{"id":5026,"date":"2023-03-10T10:15:23","date_gmt":"2023-03-10T18:15:23","guid":{"rendered":"https:\/\/keck.usc.edu\/news\/how-to-assemble-a-complete-jaw\/"},"modified":"2023-11-19T12:56:16","modified_gmt":"2023-11-19T20:56:16","slug":"how-to-assemble-a-complete-jaw","status":"publish","type":"post","link":"https:\/\/keck.usc.edu\/news\/how-to-assemble-a-complete-jaw\/","title":{"rendered":"How to assemble a complete jaw"},"content":{"rendered":"\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=\"text-container\">\n              \n<div class=\"f--field f--eyebrow\">\n\n    \n  <span>Press Release<\/span>\n\n\n\n<\/div>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n      <h1>How to assemble a complete jaw<\/h1>\n\n\n<\/div>\n    \n    \n          <div class=\"meta\">\n                  <span class=\"author\">Cristy Lytal<\/span>\n        \n                  <span class=\"date\">March 10, 2023<\/span>\n              <\/div>\n    \n              \n<div class=\"f--field f--share-links\">\n\n    \n  <ul class=\"share-links\" aria-label=\"Share this article\">\n          <li>\n        <a class=\"share-links__button share-links__button--facebook\" href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fkeck.usc.edu%2Fnews%2Fhow-to-assemble-a-complete-jaw%2F\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" aria-label=\"Share on Facebook (opens in a new tab)\">\n          <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 32 32\" aria-hidden=\"true\" focusable=\"false\"><path fill=\"currentColor\" d=\"M28 16c0-6.627-5.373-12-12-12S4 9.373 4 16c0 5.628 3.875 10.35 9.101 11.647v-7.98h-2.474V16H13.1v-1.58c0-4.085 1.849-5.978 5.859-5.978.76 0 2.072.15 2.608.298v3.325c-.283-.03-.775-.045-1.386-.045-1.967 0-2.728.745-2.728 2.683V16h3.92l-.673 3.667h-3.247v8.245C23.395 27.195 28 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2.004.382 2.75 1.146l2.777 2.79c.75.747 1.12 1.66 1.12 2.737 0 1.105-.392 2.045-1.183 2.817l1.186 1.186c.774-.79 1.708-1.186 2.805-1.186 1.078 0 1.995.377 2.75 1.132l2.804 2.804c.754.755 1.13 1.672 1.13 2.75z\"\/><\/svg>\n      <\/button>\n    <\/li>\n  <\/ul>\n\n  <span class=\"visually-hidden\" role=\"status\" data-share-links-status><\/span>\n\n\n<\/div>\n    \n  <\/div>\n\n          \n<div class=\"f--field f--image\">\n\n    \n    \n    \n        <figure>\n    \n    \n    \n              \n      <img\n                            data-src=\"https:\/\/keck.usc.edu\/news\/wp-content\/uploads\/sites\/68\/2023\/11\/One-week-old-zebrafish-with-jaw-cartilage-in-blue-tendons-in-magenta-and-jaw-muscles-in-white-by-Hung-Jhen-Olivia-Chen-Crump-Lab-1500x1000-1-768x432.jpg\"\n          data-srcset=\"https:\/\/keck.usc.edu\/news\/wp-content\/uploads\/sites\/68\/2023\/11\/One-week-old-zebrafish-with-jaw-cartilage-in-blue-tendons-in-magenta-and-jaw-muscles-in-white-by-Hung-Jhen-Olivia-Chen-Crump-Lab-1500x1000-1-1280x720.jpg 1280w,https:\/\/keck.usc.edu\/news\/wp-content\/uploads\/sites\/68\/2023\/11\/One-week-old-zebrafish-with-jaw-cartilage-in-blue-tendons-in-magenta-and-jaw-muscles-in-white-by-Hung-Jhen-Olivia-Chen-Crump-Lab-1500x1000-1-768x432.jpg 768w\"          data-sizes=\"(min-width:1200px) 75vw, (min-width:768px) 83vw, 100vw\"          class=\"lazyload\"\n        \n                alt=\"\"\n\n                \n        \n                \n                                      \/>\n\n    \n          <figcaption>One-week-old zebrafish with jaw cartilage in blue, tendons in magenta, and jaw muscles in white. (Image by Hung-Jhen (Olivia) Chen\/Crump Lab)<\/figcaption>\n    <\/figure>\n    \n  \n  \n\n<\/div>\n  \n\n  <\/div><\/div>\n\r\n\r\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text white\"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n  <div class=\"inner-wrapper\">\n        \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>A USC-led team of scientists has made a drool-worthy discovery about how tendons and salivary glands develop in the jaw. Their results are published in a new study in <em>Developmental Cell<\/em>.<\/p>\n<p>In order for our jaws to function, they require not only a precisely patterned skeleton, but also tendons that connect the jaw skeleton to muscles and salivary glands that lubricate the mouth. Remarkably, the skeleton, tendons, and glands all derive from the same population of stem cells, which arise from a cell population known as neural crest. How these neural crest-derived cells know to make the right type of cell in the right location has remained a mystery.<\/p>\n<p>To begin answering this question, first author Hung-Jhen (Olivia) Chen from <a href=\"http:\/\/crumplab.usc.edu\/\" target=\"_blank\" rel=\"noopener\" alt=\"How to assemble a complete jaw\">the lab of corresponding author Gage Crump<\/a>, professor and vice-chair of stem cell biology and regenerative medicine at USC at the Keck School of Medicine of USC, and colleagues examined all the genes that were active in the developing face of zebrafish. They then honed in on one particular gene, Nr5a2, that was active in a region of the face that makes tendons and glands, but not skeleton.<\/p>\n<p>To understand the role of Nr5a2, the scientists created zebrafish lacking this gene. These mutant zebrafish generated excess cartilage and were missing tendons in their jaws.<\/p>\n<p>The scientists also developed mice lacking this gene specifically in their neural crest cells. These mice not only had skeletal and tendon defects in their jaws, but also failed to develop salivary glands. Similar defects were also seen in the middle ear, reflecting a dramatic evolutionary transition in which part of the fish jaw became the mammalian middle ear.<\/p>\n<p>\nTo read more, please visit <a href=\"https:\/\/stemcell.keck.usc.edu\/how-to-assemble-a-complete-jaw\/\" target=\"_blank\" rel=\"noopener\" alt=\"How to assemble a complete jaw\">https:\/\/stemcell.keck.usc.edu\/<\/a><\/p>\n\n\n\n<\/div>\n  <\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":84,"featured_media":5028,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[169,436],"class_list":["post-5026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-release","tag-latest","tag-usc-stem-cell"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.6) - 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