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Giunta S, Xia S, Pelliccioni G, Olivieri F. Autonomic nervous system imbalance during aging contributes to impair endogenous anti-inflammaging strategies. GeroScience 2024; 46:113-127. [PMID: 37821752 PMCID: PMC10828245 DOI: 10.1007/s11357-023-00947-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/13/2023] [Indexed: 10/13/2023] Open
Abstract
Inflammaging refers to the age-related low grade, sterile, chronic, systemic, and long-lasting subclinical, proinflammatory status, currently recognized as the main risk factor for development and progression of the most common age-related diseases (ARDs). Extensive investigations were focused on a plethora of proinflammatory stimuli that can fuel inflammaging, underestimating and partly neglecting important endogenous anti-inflammaging mechanisms that could play a crucial role in such age-related proinflammatory state. Studies on autonomic nervous system (ANS) functions during aging highlighted an imbalance toward an overactive sympathetic nervous system (SNS) tone, promoting proinflammatory conditions, and a diminished parasympathetic nervous system (PNS) activity, playing anti-inflammatory effects mediated by the so called cholinergic anti-inflammatory pathway (CAP). At the molecular level, CAP is characterized by signals communicated via the vagus nerve (with the possible involvement of the splenic nerves) through acetylcholine release to downregulate the inflammatory actions of macrophages, key players of inflammaging. Notably, decreased vagal function and increased burden of activated/senescent macrophages (macrophaging) probably precede the development of several age-related risk factors and diseases, while increased vagal function and reduced macrophaging could be associated with relevant reduction of risk profiles. Hypothalamic-pituitary-adrenal axis (HPA axis) is another pathway related to ANS promoting some anti-inflammatory response mainly through increased cortisol levels. In this perspective review, we highlighted that CAP and HPA, representing broadly "anti-inflammaging" mechanisms, have a reduced efficacy and lose effectiveness in aged people, a phenomenon that could contribute to fuel inflammaging. In this framework, strategies aimed to re-balance PNS/SNS activities could be explored to modulate systemic inflammaging especially at an early subclinical stage, thus increasing the chances to reach the extreme limit of human lifespan in healthy status.
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Affiliation(s)
- Sergio Giunta
- Casa Di Cura Prof. Nobili (Gruppo Garofalo (GHC)), Castiglione Dei Pepoli, Bologna, Italy
| | - Shijin Xia
- Department of Geriatrics, Shanghai Institute of Geriatrics, Huadong Hospital, Fudan University, Shanghai, China
| | | | - Fabiola Olivieri
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica Delle Marche, Via Tronto 10/A, 60126, Ancona, Italy.
- Clinical Laboratory and Molecular Diagnostic, IRCCS INRCA, Ancona, Italy.
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2
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Farrell G, Reily-Bell M, Chapple C, Kennedy E, Sampath K, Gisselman AS, Cook C, Katare R, Tumilty S. Autonomic nervous system and endocrine system response to upper and lower cervical spine mobilization in healthy male adults: a randomized crossover trial. J Man Manip Ther 2023; 31:421-434. [PMID: 36794952 PMCID: PMC10642313 DOI: 10.1080/10669817.2023.2177071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 01/26/2023] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND Cervical spine mobilizations may differentially modulate both components of the stress response, consisting of the autonomic nervous system and hypothalamic pituitary adrenal-axis, depending on whether the target location is the upper or lower cervical spine. To date, no study has investigated this. METHODS A randomized, crossover trial investigated the effects of upper versus lower cervical mobilization on both components of the stress response simultaneously. The primary outcome was salivary cortisol (sCOR) concentration. The secondary outcome was heart rate variability measured with a smartphone application. Twenty healthy males, aged 21-35, were included. Participants were randomly assigned to block-AB (upper then lower cervical mobilization, n = 10) or block-BA (lower than upper cervical mobilization, n = 10), separated by a one-week washout period. All interventions were performed in the same room (University clinic) under controlled conditions. Statistical analyses were performed with a Friedman's Two-Way ANOVA and Wilcoxon Signed Rank Test. RESULTS Within groups, sCOR concentration reduced thirty-minutes following lower cervical mobilization (p = 0.049). Between groups, sCOR concentration was different at thirty-minutes following the intervention (p = 0.018). CONCLUSION There was a statistically significant reduction in sCOR concentration following lower cervical spine mobilization, and between-group difference, 30 min following the intervention. This indicates that mobilizations applied to separate target locations within the cervical spine can differentially modulate the stress response.
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Affiliation(s)
- Gerard Farrell
- Centre for Health, Activity, and Rehabilitation Research, School of Physiotherapy, North Dunedin, New Zealand
| | - Matthew Reily-Bell
- Department of Physiology, HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Cathy Chapple
- Centre for Health, Activity, and Rehabilitation Research, School of Physiotherapy, North Dunedin, New Zealand
| | - Ewan Kennedy
- Centre for Health, Activity, and Rehabilitation Research, School of Physiotherapy, North Dunedin, New Zealand
| | - Kesava Sampath
- Centre for Health and Social Practice, Waikato Institute of Technology-Rotokauri Campus, Hamilton, Waikato, New Zealand
| | | | - Chad Cook
- Doctor of Physical Therapy Program, Duke University, Durham, North Carolina, USA
| | - Rajesh Katare
- Department of Physiology, HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Steve Tumilty
- Centre for Health, Activity, and Rehabilitation Research, School of Physiotherapy, North Dunedin, New Zealand
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Pandher PK, Rahim Y, Timms KP, Filatov E, Short LI, Gray SL. Reference gene recommendations and PACAP receptor expression in murine sympathetic ganglia of the autonomic nervous system that innervate adipose tissues after chronic cold exposure. J Neuroendocrinol 2023; 35:e13313. [PMID: 37404042 DOI: 10.1111/jne.13313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 06/01/2023] [Accepted: 06/04/2023] [Indexed: 07/06/2023]
Abstract
Pituitary adenylate cyclase-activating polypeptide (PACAP) is an important regulator of the stress response in mammals, influencing both the hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system (SNS). PACAP has been reported to influence energy homeostasis, including adaptive thermogenesis, an energy burning process in adipose tissue regulated by the SNS in response to cold stress and overfeeding. While research suggests PACAP acts centrally at the level of the hypothalamus, knowledge of PACAP's role within the sympathetic nerves innervating adipose tissues in response to metabolic stressors is limited. This work shows, for the first time, gene expression of PACAP receptors in stellate ganglia and highlights some differential expression with housing temperature. Additionally, we present our dissection protocol, analysis of tyrosine hydroxylase gene expression as a molecular biomarker for catecholamine producing tissue and recommend three stable reference genes for the normalization of quantitative real time-polymerase chain reaction (qRT-PCR) data when working with this tissue. This study adds to information about neuropeptide receptor expression in peripheral ganglia of the sympathetic nervous system innervating adipose tissue and provides insight into PACAP's role in the regulation of energy metabolism.
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Affiliation(s)
- Parleen K Pandher
- Northern Medical Program, Division of Medical Sciences, University of Northern British Columbia, Prince George, British Columbia, Canada
| | - Yamna Rahim
- Northern Medical Program, Division of Medical Sciences, University of Northern British Columbia, Prince George, British Columbia, Canada
| | - Katherine P Timms
- Northern Medical Program, Division of Medical Sciences, University of Northern British Columbia, Prince George, British Columbia, Canada
| | - Ekaterina Filatov
- Northern Medical Program, Division of Medical Sciences, University of Northern British Columbia, Prince George, British Columbia, Canada
| | - Landon I Short
- Northern Medical Program, Division of Medical Sciences, University of Northern British Columbia, Prince George, British Columbia, Canada
| | - Sarah L Gray
- Northern Medical Program, Division of Medical Sciences, University of Northern British Columbia, Prince George, British Columbia, Canada
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Mohammadian M, Golchoobian R. Potential autonomic nervous system dysfunction in COVID-19 patients detected by heart rate variability is a sign of SARS-CoV-2 neurotropic features. Mol Biol Rep 2022; 49:8131-8137. [PMID: 35810238 DOI: 10.1007/s11033-022-07486-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/09/2022] [Accepted: 04/14/2022] [Indexed: 11/26/2022]
Abstract
Increasing evidence strongly support that the newly identified severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) leads to the development of COVID-19-associated central nervous system (CNS) manifestations. The presence of SARS-CoV-2 viral protein in the brainstem, which includes cardiovascular control centers, has been documented previously. Given the changes in autonomic nervous system function evaluated by heart rate variability (HRV) metrics, which are observed even prior to clinical signs, the potential effect of SARS-CoV-2 on the autonomic nervous system (ANS) center is likely. The integral parts of the brain renin-angiotensin system, as ACE2 enzyme, are highly expressed in the brainstem, which may also be involved in baroreflex sensitivity, playing an important role in HRV. SARS-CoV-2 may bind to ACE2 in order to enter the host brainstem cell and change baroreflex sensitivity due to the altered ratio of the concentration of angiotensin II (Ag II) to angiotensin (1-7). In this article, we discussed the information on the possibility that the SARS-CoV-2 viral particle by disrupting the homeostasis of the brain renin-angiotensin system even without brainstem neuropathological changes, may affect the function of the ANS center in the brainstem. SARS-CoV-2 could influence ANS function before affecting the immune system. It is possible that the altered HRV parameters imply the potential neurotropic characteristics of SARS-CoV-2. Therefore, this potential feature should be taken into account in diagnostic and therapeutic approaches for COVID-19 patients.
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Affiliation(s)
- Maryame Mohammadian
- Department of Physiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ravieh Golchoobian
- Department of Physiology, School of Medicine, Babol University of Medical Sciences, Babol, Iran.
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Abstract
Aging is the greatest independent risk factor for developing hypertension and cardiovascular-related diseases including systolic hypertension, vascular disease, ischemic events, arrhythmias, and heart failure. Age-related cardiovascular risk is associated with dysfunction of peripheral organ systems, such as the heart and vasculature, as well as an imbalance in the autonomic nervous system characterized by increased sympathetic and decreased parasympathetic neurotransmission. Given the increasing prevalence of aged individuals worldwide, it is critical to better understand mechanisms contributing to impaired cardiovascular autonomic control in this population. In this regard, the renin-angiotensin system has emerged as an important hormonal modulator of cardiovascular function in aging, in part through modulation of autonomic pathways controlling sympathetic and parasympathetic outflow to cardiovascular end organs. This review will summarize the role of the RAS in cardiovascular autonomic control during aging, with a focus on current knowledge of angiotensin II versus angiotensin-(1-7) pathways in both rodent models and humans, pharmacological treatment strategies targeting the renin-angiotensin system, and unanswered questions for future research.
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Affiliation(s)
- Amanda J Miller
- Department of Neural and Behavioral Sciences, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Amy C Arnold
- Department of Neural and Behavioral Sciences, Pennsylvania State University College of Medicine, Hershey, PA, USA.
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Abstract
Nesfatin-1, an 82-amino acid polypeptide derived from the precursor protein nucleobindin-2 (NUCB2), was first discovered in 2006 in the rat hypothalamus. The effects and distribution of nesfatin-1 immunopositive neurons in the brain and spinal cord point towards a role of NUCB2/nesfatin-1 in autonomic regulation. Therefore, studies which have been conducted to investigate the interplay between nesfatin-1 and the autonomic nervous system were examined, and the outcomes of this research were summarized. NUCB2/nesfatin-1 immunoreactivity is widely distributed in autonomic centers of the brain and spinal cord in both rodents and humans. In several regions of the hypothalamus, midbrain and brainstem, nesfatin-1 modulates autonomic functions. On the other hand, the autonomic nervous system also influences the activity of nesfatin-1 neurons. Here, the vagus nerve seems to be a crucial factor in the regulation of nesfatin-1. In summary, although data here is still sparse, there is a clear interplay between nesfatin-1 and the autonomic nervous system, the precise clarification of which still requires further research to gain more insight into these complex relationships.
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Affiliation(s)
- Sophia Kristina Rupp
- Department of Psychosomatic Medicine and Psychotherapy, University Hospital Tübingen, Tübingen, Germany
| | - Andreas Stengel
- Department of Psychosomatic Medicine and Psychotherapy, University Hospital Tübingen, Tübingen, Germany; Charité Center for Internal Medicine and Dermatology, Department for Psychosomatic Medicine, Germany; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany.
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Moullé VS. Autonomic control of pancreatic beta cells: What is known on the regulation of insulin secretion and beta-cell proliferation in rodents and humans. Peptides 2022; 148:170709. [PMID: 34896576 DOI: 10.1016/j.peptides.2021.170709] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 11/17/2021] [Accepted: 12/07/2021] [Indexed: 11/21/2022]
Abstract
Insulin secretion and pancreatic beta-cell proliferation are tightly regulated by several signals such as hormones, nutrients, and neurotransmitters. However, the autonomic control of beta cells is not fully understood. In this review, we describe mechanisms involved in insulin secretion as well as metabolic and mitogenic actions on its target tissues. Since pancreatic islets are physically connected to the brain by nerves, parasympathetic and sympathetic neurotransmitters can directly potentiate or repress insulin secretion and beta-cell proliferation. Finally, we highlight the role of the autonomic nervous system in metabolic diseases such as diabetes and obesity.
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Yuan PQ, Wu SV, Stengel A, Sato K, Taché Y. Activation of CRF 1 receptors expressed in brainstem autonomic nuclei stimulates colonic enteric neurons and secreto-motor function in male rats. Neurogastroenterol Motil 2021; 33:e14189. [PMID: 34215021 DOI: 10.1111/nmo.14189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/13/2021] [Accepted: 05/04/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND Hypothalamic corticotropin-releasing factor (CRF) receptor 1 (CRF1 ) plays a role in acute stress-related stimulation of colonic motor function. Less is known on CRF1 signaling in the brainstem. METHODS We investigate CRF1 expression in the brainstem and the colonic response to 4th ventricle (4V) injection of CRF and urocortin (Ucn) 2 (3 µg/rat) in chronically cannulated male rats. KEY RESULTS Transcripts of CRF1 wild-type 1a and splice variants 1c, 1e, 1f, 1o along with three novel variants 1a-2 (desK-110 in exon 5), 1p (-exon 7), and 1q (exon 5 extension) were identified in the pons and medulla. The area postrema, nucleus tractus solitarius, dorsal motor nucleus of the vagus, locus coeruleus, and Barrington's nucleus isolated by laser capture microdissection expressed 1a, 1a-2, and 1p but not 1q. Compared to 4V vehicle, 4V CRF induced fecal pellet output (FPO) and diarrhea that were blocked by the CRF antagonist, astressin-B. CRF2 agonist, Ucn2 had no effect on basal or CRF-induced FPO. CRF actions were correlated with the induction of c-Fos immunoreactivity in myenteric neurons of the proximal and distal colon (pC, dC) and submucosal neurons of dC. c-Fos immunoreactivity occurred in 39% and 37% of myenteric cholinergic and 7% and 58% of nitrergic neurons in the pC and dC, respectively. CONCLUSIONS & INFERENCES CRF1a and its splice variants are expressed in brainstem nuclei, and activation of CRF1 signaling at the level of the brainstem stimulates colonic secretory-motor function through activation of colonic enteric neurons.
