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Martin LS, Josset-Lamaugarny A, El Jammal T, Ducreux S, Chevalier FP, Fromy B. Aging is associated with impaired triggering of TRPV3-mediated cutaneous vasodilation: a crucial process for local heat exposure. GeroScience 2024; 46:3567-3580. [PMID: 37855862 PMCID: PMC11226586 DOI: 10.1007/s11357-023-00981-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 10/09/2023] [Indexed: 10/20/2023] Open
Abstract
Sensing temperature is vitally important to adapt our body to environmental changes. Local warm detection is required to initiate regulation of cutaneous blood flow, which is part of the peripheral thermoregulatory mechanisms, and thus avoid damage to surrounding tissues. The mechanisms mediating cutaneous vasodilation during local heat stress are impaired with aging. However, the impact of aging on the ability of the skin to detect subtle thermal changes is unknown. Among heat-activated cation channels, transient receptor potential vanilloid 3 (TRPV3) is a thermo-sensor predominantly expressed on keratinocytes and involved in local vascular thermoregulatory mechanisms of the skin in young mice. In the present study, using a murine in vivo model of local heat exposure of the skin, we showed that heat-induced vasodilation was reduced in old mice associated with reduced expression of TRPV3 channels. We also found a decrease in expression and activity of TRPV3 channel, as well as reduced TRPV3-dependent adenosine tri-phosphate release in human primary keratinocytes from old donors. This study shows that aging alters the epidermal TRPV3 channels, which might delay the detection of changes in skin temperature, thereby limiting the mechanisms triggered for local vascular thermoregulation in the old skin.
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Affiliation(s)
- Lisa S Martin
- CNRS UMR 5305, Tissue Biology and Therapeutic Engineering Laboratory (LBTI), 69007, Lyon, France
- Claude Bernard University Lyon 1, 69100, Villeurbanne, France
| | - Audrey Josset-Lamaugarny
- CNRS UMR 5305, Tissue Biology and Therapeutic Engineering Laboratory (LBTI), 69007, Lyon, France
- Claude Bernard University Lyon 1, 69100, Villeurbanne, France
| | - Thomas El Jammal
- CNRS UMR 5305, Tissue Biology and Therapeutic Engineering Laboratory (LBTI), 69007, Lyon, France
- Claude Bernard University Lyon 1, 69100, Villeurbanne, France
- Department of Internal Medicine, University Hospital Lyon Croix-Rousse, Claude Bernard University Lyon 1, Lyon, France
| | - Sylvie Ducreux
- CarMeN Laboratory, INSERM, INRA, INSA Lyon, Claude Bernard University Lyon 1, 69500, Bron, France
| | - Fabien P Chevalier
- CNRS UMR 5305, Tissue Biology and Therapeutic Engineering Laboratory (LBTI), 69007, Lyon, France
- Claude Bernard University Lyon 1, 69100, Villeurbanne, France
| | - Bérengère Fromy
- CNRS UMR 5305, Tissue Biology and Therapeutic Engineering Laboratory (LBTI), 69007, Lyon, France.
- Claude Bernard University Lyon 1, 69100, Villeurbanne, France.
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2
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Sanchez B, Ferraro S, Josset-Lamaugarny A, Pagnon A, Hee CK, Nakab L, Sigaudo-Roussel D, Fromy B. Skin Cell and Tissue Responses to Cross-Linked Hyaluronic Acid in Low-Grade Inflammatory Conditions. Int J Inflam 2023; 2023:3001080. [PMID: 37663889 PMCID: PMC10474960 DOI: 10.1155/2023/3001080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 07/18/2023] [Accepted: 08/17/2023] [Indexed: 09/05/2023] Open
Abstract
Hyaluronic acid (HA), used in a variety of medical applications, is associated in rare instances to long-term adverse effects. Although the aetiology of these events is unknown, a number of hypotheses have been proposed, including low molecular weight of HA (LMW-HA) in the filler products. We hypothesized that cross-linked HA and its degradation products, in a low-grade inflammatory microenvironment, could impact immune responses that could affect cell behaviours in the dermis. Using two different cross-linking technologies VYC-15L and HYC-24L+, and their hyaluronidase-induced degradation products, we observed for nondegraded HA, VYC-15L and HYC-24L+, a moderate and transient increase in IL-1β, TNF-α in M1 macrophages under low-grade inflammatory conditions. Endothelial cells and fibroblasts were preconditioned using inflammatory medium produced by M1 macrophages. 24 h after LMW-HA fragments and HA stimulation, no cytokine was released in these preconditioned cells. To further characterize HA responses, we used a novel in vivo murine model exhibiting a systemic low-grade inflammatory phenotype. The intradermal injection of VYC-15L and its degradation products induced an inflammation and cell infiltration into the skin that was more pronounced than those by HYC-24L+. This acute cutaneous inflammation was likely due to mechanical effects due to filler injection and tissue integration rather than its biological effects on inflammation. VYC-15L and its degradation product potentiated microvascular response to acetylcholine in the presence of a low-grade inflammation. The different responses with 2D cell models and mouse model using the two tested cross-linking HA technologies showed the importance to use integrative complex model to better understand the effects of HA products according to inflammatory state.
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Affiliation(s)
- Benjamin Sanchez
- Laboratoire Biologie Tissulaire et Ingénierie Thérapeutique, Centre national de la recherche scientifique (CNRS), UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
- University of Lyon 1, UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
| | - Sandra Ferraro
- Laboratoire Biologie Tissulaire et Ingénierie Thérapeutique, Centre national de la recherche scientifique (CNRS), UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
- University of Lyon 1, UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
| | - Audrey Josset-Lamaugarny
- Laboratoire Biologie Tissulaire et Ingénierie Thérapeutique, Centre national de la recherche scientifique (CNRS), UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
- University of Lyon 1, UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
| | - Aurélie Pagnon
- NOVOTEC, ZAC du Chêne Europarc, 11 Rue Edison, 69500 Bron, France
| | - Charlie K. Hee
- Allergan Aesthetics, An AbbVie Company, 2525 Dupont Dr., Irvine, CA 92612, USA
| | - Lauren Nakab
- Allergan Aesthetics, An AbbVie Company, 2525 Dupont Dr., Irvine, CA 92612, USA
| | - Dominique Sigaudo-Roussel
- Laboratoire Biologie Tissulaire et Ingénierie Thérapeutique, Centre national de la recherche scientifique (CNRS), UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
- University of Lyon 1, UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
| | - Bérengère Fromy
- Laboratoire Biologie Tissulaire et Ingénierie Thérapeutique, Centre national de la recherche scientifique (CNRS), UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
- University of Lyon 1, UMR 5305, LBTI, 7 Passage du Vercors, F-69367 Lyon cedex 7, France
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de Bengy AF, Lamartine J, Sigaudo-Roussel D, Fromy B. Newborn and elderly skin: two fragile skins at higher risk of pressure injury. Biol Rev Camb Philos Soc 2022; 97:874-895. [PMID: 34913582 DOI: 10.1111/brv.12827] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 12/02/2021] [Accepted: 12/06/2021] [Indexed: 02/03/2023]
Abstract
Skin is a key organ maintaining internal homeostasis by performing many functions such as water loss prevention, body temperature regulation and protection from noxious substance absorption, microorganism intrusion and physical trauma. Skin ageing has been well studied and it is well known that physiological changes in the elderly result in higher skin fragility favouring the onset of skin diseases. For example, prolonged and/or high-intensity pressure may suppress local blood flow more easily, disturbing cell metabolism and inducing pressure injury (PI) formation. Pressure injuries (PIs) represent a significant problem worldwide and their prevalence remains too high. A higher PI prevalence is correlated with an elderly population. Newborn skin evolution has been less studied, but some data also report a higher PI prevalence in this population compared to older children, and several authors also consider this skin as physiologically fragile. In this review, we compare the characteristics of newborn and elderly skin in order to determine common features that may explain their fragility, especially regarding PI risk. We show that, despite differences in appearance, they share many common features leading to higher fragility to shear and pressure forces, not only at the structural level but also at the cellular and molecular level and in terms of physiology. Both newborn and elderly skin have: (i) a thinner epidermis; (ii) a thinner dermis containing a less-resistant collagen network, a higher collagen III:collagen I ratio and less elastin; (iii) a flatter dermal-epidermal junction (DEJ) with lower anchoring systems; and (iv) a thinner hypodermis, resulting in lower mechanical resistance to skin damage when pressure or shear forces are applied. At the molecular level, reduced expression of transforming growth factor β (TGFβ) and its receptor TGFβ receptor II (TβRII) is involved in the decreased production and/or increased degradation of various dermal extracellular matrix (ECM) components. Epidermal fragility also involves a higher skin pH which decreases the activity of key enzymes inducing ceramide deficiency and reduced barrier protection. This seems to be correlated with higher PI prevalence in some situations. Some data also suggest that stratum corneum (SC) dryness, which may disturb cell metabolism, also increases the risk of PI formation. Besides this structural fragility, several skin functions are also less efficient. Low applied pressures induce skin vessel vasodilation via a mechanism called pressure-induced vasodilation (PIV). Individuals lacking a normal PIV response show an early decrease in cutaneous blood flow in response to the application of very low pressures, reflecting vascular fragility of the skin that increases the risk of ulceration. Due to changes in endothelial function, skin PIV ability decreases during skin ageing, putting it at higher risk of PI formation. In newborns, some data lead us to hypothesize that the nitric oxide (NO) pathway is not fully functional at birth, which may partly explain the higher risk of PI formation in newborns. In the elderly, a lower PIV ability results from impaired functionality of skin innervation, in particular that of C-fibres which are involved in both touch and pain sensation and the PIV mechanism. In newborns, skin sensitivity differs from adults due to nerve system immaturity, but the role of this in PIV remains to be determined.
