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Bera P, Chakrabarty D, Vaidyanathan S. Painful Ejaculation Associated With Atomoxetine and Bupropion: A Case Report. J Clin Psychopharmacol 2024:00004714-990000000-00272. [PMID: 39008874 DOI: 10.1097/jcp.0000000000001894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
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Van Vyve L, Dierckx B, Lim CG, Danckaerts M, Koch BCP, Häge A, Banaschewski T. Pharmacotherapy for ADHD in children and adolescents: A summary and overview of different European guidelines. Eur J Pediatr 2024; 183:1047-1056. [PMID: 38095716 DOI: 10.1007/s00431-023-05370-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 11/27/2023] [Accepted: 12/05/2023] [Indexed: 01/27/2024]
Abstract
Attention deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by a persistent pattern of inattention, hyperactivity, and impulsivity. It is the most common neurodevelopmental disorder presenting to pediatric services, and pediatricians are often involved in the early assessment, diagnosis, and treatment of children with ADHD. The treatment of ADHD typically involves a multimodal approach that encompasses a combination of psychoeducation, parent/teacher training, psychosocial/psychotherapeutic interventions, and pharmacotherapy. Concerning pharmacotherapy, guidelines vary in drug choice and sequencing, with psychostimulants, such as methylphenidate and (lis)dexamfetamine, generally being the favored initial treatment. Alternatives include atomoxetine and guanfacine. Pharmacotherapy has been proven effective, but close follow-up focusing on physical growth, cardiovascular monitoring, and the surveillance of potential side effects including tics, mood fluctuations, and psychotic symptoms, is essential. This paper presents an overview of current pharmacological treatment options for ADHD and explores disparities in treatment guidelines across different European countries. Conclusion: Pharmacological treatment options for ADHD in children and adolescents are effective and generally well-tolerated. Pharmacotherapy for ADHD is always part of a multimodal approach. While there is a considerable consensus among European guidelines on pharmacotherapy for ADHD, notable differences exist, particularly concerning the selection and sequencing of various medications. What is Known: • There is a significant base of evidence for pharmacological treatment for ADHD in children and adolescents. • Pediatricians are often involved in assessment, diagnosis and management of children with ADHD. What is New: • Our overview of different European guidelines reveals significant agreement in the context of pharmacotherapy for ADHD in children and adolescents. • Discrepancies exist primarily in terms of selection and sequencing of different medications.
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Affiliation(s)
| | - B Dierckx
- Erasmus MC, Rotterdam, The Netherlands
| | - C G Lim
- Institute of Mental Health, Singapore, Singapore
| | | | | | - A Häge
- Zentralinstitut für Seelische Gesundheit, Mannheim, Germany
| | - T Banaschewski
- Zentralinstitut für Seelische Gesundheit, Mannheim, Germany
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McGrane IR, Campbell TJ. Probable Genitourinary Adverse Events Associated With Atomoxetine in an Adult Male: A Case Report. J Pharm Pract 2020; 34:962-965. [PMID: 32862763 DOI: 10.1177/0897190020953022] [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: 11/16/2022]
Abstract
Atomoxetine is a norepinephrine reuptake inhibitor used for treatment of attention-deficit/hyperactivity disorder. Prescribing information from the manufacturer lists genitourinary-related adverse events such as urinary hesitancy/retention and priapism as precautions for atomoxetine. We report a case of urinary hesitancy with milky, white-colored discharge associated with atomoxetine use in a 42-year-old male. The onset of genitourinary symptoms occurred within 2 days of atomoxetine 40 mg daily initiation. Laboratories, urinalysis, sexually transmitted infection analysis, and genital examinations were all unremarkable. Within 2 days of atomoxetine discontinuation, the genitourinary symptoms were no longer present. We calculated a Naranjo adverse event score of 5, indicating atomoxetine probably caused the genitourinary adverse events. A review of literature suggests that urine outflow obstruction-related adverse events occur more commonly in men compared to women. Discontinuation of atomoxetine appears to lead to rapid resolution of the adverse events. Additionally, spontaneous ejaculation and sexual side effects rarely occur with atomoxetine. Clinicians should educate and monitor patients explicitly for genitourinary-related adverse events, as they may not be spontaneously reported.
