Eiringhaus, Jörg

[["dc.bibliographiccitation.firstpage","719"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Artificial Organs"],["dc.bibliographiccitation.lastpage","726"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Fischer, Thomas H."],["dc.contributor.author","Kleinwächter, Astrid"],["dc.contributor.author","Herting, Jonas"],["dc.contributor.author","Eiringhaus, Jörg"],["dc.contributor.author","Hartmann, Nico"],["dc.contributor.author","Renner, André"],["dc.contributor.author","Gummert, Jan"],["dc.contributor.author","Haverich, Axel"],["dc.contributor.author","Schmitto, Jan D."],["dc.contributor.author","Sossalla, Samuel"],["dc.date.accessioned","2018-11-07T10:10:45Z"],["dc.date.available","2018-11-07T10:10:45Z"],["dc.date.issued","2016"],["dc.description.abstract","In heart failure, left ventricular assist device (LVAD) implantation is performed to ensure sufficient cardiac output. Whereas some patients are subsequently weaned from LVAD support, other patients still need heart transplantation. To elucidate underlying mechanisms, we assessed the arrhythmogenic SR-Ca2+ leak at the time of LVAD implantation (HF-Im) and heart transplantation (HF-Tx) and evaluated the effects of CaMKII-inhibition. Human left-ventricular cardiomyocytes were isolated, paced at 1Hz for 10 beats to ensure SR-Ca2+ loading and scanned for diastolic Ca2+ sparks (confocal microscopy). In HF-Im, the high diastolic spark frequency (CaSpF) of 0.76 +/- 0.12x100m(-1)xs(-1) could be reduced to 0.48 +/- 0.10x100m(-1)xs(-1) by CaMKII inhibition (AIP, 1M). The amplitude of Ca2+ sparks, width, and length was not significantly altered. In sum, CaMKII inhibition yielded a clear tendency toward a reduction of the SR-Ca2+ leak (n cells/patients=76/6 vs. 108/6, P=0.08). In HF-Tx, we detected an even higher CaSpF of 1.00 +/- 0.10 100m(-1)xs(-1) and a higher SR-Ca2+ leak compared with HF-Im (increase by 81 +/- 33%, n cells/patients=156/7 vs. 130/7, P<0.05), which fits to the further decreased LV function. Here, CaMKII inhibition likewise reduced CaSpF (0.35 +/- 0.09 100m(-1)xs(-1,)P=0.06) and significantly reduced spark duration (n sparks/patients=58/3 vs. 159/3, P<0.05). Conclusively, the SR-Ca2+ leak was reduced by 69 +/- 12% in HF-Tx upon CaMKII inhibition (n cells/patients=53/3 vs. 91/3, P<0.05). These data show that the SR-Ca2+ leak correlates with the development of LV function after LVAD implantation and may represent an important pathomechanism. The fact that CaMKII inhibition reduces the SR-Ca2+ leak in HF-Tx suggests that CaMKII inhibition may be a promising option to beneficially influence clinical course after LVAD implantation."],["dc.identifier.doi","10.1111/aor.12677"],["dc.identifier.isi","000383514300005"],["dc.identifier.pmid","26816346"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39920"],["dc.identifier.url","https://sfb1002.med.uni-goettingen.de/production/literature/publications/136"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1002: Modulatorische Einheiten bei Herzinsuffizienz"],["dc.relation","SFB 1002 | A03: Bedeutung CaMKII-abhängiger Mechanismen für die Arrhythmogenese bei Herzinsuffizienz"],["dc.relation.issn","1525-1594"],["dc.relation.issn","0160-564X"],["dc.relation.workinggroup","RG Sossalla (Kardiovaskuläre experimentelle Elektrophysiologie und Bildgebung)"],["dc.relation.workinggroup","RG T. Fischer"],["dc.title","Inhibition of CaMKII Attenuates Progressing Disruption of Ca2+ Homeostasis Upon Left Ventricular Assist Device Implantation in Human Heart Failure"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Der Internist"],["dc.bibliographiccitation.volume","57"],["dc.contributor.author","Herting, J. Jonas"],["dc.contributor.author","Hartmann, Nico"],["dc.contributor.author","Eiringhaus, Joerg"],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","Sossalla, Samuel T."],["dc.contributor.author","Fischer, T."],["dc.date.accessioned","2018-11-07T10:15:51Z"],["dc.date.available","2018-11-07T10:15:51Z"],["dc.date.issued","2016"],["dc.format.extent","S20"],["dc.identifier.isi","000375417500035"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40900"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","New