{"id":6533,"date":"2016-02-12T10:47:25","date_gmt":"2016-02-12T09:47:25","guid":{"rendered":"http:\/\/news.embl.de\/?p=6533"},"modified":"2024-03-25T10:33:57","modified_gmt":"2024-03-25T09:33:57","slug":"1602-self-organisation","status":"publish","type":"post","link":"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/","title":{"rendered":"In sync"},"content":{"rendered":"\n<p>When a mouse embryo is developing, the cells that will form its vertebrae periodically turn specific genes on and off, on and off, in a rhythmic manner. This is a remarkably coordinated process: rows of cells blink in succession, so that if you look at the whole embryo you see the blinking in waves.<\/p>\n\n\n\n<div class=\"vf-video\" style=\"padding-top: 0; padding-bottom: 56.25%;\">\n    <iframe loading=\"lazy\" width=\"640\" height=\"360\" src=\"https:\/\/youtube.com\/embed\/T-fa1gYfwJk\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe>\n<\/div>\n\n\n\n<p class=\"vf-figure__caption\"><em>VIDEO:&nbsp;<\/em><em>Nature.<\/em><\/p>\n\n\n\n<p>Each of these waves ends in the formation of a vertebra. But how does it start?&nbsp;\u201cHow do thousands of cells manage to turn genes on in such a coordinated fashion, in space and time?\u201d Alexander Aulehla, a group leader at EMBL Heidelberg, wanted to know. Scientists in the field had pondered several possibilities. There could be an outside cue that sets the rhythm, or a \u2018pacemaker\u2019 cell \u2013 or group of cells \u2013 that tells the others when to blink. But instead, Aulehla\u2019s postdoc Charisios Tsiairis found that the cells synchronise on their own: they self-organise, as the scientists say.<\/p>\n\n\n\n<p>Studying how these waves start would be extremely difficult to do in an embryo, so the EMBL researchers devised a way to answer the question in a lab dish. In work published today in <em>Cell<\/em>, Tsiairis took tissue from several mouse embryos, separated it into individual cells, and then placed a random mix of cells \u2013 from different embryos and different parts of the embryo \u2013 together. \u201cSo we started from a situation which we call \u2018chaotic\u2019, and let the system unfold its potential,\u201d Aulehla explains. At first, the cells blinked randomly, but they quickly started blinking in sync. Next, they formed circles where blinking happened in a wave, rolling outwards from the centre.<\/p>\n\n\n\n<div class=\"vf-video\" style=\"padding-top: 0; padding-bottom: 56.25%;\">\n    <iframe loading=\"lazy\" width=\"640\" height=\"360\" src=\"https:\/\/youtube.com\/embed\/ztM5G-AG_k4\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe>\n<\/div>\n\n\n\n<p class=\"vf-figure__caption\"><em>VIDEO: EMBL\/C.Tsiairis<\/em><\/p>\n\n\n\n<p>This showed that the cells don\u2019t need any outside cues to determine when \u2013 and how fast \u2013 they blink. But were there specific cells that dictated the rhythm? \u201cWe found that the answer is no,\u201d says Tsiairis. \u201cIt\u2019s a true democracy: the cells all adjust their blinking rate to reach a compromise.\u201d<\/p>\n\n\n\n<p>Aulehla\u2019s lab is now investigating if the principles they found in the dish apply in the embryo, when the first waves are set up. The group is also looking into how cells read the rhythm at which those around them are blinking.<\/p>\n\n\n\n<p>The scientists are confident that similar mechanisms are at work in human embryos, as vertebrae are formed in a very similar way in all vertebrates. What\u2019s more, says Aulehla, researchers working with insects have recently found indications of similar waves \u2013 albeit of different genes \u2013 in the flour beetle <em>Tribolium castaneum<\/em>. \u201cThat\u2019s very exciting; it would be interesting to see how <em>those<\/em> are set up,\u201d he says.<\/p>\n\n\n\n<blockquote class=\"vf-blockquote\"><p>that&#8217;s where self-organisation is so powerful<\/p><\/blockquote>\n\n\n\n<p>In searching for such answers, Aulehla aims to keep self-organisation in mind. After all, he points out, when you\u2019re investigating how a pattern arises in development, if you trace the chain of events back far enough, you\u2019ll reach a point when something just has to have happened for the first time. \u201cThat\u2019s where self-organisation is so powerful: all that\u2019s required are elements with certain properties, which interact locally, and that\u2019s it \u2013 that\u2019s enough to bring about complex patterns. So once you know these properties, and importantly the interactions, then you understand how those complex structures can spontaneously appear. I find this fascinating!