alexa Pacemaker currents in mouse locus coeruleus neurons.
Neurology

Neurology

Journal of Multiple Sclerosis

Author(s): de Oliveira RB, Howlett MC, Gravina FS, Imtiaz MS, Callister RJ, , de Oliveira RB, Howlett MC, Gravina FS, Imtiaz MS, Callister RJ,

Abstract Share this page

Abstract We have characterized the currents that flow during the interspike interval in mouse locus coeruleus (LC) neurons, by application of depolarizing ramps and pulses, and compared our results with information available for rats. A tetrodotoxin (TTX)-sensitive current was the only inward conductance active during the interspike interval; no TTX-insensitive Na(+) or oscillatory currents were detected. Ca(2+)-free and Ba(2+)-containing solutions failed to demonstrate a Ca(2+) current during the interspike interval, although a Ca(2+) current was activated at membrane potentials positive to -40 mV. A high- tetraethylammonium chloride (TEA) (15 mM) sensitive current accounted for almost all the K(+) conductance during the interspike interval. Ca(2+)-activated K(+), inward rectifier and low-TEA (10 muM) sensitive currents were not detected within the interspike interval. Comparison of these findings to those reported for neonatal rat LC neurons indicates that the pacemaker currents are similar, but not identical, in the two species with mice lacking a persistent Ca(2+) current during the interspike interval. The net pacemaking current determined by differentiating the interspike interval from averaged action potential recordings closely matched the net ramp-induced currents obtained either under voltage clamp or after reconstructing this current from pharmacologically isolated currents. In summary, our results suggest the interspike interval pacemaker mechanism in mouse LC neurons involves a combination of a TTX-sensitive Na(+) current and a high TEA-sensitive K(+) current. In contrast with rats, a persistent Ca(2+) current is not involved. Copyright 2010 IBRO. Published by Elsevier Ltd. All rights reserved. This article was published in Neuroscience and referenced in Journal of Multiple Sclerosis

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

[email protected]

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

[email protected]

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001 Extn: 9042

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords