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Dependency of endothelial cell function on vascular smooth muscle cells in guinea-pig mesenteric arteries and arterioles.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yamamoto, Yoshimichi Suzuki, Hikaru |
| Copyright Year | 2005 |
| Abstract | Using guinea-pig mesenteric arteries and arterioles, we investigated the membrane potential of endothelial cells at rest and during application of acetylcholine (ACh) with and without the smooth muscle layers attached. When smooth muscle and endothelial layers were in close apposition, the resting membrane potentials of the two types of cells were closely related and were slightly more negative in the smooth muscle cells than in the endothelial cells. Once the endothelial layer was separated from the smooth muscle layer, the endothelial cells depolarized (the average, -4.2 mV). In the isolated endothelial layer, ACh did not induce a membrane hyperpolarization as expected, but did induce a quick depolarization soon after conventional whole-cell recording was started. However, as the pipette solution (high K+) gradually diffused into the endothelial layer, the membrane response to ACh gradually changed toward hyperpolarization. ACh-induced hyperpolarization was also observed after incubating preparations in a high-potassium bath solution. Our results indicate that vascular smooth muscle cells and endothelial cells are influencing each other as a functional unit and that the endothelial cells rely on the smooth muscle cells for their intracellular ionic composition and resting membrane potential. |
| Starting Page | 77 |
| Ending Page | 85 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/jsmr/41/2/41_2_77/_pdf/-char/en |
| PubMed reference number | 15988151v1 |
| Volume Number | 41 |
| Issue Number | 2 |
| Journal | Journal of smooth muscle research = Nihon Heikatsukin Gakkai kikanshi |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Acetylcholine Cell physiology Diffusion Endothelial Cells Endothelium Membrane Potentials Mesenteric Arteries Mesentery Muscle Cells Muscle layer Muscle, Smooth, Vascular Myocytes, Smooth Muscle Potassium Rest Resting Potentials Smooth muscle (tissue) Structure of arteriole Tissue membrane anatomical layer incubated membrane hyperpolarization |
| Content Type | Text |
| Resource Type | Article |
