{"id":27745,"date":"2017-03-30T08:08:21","date_gmt":"2017-03-30T06:08:21","guid":{"rendered":"http:\/\/www.invarena.cz\/?p=27745"},"modified":"2017-03-30T10:41:38","modified_gmt":"2017-03-30T08:41:38","slug":"vedci-bisfenol-s-v-plastovych-vyrobcich-ohrozuje-plodnost","status":"publish","type":"post","link":"https:\/\/www.invarena.cz\/?p=27745","title":{"rendered":"V\u011bdci: Bisfenol S v plastov\u00fdch v\u00fdrobc\u00edch ohro\u017euje plodnost"},"content":{"rendered":"<p><strong>\u010ce\u0161t\u00ed v\u011bdci zjistili, \u017ee l\u00e1tka bisfenol S, kter\u00e1 je \u010dasto obsa\u017een\u00e1 nap\u0159\u00edklad ve v\u00fdrobc\u00edch z plast\u016f, ohro\u017euje plodnost. Ve sv\u00e9 studii, kterou vydal renomovan\u00fd v\u011bdeck\u00fd \u010dasopis Scientific Reports, v\u011bdci dokl\u00e1daj\u00ed, \u017ee bisfenol S po\u0161kozuje vaj\u00ed\u010dka prasat, kter\u00e1 se sv\u00fdmi vlastnostmi podobaj\u00ed vaj\u00ed\u010dk\u016fm \u017een, podobn\u011b z\u00e1va\u017en\u011b jako jeho \u0161kodliv\u00fd p\u0159edch\u016fdce bisfenol A, zn\u00e1m\u00fd jako BPA, sd\u011blil mluv\u010d\u00ed \u010cesk\u00e9 zem\u011bd\u011blsk\u00e9 univerzity (\u010cZU) v Praze Josef Ber\u00e1nek.<\/strong><!--more--><\/p>\n<p>V\u011bdci z \u010cZU, L\u00e9ka\u0159sk\u00e9 fakulty Univerzity Karlovy v Plzni a V\u00fdzkumn\u00e9ho \u00fastavu \u017eivo\u010di\u0161n\u00e9 v\u00fdroby zkoumali p\u016fsoben\u00ed bisfenolu S na vaj\u00ed\u010dka prasnic, kter\u00e1 se sv\u00fdmi vlastnostmi podobaj\u00ed vaj\u00ed\u010dk\u016fm \u017een. Zjistili, \u017ee l\u00e1tka vaj\u00ed\u010dko velmi po\u0161kod\u00ed. &#8222;Bisfenol S naru\u0161\u00ed d\u011blen\u00ed d\u011bdi\u010dn\u00e9 informace vaj\u00ed\u010dek takov\u00fdm zp\u016fsobem, \u017ee z nich u\u017e prakticky nem\u016f\u017ee vzniknout \u017eivotaschopn\u00e9 embryo,&#8220; uvedla jedna z vedouc\u00edch v\u00fdzkumu Tereza \u017dalmanov\u00e1 z \u010cZU.<\/p>\n<p>Bisfenol S nahradil v mnoha v\u00fdrobc\u00edch sv\u00e9ho p\u0159edch\u016fdce bisfenol A neboli BPA, kter\u00fd materi\u00e1lu dod\u00e1val pevnost a trvanlivost. Obsa\u017een je ale nejen ve v\u00fdrobc\u00edch z plast\u016f, kter\u00e9 jsou \u010dasto ozna\u010deny &#8222;BPA free&#8220;, ale t\u0159eba i v bankovk\u00e1ch, ti\u0161t\u011bn\u00fdch \u00fa\u010dtenk\u00e1ch nebo v recyklovan\u00e9m pap\u00edru. O negativn\u00edch \u00fa\u010dinc\u00edch n\u00e1hradn\u00ed l\u00e1tky na zdrav\u00ed se podle v\u011bdc\u016f v\u00ed jen m\u00e1lo.<\/p>\n<p>Spektrum defekt\u016f, kter\u00e9 bisfenol S ve vaj\u00ed\u010dku vyvol\u00e1v\u00e1, je z\u0159ejm\u011b \u0161ir\u0161\u00ed. &#8222;Odchylky od norm\u00e1lu jsme pozorovali ve v\u011bt\u0161in\u011b prov\u011b\u0159ovan\u00fdch vlastnost\u00ed vaj\u00ed\u010dek,&#8220; uvedla dal\u0161\u00ed z autorek studie Krist\u00fdna Ho\u0161kov\u00e1. Defekty podle n\u00ed vyvol\u00e1vaj\u00ed i mno\u017estv\u00ed bisfenolu S, kter\u00e1 jsou b\u011b\u017en\u011b nam\u011b\u0159ena v krvi obyvatel ekonomicky vysp\u011bl\u00fdch zem\u00ed, jako je nap\u0159\u00edklad Japonsko.