\u201d<\/p>\n\n\n\n<p>Evidence of this fascination can be found right on his desk, where a book titled <em>Self-organisation in biological systems<\/em> lies within easy reach. In it are accounts of how synchronised flashes arise in swarms of fireflies, how schooling fish form patterns, \u2026 it even examines the role of self-organisation in the building of termite nests. Aulehla\u2019s own work could now add a new example: how genetic waves are formed in developing embryos. And at the end of his next talk, perhaps he will listen for the synchronised clapping that can emerge spontaneously from an audience.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What do cells in an embryo have in common with schools of fish, swarms of fireflies, and applauding audiences?<\/p>\n","protected":false},"author":8,"featured_media":6535,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,17591],"tags":[352,55,43,245],"embl_taxonomy":[],"class_list":["post-6533","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","category-science-technology","tag-aulehla","tag-development","tag-heidelberg","tag-video"],"acf":{"article_intro":"<p>What do cells in an embryo have in common with schools of fish, swarms of fireflies, and applauding audiences? A study by the <a href=\"http:\/\/www.embl.de\/research\/units\/dev_biology\/aulehla\" target=\"_blank\">Aulehla lab<\/a> provides an intriguing answer.<\/p>\n","related_links":[{"link_description":"N\u00e9da Z et al. (2000). The sound of many hands clapping. Nature. DOI: 10.1038\/35002660","link_url":"http:\/\/dx.doi.org\/10.1038\/35002660"},{"link_description":"Sarrazin AF, Peel, AD & Averof M (2012). A Segmentation Clock with Two-Segment Periodicity in Insects. Science DOI: 10.1126\/science.1218256","link_url":"http:\/\/dx.doi.org\/10.1126\/science.1218256"}],"article_sources":[{"source_description":"<p>Tsiairis CD &amp; Aulehla A. <em>Cell<\/em>, 11 February 2016. DOI:10.1016\/j.cell.2016.01.028<\/p>\n","source_link_url":"http:\/\/www.cell.com\/cell\/abstract\/S0092-8674(16)30042-3"}],"vf_locked":false,"featured":false,"color":"#007B53"},"embl_taxonomy_terms":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>In sync | EMBL<\/title>\n<meta name=\"description\" content=\"What do cells in an embryo have in common with schools of fish, swarms of fireflies, and applauding audiences? They self-organise.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In sync | EMBL\" \/>\n<meta property=\"og:description\" content=\"What do cells in an embryo have in common with schools of fish, swarms of fireflies, and applauding audiences? They self-organise.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/\" \/>\n<meta property=\"og:site_name\" content=\"EMBL\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/embl.org\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-02-12T09:47:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-25T09:33:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.embl.org\/news\/wp-content\/uploads\/2016\/02\/1602-self-organisation-ib.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"620\" \/>\n\t<meta property=\"og:image:height\" content=\"425\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Sonia Furtado Neves\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Aur_ora\" \/>\n<meta name=\"twitter:site\" content=\"@embl\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sonia Furtado Neves\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/\"},\"author\":{\"name\":\"Sonia Furtado Neves\",\"@id\":\"https:\/\/www.embl.org\/news\/#\/schema\/person\/d926199a955624b44dda296f396c5e68\"},\"headline\":\"In sync\",\"datePublished\":\"2016-02-12T09:47:25+00:00\",\"dateModified\":\"2024-03-25T09:33:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/\"},\"wordCount\":650,\"publisher\":{\"@id\":\"https:\/\/www.embl.org\/news\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.embl.org\/news\/wp-content\/uploads\/2016\/02\/1602-self-organisation-ib.jpg\",\"keywords\":[\"aulehla\",\"development\",\"heidelberg\",\"video\"],\"articleSection\":[\"Science\",\"Science &amp; Technology\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/\",\"url\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/\",\"name\":\"In sync | EMBL\",\"isPartOf\":{\"@id\":\"https:\/\/www.embl.org\/news\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.embl.org\/news\/science\/1602-self-organisation\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.embl.org\/news\/wp-content\/uploads\/2016\/02\/1602-self-organisation-ib.jpg\",\"datePublished\":\"2016-02-12T09:47:25+00:00\",\"dateModified\":\"2024-03-25T09:33:57+00:00\",\"description\":\"What do cells in an embryo have in common with schools of fish, swarms of fireflies, and applauding audiences? 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