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Rayo Abella LM, Jacob H, Keller M, Schindler L, Pockes S, Pitzl S, Klimas J, Hadova K, Schneider S, Buchwalow IB, Jin C, Panula P, Kirchhefer U, Neumann J, Gergs U. Initial Characterization of a Transgenic Mouse with Overexpression of the Human H 1-Histamine Receptor on the Heart. J Pharmacol Exp Ther 2024; 389:174-185. [PMID: 38531640 DOI: 10.1124/jpet.123.002060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/14/2024] [Accepted: 02/20/2024] [Indexed: 03/28/2024] Open
Abstract
There is a debate on whether H1-histamine receptors can alter contractility in the mammalian heart. We studied here a new transgenic mouse model where we increased genetically the cardiac level of the H1-histamine receptor. We wanted to know if histamine could augment or decrease contractile parameters in mice with cardiac-specific overexpression of human H1-histamine receptors (H1-TG) and compared these findings with those in littermate wild-type mice (WT). In H1-TG mice, we studied the presence of H1-histamine receptors by autoradiography of the atrium and ventricle using [3H]mepyramine. The messenger RNA for human H1-histamine receptors was present in the heart from H1-TG and absent from WT. Using in situ hybridization, we noted mRNA for the human H1-histamine receptor in cardiac cells from H1-TG. We noted that histamine (1 nM-10 µM) in paced (1 Hz) left atrial preparations from H1-TG, exerted at each concentration of histamine initially reduced force of contraction and then raised contractile force. Likewise, in spontaneously beating left atrial preparations from H1-TG, we noted that histamine led to a transient reduction in the spontaneous beating rate followed by an augmentation in the beating rate. The negative inotropic and chronotropic and the positive inotropic effects on histamine in isolated atrial muscle strips from H1-TG were attenuated by the H1-histamine receptor antagonist mepyramine. Histamine failed to exert an increased force or reduce the heartbeat in atrial preparations from WT. We concluded that stimulation of H1-histamine-receptors can decrease and then augment contractile force in the mammalian heart and stimulation of H1-histamine receptors exerts a negative chronotropic effect. SIGNIFICANCE STATEMENT: We made novel transgenic mice with cardiomyocyte-specific high expressional levels of the human H1-histamine receptor to contribute to the clarification of the controversy on whether H1-histamine receptors increase or decrease contractility and beating rate in the mammalian heart. From our data, we conclude that stimulation of H1-histamine receptors first decrease and then raise contractile force in the mammalian heart but exert solely negative chronotropic effects.
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Affiliation(s)
- Lina Maria Rayo Abella
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Hannes Jacob
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Max Keller
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Lisa Schindler
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Steffen Pockes
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Sebastian Pitzl
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Jan Klimas
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Katarína Hadova
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Sarah Schneider
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Igor B Buchwalow
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - CongYu Jin
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Pertti Panula
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Uwe Kirchhefer
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Joachim Neumann
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
| | - Ulrich Gergs
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (L.M.R.A., H.J., S.S., J.N., U.G.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (M.K., L.S., S.Po., S.Pi.); Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic (J.K., K.H.); Institute for Hematopathology, Hamburg, Germany and Scientific and Educational Resource Center for Molecular Morphology, Peoples' FriendshipUniversity of Russia, Moscow, Russia (I.B.B.); Department of Anatomy, University of Helsinki, Helsinki, Finland (C.J., P.P.); Institute of Pharmacology and Toxicology, Westfälische Wilhelms-University of Münster, Münster, Germany (U.K.)
