Fast-relaxing cardiomyocytes exert a dominant role in the relaxation behavior of heterogeneous myocardium

Substantial variation in relaxation rate exists among cardiomyocytes within small volumes of myocardium; however, it is unknown how this variability affects the overall relaxation mechanics of heart muscle. In this study, we sought to modulate levels of cellular heterogeneity in a computational mode...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Archives of biochemistry and biophysics 2021-01, Vol.697, p.108711-108711, Article 108711
Hauptverfasser: Clark, J. Alexander, Sewanan, Lorenzo R., Schwan, Jonas, Kluger, Jonathan, Campbell, Kenneth S., Campbell, Stuart G.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 108711
container_issue
container_start_page 108711
container_title Archives of biochemistry and biophysics
container_volume 697
creator Clark, J. Alexander
Sewanan, Lorenzo R.
Schwan, Jonas
Kluger, Jonathan
Campbell, Kenneth S.
Campbell, Stuart G.
description Substantial variation in relaxation rate exists among cardiomyocytes within small volumes of myocardium; however, it is unknown how this variability affects the overall relaxation mechanics of heart muscle. In this study, we sought to modulate levels of cellular heterogeneity in a computational model, then validate those predictions using an engineered heart tissue platform. We formulated an in silico tissue model composed of half-sarcomeres with varied relaxation rates, incorporating single-cell cardiomyocyte experimental data. These model tissues randomly sampled relaxation parameters from two offset distributions of fast- and slow-relaxing populations of half-sarcomeres. Isometric muscle twitch simulations predicted a complex relationship between relaxation time and the proportion of fast-versus slow-relaxing cells in heterogeneous tissues. Specifically, a 50/50 mixture of fast and slow cells did not lead to relaxation time that was the mean of the relaxation times associated with the two pure cases. Rather, the mean relaxation time was achieved at a ratio of 70:30 slow:fast relaxing cells, suggesting a disproportionate impact of fast-relaxing cells on overall tissue relaxation. To examine whether this behavior persists in vitro, we constructed engineered heart tissues from two lines of fast- and slow-relaxing human iPSC-derived cardiomyocytes. Cell tracking via fluorescent nanocrystals confirmed the presence of both cell populations in the 50/50 mixed tissues at the time of mechanical characterization. Isometric muscle twitch relaxation times of these mixed-population engineered heart tissues showed agreement with the predictions from the model, namely that the measured relaxation rate of 50/50 mixed tissues more closely resembled that of tissues made with 100% fast-relaxing cells. Our observations suggest that cardiomyocyte diversity can play an important role in determining tissue-level relaxation.
doi_str_mv 10.1016/j.abb.2020.108711
format Article
fullrecord <record><control><sourceid>proquest_pubme</sourceid><recordid>TN_cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_7785692</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0003986120307207</els_id><sourcerecordid>2467617446</sourcerecordid><originalsourceid>FETCH-LOGICAL-c451t-998d870b1668fb51243d1a6b9282118721100e99ad217a8427e9b66255736fef3</originalsourceid><addsrcrecordid>eNp9kU9vFCEYh0mjsWv1A_RiOHqZlZdhgImJiWmsmjTpRc-EYd7ZZTMDFdhN99t3plsbvfQCITy_hz8_Qi6BrYGB_LRb265bc8aXtVYAZ2QFrJUVq7V4RVaMsbpqtYRz8jbnHWMAQvI35Lyu-UwLvSL-2uZSJRztvQ8b6mzqfZyO0R0LZor3mAq1tI-TDzYUmuKI1AdatkgfQ7b4GGiHW3vwMdE40C0WTHGDAeM-00W1OPfTO_J6sGPG90_zBfl9_e3X1Y_q5vb7z6uvN5UTDZSqbXWvFetASj10DXBR92Bl13LNAbSaB8awbW3PQVktuMK2k5I3jarlgEN9Qb6cvHf7bsLeYSjJjuYu-cmmo4nWm_93gt-aTTwYpXQjWz4LPj4JUvyzx1zM5LPDcbSPTzJcSCVBCSFnFE6oSzHnhMPzMcDMUpHZmbkis1RkThXNmQ__3u858beTGfh8AnD-pYPHZLLzGBz2PqErpo_-Bf0DyiejCQ</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2467617446</pqid></control><display><type>article</type><title>Fast-relaxing cardiomyocytes exert a dominant role in the relaxation behavior of heterogeneous myocardium</title><source>MEDLINE</source><source>Access via ScienceDirect (Elsevier)</source><creator>Clark, J. Alexander ; Sewanan, Lorenzo R. ; Schwan, Jonas ; Kluger, Jonathan ; Campbell, Kenneth S. ; Campbell, Stuart G.