{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T20:00:52Z","timestamp":1792526452867,"version":"4.5.0"},"reference-count":38,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"11","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation Research"],"published-print":{"date-parts":[[2022,5,27]]},"abstract":"<jats:sec>\n            <jats:title>Background:<\/jats:title>\n            <jats:p>\n              Macrophages play an important role in cardiac repair after myocardial infarction (MI). In addition to the resident macrophages and blood-derived monocytes, Gata6\n              <jats:sup>+<\/jats:sup>\n              cavity macrophages located in the pericardial space were recently reported to relocate to the injured myocardium and prevent cardiac fibrosis. However, there is no direct genetic evidence to support it.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods:<\/jats:title>\n            <jats:p>\n              We used dual recombinases (Cre and Dre) to specifically label Gata6\n              <jats:sup>+<\/jats:sup>\n              pericardial macrophages (GPCMs) in vivo. For functional study, we generated genetic systems to specifically ablate GPCMs by induced expression of DTR (diphtheria toxin receptor) or knockout of Gata6 (GATA binding protein 6) gene in GPCMs. We used these genetic systems to study GPCMs in pericardium intact MI model.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results:<\/jats:title>\n            <jats:p>Dual recombinases-mediated genetic system targeted GPCMs specifically and efficiently. Lineage tracing study revealed accumulation of GPCMs on the surface of MI heart without deep penetration into the myocardium. We did not detect significant change of cardiac fibrosis or function of MI hearts after cell ablation or Gata6 knockout in GPCMs.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions:<\/jats:title>\n            <jats:p>GPCMs minimally invade the injured heart after MI. Nor do they prevent cardiac fibrosis and exhibit reparative function on injured heart. This study also underlines the importance of using specific genetic tool for studying in vivo cell fates and functions.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1161\/circresaha.122.320567","type":"journal-article","created":{"date-parts":[[2022,4,20]],"date-time":"2022-04-20T09:01:18Z","timestamp":1650445278000},"page":"1682-1697","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":38,"title":["Genetic Lineage Tracing of Pericardial Cavity Macrophages in the Injured Heart"],"prefix":"10.1161","volume":"130","author":[{"given":"Hengwei","family":"Jin","sequence":"first","affiliation":[{"name":"State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences (H.J., X.H., J.M., B.Z.), University of Chinese Academy of Sciences, 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B.H.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jialing","family":"Mou","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences (H.J., X.H., J.M., B.Z.), University of Chinese Academy of Sciences, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3446-6699","authenticated-orcid":true,"given":"Zengyong","family":"Qiao","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine, Southern Medical University Affiliated Fengxian Hospital, Shanghai, China (Z.Q.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3154-6570","authenticated-orcid":true,"given":"Ben","family":"He","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Shanghai Chest Hospital, Shanghai 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