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Affiliation(s)
- Pu-Qing Yuan
- David Geffen School of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, University of California at Los Angeles (UCLA), Los Angeles, CA, USA
- VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA
| | - S Vincent Wu
- VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA
| | - Andreas Stengel
- David Geffen School of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, University of California at Los Angeles (UCLA), Los Angeles, CA, USA
- Department of Psychosomatic Medicine and Psychotherapy, Medical University Hospital, Tübingen, Germany
- Department for Psychosomatic Medicine, Charité Center for Internal Medicine and Dermatology, Charité-Universitätsmedizin, Berlin, Germany
| | - Ken Sato
- David Geffen School of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, University of California at Los Angeles (UCLA), Los Angeles, CA, USA
- Sato Clinic 13-14 Choei Moriyamaku, Nagoya City, Japan
| | - Yvette Taché
- David Geffen School of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, University of California at Los Angeles (UCLA), Los Angeles, CA, USA
- VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA
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Büki A, Kekesi G, Horvath G, Vécsei L. A Potential Interface between the Kynurenine Pathway and Autonomic Imbalance in Schizophrenia. Int J Mol Sci 2021; 22:10016. [PMID: 34576179 PMCID: PMC8467675 DOI: 10.3390/ijms221810016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 02/07/2023] Open
Abstract
Schizophrenia is a neuropsychiatric disorder characterized by various symptoms including autonomic imbalance. These disturbances involve almost all autonomic functions and might contribute to poor medication compliance, worsened quality of life and increased mortality. Therefore, it has a great importance to find a potential therapeutic solution to improve the autonomic disturbances. The altered level of kynurenines (e.g., kynurenic acid), as tryptophan metabolites, is almost the most consistently found biochemical abnormality in schizophrenia. Kynurenic acid influences different types of receptors, most of them involved in the pathophysiology of schizophrenia. Only few data suggest that kynurenines might have effects on multiple autonomic functions. Publications so far have discussed the implication of kynurenines and the alteration of the autonomic nervous system in schizophrenia independently from each other. Thus, the coupling between them has not yet been addressed in schizophrenia, although their direct common points, potential interfaces indicate the consideration of their interaction. The present review gathers autonomic disturbances, the impaired kynurenine pathway in schizophrenia, and the effects of kynurenine pathway on autonomic functions. In the last part of the review, the potential interaction between the two systems in schizophrenia, and the possible therapeutic options are discussed.
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Affiliation(s)
- Alexandra Büki
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10., H-6720 Szeged, Hungary; (A.B.); (G.K.); (G.H.)
| | - Gabriella Kekesi
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10., H-6720 Szeged, Hungary; (A.B.); (G.K.); (G.H.)
| | - Gyongyi Horvath
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10., H-6720 Szeged, Hungary; (A.B.); (G.K.); (G.H.)
| | - László Vécsei
- Department of Neurology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis u. 6., H-6725 Szeged, Hungary
- MTA-SZTE Neuroscience Research Group, H-6725 Szeged, Hungary
- Interdisciplinary Excellence Center, Department of Neurology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis u. 6., H-6725 Szeged, Hungary
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Van Den Berge N, Ferreira N, Mikkelsen TW, Alstrup AKO, Tamgüney G, Karlsson P, Terkelsen AJ, Nyengaard JR, Jensen PH, Borghammer P. Ageing promotes pathological alpha-synuclein propagation and autonomic dysfunction in wild-type rats. Brain 2021; 144:1853-1868. [PMID: 33880502 PMCID: PMC8320301 DOI: 10.1093/brain/awab061] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 11/13/2020] [Accepted: 12/10/2020] [Indexed: 12/16/2022] Open
Abstract
Neuronal aggregates of misfolded alpha-synuclein protein are found in the brain and periphery of patients with Parkinson's disease. Braak and colleagues have hypothesized that the initial formation of misfolded alpha-synuclein may start in the gut, and then spread to the brain via peripheral autonomic nerves hereby affecting several organs, including the heart and intestine. Age is considered the greatest risk factor for Parkinson's disease, but the effect of age on the formation of pathology and its propagation has not been studied in detail. We aimed to investigate whether propagation of alpha-synuclein pathology from the gut to the brain is more efficient in old versus young wild-type rats, upon gastrointestinal injection of aggregated alpha-synuclein. Our results demonstrate a robust age-dependent gut-to-brain and brain-to-gut spread of alpha-synuclein pathology along the sympathetic and parasympathetic nerves, resulting in age-dependent dysfunction of the heart and stomach, as observed in patients with Parkinson's disease. Moreover, alpha-synuclein pathology is more densely packed and resistant to enzymatic digestion in old rats, indicating an age-dependent maturation of alpha-synuclein aggregates. Our study is the first to provide a detailed investigation of alpha-synuclein pathology in several organs within one animal model, including the brain, skin, heart, intestine, spinal cord and autonomic ganglia. Taken together, our findings suggest that age is a crucial factor for alpha-synuclein aggregation and complete propagation to heart, stomach and skin, similar to patients. Given that age is the greatest risk factor for human Parkinson's disease, it seems likely that older experimental animals will yield the most relevant and reliable findings. These results have important implications for future research to optimize diagnostics and therapeutics in Parkinson's disease and other age-associated synucleinopathies. Increased emphasis should be placed on using aged animals in preclinical studies and to elucidate the nature of age-dependent interactions.
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Affiliation(s)
- Nathalie Van Den Berge
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
| | - Nelson Ferreira
- DANDRITE-Danish Research Institute of Translational Neuroscience and Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Aage Kristian Olsen Alstrup
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
| | - Gültekin Tamgüney
- Institute of Physical Biology, Heinrich-Heine-University, Düsseldorf, Germany
- Institute of Biological Information Processing, Structural Biochemistry (IBI-7), Forschungszentrum Jülich, Jülich, Germany
| | - Páll Karlsson
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Clinical Medicine, The Danish Pain Research Center, Aarhus University, Aarhus, Denmark
- Core Center for Molecular Morphology, Section for Stereology and Microscopy, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Astrid Juhl Terkelsen
- Department of Clinical Medicine, The Danish Pain Research Center, Aarhus University, Aarhus, Denmark
- Department of Neurology, Aarhus University Hospital, Aarhus, Denmark
| | - Jens Randel Nyengaard
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Core Center for Molecular Morphology, Section for Stereology and Microscopy, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Center for Stochastic Geometry and Advanced Bioimaging, Aarhus University, Aarhus, Denmark
| | - Poul Henning Jensen
- DANDRITE-Danish Research Institute of Translational Neuroscience and Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Per Borghammer
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Nuclear Medicine and PET, Aarhus University Hospital, Aarhus, Denmark
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Prajapati V, Guha R, Routray A. Multimodal prediction of trait emotional intelligence-Through affective changes measured using non-contact based physiological measures. PLoS One 2021; 16:e0254335. [PMID: 34242354 PMCID: PMC8270480 DOI: 10.1371/journal.pone.0254335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/25/2021] [Indexed: 11/19/2022] Open
Abstract
Inability to efficiently deal with emotionally laden situations, often leads to poor interpersonal interactions. This adversely affects the individual's psychological functioning. A higher trait emotional intelligence (EI) is not only associated with psychological wellbeing, educational attainment, and job-related success, but also with willingness to seek professional and non-professional help for personal-emotional problems, depression and suicidal ideation. Thus, it is important to identify low (EI) individuals who are more prone to mental health problems than their high EI counterparts, and give them the appropriate EI training, which will aid in preventing the onset of various mood related disorders. Since people may be unaware of their level of EI/emotional skills or may tend to fake responses in self-report questionnaires in high stake situations, a system that assesses EI using physiological measures can prove affective. We present a multimodal method for detecting the level of trait Emotional intelligence using non-contact based autonomic sensors. To our knowledge, this is the first work to predict emotional intelligence level from physiological/autonomic (cardiac and respiratory) response patterns to emotions. Trait EI of 50 users was measured using Schutte Self Report Emotional Intelligence Test (SSEIT) along with their cardiovascular and respiratory data, which was recorded using FMCW radar sensor both at baseline and while viewing affective movie clips. We first examine relationships between users' Trait EI scores and autonomic response and reactivity to the clips. Our analysis suggests a significant relationship between EI and autonomic response and reactivity. We finally attempt binary EI level detection using linear SVM. We also attempt to classify each sub factor of EI, namely-perception of emotion, managing own emotions, managing other's emotions, and utilization of emotions. The proposed method achieves an EI classification accuracy of 84%, while accuracies ranging from 58 to 76% is achieved for recognition of the sub factors. This is the first step towards identifying EI of an individual purely through physiological responses. Limitation and future directions are discussed.
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Affiliation(s)
- Vrinda Prajapati
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
| | - Rajlakshmi Guha
- Centre for Education Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
| | - Aurobinda Routray
- Department of Electrical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
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Tanaka M, Yamada S, Watanabe Y. The Role of Neuropeptide Y in the Nucleus Accumbens. Int J Mol Sci 2021; 22:ijms22147287. [PMID: 34298907 PMCID: PMC8307209 DOI: 10.3390/ijms22147287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/02/2021] [Accepted: 07/05/2021] [Indexed: 12/22/2022] Open
Abstract
Neuropeptide Y (NPY), an abundant peptide in the central nervous system, is expressed in neurons of various regions throughout the brain. The physiological and behavioral effects of NPY are mainly mediated through Y1, Y2, and Y5 receptor subtypes, which are expressed in regions regulating food intake, fear and anxiety, learning and memory, depression, and posttraumatic stress. In particular, the nucleus accumbens (NAc) has one of the highest NPY concentrations in the brain. In this review, we summarize the role of NPY in the NAc. NPY is expressed principally in medium-sized aspiny neurons, and numerous NPY immunoreactive fibers are observed in the NAc. Alterations in NPY expression under certain conditions through intra-NAc injections of NPY or receptor agonists/antagonists revealed NPY to be involved in the characteristic functions of the NAc, such as alcohol intake and drug addiction. In addition, control of mesolimbic dopaminergic release via NPY receptors may take part in these functions. NPY in the NAc also participates in fat intake and emotional behavior. Accumbal NPY neurons and fibers may exert physiological and pathophysiological actions partly through neuroendocrine mechanisms and the autonomic nervous system.
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Affiliation(s)
- Masaki Tanaka
- Department of Anatomy, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamikyo-ku, Kyoto 602-8566, Japan;
- Correspondence: ; Tel.: +81-75-251-5300
| | - Shunji Yamada
- Department of Anatomy, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamikyo-ku, Kyoto 602-8566, Japan;
| | - Yoshihisa Watanabe
- Department of Basic Geriatrics, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamikyo-ku, Kyoto 602-8566, Japan;
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Abstract
The carotid body (CB) is the main peripheral chemoreceptor for arterial respiratory gases O2 and CO2 and pH, eliciting reflex ventilatory, cardiovascular, and humoral responses to maintain homeostasis. This review examines the fundamental biology underlying CB chemoreceptor function, its contribution to integrated physiological responses, and its role in maintaining health and potentiating disease. Emphasis is placed on 1) transduction mechanisms in chemoreceptor (type I) cells, highlighting the role played by the hypoxic inhibition of O2-dependent K+ channels and mitochondrial oxidative metabolism, and their modification by intracellular molecules and other ion channels; 2) synaptic mechanisms linking type I cells and petrosal nerve terminals, focusing on the role played by the main proposed transmitters and modulatory gases, and the participation of glial cells in regulation of the chemosensory process; 3) integrated reflex responses to CB activation, emphasizing that the responses differ dramatically depending on the nature of the physiological, pathological, or environmental challenges, and the interactions of the chemoreceptor reflex with other reflexes in optimizing oxygen delivery to the tissues; and 4) the contribution of enhanced CB chemosensory discharge to autonomic and cardiorespiratory pathophysiology in obstructive sleep apnea, congestive heart failure, resistant hypertension, and metabolic diseases and how modulation of enhanced CB reactivity in disease conditions may attenuate pathophysiology.
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Affiliation(s)
- Rodrigo Iturriaga
- Laboratorio de Neurobiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile, and Centro de Excelencia en Biomedicina de Magallanes, Universidad de Magallanes, Punta Arenas, Chile
| | - Julio Alcayaga
- Laboratorio de Fisiología Celular, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Mark W Chapleau
- Department of Internal Medicine, University of Iowa and Department of Veterans Affairs Medical Center, Iowa City, Iowa
| | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
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14
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Grotle AK, Huo Y, Harrison ML, Ybarbo KM, Stone AJ. GsMTx-4 normalizes the exercise pressor reflex evoked by intermittent muscle contraction in early stage type 1 diabetic rats. Am J Physiol Heart Circ Physiol 2021; 320:H1738-H1748. [PMID: 33635166 DOI: 10.1152/ajpheart.00794.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 02/24/2021] [Indexed: 01/08/2023]
Abstract
Emerging evidence suggests the exercise pressor reflex is exaggerated in early stage type 1 diabetes mellitus (T1DM). Piezo channels may play a role in this exaggeration, as blocking these channels attenuates the exaggerated pressor response to tendon stretch in T1DM rats. However, tendon stretch constitutes a different mechanical and physiological stimuli than that occurring during muscle contraction. Therefore, the purpose of this study was to determine the contribution of Piezo channels in evoking the pressor reflex during an intermittent muscle contraction in T1DM. In unanesthetized decerebrate rats, we compared the pressor and cardioaccelerator responses to intermittent muscle contraction before and after locally injecting grammostola spatulata mechanotoxin 4 (GsMTx-4, 0.25 µM) into the hindlimb vasculature. Although GsMTx-4 has a high potency for Piezo channels, it has also been suggested to block transient receptor potential cation (TRPC) channels. We, therefore, performed additional experiments to control for this possibility by also injecting SKF 96365 (10 µM), a TRPC channel blocker. We found that local injection of GsMTx-4, but not SKF 96365, attenuated the exaggerated peak pressor (ΔMAP before: 33 ± 3 mmHg, after: 22 ± 3 mmHg, P = 0.007) and pressor index (ΔBPi before: 668 ± 91 mmHg·s, after: 418 ± 81 mmHg·s, P = 0.021) response in streptozotocin (STZ) rats (n = 8). GsMTx-4 attenuated the exaggerated early onset pressor and the pressor response over time, which eliminated peak differences as well as those over time between T1DM and healthy controls. These data suggest that Piezo channels are an effective target to normalize the exercise pressor reflex in T1DM.NEW & NOTEWORTHY This is the first study to demonstrate that blocking Piezo channels is effective in ameliorating the exaggerated exercise pressor reflex evoked by intermittent muscle contraction, commonly occurring during physical activity, in T1DM. Thus, these findings suggest Piezo channels may serve as an effective therapeutic target to reduce the acute and prolonged cardiovascular strain that may occur during dynamic exercise in T1DM.