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Gergs U, Jacob H, Braekow P, Hofmann B, Pockes S, Humphrys LJ, Kirchhefer U, Fehse C, Neumann J. Lysergic acid diethylamide stimulates cardiac human H 2 histamine and cardiac human 5-HT 4-serotonin receptors. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:221-236. [PMID: 37401967 PMCID: PMC10771359 DOI: 10.1007/s00210-023-02591-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/19/2023] [Indexed: 07/05/2023]
Abstract
Lysergic acid diethylamide (LSD) is an artificial hallucinogenic drug. Thus, we hypothesized that LSD might act 5-HT4 serotonin receptors and/or H2 histamine receptors. We studied isolated electrically stimulated left atrial preparations, spontaneously beating right atrial preparations, and spontaneously beating Langendorff-perfused hearts from transgenic mice with cardiomyocyte-specific overexpression of the human 5-HT4 receptor (5-HT4-TG) or of the H2-histamine receptor (H2-TG). For comparison, we used wild type littermate mice (WT). Finally, we measured isometric force of contraction in isolated electrically stimulated muscle strips from the human right atrium obtained from patients during bypass surgery. LSD (up to 10 µM) concentration dependently increased force of contraction and beating rate in left or right atrial preparations from 5-HT4-TG (n = 6, p < 0.05) in 5-HT4-TG atrial preparations. The inotropic and chronotropic effects of LSD were antagonized by 10 µM tropisetron in 5-HT4-TG. In contrast, LSD (10 µM) increased force of contraction and beating rate in left or right atrial preparations, from H2-TG. After pre-stimulation with cilostamide (1 µM), LSD (10 µM) increased force of contraction in human atrial preparations (n = 6, p < 0.05). The contractile effects of LSD in human atrial preparations could be antagonized by 10 µM cimetidine and 1 µM GR 125487. LSD leads to H2-histamine receptor and 5-HT4-receptor mediated cardiac effects in humans.
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Affiliation(s)
- Ulrich Gergs
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
| | - Hannes Jacob
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
| | - Pauline Braekow
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
| | - Britt Hofmann
- Department of Cardiac Surgery, Mid-German Heart Center, University Hospital Halle, Ernst Grube Straße 40, 06097, Halle (Saale), Germany
| | - Steffen Pockes
- Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany
| | - Laura J Humphrys
- Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany
| | - Uwe Kirchhefer
- Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Domagkstraße 12, 48149, Münster, Germany
| | - Charlotte Fehse
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
| | - Joachim Neumann
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany.
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Jacob H, Braekow P, Hofmann B, Kirchhefer U, Forster L, Mönnich D, Humphrys LJ, Pockes S, Neumann J, Gergs U. Ergometrine stimulates histamine H 2 receptors in the isolated human atrium. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:3809-3822. [PMID: 37354215 PMCID: PMC10643397 DOI: 10.1007/s00210-023-02573-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 06/11/2023] [Indexed: 06/26/2023]
Abstract
Ergometrine (6aR,9R)-N-((S)-1-hydroxypropan-2-yl)-7-methyl-4,6,6a,7,8,9-hexa-hydro-indolo-[4,3-fg]chinolin-9-carboxamide or lysergide acid β-ethanolamide or ergonovine) activates several types of serotonin and histamine receptors in the animal heart. We thus examined whether ergometrine can activate human serotonin 5-HT4 receptors (h5-HT4R) and/or human histamine H2 receptors (hH2R) in the heart of transgenic mice and/or in the human isolated atrium. Force of contraction or beating rates were studied in electrically stimulated left atrial or spontaneously beating right atrial preparations or spontaneously beating isolated retrogradely perfused hearts (Langendorff setup) of mice with cardiac specific overexpression of the h5-HT4R (5-HT4-TG) or of mice with cardiac specific overexpression of the hH2R (H2-TG) or in electrically stimulated human right atrial preparations obtained during cardiac surgery. Western blots to assess phospholamban (PLB) phosphorylation on serine 16 were performed. Ergometrine exerted concentration- and time-dependent positive inotropic effects and positive chronotropic effects in atrial preparations starting at 0.3 µM and reaching a plateau at 10 µM in H2-TGs (n = 7). This was accompanied by an increase in PLB phosphorylation at serine 16. Ergometrine up 10 µM failed to increase force of contraction in left atrial preparations from 5-HT4-TGs (n = 5). Ten micrometer ergometrine increased the force of contraction in isolated retrogradely perfused spontaneously beating heart preparations (Langendorff setup) from H2-TG but not 5-HT4-TG. In the presence of the phosphodiesterase inhibitor cilostamide (1 µM), ergometrine at 10 µM exerted positive inotropic effects in isolated electrically stimulated human right atrial preparations, obtained during cardiac surgery, and these effects were eliminated by 10 µM of the H2R antagonist cimetidine but not by 10 µM of the 5-HT4R antagonist tropisetron. Furthermore, ergometrine showed binding to human histamine H2 receptors (at 100 µM and 1 mM) using HEK cells in a recombinant expression system (pKi < 4.5, n = 3). In conclusion, we suggest that ergometrine is an agonist at cardiac human H2Rs.
