Role of endothelium-derived nitric oxide in the regulation of tonus in large-bore arterial resistance vessels, arterioles and veins in cat skeletal muscle
(1990) In Acta Physiologica Scandinavica 140(3). p.301-309- Abstract
- The role of endothelium-derived nitric oxide in the regulation of vascular resistance (tonus) in cat skeletal muscle was studied with the use of NG-monomethyl-L-arginine (L-NMMA), a specific inhibitor of nitric oxide formation from L-arginine. The study was performed with a whole-organ technique which permits simultaneous, continuous and quantitative recordings of resistance reactions in the whole vascular bed (RT) and in its three consecutive sections: large-bore arterial resistance vessels (greater than 25 microns; Ra,prox), small arterioles (less than 25 microns; Ra,micro) and veins (Rv). NG-monomethyl-L-arginine (3-100 mg kg-1 tissue, i.a.) induced a dose-dependent increase in resistance that was preferentially, but not selectively,... (More)
- The role of endothelium-derived nitric oxide in the regulation of vascular resistance (tonus) in cat skeletal muscle was studied with the use of NG-monomethyl-L-arginine (L-NMMA), a specific inhibitor of nitric oxide formation from L-arginine. The study was performed with a whole-organ technique which permits simultaneous, continuous and quantitative recordings of resistance reactions in the whole vascular bed (RT) and in its three consecutive sections: large-bore arterial resistance vessels (greater than 25 microns; Ra,prox), small arterioles (less than 25 microns; Ra,micro) and veins (Rv). NG-monomethyl-L-arginine (3-100 mg kg-1 tissue, i.a.) induced a dose-dependent increase in resistance that was preferentially, but not selectively, confined to the large-bore arterial resistance vessels. At a maximally effective dose (100 mg kg-1), the nitric oxide inhibitor caused a marked constriction, within 5 min, on average increasing RT by 99%, Ra,prox by 138%, Ra,micro by 18% and Rv by 23%. The constrictor response to NG-monomethyl-L-arginine was long-lasting but disappeared gradually over a period of about 1 h. However, it could be abruptly abolished by excess L-arginine (300 mg kg-1, i.a.). The vasodilator response (RT) to acetylcholine was significantly attenuated in the presence of NG-monomethyl-L-arginine compared with the control response. The results suggested that nitric oxide formation from L-arginine by the vascular endothelium plays a fundamental role in the regulation of vascular resistance (tone) in vivo, with its main site of action located in the large-bore arterial resistance vessels. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1105109
- author
- Ekelund, Ulf
LU
and Mellander, Stefan LU
- organization
- publishing date
- 1990
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Physiologica Scandinavica
- volume
- 140
- issue
- 3
- pages
- 301 - 309
- publisher
- Wiley-Blackwell
- external identifiers
-
- pmid:2082699
- scopus:0025053288
- ISSN
- 0001-6772
- language
- English
- LU publication?
- yes
- id
- 2e15d401-0837-46bc-bae0-dbfa9b768039 (old id 1105109)
- date added to LUP
- 2016-04-01 15:52:59
- date last changed
- 2021-08-29 04:51:13
@article{2e15d401-0837-46bc-bae0-dbfa9b768039, abstract = {{The role of endothelium-derived nitric oxide in the regulation of vascular resistance (tonus) in cat skeletal muscle was studied with the use of NG-monomethyl-L-arginine (L-NMMA), a specific inhibitor of nitric oxide formation from L-arginine. The study was performed with a whole-organ technique which permits simultaneous, continuous and quantitative recordings of resistance reactions in the whole vascular bed (RT) and in its three consecutive sections: large-bore arterial resistance vessels (greater than 25 microns; Ra,prox), small arterioles (less than 25 microns; Ra,micro) and veins (Rv). NG-monomethyl-L-arginine (3-100 mg kg-1 tissue, i.a.) induced a dose-dependent increase in resistance that was preferentially, but not selectively, confined to the large-bore arterial resistance vessels. At a maximally effective dose (100 mg kg-1), the nitric oxide inhibitor caused a marked constriction, within 5 min, on average increasing RT by 99%, Ra,prox by 138%, Ra,micro by 18% and Rv by 23%. The constrictor response to NG-monomethyl-L-arginine was long-lasting but disappeared gradually over a period of about 1 h. However, it could be abruptly abolished by excess L-arginine (300 mg kg-1, i.a.). The vasodilator response (RT) to acetylcholine was significantly attenuated in the presence of NG-monomethyl-L-arginine compared with the control response. The results suggested that nitric oxide formation from L-arginine by the vascular endothelium plays a fundamental role in the regulation of vascular resistance (tone) in vivo, with its main site of action located in the large-bore arterial resistance vessels.}}, author = {{Ekelund, Ulf and Mellander, Stefan}}, issn = {{0001-6772}}, language = {{eng}}, number = {{3}}, pages = {{301--309}}, publisher = {{Wiley-Blackwell}}, series = {{Acta Physiologica Scandinavica}}, title = {{Role of endothelium-derived nitric oxide in the regulation of tonus in large-bore arterial resistance vessels, arterioles and veins in cat skeletal muscle}}, volume = {{140}}, year = {{1990}}, }