{"id":37110,"date":"2022-12-30T11:36:10","date_gmt":"2022-12-30T10:36:10","guid":{"rendered":"https:\/\/dignitynews.eu\/?p=37110"},"modified":"2022-12-30T11:36:10","modified_gmt":"2022-12-30T10:36:10","slug":"polsko-wloski-zespol-naukowcow-zbadal-przyczyny-wywolujace-padaczke","status":"publish","type":"post","link":"https:\/\/dignitynews.eu\/pl\/polsko-wloski-zespol-naukowcow-zbadal-przyczyny-wywolujace-padaczke\/","title":{"rendered":"Polsko-w\u0142oski zesp\u00f3\u0142 naukowc\u00f3w zbada\u0142 przyczyny wywo\u0142uj\u0105ce padaczk\u0119"},"content":{"rendered":"<h5><strong>Zesp\u00f3\u0142 naukowc\u00f3w z Wydzia\u0142u Fizyki <\/strong><strong>Uniwersytetu Warszawskiego (<\/strong><strong>UW<\/strong><strong>)<\/strong><strong> oraz Istituto Neurologico Carlo Besta w Mediolanie ustali\u0142, \u017ce napady padaczki mog\u0105 rozpocz\u0105\u0107 si\u0119 od wy\u0142adowa\u0144 neuron\u00f3w hamuj\u0105cych w m\u00f3zgu oraz zmian st\u0119\u017ce\u0144 jon\u00f3w w \u015brodowisku wok\u00f3\u0142 neuron\u00f3w. Mechanizm ten, zaobserwowany do\u015bwiadczalnie w modelu zwierz\u0119cym m\u00f3zgu \u015bwinki morskiej, zosta\u0142 potwierdzony w modelu komputerowym kom\u00f3rek nerwowych, kt\u00f3ry zaprojektowali polscy fizycy.<\/strong><\/h5>\n<p>Padaczka jest jedn\u0105 z najcz\u0119\u015bciej wyst\u0119puj\u0105cych chor\u00f3b neurologicznych. Dost\u0119pne na rynku leki pozwalaj\u0105 na kontrolowanie napad\u00f3w, ale u cz\u0119\u015bci pacjent\u00f3w \u2013 nie dzia\u0142aj\u0105.<\/p>\n<p>Wed\u0142ug naszych bada\u0144 napad padaczkowy jest procesem fizjologicznym wywo\u0142anym destabilizacj\u0105 poziomu potasu w m\u00f3zgu. Wskazuje to cele dla nowych strategii terapeutycznych \u2013 wyja\u015bnia dr hab. Piotr Suffczy\u0144ski, prof. UW.<\/p>\n<p>Korzystaj\u0105c z danych do\u015bwiadczalnych, naukowcy z Wydzia\u0142u Fizyki UW skonstruowali pierwszy kompletny model komputerowy symuluj\u0105cy mechanizm przebiegu napadu padaczki.<\/p>\n<p>Nasz biofizycznie realistyczny model obliczeniowy, sk\u0142ada si\u0119 z 5 kom\u00f3rek: 1 hamuj\u0105cej i 4 pobudzaj\u0105cych, z kom\u00f3rek glejowych oraz otoczenia neuron\u00f3w, w kt\u00f3rym nast\u0119puje ruch jon\u00f3w. U\u017cywaj\u0105c tego modelu jako pierwsi pokazali\u015bmy potencjalny mechanizm inicjacji napadu przez neurony hamuj\u0105ce poprzez pocz\u0105tkowe gromadzenie si\u0119 pozakom\u00f3rkowego potasu \u2013 wyja\u015bnia prof. Suffczy\u0144ski. Model pokazuje te\u017c, jak dzia\u0142a mechanizm przyczyniaj\u0105cy si\u0119 do ustania napad\u00f3w. Nier\u00f3wnowaga sodowo-potasowa prowadzi do zwi\u0119kszonej aktywno\u015bci pomp sodowo-potasowych.<\/p>\n<p>Pompa przenosi dwa jony potasu do kom\u00f3rki i trzy jony sodu z kom\u00f3rki w ka\u017cdym cyklu pompy. Proces ten powoduje usuni\u0119cie z kom\u00f3rki jednego jonu dodatniego na cykl i prowadzi do obni\u017cenia potencja\u0142u elektrycznego kom\u00f3rki. Zwi\u0119kszona szybko\u015b\u0107 pompy powoduje znaczne ujemne przesuni\u0119cie potencja\u0142u b\u0142ony kom\u00f3rkowej i prowadzi do zatrzymania napad\u00f3w \u2013 podkre\u015bla badacz.<\/p>\n<p>Adrian Andrzejewski<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Zesp\u00f3\u0142 naukowc\u00f3w z Wydzia\u0142u Fizyki Uniwersytetu Warszawskiego (UW) oraz Istituto Neurologico Carlo Besta w Mediolanie ustali\u0142, \u017ce napady padaczki mog\u0105 rozpocz\u0105\u0107 si\u0119 od wy\u0142adowa\u0144 neuron\u00f3w hamuj\u0105cych w m\u00f3zgu oraz zmian&hellip;<\/p>\n","protected":false},"author":7,"featured_media":37111,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"footnotes":""},"categories":[49],"tags":[],"class_list":["post-37110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nauka"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.4 - 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