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We are analyzing https://link.springer.com/article/10.1007/s002100000391.

Title:
Effects of the cardioselective KATP channel blocker HMR 1098 on cardiac function in isolated perfused working rat hearts and in anesthetized rats during ischemia and reperfusion | Naunyn-Schmiedeberg's Archives of Pharmacology
Description:
It has been argued that activation of KATP channels in the sarcolemmal membrane of heart muscle cells during ischemia provides an endogenous cardioprotective mechanism. In order to test whether the novel cardioselective KATP channel blocker HMR 1098 affects cardiac function during ischemia, experiments were performed in rat hearts during ischemia and reperfusion. Isolated perfused working rat hearts were subjected to 30 min of low-flow ischemia in which the coronary flow was reduced to 10% of its control value, followed by 30-min reperfusion. In the first set of experiments the hearts were electrically paced at 5 Hz throughout the entire protocol. At the end of the 30-min ischemic period the aortic flow had fallen to 44±2% (n=8) of its nonischemic value in vehicle-treated hearts, whereas in the presence of 0.3 µmol/l and 3 µmol/l HMR 1098 it had fallen to 29±7% (n=5, not significant) and 8±2% (n=12, P<0.05), respectively. Glibenclamide (3 µmol/l) reduced the aortic flow to 9.5±7% (n=4, P<0.05). In control hearts the QT interval in the electrocardiogram shortened from 63±6 ms to 36±4 ms (n=10, P<0.05) within 4–6 min of low-flow ischemia. This shortening was completely prevented by 3 µmol/l HMR 1098 (60±5 ms before ischemia, 67±6 ms during ischemia, n=9, not significant). When rat hearts were not paced, the heart rate fell spontaneously during ischemia, and HMR 1098 (3 µmol/l) caused only a slight, statistically non-significant reduction in aortic flow during the ischemic period. In order to investigate whether HMR 1098 shows cardiodepressant effects in a more pathophysiological model, the left descending coronary artery was occluded for 30 min followed by reperfusion for 60 min in anesthetized rats. Treatment with HMR 1098 (10 mg/kg i.v.) had no statistically significant effects on mean arterial blood pressure and heart rate during the control, ischemia and reperfusion periods. At the end of the reperfusion period, aortic blood flow was slightly reduced by HMR 1098, without reaching statistical significance (two-way analysis of ANOVA, P=0.15). Myocardial infarct size as a percentage of area at risk was not affected by HMR 1098 (vehicle: 75±3%, HMR 1098: 72±2%, n=7 in each group). In conclusion, cardiodepressant effects of HMR 1098 were observed only in isolated perfused working rat hearts which were continuously paced during global low-flow ischemia. In the model of anesthetized rats subjected to regional ischemia, HMR 1098 had no significant effect on cardiac function or infarct size.
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Keywords {🔍}

hmr, ischemia, article, hearts, reperfusion, rat, heart, min, privacy, cookies, function, content, effects, katp, rats, channels, flow, µmoll, information, publish, search, channel, cardiac, isolated, perfused, working, anesthetized, aortic, significant, access, data, log, journal, research, cardioselective, blocker, gögelein, ruetten, albus, lowflow, reduced, control, paced, period, potassium, discover, springer, optional, analysis, personal,

Topics {✒️}

month download article/chapter dg cardiovascular diseases pore-domain potassium katp channels article naunyn-schmiedeberg' global low-flow ischemia myocardial infarct size july 2001 volume 364 privacy choices/manage cookies heart muscle cells heart failure full article pdf endogenous cardioprotective mechanism arterial blood pressure reaching statistical significance murine disease models related subjects conditions privacy policy rat hearts vehicle-treated hearts channels heart rate low-flow ischemia accepting optional cookies european economic area aortic blood flow anesthetized rats subjected check access instant access journal finder publish article gögelein main content log cardiac function heinz gögelein statistically significant effects 30-min ischemic period anesthetized rats article log information privacy policy personal data coronary flow cardiodepressant effects books a article cite optional cookies manage preferences infarct size aortic flow ischemic period

