The University of Southampton
University of Southampton Institutional Repository

Effects of leukotrienes C4 and D4 on human isolates saphenous veins

Effects of leukotrienes C4 and D4 on human isolates saphenous veins
Effects of leukotrienes C4 and D4 on human isolates saphenous veins

Vascular injury during the intra-operative procedures of bypass surgery may be the initiating event in the gradual deterioration in the patency of the graft. Adhesion of leukocytes to the vascular endothelium frequently accompanies preparation and insertion of the graft. However, little is known about the effects of vasoactive substances released from leukocytes on vein graft performance. To determine whether leukotrienes are capable of affecting the tone of blood vessels used as coronary artery bypass grafts we studied the human saphenous vein as intact rings using an isolated organ bath technique. LTC4 and LTD4 caused weak endothelium-dependent relaxations at lower concentrations (1 pM to 1 nM) and powerful endothelium-independent contractions at higher concentrations (3 nM to 0.1 μM). The maximum responses to LTC4 and LTD4 for relaxations were 21.1 ± 4.8% and 28.6 ± 3.4% (% of noradrenaline induced tone) respectively and 64.6 ± 9.9% and 59.1 ± 7.9% (% response to KCl) respectively for contractions. The inhibitor of nitric oxide formation, L-N(G)-monomethyl L-arginine, prevented the relaxations to LTD4, but not LTC4 and unmasked endothelium-dependent contractions to LTD4 (32.9 ± 11.3%). N(G)-monomethyl L-arginine had no effect on the contractions produced by LTC4 or LTD4. Indomethacin augmented relaxations and contractions of saphenous vein to LTC4 from 22.5 ± 5.6 to 40.02 ± 8.7 (P < 0.05) and 48.8 ± 5.5% to 74.7 ± 7.6% (P < 0.01) respectively. LTD4 responses were not affected by indomethacin treatment. In conclusion, leukotrienes mediate biphasic responses in the human saphenous vein. The pronounced constriction of saphenous veins with LTC4 and LTD4 suggest that leukotrienes derived from leukocytes and/or the vessel wall may modulate flow in the saphenous vein and possibly influence early and/or long term vein graft patency.

bypass-graft, endothelium, leukotrienes, vascular reactivity
0306-5251
409-414
Allen, Sean P.
74094089-9076-4580-b4c3-385bec77b294
Chester, Adrian H.
8ff4f930-1f6e-4fa1-9014-0c0f60565289
Piper, Priscilla J.
7d88e87e-c5a4-4dcb-b561-89340bd49778
Sampson, Anthony P.
4ca76f6f-ff35-425d-a7e7-c2bd2ea2df60
Akl, El Sayed K.
6b72c8ac-1b0e-45be-bb0d-a948007ac467
Yacoub, Madgi H.
834a5d93-f7a4-4efc-9bd0-41901f8b38e9
Allen, Sean P.
74094089-9076-4580-b4c3-385bec77b294
Chester, Adrian H.
8ff4f930-1f6e-4fa1-9014-0c0f60565289
Piper, Priscilla J.
7d88e87e-c5a4-4dcb-b561-89340bd49778
Sampson, Anthony P.
4ca76f6f-ff35-425d-a7e7-c2bd2ea2df60
Akl, El Sayed K.
6b72c8ac-1b0e-45be-bb0d-a948007ac467
Yacoub, Madgi H.
834a5d93-f7a4-4efc-9bd0-41901f8b38e9

Allen, Sean P., Chester, Adrian H., Piper, Priscilla J., Sampson, Anthony P., Akl, El Sayed K. and Yacoub, Madgi H. (1992) Effects of leukotrienes C4 and D4 on human isolates saphenous veins. British Journal of Clinical Pharmacology, 34 (5), 409-414.

Record type: Article

Abstract

Vascular injury during the intra-operative procedures of bypass surgery may be the initiating event in the gradual deterioration in the patency of the graft. Adhesion of leukocytes to the vascular endothelium frequently accompanies preparation and insertion of the graft. However, little is known about the effects of vasoactive substances released from leukocytes on vein graft performance. To determine whether leukotrienes are capable of affecting the tone of blood vessels used as coronary artery bypass grafts we studied the human saphenous vein as intact rings using an isolated organ bath technique. LTC4 and LTD4 caused weak endothelium-dependent relaxations at lower concentrations (1 pM to 1 nM) and powerful endothelium-independent contractions at higher concentrations (3 nM to 0.1 μM). The maximum responses to LTC4 and LTD4 for relaxations were 21.1 ± 4.8% and 28.6 ± 3.4% (% of noradrenaline induced tone) respectively and 64.6 ± 9.9% and 59.1 ± 7.9% (% response to KCl) respectively for contractions. The inhibitor of nitric oxide formation, L-N(G)-monomethyl L-arginine, prevented the relaxations to LTD4, but not LTC4 and unmasked endothelium-dependent contractions to LTD4 (32.9 ± 11.3%). N(G)-monomethyl L-arginine had no effect on the contractions produced by LTC4 or LTD4. Indomethacin augmented relaxations and contractions of saphenous vein to LTC4 from 22.5 ± 5.6 to 40.02 ± 8.7 (P < 0.05) and 48.8 ± 5.5% to 74.7 ± 7.6% (P < 0.01) respectively. LTD4 responses were not affected by indomethacin treatment. In conclusion, leukotrienes mediate biphasic responses in the human saphenous vein. The pronounced constriction of saphenous veins with LTC4 and LTD4 suggest that leukotrienes derived from leukocytes and/or the vessel wall may modulate flow in the saphenous vein and possibly influence early and/or long term vein graft patency.

This record has no associated files available for download.

More information

Published date: November 1992
Keywords: bypass-graft, endothelium, leukotrienes, vascular reactivity

Identifiers

Local EPrints ID: 455257
URI: http://eprints.soton.ac.uk/id/eprint/455257
ISSN: 0306-5251
PURE UUID: 549a3d61-7c9f-4739-9f71-aad39087d1a8
ORCID for Anthony P. Sampson: ORCID iD orcid.org/0009-0008-9653-8935

Catalogue record

Date deposited: 15 Mar 2022 18:09
Last modified: 17 Mar 2024 02:43

Export record

Contributors

Author: Sean P. Allen
Author: Adrian H. Chester
Author: Priscilla J. Piper
Author: El Sayed K. Akl
Author: Madgi H. Yacoub

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×