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Affiliation(s)
- Ian R McGrane
- Skaggs School of Pharmacy, College of Health, The University of Montana, Missoula, MT, USA
| | - Trevor J Campbell
- Skaggs School of Pharmacy, College of Health, The University of Montana, Missoula, MT, USA
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Soldati L, Bianchi-Demicheli F, Schockaert P, Köhl J, Bolmont M, Hasler R, Perroud N. Sexual Function, Sexual Dysfunctions, and ADHD: A Systematic Literature Review. J Sex Med 2020; 17:1653-1664. [PMID: 32402814 DOI: 10.1016/j.jsxm.2020.03.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/20/2020] [Accepted: 03/28/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND The scientific literature on sexuality among mentally ill patients clearly shows a higher prevalence of sexual disorders for many mental disorders, but little is known about sexuality in individuals suffering from ADHD. Clinicians will often assume that specific difficulties of ADHD are bound to affect sexual functioning. AIM The aim of this study was to provide a review of the literature to gain better knowledge about sexuality in subjects with ADHD and to discuss screening and management of their potential sexual problems. METHODS A systematic review of the literature was performed in Pubmed, PsychInfo, and Embase databases. MAIN OUTCOME MEASURES The main outcome measures were sexual function and sexual dysfunctions. RESULTS The studies indicated that subjects with ADHD report more sexual desire, more masturbation frequency, less sexual satisfaction, and more sexual dysfunctions than the general population. CLINICAL IMPLICATIONS Clinicians working with subjects with ADHD should explore the quality of their sexual life. STRENGTHS & LIMITATIONS This is the first systematic review of the sexuality of individuals with ADHD. However, the results are limited by the small number of studies, by the small sample size of many studies, and the potential for bias. CONCLUSIONS ADHD is a mental disorder affecting sexual health. Further studies are warranted to learn more about sexuality in subjects with ADHD. Soldati L, Bianchi-Demicheli F, Schockaert P, et al. Sexual Function, Sexual Dysfunctions, and ADHD: A Systematic Literature Review. J Sex Med 2020;17:1653-1664.
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Affiliation(s)
- Lorenzo Soldati
- Sexual Medicine and Sexology unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland.
| | - Francesco Bianchi-Demicheli
- Sexual Medicine and Sexology unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland; Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Pauline Schockaert
- Sexual Medicine and Sexology unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland
| | - John Köhl
- Sexual Medicine and Sexology unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland
| | - Mylène Bolmont
- Sexual Medicine and Sexology unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland; Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Roland Hasler
- Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland; TRE Unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland
| | - Nader Perroud
- Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland; TRE Unit, Division of Psychiatric Specialties, Department of Psychiatry, University Hospital of Geneva, Geneva, Switzerland; Department of Psychiatry, Dalhousie University, Halifax, NS, Canada
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MacDonald T, Wimalaguna PS, Akosile W. Case report: Severe and treatment-resistant spontaneous ejaculation secondary to atomoxetine. Australas Psychiatry 2019; 27:198-199. [PMID: 30994032 DOI: 10.1177/1039856218815746] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chierrito de Oliveira D, Guerrero de Sousa P, Borges Dos Reis C, Tonin FS, Maria Steimbach L, Virtuoso S, Fernandez-Llimos F, Pontarolo R, Cristina Conegero Sanches A. Safety of Treatments for ADHD in Adults: Pairwise and Network Meta-Analyses. J Atten Disord 2019; 23:111-120. [PMID: 28366111 DOI: 10.1177/1087054717696773] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The aim of the study was to analyze evidence comparing the profile of drugs used to treat ADHD in adult patients. METHOD Systematic searches were conducted in electronic databases. Randomized, double-blind, parallel controlled trials that evaluated the safety of drugs in ADHD were included. The statistical analyses were conducted by pairwise meta-analyses and mixed treatment comparison (MTC). RESULTS Ten ( n = 3006) trials were included in the analyses. We observed statistical differences for the following outcomes: decreased appetite between atomoxetine and placebo (odds ratio [OR] = 0.15, 95% credibility interval [CrI] = [0.05, 0.38]) and extended-release mixed amphetamine salts and placebo (OR = 0.06, 95% CrI = [0.00, 0.51]); insomnia between atomoxetine and placebo (OR = 0.48, 95% CrI = [0.27, 0.88]) and extended-release mixed amphetamine salts and placebo (OR = 0.23, 95% CrI = [0.06, 0.76]); sleepiness between atomoxetine and methylphenidate OROS (OR = 0.24, 95% CrI = [0.06, 0.97]); and decreased libido between atomoxetine and placebo (OR = 0.28, 95% CrI = [0.08, 0.90]). CONCLUSION It was possible to generate evidence about the safety profile of different ADHD drugs.
