{"id":9806,"date":"2013-03-11T09:35:00","date_gmt":"2013-03-11T16:35:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/the-synergistic-effect\/"},"modified":"2023-04-19T11:18:25","modified_gmt":"2023-04-19T18:18:25","slug":"the-synergistic-effect","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/the-synergistic-effect\/","title":{"rendered":"The Synergistic Effect"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n  \n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>The Synergistic Effect<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  In a study recently published in <em>Cell Reports<\/em>, USC Dornsife researchers found that dual systems collaborate to keep chromosomes intact during DNA replication.\n\n\n<\/div>\n      <\/div>\n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Robert Perkins<\/a><\/strong>\n    \n          <span class=\"post-date-field\">March 11, 2013<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" 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This protects the structure to ensure that the chromosomes separate properly.<\/p>\n<p>If the heterochromatin is lost (due to mutations in the cell), the repetitive DNA becomes vulnerable to rearrangements and recombination. This is particularly true during DNA replication, when the DNA is transiently unwound to be copied.<\/p>\n<p>If there are also defects in replication fork proteins that cause this process to be delayed or inefficient, the rearrangements are dramatically increased. This &ldquo;genome instability&rdquo; can lead to the loss of genetic information or genetic changes that can lead to cell death or cause cancer.<\/p>\n<p>Susan Forsburg, who led the USC Dornsife team that conducted the research, used yeast cells to show that simultaneously disrupting both heterochromatin and replication fork proteins caused significant increases in abnormal chromosomes, and in some cases, cell death.<\/p>\n<p>&ldquo;The insight here is really understanding the mechanism of how these different mutants create a lethal collaboration,&rdquo; said Forsburg, professor of molecular biology in USC Dornsife. &ldquo;Importantly, all the genes we study have human equivalents &mdash; and mutations of some of these are already linked to cancer.&rdquo;<\/p>\n<p>The research appears online in <em>Cell Reports<\/em> on March 7. Forsburg worked with Pao-Chen Li, formerly a graduate student in USC Dornsife and now a postdoctoral researcher at the University of California, San Francisco, as well as Ruben Petreaca, Amanda Jensen, Ji-Ping Yuan and Marc Green, all from USC Dornsife.<\/p>\n<p>&ldquo;We already knew epigenetic modifications change gene expression in cancer,&rdquo; Forsburg said. &ldquo;Now we see a synergistic effect between the structural role of epigenetic modification that creates heterochromatin and replication fork stability.&rdquo;<\/p>\n<p>The next step will be to identify additional components that show this same synergistic effect and to determine what other functions act with heterochromatin to preserve genome stability.<\/p>\n<p>The research was funded by the National Science Foundation and the National Institutes of Health.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>In a study recently published in <em>Cell Reports<\/em>, USC Dornsife researchers found that dual systems collaborate to keep chromosomes intact during DNA replication.<\/p>\n","protected":false},"author":0,"featured_media":9809,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,17],"tags":[620,934],"class_list":["post-9806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","category-student","tag-dna","tag-susan-forsburg"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Synergistic Effect<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dornsife.usc.edu\/news\/stories\/the-synergistic-effect\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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