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Affiliation(s)
| | - Jérôme Lamartine
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, LBTI UMR5305, 7 Passage du Vercors, Lyon Cedex 7, F- 69367, France
| | - Dominique Sigaudo-Roussel
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, LBTI UMR5305, 7 Passage du Vercors, Lyon Cedex 7, F- 69367, France
| | - Bérengère Fromy
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, LBTI UMR5305, 7 Passage du Vercors, Lyon Cedex 7, F- 69367, France
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Chauhan M, Betancourt A, Balakrishnan M, Mishra A, Espinosa J, Shamshirsaz AA, Fox K, Belfort M, Yallampalli C. Calcitonin Gene Related Peptide, Adrenomedullin, and Adrenomedullin 2 Function in Uterine Artery During Human Pregnancy. Endocrinology 2022; 163:6374898. [PMID: 34558598 PMCID: PMC8574633 DOI: 10.1210/endocr/bqab204] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Indexed: 12/26/2022]
Abstract
RATIONALE Calcitonin gene-related peptide (CGRP) and its family members adrenomedullin (ADM) and adrenomedullin 2 (ADM2; also known as intermedin) support vascular adaptions in rat pregnancy. OBJECTIVE This study aimed to assess the relaxation response of uterine artery (UA) for CGRP, ADM, and ADM2 in nonpregnant and pregnant women and identify the involved mechanisms. FINDINGS (1) Segments of UA from nonpregnant women that were precontracted with U46619 (1μM) in vitro are insensitive to the hypotensive effects of CGRP, ADM, and ADM2; (2) CGRP, ADM, and ADM2 (0.1-100nM) dose dependently relax UA segments from pregnant women with efficacy for CGRP > ADM = ADM2; (3) the relaxation responses to CGRP, ADM, and ADM2 are differentially affected by the inhibitors of nitric oxide (NO) synthase (L-NAME), adenylyl cyclase (SQ22536), apamin, and charybdotoxin; (4) UA smooth muscle cells (UASMC) express mRNA for calcitonin receptor-like receptor (CRLR) and receptor activity modifying protein (RAMP)1 and RAMP2 but not RAMP3; (5) receptor heterodimer comprising CRLR/RAMP1 and CRLR/RAMP2 but not CRLR/RAMP3 is present in UA; (6) soluble fms-like tyrosine kinase (sFLT-1) and TNF-α treatment decrease the expression of RAMP1 mRNA (P < 0.05) in UASMC; and (7) sFLT-1 treatment impairs the association of CRLR with all 3 peptides while TNF-α inhibits the interaction of CGRP but not ADM or ADM2 with CRLR in UASMC (P < 0.05). CONCLUSIONS Relaxation sensitivity of UA for CGRP, ADM, and ADM2 is increased during pregnancy via peptide-specific involvement of NO system and endothelium-derived hyperpolarizing factors; vascular disruptors such as sFLT-1 and TNFα adversely impact their receptor system in UASMC.
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Affiliation(s)
- Madhu Chauhan
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
- Correspondence: Madhu Chauhan, PhD, Department of Obstetrics and Gynecology, Baylor College of Medicine, 1102 bates Avenue, Houston, TX 77030, USA.
| | - Ancizar Betancourt
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Meena Balakrishnan
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Akansha Mishra
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jimmy Espinosa
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Alireza A Shamshirsaz
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Karin Fox
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Michael Belfort
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Chandra Yallampalli
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
- Correspondence: Chandra Yallampalli, DMV, PhD, Department of Obstetrics and Gynecology, Baylor College of Medicine, 1102 bates Avenue, Houston, TX 77030, USA.
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Razi O, Tartibian B, Teixeira AM, Zamani N, Govindasamy K, Suzuki K, Laher I, Zouhal H. Thermal dysregulation in patients with multiple sclerosis during SARS-CoV-2 infection. The potential therapeutic role of exercise. Mult Scler Relat Disord 2022; 59:103557. [PMID: 35092946 PMCID: PMC8785368 DOI: 10.1016/j.msard.2022.103557] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 01/16/2022] [Accepted: 01/22/2022] [Indexed: 12/15/2022]
Abstract
Thermoregulation is a homeostatic mechanism that is disrupted in some neurological diseases. Patients with multiple sclerosis (MS) are susceptible to increases in body temperature, especially with more severe neurological signs. This condition can become intolerable when these patients suffer febrile infections such as coronavirus disease-2019 (COVID-19). We review the mechanisms of hyperthermia in patients with MS, and they may encounter when infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Finally, the thermoregulatory role and relevant adaptation to regular physical exercise are summarized.
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Affiliation(s)
- Omid Razi
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Razi University, Kermanshah, Iran
| | - Bakhtyar Tartibian
- Department of Exercise Physiology, Faculty of Physical Education and Sports Sciences, Allameh Tabataba'i University, Tehran, Iran
| | - Ana Maria Teixeira
- University of Coimbra, Research Center for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Nastaran Zamani
- Department of Biology, Faculty of Science, Payame-Noor University, Tehran, Iran
| | - Karuppasamy Govindasamy
- Department of Physical Education & Sports Science, SRM Institute of Science and Technology, Kattankulathur, Tamilnadu, India
| | - Katsuhiko Suzuki
- Faculty of Sport Sciences, Waseda University, Tokorozawa 359-1192, Japan.
| | - Ismail Laher
- Department of Anesthesiology, Pharmacology and Therapeutics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Hassane Zouhal
- Univ Rennes, M2S (Laboratoire Mouvement, Sport, Santé) - EA 1274, Rennes F-35000, France; Institut International des Sciences du Sport (2I2S), Irodouer 35850, France.
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Guéré C, Bigouret A, Nkengne A, Vié K, Gélis A, Dulong J, Lamartine J, Fromy B. In elderly Caucasian women, younger facial perceived age correlates with better forearm skin microcirculation reactivity. Skin Res Technol 2021; 27:1152-1161. [PMID: 34224600 DOI: 10.1111/srt.13080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 06/24/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Visual and molecular changes occurring upon aging are rather well characterized. Still, aging signs show great significant inter-individual variations, and little is known concerning the link between perceived age and cutaneous microcirculation. MATERIALS AND METHODS To investigate this point, we recruited Caucasian women in their mid-50's to mid-70's and subsampled women looking older or younger than their age. We studied their facial skin color, as well as their microvascular reactivity to local heating assessed in the forearm skin. We also used skin biopsies from some of these women for gene expression or immunohistochemical analysis. RESULTS Clinical and instrumental analysis of skin color revealed that subjects who look 5 years younger differ only by a higher glowing complexion. Our most striking result is that subjects looking 5 years younger than their age present a higher microcirculation reactivity in forearm skin. Transcriptome comparison of skin samples from women looking older or younger than their age revealed 123 annotated transcripts differentially expressed, among which MYL9 relates to microcirculation. MYL9 is downregulated in the group of women looking younger than their real age. Microscopy shows that the labeling of MYL9 and CD31 are altered and heterogeneous with age, as is the morphology of microvessels. CONCLUSION Therefore, assessing generalized vascular reactivity in non-photo-exposed skin to focus on the intrinsic aging allows subtle discrimination of perceived age within elderly healthy subjects.
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Affiliation(s)
| | | | | | | | - Anthony Gélis
- Laboratoire de Biologie Tissulaire et d'ingénierie Thérapeutique, UMR5305 CNRS - Université Claude Bernard, Lyon Cedex 07, France
| | - Joshua Dulong
- Laboratoire de Biologie Tissulaire et d'ingénierie Thérapeutique, UMR5305 CNRS - Université Claude Bernard, Lyon Cedex 07, France
| | - Jérôme Lamartine
- Laboratoire de Biologie Tissulaire et d'ingénierie Thérapeutique, UMR5305 CNRS - Université Claude Bernard, Lyon Cedex 07, France
| | - Bérengère Fromy
- Laboratoire de Biologie Tissulaire et d'ingénierie Thérapeutique, UMR5305 CNRS - Université Claude Bernard, Lyon Cedex 07, France
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7
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The aging mouse brain: cognition, connectivity and calcium. Cell Calcium 2021; 94:102358. [PMID: 33517250 DOI: 10.1016/j.ceca.2021.102358] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/16/2021] [Accepted: 01/18/2021] [Indexed: 02/08/2023]
Abstract
Aging is a complex process that differentially impacts multiple cognitive, sensory, neuronal and molecular processes. Technological innovations now allow for parallel investigation of neuronal circuit function, structure and molecular composition in the brain of awake behaving adult mice. Thus, mice have become a critical tool to better understand how aging impacts the brain. However, a more granular systems-based approach, which considers the impact of age on key features relating to neural processing, is required. Here, we review evidence probing the impact of age on the mouse brain. We focus on a range of processes relating to neuronal function, including cognitive abilities, sensory systems, synaptic plasticity and calcium regulation. Across many systems, we find evidence for prominent age-related dysregulation even before 12 months of age, suggesting that emerging age-related alterations can manifest by late adulthood. However, we also find reports suggesting that some processes are remarkably resilient to aging. The evidence suggests that aging does not drive a parallel, linear dysregulation of all systems, but instead impacts some processes earlier, and more severely, than others. We propose that capturing the more fine-scale emerging features of age-related vulnerability and resilience may provide better opportunities for the rejuvenation of the aged brain.
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Rorteau J, Chevalier FP, Fromy B, Lamartine J. [Functional integrity of aging skin, from cutaneous biology to anti-aging strategies]. Med Sci (Paris) 2020; 36:1155-1162. [PMID: 33296632 DOI: 10.1051/medsci/2020223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The skin is a sentinel organ making easily visible the passing of time. Chronological and environmental aging weakens skin structure and functions. The skin barrier, the elastic and mechanical properties of the cutaneous tissue as well as its vascular reactivity are impacted by aging. The barrier dysfunction in aged skin is caused by defects in epidermal keratinocytes renewal and differentiation notably linked to abnormal expression of microRNAs regulating cell death and autophagy. An abnormal balance between synthesis and degradation of matrix proteins modifies the mechanical properties of the dermis in aged skin. Finally, a reduction of the vascular reactivity linked to endothelial dysfunctions is observed in elderly people. These biological processes can be targeted by therapeutic approaches either topical or systemic, especially using anti-oxydants or senolytics. These anti-aging strategies might contribute to restore, at least in part, the functional integrity of aged skin.