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Affiliation(s)
| | | | | | | | | | - Suzane Virtuoso
- 1 Universidade Estadual do Oeste do Paraná, Cascavel, Brazil
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De Crescenzo F, Ziganshina LE, Yudina EV, Kaplan YC, Ciabattini M, Wei Y, Hoyle CHV. Noradrenaline reuptake inhibitors (NRIs) for attention deficit hyperactivity disorder (ADHD) in adults. Hippokratia 2018. [DOI: 10.1002/14651858.cd013044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Franco De Crescenzo
- Catholic University of the Sacred Heart; Institute of Psychiatry and Psychology; L.go A. Gemelli 8 Rome Italy 00168
| | - Liliya Eugenevna Ziganshina
- Kazan (Volga region) Federal University; Research & Education Centre for Evidence-Based Medicine Cochrane Russia; 18 Kremlevskaya Street, 420008 14-15 Malaya Krasnaya Street, 420015 Kazan Tatarstan Russian Federation
- Kazan (Volga region) Federal University; Department of Basic and Clinical Pharmacology; Kazan Russian Federation
| | - Ekaterina V Yudina
- Kazan (Volga region) Federal University; Research & Education Centre for Evidence-Based Medicine Cochrane Russia; 18 Kremlevskaya Street, 420008 14-15 Malaya Krasnaya Street, 420015 Kazan Tatarstan Russian Federation
- Kazan (Volga region) Federal University; Department of Basic and Clinical Pharmacology; Kazan Russian Federation
| | - Yusuf Cem Kaplan
- Izmir Katip Celebi University School of Medicine; Department of Pharmacology; Izmir Turkey 35360
| | | | - Yinghui Wei
- University of Plymouth; Centre for Mathematical Sciences, School of Computing, Electronics and Mathematics; Plymouth UK
| | - Charles HV Hoyle
- Kazan (Volga region) Federal University; Research & Education Centre for Evidence-Based Medicine Cochrane Russia; 18 Kremlevskaya Street, 420008 14-15 Malaya Krasnaya Street, 420015 Kazan Tatarstan Russian Federation
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Preclinical Models for Assessment of Antidepressant Abuse Potential. CURRENT SEXUAL HEALTH REPORTS 2017. [DOI: 10.1007/s11930-017-0128-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kim HW, Kim E, Kim JH, Park J, Bahn GH, Lee YJ, Jhung K, Shin D. The Revised Korean Practice Parameter for the Treatment of Attention-Deficit Hyperactivity Disorder (III) - Pharmacological Treatment -. Soa Chongsonyon Chongsin Uihak 2017. [DOI: 10.5765/jkacap.2017.28.2.70] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Hyo-Won Kim
- Department of Psychiatry, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Eunjoo Kim
- Department of Psychiatry, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea
| | - Ji-Hoon Kim
- Department of Psychiatry, Pusan National University School of Medicine, Busan, Korea
| | - Jangho Park
- Department of Psychiatry, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Geon Ho Bahn
- Department of Psychiatry, Kyung Hee University School of Medicine, Seoul, Korea
| | - Yeon Jung Lee
- Department of Psychiatry, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Kyungun Jhung
- Department of Psychiatry, International St. Mary’s Hospital, Catholic Kwandong University, Incheon, Korea
| | - Dongwon Shin
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea