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Affiliation(s)
- Hannes Jacob
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
| | - Pauline Braekow
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
| | - Britt Hofmann
- Department of Cardiac Surgery, Mid-German Heart Center, University Hospital Halle, Ernst Grube Straße 40, 06097, Halle (Saale), Germany
| | - Uwe Kirchhefer
- Institute for Pharmacology and Toxicology, Medical Faculty, Westfälische Wilhelms- Universität Münster, Domagkstraße 12, 48149, Münster, Germany
| | - Lisa Forster
- Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany
| | - Denise Mönnich
- Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany
| | - Laura J Humphrys
- Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany
| | - Steffen Pockes
- Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93040, Regensburg, Germany
| | - Joachim Neumann
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany.
| | - Ulrich Gergs
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany
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Jacob H, Braekow P, Schwarz R, Höhm C, Kirchhefer U, Hofmann B, Neumann J, Gergs U. Ergotamine Stimulates Human 5-HT 4-Serotonin Receptors and Human H 2-Histamine Receptors in the Heart. Int J Mol Sci 2023; 24:ijms24054749. [PMID: 36902177 PMCID: PMC10003312 DOI: 10.3390/ijms24054749] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/06/2023] Open
Abstract
Ergotamine (2'-methyl-5'α-benzyl-12'-hydroxy-3',6',18-trioxoergotaman) is a tryptamine-related alkaloid from the fungus Claviceps purpurea. Ergotamine is used to treat migraine. Ergotamine can bind to and activate several types of 5-HT1-serotonin receptors. Based on the structural formula of ergotamine, we hypothesized that ergotamine might stimulate 5-HT4-serotonin receptors or H2-histamine receptors in the human heart. We observed that ergotamine exerted concentration- and time-dependent positive inotropic effects in isolated left atrial preparations in H2-TG (mouse which exhibits cardiac-specific overexpression of the human H2-histamine receptor). Similarly, ergotamine increased force of contraction in left atrial preparations from 5-HT4-TG (mouse which exhibits cardiac-specific overexpression of the human 5-HT4-serotonin receptor). An amount of 10 µM ergotamine increased the left ventricular force of contraction in isolated retrogradely perfused spontaneously beating heart preparations of both 5-HT4-TG and H2-TG. In the presence of the phosphodiesterase inhibitor cilostamide (1 µM), ergotamine 10 µM exerted positive inotropic effects in isolated electrically stimulated human right atrial preparations, obtained during cardiac surgery, that were attenuated by 10 µM of the H2-histamine receptor antagonist cimetidine, but not by 10 µM of the 5-HT4-serotonin receptor antagonist tropisetron. These data suggest that ergotamine is in principle an agonist at human 5-HT4-serotonin receptors as well at human H2-histamine receptors. Ergotamine acts as an agonist on H2-histamine receptors in the human atrium.
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Affiliation(s)
- Hannes Jacob
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Pauline Braekow
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Rebecca Schwarz
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Christian Höhm
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Uwe Kirchhefer
- Institute for Pharmacology and Toxicology, Medical Faculty, Westfälische Wilhelms-Universität, 48149 Münster, Germany
| | - Britt Hofmann
- Department of Cardiac Surgery, Mid-German Heart Center, University Hospital Halle, 06120 Halle (Saale), Germany
| | - Joachim Neumann
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
- Correspondence:
| | - Ulrich Gergs
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
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Neumann J, Kirchhefer U, Dhein S, Hofmann B, Gergs U. The Roles of Cardiovascular H 2-Histamine Receptors Under Normal and Pathophysiological Conditions. Front Pharmacol 2022; 12:732842. [PMID: 34987383 PMCID: PMC8720924 DOI: 10.3389/fphar.2021.732842] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/02/2021] [Indexed: 12/11/2022] Open
Abstract
This review addresses pharmacological, structural and functional relationships among H2-histamine receptors and H1-histamine receptors in the mammalian heart. The role of both receptors in the regulation of force and rhythm, including their electrophysiological effects on the mammalian heart, will then be discussed in context. The potential clinical role of cardiac H2-histamine-receptors in cardiac diseases will be examined. The use of H2-histamine receptor agonists to acutely increase the force of contraction will be discussed. Special attention will be paid to the potential role of cardiac H2-histamine receptors in the genesis of cardiac arrhythmias. Moreover, novel findings on the putative role of H2-histamine receptor antagonists in treating chronic heart failure in animal models and patients will be reviewed. Some limitations in our biochemical understanding of the cardiac role of H2-histamine receptors will be discussed. Recommendations for further basic and translational research on cardiac H2-histamine receptors will be offered. We will speculate whether new knowledge might lead to novel roles of H2-histamine receptors in cardiac disease and whether cardiomyocyte specific H2-histamine receptor agonists and antagonists should be developed.
