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Externalization of endogenous annexin A5 participates in apoptosis of rat cardiomyocytes
Annexins are Ca(2+)-dependent phospholipid binding proteins. Externalized annexin A5 has been recently suggested to have a proapoptotic effect. Our aim was to determine whether annexin A5, which is intracellular in cardiomyocytes, could be translocated and/or externalized and play a role during the...
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| Published in: | Cardiovascular research 2004-12, Vol.64 (3), p.496-506 |
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| container_title | Cardiovascular research |
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| creator | MONCEAU, Virginie BELIKOVA, Yulia KRATASSIOUK, Gueorgui CHARUE, Dominique CAMORS, Emmanuel COMMUNAL, Catherine TROUVE, Pascal RUSSO-MARIE, Francoise CHARLEMAGNE, Danièle |
| description | Annexins are Ca(2+)-dependent phospholipid binding proteins. Externalized annexin A5 has been recently suggested to have a proapoptotic effect. Our aim was to determine whether annexin A5, which is intracellular in cardiomyocytes, could be translocated and/or externalized and play a role during the apoptotic process.
Apoptosis was induced in rat cardiomyocytes by continuous incubation with staurosporine or 30 min treatment with H(2)O(2) and was measured by phosphatidylserine (PS) externalization, TUNEL staining and DNA ladder. Immunofluorescence labeling of annexin A5 was performed on permeabilized or nonpermeabilized cardiomyocytes.
Staurosporine or H(2)O(2) treatment of neonatal cardiomyocytes resulted in significant increases of apoptosis at 24 h, but H(2)O(2) treatment led to a faster and higher PS externalization than that observed with ST. In both neonatal and adult cardiomyocytes, annexin A5 was intracellular in control conditions but was found at the external face of sarcolemma during apoptosis. Furthermore, neonatal cardiomyocytes with externalized annexin A5 have apoptotic characteristics and their number increased with time. Interestingly, immediately after H(2)O(2) induction, the number of annexin A5-positive cells was higher than that of PS-positive cells (p |
| doi_str_mv | 10.1016/j.cardiores.2004.08.003 |
| format | article |
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Apoptosis was induced in rat cardiomyocytes by continuous incubation with staurosporine or 30 min treatment with H(2)O(2) and was measured by phosphatidylserine (PS) externalization, TUNEL staining and DNA ladder. Immunofluorescence labeling of annexin A5 was performed on permeabilized or nonpermeabilized cardiomyocytes.
Staurosporine or H(2)O(2) treatment of neonatal cardiomyocytes resulted in significant increases of apoptosis at 24 h, but H(2)O(2) treatment led to a faster and higher PS externalization than that observed with ST. In both neonatal and adult cardiomyocytes, annexin A5 was intracellular in control conditions but was found at the external face of sarcolemma during apoptosis. Furthermore, neonatal cardiomyocytes with externalized annexin A5 have apoptotic characteristics and their number increased with time. Interestingly, immediately after H(2)O(2) induction, the number of annexin A5-positive cells was higher than that of PS-positive cells (p</=0.05) and colabeling showed that half annexin A5-positive cells were PS-negative. We further demonstrated by immunoblots that free annexin A5 was absent from the media and could not be released from cardiomyocytes by washes at 1.8 mM Ca(2+). Removing annexin A5 by Ca(2+)-free washes 15 or 30 min after H(2)O(2) treatment or blocking externalized annexin A5 by antibodies lead to a significant decrease of apoptotic cardiomyocytes, cytochrome c release and caspase 3 activity.
