10.1016/j.psyneuen.2017.03.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 03/14/2017] [Indexed: 12/20/2022]
Abstract
The serotonergic system integrates sex steroid information and plays a central role in mood and stress regulation, cognition, appetite and sleep. This interplay may be critical for likelihood of developing depressive episodes, at least in a subgroup of sensitive individuals. The serotonin 4 receptor (5-HT4R) indexes central serotonergic tonus, which may be related to endogenous sex-steroid levels in the mentally healthy state even though this remains elusive. Here we evaluate if peripheral levels of estradiol and testosterone are associated with 5-HT4R binding as imaged by [11C]SB207145 positron emission tomography in a group of 41 healthy men. We estimated global 5-HT4R binding using a latent variable model framework, which models shared correlation between 5-HT4R across multiple brain regions (hippocampus, amygdala, posterior and anterior cingulate, thalamus, pallidostriatum and neocortex). We tested whether testosterone and estradiol predict global 5-HT4R, adjusting for age. We found that testosterone, but not estradiol, correlated negatively with global 5-HT4R levels (p=0.02) suggesting that men with high levels of testosterone have higher cerebral serotonergic tonus. Our findings corroborate the link between sex hormone levels and serotonin signalling. Future longitudinal studies in clinical relevant populations are needed to elucidate the potential importance of testosterone in the pathophysiology of e.g. major depression and its treatment.
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40
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Walker FR, Pfingst K, Carnevali L, Sgoifo A, Nalivaiko E. In the search for integrative biomarker of resilience to psychological stress. Neurosci Biobehav Rev 2017; 74:310-320. [DOI: 10.1016/j.neubiorev.2016.05.003] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 04/26/2016] [Accepted: 05/06/2016] [Indexed: 12/20/2022]
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41
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Holschbach MA, Lonstein JS. Motherhood and infant contact regulate neuroplasticity in the serotonergic midbrain dorsal raphe. Psychoneuroendocrinology 2017; 76:97-106. [PMID: 27898359 PMCID: PMC5272870 DOI: 10.1016/j.psyneuen.2016.10.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 10/03/2016] [Accepted: 10/25/2016] [Indexed: 12/22/2022]
Abstract
The adult brain shows remarkable neuroplasticity in response to hormones and the socioemotional modifications that they influence. In females with reproductive and maternal experience, this neuroplasticity includes the birth and death of cells in several forebrain regions involved in maternal caregiving and postpartum affective state. Such plasticity in midbrain sites critical for these behavioral and emotional processes has never been examined, though. By visualizing bromodeoxyuridine (BrdU) to label mitotic cells, NeuroD for neuronal precursors, and TUNEL to identify dying cells, we found that the midbrain dorsal raphe nucleus (DR, the source of most ascending serotoninergic projections) exhibited significant neuroplasticity in response to motherhood. Specifically, BrdU analyses revealed that DR newborn cell survival (but not proliferation) was regulated by reproductive state, such that cells born early postpartum were less likely to survive 12 days to reach the late postpartum period compared to cells born during late pregnancy that survived 12 days to reach the early postpartum period. Many of the surviving cells in the DR were NeuN immunoreactive, suggesting a neuronal phenotype. Consistent with these findings, late postpartum rats had fewer NeuroD-immunoreactive DR cells than early postpartum rats. Maternal experience contributed to the late postpartum reduction in DR newborn cell survival because removing the litter at parturition increased cell survival as well as reduced cell death. Unlike cytogenesis in the maternal hippocampus, which is reduced by circulating glucocorticoids, DR newborn cell survival was unaffected by postpartum adrenalectomy. These effects of reproductive state and motherhood on DR plasticity were associated with concurrent changes in DR levels of serotonin's precursor, 5-HTP, and its metabolite, 5-HIAA. Our results demonstrate for the first time that cytogenesis occurs in the midbrain DR of any adult mammal, that DR plasticity is influenced by female reproductive state and maternal experience, and that this plasticity is accompanied by changes in DR serotonergic function. Because serotonin is critical for postpartum caregiving behaviors and maternal affective state, plasticity in the DR may contribute to the neurochemical changes necessary for successful motherhood.