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Affiliation(s)
- Julie Rorteau
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France
| | - Fabien P Chevalier
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France
| | - Bérengère Fromy
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France
| | - Jérôme Lamartine
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France
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9
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Targeting endothelial thioredoxin-interacting protein (TXNIP) protects from metabolic disorder-related impairment of vascular function and post-ischemic revascularisation. Angiogenesis 2020; 23:249-264. [PMID: 31900750 DOI: 10.1007/s10456-019-09704-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 12/14/2019] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Although thioredoxin-interacting protein (TXNIP) is involved in a variety of biological functions, the contribution of endothelial TXNIP has not been well-defined in regards to endothelial and vascular function or in post-ischemic revascularisation. We postulated that inhibition of endothelial TXNIP with siRNA or in a Cre-LoxP system could be involved in protection from high fat, high protein, low carbohydrate (HFHPLC) diet-induced oxidative stress and endothelial dysfunction, leading to vascular damage and impaired revascularisation in vivo. METHODS AND RESULTS To investigate the role of endothelial TXNIP, the TXNIP gene was deleted in endothelial cells using anti-TXNIP siRNA treatment or the Cre-LoxP system. Murine models were fed a HFHPLC diet, known to induce metabolic disorders. Endothelial TXNIP targeting resulted in protection against metabolic disorder-related endothelial oxidative stress and endothelial dysfunction. This protective effect mitigates media cell loss induced by metabolic disorders and hampered metabolic disorder-related vascular dysfunction assessed by aortic reactivity and distensibility. In aortic ring cultures, metabolic disorders impaired vessel sprouting and this alteration was alleviated by deletion of endothelial TXNIP. When subjected to ischemia, mice fed a HFHPLC diet exhibited defective post-ischemic angiogenesis and impaired blood flow recovery in hind limb ischemia. However, reducing endothelial TXNIP rescued metabolic disorder-related impairment of ischemia-induced revascularisation. CONCLUSION Collectively, these results show that targeting endothelial TXNIP in metabolic disorders is essential to maintaining endothelial function, vascular function and improving ischemia-induced revascularisation, making TXNIP a potential therapeutic target for therapy of vascular complications related to metabolic disorders.
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10
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Zwanenburg PR, Backer SFM, Obdeijn MC, Lapid O, Gans SL, Boermeester MA. A Systematic Review and Meta-Analysis of the Pressure-Induced Vasodilation Phenomenon and Its Role in the Pathophysiology of Ulcers. Plast Reconstr Surg 2019; 144:669e-681e. [PMID: 31568315 DOI: 10.1097/prs.0000000000006090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Physiologic studies show that tissue perfusion increases during moderate amounts of tissue compression. This is attributed to sensory nerves initiating a vasodilatory cascade referred to as pressure-induced vasodilation. METHODS PubMed, Embase, and the Cochrane Central Register of Controlled Trials were searched for studies investigating perfusion during pressure exposure longer than 10 minutes. Retrieved studies were assessed using the Office of Health Assessment and Translation Risk of Bias Rating Tool for Human and Animal Studies. Results were pooled with random effects models. The body of evidence was rated using the Office of Health Assessment and Translation approach. RESULTS Twenty-nine articles were included, of which 19 articles were included in meta-analyses. The evidence indicates that moderate amounts of tissue compression have the capacity to increase perfusion in healthy humans by 46 percent (95 percent CI, 30 to 62 percent). Using the Office of Health Assessment and Translation approach, the authors found a high level of confidence in the body of evidence. Pressure-induced vasodilation blockade was associated with increased pressure ulcer formation. Pressure-induced vasodilation was impaired by neuropathy and by the drugs diclofenac and amiloride. CONCLUSIONS This systematic review and meta-analysis indicates that healthy humans have the capacity to increase local perfusion in response to mechanical stress resulting from tissue compression. Because pressure-induced vasodilation is mediated by sensory nerves, pressure-induced vasodilation emphasizes the importance of sensory innervation for durable tissue integrity. Pressure-induced vasodilation impairment seems to provide a complementary explanation for the susceptibility of neuropathic tissues to pressure-induced lesions.
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Affiliation(s)
- Pieter R Zwanenburg
- From the Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam Infection and Immunity, and the Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Center, University of Amsterdam
| | - Sophia F M Backer
- From the Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam Infection and Immunity, and the Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Center, University of Amsterdam
| | - Miryam C Obdeijn
- From the Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam Infection and Immunity, and the Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Center, University of Amsterdam
| | - Oren Lapid
- From the Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam Infection and Immunity, and the Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Center, University of Amsterdam
| | - Sarah L Gans
- From the Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam Infection and Immunity, and the Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Center, University of Amsterdam
| | - Marja A Boermeester
- From the Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam Infection and Immunity, and the Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Center, University of Amsterdam
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11
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Fouchard M, Misery L, Le Garrec R, Sigaudo-Roussel D, Fromy B. Alteration of Pressure-Induced Vasodilation in Aging and Diabetes, a Neuro-Vascular Damage. Front Physiol 2019; 10:862. [PMID: 31333501 PMCID: PMC6616153 DOI: 10.3389/fphys.2019.00862] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 06/20/2019] [Indexed: 12/11/2022] Open
Abstract
Skin is constantly subjected to pressure at different levels. Pressure-induced vasodilation (PIV) is one of the response mechanisms to low pressure that maintains the homeostasis of the skin. PIV results from the interaction of primary afferent nerves and vascular endothelium of skin vessels. Thanks to this cutaneous neuro-vascular interaction, the cutaneous blood flow increase allows the maintenance of an optimal level of oxygenation and minimizes the lack of vascularization of the skin tissue under low pressure. It seems to be associated with the cutaneous protection mechanisms to prevent pressure ulcers. In some contexts, where microangiopathy and neuropathy can occur, such as aging and diabetes, PIV is impaired, leading to a dramatic early decrease in local skin blood flow when low pressure is applied. In aging, PIV alteration is due to endothelial dysfunction, essentially from an alteration of the nitric oxide pathway. In the inflamm-aging context, oxidative stress increases leading to endothelial cell and nerve damages. An age-related sensory neuropathy will exacerbate the alteration of PIV during the aging process. In diabetes, non-controlled hyperglycaemia leads to an increase in several pathological biochemical pathways that involve oxidative stress and can affect PIV. Sorbinil, alagebrium and alpha-lipoic acid are able individually to restore PIV through a possible oxidative stress reduction. Candesartan, an angiotensin II type 1 receptor blocker, is also able to restore PIV and prevent pressure ulcer formation. The possibility of preventing pressure ulcer associated to diabetes and/or aging with the restoration of PIV seems to be a promising research path.
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Affiliation(s)
- Maxime Fouchard
- LIEN, F-29200, University of Brest, Brest, France.,Department of Dermatology, University Hospital of Brest, Brest, France
| | - Laurent Misery
- LIEN, F-29200, University of Brest, Brest, France.,Department of Dermatology, University Hospital of Brest, Brest, France
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12
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Zhou Z, Matsumoto T, Jankowski V, Pernow J, Mustafa SJ, Duncker DJ, Merkus D. Uridine adenosine tetraphosphate and purinergic signaling in cardiovascular system: An update. Pharmacol Res 2019; 141:32-45. [PMID: 30553823 PMCID: PMC6685433 DOI: 10.1016/j.phrs.2018.12.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/26/2018] [Accepted: 12/12/2018] [Indexed: 02/07/2023]
Abstract
Uridine adenosine tetraphosphate (Up4A), biosynthesized by activation of vascular endothelial growth factor receptor (VEGFR) 2, was initially identified as a potent endothelium-derived vasoconstrictor in perfused rat kidney. Subsequently, the effect of Up4A on vascular tone regulation was intensively investigated in arteries isolated from different vascular beds in rodents including rat pulmonary arteries, aortas, mesenteric and renal arteries as well as mouse aortas, in which Up4A produces vascular contraction. In contrast, Up4A produces vascular relaxation in porcine coronary small arteries and rat aortas. Intravenous infusion of Up4A into conscious rats or mice decreases blood pressure, and intravenous bolus injection of Up4A into anesthetized mice increases coronary blood flow, indicating an overall vasodilator influence in vivo. Although Up4A is the first dinucleotide described that contains both purine and pyrimidine moieties, its cardiovascular effects are exerted mainly through activation of purinergic receptors. These effects not only encompass regulation of vascular tone, but also endothelial angiogenesis, smooth muscle cell proliferation and migration, and vascular calcification. Furthermore, this review discusses a potential role for Up4A in cardiovascular pathophysiology, as plasma levels of Up4A are elevated in juvenile hypertensive patients and Up4A-mediated vascular purinergic signaling changes in cardiovascular disease such as hypertension, diabetes, atherosclerosis and myocardial infarction. Better understanding the vascular effect of the novel dinucleotide Up4A and the purinergic signaling mechanisms mediating its effects will enhance its potential as target for treatment of cardiovascular disease.
