Search results for "6-dimethyl-5"
showing 10 items of 14 documents
Mode and mechanism of neurotensin action in rat proximal colon
1997
Abstract This study examined the mechanism of action of neurotensin on intraluminal pressure in rat proximal colon. The direct and indirect contractile response to neurotensin (100 nM) was abolished in Ca 2+ -free solution, and was antagonized by nifedipine (1–5–10 nM) and potentiated by Bay K 8644 (methyl 1,4-dihydro-2,6-dimethyl-3-nitro-4-(2-trifluoromethylphenyl)-pyridine-5-carboxylate) (10–100–1000 nM). Neurotensin, in the presence of nifedipine (10 nM) and atropine (1 μM), induced a tetrodotoxin-insensitive inhibitory effect, which was antagonized by SR 48692 (2[(1-(7-chloro-4-quinolinyl)-5-(2,6-dimethoxy-phenyl)pyrazol-3-yl) carbonyl amino]tricyclo (3.3.1.1. 3.7 ) decan-2-carboxylic a…
L-type calcium channel activity in human atrial myocytes as influenced by 5-HT.
1993
5-Hydroxytryptamine (10 mumol/l; 5-HT) exerted a positive inotropic effect associated with an increase in the Ca2+ current (ICa) in the human right atrium. For detailed analysis, L-type Ca2+ channel currents were recorded from cell-attached patches using 100 mmol/l Ba2+ as charge carrier. Ca2+ channel activity was identified, first, by burst-like inwardly directed currents and, second, by the appearance of long channel openings promoted by Bay K 8644 (1 mumol/l) upon repetitive depolarizations from -80 to 0 mV. The unitary conductance of the Ca2+ channel amounted to 25.8 pS. During superfusion with 5-HT, ensemble averaged (mean) current was enhanced by about 60%. The increase in mean curren…
Role of K+ and Ca2+ fluxes in the cerebroarterial vasoactive effects of sildenafil
2007
The aim of this study was to assess the role of K(+) and Ca(2+) fluxes in the cerebroarterial vasoactive effects of the phosphodiesterase-5 inhibitor sildenafil. We used isolated rabbit basilar arteries to assess the effects of extracellular K(+) raising on sildenafil-induced vasodilatation, and studied the pharmacological interaction of sildenafil with selective modulators of membrane K(+) and Ca(2+) channels. Expression of Kv1 subunits of K(+) channels was assessed at messenger and protein levels. Parallel experiments were carried out with zaprinast for comparison. Sildenafil (10 nM-0.1 mM) induced concentration-dependent relaxation of endothelin-1 (10 nM)-precontracted arteries, which wa…
Calcium dependence of the contraction produced by endothelin (ET-1) in isolated guinea-pig trachea.
1990
Endothelin (ET-1, 1 pM to 0.1 microM) produced a concentration-dependent contraction of isolated guinea-pig trachea. BAY K 8644 (1 microM) did not significantly alter the concentration-response curve for ET-1. Incubation with nicardipine (10 microM) partly inhibited responses to low concentrations (10 pM to 1 nM) of ET-1 while verapamil (10 microM) and diltiazem (10 microM) were ineffective. La3+ (10 microM) and Cd2+ (10 microM) preferentially depressed the responses evoked by high concentrations (30 nM-0.1 microM) of ET-1 without affecting the responses evoked by low concentrations of the peptide. Incubation in Ca2(+)-free (with EDTA, 1 mM) medium resulted in suppression of the responses e…
CCDC 200198: Experimental Crystal Structure Determination
2004
Related Article: D.Pomeranc, D.Jouvenot, J.-C.Chambron, J.-P.Collin, V.Heitz, J.-P.Sauvage|2003|Chem.-Eur.J.|9|4247|doi:10.1002/chem.200304716
CCDC 2080690: Experimental Crystal Structure Determination
2021
Related Article: Jingyu Zhang, Wei Xia, Meilin Qu, Saskia Huda, Jas S. Ward, Kari Rissanen, Markus Albrecht|2021|Eur.J.Org.Chem.|2021|6097|doi:10.1002/ejoc.202101191
CCDC 189634: Experimental Crystal Structure Determination
2004
Related Article: D.Pomeranc, D.Jouvenot, J.-C.Chambron, J.-P.Collin, V.Heitz, J.-P.Sauvage|2003|Chem.-Eur.J.|9|4247|doi:10.1002/chem.200304716
CCDC 983736: Experimental Crystal Structure Determination
2014
Related Article: Flavia Pop, Magali Allain, Pascale Auban-Senzier, José Martínez-Lillo, Francesc Lloret, Miguel Julve, Enric Canadell, Narcis Avarvari|2014|Eur.J.Inorg.Chem.||3855|doi:10.1002/ejic.201400125
CCDC 1554541: Experimental Crystal Structure Determination
2018
Related Article: Hongyi Suo, Youfu Zhang, Zhifeng Ma, Wenhong Yang, Zygmunt Flisak, Xiang Hao, Xinquan Hu, Wen-Hua Sun|2017|Catalysis Communications|102|26|doi:10.1016/j.catcom.2017.08.021
CCDC 1054235: Experimental Crystal Structure Determination
2015
Related Article: Junjun Ba, Shizhen Du, Erlin Yue, Xinquan Hu, Zygmunt Flisak, Wen-Hua Sun|2015|RSC Advances|5|32720|doi:10.1039/C5RA04722F