Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 7267-7307 |
| Number of pages | 41 |
| Journal | Journal of Physiology |
| Volume | 594 |
| Issue number | 24 |
| Early online date | 12 Oct 2016 |
| DOIs | |
| Publication status | Published - 14 Dec 2016 |
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Keywords
- endothelium
- calcium
- flow-mediated dilation
- acetylcholine
- endothelial calcium signalling
- autocrine signalling molecules
- endothelial mechanotransduction
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Acetylcholine released by endothelial cells facilitates flow-mediated dilatation. / Wilson, Calum; Lee, Matthew D.; McCarron, John G.
In: Journal of Physiology, Vol. 594, No. 24, 14.12.2016, p. 7267-7307.Research output: Contribution to journal › Article
TY - JOUR
T1 - Acetylcholine released by endothelial cells facilitates flow-mediated dilatation
AU - Wilson, Calum
AU - Lee, Matthew D.
AU - McCarron, John G.
PY - 2016/12/14
Y1 - 2016/12/14
N2 - Circulating blood generates frictional forces (shear-stress) on the walls of blood vessels. These frictional forces critically regulate vascular function. The endothelium senses these frictional forces and, in response, releases various vasodilators that relax smooth muscle cells in a process termed flow-mediated dilatation. Whilst some elements of the signalling mechanisms have been identified, precisely how flow is sensed and transduced to cause the release of relaxing factors is poorly understood. By imaging signalling in large areas of the endothelium of intact arteries, we show that the endothelium responds to flow by releasing acetylcholine. Once liberated, acetylcholine acts to trigger calcium release from the internal store in endothelial cells, nitric oxide production and artery relaxation. Flow-activated release of acetylcholine from the endothelium is non-vesicular and occurs via organic cation transporters. Acetylcholine is generated following mitochondrial production of acetylCoA. Thus, we show acetylcholine is an autocrine signalling molecule released from endothelial cells, and identify a new role for the classical neurotransmitter in endothelial mechanotransduction.
AB - Circulating blood generates frictional forces (shear-stress) on the walls of blood vessels. These frictional forces critically regulate vascular function. The endothelium senses these frictional forces and, in response, releases various vasodilators that relax smooth muscle cells in a process termed flow-mediated dilatation. Whilst some elements of the signalling mechanisms have been identified, precisely how flow is sensed and transduced to cause the release of relaxing factors is poorly understood. By imaging signalling in large areas of the endothelium of intact arteries, we show that the endothelium responds to flow by releasing acetylcholine. Once liberated, acetylcholine acts to trigger calcium release from the internal store in endothelial cells, nitric oxide production and artery relaxation. Flow-activated release of acetylcholine from the endothelium is non-vesicular and occurs via organic cation transporters. Acetylcholine is generated following mitochondrial production of acetylCoA. Thus, we show acetylcholine is an autocrine signalling molecule released from endothelial cells, and identify a new role for the classical neurotransmitter in endothelial mechanotransduction.
KW - endothelium
KW - calcium
KW - flow-mediated dilation
KW - acetylcholine
KW - endothelial calcium signalling
KW - autocrine signalling molecules
KW - endothelial mechanotransduction
UR - http://physoc.onlinelibrary.wiley.com/hub/journal/10.1111/(ISSN)1469-7793/
U2 - 10.1113/JP272927
DO - 10.1113/JP272927
M3 - Article
VL - 594
SP - 7267
EP - 7307
JO - Journal of Physiology
JF - Journal of Physiology
SN - 0022-3751
IS - 24
ER -