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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Interaction between thromboxane A2 and 5-hydroxytryptamine in the radial artery compared to the internal thoracic artery.

The aim of the present study was to investigate if the function of 5-hydroxytryptamine-1B/1D (5-HT1B/1D) receptors in human radial artery (RA) and internal thoracic artery (ITA) can be modified by thromboxane A2 (TXA2) released from the vessel wall in these two arteries that are commonly used in coronary artery bypass grafts. The 5-HT1B/1D agonist sumatriptan contracted the RA with a maximum response of 23.5+/-6.8 mN and a pD2 value of 6.6+/-0. 1. The effect of sumatriptan was significantly reduced in the ITA with a maximum of 5.8+/-2.7 mN (P<.05) and a pD2 value of 6.4+/-0. 2. The TXA2 receptor antagonist SQ30741 inhibited contractions to sumatriptan in the RA but not in the ITA. It is concluded that the effect mediated by 5-HT1B/1D is augmented by endogenous TXA2 in the RA.[1]

References

  1. Interaction between thromboxane A2 and 5-hydroxytryptamine in the radial artery compared to the internal thoracic artery. Chester, A.H., Amrani, M., Sproson, C.A., Yacoub, M.H. Gen. Pharmacol. (2000) [Pubmed]
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