{"id":9838,"date":"2013-02-26T14:50:00","date_gmt":"2013-02-26T22:50:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/affordable-dna-sequencing\/"},"modified":"2023-04-19T11:18:29","modified_gmt":"2023-04-19T18:18:29","slug":"affordable-dna-sequencing","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/affordable-dna-sequencing\/","title":{"rendered":"Affordable DNA Sequencing"},"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>Affordable DNA Sequencing<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  Research conducted by USC Dornsife scientists published in <em>Nature Methods<\/em> may lead to clinical applications of DNA sequencing.\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\">February 26, 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\" style=\"line-height: 32px;\">\n   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fill-rule=\"evenodd\" transform=\"translate(-6 -9)\"\/><\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Two USC Dornsife scientists have developed an algorithm that could help make DNA sequencing affordable enough for clinics &mdash; and could be useful to researchers of all stripes.<\/p>\n<p>Andrew Smith, a computational biologist in USC Dornsife, developed the algorithm with USC Dornsife graduate student Timothy Daley to help predict the value of sequencing more DNA. It was published in <em>Nature Methods<\/em> on Feb. 24.<\/p>\n<p>Extracting information from the DNA means deciding how much to sequence: sequence too little and you may not get the answers you are looking for, but sequence too much and you will waste both time and money. That expensive gamble is a big part of what keeps DNA sequencing out of the hands of clinicians.<\/p>\n<p>But not for long.<\/p>\n<p>&ldquo;It seems likely that some clinical applications of DNA sequencing will become routine in the next five to 10 years,&rdquo; Smith said. &ldquo;For example, diagnostic sequencing to understand the properties of a tumor will be much more effective if the right mathematical methods are in place.&rdquo;<\/p>\n<p>The beauty of Smith and Daley&rsquo;s algorithm, which predicts the size and composition of an unseen population based on a small sample, lies in its broad applicability.<\/p>\n<p>&ldquo;This is one of those great instances where a specific challenge in our research led us to uncover a powerful algorithm that has surprisingly broad applications,&rdquo; Smith said.<\/p>\n<p>Think of it: How often do scientists need to predict what they haven&rsquo;t seen based on what they have?<\/p>\n<p>Public health officials could use the algorithm to estimate the population of HIV positive individuals; astronomers could use it to determine how many exoplanets exist in the galaxy based on the ones they have already discovered, and biologists could use it to estimate the diversity of antibodies in an individual.<\/p>\n<p>The mathematical underpinnings of the algorithm rely on a model of sampling from ecology known as capture-recapture. In this model, individuals are captured and tagged so that a recapture of the same individual will be known &mdash; and the number of times each individual was captured can be used to make inferences about the population as a whole.<\/p>\n<p>In this way scientists can estimate, for example, the number of gorillas remaining in the wild. In DNA sequencing, the individuals are the various different genomic molecules in a sample. However, the mathematical models used for counting gorillas don&rsquo;t work on the scale of DNA sequencing.<\/p>\n<p>&ldquo;The basic model has been known for decades, but the way it has been used makes it highly unstable in most applications,&rdquo; Daley said. &ldquo;We took a different approach that depends on lots of computing power and seems to work best in large-scale applications like modern DNA sequencing.&rdquo;<\/p>\n<p>Scientists faced a similar problem in the early days of the human genome sequencing project. In 1988, a mathematical solution provided by USC Dornsife scholar Michael Waterman found widespread use. Recent advances in sequencing technology, however, require thinking differently about the mathematical properties of DNA-sequencing data.<\/p>\n<p>&ldquo;Huge data sets required a novel approach,&rdquo; Waterman said. &ldquo;I&rsquo;m very pleased it was developed here at USC.&rdquo;<\/p>\n<p>The research was funded by grants (R01 HG005238 and P50 HG002790) from the National Human Genome Research Institute at the National Institutes of Health.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Research conducted by USC Dornsife scientists published in <em>Nature Methods<\/em> may lead to clinical applications of DNA sequencing.<\/p>\n","protected":false},"author":0,"featured_media":9841,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,17],"tags":[1665,1101],"class_list":["post-9838","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","category-student","tag-andrew-smith","tag-michael-waterman"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Affordable DNA Sequencing<\/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\/affordable-dna-sequencing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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