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Amorim MR, Wang X, Aung O, Bevans-Fonti S, Anokye-Danso F, Ribeiro C, Escobar J, Freire C, Pho H, Dergacheva O, Branco LGS, Ahima RS, Mendelowitz D, Polotsky VY. Leptin signaling in the dorsomedial hypothalamus couples breathing and metabolism in obesity. Cell Rep 2023; 42:113512. [PMID: 38039129 PMCID: PMC10804286 DOI: 10.1016/j.celrep.2023.113512] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 10/25/2023] [Accepted: 11/14/2023] [Indexed: 12/03/2023] Open
Abstract
Mismatch between CO2 production (Vco2) and respiration underlies the pathogenesis of obesity hypoventilation. Leptin-mediated CNS pathways stimulate both metabolism and breathing, but interactions between these functions remain elusive. We hypothesized that LEPRb+ neurons of the dorsomedial hypothalamus (DMH) regulate metabolism and breathing in obesity. In diet-induced obese LeprbCre mice, chemogenetic activation of LEPRb+ DMH neurons increases minute ventilation (Ve) during sleep, the hypercapnic ventilatory response, Vco2, and Ve/Vco2, indicating that breathing is stimulated out of proportion to metabolism. The effects of chemogenetic activation are abolished by a serotonin blocker. Optogenetic stimulation of the LEPRb+ DMH neurons evokes excitatory postsynaptic currents in downstream serotonergic neurons of the dorsal raphe (DR). Administration of retrograde AAV harboring Cre-dependent caspase to the DR deletes LEPRb+ DMH neurons and abolishes metabolic and respiratory responses to leptin. These findings indicate that LEPRb+ DMH neurons match breathing to metabolism through serotonergic pathways to prevent obesity-induced hypoventilation.
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Affiliation(s)
- Mateus R Amorim
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA; Department of Anesthesiology and Critical Care Medicine, George Washington University, Washington, DC 20037, USA.
| | - Xin Wang
- Department of Pharmacology and Physiology, George Washington University, Washington, DC 20037, USA
| | - O Aung
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Shannon Bevans-Fonti
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA; Department of Anesthesiology and Critical Care Medicine, George Washington University, Washington, DC 20037, USA
| | | | - Caitlin Ribeiro
- Department of Pharmacology and Physiology, George Washington University, Washington, DC 20037, USA
| | - Joan Escobar
- Department of Pharmacology and Physiology, George Washington University, Washington, DC 20037, USA
| | - Carla Freire
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Huy Pho
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Olga Dergacheva
- Department of Pharmacology and Physiology, George Washington University, Washington, DC 20037, USA
| | - Luiz G S Branco
- University of São Paulo, Ribeirão Preto, São Paulo 14040-904, Brazil
| | - Rexford S Ahima
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA
| | - David Mendelowitz
- Department of Pharmacology and Physiology, George Washington University, Washington, DC 20037, USA
| | - Vsevolod Y Polotsky
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA; Department of Anesthesiology and Critical Care Medicine, George Washington University, Washington, DC 20037, USA; Department of Pharmacology and Physiology, George Washington University, Washington, DC 20037, USA.
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Chandrakantan A, Musso MF, Floyd T, Adler AC. Pediatric obstructive sleep apnea: Preoperative and neurocognitive considerations for perioperative management. Paediatr Anaesth 2020; 30:529-536. [PMID: 32163644 DOI: 10.1111/pan.13855] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 03/02/2020] [Accepted: 03/08/2020] [Indexed: 02/06/2023]
Abstract
Obstructive sleep apnea (OSA) affects up to 7.5% of the pediatric population and is associated with a variety of behavioral and neurocognitive sequelae. Prompt diagnosis and treatment is critical to halting and potentially reversing these changes. Depending on the severity of the OSA and comorbid conditions, different treatment paradigms can be pursued, each of which has its own unique risk:benefit ratio. Adenotonsillectomy is first-line recommended surgical treatment for pediatric OSA. However, it carries its own perioperative risks and the decision regarding surgical timing is therefore made in the context of procedural risk versus patient benefit. This article presents the seminal perioperative and neurocognitive risks from pediatric OSA to aid with perioperative management.