This study indicated for the first time that annexin A5 was externalized at a very early stage of apoptosis and could have a proapoptotic effect in cardiomyocytes.</description><identifier>ISSN: 0008-6363</identifier><identifier>EISSN: 1755-3245</identifier><identifier>DOI: 10.1016/j.cardiores.2004.08.003</identifier><identifier>PMID: 15537503</identifier><identifier>CODEN: CVREAU</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>Animals ; Annexin A5 - analysis ; Annexin A5 - immunology ; Annexin A5 - metabolism ; Antibodies, Monoclonal - pharmacology ; Apoptosis ; Biological and medical sciences ; Cardiology. Vascular system ; Caspase 3 ; Caspases - metabolism ; Cells, Cultured ; Cytochromes c - metabolism ; Enzyme Inhibitors - pharmacology ; Hydrogen Peroxide - pharmacology ; In Situ Nick-End Labeling ; Medical sciences ; Microscopy, Confocal ; Myocytes, Cardiac - metabolism ; Myocytes, Cardiac - pathology ; Protein Kinase C - antagonists & inhibitors ; Rats ; Rats, Wistar ; Sarcolemma - metabolism ; Staurosporine - pharmacology</subject><ispartof>Cardiovascular research, 2004-12, Vol.64 (3), p.496-506</ispartof><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c388t-f3eac65f6f104948f1b4850fb493da43801ad6594ae0f379fa5ad0466c4ed963</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16262696$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15537503$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>MONCEAU, Virginie</creatorcontrib><creatorcontrib>BELIKOVA, Yulia</creatorcontrib><creatorcontrib>KRATASSIOUK, Gueorgui</creatorcontrib><creatorcontrib>CHARUE, Dominique</creatorcontrib><creatorcontrib>CAMORS, Emmanuel</creatorcontrib><creatorcontrib>COMMUNAL, Catherine</creatorcontrib><creatorcontrib>TROUVE, Pascal</creatorcontrib><creatorcontrib>RUSSO-MARIE, Francoise</creatorcontrib><creatorcontrib>CHARLEMAGNE, Danièle</creatorcontrib><title>Externalization of endogenous annexin A5 participates in apoptosis of rat cardiomyocytes</title><title>Cardiovascular research</title><addtitle>Cardiovasc Res</addtitle><description>Annexins are Ca(2+)-dependent phospholipid binding proteins. Externalized annexin A5 has been recently suggested to have a proapoptotic effect. Our aim was to determine whether annexin A5, which is intracellular in cardiomyocytes, could be translocated and/or externalized and play a role during the apoptotic process.
Apoptosis was induced in rat cardiomyocytes by continuous incubation with staurosporine or 30 min treatment with H(2)O(2) and was measured by phosphatidylserine (PS) externalization, TUNEL staining and DNA ladder. Immunofluorescence labeling of annexin A5 was performed on permeabilized or nonpermeabilized cardiomyocytes.
Staurosporine or H(2)O(2) treatment of neonatal cardiomyocytes resulted in significant increases of apoptosis at 24 h, but H(2)O(2) treatment led to a faster and higher PS externalization than that observed with ST. In both neonatal and adult cardiomyocytes, annexin A5 was intracellular in control conditions but was found at the external face of sarcolemma during apoptosis. Furthermore, neonatal cardiomyocytes with externalized annexin A5 have apoptotic characteristics and their number increased with time. Interestingly, immediately after H(2)O(2) induction, the number of annexin A5-positive cells was higher than that of PS-positive cells (p</=0.05) and colabeling showed that half annexin A5-positive cells were PS-negative. We further demonstrated by immunoblots that free annexin A5 was absent from the media and could not be released from cardiomyocytes by washes at 1.8 mM Ca(2+). Removing annexin A5 by Ca(2+)-free washes 15 or 30 min after H(2)O(2) treatment or blocking externalized annexin A5 by antibodies lead to a significant decrease of apoptotic cardiomyocytes, cytochrome c release and caspase 3 activity.