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Affiliation(s)
- Zhichao Zhou
- Division of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden.
| | - Takayuki Matsumoto
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Tokyo, Japan
| | - Vera Jankowski
- RWTH-Aachen, Institute for Molecular Cardiovascular Research, Aachen, Germany
| | - John Pernow
- Division of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - S Jamal Mustafa
- Department of Physiology, Pharmacology & Neuroscience, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, United States
| | - Dirk J Duncker
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Daphne Merkus
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, Rotterdam, the Netherlands
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13
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Nguyen-Tu MS, Nivoit P, Oréa V, Lemoine S, Acquaviva C, Pagnon-Minot A, Fromy B, Sethi JK, Sigaudo-Roussel D. Inflammation-linked adaptations in dermal microvascular reactivity accompany the development of obesity and type 2 diabetes. Int J Obes (Lond) 2018; 43:556-566. [PMID: 30006585 PMCID: PMC6223541 DOI: 10.1038/s41366-018-0148-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 05/26/2018] [Accepted: 06/08/2018] [Indexed: 01/04/2023]
Abstract
Background/Objectives The increased prevalence of obesity has prompted great strides in our understanding of specific adipose depots and their involvement in cardio-metabolic health. However, the impact of obesity on dermal white adipose tissue (dWAT) and dermal microvascular functionality remains unclear. This study aimed to investigate the temporal changes that occur in dWAT and dermal microvascular functionality during the development of diet-induced obesity and type 2 diabetes in mice. Methods Metabolic phenotyping of a murine model of hypercaloric diet (HCD)-induced obesity and type 2 diabetes was performed at three time points that reflected three distinct stages of disease development; 2 weeks of HCD-overweight-metabolically healthy, 4 weeks of HCD-obese-prediabetic and 12 weeks of HCD-obese-type 2 diabetic mice. Expansion of dWAT was characterized histologically, and changes in dermal microvascular reactivity were assessed in response to pressure and the vasodilators SNP and Ach. Results HCD resulted in a progressive expansion of dWAT and increased expression of pro-inflammatory markers (IL1β and COX-2). Impairments in pressure-induced (PIV) and Ach-induced (endothelium-dependent) vasodilation occurred early, in overweight-metabolically healthy mice. Residual vasodilatory responses were NOS-independent but sensitive to COX inhibition. These changes were associated with reductions in NO and adiponectin bioavailability, and rescued by exogenous adiponectin or hyperinsulinemia. Obese-prediabetic mice continued to exhibit impaired Ach-dependent vasodilation but PIV appeared normalized. This normalization coincided with elevated endogenous adiponectin and insulin levels, and was sensitive to NOS, COX and PI3K, inhibition. In obese-type 2 diabetic mice, both Ach-stimulated and pressure-induced vasodilatory responses were increased through enhanced COX-2-dependent prostaglandin response. Conclusions We demonstrate that the development of obesity, metabolic dysfunction and type 2 diabetes, in HCD-fed mice, is accompanied by increased dermal adiposity and associated metaflammation in dWAT. Importantly, these temporal changes are also linked to disease stage-specific dermal microvascular reactivity, which may reflect adaptive mechanisms driven by metaflammation.
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Affiliation(s)
- Marie-Sophie Nguyen-Tu
- LBTI, UMR CNRS 5305, 69367, Lyon Cedex 07, France.,University of Lyon 1, 69367, Lyon Cedex 07, France
| | - Pierre Nivoit
- LBTI, UMR CNRS 5305, 69367, Lyon Cedex 07, France.,University of Lyon 1, 69367, Lyon Cedex 07, France
| | - Valérie Oréa
- LBTI, UMR CNRS 5305, 69367, Lyon Cedex 07, France.,University of Lyon 1, 69367, Lyon Cedex 07, France
| | | | - Cécile Acquaviva
- LBTI, UMR CNRS 5305, 69367, Lyon Cedex 07, France.,Centre de Biologie et Pathologie Est, University Hospital, Hospices Civils de Lyon, 69677, Bron, France
| | | | - Bérengère Fromy
- LBTI, UMR CNRS 5305, 69367, Lyon Cedex 07, France.,University of Lyon 1, 69367, Lyon Cedex 07, France
| | - Jaswinder K Sethi
- Faculty of Medicine, University of Southampton, Institute of Developmental Sciences Building, Southampton General Hospital, Southampton, SO16 6YD, UK. .,National Institute for Health Research Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton General Hospital, Southampton, SO16 6YD, UK. .,Institute for Life Sciences, Life Sciences Building 85, University of Southampton, Highfield, Southampton, SO17 1BJ, UK.
| | - Dominique Sigaudo-Roussel
- LBTI, UMR CNRS 5305, 69367, Lyon Cedex 07, France. .,University of Lyon 1, 69367, Lyon Cedex 07, France.
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14
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Fromy B, Josset-Lamaugarny A, Aimond G, Pagnon-Minot A, Marics I, Tattersall GJ, Moqrich A, Sigaudo-Roussel D. Disruption of TRPV3 Impairs Heat-Evoked Vasodilation and Thermoregulation: A Critical Role of CGRP. J Invest Dermatol 2018; 138:688-696. [DOI: 10.1016/j.jid.2017.10.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 09/08/2017] [Accepted: 10/08/2017] [Indexed: 12/24/2022]
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15
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Zhou Z, Sorop O, de Beer VJ, Heinonen I, Cheng C, Jan Danser AH, Duncker DJ, Merkus D. Altered purinergic signaling in uridine adenosine tetraphosphate-induced coronary relaxation in swine with metabolic derangement. Purinergic Signal 2017; 13:319-329. [PMID: 28540569 PMCID: PMC5563292 DOI: 10.1007/s11302-017-9563-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 04/24/2017] [Indexed: 12/13/2022] Open
Abstract
We previously demonstrated that uridine adenosine tetraphosphate (Up4A) induces potent and partially endothelium-dependent relaxation in the healthy porcine coronary microvasculature. We subsequently showed that Up4A-induced porcine coronary relaxation was impaired via downregulation of P1 receptors after myocardial infarction. In view of the deleterious effect of metabolic derangement on vascular function, we hypothesized that the coronary vasodilator response to Up4A is impaired in metabolic derangement, and that the involvement of purinergic receptor subtypes and endothelium-derived vasoactive factors (EDVFs) is altered. Coronary small arteries, dissected from the apex of healthy swine and swine 6 months after induction of diabetes with streptozotocin and fed a high-fat diet, were mounted on wire myographs. Up4A (10-9-10-5 M)-induced coronary relaxation was maintained in swine with metabolic derangement compared to normal swine, despite impaired endothelium-dependent relaxation to bradykinin and despite blunted P2X7 receptor and NO-mediated vasodilator influences of Up4A. Moreover, a thromboxane-mediated vasoconstrictor influence was unmasked. In contrast, an increased Up4A-mediated vasodilator influence via P2Y1 receptors was observed, while, in response to Up4A, cytochrome P450 2C9 switched from producing vasoconstrictor to vasodilator metabolites in swine with metabolic derangement. Coronary vascular expression of A2A and P2X7 receptors as well as eNOS, as assessed with real-time PCR, was reduced in swine with metabolic derangement. In conclusion, although the overall coronary vasodilator response to Up4A was maintained in swine with metabolic derangement, the involvement of purinergic receptor subtypes and EDVF was markedly altered, revealing compensatory mechanisms among signaling pathways in Up4A-mediated coronary vasomotor influence in the early phase of metabolic derangement. Future studies are warranted to investigate the effects of severe metabolic derangement on coronary responses to Up4A.
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Affiliation(s)
- Zhichao Zhou
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
- Unit of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Oana Sorop
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Vincent J de Beer
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Ilkka Heinonen
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
- Department of Clinical Physiology and Nuclear Medicine, University of Turku, Turku, Finland
| | - Caroline Cheng
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
- Department of Nephrology & Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - A H Jan Danser
- Division of Pharmacology, Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Dirk J Duncker
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Daphne Merkus
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
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16
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Begey AL, Liu KL, Lo M, Josset-Lamaugarny A, Picard N, Gauthier C, Fromy B, Sigaudo-Roussel D, Dubourg L. Cutaneous and renal vasodilatory response to local pressure application: A comparative study in mice. Microvasc Res 2017; 115:44-51. [PMID: 28859929 DOI: 10.1016/j.mvr.2017.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/23/2017] [Accepted: 08/28/2017] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND AIM We have reported a novel relationship involving mechanical stimulation and vasodilation in rodent and human skin, referred to as pressure-induced vasodilation (PIV). It is unknown whether this mechanism exists in kidney and reflects the microcirculation in deep organs. Therefore, we compared the skin and kidney PIV to determine whether their changes were similar. METHODS In anesthetized mice fed a normal salt-diet, laser Doppler flux (LDF) signals were measured when an increase in local pressure was applied to the surface of the head skin with the rate of 2.2Pa/s (1mmHg/min) and to the left kidney with a rate of 4.4Pa/s (2mmHg/min). The mechanism underlying renal PIV was also investigated. The skin and kidney PIV were also compared during salt load (4% NaCl diet). RESULTS The kidney had higher baseline LDF and vascular conductance compared to those of the skin. Pressure application increased the LDF in the kidney as well as in the skin with a comparable maximal magnitude (about 25% from baseline value), despite different kinetics of PIV evolution. As we previously reported in the skin, the kidney PIV response was mediated by the activation of transient receptor potential vanilloid type 1 channels, the release of calcitonin gene-related peptide, and the participation of prostaglandins and nitric oxide. In the absence of hypertension, high salt intake abolished the cutaneous PIV response and markedly impaired the renal one. CONCLUSION PIV response in the mouse kidney results from a neuro-vascular interaction. Despite some differences between the skin and the kidney PIV, the similarities in their response and signaling mechanisms suggest that the cutaneous microcirculation could reflect, in part, the microcirculation of the renal cortex.
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Affiliation(s)
- Anne-Laure Begey
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France
| | - Kiao Ling Liu
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France; Institute of Pharmaceutical and Biological Sciences, University Lyon 1, France
| | - Ming Lo
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France; Institute of Pharmaceutical and Biological Sciences, University Lyon 1, France
| | - Audrey Josset-Lamaugarny
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France
| | - Nicolas Picard
- ERL 8228, INSERM UMR S1138, Centre de Recherche des Cordeliers, University Paris VI, France
| | - Catherine Gauthier
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France
| | - Berengere Fromy
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France
| | | | - Laurence Dubourg
- Laboratory of Tissue Biology and Therapeutic Engineering, UMR 5305 CNRS, University Lyon 1, France; Néphrologie, Dialyse, Hypertension et Exploration Fonctionnelle Rénale, Groupement Hospitalier Edouard Herriot, Hospices Civils de Lyon, France; University Lyon 1, France.
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17
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Tesselaar E, Nezirevic Dernroth D, Farnebo S. Acute effects of coffee on skin blood flow and microvascular function. Microvasc Res 2017. [PMID: 28625890 DOI: 10.1016/j.mvr.2017.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Studies on the acute effects of coffee on the microcirculation have shown contradicting results. This study aimed to investigate if intake of caffeine-containing coffee changes blood flow and microvascular reactivity in the skin. METHODS We measured acute changes in cutaneous vascular conductance (CVC) in the forearm and the tip of the finger, the microvascular response to transdermal iontophoresis of acetylcholine (ACh) and sodium nitroprusside (SNP) and post-occlusive reactive hyperemia (PORH) in the skin, after intake of caffeinated or decaffeinated coffee. RESULTS Vasodilatation during iontophoresis of ACh was significantly stronger after intake of caffeinated coffee compared to after intake of decaffeinated coffee (1.26±0.20PU/mmHg vs. 1.13±0.38PU/mmHg, P<0.001). Forearm CVC before and after PORH were not affected by caffeinated and decaffeinated coffee. After intake of caffeinated coffee, a more pronounced decrease in CVC in the fingertip was observed compared to after intake of decaffeinated coffee (-1.36PU/mmHg vs. -0.52PU/mmHg, P=0.002). CONCLUSIONS Caffeine, as ingested by drinking caffeinated coffee acutely improves endothelium-dependent microvascular responses in the forearm skin, while endothelium-independent responses to PORH and SNP iontophoresis are not affected. Blood flow in the fingertip decreases markedly during the first hour after drinking caffeinated coffee compared to decaffeinated coffee.
