English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/196657
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

High fat diet blunts the effects of leptin on ventilation and on carotid body activity

AuthorsRibeiro, Maria J.; Sacramento, Joana F.; Gallego-Martin, Teresa ; Olea, Elena ; Melo, Bernardete F.; Guarino, Maria P.; Yubero, Sara ; Obeso, Ana ; Conde, Silvia V.
Issue Date2018
PublisherJohn Wiley & Sons
Physiological Society (Great Britain)
CitationJournal of Physiology 596(15): 3187-3199 (2018)
AbstractLeptin plays a role in the control of breathing, acting mainly on central nervous system structures. Leptin receptors are expressed in the carotid body (CB) and this finding has been associated with a putative physiological role of leptin in the regulation of CB function. Since, the CBs are implicated in energy metabolism, here we tested the effects of different concentrations of leptin administration on ventilatory parameters and on carotid sinus nerve (CSN) activity in control and high‐fat (HF) diet fed rats, in order to clarify the role of leptin in ventilation control in metabolic disease states. We also investigated the expression of leptin receptors and the neurotransmitters involved in leptin signalling in the CBs. We found that in non‐disease conditions, leptin increases minute ventilation in both basal and hypoxic conditions. However, in the HF model, the effect of leptin in ventilatory control is blunted. We also observed that HF rats display an increased frequency of CSN discharge in basal conditions that is not altered by leptin, in contrast to what is observed in control animals. Leptin did not modify intracellular Ca2+ in CB chemoreceptor cells, but it produced an increase in the release of adenosine from the whole CB. We conclude that CBs represent an important target for leptin signalling, not only to coordinate peripheral ventilatory chemoreflexive drive, but probably also to modulate metabolic variables. We also concluded that leptin signalling is mediated by adenosine release and that HF diets blunt leptin responses in the CB, compromising ventilatory adaptation.
Publisher version (URL)https://doi.org/10.1113/JP275362
URIhttp://hdl.handle.net/10261/196657
DOI10.1113/JP275362
ISSN0022-3751
E-ISSN1469-7793
Appears in Collections:(IBGM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf59,24 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.