dc.contributor.author | Pedersen, Tina Myhre | |
dc.contributor.author | Boardman, Neoma | |
dc.contributor.author | Hafstad, Anne Dragøy | |
dc.contributor.author | Aasum, Ellen | |
dc.date.accessioned | 2019-03-18T13:02:03Z | |
dc.date.available | 2019-03-18T13:02:03Z | |
dc.date.issued | 2018-10-01 | |
dc.description.abstract | Although murine models for studying the development of cardiac dysfunction in diabetes mellitus are well established, their reported cardiac phenotypes vary. These reported divergences may, in addition to the severity of different models, also be linked to the methods used for cardiac functional assessment. In the present study, we examined the functional changes using conventional transthoracic echocardiography (<i>in vivo</i>) and isolated heart perfusion techniques (<i>ex vivo</i>), in hearts from two mouse models; one with an overt type 2 diabetes (the <i>db/db</i> mouse) and one with a prediabetic state, where obesity was induced by a high-fat diet (HFD). Analysis of left ventricular function in the isolated working hearts from HFD-fed mice, suggested that these hearts develop diastolic dysfunction with preserved systolic function. Accordingly, <i>in vivo</i> examination demonstrated maintained systolic function, but we did not find parameters of diastolic function to be altered. In <i>db/db</i> mice, <i>ex vivo</i> working hearts showed both diastolic and systolic dysfunction. Although <i>in vivo</i> functional assessment revealed signs of diastolic dysfunction, the hearts did not display reduced systolic function. The contrasting results between <i>ex vivo</i> and <i>in vivo</i> function could be due to systemic changes that may sustain <i>in vivo</i> function, or a lack of sensitivity using conventional transthoracic echocardiography. Thus, this study demonstrates that the isolated perfused working heart preparation provides unique additional information related to the development of cardiomyopathy, which might otherwise go unnoticed when only using conventional echocardiographic assessment. | en_US |
dc.description.sponsorship | The Norwegian Council on Cardiovascular Disease
UiT - The Arctic University of Norway | en_US |
dc.description | Source at <a href=https://doi.org/10.1371/journal.pone.0204843>https://doi.org/10.1371/journal.pone.0204843. </a> | en_US |
dc.identifier.citation | Pedersen, T.M., Boardman, N.T., Hafstad, A.D. & Aasum, E. (2018). Isolated perfused working hearts provide valuable additional information during phenotypic assessment of the diabetic mouse heart. <i>PLoS ONE, 13</i>(10), e0204843. https://doi.org/10.1371/journal.pone.0204843 | en_US |
dc.identifier.cristinID | FRIDAID 1627437 | |
dc.identifier.doi | 10.1371/journal.pone.0204843 | |
dc.identifier.issn | 1932-6203 | |
dc.identifier.uri | https://hdl.handle.net/10037/15015 | |
dc.language.iso | eng | en_US |
dc.publisher | Public Library of Science | en_US |
dc.relation.ispartof | Pedersen, T.M. (2109). Cardiac remodelling in obesity- and angiotensin II-mediated heart failure: Morphological, functional and metabolic alterations (Doctoral thesis). <a href=https://hdl.handle.net/10037/31549>https://hdl.handle.net/10037/31549</a>. | |
dc.relation.journal | PLoS ONE | |
dc.rights.accessRights | openAccess | en_US |
dc.subject | VDP::Medical disciplines: 700::Basic medical, dental and veterinary science disciplines: 710 | en_US |
dc.subject | VDP::Medisinske Fag: 700::Basale medisinske, odontologiske og veterinærmedisinske fag: 710 | en_US |
dc.title | Isolated perfused working hearts provide valuable additional information during phenotypic assessment of the diabetic mouse heart | en_US |
dc.type | Journal article | en_US |
dc.type | Tidsskriftartikkel | en_US |
dc.type | Peer reviewed | en_US |