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MESH Headings
- Animals
- Autonomic Nervous System/drug effects
- Autonomic Nervous System/metabolism
- Autonomic Nervous System/physiopathology
- Blood Pressure/drug effects
- Cardiovascular System/innervation
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/physiopathology
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/physiopathology
- Female
- Heart Rate/drug effects
- Intercellular Signaling Peptides and Proteins/pharmacology
- Ion Channels/antagonists & inhibitors
- Ion Channels/metabolism
- Male
- Membrane Transport Modulators/pharmacology
- Muscle Contraction
- Muscle, Skeletal/innervation
- Physical Conditioning, Animal
- Rats, Sprague-Dawley
- Reflex, Abnormal/drug effects
- Spider Venoms/pharmacology
- Time Factors
- Rats
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Affiliation(s)
- Ann-Katrin Grotle
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas
| | - Yu Huo
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas
| | - Michelle L Harrison
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas
| | - Kai M Ybarbo
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas
| | - Audrey J Stone
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas
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15
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Ko M, Kamimura K, Owaki T, Nagoya T, Sakai N, Nagayama I, Niwa Y, Shibata O, Oda C, Morita S, Kimura A, Inoue R, Setsu T, Sakamaki A, Yokoo T, Terai S. Modulation of serotonin in the gut-liver neural axis ameliorates the fatty and fibrotic changes in non-alcoholic fatty liver. Dis Model Mech 2021; 14:dmm048922. [PMID: 33787507 PMCID: PMC8084356 DOI: 10.1242/dmm.048922] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 02/05/2021] [Indexed: 12/15/2022] Open
Abstract
The etiology of non-alcoholic fatty liver disease (NAFLD) consists of various factors, including neural signal pathways. However, the molecular mechanisms of the autonomic neural signals influencing NAFLD progression have not been elucidated. Therefore, we examined the involvement of the gut-liver neural axis in NAFLD development and tested the therapeutic effect of modulation of this axis in this study. To test the contribution of the gut-liver neural axis, we examined NAFLD progression with respect to body weight, hepatic steatosis, fibrosis, intestinal tight junction, microbiota and short-chain fatty acids in NAFLD models of choline-deficient defined L-amino-acid and high-fat diet-fed mice with or without blockades of autonomic nerves from the liver. Blockade of the neural signal from the liver to the gut in these NAFLD mice models ameliorated the progression of liver weight, hepatic steatosis and fibrosis by modulating serotonin expression in the small intestine. It was related to the severity of the liver pathology, the tight junction protein expression, microbiota diversity and short-chain fatty acids. These effects were reproduced by administrating serotonin antagonist, which ameliorated the NAFLD progression in the NAFLD mice models. Our study demonstrated that the gut-liver neural axis is involved in the etiologies of NAFLD progression and that serotonin expression through this signaling network is the key factor of this axis. Therefore, modulation of the gut-liver neural axis and serotonin antagonist ameliorates fatty and fibrotic changes in non-alcoholic fatty liver, and can be a potential therapeutic target of NAFLD.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Masayoshi Ko
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Kenya Kamimura
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
- Department of General Medicine, Niigata University School of Medicine, Niigata, 951-8510, Japan
| | - Takashi Owaki
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Takuro Nagoya
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Norihiro Sakai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Itsuo Nagayama
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Yusuke Niwa
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Osamu Shibata
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Chiyumi Oda
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Shinichi Morita
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Atsushi Kimura
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Ryosuke Inoue
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Toru Setsu
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Akira Sakamaki
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Takeshi Yokoo
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
| | - Shuji Terai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
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16
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Dos Santos JHB, Passos RS, Freire IV, Ribeiro ÍJS, Oliveira AA, Casotti CA, Alkahtani SA, Barbosa AAL, Pereira R. The D allele of angiotensin-converting enzyme gene is associated with a worse autonomic heart control in community-based older adults. Exp Gerontol 2021; 146:111227. [PMID: 33429035 DOI: 10.1016/j.exger.2021.111227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/22/2020] [Accepted: 12/29/2020] [Indexed: 11/19/2022]
Abstract
The relationship between the Renin-Angiotensin-Aldosterone System (RAAS) and modulation of the Autonomic Nervous System (ANS) is reported as complex and bidirectional. Thus, the present study aimed to compare autonomous heart control, through symbolic analysis parameters, in the older adults carrying different ACE I/D gene polymorphisms (rs4646994). Two hundred four older adults comprised the study population and were grouped according to the ACE I/D gene polymorphism: II + ID genotype and DD genotype. Successive RR intervals were recorded along 5 min and analyzed with Symbolic Analysis (SA) method. 0 V%, 1 V% and 2 V% patterns were quantified and compared between groups. A linear mixed model analysis was used to determine between-group differences in symbolic analysis parameters (0 V%, 1 V% and 2 V%), taken groups as fixed factor and sex, use of ACE inhibitors and Angiotensin II receptor type I blockers as random factors. The Bayesian analysis was carried out to check the magnitude of the evidence. The results of this study indicate that older adults carrying the DD genotype have statistically greater sympathetic modulation (0 V%) and poor sympathovagal balance (1 V%), but the Bayesian analysis indicate only an anecdotal effect. Sympathetic predominance is recognized a worrying condition, since may predisposes to cardiovascular risk.
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Affiliation(s)
- Juleno Honorato Brito Dos Santos
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - R S Passos
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - Ivna Vidal Freire
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil; Postgraduate Program in Nursing & Health, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil; Human Genetics Laboratory, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - Ícaro J S Ribeiro
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil; Postgraduate Program in Nursing & Health, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - Alinne Alves Oliveira
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil; Postgraduate Program in Nursing & Health, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - Cezar Augusto Casotti
- Postgraduate Program in Nursing & Health, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - Shaea A Alkahtani
- College of Sport Sciences and Physical Activity, King Saud University, Riyadh, Saudi Arabia
| | - Ana Angélica Leal Barbosa
- Human Genetics Laboratory, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil
| | - Rafael Pereira
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil; Postgraduate Program in Nursing & Health, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil; Human Genetics Laboratory, Universidade Estadual do Sudoeste da Bahia, Jequie 45210-506, Bahia, Brazil.
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17
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Kakinuma Y. Characteristic Effects of the Cardiac Non-Neuronal Acetylcholine System Augmentation on Brain Functions. Int J Mol Sci 2021; 22:ijms22020545. [PMID: 33430415 PMCID: PMC7826949 DOI: 10.3390/ijms22020545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/05/2021] [Accepted: 01/05/2021] [Indexed: 02/07/2023] Open
Abstract
Since the discovery of non-neuronal acetylcholine in the heart, this specific system has drawn scientific interest from many research fields, including cardiology, immunology, and pharmacology. This system, acquired by cardiomyocytes independent of the parasympathetic nervous system of the autonomic nervous system, helps us to understand unsolved issues in cardiac physiology and to realize that the system may be more pivotal for cardiac homeostasis than expected. However, it has been shown that the effects of this system may not be restricted to the heart, but rather extended to cover extra-cardiac organs. To this end, this system intriguingly influences brain function, specifically potentiating blood brain barrier function. Although the results reported appear to be unusual, this novel characteristic can provide us with another research interest and therapeutic application mode for central nervous system diseases. In this review, we discuss our recent studies and raise the possibility of application of this system as an adjunctive therapeutic modality.
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Affiliation(s)
- Yoshihiko Kakinuma
- Department of Bioregulatory Science, Graduate School of Medicine, Nippon Medical School, Tokyo 113-8602, Japan
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18
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Shenton FC, Campbell T, Jones JFX, Pyner S. Distribution and morphology of sensory and autonomic fibres in the subendocardial plexus of the rat heart. J Anat 2021; 238:36-52. [PMID: 32783212 PMCID: PMC7754995 DOI: 10.1111/joa.13284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/26/2020] [Accepted: 07/02/2020] [Indexed: 01/11/2023] Open
Abstract
Cardiac reflexes originating from sensory receptors in the heart ensure blood supply to vital tissues and organs in the face of constantly changing demands. Atrial volume receptors are mechanically sensitive vagal afferents which relay to the medulla and hypothalamus, affecting vasopressin release and renal sympathetic activity. To date, two anatomically distinct sensory endings have been identified which may subserve cardiac mechanosensation: end-nets and flower-spray endings. To map the distribution of atrial receptors in the subendocardial space, we have double-labelled rat right atrial whole mounts for neurofilament heavy chain (NFH) and synaptic vesicle protein 2 (SV2) and generated high-resolution maps of the rat subendocardial neural plexus at the cavo-atrial region. In order to elucidate the nature of these fibres, double labelling with synaptophysin (SYN) and either NFH, calcitonin gene-related peptide (CGRP), choline acetyltransferase (ChAT) or tyrosine hydroxylase (TH) was performed. The findings show that subendocardial nerve nets are denser at the superior cavo-atrial junction than the mid-atrial region. Adluminal plexuses had the finest diameters and stained positively for synaptic vesicles (SV2 and SYN), CGRP and TH. These plexuses may represent sympathetic post-ganglionic fibres and/or sensory afferents. The latter are candidate substrates for type B volume receptors which are excited by stretch during atrial filling. Deeper nerve fibres appeared coarser and may be cholinergic (positive staining for ChAT). Flower-spray endings were never observed using immunohistochemistry but were delineated clearly with the intravital stain methylene blue. We suggest that differing nerve fibre structures form the basis by which atrial deformation and hence atrial filling is reflected to the brain.
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Affiliation(s)
| | - Thomas Campbell
- Discipline of AnatomySchool of MedicineUniversity College DublinDublin 4Ireland
| | - James F. X. Jones
- Discipline of AnatomySchool of MedicineUniversity College DublinDublin 4Ireland
| | - Susan Pyner
- Department of BiosciencesDurham UniversityDurhamUK
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19
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Abstract
Increasing evidence suggests that, although pancreatic islets can function autonomously to detect and respond to changes in the circulating glucose level, the brain cooperates with the islet to maintain glycaemic control. Here, we review the role of the central and autonomic nervous systems in the control of the endocrine pancreas, including mechanisms whereby the brain senses circulating blood glucose levels. We also examine whether dysfunction in these systems might contribute to complications of type 1 diabetes and the pathogenesis of type 2 diabetes. Graphical abstract.
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Affiliation(s)
- Chelsea L Faber
- UW Medicine Diabetes Institute, Department of Medicine, University of Washington, 750 Republican St, Box 358062, Seattle, WA, 98109, USA
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - Jennifer D Deem
- UW Medicine Diabetes Institute, Department of Medicine, University of Washington, 750 Republican St, Box 358062, Seattle, WA, 98109, USA
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - Carlos A Campos
- UW Medicine Diabetes Institute, Department of Medicine, University of Washington, 750 Republican St, Box 358062, Seattle, WA, 98109, USA
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - Gerald J Taborsky
- Department of Medicine, University of Washington, Seattle, WA, USA
- Veterans Affairs Puget Sound Health Care System, Department of Veterans Affairs Medical Center, Seattle, WA, USA
| | - Gregory J Morton
- UW Medicine Diabetes Institute, Department of Medicine, University of Washington, 750 Republican St, Box 358062, Seattle, WA, 98109, USA.
- Department of Medicine, University of Washington, Seattle, WA, USA.
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20
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Meerschaert KA, Adelman PC, Friedman RL, Albers KM, Koerber HR, Davis BM. Unique Molecular Characteristics of Visceral Afferents Arising from Different Levels of the Neuraxis: Location of Afferent Somata Predicts Function and Stimulus Detection Modalities. J Neurosci 2020; 40:7216-7228. [PMID: 32817244 PMCID: PMC7534907 DOI: 10.1523/jneurosci.1426-20.2020] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/30/2020] [Accepted: 08/07/2020] [Indexed: 02/07/2023] Open
Abstract
Viscera receive innervation from sensory ganglia located adjacent to multiple levels of the brainstem and spinal cord. Here we examined whether molecular profiling could be used to identify functional clusters of colon afferents from thoracolumbar (TL), lumbosacral (LS), and nodose ganglia (NG) in male and female mice. Profiling of TL and LS bladder afferents was also performed. Visceral afferents were back-labeled using retrograde tracers injected into proximal and distal regions of colon or bladder, followed by single-cell qRT-PCR and analysis via an automated hierarchical clustering method. Genes were chosen for assay (32 for bladder; 48 for colon) based on their established role in stimulus detection, regulation of sensitivity/function, or neuroimmune interaction. A total of 132 colon afferents (from NG, TL, and LS ganglia) and 128 bladder afferents (from TL and LS ganglia) were analyzed. Retrograde labeling from the colon showed that NG and TL afferents innervate proximal and distal regions of the colon, whereas 98% of LS afferents only project to distal regions. There were clusters of colon and bladder afferents, defined by mRNA profiling, that localized to either TL or LS ganglia. Mixed TL/LS clustering also was found. In addition, transcriptionally, NG colon afferents were almost completely segregated from colon TL and LS neurons. Furthermore, colon and bladder afferents expressed genes at similar levels, although different gene combinations defined the clusters. These results indicate that genes implicated in both homeostatic regulation and conscious sensations are found at all anatomic levels, suggesting that afferents from different portions of the neuraxis have overlapping functions.SIGNIFICANCE STATEMENT Visceral organs are innervated by sensory neurons whose cell bodies are located in multiple ganglia associated with the brainstem and spinal cord. For the colon, this overlapping innervation is proposed to facilitate visceral sensation and homeostasis, where sensation and pain are mediated by spinal afferents and fear and anxiety (the affective aspects of visceral pain) are the domain of nodose afferents. The transcriptomic analysis performed here reveals that genes implicated in both homeostatic regulation and pain are found in afferents across all ganglia types, suggesting that conscious sensation and homeostatic regulation are the result of convergence, and not segregation, of sensory input.