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De Crescenzo F, Cortese S, Adamo N, Janiri L. Pharmacological and non-pharmacological treatment of adults with ADHD: a meta-review. EVIDENCE-BASED MENTAL HEALTH 2017; 20:4-11. [PMID: 27993933 PMCID: PMC10699262 DOI: 10.1136/eb-2016-102415] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 11/20/2016] [Accepted: 11/25/2016] [Indexed: 12/14/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is characterised by a persistent and impairing pattern of inattention and/or hyperactivity/impulsivity and it is one of the most common neuropsychiatric conditions. Evidence about interventions of adults with ADHD is growing rapidly and clinicians need a reliable summary of all the best available information in order to better inform their daily practice. We searched MEDLINE, PubMed, PsycINFO and Cochrane databases until 31 May 2016 for systematic reviews about pharmacological and non-pharmacological treatments in adults with ADHD and carried out a meta-review to address clinically relevant questions. We identified a total of 40 papers. Psychostimulants-such as methylphenidate, dexamphetamine, mixed amphetamine salts and lisdexamfetamine-and non-psychostimulants-such as atomoxetine-were the most studied agents. Overall, pharmacological treatments were significantly more efficacious than placebo (standardised mean difference (SMD) 0.45, 95% CI 0.37 to 0.52), albeit less well accepted (OR 1.18, 95% CI 1.02 to 1.36) and tolerated (OR 2.29, 95% CI 1.97 to 2.66). The effects of pharmacological treatment for individuals with co-occurring ADHD and substance use disorder are still uncertain. The evidence for the efficacy and effectiveness of non-pharmacological treatments of ADHD in adults, as well as the combination of pharmacological and non-pharmacological strategies, is only preliminary. In conclusion, while available evidence addressed mainly the efficacy and tolerability of psychostimulants and non-psychostimulants for ADHD core symptoms in the short term, we still need further empirical support for the non-pharmacological and multimodal treatments. A comprehensive evidence-informed hierarchy of ADHD drugs based on their efficacy and tolerability is not yet available but it should be the next research priority in the field.
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Affiliation(s)
- Franco De Crescenzo
- Institute of Psychiatry and Psychology, Catholic University of Sacred Heart, Rome, Italy
| | - Samuele Cortese
- Department of Psychology, Developmental Brain-Behaviour Laboratory, University of Southampton, and Solent NHS Trust, Southampton, UK
- Langone Medical Center, New York University Child Study Center, New York City, New York, USA
| | - Nicoletta Adamo
- MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Luigi Janiri
- Institute of Psychiatry and Psychology, Catholic University of Sacred Heart, Rome, Italy
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Abstract
Psychotropic drugs, including antidepressants, antipsychotics, and anticonvulsants, all have negative effects on sexual function and semen quality. These adverse events vary among men and are less pronounced for some medications, allowing their effects to be managed to some extent. Use of specific serotonin reuptake inhibitors (SSRIs) is prevalent in men of reproductive age; and application to treat premature ejaculation increases the number of young men on SSRI therapy. Oxidative damage to sperm can result from prolonged residence in the male reproductive tract. The increase in ejaculatory latency seen with SSRIs likely underlies some of their negative effects on semen quality, including higher sperm DNA fragmentation, seen in all SSRIs evaluated thus far. These medications increase prolactin (PRL) levels in some men, and this is often credited with inhibitory effects on male reproduction; however, testosterone levels are generally normal, reducing the likelihood of direct HPG axis inhibition by PRL. The tricyclic antidepressants have also been shown to increase PRL levels in some studies but not in others. The exception is the tricyclic antidepressant clomipramine, which