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Affiliation(s)
- Erik Tesselaar
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden; Department of Radiation Physics, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
| | - Dzeneta Nezirevic Dernroth
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden; Department of Clinical Chemistry, Region Östergötland, Linköping, Sweden
| | - Simon Farnebo
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden; Department of Plastic Surgery, Hand Surgery, and Burns, Linköping University, Linköping, Sweden
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18
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Fujii N, McNeely BD, Nishiyasu T, Kenny GP. Prostacyclin does not affect sweating but induces skin vasodilatation to a greater extent in older versus younger women: roles of NO and K Ca channels. Exp Physiol 2017; 102:578-586. [PMID: 28271565 DOI: 10.1113/ep086297] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 03/02/2017] [Indexed: 01/03/2023]
Abstract
NEW FINDINGS What is the central question of this study? It remains unknown whether ageing modulates prostacyclin-induced cutaneous vasodilatation in women. What is the main finding and its importance? Prostacyclin induced cutaneous vasodilatation, albeit the magnitude of increase at lower concentrations of prostacyclin was greater in older relative to young women. This response was associated with greater contributions of nitric oxide synthase and calcium-activated potassium channels. Our results suggest that administration of prostacyclin might be an effective therapy to reverse microvascular hypoperfusion, especially in older women. We previously reported that prostacyclin induces cutaneous vasodilatation but not sweating in younger and older men. Furthermore, we demonstrated that nitric oxide synthase and calcium-activated potassium (KCa ) channels contribute to the prostacyclin-induced cutaneous vasodilatation in younger men, although these contributions are diminished in older men. Given that the effects of ageing might differ between men and women, the above results cannot simply be applied to women. In this study, cutaneous vascular conductance and sweat rate were evaluated in younger (mean ± SD, 22 ± 3 years old) and older (55 ± 7 years old) women (10 per group) at four intradermal forearm skin sites treated as follows: (i) lactated Ringer solution without any drug (control); (ii) 10 mm NG -nitro-l-arginine (l-NNA), a non-specific nitric oxide synthase inhibitor; (iii) 50 mm tetraethylammonium (TEA), a non-specific KCa channel blocker; or (iv) 10 mm l-NNA plus 50 mm TEA. All four sites were co-administered with prostacyclin in an incremental manner (0.04, 0.4, 4, 40 and 400 μm, each for 25 min). Surprisingly, increases in cutaneous vascular conductance in response to 0.04-4 μm prostacyclin were greater in older relative to younger women (all P ≤ 0.05), and these age-related differences were diminished when both l-NNA and TEA were administered simultaneously (all P > 0.05). No effect on sweat rate was observed in either group (all concentrations, P > 0.05). We show that although prostacyclin does not mediate sweating, it induces cutaneous vasodilatation, and this response elicited by lower concentrations of prostacyclin is greater in older relative to younger women. This greater cutaneous vasodilatation in older women is likely to be attributable to nitric oxide synthase- and KCa channel-dependent mechanisms.
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Affiliation(s)
- Naoto Fujii
- Human and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Ontario, Canada.,Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba City, Japan
| | - Brendan D McNeely
- Human and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Ontario, Canada
| | - Takeshi Nishiyasu
- Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba City, Japan
| | - Glen P Kenny
- Human and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Ontario, Canada
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19
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Mihor A, Gergar M, Gaberšček S, Lenasi H. Skin microvascular reactivity in patients with hypothyroidism. Clin Hemorheol Microcirc 2016; 64:105-114. [DOI: 10.3233/ch-162062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Ana Mihor
- Faculty of Medicine, University of Ljubljana, Slovenia
| | - Maša Gergar
- Faculty of Medicine, University of Ljubljana, Slovenia
| | - Simona Gaberšček
- Faculty of Medicine, University of Ljubljana, Slovenia
- Department of Nuclear Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Helena Lenasi
- Institute of Physiology, Faculty of Medicine, University of Ljubljana, Slovenia
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20
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Sauvet F, Drogou C, Bougard C, Arnal PJ, Dispersyn G, Bourrilhon C, Rabat A, Van Beers P, Gomez-Merino D, Faraut B, Leger D, Chennaoui M. Vascular response to 1 week of sleep restriction in healthy subjects. A metabolic response? Int J Cardiol 2015; 190:246-55. [PMID: 25932797 DOI: 10.1016/j.ijcard.2015.04.119] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 03/02/2015] [Accepted: 04/15/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Sleep loss may induce endothelial dysfunction, a key factor in cardiovascular risk. We examined the endothelial function during one week of sleep restriction and a recovery period (from 3-to-13 days) in healthy subjects, and its link to autonomic, inflammatory and/or endocrine responses. METHODS 12 men were followed at baseline (B1, 8-h sleep), after 2 (SR2) and 6 (SR6) days of SR (4-h sleep: 02:00-06:00) and after 1 (R1) and 12 (R12) recovery nights (8h sleep). At 10:00, we assessed changes in: arm cutaneous vascular conductance (CVC) induced by local application of methacholine (MCh), cathodal current (CIV) and heat (44°C), finger CVC and skin temperature (Tfi) during local cold exposure (5°C, 20-min) and passive recovery (22°C, 20-min). Blood samples were collected at 08:00. RESULTS Compared with baseline (B1), MCh and heat-induced maximal CVC values (CVC peak) were decreased at SR6 and R1. No effect of SR was observed for Tfi and CVC during immersion whereas these values were lower during passive recovery on SR6 and R1. From SR2 to R12, plasma concentrations of insulin, IGF-1 (total and free) and MCP-1 were significantly increased while those of testosterone and prolactin were decreased. Whole-blood blood mRNA concentrations of TNF-α and IL-1β were higher than B1. No changes in noradrenaline concentrations, heart rate and blood pressure were observed. CONCLUSIONS These results demonstrate that SR reduces endothelial-dependent vasodilatation and local tolerance to cold. This endothelial dysfunction is independent of blood pressure and sympathetic activity but associated with inflammatory and metabolic pathway responses (ClinicalTrials-NCT01989741).
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Affiliation(s)
- Fabien Sauvet
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France.
| | - Catherine Drogou
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
| | - Clément Bougard
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
| | - Pierrick J Arnal
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France; Université de Lyon, Laboratoire de Physiologie de l'Exercice, Saint Etienne, France
| | - Garance Dispersyn
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
| | - Cyprien Bourrilhon
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France
| | - Arnaud Rabat
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
| | - Pascal Van Beers
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
| | - Danielle Gomez-Merino
- Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
| | - Brice Faraut
- Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France; Centre du Sommeil et de la Vigilance, Hôtel Dieu, APHP, Paris, France
| | - Damien Leger
- Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France; Centre du Sommeil et de la Vigilance, Hôtel Dieu, APHP, Paris, France
| | - Mounir Chennaoui
- Institut de recherche biomédicale des armées(IRBA), Brétigny-sur-Orge, France; Université Paris Descartes, Hôtel Dieu, EA7330 VIFASOM (Vigilance, Fatigue, SOmmeil), Paris, France
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Bergstrand S, Källman U, Ek AC, Lindberg LG, Engström M, Sjöberg F, Lindgren M. Pressure-induced Vasodilation and Reactive Hyperemia at Different Depths in Sacral Tissue Under Clinically Relevant Conditions. Microcirculation 2014; 21:761-71. [DOI: 10.1111/micc.12160] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 07/31/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Sara Bergstrand
- Department of Hand Surgery, Plastic Surgery and Burns and Department of Medical and Health Sciences; Linköping University; Linköping Sweden
| | - Ulrika Källman
- Department of Medical and Health Sciences; Linköping University; Linköping Sweden
- Department of Dermatology; Södra Älvsborgs Sjukhus; Borås Sweden
| | - Anna-Christina Ek
- Department of Medical and Health Sciences; Linköping University; Linköping Sweden
| | - Lars-Göran Lindberg
- Department of Biomedical Engineering; Linköping University; Linköping Sweden
| | - Maria Engström
- Department of Medical and Health Sciences; Linköping University; Linköping Sweden
| | - Folke Sjöberg
- Department of Clinical and Experimental Medicine; Linköping University; Linköping Sweden
| | - Margareta Lindgren
- Department of Medical and Health Sciences; Linköping University; Linköping Sweden
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Sauvet F, Florence G, Van Beers P, Drogou C, Lagrume C, Chaumes C, Ciret S, Leftheriotis G, Chennaoui M. Total sleep deprivation alters endothelial function in rats: a nonsympathetic mechanism. Sleep 2014; 37:465-73. [PMID: 24587568 DOI: 10.5665/sleep.3476] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
STUDY OBJECTIVES Sleep loss is suspected to induce endothelial dysfunction, a key factor in cardiovascular risk. We examined whether sympathetic activity is involved in the endothelial dysfunction caused by total sleep deprivation (TSD). DESIGN TWO GROUPS: TSD (24-h wakefulness), using slowly rotating wheels, and wheel control (WC). PARTICIPANTS Seven-month-old male Wistar rats. INTERVENTIONS Pharmacological sympathectomy (reserpine, 5 mg/kg, intraperitoneal), nitric oxide synthase (NOS) inhibition (N (G)-nitro-L-arginine, 20 mg/kg, intraperitoneally 30 min before experiment) and cyclooxygenase (COX) inhibition (indomethacin, 5 mg/kg, intraperitoneally 30 min before experiment). MEASUREMENTS AND RESULTS In protocol 1, changes in heart rate (HR) and blood pressure were continuously recorded in the sympathectomized and non-sympathectomized rats. Blood pressure and HR increased during TSD in non-sympathectomized rats. In protocol 2, changes in skin blood flow (vasodilation) were assessed in the sympathectomized and non-sympathectomized rats using laser-Doppler flowmetry coupled with iontophoretic delivery of acetylcholine (ACh), sodium nitroprusside (SNP), and anodal and cathodal currents. ACh- and cathodal current-induced vasodilations were significantly attenuated after TSD in non-sympathectomized and sympathectomized rats (51% and 60%, respectively). In protocol 3, ACh-induced vasodilation was attenuated after NOS and COX inhibition (66% and 49%, respectively). Cathodal current-induced vasodilation decreased by 40% after COX inhibition. In TSD compared to WC a decrease in ACh-induced vasodilation was still observed after COX inhibition. No changes in SNP- and anodal current-induced vasodilation were detected. CONCLUSION These results demonstrate that total sleep deprivation induces a reduction in endothelial-dependent vasodilation. This endothelial dysfunction is independent of blood pressure and sympathetic activity but associated with nitric oxide synthase and cyclooxygenase pathway alterations.