</creator><creatorcontrib>Clark, J. Alexander ; Sewanan, Lorenzo R. ; Schwan, Jonas ; Kluger, Jonathan ; Campbell, Kenneth S. ; Campbell, Stuart G.</creatorcontrib><description>Substantial variation in relaxation rate exists among cardiomyocytes within small volumes of myocardium; however, it is unknown how this variability affects the overall relaxation mechanics of heart muscle. In this study, we sought to modulate levels of cellular heterogeneity in a computational model, then validate those predictions using an engineered heart tissue platform. We formulated an in silico tissue model composed of half-sarcomeres with varied relaxation rates, incorporating single-cell cardiomyocyte experimental data. These model tissues randomly sampled relaxation parameters from two offset distributions of fast- and slow-relaxing populations of half-sarcomeres. Isometric muscle twitch simulations predicted a complex relationship between relaxation time and the proportion of fast-versus slow-relaxing cells in heterogeneous tissues. Specifically, a 50/50 mixture of fast and slow cells did not lead to relaxation time that was the mean of the relaxation times associated with the two pure cases. Rather, the mean relaxation time was achieved at a ratio of 70:30 slow:fast relaxing cells, suggesting a disproportionate impact of fast-relaxing cells on overall tissue relaxation. To examine whether this behavior persists in vitro, we constructed engineered heart tissues from two lines of fast- and slow-relaxing human iPSC-derived cardiomyocytes. Cell tracking via fluorescent nanocrystals confirmed the presence of both cell populations in the 50/50 mixed tissues at the time of mechanical characterization. Isometric muscle twitch relaxation times of these mixed-population engineered heart tissues showed agreement with the predictions from the model, namely that the measured relaxation rate of 50/50 mixed tissues more closely resembled that of tissues made with 100% fast-relaxing cells. Our observations suggest that cardiomyocyte diversity can play an important role in determining tissue-level relaxation.</description><identifier>ISSN: 0003-9861</identifier><identifier>EISSN: 1096-0384</identifier><identifier>DOI: 10.1016/j.abb.2020.108711</identifier><identifier>PMID: 33271148</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Kinetics ; Models, Cardiovascular ; Muscle Relaxation ; Myocytes, Cardiac - cytology ; Myocytes, Cardiac - metabolism ; Tissue Engineering</subject><ispartof>Archives of biochemistry and biophysics, 2021-01, Vol.697, p.108711-108711, Article 108711</ispartof><rights>2020 Elsevier Inc.</rights><rights>Copyright © 2020 Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c451t-998d870b1668fb51243d1a6b9282118721100e99ad217a8427e9b66255736fef3</citedby><cites>FETCH-LOGICAL-c451t-998d870b1668fb51243d1a6b9282118721100e99ad217a8427e9b66255736fef3</cites><orcidid>0000-0002-1527-0770 ; 0000-0002-7738-0473 ; 0000-0003-2629-1865 ; 0000-0002-1305-7271</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.abb.2020.108711$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33271148$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Clark, J. Alexander</creatorcontrib><creatorcontrib>Sewanan, Lorenzo R.</creatorcontrib><creatorcontrib>Schwan, Jonas</creatorcontrib><creatorcontrib>Kluger, Jonathan</creatorcontrib><creatorcontrib>Campbell, Kenneth S.</creatorcontrib><creatorcontrib>Campbell, Stuart G.