Abstract：
:1. The present study compared the binding and functional characteristics of tachykinin NK2 receptors in human detrusor muscle with those in human colon circular muscle. 2. In radioligand binding studies, similar KD values were observed for tachykinin NK2 receptor radioligands [125I]-neurokinin (NK) A, [125I]-[Lys5,Tyr(I2)7,MeLeu9,Nle10,]NKA(4-10) and [3H]-SR48968 in both human colon circular muscle (0.28-1.1 nmol/L) and human bladder detrusor (0.49-0.91 nmol/L), suggesting binding was primarily to tachykinin NK2 receptors. Receptor capacity (Bmax) was greater in colon compared with detrusor muscle. 3. In functional studies of isolated smooth muscle contraction, there was an excellent positive correlation between human bladder detrusor and colon circular muscle with respect to in vitro contractile potency (r = 0.97) and maximum responses (r = 0.98) to tachykinins, selective tachykinin receptor ligands and l-Ala-substituted NKA(4-10) analogues. 4. Species differences between the human and rat tachykinin NK2 receptors were apparent as observed by a low correlation for potency (r = 0.77) and efficacy (r = 0.32) of l-Ala-substituted analogues in isolated smooth muscle contractile studies. 5. Minor differences observed in the affinity and potency of NK2 receptor agonists between colon and bladder are dependent on the tissue of interest, the receptor-effector coupling and the presence of other tachykinin receptors. Overall, the NK2 receptors of human colon and urinary bladder smooth muscle appear pharmacologically identical.
journal_name
Clin Exp Pharmacol Physioljournal_title
Clinical and experimental pharmacology & physiologyauthors
Warner FJ,Miller RC,Burcher Edoi
10.1046/j.1440-1681.2003.03887.xkeywords:
subject
Has Abstractpub_date
2003-09-01 00:00:00pages
632-9issue
9eissn
0305-1870issn
1440-1681pii
3887journal_volume
30pub_type
杂志文章abstract：:1. Visfatin (also known as nicotinamide phosphoribosyltransferase or Nampt) is a novel adipokine associated with metabolic abnormalities in obesity and diabetes. The aim of the present study was to determine whether visfatin levels in the circulation and visfatin expression in fat tissues are altered in Lyon hypertens...
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pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：1981-09-01 00:00:00
