Negative Inotropic Effect of Rapamycin on Isolated Human Cardiomyocytes
Rapamycin is an increasingly important immunosuppressive drug and reduces restenosis after coronary stenting, but its effects on cardiac contractility are largely unknown. We investigated the acute inotropic effects of rapamycin on isolated human cardiomyocytes. Cardiomyocytes were enzymatically iso...
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| Veröffentlicht in: | Journal of international medical research 2008-07, Vol.36 (4), p.810-814 |
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| container_title | Journal of international medical research |
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| creator | Möllmann, H Nef, HM Kahlert, P Kostin, S Möllmann, S Weber, M Troidl, C Hamm, CW Holubarsch, CJF Elsässer, A |
| description | Rapamycin is an increasingly important immunosuppressive drug and reduces restenosis after coronary stenting, but its effects on cardiac contractility are largely unknown. We investigated the acute inotropic effects of rapamycin on isolated human cardiomyocytes. Cardiomyocytes were enzymatically isolated from right atrial appendages obtained during routine coronary artery bypass surgery. Cell morphology was examined by confocal microscopy. Cell contraction was recorded after electrical stimulation. Rapamycin elicited a concentration-dependent decrease in fractional cell shortening ranging from 14.3 ± 2.6% at 10−8 M rapamycin to 26.4 ± 4.2% at 10−5 M. Rapamycin also caused a concentration-dependent decrease in diastolic cell length. Contractile performance of isolated cardiomyocytes was well preserved, as evidenced by the profound positive inotropic effects of high extracellular calcium concentration and the β-adrenoreceptor agonist isoproterenol. The acute negative inotropic effect of rapamycin on human cardiomyocytes might be due to altered calcium homeostasis through the binding of rapamycin to FKBP12.6 and its regulatory function on the ryanodine receptor, with increased calcium leakage from the sarcoplasmic reticulum. |
| doi_str_mv | 10.1177/147323000803600424 |
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We investigated the acute inotropic effects of rapamycin on isolated human cardiomyocytes. Cardiomyocytes were enzymatically isolated from right atrial appendages obtained during routine coronary artery bypass surgery. Cell morphology was examined by confocal microscopy. Cell contraction was recorded after electrical stimulation. Rapamycin elicited a concentration-dependent decrease in fractional cell shortening ranging from 14.3 ± 2.6% at 10−8 M rapamycin to 26.4 ± 4.2% at 10−5 M. Rapamycin also caused a concentration-dependent decrease in diastolic cell length. Contractile performance of isolated cardiomyocytes was well preserved, as evidenced by the profound positive inotropic effects of high extracellular calcium concentration and the β-adrenoreceptor agonist isoproterenol. The acute negative inotropic effect of rapamycin on human cardiomyocytes might be due to altered calcium homeostasis through the binding of rapamycin to FKBP12.6 and its regulatory function on the ryanodine receptor, with increased calcium leakage from the sarcoplasmic reticulum.</description><identifier>ISSN: 0300-0605</identifier><identifier>EISSN: 1473-2300</identifier><identifier>DOI: 10.1177/147323000803600424</identifier><identifier>PMID: 18652778</identifier><language>eng</language><publisher>London, England: SAGE Publications</publisher><subject>Calcium - metabolism ; Cell Shape ; Cells, Cultured ; Dose-Response Relationship, Drug ; Humans ; Immunosuppressive Agents - pharmacology ; Myocardial Contraction - drug effects ; Myocardial Contraction - physiology ; Myocytes, Cardiac - cytology ; Myocytes, Cardiac - drug effects ; Myocytes, Cardiac - metabolism ; Sirolimus - pharmacology</subject><ispartof>Journal of international medical research, 2008-07, Vol.36 (4), p.810-814</ispartof><rights>2008 SAGE Publications</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c385t-d608f3cfec0f3b1ee0a7131521f568406e4d80aa4a8a648bdf9051a7ee67d3e73</citedby><cites>FETCH-LOGICAL-c385t-d608f3cfec0f3b1ee0a7131521f568406e4d80aa4a8a648bdf9051a7ee67d3e73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://journals.sagepub.com/doi/pdf/10.1177/147323000803600424$$EPDF$$P50$$Gsage$$H</linktopdf><linktohtml>$$Uhttps://journals.sagepub.com/doi/10.1177/147323000803600424$$EHTML$$P50$$Gsage$$H</linktohtml><link.rule.ids>314,776,780,21946,27832,27903,27904,44924,45312</link.rule.ids><linktorsrc>$$Uhttps://journals.sagepub.com/doi/full/10.1177/147323000803600424?utm_source=summon&utm_medium=discovery-provider$$EView_record_in_SAGE_Publications$$FView_record_in_$$GSAGE_Publications</linktorsrc><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18652778$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Möllmann, H</creatorcontrib><creatorcontrib>Nef, HM</creatorcontrib><creatorcontrib>Kahlert, P</creatorcontrib><creatorcontrib>Kostin, S</creatorcontrib><creatorcontrib>Möllmann, S</creatorcontrib><creatorcontrib>Weber, M</creatorcontrib><creatorcontrib>Troidl, C</creatorcontrib><creatorcontrib>Hamm, CW</creatorcontrib><creatorcontrib>Holubarsch, CJF</creatorcontrib><creatorcontrib>Elsässer, A</creatorcontrib><title>Negative Inotropic Effect of Rapamycin on Isolated Human Cardiomyocytes</title><title>Journal of international medical research</title><addtitle>J Int Med Res</addtitle><description>Rapamycin is an increasingly important immunosuppressive drug and reduces restenosis after coronary stenting, but its effects on cardiac contractility are largely unknown. We investigated the acute inotropic effects of rapamycin on isolated human cardiomyocytes. Cardiomyocytes were enzymatically isolated from right atrial appendages obtained during routine coronary artery bypass surgery. Cell morphology was examined by confocal microscopy. Cell contraction was recorded after electrical stimulation. Rapamycin elicited a concentration-dependent decrease in fractional cell shortening ranging from 14.3 ± 2.6% at 10−8 M rapamycin to 26.4 ± 4.2% at 10−5 M. Rapamycin also caused a concentration-dependent decrease in diastolic cell length. Contractile performance of isolated cardiomyocytes was well preserved, as evidenced by the profound positive inotropic effects of high extracellular calcium concentration and the β-adrenoreceptor agonist isoproterenol. The acute negative inotropic effect of rapamycin on human cardiomyocytes might be due to altered calcium homeostasis through the binding of rapamycin to FKBP12.6 and its regulatory function on the ryanodine receptor, with increased calcium leakage from the sarcoplasmic reticulum.</description><subject>Calcium - metabolism</subject><subject>Cell Shape</subject><subject>Cells, Cultured</subject><subject>Dose-Response Relationship, Drug</subject><subject>Humans</subject><subject>Immunosuppressive Agents - pharmacology</subject><subject>Myocardial Contraction - drug effects</subject><subject>Myocardial Contraction - physiology</subject><subject>Myocytes, Cardiac - cytology</subject><subject>Myocytes, Cardiac - drug effects</subject><subject>Myocytes, Cardiac - metabolism</subject><subject>Sirolimus - pharmacology</subject><issn>0300-0605</issn><issn>1473-2300</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kFFLwzAUhYMobk7_gA_SJ9_qbpo0yR5lzG0wFESfS5bejI62qUkr9N_bsoEPgk8HLt_54B5C7ik8USrlnHLJEgYACpgA4Am_INPxGI_XSzKFIWIQkE7ITQjHERFpck0mVA0ppZqS9SsedFt8Y7StXetdU5hoZS2aNnI2eteNrnpT1JGro21wpW4xjzZdpetoqX1euKp3pm8x3JIrq8uAd-eckc-X1cdyE-_e1tvl8y42TKVtnAtQlpnBD5btKSJoSRlNE2pToTgI5LkCrblWWnC1z-0CUqolopA5Q8lm5PHkbbz76jC0WVUEg2Wpa3RdyMSC8ZQniwFMTqDxLgSPNmt8UWnfZxSycb7s73xD6eFs7_YV5r-V814DMD8BQR8wO7rO18O3_yl_AFEQd2c</recordid><startdate>20080701</startdate><enddate>20080701</enddate><creator>Möllmann, H</creator><creator>Nef, HM</creator><creator>Kahlert, P</creator><creator>Kostin, S</creator><creator>Möllmann, S</creator><creator>Weber, M</creator><creator>Troidl, C</creator><creator>Hamm, CW</creator><creator>Holubarsch, CJF</creator><creator>Elsässer, A</creator><general>SAGE