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Dilatory responses ...
Dilatory responses to estrogenic compounds in small femoral arteries of male and female estrogen receptor-beta knockout mice
- Artikel/kapitelEngelska2006
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American Physiological Society,2006
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LIBRIS-ID:oai:prod.swepub.kib.ki.se:1938235
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http://kipublications.ki.se/Default.aspx?queryparsed=id:1938235URI
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https://doi.org/10.1152/ajpheart.00815.2005DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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The objectives of this study were to determine whether acute dilatory responses to estrogen receptor agonists are altered in isolated arteries from estrogen receptor β-deficient mice (β-ERKO) and to gain insight into the role of nitric oxide (NO) in these responses. Femoral arteries (∼250 μm) from male and female β-ERKO mice and wild-type (WT) littermates (26 female, 13 in each group; and 24 male, 12 in each group) were mounted on a Multi-Myograph. Concentration-response curves to 17β-estradiol (17β-E2) and the selective estrogen receptor-α (ER-α) agonist propyl-[1H]-pyrazole-1,3,5-triy-trisphenol (PPT) were obtained before and after NO synthase (NOS) inhibition [ Nω-nitro-l-arginine methyl ester (l-NAME), 0.1 mM] in arteries preconstricted with U-46619 (a thromboxane analog). In WT mice, responses to the potent estrogen receptor-β (ER-β) agonist 2,3-bis(4-hydroxyphenyl)-propionitrile (DPN) and the contribution of NO were also assessed. Concentration-response curves to 17β-E2and PPT were similar in arteries from WT and β-ERKO mice of both genders, but NO-mediated relaxation was different, since l-NAME reduced 17β-E2mediated relaxation in arteries from male and female β-ERKO but not WT mice ( P < 0.05). NOS inhibition reduced dilation to PPT in arteries from male and female WT mice, as well as arteries from female β-ERKO mice ( P < 0.05). Responses to DPN in arteries from WT female and male mice did not differ after NOS inhibition. The acute dilatory responses to estrogenic compounds are similar in WT and β-ERKO mice but differ mechanistically. Because NO appeared to contribute to responses to 17β-E2in arteries from β-ERKO but not WT mice, the presence of ER-β apparently inhibits ER-α-mediated NO relaxation.
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Douglas, G
(författare)
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Gustafsson, JAK
(författare)
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Poston, L
(författare)
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Kublickiene, KKarolinska Institutet
(författare)
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Karolinska Institutet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:American journal of physiology. Heart and circulatory physiology: American Physiological Society290:2, s. H823-H8290363-61351522-1539
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