york"],["dc.relation.issn","1432-1289"],["dc.relation.issn","0020-9554"],["dc.title","Influence of Atrial Fibrillation on the electromechanical Coupling in human Ventricular Myocardium"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1292"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","European Journal of Heart Failure"],["dc.bibliographiccitation.lastpage","1300"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Fischer, Thomas H."],["dc.contributor.author","Eiringhaus, Jörg"],["dc.contributor.author","Dybkova, Nataliya"],["dc.contributor.author","Foerster, Anna"],["dc.contributor.author","Herting, Jonas"],["dc.contributor.author","Kleinwaechter, Astrid"],["dc.contributor.author","Ljubojevic, Senka"],["dc.contributor.author","Schmitto, Jan D."],["dc.contributor.author","Streckfuss-Boemeke, Katrin"],["dc.contributor.author","Renner, André"],["dc.contributor.author","Gummert, Jan"],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","Maier, Lars S."],["dc.contributor.author","Sossalla, Samuel"],["dc.date.accessioned","2017-09-07T11:45:23Z"],["dc.date.available","2017-09-07T11:45:23Z"],["dc.date.issued","2014"],["dc.description.abstract","AimsThe sarcoplasmic reticulum (SR) Ca2+ leak is an important pathomechanism in heart failure (HF). It has been suggested that Ca2+/calmodulin-dependent protein kinase II (CaMKII) is only relevant for the induction of the SR Ca2+ leak in non-ischaemic but not in ischaemic HF. Therefore, we investigated CaMKII and its targets as well as the functional effects of CaMKII inhibition in human ischaemic cardiomyopathy (ICM, n=37) and dilated cardiomyopathy (DCM, n=40). Methods and resultsWestern blots showed a significantly increased expression (by 549%) and autophosphorylation at Thr286 (by 129 +/- 29%, P<0.05 each) of CaMKII in HF compared with healthy myocardium. However, no significant difference could be detected in ICM compared with DCM as to the expression and autophosphorylation of CaMKII nor the phosphorylation of the target sites ryanodine receptor 2 (RyR2)-S2809, RyR2-S2815, and phospholamban-Thr17. Isolated human cardiomyocytes (CMs) of patients with DCM and ICM showed a similar frequency of diastolic Ca2+ sparks (confocal microscopy) as well as of major arrhythmic events (Ca2+ waves, spontaneous Ca2+ transients). Despite a slightly smaller size of Ca2+ sparks in DCM (P<0.01), the calculated SR Ca2+ leak [Ca2+ spark frequecy (CaSpF)xamplitudexwidthxduration] did not differ between CMs of ICM vs. DCM. Importantly, CaMKII inhibition by autocamide-2-related inhibitory peptide (AIP, 1 mu mol/L) reduced the SR Ca2+ leak by approximate to 80% in both aetiologies (P<0.05 each) and effectively decreased the ratio of arrhythmic cells (P<0.05). Conclusion

Functional and molecular measures of the SR Ca2+ leak are comparable in human ICM and DCM. CaMKII is equally responsible for the induction of the RyR2 leakiness' in both pathologies. Thus, CaMKII inhibition as a therapeutic measure may not be restricted to patients suffering from DCM but rather may be beneficial for the majority of HF patients."],["dc.identifier.doi","10.1002/ejhf.163"],["dc.identifier.gro","3142009"],["dc.identifier.isi","000345755200007"],["dc.identifier.pmid","25201344"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11676"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/3534"],["dc.identifier.url","https://sfb1002.med.uni-goettingen.de/production/literature/publications/15"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation","SFB 1002: Modulatorische Einheiten bei Herzinsuffizienz"],["dc.relation","SFB 1002 | A03: Bedeutung CaMKII-abhängiger Mechanismen für die Arrhythmogenese bei Herzinsuffizienz"],["dc.relation","SFB 1002 | D01: Erholung aus der Herzinsuffizienz – Einfluss von Fibrose und Transkriptionssignatur"],["dc.relation.eissn","1879-0844"],["dc.relation.issn","1388-9842"],["dc.relation.workinggroup","RG Hasenfuß (Transition zur Herzinsuffizienz)"],["dc.relation.workinggroup","RG L. Maier (Experimentelle Kardiologie)"],["dc.relation.workinggroup","RG Sossalla (Kardiovaskuläre experimentelle Elektrophysiologie und Bildgebung)"],["dc.relation.workinggroup","RG T. Fischer"],["dc.rights","CC BY-NC 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/3.0"],["dc.title","Ca2+/calmodulin-dependent