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Inginerie genetică: modificarea genelor în detrimentul sănătății?
18.08.2022
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Inginerie genetică: modificarea genelor în detrimentul sănătății?
Începând cu 2012, așa-numita foarfecă genetică - CRISPR/Cas - a fost utilizată în cercetarea în domeniul ingineriei genetice. Acest lucru a făcut posibilă corectarea defectelor genetice la embrionii umani pentru prima dată în 2015. În același timp, însă, au fost observate modificări structurale în ADN-ul ființelor vii care au fost transmise mai departe. Este acest pas în progresul cercetării sau un coșmar pentru istoria omenirii?
[citește mai mult]
Din 2012, în ingineria genetică a fost utilizată o nouă metodă, așa-numita foarfecă genetică CRISPR/Cas. Această tehnologie poate fi utilizată pentru a modifica materialul genetic al organismelor vii. În 2015, cercetătorii au folosit-o pentru a corecta pentru prima dată un defect genetic la embrionii umani. Un studiu realizat de Universitatea din Uppsala arată că această metodă, în aparență promițătoare, nu este lipsită de pericole. Echipa științifică a descoperit că CRISPR/Cas poate provoca modificări structurale majore în ADN-ul peștilor zebră. Aceasta, deoarece această metodă poate fi utilizată pentru a "tăia" genomul, adică materialul genetic, și pentru a introduce sau elimina secțiuni de ADN. Dar foarfeca genetică poate, de asemenea, să taie în genom în locuri nedorite. La peștele zebră, modificările nedorite au fost, de asemenea, transmise şi la urmași. Cel mai recent studiu confirmă astfel rapoartele mai vechi care arătau efecte neintenționate ale acestei proceduri de inginerie genetică. Acest "progres științific" ar deschide poarta pentru "îmbunătățirea" genetică a oamenilor și ar putea avea astfel efecte imprevizibile și distructive asupra umanității, precum și asupra altor ființe vii și a mediului înconjurător. Oare asta este ceea ce ne dorim?
18.08.2022 | www.kla.tv/23378
Din 2012, în ingineria genetică a fost utilizată o nouă metodă, așa-numita foarfecă genetică CRISPR/Cas. Această tehnologie poate fi utilizată pentru a modifica materialul genetic al organismelor vii. În 2015, cercetătorii au folosit-o pentru a corecta pentru prima dată un defect genetic la embrionii umani. Un studiu realizat de Universitatea din Uppsala arată că această metodă, în aparență promițătoare, nu este lipsită de pericole. Echipa științifică a descoperit că CRISPR/Cas poate provoca modificări structurale majore în ADN-ul peștilor zebră. Aceasta, deoarece această metodă poate fi utilizată pentru a "tăia" genomul, adică materialul genetic, și pentru a introduce sau elimina secțiuni de ADN. Dar foarfeca genetică poate, de asemenea, să taie în genom în locuri nedorite. La peștele zebră, modificările nedorite au fost, de asemenea, transmise şi la urmași. Cel mai recent studiu confirmă astfel rapoartele mai vechi care arătau efecte neintenționate ale acestei proceduri de inginerie genetică. Acest "progres științific" ar deschide poarta pentru "îmbunătățirea" genetică a oamenilor și ar putea avea astfel efecte imprevizibile și distructive asupra umanității, precum și asupra altor ființe vii și a mediului înconjurător. Oare asta este ceea ce ne dorim?
de la pr/sak.
(Nr. 117, S.12) https://ueaeprints.uea.ac.uk/id/eprint/65894/
https://www.testbiotech.org/aktuelles/unbeabsichtigte-veraenderungen-durch-crisprcas-zeigen-neuartige-risiken
https://www.biorxiv.org/content/10.1101/2021.10.05.463186v1
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