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Affiliation(s)
- Joachim Neumann
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Uwe Kirchhefer
- Institut für Pharmakologie und Toxikologie, Westfälische Wilhelms-Universität, Münster, Germany
| | - Stefan Dhein
- Landratsamt Altenburger Land, Altenburg, Germany
| | - Britt Hofmann
- Herzchirurgie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Ulrich Gergs
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
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Human histamine H 2 receptors can initiate cardiac arrhythmias in a transgenic mouse. Naunyn Schmiedebergs Arch Pharmacol 2021; 394:1963-1973. [PMID: 34164710 PMCID: PMC8376741 DOI: 10.1007/s00210-021-02098-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/04/2021] [Indexed: 02/06/2023]
Abstract
Histamine is known to lead to arrhythmias in the human heart. A mouse model to mimic these effects has hitherto not been available but might be useful to study the mechanism(s) of H2-histamine receptor-induced arrhythmias and may support the search for new antiarrhythmic drugs. In order to establish such a model in mice, we studied here the incidence of cardiac arrhythmias under basal and under stimulated conditions in atrial and ventricular preparations from mice that overexpressed the human H2-histamine receptors in a cardiac-specific way (H2-TG) in comparison with their wild-type (WT) littermate controls. We had shown before that histamine exerted concentration and time-dependent positive inotropic and positive chronotropic effects only in cardiac preparations from H2-TG and not from WT. We noted under basal conditions (no drug addition) that right atrial preparations from H2-TG exhibited more spontaneous arrhythmias than right atrial preparations from WT. These arrhythmias in H2-TG could be blocked by the H2-histamine receptor antagonist cimetidine. In a similar fashion, histamine and dimaprit (an agonist at H2 and not H1-histamine receptors) more often induced arrhythmias in right atrial preparations from H2-TG than from WT. To understand better the signal transduction mechanism(s) involved in these arrhythmias, we studied partially depolarized left atrial preparations. In these preparations, a positive inotropic effect of histamine was still present in the additional presence of 44 mM potassium ions (used to block sodium channels) in H2-TG but not WT and this positive inotropic effect could be blocked by cimetidine and this is consistent with the involvement of calcium ion channels in the contractile and thus might mediate also the arrhythmogenic effects of histamine in H2-TG. However, compounds reported to release histamine from cells and thereby leading to arrhythmias in humans, namely morphine, ketamine, and fentanyl, failed to induce a more pronounced positive inotropic effect in atrial preparations from H2-TG compared to WT, arguing against an involvement of histamine release in their proarrhythmic side effects in patients. Measuring left ventricular contractility in isolated retrogradely perfused hearts (Langendorff mode), we detected under basal conditions (no drug application) more spontaneous arrhythmias in hearts from H2-TG than from WT. In summary, we noted that overexpression of human H2-histamine receptors in a novel transgenic animal model can lead to arrhythmias. We suggest that this model might be useful to understand the mechanism(s) of histamine-induced cardiac arrhythmias in humans better in a molecular way and may be of value to screen novel antiarrhythmic drugs.
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Neumann J, Grobe JM, Weisgut J, Schwelberger HG, Fogel WA, Marušáková M, Wache H, Bähre H, Buchwalow IB, Dhein S, Hofmann B, Kirchhefer U, Gergs U. Histamine can be Formed and Degraded in the Human and Mouse Heart. Front Pharmacol 2021; 12:582916. [PMID: 34045955 PMCID: PMC8144513 DOI: 10.3389/fphar.2021.582916] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 04/19/2021] [Indexed: 12/22/2022] Open
Abstract
Histamine is metabolized by several enzymes in vitro and in vivo. The relevance of this metabolism in the mammalian heart in vivo is unclear. However, histamine can exert positive inotropic effects (PIE) and positive chronotropic effects (PCE) in humans via H2-histamine receptors. In transgenic mice (H2-TG) that overexpress the human H2 receptor in cardiomyocytes but not in wild-type littermate mice (WT), histamine induced PIE and PCE in isolated left or right atrial preparations. These H2-TG were used to investigate the putative relevance of histamine degrading enzymes in the mammalian heart. Histidine, the precursor of histamine, increased force of contraction (FOC) in human atrial preparations. Moreover, histamine increased the phosphorylation state of phospholamban in human atrium. Here, we could detect histidine decarboxylase (HDC) and histamine itself in cardiomyocytes of mouse hearts. Moreover, our data indicate that histamine is subject to degradation in the mammalian heart. Inhibition of the histamine metabolizing enzymes diamine oxidase (DAO) and monoamine oxidase (MAO) shifted the concentration response curves for the PIE in H2-TG atria to the left. Moreover, activity of histamine metabolizing enzymes was present in mouse cardiac samples as well as in human atrial samples. Thus, drugs used for other indication (e.g. antidepressants) can alter histamine levels in the heart. Our results deepen our understanding of the physiological role of histamine in the mouse and human heart. Our findings might be clinically relevant because we show enzyme targets for drugs to modify the beating rate and force of the human heart.