This study indicated for the first time that annexin A5 was externalized at a very early stage of apoptosis and could have a proapoptotic effect in cardiomyocytes.</description><subject>Animals</subject><subject>Annexin A5 - analysis</subject><subject>Annexin A5 - immunology</subject><subject>Annexin A5 - metabolism</subject><subject>Antibodies, Monoclonal - pharmacology</subject><subject>Apoptosis</subject><subject>Biological and medical sciences</subject><subject>Cardiology. Vascular system</subject><subject>Caspase 3</subject><subject>Caspases - metabolism</subject><subject>Cells, Cultured</subject><subject>Cytochromes c - metabolism</subject><subject>Enzyme Inhibitors - pharmacology</subject><subject>Hydrogen Peroxide - pharmacology</subject><subject>In Situ Nick-End Labeling</subject><subject>Medical sciences</subject><subject>Microscopy, Confocal</subject><subject>Myocytes, Cardiac - metabolism</subject><subject>Myocytes, Cardiac - pathology</subject><subject>Protein Kinase C - antagonists & inhibitors</subject><subject>Rats</subject><subject>Rats, Wistar</subject><subject>Sarcolemma - metabolism</subject><subject>Staurosporine - pharmacology</subject><issn>0008-6363</issn><issn>1755-3245</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNpFkE1LAzEQhoMoWj_-gu5Fb7tOmo_dPRbxCwpePHgL02wiKdtkTbbQ-utNabHkEDI8b2bmIeSOQkWBysdlpTF2LkSTqikAr6CpANgJmdBaiJJNuTglEwBoSskkuyCXKS3zU4ian5MLKgSrBbAJ-XrejCZ67N0vji74ItjC-C58Gx_WqUDvzcb5YiaKAePotBtwNKnIJRzCMIbk0i4ScSz2E622QW8zck3OLPbJ3BzuK_L58vz59FbOP17fn2bzUrOmGUvLDGoprLQUeMsbSxe8EWAXvGUdctYAxU6KlqMBy-rWosAOuJSam66V7Io87L8dYvhZmzSqlUva9D16kxdQsgYpORcZrPegjiGlaKwaolth3CoKaudULdW_U7VzqqBR2WlO3h5arBcr0x1zB4kZuD8AmDT2NqLXLh05Oc0nz_oHc-2Ecw</recordid><startdate>20041201</startdate><enddate>20041201</enddate><creator>MONCEAU, Virginie</creator><creator>BELIKOVA, Yulia</creator><creator>KRATASSIOUK, Gueorgui</creator><creator>CHARUE, Dominique</creator><creator>CAMORS, Emmanuel</creator><creator>COMMUNAL, Catherine</creator><creator>TROUVE, Pascal</creator><creator>RUSSO-MARIE, Francoise</creator><creator>CHARLEMAGNE, Danièle</creator><general>Oxford University Press</general><scope>IQODW</scope><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>20041201</creationdate><title>Externalization of endogenous annexin A5 participates in apoptosis of rat cardiomyocytes</title><author>MONCEAU, Virginie ; BELIKOVA, Yulia ; KRATASSIOUK, Gueorgui ; CHARUE, Dominique ; CAMORS, Emmanuel ; COMMUNAL, Catherine ; TROUVE, Pascal ; RUSSO-MARIE, Francoise ; CHARLEMAGNE, Danièle</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c388t-f3eac65f6f104948f1b4850fb493da43801ad6594ae0f379fa5ad0466c4ed963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Animals</topic><topic>Annexin A5 - analysis</topic><topic>Annexin A5 - immunology</topic><topic>Annexin A5 - metabolism</topic><topic>Antibodies, Monoclonal - pharmacology</topic><topic>Apoptosis</topic><topic>Biological and medical sciences</topic><topic>Cardiology. Vascular system</topic><topic>Caspase 3</topic><topic>Caspases - metabolism</topic><topic>Cells, Cultured</topic><topic>Cytochromes c - metabolism</topic><topic>Enzyme Inhibitors - pharmacology</topic><topic>Hydrogen Peroxide - pharmacology</topic><topic>In Situ Nick-End Labeling</topic><topic>Medical sciences</topic><topic>Microscopy, Confocal</topic><topic>Myocytes, Cardiac - metabolism</topic><topic>Myocytes, Cardiac - pathology</topic><topic>Protein Kinase C - antagonists & inhibitors</topic><topic>Rats</topic><topic>Rats, Wistar</topic><topic>Sarcolemma - metabolism</topic><topic>Staurosporine - pharmacology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MONCEAU, Virginie</creatorcontrib><creatorcontrib>BELIKOVA, Yulia</creatorcontrib><creatorcontrib>KRATASSIOUK, Gueorgui</creatorcontrib><creatorcontrib>CHARUE, Dominique</creatorcontrib><creatorcontrib>CAMORS, Emmanuel</creatorcontrib><creatorcontrib>COMMUNAL, Catherine</creatorcontrib><creatorcontrib>TROUVE, Pascal</creatorcontrib><creatorcontrib>RUSSO-MARIE, Francoise</creatorcontrib><creatorcontrib>CHARLEMAGNE, Danièle</creatorcontrib><collection>Pascal-Francis</collection><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>Cardiovascular