</creatorcontrib><title>Fast-relaxing cardiomyocytes exert a dominant role in the relaxation behavior of heterogeneous myocardium</title><title>Archives of biochemistry and biophysics</title><addtitle>Arch Biochem Biophys</addtitle><description>Substantial variation in relaxation rate exists among cardiomyocytes within small volumes of myocardium; however, it is unknown how this variability affects the overall relaxation mechanics of heart muscle. In this study, we sought to modulate levels of cellular heterogeneity in a computational model, then validate those predictions using an engineered heart tissue platform. We formulated an in silico tissue model composed of half-sarcomeres with varied relaxation rates, incorporating single-cell cardiomyocyte experimental data. These model tissues randomly sampled relaxation parameters from two offset distributions of fast- and slow-relaxing populations of half-sarcomeres. Isometric muscle twitch simulations predicted a complex relationship between relaxation time and the proportion of fast-versus slow-relaxing cells in heterogeneous tissues. Specifically, a 50/50 mixture of fast and slow cells did not lead to relaxation time that was the mean of the relaxation times associated with the two pure cases. Rather, the mean relaxation time was achieved at a ratio of 70:30 slow:fast relaxing cells, suggesting a disproportionate impact of fast-relaxing cells on overall tissue relaxation. To examine whether this behavior persists in vitro, we constructed engineered heart tissues from two lines of fast- and slow-relaxing human iPSC-derived cardiomyocytes. Cell tracking via fluorescent nanocrystals confirmed the presence of both cell populations in the 50/50 mixed tissues at the time of mechanical characterization. Isometric muscle twitch relaxation times of these mixed-population engineered heart tissues showed agreement with the predictions from the model, namely that the measured relaxation rate of 50/50 mixed tissues more closely resembled that of tissues made with 100% fast-relaxing cells. Our observations suggest that cardiomyocyte diversity can play an important role in determining tissue-level relaxation.</description><subject>Kinetics</subject><subject>Models, Cardiovascular</subject><subject>Muscle Relaxation</subject><subject>Myocytes, Cardiac - cytology</subject><subject>Myocytes, Cardiac - metabolism</subject><subject>Tissue Engineering</subject><issn>0003-9861</issn><issn>1096-0384</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kU9vFCEYh0mjsWv1A_RiOHqZlZdhgImJiWmsmjTpRc-EYd7ZZTMDFdhN99t3plsbvfQCITy_hz8_Qi6BrYGB_LRb265bc8aXtVYAZ2QFrJUVq7V4RVaMsbpqtYRz8jbnHWMAQvI35Lyu-UwLvSL-2uZSJRztvQ8b6mzqfZyO0R0LZor3mAq1tI-TDzYUmuKI1AdatkgfQ7b4GGiHW3vwMdE40C0WTHGDAeM-00W1OPfTO_J6sGPG90_zBfl9_e3X1Y_q5vb7z6uvN5UTDZSqbXWvFetASj10DXBR92Bl13LNAbSaB8awbW3PQVktuMK2k5I3jarlgEN9Qb6cvHf7bsLeYSjJjuYu-cmmo4nWm_93gt-aTTwYpXQjWz4LPj4JUvyzx1zM5LPDcbSPTzJcSCVBCSFnFE6oSzHnhMPzMcDMUpHZmbkis1RkThXNmQ__3u858beTGfh8AnD-pYPHZLLzGBz2PqErpo_-Bf0DyiejCQ</recordid><startdate>20210115</startdate><enddate>20210115</enddate><creator>Clark, J. Alexander</creator><creator>Sewanan, Lorenzo R.</creator><creator>Schwan, Jonas</creator><creator>Kluger, Jonathan</creator><creator>Campbell, Kenneth S.</creator><creator>Campbell, Stuart G.</creator><general>Elsevier Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-1527-0770</orcidid><orcidid>https://orcid.org/0000-0002-7738-0473</orcidid><orcidid>https://orcid.org/0000-0003-2629-1865</orcidid><orcidid>https://orcid.org/0000-0002-1305-7271</orcidid></search><sort><creationdate>20210115</creationdate><title>Fast-relaxing cardiomyocytes exert a dominant role in the relaxation behavior of heterogeneous myocardium</title><author>Clark, J. Alexander ; Sewanan, Lorenzo R. ; Schwan, Jonas ; Kluger, Jonathan ; Campbell, Kenneth S. ; Campbell, Stuart G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c451t-998d870b1668fb51243d1a6b9282118721100e99ad217a8427e9b66255736fef3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Kinetics</topic><topic>Models, Cardiovascular</topic><topic>Muscle Relaxation</topic><topic>Myocytes, Cardiac - cytology</topic><topic>Myocytes, Cardiac - metabolism</topic><topic>Tissue Engineering</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Clark, J. Alexander</creatorcontrib><creatorcontrib>Sewanan, Lorenzo R.</creatorcontrib><creatorcontrib>Schwan, Jonas</creatorcontrib><creatorcontrib>Kluger, Jonathan</creatorcontrib><creatorcontrib>Campbell, Kenneth S.</creatorcontrib><creatorcontrib>Campbell, Stuart G.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Archives of biochemistry and biophysics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Clark, J. Alexander</au><au>Sewanan, Lorenzo R.