Publications</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></search><sort><creationdate>20080701</creationdate><title>Negative Inotropic Effect of Rapamycin on Isolated Human Cardiomyocytes</title><author>Möllmann, H ; Nef, HM ; Kahlert, P ; Kostin, S ; Möllmann, S ; Weber, M ; Troidl, C ; Hamm, CW ; Holubarsch, CJF ; Elsässer, A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-d608f3cfec0f3b1ee0a7131521f568406e4d80aa4a8a648bdf9051a7ee67d3e73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Calcium - metabolism</topic><topic>Cell Shape</topic><topic>Cells, Cultured</topic><topic>Dose-Response Relationship, Drug</topic><topic>Humans</topic><topic>Immunosuppressive Agents - pharmacology</topic><topic>Myocardial Contraction - drug effects</topic><topic>Myocardial Contraction - physiology</topic><topic>Myocytes, Cardiac - cytology</topic><topic>Myocytes, Cardiac - drug effects</topic><topic>Myocytes, Cardiac - metabolism</topic><topic>Sirolimus - pharmacology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Möllmann, H</creatorcontrib><creatorcontrib>Nef, HM</creatorcontrib><creatorcontrib>Kahlert, P</creatorcontrib><creatorcontrib>Kostin, S</creatorcontrib><creatorcontrib>Möllmann, S</creatorcontrib><creatorcontrib>Weber, M</creatorcontrib><creatorcontrib>Troidl, C</creatorcontrib><creatorcontrib>Hamm, CW</creatorcontrib><creatorcontrib>Holubarsch, CJF</creatorcontrib><creatorcontrib>Elsässer, A</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><jtitle>Journal of international medical research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Möllmann, H</au><au>Nef, HM</au><au>Kahlert, P</au><au>Kostin, S</au><au>Möllmann, S</au><au>Weber, M</au><au>Troidl, C</au><au>Hamm, CW</au><au>Holubarsch, CJF</au><au>Elsässer, A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Negative Inotropic Effect of Rapamycin on Isolated Human Cardiomyocytes</atitle><jtitle>Journal of international medical research</jtitle><addtitle>J Int Med Res</addtitle><date>2008-07-01</date><risdate>2008</risdate><volume>36</volume><issue>4</issue><spage>810</spage><epage>814</epage><pages>810-814</pages><issn>0300-0605</issn><eissn>1473-2300</eissn><abstract>Rapamycin is an increasingly important immunosuppressive drug and reduces restenosis after coronary stenting, but its effects on cardiac contractility are largely unknown. We investigated the acute inotropic effects of rapamycin on isolated human cardiomyocytes. Cardiomyocytes were enzymatically isolated from right atrial appendages obtained during routine coronary artery bypass surgery. Cell morphology was examined by confocal microscopy. Cell contraction was recorded after electrical stimulation. Rapamycin elicited a concentration-dependent decrease in fractional cell shortening ranging from 14.3 ± 2.6% at 10−8 M rapamycin to 26.4 ± 4.2% at 10−5 M. Rapamycin also caused a concentration-dependent decrease in diastolic cell length. Contractile performance of isolated cardiomyocytes was well preserved, as evidenced by the profound positive inotropic effects of high extracellular calcium concentration and the β-adrenoreceptor agonist isoproterenol. 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| subjects | Calcium - metabolism Cell Shape Cells, Cultured Dose-Response Relationship, Drug Humans Immunosuppressive Agents - pharmacology Myocardial Contraction - drug effects Myocardial Contraction - physiology Myocytes, Cardiac - cytology Myocytes, Cardiac - drug effects Myocytes, Cardiac - metabolism Sirolimus - pharmacology |
| title | Negative Inotropic Effect of Rapamycin on Isolated Human Cardiomyocytes |
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