research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MONCEAU, Virginie</au><au>BELIKOVA, Yulia</au><au>KRATASSIOUK, Gueorgui</au><au>CHARUE, Dominique</au><au>CAMORS, Emmanuel</au><au>COMMUNAL, Catherine</au><au>TROUVE, Pascal</au><au>RUSSO-MARIE, Francoise</au><au>CHARLEMAGNE, Danièle</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Externalization of endogenous annexin A5 participates in apoptosis of rat cardiomyocytes</atitle><jtitle>Cardiovascular research</jtitle><addtitle>Cardiovasc Res</addtitle><date>2004-12-01</date><risdate>2004</risdate><volume>64</volume><issue>3</issue><spage>496</spage><epage>506</epage><pages>496-506</pages><issn>0008-6363</issn><eissn>1755-3245</eissn><coden>CVREAU</coden><abstract>Annexins are Ca(2+)-dependent phospholipid binding proteins. Externalized annexin A5 has been recently suggested to have a proapoptotic effect. Our aim was to determine whether annexin A5, which is intracellular in cardiomyocytes, could be translocated and/or externalized and play a role during the apoptotic process.
Apoptosis was induced in rat cardiomyocytes by continuous incubation with staurosporine or 30 min treatment with H(2)O(2) and was measured by phosphatidylserine (PS) externalization, TUNEL staining and DNA ladder. Immunofluorescence labeling of annexin A5 was performed on permeabilized or nonpermeabilized cardiomyocytes.
Staurosporine or H(2)O(2) treatment of neonatal cardiomyocytes resulted in significant increases of apoptosis at 24 h, but H(2)O(2) treatment led to a faster and higher PS externalization than that observed with ST. In both neonatal and adult cardiomyocytes, annexin A5 was intracellular in control conditions but was found at the external face of sarcolemma during apoptosis. Furthermore, neonatal cardiomyocytes with externalized annexin A5 have apoptotic characteristics and their number increased with time. Interestingly, immediately after H(2)O(2) induction, the number of annexin A5-positive cells was higher than that of PS-positive cells (p</=0.05) and colabeling showed that half annexin A5-positive cells were PS-negative. We further demonstrated by immunoblots that free annexin A5 was absent from the media and could not be released from cardiomyocytes by washes at 1.8 mM Ca(2+). Removing annexin A5 by Ca(2+)-free washes 15 or 30 min after H(2)O(2) treatment or blocking externalized annexin A5 by antibodies lead to a significant decrease of apoptotic cardiomyocytes, cytochrome c release and caspase 3 activity.
This study indicated for the first time that annexin A5 was externalized at a very early stage of apoptosis and could have a proapoptotic effect in cardiomyocytes.</abstract><cop>Oxford</cop><pub>Oxford University Press</pub><pmid>15537503</pmid><doi>10.1016/j.cardiores.2004.08.003</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Cardiovascular research, 2004-12, Vol.64 (3), p.496-506 |
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| subjects | Animals Annexin A5 - analysis Annexin A5 - immunology Annexin A5 - metabolism Antibodies, Monoclonal - pharmacology Apoptosis Biological and medical sciences Cardiology. Vascular system Caspase 3 Caspases - metabolism Cells, Cultured Cytochromes c - metabolism Enzyme Inhibitors - pharmacology Hydrogen Peroxide - pharmacology In Situ Nick-End Labeling Medical sciences Microscopy, Confocal Myocytes, Cardiac - metabolism Myocytes, Cardiac - pathology Protein Kinase C - antagonists & inhibitors Rats Rats, Wistar Sarcolemma - metabolism Staurosporine - pharmacology |
| title | Externalization of endogenous annexin A5 participates in apoptosis of rat cardiomyocytes |
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