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Affiliation(s)
- Joachim Neumann
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Juliane M Grobe
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Jacqueline Weisgut
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Hubert G Schwelberger
- Department of Visceral, Transplant and Thoracic Surgery, Molecular Biology Laboratory, Medical University Innsbruck, Innsbruck, Austria
| | | | - Margaréta Marušáková
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Hartmut Wache
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Heike Bähre
- Research Core Unit Metabolomics and Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | | | - Stefan Dhein
- Klinik für Herzchirurgie, Herzzentrum der Universität Leipzig, Leipzig, Germany
| | - Britt Hofmann
- Department of Cardiothoracic Surgery, Heart Centre of the University Clinics Halle (Saale), Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Uwe Kirchhefer
- Institut für Pharmakologie und Toxikologie, Universitätsklinikum Münster, Westfälische Wilhelms-Universität, Münster, Germany
| | - Ulrich Gergs
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
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Gergs U, Bernhardt G, Buchwalow IB, Edler H, Fröba J, Keller M, Kirchhefer U, Köhler F, Mißlinger N, Wache H, Neumann J. Initial Characterization of Transgenic Mice Overexpressing Human Histamine H 2 Receptors. J Pharmacol Exp Ther 2019; 369:129-141. [PMID: 30728249 DOI: 10.1124/jpet.118.255711] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 01/25/2019] [Indexed: 11/22/2022] Open
Abstract
In an integrative approach, we studied the role of histamine H2 receptors in the mouse heart. We noted that histamine, added cumulatively to the organ bath, failed to affect the force of contraction in left atrial preparations and did not change spontaneous heart rate in right atrial preparations from wild-type mice. By contrast, in the same preparations from mice that overexpressed the human H2 receptor in a cardiac-specific way, histamine exerted concentration- and time-dependent positive inotropic and positive chronotropic effects. Messenger RNA of the human H2 receptor was only detected in transgenic mice. Likewise, immunohistology and autoradiography only gave signals in transgenic but not in wild-type cardiac preparations. Similarly, a positive inotropic and positive chronotropic effect was observed with histamine in echocardiography of living transgenic mice and isolated perfused hearts (Langendorff preparation). Phosphorylation of phospholamban was increased in atrial and ventricular preparations from transgenic mice, but not in wild-type animals. The effects of histamine were mimicked by dimaprit and amthamine and antagonized by cimetidine. In summary, we generated a new model to study the physiologic and pathophysiologic cardiac role of the human H2 receptor.
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Affiliation(s)
- U Gergs
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - G Bernhardt
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - I B Buchwalow
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - H Edler
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - J Fröba
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - M Keller
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - U Kirchhefer
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - F Köhler
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - N Mißlinger
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - H Wache
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
| | - J Neumann
- Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (U.G., H.E., J.F., F.K., N.M., H.W., J.N.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (G.B., M.K.); Institute for Hematopathology, Hamburg, Germany (I.B.B.); and Institute for Pharmacology and Toxicology, University Hospital Münster, Westfälische Wilhelms-University, Münster, Germany (U.K.)