profoundly increases PRL levels and may depress semen quality. Other antidepressants modulating synaptic levels of serotonin, norepinephrine, and/or dopamine may have toxicity similar to SSRIs, but most have not been evaluated. In limited studies, norepinephrine-dopamine reuptake inhibitors (NDRIs) and serotonin agonist/reuptake inhibitors (SARIs) have had minimal effects on PRL levels and on sexual side effects. Antipsychotic medications increase PRL, decrease testosterone, and increase sexual side effects, including ejaculatory dysfunction. The greatest evidence is for chlorpromazine, haloperidol, reserpine, risperidone, and thioridazine, with less effects seen with aripiprazole and clozapine. Remarkably few studies have looked at antipsychotic effects on semen quality, and this is an important knowledge gap in reproductive pharmacology. Lithium increases PRL and LH levels and decreases testosterone although this is informed by few studies. The anticonvulsants, many used for other indications, generally decrease free or bioavailable testosterone with variable effects on the other reproductive hormones. Valproate, carbamazepine, oxcarbazepine, and levetiracetam decrease semen quality; other anticonvulsants have not been investigated for this adverse reaction. Studies are required evaluating endpoints of pregnancy and offspring health for psychotropic medications.
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Walker DJ, Mason O, Clemow DB, Day KA. Atomoxetine treatment in adults with attention-deficit/hyperactivity disorder. Postgrad Med 2015; 127:686-701. [PMID: 26343377 DOI: 10.1080/00325481.2015.1081046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is a CNS disorder that has its onset in childhood, but often persists into adulthood. There is growing recognition that adult ADHD can result in multiple negative consequences for individuals. ADHD is also often associated with a number of comorbid psychiatric disorders. Atomoxetine (ATX), a nonstimulant, selective noradrenergic reuptake inhibitor, was approved in the United States in 2002 for the treatment of ADHD in children and adolescents, as well as adults. We review here the safety and efficacy of ATX in adults with ADHD, including data in special populations, functional outcomes, as well as provider and patient real-world perceptions. METHODS We searched the databases Embase, MEDLINE and PsycINFO using the terms 'ADHD' and 'adult' and 'ATX' capturing publications from January 1, 1998, to March 27, 2014. Only publications in English were considered. RESULTS ATX demonstrated significantly greater improvement than placebo (PBO) on the Conners Adult ADHD Rating Scale-Investigator rated:Screening Version (CAARS-Inv:SV) in all trials (N = 6; total score difference ranged from -3.5 to -5.5). For long-term trials using the CAARS-Inv:SV, ATX demonstrated significantly greater improvement than PBO in three of four trials (total score differences ranged from -0.1 to -6.0). In short-term studies, ATX showed significantly greater improvement than PBO on the Adult ADHD Quality-of-Life scale total score in three of three studies, but results were mixed on the Sheehan Disability Scale. Three studies of ATX have reported statistically significant improvement (compared with PBO) on the Behavior Rating Inventory of Executive Function-Adult Version Self Report scale. The most common adverse events (occurring in ≥ 10% of patients taking ATX) were nausea, dry mouth, decreased appetite, insomnia and fatigue. CONCLUSIONS ATX is an important treatment option for the right patient. ATX can provide long-term, consistent symptom relief and functional improvement for adults with ADHD.
