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1. Gasser R;
Esche G;
Gasser S;
Holzmann S;
Köppel H;
Moosbrugger B;
Salzer M
Indiscriminative Effects of Repaglinide and Other Specific Modulators of Transmembrane KATP-Channel Gating Properties upon Ischaemic/Hypoxic Bovine Coronary Artery Smooth Muscle Relaxation
Koronararterien - Relaxation
Journal of Clinical and Basic Cardiology 2003; 6 (1-4): 81-85
A: Iodoacetic acid (IAA), an inhibitor of the glycolytic enzyme G3P-dehydrogenase leads to vasodilation; inhibition by glibenclamide,
repaglinide and glimepiride (B) is insignificant; only a dose of 1 µM repaglinide is able to inhibit IAA-induced vasorelaxation after 10 min by 20 %. Keywords: coronary artery,
diagram,
Diagramm,
Glibenclamid,
glibenclamide,
Glimepirid,
glimepiride,
Koronararterie,
Relaxation,
Relaxation,
Repaglinid,
Repaglinide
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2. Gasser R;
Esche G;
Gasser S;
Holzmann S;
Köppel H;
Moosbrugger B;
Salzer M
Indiscriminative Effects of Repaglinide and Other Specific Modulators of Transmembrane KATP-Channel Gating Properties upon Ischaemic/Hypoxic Bovine Coronary Artery Smooth Muscle Relaxation
Koronararterien - Relaxation
Journal of Clinical and Basic Cardiology 2003; 6 (1-4): 81-85
A: Dinitrophenole (1 mM), an uncoupler of oxidative phosphorylation invariably leads to vasodilation, the latter is partially inhibited
by glibenclamide in a dose-dependent manner; B: Dose dependent inhibition of DNP-induced vasodilation; note repaglinide’s intrinsic
relaxing activity at higher doses; the inhibition of relaxation is not as pronounced as with glimepiride and glibenclamide; C: Inhibition of DNP induced relaxation is maximal under 3 µM glimepiride; the
effect of a similar dose of glibenclamide is also introduced in this figure in order to demonstrate the approximate equimolar inhibition; glimepiride is a stronger inhibitor of DNP-induced vasorelaxation than glibenclamide. Keywords: coronary artery,
diagram,
Diagramm,
Gilbenclamid,
Gilbenclamide,
Glimepirid,
glimepiride,
Koronararterie,
realxation,
Relaxation,
Repaglinid,
Repaglinide
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3. Gasser R;
Esche G;
Gasser S;
Holzmann S;
Köppel H;
Moosbrugger B;
Salzer M
Indiscriminative Effects of Repaglinide and Other Specific Modulators of Transmembrane KATP-Channel Gating Properties upon Ischaemic/Hypoxic Bovine Coronary Artery Smooth Muscle Relaxation
Koronararterien - Relaxation
Journal of Clinical and Basic Cardiology 2003; 6 (1-4): 81-85
A: Relaxation of bovine coronary arteries during hypoxia (open symbols) and its reversibility by reoxygenation; glibenclamide (2 µM) inhibits hypoxic vasodilation; glibenclamide’s intrinsic relaxing activity can be seen in the reoxygenation curve in form of a slight diminution of recovery; B: Dose dependent inhibition by repaglinide
of hypoxic vasodilation; C: Dose dependent inhibition by glimepiride of hypoxic vasodilation. The intrinsic relaxing activity of glimepiride
can be seen in form of a 17 % initial relaxation of the arteries. This effect was not so pronounced with repaglinide (B). Keywords: coronary artery,
diagram,
Diagramm,
Glibenclamid,
glibenclamide,
Glimepirid,
glimepiride,
hypoxia,
Hypoxie,
Koronararterie,
Relaxation,
Relaxation,
Repaglinid,
Repaglinide
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4. Gasser R;
Esche G;
Gasser S;
Holzmann S;
Köppel H;
Moosbrugger B;
Salzer M
Indiscriminative Effects of Repaglinide and Other Specific Modulators of Transmembrane KATP-Channel Gating Properties upon Ischaemic/Hypoxic Bovine Coronary Artery Smooth Muscle Relaxation
Koronararterien - KATP-Kanalöffner-Hemmung
Journal of Clinical and Basic Cardiology 2003; 6 (1-4): 81-85