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9
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Valen G, Skjelbakken T, Vaage J. The effects of exogenous histamine in isolated rat hearts. Mol Cell Biochem 1995; 146:55-61. [PMID: 7651378 DOI: 10.1007/bf00926882] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The role of histamine in cardiac physiology and pathophysiology is not clarified, but is dependent on species. The effects of exogenous histamine in Langendorff-perfused rat hearts were investigated. 1 mM, 100, 10, 1 and 0.1 microM of histamine (n = 7 each) as 15 min infusions were employed in a dose-response study, and compared to control perfused hearts (n = 7). In another experimental series, 100 microM histamine (n = 15) was added during reperfusion after 25 min global ischemia, and compared to control ischemia-reperfusion (n = 15). The maximal response to histamine in the dose-response study (100 microM) was an increase of left ventricular developed pressure to 126 +/- 8% of initial value (mean +/- SEM, p < 0.04), and increase of coronary flow to 152+6% (p < 0.02) after 5 min infusion. 100 microM histamine did not significantly influence heart rate or rhythm. The lowest concentration (0.1 microM) did not have effects cardiac performance. Reperfusion with histamine for 2 min after ischemia reduced left ventricular developed pressure to 68 +/- 10% of initial value versus 116+17% in ischemic controls (p < 0.05), and increased left ventricular end-diastolic pressure to 24 +/- 8 mmHg compared to 6 +/- 2 mmHg in controls (p < 0.04). Left ventricular pressures were similar in hearts reperfused with histamine and in ischemic controls for the rest of the observation. Coronary flow increased during reperfusion in hearts given histamine. Histamine had a dose-dependent positive inotropic and vasodilatory effect in isolated rat hearts. Exogenous histamine had only minor effects on post-ischemic cardiac function.
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Affiliation(s)
- G Valen
- Department of Surgery, University of Tromsø, Norway, Sweden
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10
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Satoh H. Modulation of the automaticity by histamine and cimetidine in rabbit sino-atrial node cells. GENERAL PHARMACOLOGY 1993; 24:1213-22. [PMID: 7505758 DOI: 10.1016/0306-3623(93)90371-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
1. Effects of histamine (HIS) and cimetidine (CIM) on the spontaneous action potentials and ionic currents in rabbit sino-atrial node cells were investigated. 2. HIS accelerated the sinus rate at 10 mumol/l, and shortened the action potential duration (APD) at 100 mumol/l, significantly. The positive effects were blocked by CIM (100 mumol/l), but not by diphenhydramine (DPH, 1 mumol/l). HIS (100 mumol/l) elicited a dysrhythmia in 4 out of 10 preparations. Addition of acetylcholine (ACh) (1 mumol/l) depressed the HIS-induced effects, but dysrhythmia occurred in 5 of 10 preparations. 3. CIM (100 mumol/l) caused a negative chronotropic effect. The APD was prolonged, and the Vmax was decreased. Addition of pindolol (0.1 mumol/l) potentiated the depressions. CIM (3 mmol/l) caused a sinus arrest in 3 out of 7 preparations. 4. In voltage-clamp experiments, HIS (100 mumol/l) enhanced the slow inward current (Isi). The delayed rectifying K+ current (IK) and hyperpolarization-activated inward current (Ih) were also increased. The enhancement was inhibited by CIM (100 mumol/l), but not by DPH (1 mumol/l). CIM (100 mumol/l) alone depressed Isi, IK and Ih. Pindolol (0.1 mumol/l) potentiated the CIM-induced depressions significantly. 5. These results suggest that HIS and CIM would modulate the ionic currents mediated through H2-receptors, and that HIS possesses arrhythmogenic action (probably by cAMP accumulation), which is potentiated by ACh.
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Affiliation(s)
- H Satoh
- Department of Pharmacology, Nara Medical University, Japan
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11
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Myocardial damage induced by tropical rattlesnake (Crotalus durissus terrificus) venom in rats. Cardiovasc Pathol 1993; 2:77-81. [DOI: 10.1016/1054-8807(93)90016-u] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/1992] [Accepted: 11/20/1992] [Indexed: 11/18/2022] Open
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12
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Dai S. Circulatory depression and ventricular arrhythmias induced by compound 48/80 in anaesthetized rats. AGENTS AND ACTIONS 1991; 34:316-23. [PMID: 1810144 DOI: 10.1007/bf01988722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The effects of graded doses of compound 48/80 on various cardiovascular and respiratory parameters were studied in pentobarbitone-anaesthetized rats. Following intravenous injections, this compound significantly depressed the mean blood pressure (MBP), left ventricular pressure (LVP) and dLVP/dtmax, and caused ventricular tachycardia (VT) or fibrillation (VF) and death. Heart rate (HR) response were variable, and there were no marked changes in airway resistance or blood gases. Pretreatment of the animals with either cimetidine or diphenhydramine significantly prolonged the time of onset of VT/VF but failed to alter the changes in other circulatory variables. A combination of cimetidine and diphenhydramine significantly alleviated the decreases in MBP and LVP and prevented the occurrence of VT/VF. It is suggested that the circulatory depression and the occurrence of ventricular arrhythmias following the administration of compound 48/80 result from activation of H1- and H2-receptors by elevated blood histamine levels due to release of the amine from tissues.
