CRISPR usado para criar porcos livres de PERV

... que pode ser transmitido a humanos (se órgãos transplantados em humanos):
https://www.usatoday.com/story/news/nation-now/2017/08/11/scientists-closer-using-pig-organs-humans-working-pig-2-0/55903800

Citando:
"The company and its collaborators published their work in the journal Science, where they explain how they created the PERV-less piglets.

Using a genome-editing tool named CRISPR, the researchers created PERV-free embryos, implanted them into surrogate female pigs, which gave birth to piglets without the retrovirus. 

The piglets are now four-and-a-half months old and will be monitored for any long-term effects. "

(...)
"But the fear of transmitting PERVs to humans was, among other hurdles, blocking progress toward successful xenotransplantation, making the eGenesis find an important one."

Edição genética para prevenir doenças pode não ter só vantagens

... E Darwin sabia-o. A China e os EUA já pensam nisso BTW:
http://www.express.co.uk/news/world/747382/SCIENCE-WARNING-Messing-genes-WIPE-OUT-geniuses-earth


Citando:
"Dr Kozubek said: “Before we begin modifying our genes with gene editing tools such as Crispr-Cas9, we’d be smart to recall that genetic variants that contribute to psychiatric conditions may even be beneficial depending on the environment or genetic background.""