Vasomoter responses are conducted along arterioles and feed arteries through cell-to-cell coupling as enabled by gap junctions. The properties of the conduction differ between vascular beds that supply tissues that differ in structure, function, and sympathetic innervation.
The Specific Aim of this study is to examine conducted vasomoter responses as related to connexin isoform expression in endothelial and smooth muscle cells of resistance microvessels (arterioles and feed arteries) that are innervated by sympathetic nerves (hamster retractor muscle) relative to microvessels that are not (hamster cheek pouch epithelium). Complementary experiments will determine how these parameters are effected by acute alterations in sympathetic neurotransmission. The long- term goal is to understand how the sympathetic nervous system influences the molecular determinants of conduction in microvessels that control oxygen transport to tissues. Understanding of such regulation of connexin expression and function will aid in the treatment of diseases involving gap junction dysfunction.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32HL067626-02
Application #
6538039
Study Section
Cardiovascular and Pulmonary Research A Study Section (CVA)
Program Officer
Schucker, Beth
Project Start
2002-04-01
Project End
Budget Start
2002-04-01
Budget End
2003-03-31
Support Year
2
Fiscal Year
2002
Total Cost
$38,320
Indirect Cost
Name
John B. Pierce Laboratory, Inc.
Department
Type
DUNS #
City
New Haven
State
CT
Country
United States
Zip Code
06519
Looft-Wilson, Robin C; Payne, Geoffrey W; Segal, Steven S (2004) Connexin expression and conducted vasodilation along arteriolar endothelium in mouse skeletal muscle. J Appl Physiol 97:1152-8
Looft-Wilson, Robin C; Haug, Sara J; Neufer, P Darrell et al. (2004) Independence of connexin expression and vasomotor conduction from sympathetic innervation in hamster feed arteries. Microcirculation 11:397-408
Sandow, Shaun L; Looft-Wilson, Robin; Doran, Beth et al. (2003) Expression of homocellular and heterocellular gap junctions in hamster arterioles and feed arteries. Cardiovasc Res 60:643-53