{"id":10717,"date":"2017-02-08T20:22:24","date_gmt":"2017-02-08T20:22:24","guid":{"rendered":"https:\/\/www.bioecoactual.com\/2017\/02\/08\/sera-nutritiu-el-blat-de-moro-transgenic-que-produeix-cadaverina-i-putrescina\/"},"modified":"2017-03-30T07:36:00","modified_gmt":"2017-03-30T07:36:00","slug":"sera-nutritiu-el-blat-de-moro-transgenic-que-produeix-cadaverina-i-putrescina","status":"publish","type":"post","link":"https:\/\/www.bioecoactual.com\/ca\/2017\/02\/08\/sera-nutritiu-el-blat-de-moro-transgenic-que-produeix-cadaverina-i-putrescina\/","title":{"rendered":"Ser\u00e0 nutritiu el blat de moro transg\u00e8nic que produeix cadaverina i putrescina?"},"content":{"rendered":"<p><em><strong><\/strong><\/em><\/p>\n<p><em><strong><a href=\"http:\/\/www.ecoportal.net\" target=\"_blank\">Eco Portal 08\/02\/2017<\/a><br \/><\/strong><\/em><strong>Ser\u00e0 nutritiu el blat de moro transg\u00e8nic que produeix cadaverina i putrescina?<\/strong><\/p>\n<p>Un estudi publicat recentment a la molt reconeguda revista cient\u00edfica <em>&#8216;Scientific Reports<\/em>&#8216; aportar noves i contundents evid\u00e8ncies sobre la realitat dels cultius transg\u00e8nics i sobre el perill per a la salut dels paquets tecnol\u00f2gics (herbicides) que els acompanyen.<\/p>\n<p>  <!--more-->  <\/p>\n<p>Encara que aquest estudi confirma una cosa que ja se sabia o que pot deduir-se sense massa esfor\u00e7 (que els cultius modificats gen\u00e8ticament NO s\u00f3n \u200b\u200bequivalents als cultius convencionals), ho fa amb dades que s\u00f3n incontrovertibles. En aquesta investigaci\u00f3 es van realitzar an\u00e0lisis detallades dels perfils de pres\u00e8ncia de prote\u00efnes (prote\u00f2mica) i d&#8217;expressi\u00f3 de mol\u00e8cules bioqu\u00edmiques (metobol\u00f3mica) que van revelar difer\u00e8ncies significatives entre una varietat de blat de moro transg\u00e8nic (NK603), modificat gen\u00e8ticament per tolerar l&#8217;herbicida glifosat; i un blat de moro convencional (no transg\u00e8nic).<\/p>\n<p>Per evitar alteracions en els resultats sobre la composici\u00f3 d&#8217;ambd\u00f3s tipus de plantes degudes a factors externs (ambientals), els dos tipus de blat de moro es van sembrar en condicions similars, en la mateixa locaci\u00f3n i en la mateixa temporada, al llarg de dos cicles de sembra. Addicionalment, una porci\u00f3 dels blats de moro transg\u00e8nics sembrats va ser asperjada amb herbicida glifosat en una ocasi\u00f3. L&#8217;an\u00e0lisi va evidenciar una difer\u00e8ncia significativa en l&#8217;expressi\u00f3 de 117 prote\u00efnes i de 91 mol\u00e8cules bioqu\u00edmiques (metab\u00f2lits) en el blat de moro transg\u00e8nic NK603, en comparaci\u00f3 amb el blat de moro convencional. Els autors de l&#8217;estudi van concloure que aquestes difer\u00e8ncies es deuen exclusivament al procediment t\u00e8cnic de modificaci\u00f3 gen\u00e8tica de les plantes de blat de moro.<\/p>\n<p>El <strong>blat de moro transg\u00e8nic NK603<\/strong> va ser originalment generat per Monsanto<em> (<a href=\"http:\/\/www.cera-gmc.org\/GmCropDatabaseEvent\/NK603\" target=\"_blank\">veure aqu\u00ed<\/a>)<\/em>, mitjan\u00e7ant la t\u00e8cnica de transfer\u00e8ncia d&#8217;ADN coneguda com bombardeig de micro part\u00edcules, la qual consisteix, tal com ho diu el nom, en bombardejar part\u00edcules met\u00e0l\u00b7liques microsc\u00f2piques recobertes amb l&#8217;ADN que es vol introduir a c\u00e8l\u00b7lules de la planta (<em><a href=\"http:\/\/online.liebertpub.com\/doi\/abs\/10.1089\/104454902762053891\" target=\"_blank\">veure aqu\u00ed<\/a><\/em>).