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Affiliation(s)
- Arvind Chandrakantan
- Department of Anesthesiology, Perioperative and Pain Medicine, Texas Children's Hospital, Houston, TX, USA.,Baylor College of Medicine, Houston, TX, USA
| | - Mary F Musso
- Baylor College of Medicine, Houston, TX, USA.,Department of Otorhinolaryngology, Texas Children's Hospital, Houston, TX, USA
| | - Thomas Floyd
- Department of Anesthesiology and Pain Management, University of Texas Southwestern, Dallas, TX, USA.,Department of Cardiothoracic Surgery, University of Texas Southwestern, Dallas, TX, USA.,Department of Radiology, University of Texas Southwestern, Dallas, TX, USA
| | - Adam C Adler
- Department of Anesthesiology, Perioperative and Pain Medicine, Texas Children's Hospital, Houston, TX, USA.,Baylor College of Medicine, Houston, TX, USA
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Norman MB, Harrison HC, Waters KA, Sullivan CE. Snoring and stertor are associated with more sleep disturbance than apneas and hypopneas in pediatric SDB. Sleep Breath 2019; 23:1245-1254. [PMID: 30825066 PMCID: PMC6868107 DOI: 10.1007/s11325-019-01809-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/26/2019] [Accepted: 02/19/2019] [Indexed: 11/30/2022]
Abstract
PURPOSE Polysomnography is not recommended for children at home and does not adequately capture partial upper airway obstruction (snoring and stertor), the dominant pathology in pediatric sleep-disordered breathing. New methods are required for assessment. Aims were to assess sleep disruption linked to partial upper airway obstruction and to evaluate unattended Sonomat use in a large group of children at home. METHODS Children with suspected obstructive sleep apnea (OSA) had a single home-based Sonomat recording (n = 231). Quantification of breath sound recordings allowed identification of snoring, stertor, and apneas/hypopneas. Movement signals were used to measure quiescent (sleep) time and sleep disruption. RESULTS Successful recordings occurred in 213 (92%) and 113 (53%) had no OSA whereas only 11 (5%) had no partial obstruction. Snore/stertor occurred more frequently (15.3 [5.4, 30.1] events/h) and for a longer total duration (69.9 min [15.7, 140.9]) than obstructive/mixed apneas and hypopneas (0.8 [0.0, 4.7] events/h, 1.2 min [0.0, 8.5]); both p < 0.0001. Many non-OSA children had more partial obstruction than those with OSA. Most intervals between snore and stertor runs were < 60 s (79% and 61% respectively), indicating that they occur in clusters. Of 14,145 respiratory-induced movement arousals, 70% were preceded by runs of snore/stertor with the remainder associated with apneas/hypopneas. CONCLUSIONS Runs of snoring and stertor occur much more frequently than obstructive apneas/hypopneas and are associated with a greater degree of sleep disruption. Children with and without OSA are frequently indistinguishable regarding the amount, frequency, and the degree of sleep disturbance caused by snoring and stertor.
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Affiliation(s)
- Mark B Norman
- Discipline of Sleep Medicine, University of Sydney, Level 4, Chris O'Brien Lifehouse, 119-142 Missenden Road, Camperdown, NSW, 2050, Australia.