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Affiliation(s)
- Kimberly A Meerschaert
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | | | - Robert L Friedman
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - Kathryn M Albers
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - H Richard Koerber
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - Brian M Davis
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
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21
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Majeed F, Yar T. "Comparison of cardiovascular autonomic activity (heart rate variability and baroreceptor sensitivity) in young healthy females during fasting and hyperglycaemia". Diabetes Metab Syndr 2020; 14:1511-1518. [PMID: 32795743 DOI: 10.1016/j.dsx.2020.07.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 07/11/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND AND AIM The present study compared cardiovascular autonomic activity and reactivity during fasting (FS) and hyperglycemia (HS) states in young healthy females. METHODS This case crossover study was conducted on 30 females recruited by convenient sampling. Blood glucose levels were measured in FS and after oral glucose load i.e., HS. Finger arterial blood pressure (BP) and ECG were recorded constantly to monitor baroreceptor sensitivity (BRS) and heart rate variability (HRV). Autonomic reactivity was tested with deep breathing (DB), Valsalva manoeuvre (VM), and head-up-tilt (HUT) test under FS and HS. HRV parameters not normally distributed were natural log (ln) transformed. RESULTS Significantly reduced Valsalva ratio and higher heart rate and BP were observed in HS that continued during HUT (P < 0.05). The lnSDNN (standard deviation of normal-to-normal intervals) and lnRMSSD (root mean square of successive differences) were significantly lower (p < 0.05) in HS during HUT. After HUT, lnRMSSD remained lower (P = 0.031), whereas lnLF/HF (low frequency/high frequency power) ratio (P = 0.042) and LFnu (normalized units) (P = 0.024) were higher in HS. BRS was significantly lower in supine position in HS compared to FS and further reduced in HUT position in both FS and HS (P < 0.05). CONCLUSION Compared to FS, the HS exhibited heightened sympathetic activity with attenuation of parasympathetic activity and this phenomenon was further accentuated by HUT. BRS was more sensitive indicator of autonomic effects of hyperglycemia in resting state. In addition to standard tests, autonomic reactivity in vulnerable young subjects could be useful to detect autonomic imbalance at an early stage.
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Affiliation(s)
- Farrukh Majeed
- Department of Physiology College of Medicine Imam Abulrahman Bin Faisal University, Dammam, Saudi Arabia.
| | - Talay Yar
- Department of Physiology College of Medicine Imam Abulrahman Bin Faisal University, Dammam, Saudi Arabia.
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22
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Cheng Y, Sun F, D'Souza A, Dhakal B, Pisano M, Chhabra S, Stolley M, Hari P, Janz S. Autonomic nervous system control of multiple myeloma. Blood Rev 2020; 46:100741. [PMID: 32807576 DOI: 10.1016/j.blre.2020.100741] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/10/2020] [Accepted: 08/06/2020] [Indexed: 12/16/2022]
Abstract
The autonomic nervous system (ANS), which consists of antagonistic sympathetic (adrenergic) and parasympathetic (cholinergic) arms, has emerged as an important regulator of neoplastic development, yet little is known about its role in multiple myeloma (MM). Clinical findings that anti-adrenergic β-blocker intake reduces risk of disease-specific death and overall mortality in patients with MM have indicated that adrenergic input may worsen myeloma outcome. However, preclinical studies using β-adrenergic receptor agonists or antagonists produced controversial results as to whether sympathetic pathways promote or inhibit myeloma. Retrospective outcome data demonstrating that high message levels of cholinergic receptor genes predict inferior survival in the Multiple Myeloma Research Foundation CoMMpass trial suggest that parasympathetic input may drive myeloma progression in a subset of patients. Here we review the ill-defined role of the ANS in MM, put myeloma in the context of other cancers, and discuss knowledge gaps that may afford exciting research opportunities going forward.
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Affiliation(s)
- Yan Cheng
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Fumou Sun
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Anita D'Souza
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Binod Dhakal
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Michael Pisano
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Saurabh Chhabra
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Melinda Stolley
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Parameswaran Hari
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Siegfried Janz
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee 53226, WI, USA.
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23
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Qian C, Choi Y, Choi YJ, Kim S, Choi YY, Roe DG, Kang MS, Sun J, Cho JH. Oxygen-Detecting Synaptic Device for Realization of Artificial Autonomic Nervous System for Maintaining Oxygen Homeostasis. Adv Mater 2020; 32:e2002653. [PMID: 32643197 DOI: 10.1002/adma.202002653] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/09/2020] [Indexed: 06/11/2023]
Abstract
Incorporation of various functions of a biological nervous system into electronic devices is an intriguing challenge in the realization of a human-like recognition and response system. Emerging artificial synaptic devices capable of processing electronic signals through neuromorphic functions operate such biomimetic systems similarly to biological nervous systems. Here, an oxygen-sensitive artificial synaptic device that simultaneously detects oxygen concentration and generates a synaptic signal is demonstrated. The device successfully achieves an interconversion between the excitatory and inhibitory modes of the synaptic current at various oxygen concentrations by virtue of an oxygen-sensitive trilayered organic double heterojunction. The oxygen-induced traps in the organic layer modulate the majority charge carrier from holes to electrons, and this modulation induces an interconversion between the excitatory and inhibitory modes according to the environmental oxygen condition. Finally, the proposed synaptic device is applied to the realization of a negative feedback system for regulation of oxygen homeostasis, which mimics the human autonomic nervous system. The oxygen-sensitive synaptic device proposed in this study is expected to open up new possibilities for the development of a biomimetic neural system that can respond appropriately to various environmental changes.
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Affiliation(s)
- Chuan Qian
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Republic of Korea
| | - Yongsuk Choi
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Republic of Korea
| | - Young Jin Choi
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Seongchan Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Yoon Young Choi
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Republic of Korea
| | - Dong Gue Roe
- Department of Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Moon Sung Kang
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea
| | - Jia Sun
- Hunan Key Laboratory for Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Jeong Ho Cho
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 120-749, Republic of Korea
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24
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Bernjak A, Chow E, Robinson EJ, Freeman J, Marques JLB, Macdonald IA, Sheridan PJ, Heller SR. Influence of cardiac autonomic neuropathy on cardiac repolarisation during incremental adrenaline infusion in type 1 diabetes. Diabetologia 2020; 63:1066-1071. [PMID: 32030469 PMCID: PMC7145773 DOI: 10.1007/s00125-020-05106-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 01/13/2020] [Indexed: 11/01/2022]
Abstract
AIMS/HYPOTHESIS We examined the effect of a standardised sympathetic stimulus, incremental adrenaline (epinephrine) infusion on cardiac repolarisation in individuals with type 1 diabetes with normal autonomic function, subclinical autonomic neuropathy and established autonomic neuropathy. METHODS Ten individuals with normal autonomic function and baroreceptor sensitivity tests (NAF), seven with subclinical autonomic neuropathy (SAN; normal standard autonomic function tests and abnormal baroreceptor sensitivity tests); and five with established cardiac autonomic neuropathy (CAN; abnormal standard autonomic function and baroreceptor tests) underwent an incremental adrenaline infusion. Saline (0.9% NaCl) was infused for the first hour followed by 0.01 μg kg-1 min-1 and 0.03 μg kg-1 min-1 adrenaline for the second and third hours, respectively, and 0.06 μg kg-1 min-1 for the final 30 min. High resolution ECG monitoring for QTc duration, ventricular repolarisation parameters (T wave amplitude, T wave area symmetry ratio) and blood sampling for potassium and catecholamines was performed every 30 min. RESULTS Baseline heart rate was 68 (95% CI 60, 76) bpm for the NAF group, 73 (59, 87) bpm for the SAN group and 84 (78, 91) bpm for the CAN group. During adrenaline infusion the heart rate increased differently across the groups (p = 0.01). The maximum increase from baseline (95% CI) in the CAN group was 22 (13, 32) bpm compared with 11 (7, 15) bpm in the NAF and 10 (3, 18) bpm in the SAN groups. Baseline QTc was 382 (95% CI 374, 390) ms in the NAF, 378 (363, 393) ms in the SAN and 392 (367, 417) ms in the CAN groups (p = 0.31). QTc in all groups lengthened comparably with adrenaline infusion. The longest QTc was 444 (422, 463) ms (NAF), 422 (402, 437) ms (SAN) and 470 (402, 519) ms (CAN) (p = 0.09). T wave amplitude and T wave symmetry ratio decreased and the maximum decrease occurred earlier, at lower infused adrenaline concentrations in the CAN group compared with NAF and SAN groups. AUC for the symmetry ratio was different across the groups and was lowest in the CAN group (p = 0.04). Plasma adrenaline rose and potassium fell comparably in all groups. CONCLUSIONS/INTERPRETATION Participants with CAN showed abnormal repolarisation in some measures at lower adrenaline concentrations. This may be due to denervation adrenergic hypersensitivity. Such individuals may be at greater risk of cardiac arrhythmias in response to physiological sympathoadrenal challenges such as stress or hypoglycaemia.
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Affiliation(s)
- Alan Bernjak
- Department of Oncology & Metabolism, University of Sheffield, Medical School, Beech Hill Road, Sheffield, UK
- INSIGNEO Institute for in silico Medicine, University of Sheffield, Sheffield, UK
| | - Elaine Chow
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China
| | - Emma J Robinson
- Department of Oncology & Metabolism, University of Sheffield, Medical School, Beech Hill Road, Sheffield, UK
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Jenny Freeman
- Leeds Institute of Life Sciences, University of Leeds, Leeds, UK
| | - Jefferson L B Marques
- Department of Oncology & Metabolism, University of Sheffield, Medical School, Beech Hill Road, Sheffield, UK
- Institute of Biomedical Engineering, Department of Electrical and Electronic Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Ian A Macdonald
- School of Life Sciences, Queen's Medical Centre, University of Nottingham, Nottingham, UK
| | - Paul J Sheridan
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Simon R Heller
- Department of Oncology & Metabolism, University of Sheffield, Medical School, Beech Hill Road, Sheffield, UK.
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK.
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25
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Oliveira PWC, de Sousa GJ, Birocale AM, Gouvêa SA, de Figueiredo SG, de Abreu GR, Bissoli NS. Chronic metformin reduces systemic and local inflammatory proteins and improves hypertension-related cardiac autonomic dysfunction. Nutr Metab Cardiovasc Dis 2020; 30:274-281. [PMID: 31653514 DOI: 10.1016/j.numecd.2019.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 08/30/2019] [Accepted: 09/04/2019] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND AIMS Metformin has been known to promote cardiovascular benefits in humans and animal models, even in non-diabetic subjects. However, its chronic effects on hypertension-related autonomic dysfunction remain poorly understood. Therefore, we evaluate the cardiac autonomic effects of chronic metformin in hypertensive rats. METHODS AND RESULTS Twelve-week-old male SHR and Wistar rats were separated into 3 groups: WN (Wistar normotensive); SC (SHR hypertensive control); and SM (SHR: Metformin 300 mg/kg/day for 30 days). Spontaneous and induced (by phenylephrine and sodium nitroprusside) baroreflexes were analysed in catheterised rats. Next, cardiac autonomic tone was evaluated through heart rate shift by atropine (parasympathetic) or atenolol (sympathetic). Plasma TNFα was assessed by ELISA. Western blot analyses of inflammatory, oxidant and antioxidant proteins were performed. Cardiac parasympathetic tone and baroreflex function were lower in SC than in WN, whereas cardiac sympathetic tone was higher. Metformin treatment in non-diabetic hypertensive rats reduced the resting heart rate, attenuated the cardiac sympathetic tone and improved baroreflex (especially in the offsetting of rising BP), while blood pressure and glycaemia remained unchanged. Cardiac sympathetic tone correlated negatively with spontaneous baroreflex. Metformin reduced plasma TNFα levels and decreased tissue expression of COX2 and NOX2 (which were positively correlated), without affecting SOD1 and SOD2. CONCLUSION Chronic metformin presented anti-inflammatory and antioxidant effects and, independently of alterations in glycaemia, it improved cardiac autonomic parameters that are impaired in hypertension, being related to end-organ damage and mortality. These findings open up perspectives for future innovative uses of metformin in cardiovascular diseases, especially in hypertension.
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Affiliation(s)
- Phablo Wendell C Oliveira
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Glauciene J de Sousa
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Antonio M Birocale
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Sônia A Gouvêa
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Suely G de Figueiredo
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Gláucia R de Abreu
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Nazaré S Bissoli
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, Espírito Santo, Brazil.
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26
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Armario A, Labad J, Nadal R. Focusing attention on biological markers of acute stressor intensity: Empirical evidence and limitations. Neurosci Biobehav Rev 2020; 111:95-103. [PMID: 31954151 DOI: 10.1016/j.neubiorev.2020.01.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 12/03/2019] [Accepted: 01/11/2020] [Indexed: 01/19/2023]
Abstract
ARMARIO, A, J. Labad and R. Nadal. Focusing attention on biological markers of acute stressor intensity: empirical evidence and limitations. NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS. The availability of biological markers that objectively quantify stress is a highly relevant issue. However, experimental evidence suggests that most physiological changes elicited by emotional stressors do not reflect their intensity and are not useful for this purpose. Thus, we review experimental evidence in animals and humans about the putative validity of neuroendocrine and sympathetic/parasympathetic variables to measure stress. Plasma levels of some hormones (e.g. ACTH, glucocorticoids, prolactin and catecholamines) have been found to reflect, at least under certain conditions, the intensity of emotional stressors in animals and probably in humans. However, the temporal resolution of hormone changes is insufficient to reflect the very dynamic psychological processes taking place while experiencing stressors. Cardiovascular parameters (e.g. heart rate and blood pressure) have much better temporal resolution but their validity as markers of stressor intensity either in animals or humans is problematic. Skin conductance and pupil dilation appear to be promising. Additional and more systematic studies are needed to demonstrate the actual validity of stress-induced physiological changes to quantify stress.