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Affiliation(s)
- M Allie Holschbach
- Neuroscience Program, 108 Giltner Hall, Michigan State University, East Lansing, MI 48824, USA.
| | - Joseph S Lonstein
- Neuroscience Program, 108 Giltner Hall, Michigan State University, East Lansing, MI 48824, USA
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42
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Dossat AM, Jourdi H, Wright KN, Strong CE, Sarkar A, Kabbaj M. Viral-mediated Zif268 expression in the prefrontal cortex protects against gonadectomy-induced working memory, long-term memory, and social interaction deficits in male rats. Neuroscience 2017; 340:243-257. [PMID: 27816701 PMCID: PMC5154846 DOI: 10.1016/j.neuroscience.2016.10.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 10/17/2016] [Accepted: 10/25/2016] [Indexed: 01/28/2023]
Abstract
In humans, some males experience reductions in testosterone levels, as a natural consequence of aging or in the clinical condition termed hypogonadism, which are associated with impaired cognitive performance and mood disorder(s). Some of these behavioral deficits can be reversed by testosterone treatment. Our previous work in rats reported that sex differences in the expression of the transcription factor Zif268, a downstream target of testosterone, within the medial prefrontal cortex (mPFC) mediates sex differences in social interaction. In the present study, we aimed to examine the effects of gonadectomy (GNX) in male rats on mPFC Zif268 expression, mood and cognitive behaviors. We also examined whether reinstitution of Zif268 in GNX rats will correct some of the behavioral deficits observed following GNX. Our results show that GNX induced a downregulation of Zif268 protein in the mPFC, which was concomitant with impaired memory in the y-maze and spontaneous object recognition test, reduced social interaction time, and depression-like behaviors in the forced swim test. Reinstitution of mPFC Zif268, using a novel adeno-associated-viral (AAV) construct, abrogated GNX-induced working memory and long-term memory impairments, and reductions in social interaction time, but not GNX-induced depression-like behaviors. These findings suggest that mPFC Zif268 exerts beneficial effects on memory and social interaction, and could be a potential target for novel treatments for behavioral impairments observed in hypogonadal and aged men with declining levels of gonadal hormones.
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Affiliation(s)
- Amanda M Dossat
- Program in Neuroscience, Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL 32306, United States
| | - Hussam Jourdi
- Department of Biology, Faculty of Science, University of Balamand, Souk-El-Gharb, Mount-Lebanon, Lebanon
| | - Katherine N Wright
- Program in Neuroscience, Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL 32306, United States
| | - Caroline E Strong
- Program in Neuroscience, Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL 32306, United States
| | - Ambalika Sarkar
- Program in Neuroscience, Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL 32306, United States
| | - Mohamed Kabbaj
- Program in Neuroscience, Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL 32306, United States.
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Nikmahzar E, Jahanshahi M, Ghaemi A, Naseri GR, Moharreri AR, Lotfinia AA. Hippocampal serotonin-2A receptor-immunoreactive neurons density increases after testosterone therapy in the gonadectomized male mice. Anat Cell Biol 2016; 49:259-272. [PMID: 28127501 PMCID: PMC5266105 DOI: 10.5115/acb.2016.49.4.259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 10/06/2016] [Accepted: 12/09/2016] [Indexed: 12/15/2022] Open
Abstract
The change of steroid levels may also exert different modulatory effects on the number and class of serotonin receptors present in the plasma membrane. The effects of chronic treatment of testosterone for anxiety were examined and expression of 5-HT2A serotonergic receptor, neuron, astrocyte, and dark neuron density in the hippocampus of gonadectomized male mice was determined. Thirty-six adult male NMRI mice were randomly divided into six groups: intact-no testosterone treatment (No T), gonadectomy (GDX)-No T, GDX-Vehicle, GDX-6.25 mg/kg testosterone (T), GDX-12.5 mg/kg T, and GDX-25 mg/kg T. Anxiety-related behavior was evaluated using elevated plus maze apparatus. The animals were anesthetized after 48 hours after behavioral testing, and decapitated and micron slices were prepared for immunohistochemical as well as histopathological assessment. Subcutaneous injection of testosterone (25 mg/kg) may induce anxiogenic-like behavior in male mice. In addition, immunohistochemical data reveal reduced expression of 5-HT2A serotonergic receptor after gonadectomy in all areas of the hippocampus. However, treatment with testosterone could increase the mean number of dark neurons as well as immunoreactive neurons in CA1 and CA3 area, dose dependently. The density of 5-HT2A receptor-immunoreactive neurons may play a crucial role in the induction of anxiety like behavior. As reduction in such receptor expression have shown to significantly enhance anxiety behaviors. However, replacement of testosterone dose dependently enhances the number of 5-HT2A receptor-immunoreactive neurons and interestingly also reduced anxiety like behaviors.