Experiment like in Fig. 1A; repaglinide shows competitive inhibition of specific K channel openers (here shown: pinacidil). Keywords: coronary artery,
Cromakalim,
Cromakalim,
diagram,
Diagramm,
Hemmung,
inhibition,
KATP-channel,
KATP-Kanal,
Koronararterie,
Pinacidil,
Pinacidil,
Repaglinid,
Repaglinid
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5. Gasser R;
Esche G;
Gasser S;
Holzmann S;
Köppel H;
Moosbrugger B;
Salzer M
Indiscriminative Effects of Repaglinide and Other Specific Modulators of Transmembrane KATP-Channel Gating Properties upon Ischaemic/Hypoxic Bovine Coronary Artery Smooth Muscle Relaxation
Koronararterien - Muskelrelaxation
Journal of Clinical and Basic Cardiology 2003; 6 (1-4): 81-85
A: Intrinsic relaxing activity of repaglinide in bovine coronary artery in percent of maximal contraction (obtained at the end of each experiment by the addition of 2.66 × 10–4 M papaverine). Strips stabilised in length within 90 min of incubation at about 60 % of maximal shortening; B: Intrinsic relaxing activity of glimepiride at different concentrations like in 1A. Keywords: coronary artery,
diagram,
Diagramm,
Glatte Muskulatur,
Glimepirid,
glimepiride,
KATP-channel,
KATP-Kanal,
Koronararterie,
Relaxation,
Repaglinid,
Repaglinide,
smooth muscle
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6. Holzmann S;
Dittrich P;
Pöch G
Dose-response curves of vasorelaxants: computerized calculation of combination effects using the example of nicorandil
Dosiswirkungsbeziehung - Cromakalim
Journal of Clinical and Basic Cardiology 1999; 2 (1): 96-98
Cumulative dose-response curves (DRCs) of cromakalim in the absence (open symbol) and presence of 10 and 50 micromol/L nicorandil (filled symbols), a) in the absence, b) in the presence of 10 micromol/L methylene blue analogous to Figure 1. The symbols and bars represent experimental mean values from 6-12 experiments and 95 % Cl. The following theoretical curves are shown in a) bands of 95 % CI of dose-additive effects of cromakalim in the presence of 10 micromol/L nicorandil, means of independent effects of cromakalim in the presence of 10 and 50 micromol/L nicorandil, b) 95 % CI bands of dose-additive combinations of cromakalim in the presence of 10 and 50 micromol/L nicorandil. Keywords: Cromakalim,
Cromakalim,
Diagramm,
Methylenblau,
methylene blue,
Nicorandil,
Nicorandil,
vasorelaxation,
vasorelaxation
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7. Holzmann S;
Dittrich P;
Pöch G
Dose-response curves of vasorelaxants: computerized calculation of combination effects using the example of nicorandil
Dosiswirkungsbeziehung - Nitroprussid
Journal of Clinical and Basic Cardiology 1999; 2 (1): 96-98
Cumulative dose-response curves (DRCs) of nitroprusside in the absence (open symbol) and presence of 3-20 micromol/L nicorandil (filled symbols), a) in the absence, b) in the presence of 1 micromol/L glibenclamide. The symbols and bars
represent experimental mean values from 12 experiments and 95 % CI. Experimental DRCs are shown by solid lines, theoretical DRCs by dashed lines (dose-additivity) and dotted lines independence). For graphical clarity, the following theoretical curves are shown in a) bands of 95 % CI with upper and lower boundary of dose-additive
combinations of nitroprusside in the presence of 3 and 20 micromol/L nicorandil, curve of mean independent effect of nitroprusside in the presence of 20 micromol/L nicorandil, b) means of dose-additive combinations of nitroprusside with 3, 10, and 20 micromol/L nicorandil. The effects of nicorandil alone are shown on the y-axis. Significant deviation from dose-additivity is indicated by asterics. Keywords: Diagramm,
Glibenclamid,
glibenclamide,
Nicorandil,
Nicorandil,
vasorelaxation,
vasorelaxation
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