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Affiliation(s)
- S Dai
- Department of Pharmacology, Faculty of Medicine, University of Hong Kong
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13
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Stanford SC, Gettins D, Little HJ. Adverse effects on rat cardiac function ex vivo after repeated administration of the benzodiazepine partial inverse agonist, FG7142. Br J Pharmacol 1990; 99:441-4. [PMID: 2158841 PMCID: PMC1917342 DOI: 10.1111/j.1476-5381.1990.tb12946.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
1. The Langendorff preparation was used to investigate functional changes in rat heart one week after the last of a course of repeated injections of the benzodiazepine inverse agonist, FG7142 (20 mg kg-1 i.p; three times weekly for five weeks). 2. Under these conditions, FG7142 caused a statistically significant reduction in both cardiac basal tension and the inotropic effect of noradrenaline at doses giving 50 and 100% of the maximum response. 3. Basal heart rate, basal coronary perfusion pressure and the effects of noradrenaline ex vivo on these parameters were all unaffected by repeated administration of FG7142. 4. FG7142 had no intrinsic effects on cardiac function when administered in vitro. 5. We discuss mechanisms which could underlie the effects of FG7142 on cardiac tension ex vivo and consider the possibility that this action may be related to the anxiogenic or proconvulsant actions of this drug.
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Affiliation(s)
- S C Stanford
- Department of Pharmacology, University College & Middlesex School of Medicine, London
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14
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Abstract
1. The effects of hypoxia, histamine-receptor agonist perfusion, and their combination on cardiac rhythm were studied in isolated rat hearts. 2. While hypoxia induced a high incidence of ventricular tachycardia or fibrillation, only a few preparations developed ventricular arrhythmias in response to perfusion with high concentration of histamine, 2-pyridylethylamine or impromidine. 3. The times of onset of hypoxia-induced ventricular arrhythmias were significantly shortened by perfusion with either histamine, 2-pyridylethylamine or impromidine. The accelerated occurrence of hypoxia-induced ventricular arrhythmias by histamine was significantly abolished by pretreatment with either diphenhydramine or cimetidine. 4. The results indicate that hypoxia and histamine can increase ventricular vulnerability of the rat heart to each other. It is also suggested that the arrhythmogenic actions of histamine in hypoxic rat hearts are mediated by both histamine H1-and H2-receptors.
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Affiliation(s)
- S Dai
- Department of Pharmacology, Faculty of Medicine, University of Hong Kong
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15
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Temma K, Akamine M, Shimizu T, Kitazawa T, Kondo H, Ohta T. Histamine directly acts on beta-adrenoceptors as well as H1-histaminergic receptors, and causes positive inotropic effects in isolated ventricular muscles of carp heart (Cyprinus carpio). COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. C, COMPARATIVE PHARMACOLOGY AND TOXICOLOGY 1989; 92:143-8. [PMID: 2566436 DOI: 10.1016/0742-8413(89)90217-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
1. The mechanism for positive and negative inotropic effects of histamine was studied in electrically stimulated ventricular strips of carp heart. 2. A high concentration of histamine (1 mM) caused a transient negative, and subsequent positive inotropic effects. The positive effect was significantly reduced by pyrilamine, diphenhydramine or dl-propranolol, but was not affected by cimetidine or d-propranolol. 3. Prior treatment with reserpine significantly decreased epinephrine and norepinephrine contents in ventricular muscles, and also almost completely abolished the positive inotropic effect caused by tyramine; however, this treatment failed to affect the positive inotropic effect of histamine. 4. The transient negative inotropic effect was reduced by neither atropine, diphenhydramine, pyrilamine nor cimetidine, and potentiated by pyrilamine. 5. These results suggest that the positive inotropic effect of histamine observed in the ventricular muscle of carp heart is mediated by a direct stimulation of both H1-receptors and beta-adrenoceptors. The negative inotropic effect is unrelated to either cholinergic or histaminergic receptor stimulation.