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Affiliation(s)
- Daniel J Walker
- a 1 Eli Lilly and Company, Lilly Corporate Center , Indianapolis, IN 46285, USA
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Upadhyaya H, Tanaka Y, Lipsius S, Kryzhanovskaya LA, Lane JR, Escobar R, Trzepacz PT, Allen AJ. Time-to-onset and -resolution of adverse events before/after atomoxetine discontinuation in adult patients with ADHD. Postgrad Med 2015; 127:677-85. [DOI: 10.1080/00325481.2015.1083394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Attention-deficit/hyperactivity disorder (ADHD) is a neurobiological condition of childhood onset with the hallmarks of inattention, impulsivity, and hyperactivity. Inattention includes excessive daydreaming, disorganization, and being easily distracted. Impulsivity manifests as taking an action before fully thinking of the consequences. Hyperactivity includes an excessive rate of speech and motor activity. Complications of ADHD include academic failure, low self-esteem, poor work performance, substance abuse, criminal justice issues, and social problems. ADHD is predominately due to decreased activity in the frontal lobe. Dopamine and norepinephrine are the main neurotransmitters involved in the pathophysiology of ADHD. Pharmacological treatment of ADHD includes psychostimulants, norepinephrine reuptake inhibitors, α2 agonists, bupropion, and monoamine oxidase inhibitors. The most effective medications are the psychostimulants. Nonpharmacological treatment of ADHD includes coaching, providing structure, academic accommodations, and work accommodations.
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Affiliation(s)
- Gyula Bokor
- Department of Psychiatry, Taunton State Hospital, Taunton, MA, USA
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Ma Y, Krueger JJ, Redmon SN, Uppuganti S, Nyman JS, Hahn MK, Elefteriou F. Extracellular norepinephrine clearance by the norepinephrine transporter is required for skeletal homeostasis. J Biol Chem 2013; 288:30105-30113. [PMID: 24005671 DOI: 10.1074/jbc.m113.481309] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Changes in bone remodeling induced by pharmacological and genetic manipulation of β-adrenergic receptor (βAR) signaling in osteoblasts support a role of sympathetic nerves in the regulation of bone remodeling. However, the contribution of endogenous sympathetic outflow and nerve-derived norepinephrine (NE) to bone remodeling under pathophysiological conditions remains unclear. We show here that differentiated osteoblasts, like neurons, express the norepinephrine transporter (NET), exhibit specific NE uptake activity via NET and can catabolize, but not generate, NE. Pharmacological blockade of NE transport by reboxetine induced bone loss in WT mice. Similarly, lack of NE reuptake in norepinephrine transporter (Net)-deficient mice led to reduced bone formation and increased bone resorption, resulting in suboptimal peak bone mass and mechanical properties associated with low sympathetic outflow and high plasma NE levels. Last, daily sympathetic activation induced by mild chronic stress was unable to induce bone loss, unless NET activity was blocked. These findings indicate that the control of endogenous NE release and reuptake by presynaptic neurons and osteoblasts is an important component of the complex homeostatic machinery by which the sympathetic nervous system controls bone remodeling. These findings also suggest that drugs antagonizing NET activity, used for the treatment of hyperactivity disorders, may have deleterious effects on bone accrual.
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Affiliation(s)
- Yun Ma
- From the Department of Medicine, Division of Clinical Pharmacology,; Vanderbilt Center for Bone Biology
| | | | - Sara N Redmon
- Department of Medicine, Division of Genetic Medicine
| | - Sasidhar Uppuganti
- Vanderbilt Center for Bone Biology,; the Department of Orthopaedic, Surgery and Rehabilitation
| | - Jeffry S Nyman
- Vanderbilt Center for Bone Biology,; the Department of Orthopaedic, Surgery and Rehabilitation,; Tennessee Valley Healthcare System, Department of Veterans Affairs, Nashville, Tennessee 37232
| | - Maureen K Hahn
- Department of Medicine, Division of Genetic Medicine,; Department of Pharmacology,; Vanderbilt Kennedy Center for Research on Human Development, and
| | - Florent Elefteriou
- From the Department of Medicine, Division of Clinical Pharmacology,; Vanderbilt Center for Bone Biology,; Department of Pharmacology,; Department of Cancer Biology,.
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