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Affiliation(s)
- Fabien Sauvet
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Geneviève Florence
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Pascal Van Beers
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Catherine Drogou
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Christophe Lagrume
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Cyrielle Chaumes
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Sylvain Ciret
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
| | - Georges Leftheriotis
- University of Angers, Angers, France ; Unité mixte Centre National de la Recherche Scientifique (CNRS) 6214 - Institut National de la Santé et de la Recherche Médicale (INSERM) 771, Angers, France
| | - Mounir Chennaoui
- Armed Forces Biomedical Research Institute (IRBA), Brétigny-sur-Orge, France
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Decorps J, Saumet JL, Sommer P, Sigaudo-Roussel D, Fromy B. Effect of ageing on tactile transduction processes. Ageing Res Rev 2014; 13:90-9. [PMID: 24373814 DOI: 10.1016/j.arr.2013.12.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 12/02/2013] [Accepted: 12/16/2013] [Indexed: 01/09/2023]
Abstract
With advancing age, a decline in the main sensory modalities including touch sensation and perception is well reported to occur. This review mainly outlines the peripheral components of touch perception highlighting ageing influences on morphological and functional features of cutaneous mechanical transducers and mechanosensitive ion channels, sensory innervation, neurotransmitters and even vascular system required to ensure efferent function of the afferent nerve fibres in the skin. This, in conjunction with effect of ageing on the skin per se and central nervous system, could explain the tactile deficit seen among the ageing population. We also discuss appropriate tools and experimental models available to study the age-related tactile decline.
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Affiliation(s)
- Johanna Decorps
- Laboratory of Tissue Biology and Therapeutic Engineering, Centre National de la Recherche Scientifique (CNRS) UMR 5305, Lyon, France; University of Lyon 1, UMR 5305, Lyon, France.
| | - Jean Louis Saumet
- Laboratory of Tissue Biology and Therapeutic Engineering, Centre National de la Recherche Scientifique (CNRS) UMR 5305, Lyon, France; University of Lyon 1, UMR 5305, Lyon, France.
| | - Pascal Sommer
- Laboratory of Tissue Biology and Therapeutic Engineering, Centre National de la Recherche Scientifique (CNRS) UMR 5305, Lyon, France; University of Lyon 1, UMR 5305, Lyon, France.
| | - Dominique Sigaudo-Roussel
- Laboratory of Tissue Biology and Therapeutic Engineering, Centre National de la Recherche Scientifique (CNRS) UMR 5305, Lyon, France; University of Lyon 1, UMR 5305, Lyon, France.
| | - Berengere Fromy
- Laboratory of Tissue Biology and Therapeutic Engineering, Centre National de la Recherche Scientifique (CNRS) UMR 5305, Lyon, France; University of Lyon 1, UMR 5305, Lyon, France.
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Rousseau P, Mahé G. [Endothelial function: role, assessment and limits]. ACTA ACUST UNITED AC 2013; 39:47-56. [PMID: 24355615 DOI: 10.1016/j.jmv.2013.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 10/24/2013] [Indexed: 12/16/2022]
Abstract
For several years, detecting and preventing cardiovascular diseases have become a major issue. Different methods have been developed to evaluate endothelial function. Endothelial dysfunction is one of the first steps leading to atherosclerosis. This review presents an insight into endothelial function, the interests of its assessment and methods for studying endothelial function. To date, the vascular endothelium must be considered as a specific organ with its own functions that contribute to the homeostasis of the cardiovascular system. Endothelial dysfunction typically corresponds to a decrease of nitric oxide NO bioavailability. Biological or physico-chemical methods may be used to assess dysfunction. Biological methods allow measuring NO metabolites and pro-inflammatory and vasoconstrictor mediators released by the endothelium. The physico-chemical methods include intra-coronary injections, plethysmography, flow-mediated dilation (FMD), digital plethysmography and optical techniques using laser (laser Doppler single-point, laser Doppler imager, laser speckle contrast imaging) that can be coupled with provocation tests (iontophoresis, microdialysis, post-ischemic hyperemia, local heating). The principle of each technique and its use in clinical practice are discussed. Studying endothelial dysfunction is a particularly promising field because of new drugs being developed. Nevertheless, assessment methodology still needs further development to enable reliable, non-invasive, reproducible, and inexpensive ways to analyze endothelial dysfunction.
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Affiliation(s)
- C Puissant
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - P Abraham
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France; Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France
| | - S Durand
- EA 4334 motricity, interactions, and performance, LUNAM université, université du Maine, 72085 Le Mans cedex 9, France
| | - A Humeau-Heurtier
- Laboratoire d'ingénierie des systèmes automatisés (LISA), LUNAM université, université d'Angers, 49000 Angers, France
| | - S Faure
- Stress oxydant et pathologies métaboliques (SOPAM), Inserm U1063, LUNAM université, université d'Angers, 40045 Angers, France
| | - P Rousseau
- Département de chirurgie plastique, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - G Mahé
- Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France; Pôle imagerie médicale, centre hospitalier universitaire Pontchaillou, 2, avenue du Pr-Léon-Bernard, 35033 Rennes cedex 9, France.
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El Assar M, Angulo J, Rodríguez-Mañas L. Oxidative stress and vascular inflammation in aging. Free Radic Biol Med 2013; 65:380-401. [PMID: 23851032 DOI: 10.1016/j.freeradbiomed.2013.07.003] [Citation(s) in RCA: 412] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 06/28/2013] [Accepted: 07/02/2013] [Indexed: 12/13/2022]
Abstract
Vascular aging, a determinant factor for cardiovascular disease and health status in the elderly, is now viewed as a modifiable risk factor. Impaired endothelial vasodilation is a early hallmark of arterial aging that precedes the clinical manifestations of vascular dysfunction, the first step to cardiovascular disease and influencing vascular outcomes in the elderly. Accordingly, the preservation of endothelial function is thought to be an essential determinant of healthy aging. With special attention on the effects of aging on the endothelial function, this review is focused on the two main mechanisms of aging-related endothelial dysfunction: oxidative stress and inflammation. Aging vasculature generates an excess of the reactive oxygen species (ROS), superoxide and hydrogen peroxide, that compromise the vasodilatory activity of nitric oxide (NO) and facilitate the formation of the deleterious radical, peroxynitrite. Main sources of ROS are mitochondrial respiratory chain and NADPH oxidases, although NOS uncoupling could also account for ROS generation. In addition, reduced antioxidant response mediated by erythroid-2-related factor-2 (Nrf2) and downregulation of mitochondrial manganese superoxide dismutase (SOD2) contributes to the establishment of chronic oxidative stress in aged vessels. This is accompanied by a chronic low-grade inflammatory phenotype that participates in defective endothelial vasodilation. The redox-sensitive transcription factor, nuclear factor-κB (NF-κB), is upregulated in vascular cells from old subjects and drives a proinflammatory shift that feedbacks oxidative stress. This chronic NF-κB activation is contributed by increased angiotensin-II signaling and downregulated sirtuins and precludes adequate cellular response to acute ROS generation. Interventions targeted to recover endogenous antioxidant capacity and cellular stress response rather than exogenous antioxidants could reverse oxidative stress-inflammation vicious cycle in vascular aging. Lifestyle attitudes such as caloric restriction and exercise training appear as effective ways to overcome defective antioxidant response and inflammation, favoring successful vascular aging and decreasing the risk for cardiovascular disease.
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Affiliation(s)
- Mariam El Assar
- Fundación para la Investigación Biomédica, Hospital Universitario de Getafe, Getafe, Spain
| | - Javier Angulo
- Instituto Ramón y Cajal de Investigación Sanitaria, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Leocadio Rodríguez-Mañas
- Fundación para la Investigación Biomédica, Hospital Universitario de Getafe, Getafe, Spain; Servicio de Geriatría, Hospital Universitario de Getafe, Getafe, Spain.
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Lefthériotis G, Rousseau P, Mahé G. Reproducibility of non-invasive assessment of skin endothelial function using laser Doppler flowmetry and laser speckle contrast imaging. PLoS One 2013; 8:e61320. [PMID: 23620742 PMCID: PMC3631172 DOI: 10.1371/journal.pone.0061320] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 03/07/2013] [Indexed: 11/26/2022] Open
Abstract
Background Endothelial dysfunction precedes atherosclerosis. Vasodilation induced by acetylcholine (ACh) is a specific test of endothelial function. Reproducibility of laser techniques such as laser-Doppler-flowmetry (LDF) and Laser-speckle-contrast-imaging (LSCI) to detect ACh vasodilation is debated and results expressions lack standardization. We aimed to study at a 7-day interval (i) the inter-subject reproducibility, (ii) the intra-subjects reproducibility, and (iii) the effect of the results expressions over variability. Methods and Results Using LDF and LSCI simultaneously, we performed two different ACh-iontophoresis protocols. The maximal ACh vasodilation (peak-ACh) was expressed as absolute or normalized flow or conductance values. Inter-subject reproducibility was expressed as coefficient of variation (inter-CV,%). Intra-subject reproducibility was expressed as within subject coefficients of variation (intra-CV,%), and intra-class correlation coefficients (ICC). Fifteen healthy subjects were included. The inter-subject reproducibility of peak-ACh depended upon the expression of the results and ranged from 55% to 162% for LDF and from 17% to 83% for LSCI. The intra-subject reproducibility (intra-CV/ICC) of peak-ACh was reduced when assessed with LSCI compared to LDF no matter how the results were expressed and whatever the protocol used. The highest intra-subject reproducibility was found using LSCI. It was 18.7%/0.87 for a single current stimulation (expressed as cutaneous vascular conductance) and 11.4%/0.61 for multiple current stimulations (expressed as absolute value). Conclusion ACh-iontophoresis coupled with LSCI is a promising test to assess endothelial function because it is reproducible, safe, and non-invasive. N°: NCT01664572.