<\/p>\n<p>Els m\u00e8todes biotecnol\u00f2gics amb els quals s&#8217;han generat pr\u00e0cticament totes les plantes transg\u00e8niques que es comercialitzen actualment no permeten con\u00e8ixer la localitzaci\u00f3 en el genoma en qu\u00e8 for\u00e7osament es va introduir el material gen\u00e8tic d&#8217;inter\u00e8s biotecnol\u00f2gic, ni tampoc quantes c\u00f2pies del transgen s&#8217;han introdu\u00eft, el que fa sentit que les t\u00e8cniques moleculars provoquin trastorns moleculars i metab\u00f2lics en les plantes transg\u00e8niques. L&#8217;estudi va trobar que alguns dels metab\u00f2lits que estaven marcadament alterats en les plantes transg\u00e8niques s\u00f3n composts coneguts com putrescina i cadaverina; la pres\u00e8ncia d&#8217;aquestes mol\u00e8cules en l&#8217;organisme s&#8217;han relacionat a processos inflamatoris i com a precursors de compostos cancer\u00edgens. Els animals morts i en proc\u00e9s de putrefacci\u00f3 produeixen aquests compostos.<\/p>\n<blockquote><p>\u00c9s molt rellevant comentar que la varietat de blat de moro transg\u00e8nic NK603 va ser utilitzat per alimentar rates durant dos anys i determinar si hi havia danys a la salut d&#8217;aquests animals pel consum de blat de moro transg\u00e8nic i glifosat. Aquest estudi va ser durament atacat per les empreses de llavors i per cient\u00edfics amb conflictes d&#8217;inter\u00e8s.<\/p><\/blockquote>\n<p>Aquesta varietat de blat de moro transg\u00e8nic NK603 tolerant a l&#8217;herbicida glifosat va ser aprovat a M\u00e8xic per a consum hum\u00e0 i animal per SAGARPA i COFEPRIS des de l&#8217;any 2002 sense que es realitzaran an\u00e0lisis de laboratori, per\u00f2 com va evidenciar l&#8217;estudi, el blat de moro transg\u00e8nic NK603 no \u00e9s substancialment equivalent al blat de moro convencional. Est\u00e0 aquest blat de moro en els aliments que consumim? \u00bfHi ha a m\u00e9s residus d&#8217;herbicides com ara el glifosat en els aliments? \u00bfLes autoritats avaluen la pres\u00e8ncia de transgens i herbicides en els aliments?<\/p>\n<p><span style=\"background-color: transparent; color: inherit; font-family: inherit; font-size: 18px; font-weight: bold;\">Qu\u00e8 \u00e9s l&#8217;equival\u00e8ncia substancial?<\/span><\/p>\n<p>En el context dels organismes modificats gen\u00e8ticament, el criteri d&#8217;equival\u00e8ncia substancial est\u00e0 basat en una comparaci\u00f3 sup\u00e8rflua de les caracter\u00edstiques entre un OGM i la seva contrapart convencional. Anticipant el desenvolupament i comercialitzaci\u00f3 dels cultius transg\u00e8nics, l&#8217;Organitzaci\u00f3 per a la Cooperaci\u00f3 i el Desenvolupament Econ\u00f2mics -OCDE- (OECD, per les sigles en angl\u00e8s) va introduir l&#8217;equival\u00e8ncia substancial, i aquest concepte posteriorment va ser assumit per l&#8217;organitzaci\u00f3 mundial de la salut ( OMS) i per la FAO. Encara pr\u00e8viament s&#8217;han realitzat i publicat estudis cient\u00edfics -no tan exhaustius com el m\u00e9s recent- que evidencien les alteracions moleculars i metab\u00f2liques en els cultius transg\u00e8nics (per exemple, blat de moro, soja, tabac).