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Affiliation(s)
- K Temma
- Department of Veterinary Pharmacology, School of Veterinary Medicine and Animal Sciences, Kitasato University, Aomori, Japan
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16
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Dai S. Ventricular histamine concentrations and arrhythmias during acute myocardial ischaemia in rats. AGENTS AND ACTIONS 1987; 21:66-71. [PMID: 2442982 DOI: 10.1007/bf01974923] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The relation between ventricular histamine concentrations and the occurrence of early ventricular arrhythmias during acute myocardial ischaemia was investigated in pentobarbitone-anaesthetized rats. There was significant decrease in the left, but not the right, ventricular histamine level at 5 min following acute left coronary artery ligation. Pretreatment with rhodanine caused remarkable reduction in ventricular histamine concentrations as well as significantly lower incidence and slower onset of ventricular tachycardia and fibrillation resulting from acute myocardial ischaemia. On the contrary, aminoguanidine pretreatment did not significantly alter ventricular histamine levels nor did it influence the occurrence of early ventricular arrhythmias induced by coronary artery ligation. The responses of blood pressure and heart rate to acute coronary artery ligation were not noticeably affected by rhodanine or aminoguanidine pretreatment. These findings support the hypothesis that histamine release from cardiac tissues may contribute to the genesis of early ventricular arrhythmias, but not to the changes in blood pressure and heart rate, during acute myocardial ischaemia.
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17
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Dai S. Cardiovascular effects of ranitidine and cimetidine during acute myocardial ischaemia in anaesthetized dogs. AGENTS AND ACTIONS 1986; 19:26-33. [PMID: 2879430 DOI: 10.1007/bf01977252] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effects of ranitidine and cimetidine on ventricular fibrillation threshold and haemodynamics were studied in pentobarbitone-anaesthetized dogs subjected to acute coronary artery ligation. These drugs did not significantly change the ventricular fibrillation threshold nor haemodynamics before coronary artery ligation, except for remarkable haemodynamic depression by ranitidine 1 mg/kg. Ligation of the left anterior descending coronary artery reduced the ventricular fibrillation threshold, decreased systemic and left ventricular pressures and myocardial contractility, and slightly increased heart rate. Pretreatment with ranitidine 0.25 or 1 mg/kg, or with cimetidine 2 mg/kg, significantly abolished the reductions in ventricular fibrillation threshold, but did not noticeably alter the haemodynamic changes. These findings further support the hypothesis that histamine release may contribute to the increased ventricular vulnerability resulting from acute myocardial ischaemia. However, the role of histamine in the haemodynamic responses to coronary artery ligation remains obscure.
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18
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Dai S. Effects of ranitidine and cimetidine on experimentally induced ventricular arrhythmias in anaesthetized rats. AGENTS AND ACTIONS 1986; 17:460-5. [PMID: 3706050 DOI: 10.1007/bf01965514] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The effects of two histamine H2-receptor antagonists, ranitidine and cimetidine, on ventricular arrhythmias induced by acute coronary artery ligation and by aconitine infusion were studied in pentobarbitone-anaesthetized rats. The changes in arterial blood pressure and heart rate were also observed. It was found that both drugs significantly reduced the incidence, and prolonged the time of onset, of ventricular tachycardia and ventricular fibrillation following acute coronary artery ligation; however, they did not significantly alter the incidence or time of onset of ventricular dysrhythmias caused by aconitine infusion. These findings further support the hypothesis that histamine release may contribute to the genesis of early ventricular arrhythmias resulting from acute myocardial ischaemia. Since the decreased blood pressure induced by coronary artery ligation was not significantly prevented by pretreatment with either histamine H2-receptor blocker, this suggests that histamine may not be responsible for the blood pressure changes during acute myocardial ischaemia.
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19
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Rand MJ, Story DF, Wong-Dusting HK. Effect of histamine on the resting and stimulation-induced release of [3H]noradrenaline from rat isolated atria. J Pharm Pharmacol 1983; 35:126-8. [PMID: 6131984 DOI: 10.1111/j.2042-7158.1983.tb04287.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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20
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Lindemann JP, Besch HR, Watanabe AM. Indirect and direct effects of the divalent cation ionophore A23187 on guinea pig and rat ventricular myocardium. Circ Res 1979; 44:472-82. [PMID: 218747 DOI: 10.1161/01.res.44.4.472] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Lokhandwala MF. Pharmacological analysis of the tachycardia produced by histamine and specific H1-and H2-receptor agonists in anesthetized dogs. Eur J Pharmacol 1978; 51:351-9. [PMID: 30637 DOI: 10.1016/0014-2999(78)90427-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Characterization of an isolated, working guinea-pig heart including effects of histamine and noradrenaline. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/0160-5402(78)90048-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Bertaccini G. Histamine H2-receptors and gastric secretion. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1978; 106:69-74. [PMID: 31075 DOI: 10.1007/978-1-4684-7248-6_8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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