Next Article in Journal
Identification of Potential Inhibitors from Pyriproxyfen with Insecticidal Activity by Virtual Screening
Next Article in Special Issue
Modulators of Transient Receptor Potential (TRP) Channels as Therapeutic Options in Lung Disease
Previous Article in Journal
[177Lu]Lu-PSMA-617 Salivary Gland Uptake Characterized by Quantitative In Vitro Autoradiography
Previous Article in Special Issue
TRPM8 Channels and Dry Eye
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle
Pharmaceuticals 2019, 12(1), 19; https://doi.org/10.3390/ph12010019

TRPV1 Inhibits the Ventilatory Response to Hypoxia in Adult Rats, but Not the CO2-Drive to Breathe

1
Department of Animal Morphology and Physiology, Faculty of Agricultural and Veterinarian Sciences, UNESP at Jaboticabal, Rod. Prof. Paulo Donato Castellane s/n, Jaboticabal SP 14870-000, Brazil
2
Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo 05508-090, Brazil
3
Thermoregulation and Systemic Inflammation Laboratory (FeverLab), Trauma Research, St. Joseph’s Hospital and Medical Center, Phoenix, AZ 85013, USA
*
Author to whom correspondence should be addressed.
Received: 25 October 2018 / Revised: 27 November 2018 / Accepted: 7 December 2018 / Published: 24 January 2019
Full-Text   |   PDF [2006 KB, uploaded 24 January 2019]   |  

Abstract

Receptors of the transient receptor potential (TRP) channels superfamily are expressed in many tissues and have different physiological functions. However, there are few studies investigating the role of these channels in cardiorespiratory control in mammals. We assessed the role of central and peripheral TRPV1 receptors in the cardiorespiratory responses to hypoxia (10% O2) and hypercapnia (7% CO2) by measuring pulmonary ventilation ( V ˙ E ), heart rate (HR), mean arterial pressure (MAP) and body temperature (Tb) of male Wistar rats before and after intraperitoneal (AMG9810 [2.85 µg/kg, 1 mL/kg]) or intracebroventricular (AMG9810 [2.85 µg/kg, 1 µL] or AMG7905 [28.5 μg/kg, 1 µL]) injections of TRPV1 antagonists. Central or peripheral injection of TRPV1 antagonists did not change cardiorespiratory parameters or Tb during room air and hypercapnic conditions. However, the hypoxic ventilatory response was exaggerated by both central and peripheral injection of AMG9810. In addition, the peripheral antagonist blunted the drop in Tb induced by hypoxia. Therefore, the current data provide evidence that TRPV1 channels exert an inhibitory modulation on the hypoxic drive to breathe and stimulate the Tb reduction during hypoxia. View Full-Text
Keywords: ventilation; hypercapnia; channels; chemosensitivity; hypothermia; blood pressure ventilation; hypercapnia; channels; chemosensitivity; hypothermia; blood pressure
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Patrone, L.G.A.; Duarte, J.B.; Bícego, K.C.; Steiner, A.A.; Romanovsky, A.A.; Gargaglioni, L.H. TRPV1 Inhibits the Ventilatory Response to Hypoxia in Adult Rats, but Not the CO2-Drive to Breathe. Pharmaceuticals 2019, 12, 19.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Pharmaceuticals EISSN 1424-8247 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top