<\/p>\n<p>No obstant aix\u00f2, fins al dia d&#8217;avui la gran majoria de cultius transg\u00e8nics estan classificats com substancialment equivalents. L&#8217;equival\u00e8ncia substancial absol les companyies de llavors transnacionals de realitzar proves toxicol\u00f2giques i nutricionals en animals necessaris per establir si l&#8217;efecte biol\u00f2gic dels cultius transg\u00e8nics \u00e9s equivalent a dels seus contraparts convencionals.<\/p>\n<p>Considerant que el blat de moro transg\u00e8nic NK603 tolerant a glifosat va ser aprovat a M\u00e8xic des de 2002, i que no es t\u00e9 certesa que els protocols de bioseguretat mexicans funcionin per evitar la dispersi\u00f3 de blats de moro transg\u00e8nics en el camp mexic\u00e0; ni que l&#8217;organisme de prevenci\u00f3 contra riscos sanitaris ha em\u00e8s informaci\u00f3 sobre la pres\u00e8ncia d&#8217;aquest o altres varietats de blat de moro transg\u00e8nic en els aliments, podem suposar que estem menjant blat de moro transg\u00e8nic que produeix compostos t\u00f2xics: cadaverina, putrescina; a m\u00e9s de l&#8217;herbicida glifosat, classificat com probablement cancerigen.<\/p>\n<p><em>Font:&nbsp;<\/em><a href=\"http:\/\/www.ecoportal.net\" target=\"_blank\">Ecooportal.net<\/a><br \/><em>Publicat a:&nbsp;<\/em>Biodiversidad en Am\u00e9rica Latina y El Caribe &#8211;&nbsp;<a href=\"http:\/\/www.biodiversidadla.org\/\" target=\"_blank\">www.biodiversidadla.org<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eco Portal 08\/02\/2017Ser&agrave; nutritiu el blat de moro transg&egrave;nic que produeix cadaverina i putrescina? Un estudi publicat recentment a la molt reconeguda revista cient&iacute;fica &lsquo;Scientific Reports&lsquo; aportar noves i contundents evid&egrave;ncies sobre la realitat dels cultius transg&egrave;nics i sobre el perill per a la salut dels paquets tecnol&ograve;gics (herbicides) que els acompanyen.<\/p>\n","protected":false},"author":419,"featured_media":10715,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[4012,3114],"class_list":["post-10717","post","type-post","status-publish","format-standard","has-post-thumbnail","tag-maiz-transgenico","tag-ogm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ser\u00e0 nutritiu el blat de moro transg\u00e8nic que produeix cadaverina i putrescina? - Bio Eco Actual<\/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:\/\/www.bioecoactual.com\/ca\/2017\/02\/08\/sera-nutritiu-el-blat-de-moro-transgenic-que-produeix-cadaverina-i-putrescina\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ser\u00e0 nutritiu el blat de moro transg\u00e8nic que produeix cadaverina i putrescina?\" \/>\n<meta property=\"og:description\" content=\"Eco Portal 08\/02\/2017Ser&agrave; nutritiu el blat de moro transg&egrave;nic que produeix cadaverina i putrescina? 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- Bio Eco Actual","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.bioecoactual.com\/ca\/2017\/02\/08\/sera-nutritiu-el-blat-de-moro-transgenic-que-produeix-cadaverina-i-putrescina\/","og_locale":"ca_ES","og_type":"article","og_title":"Ser\u00e0 nutritiu el blat de moro transg\u00e8nic que produeix cadaverina i putrescina?","og_description":"Eco Portal 08\/02\/2017Ser&agrave; nutritiu el blat de moro transg&egrave;nic que produeix cadaverina i putrescina? 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