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Affiliation(s)
- Cyril Puissant
- Laboratory of Vascular Investigations, University Hospital, Angers, France
| | - Pierre Abraham
- Laboratory of Vascular Investigations, University Hospital, Angers, France
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
| | - Sylvain Durand
- EA 4334 Motricity, Interactions, and Performance, LUNAM University, University du Maine, Le Mans, France
| | - Anne Humeau-Heurtier
- LISA – Laboratoire d'Ingénierie des Systèmes Automatisés, LUNAM University, University of Angers, Angers, France
| | - Sébastien Faure
- INSERM U1063, Stress oxydant et pathologies métaboliques (SOPAM), LUNAM University, University of Angers, Angers, France
| | - Georges Lefthériotis
- Laboratory of Vascular Investigations, University Hospital, Angers, France
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
| | - Pascal Rousseau
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
- Department of Plastic Surgery, University Hospital, Angers, France
| | - Guillaume Mahé
- Laboratory of Vascular Investigations, University Hospital, Angers, France
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
- * E-mail:
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Longitudinal assessment of endothelial function in the microvasculature of mice in-vivo. Microvasc Res 2013; 85:86-92. [DOI: 10.1016/j.mvr.2012.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/08/2012] [Accepted: 10/10/2012] [Indexed: 11/23/2022]
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El Assar M, Angulo J, Vallejo S, Peiró C, Sánchez-Ferrer CF, Rodríguez-Mañas L. Mechanisms involved in the aging-induced vascular dysfunction. Front Physiol 2012; 3:132. [PMID: 22783194 PMCID: PMC3361078 DOI: 10.3389/fphys.2012.00132] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 04/20/2012] [Indexed: 12/25/2022] Open
Abstract
Vascular aging is a key process determining health status of aged population. Aging is an independent cardiovascular risk factor associated to an impairment of endothelial function, which is a very early and important event leading to cardiovascular disease. Vascular aging, formerly being considered an immutable and inexorable risk factor, is now viewed as a target process for intervention in order to achieve a healthier old age. A further knowledge of the mechanisms underlying the age-related vascular dysfunction is required to design an adequate therapeutic strategy to prevent or restore this impairment of vascular functionality. Among the proposed mechanisms that contribute to age-dependent endothelial dysfunction, this review is focused on the following aspects occurring into the vascular wall: (1) the reduction of nitric oxide (NO) bioavailability, caused by diminished NO synthesis and/or by augmented NO scavenging due to oxidative stress, leading to peroxynitrite formation (ONOO(-)); (2) the possible sources involved in the enhancement of oxidative stress; (3) the increased activity of vasoconstrictor factors; and (4) the development of a low-grade pro-inflammatory environment. Synergisms and interactions between all these pathways are also analyzed. Finally, a brief summary of some cellular mechanisms related to endothelial cell senescence (including telomere and telomerase, stress-induced senescence, as well as sirtuins) are implemented, as they are likely involved in the age-dependent endothelial dysfunction, as well as in the lower vascular repairing capacity observed in the elderly. Prevention or reversion of those mechanisms leading to endothelial dysfunction through life style modifications or pharmacological interventions could markedly improve cardiovascular health in older people.
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Affiliation(s)
- Mariam El Assar
- Fundación para la Investigación Biomédica, Hospital Universitario de Getafe Madrid, Spain
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Fleenor BS, Seals DR, Zigler ML, Sindler AL. Superoxide-lowering therapy with TEMPOL reverses arterial dysfunction with aging in mice. Aging Cell 2012; 11:269-76. [PMID: 22168264 DOI: 10.1111/j.1474-9726.2011.00783.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
To test the hypothesis that the antioxidant enzyme superoxide dismutase (SOD) mimetic TEMPOL improves arterial aging, young (Y, 4-6 months) and old (O, 26-28 months) male C57BL6 mice received regular or TEMPOL-supplemented (1mM) drinking water for 3 weeks (n = 8 per group). Aortic superoxide was 65% greater in O (P < 0.05 vs. Y), which was normalized by TEMPOL. O had large elastic artery stiffening, as indicated by greater aortic pulse wave velocity (aPWV, 508 ± 22 vs. 418 ± 22 AU), which was associated with increased adventitial collagen I expression (P < 0.05 vs. Y). TEMPOL reversed the age-associated increases in aPWV (434 ± 21 AU) and collagen in vivo, and SOD reversed the increases in collagen I in adventitial fibroblasts from older rats in vitro. Isolated carotid arteries of O had impaired endothelial function as indicated by reduced acetylcholine-stimulated endothelium-dependent dilation (EDD) (75.6 ± 3.2 vs. 94.5 ± 2.0%) mediated by reduced nitric oxide (NO) bioavailability (L-NAME) associated with decreased endothelial NO synthase (eNOS) expression (P < 0.05 vs. Y). TEMPOL restored EDD (94.5 ± 1.4%), NO bioavailability and eNOS in O. Nitrotyrosine and expression of NADPH oxidase were ~100-200% greater, and MnSOD was ~75% lower in O (P < 0.05 vs. Y). TEMPOL normalized nitrotyrosine and NADPH oxidase in O, without affecting MnSOD. Aortic pro-inflammatory cytokines were greater in O (P < 0.05 vs. Y) and normalized by TEMPOL. Short-term treatment of excessive superoxide with TEMPOL ameliorates large elastic artery stiffening and endothelial dysfunction with aging, and this is associated with normalization of arterial collagen I, eNOS, oxidative stress, and inflammation.
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Affiliation(s)
- Bradley S Fleenor
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA.
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Mahé G, Humeau-Heurtier A, Durand S, Leftheriotis G, Abraham P. Assessment of Skin Microvascular Function and Dysfunction With Laser Speckle Contrast Imaging. Circ Cardiovasc Imaging 2012; 5:155-63. [DOI: 10.1161/circimaging.111.970418] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Guillaume Mahé
- From the Laboratory of Vascular Investigations, University Hospital of Angers and Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI)-Unité mixte UMR CNRS 6214/INSERM 771, Faculté de Médecine, Angers, France (G.M., G.L., P.A.); Laboratoire d'Ingénierie des Systèmes Automatisés (LISA), Université d'Angers, Angers, France (A.H.-H.); and Laboratory “Motricité, Interactions, Performance” EA 4334, University of Le Mans, Faculty of Sport Sciences, Le Mans, France (S.D.)
| | - Anne Humeau-Heurtier
- From the Laboratory of Vascular Investigations, University Hospital of Angers and Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI)-Unité mixte UMR CNRS 6214/INSERM 771, Faculté de Médecine, Angers, France (G.M., G.L., P.A.); Laboratoire d'Ingénierie des Systèmes Automatisés (LISA), Université d'Angers, Angers, France (A.H.-H.); and Laboratory “Motricité, Interactions, Performance” EA 4334, University of Le Mans, Faculty of Sport Sciences, Le Mans, France (S.D.)
| | - Sylvain Durand
- From the Laboratory of Vascular Investigations, University Hospital of Angers and Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI)-Unité mixte UMR CNRS 6214/INSERM 771, Faculté de Médecine, Angers, France (G.M., G.L., P.A.); Laboratoire d'Ingénierie des Systèmes Automatisés (LISA), Université d'Angers, Angers, France (A.H.-H.); and Laboratory “Motricité, Interactions, Performance” EA 4334, University of Le Mans, Faculty of Sport Sciences, Le Mans, France (S.D.)
| | - Georges Leftheriotis
- From the Laboratory of Vascular Investigations, University Hospital of Angers and Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI)-Unité mixte UMR CNRS 6214/INSERM 771, Faculté de Médecine, Angers, France (G.M., G.L., P.A.); Laboratoire d'Ingénierie des Systèmes Automatisés (LISA), Université d'Angers, Angers, France (A.H.-H.); and Laboratory “Motricité, Interactions, Performance” EA 4334, University of Le Mans, Faculty of Sport Sciences, Le Mans, France (S.D.)
| | - Pierre Abraham
- From the Laboratory of Vascular Investigations, University Hospital of Angers and Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI)-Unité mixte UMR CNRS 6214/INSERM 771, Faculté de Médecine, Angers, France (G.M., G.L., P.A.); Laboratoire d'Ingénierie des Systèmes Automatisés (LISA), Université d'Angers, Angers, France (A.H.-H.); and Laboratory “Motricité, Interactions, Performance” EA 4334, University of Le Mans, Faculty of Sport Sciences, Le Mans, France (S.D.)