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WebPage:
      mainEntity:
         headline:Effects of the cardioselective KATP channel blocker HMR 1098 on cardiac function in isolated perfused working rat hearts and in anesthetized rats during ischemia and reperfusion
         description: It has been argued that activation of KATP channels in the sarcolemmal membrane of heart muscle cells during ischemia provides an endogenous cardioprotective mechanism. In order to test whether the novel cardioselective KATP channel blocker HMR 1098 affects cardiac function during ischemia, experiments were performed in rat hearts during ischemia and reperfusion. Isolated perfused working rat hearts were subjected to 30 min of low-flow ischemia in which the coronary flow was reduced to 10% of its control value, followed by 30-min reperfusion. In the first set of experiments the hearts were electrically paced at 5 Hz throughout the entire protocol. At the end of the 30-min ischemic period the aortic flow had fallen to 44±2% (n=8) of its nonischemic value in vehicle-treated hearts, whereas in the presence of 0.3 µmol/l and 3 µmol/l HMR 1098 it had fallen to 29±7% (n=5, not significant) and 8±2% (n=12, P<0.05), respectively. Glibenclamide (3 µmol/l) reduced the aortic flow to 9.5±7% (n=4, P<0.05). In control hearts the QT interval in the electrocardiogram shortened from 63±6 ms to 36±4 ms (n=10, P<0.05) within 4–6 min of low-flow ischemia. This shortening was completely prevented by 3 µmol/l HMR 1098 (60±5 ms before ischemia, 67±6 ms during ischemia, n=9, not significant). When rat hearts were not paced, the heart rate fell spontaneously during ischemia, and HMR 1098 (3 µmol/l) caused only a slight, statistically non-significant reduction in aortic flow during the ischemic period. In order to investigate whether HMR 1098 shows cardiodepressant effects in a more pathophysiological model, the left descending coronary artery was occluded for 30 min followed by reperfusion for 60 min in anesthetized rats. Treatment with HMR 1098 (10 mg/kg i.v.) had no statistically significant effects on mean arterial blood pressure and heart rate during the control, ischemia and reperfusion periods. At the end of the reperfusion period, aortic blood flow was slightly reduced by HMR 1098, without reaching statistical significance (two-way analysis of ANOVA, P=0.15). Myocardial infarct size as a percentage of area at risk was not affected by HMR 1098 (vehicle: 75±3%, HMR 1098: 72±2%, n=7 in each group). In conclusion, cardiodepressant effects of HMR 1098 were observed only in isolated perfused working rat hearts which were continuously paced during global low-flow ischemia. In the model of anesthetized rats subjected to regional ischemia, HMR 1098 had no significant effect on cardiac function or infarct size.
         datePublished:
         dateModified:
         pageStart:33
         pageEnd:41
         sameAs:https://doi.org/10.1007/s002100000391
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            KATP channel Heart Ischemia HMR 1098 HMR 1883 Rat Myocardial contractility
            Pharmacology/Toxicology
            Neurosciences
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               name:Heinz Gögelein
               affiliation:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                     address:
                        name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
                        type:PostalAddress
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               name:Hartmut Ruetten
               affiliation:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                     address:
                        name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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               name:Udo Albus
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                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                     address:
                        name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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                        name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
                        type:PostalAddress
                     type:Organization
               type:Person
               name:Andreas E. Busch
               affiliation:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                     address:
                        name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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      headline:Effects of the cardioselective KATP channel blocker HMR 1098 on cardiac function in isolated perfused working rat hearts and in anesthetized rats during ischemia and reperfusion
      description: It has been argued that activation of KATP channels in the sarcolemmal membrane of heart muscle cells during ischemia provides an endogenous cardioprotective mechanism. In order to test whether the novel cardioselective KATP channel blocker HMR 1098 affects cardiac function during ischemia, experiments were performed in rat hearts during ischemia and reperfusion. Isolated perfused working rat hearts were subjected to 30 min of low-flow ischemia in which the coronary flow was reduced to 10% of its control value, followed by 30-min reperfusion. In the first set of experiments the hearts were electrically paced at 5 Hz throughout the entire protocol. At the end of the 30-min ischemic period the aortic flow had fallen to 44±2% (n=8) of its nonischemic value in vehicle-treated hearts, whereas in the presence of 0.3 µmol/l and 3 µmol/l HMR 1098 it had fallen to 29±7% (n=5, not significant) and 8±2% (n=12, P<0.05), respectively. Glibenclamide (3 µmol/l) reduced the aortic