protein kinase II equally induces sarcoplasmic reticulum Ca2+ leak in human ischaemic and dilated cardiomyopathy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","European Journal of Heart Failure"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Herting, J. Jonas"],["dc.contributor.author","Hartmann, Nico"],["dc.contributor.author","Eiringhaus, Joerg"],["dc.contributor.author","Pabel, Stefanie Corinna"],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","Sossalla, Samuel T."],["dc.contributor.author","Fischer, Thomas H."],["dc.date.accessioned","2018-11-07T10:14:46Z"],["dc.date.available","2018-11-07T10:14:46Z"],["dc.date.issued","2016"],["dc.format.extent","515"],["dc.identifier.isi","000377107504258"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40681"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.publisher.place","Hoboken"],["dc.relation.issn","1879-0844"],["dc.relation.issn","1388-9842"],["dc.title","Effects of atrial fibrillation on ventricular calcium cycling in human myocardium"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","European Heart Journal"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Eiringhaus, Joerg"],["dc.contributor.author","Fischer, Thomas H."],["dc.contributor.author","Herting, J. Jonas"],["dc.contributor.author","Schmitto, J."],["dc.contributor.author","Foerster, A."],["dc.contributor.author","Renner, Andre"],["dc.contributor.author","Gummert, J. F."],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","Maier, Lars. S."],["dc.contributor.author","Sossalla, Samuel T."],["dc.date.accessioned","2018-11-07T09:35:32Z"],["dc.date.available","2018-11-07T09:35:32Z"],["dc.date.issued","2014"],["dc.format.extent","328"],["dc.identifier.isi","000343001302012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32409"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.publisher.place","Oxford"],["dc.relation.eventlocation","Barcelona, SPAIN"],["dc.relation.issn","1522-9645"],["dc.relation.issn","0195-668X"],["dc.title","CaMKII equally triggers SR Ca2+leak in human ischemic and non-ischemic heart failure"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1673"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","European Journal of Heart Failure"],["dc.bibliographiccitation.lastpage","1685"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Fischer, Thomas H."],["dc.contributor.author","Eiringhaus, Jörg"],["dc.contributor.author","Dybkova, Nataliya"],["dc.contributor.author","Saadatmand, Alireza"],["dc.contributor.author","Pabel, Steffen"],["dc.contributor.author","Weber, Silvio"],["dc.contributor.author","Wang, Yansong"],["dc.contributor.author","Köhn, Maja"],["dc.contributor.author","Tirilomis, Theodor"],["dc.contributor.author","Ljubojevic, Senka"],["dc.contributor.author","Renner, André"],["dc.contributor.author","Gummert, Jan"],["dc.contributor.author","Maier, Lars S."],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","El-Armouche, Ali"],["dc.contributor.author","Sossalla, Samuel"],["dc.date.accessioned","2019-02-18T13:43:31Z"],["dc.date.available","2019-02-18T13:43:31Z"],["dc.date.issued","2018"],["dc.description.abstract","Background Disruption of Ca2+ homeostasis is a key pathomechanism in heart failure. CaMKII-dependent hyperphosphorylation of ryanodine receptors in the sarcoplasmic reticulum (SR) increases the arrhythmogenic SR Ca2+ leak and depletes SR Ca2+ stores. The contribution of conversely acting serine/threonine phosphatases [protein phosphatase 1 (PP1) and 2A (PP2A)] is largely unknown. Methods and results Human myocardium from three groups of patients was investigated: (i) healthy controls (non-failing, NF, n = 8), (ii) compensated hypertrophy (Hy, n = 16), and (iii) end-stage heart failure (HF, n = 52). Expression of PP1 was unchanged in Hy but greater in HF compared to NF while its endogenous inhibitor-1 (I-1) was markedly lower expressed in both compared to NF, suggesting increased total PP1 activity. In contrast, PP2A expression was lower in Hy and HF compared to NF. Ca2+ homeostasis was severely disturbed in HF compared to Hy signified by a higher SR Ca2+ leak, lower systolic Ca2+ transients as well as a decreased SR Ca2+ load. Inhibition of PP1/PP2A by okadaic acid increased SR Ca2+ load and systolic Ca2+ transients but severely aggravated diastolic SR Ca2+ leak and cellular arrhythmias in Hy. Conversely, selective activation of PP1 by a PP1-disrupting peptide (PDP3) in HF potently reduced SR Ca2+ leak as well as cellular arrhythmias and, importantly, did not compromise systolic Ca2+ release and SR Ca2+ load. Conclusion This study is the first to functionally investigate the role of PP1/PP2A for Ca2+ homeostasis in diseased human myocardium. Our data indicate that a modulation of phosphatase activity potently impacts Ca2+ cycling properties. An activation of PP1 counteracts increased kinase activity in heart failure and successfully seals the arrhythmogenic SR Ca2+ leak. It may thus represent a promising future antiarrhythmic therapeutic approach."],["dc.identifier.doi","10.1002/ejhf.1297"],["dc.identifier.pmid","30191648"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/57579"],["dc.identifier.url","https://sfb1002.med.uni-goettingen.de/production/literature/publications/232"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation","SFB 1002: Modulatorische Einheiten bei Herzinsuffizienz"],["dc.relation","SFB 1002 | A11: Absolute Arrhythmie bei Vorhofflimmern - ein neuer Mechanismus, der zu einer Störung von Ca2+-Homöostase und elektrischer Stabilität in der Transition zur Herzinsuffizienz führt"],["dc.relation.issn","1879-0844"],["dc.relation.workinggroup","RG El-Armouche"],["dc.relation.workinggroup","RG Hasenfuß (Transition zur Herzinsuffizienz)"],["dc.relation.workinggroup","RG L. Maier (Experimentelle Kardiologie)"],["dc.relation.workinggroup","RG Sossalla (Kardiovaskuläre experimentelle Elektrophysiologie und Bildgebung)"],["dc.relation.workinggroup","RG T. Fischer"],["dc.title","Activation of protein phosphatase 1 by a selective phosphatase disrupting peptide reduces sarcoplasmic reticulum Ca2+ leak in human heart failure"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","13"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Basic Research in Cardiology"],["dc.bibliographiccitation.volume","114"],["dc.contributor.author","Eiringhaus, Jörg"],["dc.contributor.author","Herting, Jonas"],["dc.contributor.author","Schatter, Felix"],["dc.contributor.author","Nikolaev, Viacheslav O."],["dc.contributor.author","Sprenger, Julia"],["dc.contributor.author","Wang, Yansong"],["dc.contributor.author","Köhn, Maja"],["dc.contributor.author","Zabel, Markus"],["dc.contributor.author","El-Armouche, Ali"],["dc.contributor.author","Hasenfuss, Gerd"],["dc.contributor.author","Sossalla, Samuel"],["dc.contributor.author","Fischer, Thomas H."],["dc.date.accessioned","2019-08-02T06:17:58Z"],["dc.date.available","2019-08-02T06:17:58Z"],["dc.date.issued","2019"],["dc.description.abstract","Increased late sodium current (late INa) is an important arrhythmogenic trigger in cardiac disease. It prolongs cardiac action potential and leads to an increased SR Ca2+ leak. This study investigates the contribution of Ca2+/Calmodulin-dependent kinase II (CaMKII), protein kinase A (PKA) and conversely acting protein phosphatases 1 and 2A (PP1, PP2A) to this subcellular crosstalk. Augmentation of late INa (ATX-II) in murine cardiomyocytes led to an increase of diastolic Ca2+ spark frequency and amplitudes of Ca2+ transients but did not affect SR Ca2+ load. Interestingly, inhibition of both, CaMKII and PKA, attenuated the late INa-dependent induction of the SR Ca2+ leak. PKA inhibition additionally reduced the amplitudes of systolic Ca2+ transients. FRET-measurements revealed increased levels of cAMP upon late INa augmentation, which could be prevented by simultaneous inhibition of Na+/Ca2+-exchanger (NCX) suggesting that PKA is activated by Ca2+-dependent cAMP-production. Whereas inhibition of PP2A showed no effect on late INa-dependent alterations of Ca2+ cycling, additional inhibition of PP1 further increased the SR Ca2+ leak. In line with this, selective activation of PP1 yielded a strong reduction of the late INa-induced SR Ca2+ leak and did not affect systolic Ca2+ release. This study indicates that phosphatase/kinase-balance is perturbed upon increased Na+ influx leading to disruption of