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Affiliation(s)
- Antonio Armario
- Institut de Neurociències, Spain; Animal Physiology Unit (Department of Cellular Biology, Physiology and Immunology), Faculty of Biosciences, Universitat Autònoma de Barcelona, Spain; CIBERSAM, Spain.
| | - Javier Labad
- CIBERSAM, Spain; Department of Mental Health, Parc Taulí Hospital Universitari, I3PT, Spain; Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Spain
| | - Roser Nadal
- Institut de Neurociències, Spain; CIBERSAM, Spain; Psicobiology Unit, Faculty of Psychology, Universitat Autònoma de Barcelona Spain
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27
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Lopes-Azevedo S, Fortaleza EAT, Busnardo C, Scopinho AA, Matthiesen M, Antunes-Rodrigues J, Corrêa FMA. The Supraoptic Nucleus of the Hypothalamus Modulates Autonomic, Neuroendocrine, and Behavioral Responses to Acute Restraint Stress in Rats. Neuroendocrinology 2020; 110:10-22. [PMID: 31280264 DOI: 10.1159/000500160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 04/02/2019] [Indexed: 11/19/2022]
Abstract
AIMS Acute restraint stress (RS) has been reported to cause neuronal activation in the supraoptic nucleus of the hypothalamus (SON). The aim of the study was to evaluate the role of SON on autonomic (mean arterial pressure [MAP], heart rate [HR], and tail temperature), neuroendocrine (corticosterone, oxytocin, and vasopressin plasma levels), and behavioral responses to RS. METHODS Guide cannulas were implanted bilaterally in the SON of male Wistar rats for microinjection of the unspecific synaptic blocker cobalt chloride (CoCl2, 1 mM) or vehicle (artificial cerebrospinal fluid, 100 nL). A catheter was introduced into the femoral artery for MAP and HR recording. Rats were subjected to RS, and it was studied the effect of microinjection of CoCl2 or vehicle into the SON on pressor and tachycardic responses, drop in tail temperature, plasma oxytocin, vasopressin, and corticosterone levels, and anxiogenic-like effect induced by RS. RESULTS SON pretreatment with CoCl2 reduced the RS-induced MAP and HR increase, without affecting the RS-evoked tail temperature decrease. Microinjection of CoCl2 into areas surrounding the SON did not affect RS-induced increase in MAP and HR, reinforcing the idea that SON influences RS-evoked cardiovascular responses. Also, SON pretreatment with CoCl2 reduced RS-induced increase in corticosterone and oxytocin, without affecting vasopressin plasma levels, suggesting its involvement in RS-induced neuroendocrine responses. Finally, the CoCl2 microinjection into SON inhibited the RS-caused delayed anxiogenic-like effect. CONCLUSION The results indicate that SON is an important component of the neural pathway that controls autonomic, neuroendocrine, and behavioral responses induced by RS.
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Affiliation(s)
- Silvana Lopes-Azevedo
- Department of Pharmacology of the School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil,
| | | | - Cristiane Busnardo
- Department of Pharmacology of the School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - América Augusto Scopinho
- Department of Pharmacology of the School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Melina Matthiesen
- Department of Pharmacology of the School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - José Antunes-Rodrigues
- Department of Pharmacology of the School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Fernando Morgan Aguiar Corrêa
- Department of Pharmacology of the School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
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28
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Weil ZM, Karelina K. Lifelong consequences of brain injuries during development: From risk to resilience. Front Neuroendocrinol 2019; 55:100793. [PMID: 31560884 PMCID: PMC6905510 DOI: 10.1016/j.yfrne.2019.100793] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 08/23/2019] [Accepted: 09/23/2019] [Indexed: 10/26/2022]
Abstract
Traumatic brain injuries in children represent a major public health issue and even relatively mild injuries can have lifelong consequences. However, the outcomes from these injuries are highly heterogeneous, with most individuals recovering fully, but a substantial subset experiencing prolonged or permanent disabilities across a number of domains. Moreover, brain injuries predispose individuals to other kinds of neuropsychiatric and somatic illnesses. Critically, the severity of the injury only partially predicts subsequent outcomes, thus other factors must be involved. In this review, we discuss the psychological, social, neuroendocrine, and autonomic processes that are disrupted following traumatic brain injury during development, and consider the mechanisms the mediate risk or resilience after traumatic brain injury in this vulnerable population.
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Affiliation(s)
- Zachary M Weil
- Department of Neuroscience, Group in Behavioral Neuroendocrinology, Center for Brain and Spinal Cord Repair, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Kate Karelina
- Department of Neuroscience, Group in Behavioral Neuroendocrinology, Center for Brain and Spinal Cord Repair, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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29
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Mathew AV, Jaiswal M, Ang L, Michailidis G, Pennathur S, Pop-Busui R. Impaired Amino Acid and TCA Metabolism and Cardiovascular Autonomic Neuropathy Progression in Type 1 Diabetes. Diabetes 2019; 68:2035-2044. [PMID: 31337616 PMCID: PMC6754246 DOI: 10.2337/db19-0145] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 07/17/2019] [Indexed: 02/07/2023]
Abstract
While diabetes is characterized by hyperglycemia, nutrient metabolic pathways like amino acid and tricarboxylic acid (TCA) cycle are also profoundly perturbed. As glycemic control alone does not prevent complications, we hypothesized that these metabolic disruptions are responsible for the development and progression of diabetic cardiovascular autonomic neuropathy (CAN). We performed standardized cardiovascular autonomic reflex tests and targeted fasting plasma metabolomic analysis of amino acids and TCA cycle intermediates in subjects with type 1 diabetes and healthy control subjects followed for 3 years. Forty-seven participants with type 1 diabetes (60% female and mean ± SD age 35 ± 13 years, diabetes duration 13 ± 7 years, and HbA1c 7.9 ± 1.2%) had lower fumarate levels and higher threonine, serine, proline, asparagine, aspartic acid, phenylalanine, tyrosine, and histidine levels compared with 10 age-matched healthy control subjects. Higher baseline fumarate levels and lower baseline amino acid levels-asparagine and glutamine-correlate with CAN (lower baseline SD of normal R-R interval [SDNN]). Baseline glutamine and ornithine levels also associated with the progression of CAN (lower SDNN at 3 years) and change in SDNN, respectively, after adjustment for baseline HbA1c, blood glucose, BMI, cholesterol, urine microalbumin-to- creatinine ratio, estimated glomerular filtration rate, and years of diabetes. Therefore, significant changes in the anaplerotic flux into the TCA cycle could be the critical defect underlying CAN progression.
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Affiliation(s)
- Anna V Mathew
- Division of Nephrology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI
| | - Mamta Jaiswal
- Division of Metabolism, Endocrinology, and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, MI
| | - Lynn Ang
- Division of Metabolism, Endocrinology, and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, MI
| | | | - Subramaniam Pennathur
- Division of Nephrology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI
| | - Rodica Pop-Busui
- Division of Metabolism, Endocrinology, and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, MI
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30
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Kakall ZM, Kavurma MM, Cohen EM, Howe PR, Nedoboy PE, Pilowsky PM. Repetitive hypoglycemia reduces activation of glucose-responsive neurons in C1 and C3 medullary brain regions to subsequent hypoglycemia. Am J Physiol Endocrinol Metab 2019; 317:E388-E398. [PMID: 31013147 PMCID: PMC6732467 DOI: 10.1152/ajpendo.00051.2019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The impaired ability of the autonomic nervous system to respond to hypoglycemia is termed "hypoglycemia-associated autonomic failure" (HAAF). This life-threatening phenomenon results from at least two recent episodes of hypoglycemia, but the pathology underpinning HAAF remains largely unknown. Although naloxone appears to improve hypoglycemia counterregulation under controlled conditions, hypoglycemia prevention remains the current mainstay therapy for HAAF. Epinephrine-synthesizing neurons in the rostroventrolateral (C1) and dorsomedial (C3) medulla project to the subset of sympathetic preganglionic neurons that regulate peripheral epinephrine release. Here we determined whether or not C1 and C3 neuronal activation is impaired in HAAF and whether or not 1 wk of hypoglycemia prevention or treatment with naloxone could restore C1 and C3 neuronal activation and improve HAAF. Twenty male Sprague-Dawley rats (250-300 g) were used. Plasma epinephrine levels were significantly increased after a single episode of hypoglycemia (n = 4; 5,438 ± 783 pg/ml vs. control 193 ± 27 pg/ml, P < 0.05). Repeated hypoglycemia significantly reduced the plasma epinephrine response to subsequent hypoglycemia (n = 4; 2,179 ± 220 pg/ml vs. 5,438 ± 783 pg/ml, P < 0.05). Activation of medullary C1 (n = 4; 50 ± 5% vs. control 3 ± 1%, P < 0.05) and C3 (n = 4; 45 ± 5% vs. control 4 ± 1%, P < 0.05) neurons was significantly increased after a single episode of hypoglycemia. Activation of C1 (n = 4; 12 ± 3%, P < 0.05) and C3 (n = 4; 19 ± 5%, P < 0.05) neurons was significantly reduced in the HAAF groups. Hypoglycemia prevention or treatment with naloxone did not restore the plasma epinephrine response or C1 and C3 neuronal activation. Thus repeated hypoglycemia reduced the activation of C1 and C3 neurons mediating adrenal medullary responses to subsequent bouts of hypoglycemia.
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Affiliation(s)
- Zohra M Kakall
- The Heart Research Institute, Newtown, New South Wales, Australia
- Department of Physiology, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Mary M Kavurma
- The Heart Research Institute, Newtown, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - E Myfanwy Cohen
- The Heart Research Institute, Newtown, New South Wales, Australia
- Department of Physiology, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Peter R Howe
- School of Biomedical Sciences and Pharmacy, University of Newcastle and Institute for Resilient Regions, University of Southern Queensland, Springfield, Queensland, Australia
| | - Polina E Nedoboy
- The Heart Research Institute, Newtown, New South Wales, Australia
- Department of Physiology, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Paul M Pilowsky
- Department of Physiology, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
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31
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Brun S, Berglund A, Mortensen KH, Hjerrild BE, Hansen KW, Andersen NH, Gravholt CH. Blood pressure, sympathovagal tone, exercise capacity and metabolic status are linked in Turner syndrome. Clin Endocrinol (Oxf) 2019; 91:148-155. [PMID: 30954026 DOI: 10.1111/cen.13983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/30/2019] [Accepted: 03/31/2019] [Indexed: 01/15/2023]
Abstract
OBJECTIVES We studied cardiac autonomic changes in relation to metabolic factors, body composition and 24-hour ambulatory blood pressure measurements in Turner syndrome patients without known hypertension. DESIGN Cross sectional. PATIENTS Participants were 48 TS women and 24 healthy female controls aged over 18 years. METHODS Short-term power spectral analysis was obtained in supine-standing-supine position. Bedside tests included three conventional cardiovascular reflex tests of heart rate response to standing up, heart rate response to deep breathing and blood pressure response to standing up. Mean heart rate during the last 2 minutes of work was used to calculate the maximal aerobic power (VO2max ). RESULTS We found a significantly higher mean reciprocal of the heart rate per second (RR) in TS. Testing for interaction between position and status (TS or control), there were highly significant differences between TS and controls in high-frequency (HF) power, the coefficient of component variation (square root of HF power/mean RR) and low-frequency (LF): HF ratio, with a dampened decline in vagal activity among TS during standing. Bedside test showed TS had a significantly higher diastolic BP in the supine position compared to controls, and the adaptive rise in BP, when changing to upright position was reduced. VO2max and self-reported level of physical activity were significantly correlated to systolic ambulatory blood pressure both 24-hour and night diastolic ambulatory blood pressure. CONCLUSION Vagal tone and modulation of the sympathovagal balance during alteration in body position are impaired in TS. These changes can be risk factors for cardiovascular disease.
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Affiliation(s)
- Sara Brun
- Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark
| | - Agnethe Berglund
- Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Kristian H Mortensen
- Cardiorespiratory Unit, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Britta E Hjerrild
- Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark
| | - Klavs W Hansen
- Diagnostic Centre, Regional Hospital Silkeborg, Silkeborg, Denmark
| | - Niels H Andersen
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - Claus H Gravholt
- Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark
- Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
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Santos‐Bezerra DP, Admoni SN, Mori RC, Pelaes TS, Perez RV, Machado CG, Monteiro MB, Parisi MC, Pavin EJ, Queiroz MS, Passarelli M, Machado UF, Correa‐Giannella ML. Genetic variants in DNMT1 and the risk of cardiac autonomic neuropathy in women with type 1 diabetes. J Diabetes Investig 2019; 10:985-989. [PMID: 30548403 PMCID: PMC6626951 DOI: 10.1111/jdi.12988] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 10/29/2018] [Accepted: 12/09/2018] [Indexed: 11/28/2022] Open
Abstract
AIMS/INTRODUCTION Epigenetics participate in the pathogenesis of metabolic memory, a situation in which hyperglycemia exerts prolonged deleterious effects even after its normalization. We tested the hypothesis that genetic variants in an epigenetic gene could predispose to diabetes complications. MATERIAL AND METHODS We assessed the frequency of five single-nucleotide polymorphisms in the gene encoding deoxyribonucleic acid methytransferase 1 (DNMT1; rs8112895, rs7254567, rs11085721, rs17291414 and rs10854076), and their associations with diabetic kidney disease, retinopathy, distal polyneuropathy and autonomic cardiovascular neuropathy in 359 individuals with long-term type 1 diabetes. RESULTS None of the single-nucleotide polymorphisms studied was significantly associated with the presence of chronic complications in the overall population. However, after sex stratification, the minor allele C of rs11085721 conferred risk for cardiovascular neuropathy in women after adjustment for confounding variables (odds ratio 2.32; 95% confidence interval 1.26-4.33; P = 0.006). CONCLUSIONS The fact that heterozygous mutations in DNMT1 are associated with hereditary sensory autonomic neuropathy provides plausibility to the present finding. If confirmed in independent samples, it suggests that genetic variants in epigenetic genes might predispose to more or fewer epigenetic changes in the face of similar metabolic derangements triggered by hyperglycemia, constituting the "genetics of epigenetics" for microvascular diabetes complications.