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Affiliation(s)
- Emsehgol Nikmahzar
- Neuroscience Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mehrdad Jahanshahi
- Department of Anatomy, Neuroscience Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Amir Ghaemi
- Shefa Neuroscience Research Center, Tehran, Iran
| | - Gholam Reza Naseri
- Department of Anatomy, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ali Reza Moharreri
- Department of Anatomy, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
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Mahmoud R, Wainwright SR, Chaiton JA, Lieblich SE, Galea LA. Ovarian hormones, but not fluoxetine, impart resilience within a chronic unpredictable stress model in middle-aged female rats. Neuropharmacology 2016; 107:278-293. [DOI: 10.1016/j.neuropharm.2016.01.033] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 01/18/2016] [Accepted: 01/22/2016] [Indexed: 01/30/2023]
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45
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Young-Adult Male Rats' Vulnerability to Chronic Mild Stress Is Reflected by Anxious-Like instead of Depressive-Like Behaviors. NEUROSCIENCE JOURNAL 2016; 2016:5317242. [PMID: 27433469 PMCID: PMC4940564 DOI: 10.1155/2016/5317242] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 06/01/2016] [Indexed: 11/20/2022]
Abstract
In a previous study, we found that chronic mild stress (CMS) paradigm did not induce anhedonia in young-adult male rats but it reduced their body weight gain. These contrasting results encouraged us to explore other indicators of animal's vulnerability to stress such as anxious-like behaviors, since stress is an etiologic factor also for anxiety. Thus, in this study, we evaluated the vulnerability of these animals to CMS using behavioral tests of depression or anxiety and measuring serum corticosterone. Male Wistar rats were exposed to four weeks of CMS; the animals' body weight and sucrose preference (indicator of anhedonia) were assessed after three weeks, and, after the fourth week, some animals were evaluated in a behavioral battery (elevated plus maze, defensive burying behavior, and forced swimming tests); meanwhile, others were used to measure serum corticosterone. We found that CMS (1) did not affect sucrose preference, immobility behavior in the forced swimming test, or serum corticosterone; (2) decreased body weight gain; and (3) increased the rat's entries into closed arms of the plus maze and the cumulative burying behavior. These data indicate that young male rats' vulnerability to CMS is reflected as poor body weight gain and anxious-like instead of depressive-like behaviors.
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Enzymatic Depletion of the Polysialic Acid Moiety Associated with the Neural Cell Adhesion Molecule Inhibits Antidepressant Efficacy. Neuropsychopharmacology 2016; 41:1670-80. [PMID: 26530284 PMCID: PMC4832030 DOI: 10.1038/npp.2015.337] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 10/04/2015] [Accepted: 10/27/2015] [Indexed: 01/01/2023]
Abstract
Antidepressant drugs are too often ineffective, the exact mechanism of efficacy is still ambiguous, and there has been a paucity of novel targets for pharmacotherapy. In an attempt to understand the pathogenesis of depression and subsequently develop more efficacious antidepressant drugs, multiple theories have been proposed, including the modulation of neurotransmission, the upregulation of neurogenesis and neurotrophic factors, normalizing hypothalamic-pituitary-adrenal reactivity, and the reduction of neuroinflammation; all of which have supporting lines of evidence. Therefore, an ideal molecular target for novel pharmaceutical intervention would function at the confluence of these theories. The polysialylated form of the neural cell adhesion molecule (PSA-NCAM) functions broadly, serving to mediate synaptic plasticity, neurogenesis, neurotrophic factor signaling, and inflammatory signaling throughout the brain; all of which are associated with the pathophysiology and treatment of depression. Moreover, the expression of PSA-NCAM is reduced by depression, and conversely enhanced by antidepressant treatment, particularly within the hippocampus. Here we demonstrate that selectively cleaving the polysialic acid moiety, using the bacteriophage-derived enzyme endoneuraminidase N, completely inhibits the antidepressant efficacy of the selective-serotonin reuptake inhibitor fluoxetine (FLX) in a chronic unpredictable stress model of depression. We also observe a corresponding attenuation of FLX-induced hippocampal neuroplasticity, including decreased hippocampal neurogenesis, synaptic density, and neural activation. These data indicate that PSA-NCAM-mediated neuroplasticity is necessary for antidepressant action; therefore PSA-NCAM represents an interesting, and novel, target for pharmacotherapy.