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CLOUGH GERALDINEF, NORMAN MIKAEL. The Microcirculation: A Target for Developmental Priming. Microcirculation 2011; 18:286-97. [DOI: 10.1111/j.1549-8719.2011.00087.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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What Can Current Stimulation Tell Us about the Vascular Function of Endogenous Prostacyclin in Healthy Rat Skin In Vivo? J Invest Dermatol 2011; 131:237-44. [DOI: 10.1038/jid.2010.267] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Colberg SR, Hill LC, Parson HK, Thomas KS, Vinik AI. Aerobic training increases skin perfusion by a nitric oxide mechanism in type 2 diabetes. Diabetes Metab Syndr Obes 2010; 3:275-80. [PMID: 21437095 PMCID: PMC3047977 DOI: 10.2147/dmsott.s12136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
It is well known that a number of locally released vasodilatory and vasoconstrictive compounds can affect skin perfusion. This study investigated the effects of aerobic training on the contribution of nitric oxide (NO), prostaglandins (PG), and endothelial-derived hyperpolarizing factor (EDHF) in stimulated dorsal foot skin perfusion in individuals with type 2 diabetes (T2DM). Ten previously sedentary, older individuals with T2DM (57.0 ± 3.1 years) and nine sedentary controls (53.5 ± 3.2 years) were tested before and after undertaking six months of moderate aerobic training three times weekly in a supervised setting. All subjects underwent measurement of baseline (32°C) and heat-stimulated (40°C and 44°C) dorsal foot skin perfusion starting one hour after ingestion of a single, oral 325 mg dose of aspirin, a known inhibitor of PG synthesis. Before aspirin ingestion, a subcutaneous microdialysis probe was inserted into each foot dorsum to administer either saline (PG pathway only blocked by aspirin in the left foot) or L-NAME (N(G)-nitro-l-arginine methyl ester; thereby inhibiting both PG and NO pathways in the right foot). Normative data collected previously on subjects undergoing saline administration via microdialysis without aspirin ingestion served as a control group. Significantly lower responsiveness of maximal perfusion was found with the EDHF pathway alone unblocked compared with NO and EDHF unblocked after training. Maximal suppression attributable directly to NO, PG, and EDHF was not significantly different when examined by subject group and training status. However, contributions of NO, PG, and EDHF to maximal perfusion were significantly increased, decreased, and unchanged by aerobic training, respectively, with diabetic and control subjects combined due to nonsignificant differences between groups. Improvements in maximally stimulated dorsal foot skin perfusion resulting from six months of aerobic training appear to have primarily an NO basis, with lesser contributions from PG following training, regardless of diabetes status.
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Affiliation(s)
- Sheri R Colberg
- Old Dominion University, Norfolk, Virginia, USA
- Correspondence: Sheri Colberg, Human Movement Sciences Department, Old Dominion University, Norfolk, VA 23529, USA, Tel +1 757 683 3356, Fax +1 757 683 4270, Email
| | - Laura C Hill
- State University of New York at Cortland, New York, USA
| | | | | | - Aaron I Vinik
- Eastern Virginia Medical School, Norfolk, Virginia, USA
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Chadha PS, Haddock RE, Howitt L, Morris MJ, Murphy TV, Grayson TH, Sandow SL. Obesity Up-Regulates Intermediate Conductance Calcium-Activated Potassium Channels and Myoendothelial Gap Junctions to Maintain Endothelial Vasodilator Function. J Pharmacol Exp Ther 2010; 335:284-93. [DOI: 10.1124/jpet.110.167593] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Obesity and aging: determinants of endothelial cell dysfunction and atherosclerosis. Pflugers Arch 2010; 460:825-37. [DOI: 10.1007/s00424-010-0860-y] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2010] [Accepted: 06/17/2010] [Indexed: 02/02/2023]
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Ikeyama K, Denda S, Tsutsumi M, Denda M. Neuronal Nitric Oxide Synthase in Epidermis Is Involved in Cutaneous Circulatory Response to Mechanical Stimulation. J Invest Dermatol 2010; 130:1158-66. [DOI: 10.1038/jid.2009.350] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Herrera MD, Mingorance C, Rodríguez-Rodríguez R, Alvarez de Sotomayor M. Endothelial dysfunction and aging: an update. Ageing Res Rev 2010; 9:142-52. [PMID: 19619671 DOI: 10.1016/j.arr.2009.07.002] [Citation(s) in RCA: 208] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 07/09/2009] [Accepted: 07/10/2009] [Indexed: 12/19/2022]
Abstract
Aging is an important risk factor for the development of many cardiovascular diseases as atherosclerosis and hypertension with a common underlying circumstance: the progressive decline of endothelial function. Vascular endothelial dysfunction occurs during the human aging process and is accompanied by deterioration in the balance between vasodilator and vasoconstriction substances produced by the endothelium. This imbalance is mainly characterized by a progressive reduction of the bioavailability of nitric oxide (NO) and an increase in the production of cyclooxygenase (COX)-derived vasoconstrictor factors. Both circumstances are in turn related to an increased production of reactive oxygen and nitrogen species. The aim of this review is to describe the pathophysiological mechanisms involved in the endothelial function declination that accompanies the multifactorial aging process, including alterations related to oxidative stress and pro-inflammatory cytokines, senescence of endothelial cells and genetic factors.
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Affiliation(s)
- María Dolores Herrera
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, C/Profesor García González 2, 41012 Seville, Spain.
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Fromy B, Sigaudo-Roussel D, Gaubert-Dahan ML, Rousseau P, Abraham P, Benzoni D, Berrut G, Saumet JL. Aging-Associated Sensory Neuropathy Alters Pressure-Induced Vasodilation in Humans. J Invest Dermatol 2010; 130:849-55. [DOI: 10.1038/jid.2009.279] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sauvet F, Leftheriotis G, Gomez-Merino D, Langrume C, Drogou C, Van Beers P, Bourrilhon C, Florence G, Chennaoui M. Effect of acute sleep deprivation on vascular function in healthy subjects. J Appl Physiol (1985) 2010; 108:68-75. [DOI: 10.1152/japplphysiol.00851.2009] [Citation(s) in RCA: 160] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Sleep disorders are associated with inflammation and sympathetic activation, which are suspected to induce endothelial dysfunction, a key factor in the increased risk of cardiovascular disease. Less is known about the early effects of acute sleep deprivation on vascular function. We evaluated microvascular reactivity and biological markers of endothelial activation during continuous 40 h of total sleep deprivation (TSD) in 12 healthy men (29 ± 3 yr). The days before [ day 1 (D1)] and during TSD (D3), at 1200 and 1800, endothelium-dependent and -independent cutaneous vascular conductance was assessed by iontophoresis of acetylcholine and sodium nitroprusside, respectively, coupled to laser-Doppler flowmetry. At 0900, 1200, 1500, and 1800, heart rate (HR) and instantaneous blood pressure (BP) were recorded in the supine position. At D1, D3, and the day after one night of sleep recovery (D4), markers of vascular endothelial cell activation, including soluble intercellular adhesion molecule-1, vascular cell adhesion molecule-1, E-selectin, and interleukin-6 were measured from blood samples at 0800. Compared with D1, plasma levels of E-selectin were raised at D3, whereas intercellular adhesion molecule-1 and interleukin-6 were raised at D4 ( P < 0.05). The endothelium-dependent and -independent CVC were significantly decreased after 29 h of TSD ( P < 0.05). By contrast, HR, systolic BP, and the normalized low-frequency component of HR variability (0.04–0.15 Hz), a marker of the sympathetic activity, increased significantly within 32 h of TSD ( P < 0.05). In conclusion, acute exposure to 40 h of TSD appears to cause vascular dysfunction before the increase in sympathetic activity and systolic BP.
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Affiliation(s)
- Fabien Sauvet
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Georges Leftheriotis
- Université d'Angers, Unité Mixte Centre National de la Recherche Scientifique 6214-Institut National de la Santé et de la Recherche Médicale 771, Angers, France
| | - Danièlle Gomez-Merino
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Christophe Langrume
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Catherine Drogou
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Pascal Van Beers
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Cyprien Bourrilhon
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Geneviève Florence
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
| | - Mounir Chennaoui
- Institut de Recherche Biomédicale des Armées, Département des Environnements Opérationnels, Brétigny sur Orge; and
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Syyong HT, Chung AWY, Yang HHC, van Breemen C. Dysfunction of endothelial and smooth muscle cells in small arteries of a mouse model of Marfan syndrome. Br J Pharmacol 2009; 158:1597-608. [PMID: 19814726 DOI: 10.1111/j.1476-5381.2009.00439.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Marfan syndrome, a connective tissue disorder caused by mutations in FBN1 encoding fibrillin-1, results in life-threatening complications in the aorta, but little is known about its effects in resistance vasculature. EXPERIMENTAL APPROACH Second-order mesenteric arteries from mice at 3, 6 and 10 months of age (n= 30) heterozygous for the Fbn1 allele encoding a cysteine substitution (Fbn1(C1039G/+)) were compared with those from age-matched control littermates. KEY RESULTS Stress-strain curves indicated that arterial stiffness was increased at 6 and 10 months of age in Marfan vessels. Isometric force measurement revealed that contraction in response to potassium (60 mM)-induced membrane depolarization was decreased by at least 28% in Marfan vessels at all ages, while phenylephrine (3 microM)-induced contraction was reduced by at least 40% from 6 months. Acetylcholine-induced relaxation in Marfan vessels was reduced to 70% and 45% of control values, respectively, at 6 and 10 months. Sensitivity to sodium nitroprusside was reduced at 6 months (pEC(50)= 5.64 +/- 0.11, control pEC(50)= 7.34 +/- 0.04) and 10 months (pEC(50)= 5.99 +/- 0.07, control pEC(50)= 6.99 +/- 0.14). Pretreatment with N(omega)-Nitro-L-arginine methyl ester (200 microM) had no effect on acetylcholine-induced relaxation in Marfan vessels, but reduced vasorelaxation in control vessels to 57% of control values. Addition of indomethacin (10 microM) and catalase (1000 U.mL(-1)) further inhibited vasorelaxation in Marfan vessels to a greater degree compared with control vessels. CONCLUSIONS AND IMPLICATIONS Pathogenesis of Marfan syndrome in resistance-sized arteries increases stiffness and impairs vasomotor function.
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Affiliation(s)
- H T Syyong
- Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, Vancouver, Canada
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Lenasi H. The role of nitric oxide- and prostacyclin-independent vasodilatation in the human cutaneous microcirculation: effect of cytochrome P450 2C9 inhibition. Clin Physiol Funct Imaging 2009; 29:263-70. [DOI: 10.1111/j.1475-097x.2009.00862.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mecanismos implicados en la disfunción endotelial asociada al envejecimiento. Med Clin (Barc) 2009; 132:62-9. [DOI: 10.1016/j.medcli.2008.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 09/17/2008] [Indexed: 11/21/2022]
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Hojs N, Strucl M, Cankar K. The effect of glibenclamide on acetylcholine and sodium nitroprusside induced vasodilatation in human cutaneous microcirculation. Clin Physiol Funct Imaging 2009; 29:38-44. [DOI: 10.1111/j.1475-097x.2008.00833.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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