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Affiliation(s)
- Daniele Pereira Santos‐Bezerra
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
| | - Sharon Nina Admoni
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
- Division of EndocrinologyClinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
| | - Rosana Cristina Mori
- Department of Physiology and BiophysicsInstitute of Biomedical SciencesUniversity of Sao PauloUniversity of São PauloSão PauloBrazil
| | - Tatiana Souza Pelaes
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
| | - Ricardo Vesoni Perez
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
| | | | - Maria Beatriz Monteiro
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
| | - Maria Candida Parisi
- Department of Internal MedicineFaculty of Medical SciencesState University of Campinas (UNICAMP)CampinasSao PauloBrazil
| | - Elizabeth Joao Pavin
- Department of Internal MedicineFaculty of Medical SciencesState University of Campinas (UNICAMP)CampinasSao PauloBrazil
| | - Marcia Silva Queiroz
- Division of EndocrinologyClinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
| | - Marisa Passarelli
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloSao PauloBrazil
| | - Ubiratan Fabres Machado
- Department of Physiology and BiophysicsInstitute of Biomedical SciencesUniversity of Sao PauloUniversity of São PauloSão PauloBrazil
| | - Maria Lucia Correa‐Giannella
- Laboratory of Carbohydrates and Radioimuneassays (LIM‐18)Clinical HospitalMedical SchoolUniversity of Sao PauloUniversidade de Sao PauloSao PauloBrazil
- Department of Post‐graduation in MedicineNove de Julho University (UNINOVE)Sao PauloBrazil
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Abstract
Hypertension affects an estimated 103 million Americans, yet gaps in knowledge continue to limit its successful management. Rapidly emerging evidence is linking gut dysbiosis to many disorders and diseases including hypertension. The evolution of the -omics techniques has allowed determination of the abundance and potential function of gut bacterial species by next-generation bacterial sequencing, whereas metabolomics techniques report shifts in bacterial metabolites in the systemic circulation of hypertensive patients and rodent models of hypertension. The gut microbiome and host have evolved to exist in balance and cooperation, and there is extensive crosstalk between the 2 to maintain this balance, including during regulation of blood pressure. However, an understanding of the mechanisms of dysfunctional host-microbiome interactions in hypertension is still lacking. Here, we synthesize some of our recent data with published reports and present concepts and a rationale for our emerging hypothesis of a dysfunctional gut-brain axis in hypertension. Hopefully, this new information will improve the understanding of hypertension and help to address some of these knowledge gaps.
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Affiliation(s)
- Jasenka Zubcevic
- Department of Physiological Sciences, College of Veterinary Medicine; University of Florida, Gainesville FL32610
| | - Elaine M. Richards
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Tao Yang
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Seungbum Kim
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Colin Sumners
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
| | - Carl J Pepine
- Division of Cardiovascular Medicine, Department of Medicine, College of Medicine, University of Florida, Gainesville FL32610
| | - Mohan K Raizada
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville FL32610
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Abstract
The acute heart rate response to exercise, i.e., heart rate increase during and heart rate recovery after exercise, has often been associated with all-cause and cardiovascular mortality. The long-term response of heart rate to exercise results in favourable changes in chronotropic function, including decreased resting and submaximal heart rate as well as increased heart rate recovery. Both the acute and long-term heart rate response to exercise have been shown to be heritable. Advances in genetic analysis enable researchers to investigate this hereditary component to gain insights in possible molecular mechanisms underlying interindividual differences in the heart rate response to exercise. In this review, we comprehensively searched candidate gene, linkage, and genome-wide association studies that investigated the heart rate response to exercise. A total of ten genes were associated with the acute heart rate response to exercise in candidate gene studies. Only one gene (CHRM2), related to heart rate recovery, was replicated in recent genome-wide association studies (GWASs). Additional 17 candidate causal genes were identified for heart rate increase and 26 for heart rate recovery in these GWASs. Nine of these genes were associated with both acute increase and recovery of the heart rate during exercise. These genes can be broadly categorized into four categories: (1) development of the nervous system (CCDC141, PAX2, SOX5, and CAV2); (2) prolongation of neuronal life span (SYT10); (3) cardiac development (RNF220 and MCTP2); (4) cardiac rhythm (SCN10A and RGS6). Additional 10 genes were linked to long-term modification of the heart rate response to exercise, nine with heart rate increase and one with heart rate recovery. Follow-up will be essential to get functional insights in how candidate causal genes affect the heart rate response to exercise. Future work will be required to translate these findings to preventive and therapeutic applications.
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Affiliation(s)
- Yordi J van de Vegte
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands
| | - Balewgizie S Tegegne
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, 9700 RB, Groningen, The Netherlands
| | - Niek Verweij
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands
| | - Harold Snieder
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, 9700 RB, Groningen, The Netherlands
| | - Pim van der Harst
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands.
- Department of Genetics, University of Groningen, University Medical Center Groningen, 9700 RB, Groningen, The Netherlands.
- Durrer Center for Cardiogenetic Research, Netherlands Heart Institute, 3511 GC, Utrecht, The Netherlands.
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Torrezan R, Malta A, de Souza Rodrigues WDN, Dos Santos AAA, Miranda RA, Moura EG, Lisboa PC, de Freitas Mathias PC. Monosodium l-glutamate-obesity onset is associated with disruption of central control of the hypothalamic-pituitary-adrenal axis and autonomic nervous system. J Neuroendocrinol 2019; 31:e12717. [PMID: 30929305 DOI: 10.1111/jne.12717] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 12/24/2022]
Abstract
The hypothalamic-pituitary-adrenal axis (HPA) exerts important catabolic peripheral effects and influences autonomic nervous system (ANS)-mediated processes. Impaired negative-feedback control or reduced HPA axis sensitivity and altered ANS activity appear to be associated with the development and maintenance of obesity. In the present study, we examined the hypothesis that the central HPA axis is dysregulated favouring ANS disbalance in monosodium l-glutamate (MSG)-induced rat obesity. Glucose homeostasis, corticosterone, leptin and ANS electrical activity were evaluated. Adult MSG-induced obese rats exhibited fasting hyperinsulinaemia, insulin resistance, glucose intolerance, hypercorticosteronaemia, hyperleptinaemia and altered ANS activity. A decrease in food intake was observed during corticotrophin-releasing hormone (CRH) treatment in both control and MSG-treated rats. By contrast, food intake was significantly elevated in control rats treated with dexamethasone (DEXA), whereas no alterations were observed following DEXA treatment in MSG-induced obese rats. After DEXA injection, an increase in fasting insulin and glucose levels, associated with insulin resistance, was seen in both groups. As expected, there was a decrease of parasympathetic activity and an increase of sympathetic nervous activity in CRH-treated control animals and the opposite effect was seen after DEXA treatment. By contrast, there was no effect on ANS activity in MSG-rats treated with CRH or DEXA. In conclusion, impairment of the HPA axis can lead to disbalance of ANS activity in MSG-treated rats, contributing to the establishment and maintenance of obesity.
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Affiliation(s)
- Rosana Torrezan
- Department of Physiological Sciences, State University of Maringá, Maringá, Brazil
| | - Ananda Malta
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, Brazil
| | | | | | - Rosiane Aparecida Miranda
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, Brazil
| | - Egberto Gaspar Moura
- Department of Physiological Sciences, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patrícia Cristina Lisboa
- Department of Physiological Sciences, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulo Cezar de Freitas Mathias
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, Brazil
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Meng G, Zhou X, Wang M, Zhou L, Wang Z, Wang M, Deng J, Wang Y, Zhou Z, Zhang Y, Lai Y, Zhang Q, Yang X, Yu L, Jiang H. Gut microbe-derived metabolite trimethylamine N-oxide activates the cardiac autonomic nervous system and facilitates ischemia-induced ventricular arrhythmia via two different pathways. EBioMedicine 2019; 44:656-664. [PMID: 30954457 PMCID: PMC6603492 DOI: 10.1016/j.ebiom.2019.03.066] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND We previously demonstrated the gut microbes-derived metabolite trimethylamine N-oxide (TMAO) could activate the atrial autonomic ganglion plexus and promote atrial arrhythmia. The cardiac sympathetic nervous system (CSNS) play important roles in modulating ventricular arrhythmia (VA). METHODS Part 1: To test whether TMAO can directly activate the CSNS, we performed local injection of TMAO into the left stellate ganglion (LSG). Part 2: To test whether TMAO can indirectly activate the CSNS through the central nervous system, we performed intravenous injection of TMAO. Ventricular electrophysiology and LSG function and neural activity were measured before and after TMAO administration. Then, the left anterior descending coronary artery was ligated, and electrocardiograms were recorded for 1 h. At the end of the experiment, LSG and paraventricular nucleus (PVN) tissues were excised for molecular analyses. FINDINGS Compared with the control, both intravenous and local TMAO administration significantly increased LSG function and activity, shortened effective refractory period, and aggravated ischemia-induced VA. Proinflammatory markers and c-fos in the LSG were also significantly upregulated in both TMAO-treated groups. Particularly, c-fos expression in PVN was significantly increased in the systemic TMAO administration group but not the local TMAO administration group. INTERPRETATION The gut microbe-derived metabolite TMAO can activate the CSNS and aggravate ischemia-induced VA via the direct pathway through the LSG and the indirect pathway through central autonomic activation. FUND: This work was supported by the National Key R&D Program of China [2017YFC1307800], and the National Natural Science Foundation of China [81530011, 81770364, 81570463, 81871486, 81600395, 81600367 and 81700444].
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Affiliation(s)
- Guannan Meng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Xiaoya Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Menglong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Liping Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Zhenya Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Meng Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Jielin Deng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Yuhong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Zhen Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Yifeng Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Yanqiu Lai
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Qianqian Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Xiaomeng Yang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China
| | - Lilei Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China.
| | - Hong Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Cardiovascular Research Institute, Wuhan University, Wuhan, Hubei, China; Hubei Key Laboratory of Cardiology, Wuhan, Hubei, China.
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Jun JE, Lee SE, Lee YB, Ahn JY, Kim G, Hur KY, Lee MK, Jin SM, Kim JH. Continuous glucose monitoring defined glucose variability is associated with cardiovascular autonomic neuropathy in type 1 diabetes. Diabetes Metab Res Rev 2019; 35:e3092. [PMID: 30345631 DOI: 10.1002/dmrr.3092] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/06/2018] [Accepted: 10/15/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND The purpose of this study was to establish the association between continuous glucose monitoring (CGM)-defined glycaemic variability (GV) and cardiovascular autonomic neuropathy (CAN) in type 1 diabetes independent of mean glucose and to examine the relative contribution of each internationally standardized CGM parameter to this association. MATERIALS AND METHODS This study included 80 adults with type 1 diabetes who underwent 3-day CGM and autonomic function tests within 3 months. The degree of association between internationally standardized CGM parameters and CAN, defined as at least two abnormal parasympathetic tests or the presence of orthostatic hypotension, were analysed by logistic regression, receiver operating characteristics (ROC), and dominance analysis. RESULTS A total of 36 subjects (45.0%) were diagnosed with CAN. When adjusted with mean glucose and clinical risk factors of CAN, standard deviation, coefficient of variation, mean amplitude of glycaemic excursion, percent time in level 1 (glucose 54-69 mg/dL) and level 2 (glucose < 54 mg/dL) hypoglycaemia, area under the curve in level 2 hypoglycaemia, low blood glucose index, high blood glucose index, and percent time in glucose 70 to 180 mg/dL were independently associated with CAN. Multivariable ROC analysis and dominance analysis revealed the highest relative contribution of percent time in level 2 hypoglycaemia to the independent associations between CGM parameters and presence of CAN. CONCLUSIONS CGM-defined GV was associated with CAN independent of mean glucose in adults with type 1 diabetes. Among internationally standardized CGM parameters, those describing the degree of level 2 hypoglycaemia were the most significant contributors to this association.
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Affiliation(s)
- Ji Eun Jun
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
- Department of Endocrinology and Metabolism, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Republic of Korea
| | - Seung-Eun Lee
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - You-Bin Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Ji Yeon Ahn
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Gyuri Kim
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kyu Yeon Hur
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Moon-Kyu Lee
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sang-Man Jin
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jae Hyeon Kim
- Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
- Department of Clinical Research Design & Evaluation, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea
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TOKUDOME T, KANGAWA K. Physiological significance of ghrelin in the cardiovascular system. Proc Jpn Acad Ser B Phys Biol Sci 2019; 95:459-467. [PMID: 31611501 PMCID: PMC6819151 DOI: 10.2183/pjab.95.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/10/2019] [Indexed: 06/01/2023]
Abstract
Ghrelin, a growth hormone-releasing peptide first discovered in rat stomach in 1999, is a ligand for the growth hormone secretagogue receptor. It participates in the regulation of diverse processes, including energy balance and body weight maintenance, and appears to be beneficial for the treatment of cardiovascular diseases. In animal models of chronic heart failure, ghrelin improves cardiac function and remodeling; these findings have been recapitulated in human patients. In other animal models, ghrelin effectively diminishes pulmonary hypertension. Moreover, ghrelin administration early after myocardial infarction decreased the frequency of fatal arrhythmia and improved survival rate. In ghrelin-deficient mice, endogenous ghrelin protects against fatal arrhythmia and promotes remodeling after myocardial infarction. Although the mechanisms underlying the effects of ghrelin on the cardiovascular system have not been fully elucidated, its beneficial effects appear to be mediated through regulation of the autonomic nervous system. Ghrelin is a promising therapeutic agent for cardiac diseases.