</au><au>Schwan, Jonas</au><au>Kluger, Jonathan</au><au>Campbell, Kenneth S.</au><au>Campbell, Stuart G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fast-relaxing cardiomyocytes exert a dominant role in the relaxation behavior of heterogeneous myocardium</atitle><jtitle>Archives of biochemistry and biophysics</jtitle><addtitle>Arch Biochem Biophys</addtitle><date>2021-01-15</date><risdate>2021</risdate><volume>697</volume><spage>108711</spage><epage>108711</epage><pages>108711-108711</pages><artnum>108711</artnum><issn>0003-9861</issn><eissn>1096-0384</eissn><abstract>Substantial variation in relaxation rate exists among cardiomyocytes within small volumes of myocardium; however, it is unknown how this variability affects the overall relaxation mechanics of heart muscle. In this study, we sought to modulate levels of cellular heterogeneity in a computational model, then validate those predictions using an engineered heart tissue platform. We formulated an in silico tissue model composed of half-sarcomeres with varied relaxation rates, incorporating single-cell cardiomyocyte experimental data. These model tissues randomly sampled relaxation parameters from two offset distributions of fast- and slow-relaxing populations of half-sarcomeres. Isometric muscle twitch simulations predicted a complex relationship between relaxation time and the proportion of fast-versus slow-relaxing cells in heterogeneous tissues. Specifically, a 50/50 mixture of fast and slow cells did not lead to relaxation time that was the mean of the relaxation times associated with the two pure cases. Rather, the mean relaxation time was achieved at a ratio of 70:30 slow:fast relaxing cells, suggesting a disproportionate impact of fast-relaxing cells on overall tissue relaxation. To examine whether this behavior persists in vitro, we constructed engineered heart tissues from two lines of fast- and slow-relaxing human iPSC-derived cardiomyocytes. Cell tracking via fluorescent nanocrystals confirmed the presence of both cell populations in the 50/50 mixed tissues at the time of mechanical characterization. Isometric muscle twitch relaxation times of these mixed-population engineered heart tissues showed agreement with the predictions from the model, namely that the measured relaxation rate of 50/50 mixed tissues more closely resembled that of tissues made with 100% fast-relaxing cells. Our observations suggest that cardiomyocyte diversity can play an important role in determining tissue-level relaxation.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>33271148</pmid><doi>10.1016/j.abb.2020.108711</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0002-1527-0770</orcidid><orcidid>https://orcid.org/0000-0002-7738-0473</orcidid><orcidid>https://orcid.org/0000-0003-2629-1865</orcidid><orcidid>https://orcid.org/0000-0002-1305-7271</orcidid><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 0003-9861
ispartof Archives of biochemistry and biophysics, 2021-01, Vol.697, p.108711-108711, Article 108711
issn 0003-9861
1096-0384
language eng
recordid cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_7785692
source MEDLINE; Access via ScienceDirect (Elsevier)
subjects Kinetics
Models, Cardiovascular
Muscle Relaxation
Myocytes, Cardiac - cytology
Myocytes, Cardiac - metabolism
Tissue Engineering
title Fast-relaxing cardiomyocytes exert a dominant role in the relaxation behavior of heterogeneous myocardium
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T19%3A50%3A42IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_pubme&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Fast-relaxing%20cardiomyocytes%20exert%20a%20dominant%20role%20in%20the%20relaxation%20behavior%20of%20heterogeneous%20myocardium&rft.jtitle=Archives%20of%20biochemistry%20and%20biophysics&rft.au=Clark,%20J.%20Alexander&rft.date=2021-01-15&rft.volume=697&rft.spage=108711&rft.epage=108711&rft.pages=108711-108711&rft.artnum=108711&rft.issn=0003-9861&rft.eissn=1096-0384&rft_id=info:doi/10.1016/j.abb.2020.108711&rft_dat=%3Cproquest_pubme%3E2467617446%3C/proquest_pubme%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2467617446&rft_id=info:pmid/33271148&rft_els_id=S0003986120307207&rfr_iscdi=true