flow to 9.5±7% (n=4, P<0.05). In control hearts the QT interval in the electrocardiogram shortened from 63±6 ms to 36±4 ms (n=10, P<0.05) within 4–6 min of low-flow ischemia. This shortening was completely prevented by 3 µmol/l HMR 1098 (60±5 ms before ischemia, 67±6 ms during ischemia, n=9, not significant). When rat hearts were not paced, the heart rate fell spontaneously during ischemia, and HMR 1098 (3 µmol/l) caused only a slight, statistically non-significant reduction in aortic flow during the ischemic period. In order to investigate whether HMR 1098 shows cardiodepressant effects in a more pathophysiological model, the left descending coronary artery was occluded for 30 min followed by reperfusion for 60 min in anesthetized rats. Treatment with HMR 1098 (10 mg/kg i.v.) had no statistically significant effects on mean arterial blood pressure and heart rate during the control, ischemia and reperfusion periods. At the end of the reperfusion period, aortic blood flow was slightly reduced by HMR 1098, without reaching statistical significance (two-way analysis of ANOVA, P=0.15). Myocardial infarct size as a percentage of area at risk was not affected by HMR 1098 (vehicle: 75±3%, HMR 1098: 72±2%, n=7 in each group). In conclusion, cardiodepressant effects of HMR 1098 were observed only in isolated perfused working rat hearts which were continuously paced during global low-flow ischemia. In the model of anesthetized rats subjected to regional ischemia, HMR 1098 had no significant effect on cardiac function or infarct size.
      datePublished:
      dateModified:
      pageStart:33
      pageEnd:41
      sameAs:https://doi.org/10.1007/s002100000391
      keywords:
         KATP channel Heart Ischemia HMR 1098 HMR 1883 Rat Myocardial contractility
         Pharmacology/Toxicology
         Neurosciences
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      isPartOf:
         name:Naunyn-Schmiedeberg's Archives of Pharmacology
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            1432-1912
            0028-1298
         volumeNumber:364
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            Periodical
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         name:Springer-Verlag
         logo:
            url:https://www.springernature.com/app-sn/public/images/logo-springernature.png
            type:ImageObject
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      author:
            name:Heinz Gögelein
            affiliation:
                  name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                  address:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
                     type:PostalAddress
                  type:Organization
            type:Person
            name:Hartmut Ruetten
            affiliation:
                  name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                  address:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
                     type:PostalAddress
                  type:Organization
            type:Person
            name:Udo Albus
            affiliation:
                  name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                  address:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
                     type:PostalAddress
                  type:Organization
            type:Person
            name:Heinrich C. Englert
            affiliation:
                  name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
                  address:
                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
                     type:PostalAddress
                  type:Organization
            type:Person
            name:Andreas E. Busch
            affiliation:
                  name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
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                     name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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         name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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      name:Heinz Gögelein
      affiliation:
            name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
            address:
               name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
               type:PostalAddress
            type:Organization
      name:Hartmut Ruetten
      affiliation:
            name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
            address:
               name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
               type:PostalAddress
            type:Organization
      name:Udo Albus
      affiliation:
            name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
            address:
               name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
               type:PostalAddress
            type:Organization
      name:Heinrich C. Englert
      affiliation:
            name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
            address:
               name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
               type:PostalAddress
            type:Organization
      name:Andreas E. Busch
      affiliation:
            name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany
            address:
               name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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      name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
      name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
      name:Aventis Pharma Deutschland GmbH, DG Cardiovascular Diseases, Bldg. H 821, 65926 Frankfurt am Main, Germany,
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