<\/p>\n<p>V ned\u00e1vn\u00e9 dob\u011b se objevily prvn\u00ed studie popisuj\u00edc\u00ed \u0161kodliv\u00e9 efekty bisfenolu S na ryby a \u010dervy. V\u011bdci upozor\u0148uj\u00ed, \u017ee d\u016fkazy o \u0161kodlivosti bisfenolu S se za\u010d\u00ednaj\u00ed objevovat na cel\u00e9m sv\u011bt\u011b a vyz\u00fdvaj\u00ed proto k vymezen\u00ed jasn\u00fdch pravidel, za jak\u00fdch by se tato l\u00e1tka mohla pou\u017e\u00edvat.<\/p>\n<p>Bisfenol A (BPA), jen\u017e se sv\u00fdmi \u00fa\u010dinky podob\u00e1 bisfenolu S, je podle iDNES v lahv\u00edch na balenou vodu, v kojeneck\u00fdch lahv\u00edch, potravinov\u00fdch boxech, v n\u00e1dob\u00ed z plastu, v d\u011btsk\u00fdch plastov\u00fdch hrn\u00ed\u010dc\u00edch, ve vnit\u0159ku plechovek a konzerv, v elektrick\u00e9m a elektronick\u00e9m vybaven\u00ed nebo v zubn\u00edch v\u00fdpln\u00edch.<\/p>\n<p>Do t\u011bla se dost\u00e1v\u00e1 konzumac\u00ed j\u00eddla nebo n\u00e1poj\u016f z obal\u016f obsahuj\u00edc\u00edch BPA, batolata a mal\u00e9 d\u011bti jsou ohro\u017eeny dotekem \u00fasty. BPA rovn\u011b\u017e migruje ze zubn\u00edch v\u00fdpln\u00ed do pacientov\u00fdch \u00fast, plod d\u00edt\u011bte je ohro\u017een p\u0159es matku. T\u00e9m\u011b\u0159 v\u0161ichni lid\u00e9 jsou vystaveni \u00fa\u010dink\u016fm BPA, v Centru pro kontrolu a prevenc\u00ed nemoc\u00ed zjistili BPA v mo\u010di 93% testovan\u00fdch lid\u00ed.<\/p>\n<p>\u0158ada v\u011bdeck\u00fdch studi\u00ed poukazuje na zdravotn\u00ed rizika zp\u016fsoben\u00e1 bisfenalem A, a to i p\u0159i velmi n\u00edzk\u00fdch d\u00e1vk\u00e1ch. Hroz\u00ed rakovina prsu, varlat \u010di prostaty, cukrovka, astma a v\u00fdvojov\u00e9 poruchy.<\/p>\n<p>Podle dal\u0161\u00edch studi\u00ed vystaven\u00ed se BPA sni\u017euje mu\u017esk\u00e9 sexu\u00e1ln\u00ed funkce a m\u016f\u017ee napodobovat \u017eensk\u00fd hormon estrogen a naru\u0161ovat tak extr\u00e9mn\u011b citliv\u00e9 hormon\u00e1ln\u00ed sign\u00e1ly v t\u011ble. Podle FDA (Food and Drug Administration) m\u016f\u017ee BPA negativn\u011b ovliv\u0148ovat v\u00fdvoj plodu, batolat a mal\u00fdch d\u011bt\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>\u010ce\u0161t\u00ed v\u011bdci zjistili, \u017ee l\u00e1tka bisfenol S, kter\u00e1 je \u010dasto obsa\u017een\u00e1 nap\u0159\u00edklad ve v\u00fdrobc\u00edch z plast\u016f, ohro\u017euje plodnost. Ve sv\u00e9 studii, kterou vydal renomovan\u00fd v\u011bdeck\u00fd <a class=\"mh-excerpt-more\" href=\"https:\/\/www.invarena.cz\/?p=27745\" title=\"V\u011bdci: Bisfenol S v plastov\u00fdch v\u00fdrobc\u00edch ohro\u017euje plodnost\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":27746,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-27745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zpravy"],"_links":{"self":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/posts\/27745","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27745"}],"version-history":[{"count":0,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/posts\/27745\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/media\/27746"}],"wp:attachment":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}