{"id":19924,"date":"2026-02-15T10:21:00","date_gmt":"2026-02-15T08:21:00","guid":{"rendered":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/?p=19924"},"modified":"2026-02-15T17:25:40","modified_gmt":"2026-02-15T15:25:40","slug":"entretien-guillaume-sandoz-la-fonction-de-leffet-anti-douleur-de-la-lumiere-reste-un-mystere","status":"publish","type":"post","link":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/2026\/02\/15\/entretien-guillaume-sandoz-la-fonction-de-leffet-anti-douleur-de-la-lumiere-reste-un-mystere\/","title":{"rendered":"[Entretien] Guillaume Sandoz : \u00ab&nbsp;La fonction de l\u2019effet anti-douleur de la lumi\u00e8re reste un myst\u00e8re&nbsp;\u00bb"},"content":{"rendered":"<div class=\"paragraph\">\n<p><b>La Marseillaise<\/b><b>\u00a0<\/b><b>:<\/b><b> Vous montrez que la lumi\u00e8re ultraviolette induit un effet anti-douleur gr\u00e2ce \u00e0 la mutation d\u2019un g\u00e8ne chez certains animaux \u2013souris, rats, reptiles&#8230; &#8211; mais pas chez d\u2019autres. Comment l\u2019expliquer<\/b><b>\u00a0<\/b><b>?<\/b><\/p>\n<p><b>Guillaume Sandoz<\/b><b>\u00a0<\/b><b>:<\/b> C\u2019est la grande question\u00a0: pourquoi l\u2019\u00e9volution a-t-elle conserv\u00e9 ce g\u00e8ne mut\u00e9 chez certaines esp\u00e8ces uniquement\u00a0? Quelle est sa fonction\u00a0? Cela reste un myst\u00e8re et nous ne savons pas encore. Nous y travaillons avec des coll\u00e8gues de l\u2019Universit\u00e9 Laval \u00e0 Qu\u00e9bec (Canada). Nous essayons de voir quelles esp\u00e8ces poss\u00e8dent ce g\u00e8ne mut\u00e9 et si nous parvenons \u00e0 identifier quelque chose de sp\u00e9cifique \u00e0 ces esp\u00e8ces. Mais une chose est s\u00fbre\u00a0: c\u2019est une mutation acquise dans l\u2019\u00e9volution.<\/p>\n<p><b>C\u2019est-\u00e0-dire<\/b><b>\u00a0<\/b><b>?<\/b><\/p>\n<p><b>G.S.<\/b><b>\u00a0<\/b><b>: <\/b>Elle n\u2019\u00e9tait pas pr\u00e9sente au d\u00e9part, est apparue dans l\u2019\u00e9volution et il y a eu une pression de s\u00e9lection positive &#8211; car elle apportait un avantage &#8211; qui a permis de la conserver chez certaines esp\u00e8ces, notamment les oiseaux.<\/p>\n<p><b>Au-del\u00e0 de l\u2019effet anti-douleur,<br \/>y a-t-il d\u2019autres applications<\/b><b>\u00a0<\/b><b>? <\/b><\/p>\n<p><b>G.S.<\/b><b>\u00a0<\/b><b>:<\/b> Cela ouvre des perspectives en recherche fondamentale dans l\u2019optog\u00e9n\u00e9tique qui consiste \u00e0 introduire des mutations dans des cellules pour les rendre sensibles \u00e0 la lumi\u00e8re. La mutation identifi\u00e9e pourrait \u00eatre introduite ailleurs pour rendre certains neurones sensibles \u00e0 la lumi\u00e8re et mieux \u00e9tudier leur r\u00f4le. D\u2019autres solutions existent, mais l\u2019effet de la lumi\u00e8re s\u2019arr\u00eate g\u00e9n\u00e9ralement lorsqu\u2019on l\u2019\u00e9teint. Dans notre cas, l\u2019effet subsiste plusieurs heures. Cela pourrait \u00eatre int\u00e9ressant dans l\u2019\u00e9tude de l\u2019\u00e9pilepsie.<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"La Marseillaise&nbsp;: Vous montrez que la lumi&egrave;re ultraviolette induit un effet anti-douleur gr&acirc;ce &agrave; la mutation d&rsquo;un g&egrave;ne chez certains animaux &ndash;souris, rats, reptiles&#8230; &#8211; mais pas chez d&rsquo;autres. &#8230;","protected":false},"author":1,"featured_media":19925,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[10,353,988,2001],"news-destination":[],"news-source":[475],"is_homepage":[],"ta_other":[],"class_list":["post-19924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-societe","tag-bouches-du-rhone","tag-sciences","tag-week-end","tag-weekend","news-source-website"],"_links":{"self":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/19924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/comments?post=19924"}],"version-history":[{"count":1,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/19924\/revisions"}],"predecessor-version":[{"id":19926,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/19924\/revisions\/19926"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/media\/19925"}],"wp:attachment":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/media?parent=19924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/categories?post=19924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/tags?post=19924"},{"taxonomy":"news-destination","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/news-destination?post=19924"},{"taxonomy":"news-source","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/news-source?post=19924"},{"taxonomy":"is_homepage","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/is_homepage?post=19924"},{"taxonomy":"ta_other","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/ta_other?post=19924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}