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Affiliation(s)
- Takeshi TOKUDOME
- Department of Biochemistry, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Kenji KANGAWA
- National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
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Abstract
Ghrelin, a growth hormone-releasing peptide that was first discovered in the stomach of rats in 1999, is an endogenous ligand of growth hormone secretagogue receptor. Ghrelin exerts its potent growth hormone-releasing and orexigenic activities by binding to specific receptors in the brain. Subsequent studies showed that ghrelin participates in the regulation of diverse processes, including energy balance, body weight maintenance, and glucose and fat metabolism, and demonstrated that ghrelin is beneficial for treatment of cardiac diseases. In animal models of chronic heart failure, administration of ghrelin improves cardiac function and remodeling, and these findings were recapitulated in human patients with heart failure. Also in animal models, ghrelin administration effectively diminishes pulmonary hypertension induced by monocrotaline or chronic hypoxia. In addition, repeated administration of ghrelin to cachectic chronic obstructive pulmonary disease patients has positive effects on body composition, including amelioration of muscle wasting, improvement of functional capacity, and sympathetic activity. Moreover, administration of ghrelin early after myocardial infarction decreases the frequency of fatal arrhythmia and improved the survival rate. In ghrelin-deficient mice, both exogenous and endogenous ghrelin protects against fatal arrhythmia and promotes remodeling after myocardial infarction. Although the mechanisms underlying the effects of ghrelin on the cardiovascular system have not been fully elucidated, some evidence suggests that its beneficial effects are mediated through both direct actions on cardiovascular cells and regulation of autonomic nervous system activity. Therefore, ghrelin is a promising novel therapeutic agent for cardiac disease.
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Affiliation(s)
- Takeshi Tokudome
- Department of Biochemistry (T.T, M.M), Regenerative Medicine and Tissue Engineering (K.O), and Trustee (K.K), National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan.
| | - Kentaro Otani
- Department of Biochemistry (T.T, M.M), Regenerative Medicine and Tissue Engineering (K.O), and Trustee (K.K), National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Mikiya Miyazato
- Department of Biochemistry (T.T, M.M), Regenerative Medicine and Tissue Engineering (K.O), and Trustee (K.K), National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Kenji Kangawa
- Department of Biochemistry (T.T, M.M), Regenerative Medicine and Tissue Engineering (K.O), and Trustee (K.K), National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
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Abstract
Since the serendipitous discovery of the first antipsychotic (AP) drug in the 1950s, APs remain the cornerstone of treatment for schizophrenia. A shift over the past two decades away from first-generation, conventional APs to so-called "atypical" (or 2nd/3rd generation) APs parallels acknowledgment of serious metabolic side-effects associated in particular with these newer agents. As will be reviewed, AP drugs and type 2 diabetes are now inextricably linked, contributing to the three- to fivefold increased risk of type 2 diabetes observed in schizophrenia. However, this association is not straightforward. Biological and lifestyle-related illness factors contribute to the association between type 2 diabetes and metabolic disease independently of AP treatment. In addition, APs have a well-established weight gain propensity which could also account for elevated risk of insulin resistance and type 2 diabetes. However, compelling preclinical and clinical evidence now suggests that these drugs can rapidly and directly influence pathways of glucose metabolism independently of weight gain and even in absence of psychiatric illness. Mechanisms of these direct effects remain poorly elucidated but may involve central and peripheral antagonism of neurotransmitters implicated not only in the therapeutic effects of APs but also in glucose homeostasis, possibly via effects on the autonomic nervous system. The clinical relevance of studying "direct" effects of these drugs on glucose metabolism is underscored by the widespread use of these medications, both on and off label, for a growing number of mental illnesses, extending safety concerns well beyond schizophrenia.
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Affiliation(s)
- Chantel Kowalchuk
- Centre for Addiction and Mental Health , Toronto, Ontario , Canada
- Institute of Medical Sciences, University of Toronto , Toronto, Ontario , Canada
| | | | - Araba Chintoh
- Centre for Addiction and Mental Health , Toronto, Ontario , Canada
- Department of Psychiatry, University of Toronto , Toronto, Ontario , Canada
| | - Gary Remington
- Centre for Addiction and Mental Health , Toronto, Ontario , Canada
- Institute of Medical Sciences, University of Toronto , Toronto, Ontario , Canada
- Department of Psychiatry, University of Toronto , Toronto, Ontario , Canada
| | - Adria Giacca
- Institute of Medical Sciences, University of Toronto , Toronto, Ontario , Canada
- Banting and Best Diabetes Centre, University of Toronto , Toronto, Ontario , Canada
- Department of Physiology, University of Toronto , Toronto, Ontario , Canada
- Department of Medicine, University of Toronto , Toronto, Ontario Canada
| | - Margaret K Hahn
- Centre for Addiction and Mental Health , Toronto, Ontario , Canada
- Institute of Medical Sciences, University of Toronto , Toronto, Ontario , Canada
- Department of Psychiatry, University of Toronto , Toronto, Ontario , Canada
- Banting and Best Diabetes Centre, University of Toronto , Toronto, Ontario , Canada
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Liu X, Qu C, Yang H, Shi S, Zhang C, Zhang Y, Liang J, Yang B. Chronic stimulation of the sigma-1 receptor ameliorates autonomic nerve dysfunction and atrial fibrillation susceptibility in a rat model of depression. Am J Physiol Heart Circ Physiol 2018; 315:H1521-H1531. [PMID: 30216117 DOI: 10.1152/ajpheart.00607.2017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study aimed to assess the effect of sigma-1 receptor (S1R) stimulation on autonomic nerve dysfunction and susceptibility to atrial fibrillation (AF) in a rat depression model. Male rats were randomly divided into one of the following four treatment groups: saline [control (CTL)]; saline + intragastric administration of SA4503, an agonist of S1R (CTS); chronic unpredictable mild stress (CUMS) to produce depression (MDD); and CUMS + intragastric administration of SA4503 (MDS). Depression-like behaviors, such as reduced sucrose preference, decreased body weight gain, and increased immobility time during forced swimming, improved in the MDS group after 4 wk of SA4503 treatment. Compared with rats in the CTL group, rats in the MDD group showed significantly augmented sympathetic activity, reduced parasympathetic activity, decreased heart rate variability, and lowered S1R expression in the atrium and hippocampus (all P < 0.01). However, rats in the MDS group showed mitigated aforementioned alterations and improved electrical remodeling compared with rats in the MDD group (all P < 0.01). Furthermore, rats in the MDS group showed shortened activation latencies, increased effective refractory periods, and lowered frequency of AF incidence duration and fibrosis compared with rats in the MDD group (all P < 0.01). The results indicate that S1R stimulation reduces sympathetic activity and susceptibility to AF by improving depressive behaviors, modulating cardiac autonomic nerve balance, lightening nerve remodeling, and upregulating S1R and ion channel protein expression. NEW & NOTEWORTHY Chronic stimulation of the sigma-1 receptor (S1R) ameliorates depression-induced autonomic nerve dysfunction by modulating the imbalance between overactivated sympathetic activity and decreased vagal activity. Chronic S1R stimulation alleviates atrial electrical remodeling, fibrosis, and susceptibility to atrial fibrillation (AF). The S1R agonist may target the underlying mechanisms related to AF occurrence. The results indicate that the S1R could be a potential clinical target for atrial arrhythmia, especially when it is combined with major depressive disorders.
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Affiliation(s)
- Xin Liu
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Chuan Qu
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Hongjie Yang
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Shaobo Shi
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Cui Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Yan Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Jinjun Liang
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
| | - Bo Yang
- Department of Cardiology, Renmin Hospital of Wuhan University , Wuhan , China
- Cardiovascular Research Institute, Wuhan University , Wuhan , China
- Hubei Key Laboratory of Cardiology , Wuhan , China
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Chadda KR, Ajijola OA, Vaseghi M, Shivkumar K, Huang CLH, Jeevaratnam K. Ageing, the autonomic nervous system and arrhythmia: From brain to heart. Ageing Res Rev 2018; 48:40-50. [PMID: 30300712 DOI: 10.1016/j.arr.2018.09.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 08/21/2018] [Accepted: 09/30/2018] [Indexed: 02/08/2023]
Abstract
An ageing myocardium possesses significant electrophysiological alterations that predisposes the elderly patient to arrhythmic risk. Whilst these alterations are intrinsic to the cardiac myocytes, they are modulated by the cardiac autonomic nervous system (ANS) and consequently, ageing of the cardiac ANS is fundamental to the development of arrhythmias. A systems-based approach that incorporates the influence of the cardiac ANS could lead to better mechanistic understanding of how arrhythmogenic triggers and substrates interact spatially and temporally to produce sustained arrhythmia and why its incidence increases with age. Despite the existence of physiological oscillations of ANS activity on the heart, pathological oscillations can lead to defective activation and recovery properties of the myocardium. Such changes can be attributable to the decrease in functionality and structural alterations to ANS specific receptors in the myocardium with age. These altered ANS adaptive responses can occur either as a normal ageing process or accelerated in the presence of specific cardiac pathologies, such as genetic mutations or neurodegenerative conditions. Targeted intervention that seek to manipulate the ageing ANS influence on the myocardium may prove to be an efficacious approach for the management of arrhythmia in the ageing population.
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Affiliation(s)
- Karan R Chadda
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7AL, United Kingdom; Physiological Laboratory, University of Cambridge, Downing Street, Cambridge, CB2 3EG, United Kingdom
| | - Olujimi A Ajijola
- UCLA Cardiac Arrhythmia Center, UCLA Health System/David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Marmar Vaseghi
- UCLA Cardiac Arrhythmia Center, UCLA Health System/David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Kalyanam Shivkumar
- UCLA Cardiac Arrhythmia Center, UCLA Health System/David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Christopher L-H Huang
- Physiological Laboratory, University of Cambridge, Downing Street, Cambridge, CB2 3EG, United Kingdom; Department of Biochemistry, Hopkins Building, University of Cambridge, Cambridge, CB2 1QW, United Kingdom
| | - Kamalan Jeevaratnam
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7AL, United Kingdom; Physiological Laboratory, University of Cambridge, Downing Street, Cambridge, CB2 3EG, United Kingdom.
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Thesing CS, Bot M, Milaneschi Y, Giltay EJ, Penninx BWJH. Omega-3 polyunsaturated fatty acid levels and dysregulations in biological stress systems. Psychoneuroendocrinology 2018; 97:206-215. [PMID: 30077075 DOI: 10.1016/j.psyneuen.2018.07.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 07/02/2018] [Accepted: 07/02/2018] [Indexed: 01/05/2023]
Abstract
BACKGROUND Studies have shown that omega-3 (n-3) Polyunsaturated Fatty Acids (PUFAs), including docosahexaenoic acid (DHA), might have beneficial effects on somatic and mental health, potentially partly due to their mitigating effects on three major biological stress systems: the immune-inflammatory system, the hypothalamic-pituitary-adrenal-axis (HPA-axis) and the autonomic nervous system (ANS). OBJECTIVE To examine the association between (cumulative measures of) markers of three biological stress systems and n-3 PUFA and DHA plasma levels. DESIGN Plasma n-3 PUFA and DHA were measured using Nuclear Magnetic Resonance in 2724 participants from the Netherlands Study of Depression and Anxiety. Linear regression analyses (adjusted for sociodemographic, sampling, lifestyle and somatic disease variables) associated inflammation (C-reactive protein, interleukin-6, tumor necrosis factor alpha), HPA-axis (cortisol awakening response and evening cortisol) and ANS (heart rate, respiratory sinus arrhythmia and pre-ejection period) markers and cumulative indices within and across stress systems as independent variables with n-3 PUFA and DHA levels as dependent variables. RESULTS Participants had a mean age of 41.8 (SD = 13.1) and 65.7% were female. Higher levels of all three inflammation markers (Beta=-.146 to -.073, all p-values<.001), evening cortisol (Beta=-.045, p = .033) and heart rate (Beta=-.080, p < 0.001) were significantly negatively associated with n-3 PUFA. Suggesting an exposure-response relationship, a higher number of markers indicative of inflammation and hyperactive HPA-axis (p < .001 and p = .003, respectively), but not of ANS dysregulation, was found in persons with lower n-3 PUFA levels. An exposure-response relationship was also found for having a higher number of different stress system dysregulations with lower n-3 PUFA levels (p < .001). For DHA, results were in line with those for n-3 PUFA, although with slightly smaller effect sizes. CONCLUSIONS Our study confirmed that having various (cumulative) indicators of dysregulation of three biological stress systems was significantly associated with lower n-3 PUFA and DHA plasma levels. If low n-3 PUFA levels are the cause of dysregulated stress systems, then n-3 PUFA supplementation might reduce biological stress and thereby improve somatic and mental health.
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Affiliation(s)
- Carisha S Thesing
- Department of Psychiatry, Amsterdam Public Health Research Institute and Amsterdam Neuroscience, VU University Medical Centre, Amsterdam, The Netherlands.
| | - Mariska Bot
- Department of Psychiatry, Amsterdam Public Health Research Institute and Amsterdam Neuroscience, VU University Medical Centre, Amsterdam, The Netherlands
| | - Yuri Milaneschi
- Department of Psychiatry, Amsterdam Public Health Research Institute and Amsterdam Neuroscience, VU University Medical Centre, Amsterdam, The Netherlands
| | - Erik J Giltay
- Department of Psychiatry, Leiden University Medical Center, Leiden, The Netherlands
| | - Brenda W J H Penninx
- Department of Psychiatry, Amsterdam Public Health Research Institute and Amsterdam Neuroscience, VU University Medical Centre, Amsterdam, The Netherlands
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Abstract
PURPOSE OF REVIEW Cardiometabolic disorders such as obesity, metabolic syndrome and diabetes are increasingly common and associated with adverse cardiovascular outcomes. The mechanisms driving these developments are incompletely understood but likely to include autonomic dysregulation. The latest evidence for such a role is briefly reviewed here. RECENT FINDINGS Recent findings highlight the relevance of autonomic regulation in glucose metabolism and identify sympathetic activation, in concert with parasympathetic withdrawal, as a major contributor to the development of metabolic disorders and an important mediator of the associated adverse cardiovascular consequences. Methods targeting sympathetic overactivity using pharmacological and device-based approaches are available and appear as logical additional approaches to curb the burden of metabolic disorders and alleviate the associated morbidity from cardiovascular causes. While the available data are encouraging, the role of therapeutic inhibition of sympathetic overdrive in the prevention of the metabolic disorders and the associated adverse outcomes requires adequate testing in properly sized randomised controlled trials.
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Affiliation(s)
- Revathy Carnagarin
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit / Medical Research Foundation, University of Western Australia, Level 3, MRF Building, Rear 50 Murray St, Perth, WA, 6000, Australia
| | - Vance B Matthews
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit / Medical Research Foundation, University of Western Australia, Level 3, MRF Building, Rear 50 Murray St, Perth, WA, 6000, Australia
| | - Lakshini Y Herat
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit / Medical Research Foundation, University of Western Australia, Level 3, MRF Building, Rear 50 Murray St, Perth, WA, 6000, Australia
| | - Jan K Ho
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit / Medical Research Foundation, University of Western Australia, Level 3, MRF Building, Rear 50 Murray St, Perth, WA, 6000, Australia
| | - Markus P Schlaich
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit / Medical Research Foundation, University of Western Australia, Level 3, MRF Building, Rear 50 Murray St, Perth, WA, 6000, Australia.