ventricular Ca2+ cycling via CaMKII- and PKA-dependent pathways. Importantly, an activation of PP1 at RyR2 may represent a promising new toehold to counteract pathologically increased kinase activity."],["dc.identifier.doi","10.1007/s00395-019-0720-7"],["dc.identifier.pmid","30788598"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62260"],["dc.identifier.url","https://sfb1002.med.uni-goettingen.de/production/literature/publications/256"],["dc.language.iso","en"],["dc.relation","SFB 1002: Modulatorische Einheiten bei Herzinsuffizienz"],["dc.relation","SFB 1002 | A11: Absolute Arrhythmie bei Vorhofflimmern - ein neuer Mechanismus, der zu einer Störung von Ca2+-Homöostase und elektrischer Stabilität in der Transition zur Herzinsuffizienz führt"],["dc.relation.eissn","1435-1803"],["dc.relation.issn","0300-8428"],["dc.relation.issn","1435-1803"],["dc.relation.workinggroup","RG El-Armouche"],["dc.relation.workinggroup","RG Hasenfuß (Transition zur Herzinsuffizienz)"],["dc.relation.workinggroup","RG Nikolaev (Cardiovascular Research Center)"],["dc.relation.workinggroup","RG Sossalla (Kardiovaskuläre experimentelle Elektrophysiologie und Bildgebung)"],["dc.relation.workinggroup","RG T. Fischer"],["dc.title","Protein kinase/phosphatase balance mediates the effects of increased late sodium current on ventricular calcium cycling"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","European Heart Journal"],["dc.bibliographiccitation.volume","36"],["dc.contributor.author","Eiringhaus, Joerg"],["dc.contributor.author","Fischer, Thomas H."],["dc.contributor.author","Saadatmand, Ali Reza"],["dc.contributor.author","Singh, S."],["dc.contributor.author","Kohn, M."],["dc.contributor.author","Wang, Y."],["dc.contributor.author","Maier, Lars. S."],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","El-Armouche, Ali"],["dc.contributor.author","Sossalla, Samuel T."],["dc.date.accessioned","2018-11-07T09:53:30Z"],["dc.date.available","2018-11-07T09:53:30Z"],["dc.date.issued","2015"],["dc.format.extent","362"],["dc.identifier.isi","000361205103090"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36341"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.publisher.place","Oxford"],["dc.relation.eventlocation","London, ENGLAND"],["dc.relation.issn","1522-9645"],["dc.relation.issn","0195-668X"],["dc.title","Ca-homeostasis in human cardiac hypertrophy and end stage heart failure is directly impacted by modulations of protein phosphatase 1 and-2a activity"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2992"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","ESC Heart Failure"],["dc.bibliographiccitation.lastpage","3002"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Eiringhaus, Jörg"],["dc.contributor.author","Wünsche, Christoph M."],["dc.contributor.author","Tirilomis, Petros"],["dc.contributor.author","Herting, Jonas"],["dc.contributor.author","Bork, Nadja"],["dc.contributor.author","Nikolaev, Viacheslav O."],["dc.contributor.author","Hasenfuss, Gerd"],["dc.contributor.author","Sossalla, Samuel"],["dc.contributor.author","Fischer, Thomas H."],["dc.date.accessioned","2021-04-14T08:24:55Z"],["dc.date.available","2021-04-14T08:24:55Z"],["dc.date.issued","2020"],["dc.description.abstract","Abstract Aims Inhibition of neprilysin and angiotensin II receptor by sacubitril/valsartan (Val) (LCZ696) reduces mortality in heart failure (HF) patients compared with sole inhibition of renin–angiotensin system. Beneficial effects of increased natriuretic peptide levels upon neprilysin inhibition have been proposed, whereas direct effects of sacubitrilat (Sac) (LBQ657) on myocardial Ca2+ cycling remain elusive. Methods and results Confocal microscopy (Fluo‐4 AM) was used to investigate pro‐arrhythmogenic sarcoplasmic reticulum (SR) Ca2+ leak in freshly isolated murine and human ventricular cardiomyocytes (CMs) upon Sac (40 μmol/L)/Val (13 μmol/L) treatment. The concentrations of Sac and Val equalled plasma concentrations of LCZ696 treatment used in PARADIGM‐HF trial. Epifluorescence microscopy measurements (Fura‐2 AM) were performed to investigate effects on systolic Ca2+ release, SR Ca2+ load, and Ca2+‐transient kinetics in freshly isolated murine ventricular CMs. The impact