Chapter title |
Adenosine Receptor Blockade by Caffeine Inhibits Carotid Sinus Nerve Chemosensory Activity in Chronic Intermittent Hypoxic Animals.
|
---|---|
Chapter number | 15 |
Book title |
Arterial Chemoreceptors in Physiology and Pathophysiology
|
Published in |
Advances in experimental medicine and biology, January 2015
|
DOI | 10.1007/978-3-319-18440-1_15 |
Pubmed ID | |
Book ISBNs |
978-3-31-918439-5, 978-3-31-918440-1
|
Authors |
Sacramento, J F, Gonzalez, C, Gonzalez-Martin, M C, Conde, S V, J. F. Sacramento, C. Gonzalez, M. C. Gonzalez-Martin, S. V. Conde |
Abstract |
Adenosine is a key excitatory neurotransmitter at the synapse between O2-sensing chemoreceptor cells-carotid sinus nerve (CSN) endings in the carotid body (CB). Herein, we have investigated the significance of adenosine, through the blockade of its receptors with caffeine, on the CB hypoxic sensitization induced by chronic intermittent hypoxia (CIH) in the rat. CIH animals were obtained by submitting rats during 15 days from 8:00 to 16:00 to 10 %O2 for 40 s and 20 % O2 for 80 s (i.e., 30 episodes/h). Caffeine (1 mM) was tested in spontaneous and 5 %O2 evoked-CSN chemosensory activity in normoxic and CIH animals. CIH decreased basal spontaneous activity but increased significantly CSN activity evoked by acute hypoxia. Caffeine did not modify basal spontaneous activity in normoxic rats, but decreased significantly by 47.83 % basal activity in CIH animals. In addition, acute application of caffeine decreased 49.31 % and 56.01 % the acute hypoxic response in normoxic and CIH animals, respectively. We demonstrate that adenosine contributes to fix CSN basal activity during CIH, being also involved in hypoxic CB chemotransduction. It is concluded that adenosine participates in CB sensitization during CIH. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 2 | 100% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 2 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Portugal | 1 | 5% |
Unknown | 18 | 95% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 4 | 21% |
Professor > Associate Professor | 3 | 16% |
Other | 2 | 11% |
Student > Master | 2 | 11% |
Professor | 1 | 5% |
Other | 2 | 11% |
Unknown | 5 | 26% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 10 | 53% |
Pharmacology, Toxicology and Pharmaceutical Science | 2 | 11% |
Unspecified | 1 | 5% |
Social Sciences | 1 | 5% |
Biochemistry, Genetics and Molecular Biology | 1 | 5% |
Other | 0 | 0% |
Unknown | 4 | 21% |