- Departments of Cardiology and Nephrology, Royal Perth Hospital, Perth, Australia.
- Neurovascular Hypertension & Kidney Disease Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.
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Abstract
Catechols are a class of compounds that contain adjacent hydroxyl groups on a benzene ring. Endogenous catechols in human plasma include the catecholamines norepinephrine, epinephrine (adrenaline), and dopamine; the catecholamine precursor DOPA, 3,4-dihydroxyphenylglycol (DHPG), which is the main neuronal metabolite of norepinephrine; and 3,4-dihydroxyphenylacetic acid (DOPAC), which is the main neuronal metabolite of dopamine. In the diagnostic evaluation of patients with known or suspected dysautonomias, measurement of plasma catechols is rarely diagnostic but often is informative. This review summarizes the roles of clinical catechol neurochemistry in autonomic function testing.
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Affiliation(s)
- David S Goldstein
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, 9000 Rockville Pike MSC-1620, Building 10 Room 8N260, Bethesda, MD, 20892-1620, USA.
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Huang J, Ulke C, Sander C, Jawinski P, Spada J, Hegerl U, Hensch T. Impact of brain arousal and time-on-task on autonomic nervous system activity in the wake-sleep transition. BMC Neurosci 2018; 19:18. [PMID: 29642849 PMCID: PMC5896037 DOI: 10.1186/s12868-018-0419-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 03/27/2018] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Autonomic nervous system (ANS) activity has been shown to vary with the state of brain arousal. In a previous study, this association of ANS activity with distinct states of brain arousal was demonstrated using 15-min EEG data, but without directly controlling for possible time-on-task effects. In the current study we examine ANS-activity in fine-graded EEG-vigilance stages (indicating states of brain arousal) during two conditions of a 2-h oddball task while controlling for time-on-task. In addition, we analyze the effect of time-on-task on ANS-activity while holding the level of brain arousal constant. METHODS Heart rate and skin conductance level of healthy participants were recorded during a 2-h EEG with eyes closed under simultaneous presentation of stimuli in an ignored (N = 39) and attended (N = 39) oddball condition. EEG-vigilance stages were classified using the Vigilance Algorithm Leipzig (VIGALL 2.1). The time-on-task effect was tested by dividing the EEG into four 30-min consecutive time blocks. ANS-activity was compared between EEG-vigilance stages across the entire 2 h and within each time block. RESULTS We found a coherent decline of ANS-activity with declining brain arousal states, over the 2-h recording and in most cases within each 30-min block in both conditions. Furthermore, we found a significant time-on-task effect on heart rate, even when arousal was kept constant. It was most pronounced between the first and all subsequent blocks and could have been a consequence of postural change at the beginning of the experiment. CONCLUSION Our findings contribute to the validation of VIGALL 2.1 using ANS parameters in 2-h EEG recording under oddball conditions.
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Affiliation(s)
- Jue Huang
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
| | - Christine Ulke
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
- Depression Research Centre, German Depression Foundation, Leipzig, Germany
| | - Christian Sander
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
- Depression Research Centre, German Depression Foundation, Leipzig, Germany
| | - Philippe Jawinski
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
- Depression Research Centre, German Depression Foundation, Leipzig, Germany
| | - Janek Spada
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
- Depression Research Centre, German Depression Foundation, Leipzig, Germany
| | - Ulrich Hegerl
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
- Depression Research Centre, German Depression Foundation, Leipzig, Germany
| | - Tilman Hensch
- Department of Psychiatry and Psychotherapy, University of Leipzig, Semmelweisstrasse 10, 04103 Leipzig, Germany
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Habersaat S, Abdellaoui S, Geiger AM, Urben S, Wolf JM. Low subjective social status in the police is linked to health-relevant changes in diurnal salivary alpha-amylase activity in Swiss police officers. Stress 2018; 21:11-18. [PMID: 29037115 DOI: 10.1080/10253890.2017.1389882] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
The objective of this study was to assess basal autonomic nervous system (ANS) activity as a pathway linking subjective social status to health in a high-demand work environment. It was hypothesized that officers with a lower status experienced more chronic stress (higher basal ANS activity) and that chronic stress was related to more health problems. Fifty-six male and female Swiss police officers self-reported on subjective social status (country, community, friends, police) and their health (depression, post-traumatic stress, physical symptoms) and collected 12 saliva samples over two days for basal α-amylase activation (sAA) assessment. Multilevel regression analyses revealed that subjective social status in the police and physical symptoms explained a significant part of the variance in diurnal sAA activity patterns. The current findings support the idea that more narrowly defined subjective social status may be more closely linked to biological stress mechanisms. Additionally, sAA activity was specifically related to physical, but not mental health problems. These results suggest that subjective social status referencing one's work environment may be a promising early indicator of health-relevant changes in stress-related physiological systems.
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Affiliation(s)
- Stéphanie Habersaat
- a Laboratory for Biological Health Psychology , Brandeis University , Waltham , MA USA
- b Laboratoire INTERPSY , Université de Lorraine , Nancy , France
- c Unité de recherche SUPEA, Départment de Psychiatrie , Centre Hospitalier Universitaire Vaudois , Lausanne , Switzerland
| | - Sid Abdellaoui
- b Laboratoire INTERPSY , Université de Lorraine , Nancy , France
| | - Ashley M Geiger
- a Laboratory for Biological Health Psychology , Brandeis University , Waltham , MA USA
| | - Sébastien Urben
- c Unité de recherche SUPEA, Départment de Psychiatrie , Centre Hospitalier Universitaire Vaudois , Lausanne , Switzerland
| | - Jutta M Wolf
- a Laboratory for Biological Health Psychology , Brandeis University , Waltham , MA USA
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48
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Maser RE, James Lenhard M, Pohlig RT, Babu Balagopal P. Osteopontin and clusterin levels in type 2 diabetes mellitus: differential association with peripheral autonomic nerve function. Neurol Sci 2017; 38:1645-1650. [PMID: 28638999 PMCID: PMC5709198 DOI: 10.1007/s10072-017-3019-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 06/03/2017] [Indexed: 12/27/2022]
Abstract
Osteopontin (OPN) and clusterin are secreted glycoproteins potentially associated with nerve function. Sudomotor dysfunction is associated with the development of foot ulcerations. The purpose of this study was to investigate the potential relationship of OPN and clusterin with sudomotor function (i.e., autonomic nerves that control sweating) in participants with type 2 diabetes mellitus (T2DM). Sudomotor function was assessed using SUDOSCAN® which measures electrochemical skin conductance (ESC) of the hands and feet. Demographics (e.g., age, gender, race, body mass index (BMI)), HbA1c, 25-hydroxyvitamin D, creatinine, OPN, and clusterin were also determined for the participants. Fifty individuals with T2DM (age = 59±11 years; 23/27 male/female; 13 African Americans) participated in this study. Lower ESC for the hands and feet were observed in African Americans versus Caucasians/Asians (p < 0.05). No significant ESC differences were observed for good [HbA1c <7%] versus poor [HbA1c ≥7%] glycemic control. With regard to gender, ESC values were lower for the hands for females (p < 0.05). In linear regression with ESC for the hands or feet as the dependent variable, increased OPN levels, but not clusterin, were independently associated with reduced sudomotor function while adjusting for age, gender, race, BMI, and glycemic control (ESC hands model R 2 = 0.504, p < 0.001; ESC feet model R 2 = 0.534, p < 0.001). The association between OPN and reduced sudomotor function found in our study warrants further investigation to delineate the underlying mechanisms and determine if OPN is neuroprotective, involved in the pathogenesis of sudomotor dysfunction, or simply a bystander.
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Affiliation(s)
- Raelene E Maser
- Department of Medical Laboratory Sciences, University of Delaware, 305F Willard Hall Education Building, Newark, DE, 19716, USA.
- Diabetes and Metabolic Research Center, Christiana Care Health System, Newark, DE, 19713, USA.
| | - M James Lenhard
- Diabetes and Metabolic Research Center, Christiana Care Health System, Newark, DE, 19713, USA
- Diabetes and Metabolic Diseases Center, Christiana Care Health System, Wilmington, DE, 19801, USA
| | - Ryan T Pohlig
- Biostatistics Core Facility, University of Delaware, Newark, DE, 19716, USA
| | - P Babu Balagopal
- Biomedical Research & Analysis Laboratory, Nemours Children's Specialty Care & Mayo Clinic College of Medicine, Jacksonville, FL, 32207, USA
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Franco CCS, Prates KV, Previate C, Moraes AMP, Matiusso CCI, Miranda RA, de Oliveira JC, Tófolo LP, Martins IP, Barella LF, Ribeiro TA, Malta A, Pavanello A, Francisco FA, Gomes RM, Alves VS, Moreira VM, Rigo KP, Almeida DL, de Sant Anna JR, Prado MAAC, Mathias PCF. Glibenclamide treatment blocks metabolic dysfunctions and improves vagal activity in monosodium glutamate-obese male rats. Endocrine 2017; 56:346-356. [PMID: 28233096 DOI: 10.1007/s12020-017-1263-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 02/06/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND/AIMS Autonomic nervous system imbalance is associated with metabolic diseases, including diabetes. Glibenclamide is an antidiabetic drug that acts by stimulating insulin secretion from pancreatic beta cells and is widely used in the treatment of type 2 diabetes. Since there is scarce data concerning autonomic nervous system activity and diabetes, the aim of this work was to test whether glibenclamide can improve autonomic nervous system activity and muscarinic acetylcholine receptor function in pre-diabetic obese male rats. METHODS Pre-diabetes was induced by treatment with monosodium L-glutamate in neonatal rats. The monosodium L-glutamate group was treated with glibenclamide (2 mg/kg body weight /day) from weaning to 100 days of age, and the control group was treated with water. Body weight, food intake, Lee index, fasting glucose, insulin levels, homeostasis model assessment of insulin resistance, omeostasis model assessment of β-cell function, and fat tissue accumulation were measured. The vagus and sympathetic nerve electrical activity were recorded. Insulin secretion was measured in isolated islets challenged with glucose, acetylcholine, and the selective muscarinic acetylcholine receptor antagonists by radioimmunoassay technique. RESULTS Glibenclamide treatment prevented the onset of obesity and diminished the retroperitoneal (18%) and epididymal (25%) fat pad tissues. In addition, the glibenclamide treatment also reduced the parasympathetic activity by 28% and glycemia by 20% in monosodium L-glutamate-treated rats. The insulinotropic effect and unaltered cholinergic actions in islets from monosodium L-glutamate groups were increased. CONCLUSION Early glibenclamide treatment prevents monosodium L-glutamate-induced obesity onset by balancing autonomic nervous system activity.
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Affiliation(s)
- Claudinéia C S Franco
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil.
| | - Kelly V Prates
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Carina Previate
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Ana M P Moraes
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Camila C I Matiusso
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Rosiane A Miranda
- Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro/RJ, Brazil
| | - Júlio C de Oliveira
- Institute of Health Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil
| | - Laize P Tófolo
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Isabela P Martins
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Luiz F Barella
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Tatiane A Ribeiro
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Ananda Malta
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Audrei Pavanello
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Flávio A Francisco
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Rodrigo M Gomes
- Department of Physiological Sciences, Federal University of Goiás, Goiânia/GO, Brazil
| | - Vander S Alves
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Veridiana M Moreira
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Késia P Rigo
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Douglas L Almeida
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
| | - Juliane R de Sant Anna
- Laboratory of Mutagenesis & Genetics, Department of Cell Biology and Genetics, State University of Maringá, Maringá, PR, Brazil
| | - Marialba A A C Prado
- Laboratory of Mutagenesis & Genetics, Department of Cell Biology and Genetics, State University of Maringá, Maringá, PR, Brazil
| | - Paulo C F Mathias
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, Maringá, PR, Brazil
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von Scholten BJ, Hansen CS, Hasbak P, Kjaer A, Rossing P, Hansen TW. Cardiac Autonomic Function Is Associated With the Coronary Microcirculatory Function in Patients With Type 2 Diabetes. Diabetes 2016; 65:3129-38. [PMID: 27352886 DOI: 10.2337/db16-0437] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 06/22/2016] [Indexed: 11/13/2022]
Abstract
Cardiac autonomic dysfunction and cardiac microvascular dysfunction are diabetic complications associated with increased mortality, but the association between these has been difficult to assess. We applied new and sensitive methods to assess this in patients with type 2 diabetes mellitus (T2DM). In a cross-sectional design, coronary flow reserve (CFR) assessed by cardiac (82)Rb-positron emission tomography/computed tomography, cardiac autonomic reflex tests, and heart rate variability indices were performed in 55 patients with T2DM, without cardiovascular disease, and in 28 control subjects. Cardiac (123)I-metaiodobenzylguanidine scintigraphy was conducted in a subgroup of 29 patients and 14 control subjects and evaluated as the late heart-to-mediastinum ratio and washout rate. Impaired function of all the cardiac autonomic measures (except the washout rate) was associated with reduced CFR. A heart rate variability index, reflecting sympathetic and parasympathetic function (low-frequency power), and the late heart-to-mediastinum ratio, reflecting the function of adrenergic receptors and sympathetic activity, were positively correlated with CFR after adjustment for age and heart rate. The late heart-to- mediastinum ratio remained correlated with CFR after further adjustment. In patients with T2DM without cardiovascular disease, we demonstrate an independent association between cardiac autonomic function and CFR. We suggest that a reduced cardiac autonomic function and damage to the adrenergic receptors may contribute to the development of cardiac microvascular dysfunction.
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Affiliation(s)
| | | | - Philip Hasbak
- Department of Clinical Physiology, Nuclear Medicine & PET and Cluster for Molecular Imaging, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Andreas Kjaer
- Department of Clinical Physiology, Nuclear Medicine & PET and Cluster for Molecular Imaging, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Peter Rossing
- Steno Diabetes Center, Gentofte, Denmark University of Copenhagen, Copenhagen, Denmark Aarhus University, Aarhus, Denmark
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