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Mahmoud R, Wainwright SR, Galea LAM. Sex hormones and adult hippocampal neurogenesis: Regulation, implications, and potential mechanisms. Front Neuroendocrinol 2016; 41:129-52. [PMID: 26988999 DOI: 10.1016/j.yfrne.2016.03.002] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/12/2016] [Accepted: 03/14/2016] [Indexed: 11/16/2022]
Abstract
Neurogenesis within the adult hippocampus is modulated by endogenous and exogenous factors. Here, we review the role of sex hormones in the regulation of adult hippocampal neurogenesis in males and females. The review is framed around the potential functional implications of sex hormone regulation of adult hippocampal neurogenesis, with a focus on cognitive function and mood regulation, which may be related to sex differences in incidence and severity of dementia and depression. We present findings from preclinical studies of endogenous fluctuations in sex hormones relating to reproductive function and ageing, and from studies of exogenous hormone manipulations. In addition, we discuss the modulating roles of sex, age, and reproductive history on the relationship between sex hormones and neurogenesis. Because sex hormones have diverse targets in the central nervous system, we overview potential mechanisms through which sex hormones may influence hippocampal neurogenesis. Lastly, we advocate for a more systematic consideration of sex and sex hormones in studying the functional implications of adult hippocampal neurogenesis.
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Affiliation(s)
- Rand Mahmoud
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, Canada
| | - Steven R Wainwright
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, Canada
| | - Liisa A M Galea
- Department of Psychology, University of British Columbia, Vancouver, Canada; Centre for Brain Health, University of British Columbia, Vancouver, Canada.
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48
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Soultanov V, Fedotova J, Nikitina T, Roschin V, Ordyan N, Hritcu L. Antidepressant-Like Effect of Ropren® in β-Amyloid-(25–35) Rat Model of Alzheimer’s Disease with Altered Levels of Androgens. Mol Neurobiol 2016; 54:2611-2621. [DOI: 10.1007/s12035-016-9848-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/09/2016] [Indexed: 10/22/2022]
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49
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Wainwright SR, Workman JL, Tehrani A, Hamson DK, Chow C, Lieblich SE, Galea LAM. Testosterone has antidepressant-like efficacy and facilitates imipramine-induced neuroplasticity in male rats exposed to chronic unpredictable stress. Horm Behav 2016; 79:58-69. [PMID: 26774465 DOI: 10.1016/j.yhbeh.2016.01.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 01/04/2016] [Accepted: 01/11/2016] [Indexed: 12/29/2022]
Abstract
Hypogonadal men are more likely to develop depression, while testosterone supplementation shows antidepressant-like effects in hypogonadal men and facilitates antidepressant efficacy. Depression is associated with hypothalamic-pituitary-adrenal (HPA) axis hyperactivity and testosterone exerts suppressive effects on the HPA axis. The hippocampus also plays a role in the feedback regulation of the HPA axis, and depressed patients show reduced hippocampal neuroplasticity. We assessed the antidepressant-like effects of testosterone with, or without, imipramine on behavioral and neural endophenotypes of depression in a chronic unpredictable stress (CUS) model of depression. A 21-day CUS protocol was used on gonadectomized male Sprague-Dawley rats treated with vehicle, 1mg of testosterone propionate, 10mg/kg of imipramine, or testosterone and imipramine in tandem. Testosterone treatment reduced novelty-induced hypophagia following CUS exposure, but not under non-stress conditions, representing state-dependent effects. Further, testosterone increased the latency to immobility in the forced swim test (FST), reduced basal corticosterone, and reduced adrenal mass in CUS-exposed rats. Testosterone also facilitated the effects of imipramine by reducing the latency to immobility in the FST and increasing sucrose preference. Testosterone treatment had no significant effect on neurogenesis, though the combination of testosterone and imipramine increased PSA-NCAM expression in the ventral dentate gyrus. These findings demonstrate the antidepressant- and anxiolytic-like effects of testosterone within a CUS model of depression, and provide insight into the mechanism of action, which appears to be independent of enhanced hippocampal neurogenesis.