of Sac on myocardial contractility was evaluated using in toto‐isolated, isometrically twitching ventricular trabeculae from human hearts with end‐stage HF. Under basal conditions, the combination of Sac/Val did not influence diastolic Ca2+‐spark frequency (CaSpF) nor pro‐arrhythmogenic SR Ca2 leak in isolated murine ventricular CMs (n CMs/hearts = 80/7 vs. 100/7, P = 0.91/0.99). In contrast, Sac/Val treatment reduced CaSpF by 35 ± 9% and SR Ca2+ leak by 45 ± 9% in CMs put under catecholaminergic stress (isoproterenol 30 nmol/L, n = 81/7 vs. 62/7, P \\u0026lt; 0.001 each). This could be attributed to Sac, as sole Sac treatment also reduced both parameters by similar degrees (reduction of CaSpF by 57 ± 7% and SR Ca2+ leak by 76 ± 5%; n = 101/4 vs. 108/4, P \\u0026lt; 0.01 each), whereas sole Val treatment did not. Systolic Ca2+ release, SR Ca2+ load, and Ca2+‐transient kinetics including SERCA activity (kSERCA) were not compromised by Sac in isolated murine CMs (n = 41/6 vs. 39/6). Importantly, the combination of Sac/Val and Sac alone also reduced diastolic CaSpF and SR Ca2+ leak (reduction by 74 ± 7%) in human left ventricular CMs from patients with end‐stage HF (n = 71/8 vs. 78/8, P \\u0026lt; 0.05 each). Myocardial contractility of human ventricular trabeculae was not acutely affected by Sac treatment as the developed force remained unchanged over a time course of 30 min (n trabeculae/hearts = 3/3 vs. 4/3). Conclusion This study demonstrates that neprilysin inhibitor Sac directly improves Ca2+ homeostasis in human end‐stage HF by reducing pro‐arrhythmogenic SR Ca2+ leak without acutely affecting systolic Ca2+ release and inotropy. These effects might contribute to the mortality benefits observed in the PARADIGM‐HF trial."],["dc.description.sponsorship","Novartis http://dx.doi.org/10.13039/100004336"],["dc.description.sponsorship","Marga und Walter Boll‐Stiftung http://dx.doi.org/10.13039/501100011566"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.identifier.doi","10.1002/ehf2.12918"],["dc.identifier.pmid","32710603"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17698"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81465"],["dc.identifier.url","https://sfb1002.med.uni-goettingen.de/production/literature/publications/363"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.notes.intern","Merged from goescholar"],["dc.relation","SFB 1002: Modulatorische Einheiten bei Herzinsuffizienz"],["dc.relation","SFB 1002 | A11: Absolute Arrhythmie bei Vorhofflimmern - ein neuer Mechanismus, der zu einer Störung von Ca2+-Homöostase und elektrischer Stabilität in der Transition zur Herzinsuffizienz führt"],["dc.relation.eissn","2055-5822"],["dc.relation.issn","2055-5822"],["dc.relation.workinggroup","RG Hasenfuß (Transition zur Herzinsuffizienz)"],["dc.relation.workinggroup","RG Nikolaev (Cardiovascular Research Center)"],["dc.relation.workinggroup","RG Sossalla (Kardiovaskuläre experimentelle Elektrophysiologie und Bildgebung)"],["dc.relation.workinggroup","RG T. Fischer"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Sacubitrilat reduces pro‐arrhythmogenic sarcoplasmic reticulum Ca 2+ leak in human ventricular cardiomyocytes of patients with end‐stage heart failure"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Der Internist"],["dc.bibliographiccitation.volume","57"],["dc.contributor.author","Eiringhaus, Joerg"],["dc.contributor.author","Herting, J. Jonas"],["dc.contributor.author","Schatter, F."],["dc.contributor.author","Koehn, M."],["dc.contributor.author","Hasenfuß, Gerd"],["dc.contributor.author","El-Armouche, Ali"],["dc.contributor.author","Sossalla, Samuel T."],["dc.contributor.author","Fischer, T."],["dc.date.accessioned","2018-11-07T10:15:50Z"],["dc.date.available","2018-11-07T10:15:50Z"],["dc.date.issued","2016"],["dc.format.extent","S60"],["dc.identifier.isi","000375417500119"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40897"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","New york"],["dc.relation.issn","1432-1289"],["dc.relation.issn","0020-9554"],["dc.title","Induction Mechanisms of SR-Calcium-Leaks through the late Sodium Current in ventricular Myocardium"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]