| | - Henley C Harrison
- Ear, Nose and Throat Department, Sydney Children's Hospital, Sydney, Australia
| | - Karen A Waters
- Discipline of Sleep Medicine, University of Sydney, Level 4, Chris O'Brien Lifehouse, 119-142 Missenden Road, Camperdown, NSW, 2050, Australia
- David Read Sleep Laboratory, The Children's Hospital at Westmead, Westmead, NSW, Australia
| | - Colin E Sullivan
- Discipline of Sleep Medicine, University of Sydney, Level 4, Chris O'Brien Lifehouse, 119-142 Missenden Road, Camperdown, NSW, 2050, Australia
- David Read Sleep Laboratory, The Children's Hospital at Westmead, Westmead, NSW, Australia
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Birnkrant DJ, Black JB, Tapia IE, Nicolai T, Gower WA, Noah TL. Pediatric Pulmonology year in review 2016: Part 1. Pediatr Pulmonol 2017; 52:1226-1233. [PMID: 28440921 DOI: 10.1002/ppul.23720] [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: 03/21/2017] [Accepted: 04/04/2017] [Indexed: 11/07/2022]
Abstract
Pediatric Pulmonology continues to publish research and clinical topics related to the entire range of children's respiratory disorders. As we have done annually in recent years, we here summarize the past year's publications in our major topic areas, as well as selected literature in these areas from other core journals relevant to our discipline. This review (Part 1) covers selected articles on sleep, diagnostic testing/endoscopy, respiratory complications of neuromuscular disorders, and rare lung diseases.
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Affiliation(s)
- David J Birnkrant
- Metro Health Medical Center, Cleveland, Ohio.,Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Jane B Black
- Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Ignacio E Tapia
- Sleep Center, Division of Pulmonary Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | | | - William A Gower
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Terry L Noah
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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Joosten KF, Larramona H, Miano S, Van Waardenburg D, Kaditis AG, Vandenbussche N, Ersu R. How do we recognize the child with OSAS? Pediatr Pulmonol 2017; 52:260-271. [PMID: 27865065 DOI: 10.1002/ppul.23639] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 10/12/2016] [Accepted: 10/30/2016] [Indexed: 12/29/2022]
Abstract
Obstructive sleep-disordered breathing includes a spectrum of clinical entities with variable severity ranging from primary snoring to obstructive sleep apnea syndrome (OSAS). The clinical suspicion for OSAS is most often raised by parental report of specific symptoms and/or abnormalities identified by the physical examination which predispose to upper airway obstruction (e.g., adenotonsillar hypertrophy, obesity, craniofacial abnormalities, neuromuscular disorders). Symptoms and signs of OSAS are classified into those directly related to the intermittent pharyngeal airway obstruction (e.g., parental report of snoring, apneic events) and into morbidity resulting from the upper airway obstruction (e.g., increased daytime sleepiness, hyperactivity, poor school performance, inadequate somatic growth rate or enuresis). History of premature birth and a family history of OSAS as well as obesity and African American ethnicity are associated with increased risk of sleep-disordered breathing in childhood. Polysomnography is the gold standard method for the diagnosis of OSAS but may not be always feasible, especially in low-income countries or non-tertiary hospitals. Nocturnal oximetry and/or sleep questionnaires may be used to identify the child at high risk of OSAS when polysomnography is not an option. Endoscopy and MRI of the upper airway may help to identify the level(s) of upper airway obstruction and to evaluate the dynamic mechanics of the upper airway, especially in children with combined abnormalities. Pediatr Pulmonol. 2017;52:260-271. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Koen F Joosten
- Erasmus MC, Pediatric Intensive Care, Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Helena Larramona
- Paediatric Pulmonology Unit, Department of Pediatrics, University Autonoma of Barcelona, Corporacio Sanitaria Parc Tauli, Hospital of Sabadell, Barcelona, Spain
| | - Silvia Miano
- Sleep and Epilepsy Centre, Neurocentre of Southern Switzerland, Civic Hospital of Lugano, Lugano, Switzerland
| | - Dick Van Waardenburg
- Pediatric Intensive Care Unit, Department of Pediatrics, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Athanasios G Kaditis
- Pediatric Pulmonology Unit, First Department of Paediatrics, National and Kapodistrian University of Athens School of Medicine and Aghia Sophia Children's Hospital, Athens, Greece
| | | | - Refika Ersu
- Division of Pediatric Pulmonology, Marmara University, Istanbul, Turkey
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The Status of Pediatric Obstructive Sleep Apnea in 2015: Progress? YES!! More Questions? Definitely YES!! CURRENT SLEEP MEDICINE REPORTS 2016. [DOI: 10.1007/s40675-016-0033-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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