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Affiliation(s)
| | - Joanna L Workman
- Department of Psychology, University of British Columbia, Canada
| | - Amir Tehrani
- Department of Psychology, University of British Columbia, Canada
| | - Dwayne K Hamson
- Department of Psychology, University of British Columbia, Canada
| | - Carmen Chow
- Department of Psychology, University of British Columbia, Canada; Centre for Brain Health, University of British Columbia, Canada
| | - Stephanie E Lieblich
- Department of Psychology, University of British Columbia, Canada; Centre for Brain Health, University of British Columbia, Canada
| | - Liisa A M Galea
- Graduate Program in Neuroscience, University of British Columbia, Canada; Department of Psychology, University of British Columbia, Canada; Centre for Brain Health, University of British Columbia, Canada.
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50
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Shin MS, Chung KJ, Ko IG, Kim SH, Jin JJ, Kim SE, Lee JM, Ji ES, Kim TW, Cho HS, Kim CH, Cho YS, Kim CJ, Kim KH. Effects of surgical and chemical castration on spatial learning ability in relation to cell proliferation and apoptosis in hippocampus. Int Urol Nephrol 2016; 48:517-27. [PMID: 26781653 DOI: 10.1007/s11255-015-1200-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 12/23/2015] [Indexed: 11/28/2022]
Abstract
PURPOSE Chemical castration using luteinizing hormone-releasing hormone agonists and/or anti-androgens is an alternative to surgical castration. Goserelin and bicalutamide are representative drugs used for chemical castration. The effects of chemical castration on sexual functions are well documented; however, the possibility that chemical castration might induce undesirable effects on brain functions has been raised. We investigated the effects of chemical castration and surgical castration on spatial learning ability in relation to cell proliferation and apoptosis in hippocampus. METHODS Bilateral orchiectomy was performed for surgical castration, and chemical castration was induced by treatment with goserelin or bicalutamide for 28 days. To find out the effects of goserelin and bicalutamide with those of orchiectomy on the spatial learning ability, radial eight-arm maze test was performed. To find out the effects of goserelin and bicalutamide with those of orchiectomy in relation to cell proliferation and apoptosis in the hippocampus, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling staining, and immunohistochemistry for 5-bromo-2'-deoxyuridine, doublecortin, and caspase-3 were performed. Western blot for brain-derived neurotrophic factor, tyrosine kinase receptor B, Bax, and Bcl-2 in the hippocampus was also performed. RESULTS Orchiectomy caused deterioration of spatial learning ability with suppression of cell proliferation and enhancement of apoptosis in the hippocampus. However, treatment with goserelin and bicalutamide had no effect on spatial learning ability. Cell proliferation and apoptosis were not altered by treatment with goserelin and bicalutamide either. CONCLUSIONS Surgical castration causes deterioration of spatial learning ability, while chemical castration does not impair spatial learning ability. We should find out further mechanisms affect to the relationship between androgen level and neurogenesis and neuronal apoptosis.
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Affiliation(s)
- Mal-Soon Shin
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Kyung Jin Chung
- Department of Urology, Gachon University Gil Medical Center, Gachon University School of Medicine, Incheon, 405-760, Republic of Korea
| | - Il-Gyu Ko
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Sang-Hoon Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Jun-Jang Jin
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Sung-Eun Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Jae-Min Lee
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Eun-Sang Ji
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Tae-Woon Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Han-Sam Cho
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Chang Hee Kim
- Department of Urology, Gachon University Gil Medical Center, Gachon University School of Medicine, Incheon, 405-760, Republic of Korea
| | - Young-Sam Cho
- Department of Urology, School of Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University, Jongro-gu, Seoul, 110-746, Republic of Korea
| | - Chang-Ju Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Khae-Hawn Kim
- Department of Urology, Gachon University Gil Medical Center, Gachon University School of Medicine, Incheon, 405-760, Republic of Korea.
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