Tamanho do texto:
Atualizado em: Segunda-feira, 18 2019 Março

As regras globais devem seguir clamor sobre bebês editados por genes da China

The world’s first gene-edited babies, twin girls Lulu and Nana (not their real names), whose birth was announced only two months ago (November 2018) by a young Chinese scientist who ‘created’ them, have sparked fierce debate in the world science community.

Is their creator, He Jiankui, justified in creating gene-edited human life if the motive is to find a cure for a disease?

He announced the controversial birth of the babies on the eve of the second International Summit on Human Genome Editing in Hong Kong on 28 November 2018 and formally presented his research at the Summit. The 28-year-old scientist from the Southern University of Science and Technology in Guangdong told the Summit that Lulu and Nana’s parents were one of seven couples recruited from a group of patients with HIV. He added that at least one more woman from the group is pregnant with a third gene-edited baby. In a video, he said his team had altered genes to make them resistant to the HIV virus. This genetic tweaking was done on embryos in a lab dish and later implanted in the mother’s womb using the CRISPR–Cas9 genome-editing technique to modify the CCR5 gene.
He admits that his work has not yet been published in a scientific journal, and other pesquisadores have had no access to any dados or DNA samples to confirm his claim.

“He Jiankui’s case points to the need for regulation as soon as possible, an international regulation for research involving human life, like gene manipulation. Such regulations can be under the auspices of the United Nations.”

Crispin Maslog

The scientist said a paper about the work will be publicado in an unspecified journal. However, Chinese laws on genetic resources prevent publication of the gene sequences of either the parents or crianças. So other scientists would still find it difficult to verify his claims.

Global science reacts

The reaction from the science community was immediate, unanimous and negative — the equivalent of a resounding scientific slap on the face. Media reports say many of the 700 scientists and researchers at the Summit were unconvinced about the evidence He presented to show his editing was successful. They suggest that in similar experiments some cells in embryos may be damaged, incompletely edited or escape editing entirely. He did not show up after his talk to answer questions from other scientists or the media. One of them, Annie Chai Wai Yeeng, project leader of Pesquisa de câncer na Malásia, tells SciDev.Net that she and her colleagues heard of He’s babies for the first time only a few days before the Summit when she was visiting the Universidade de Hong Kong, her alma mater.
In an interview with SciDev.Net, Chai says, “It was a surprise to me and all my colleagues…We went through He’s videos describing his research on Youtube and debated among ourselves (on its ética). I would say the majority of us do not totally agree with the rationale he used to justify his work and were quite mad at this rogue scientist.” The Summit participants’ reaction can be summed up with the words of Jennifer Doudna, who pioneered the CRISPR-Cas9 genome-editing tool: “The thought I kept having was the potential for rogue scientists to use this in unethical ways. It’s a real risk,” said Doudna, a biochemist at the Universidade da Califórnia, Berkeley, em um interview with David Cyranoski para natureza.
While it is illegal to deliberately alter the genes of human embryos in many countries including the United States, it is not against the law to do so in China. But the practice is opposed by many researchers lá.

A need to regulate

There is no question that gene editing, like all scientific experiments involving human life, should be regulated.
“All academic institutions and relevant governo ministries should have regulation committees to oversee this [kind of work],” says Chai. She believes that He should be sanctioned by Chinese authorities.
Recent reports in Chinese meios de comunicação suggest that He fears for his life, and that he faces possible charges of bribery and corruption, which carry the death penalty. According to a report in UK media, He is under armed guard after receiving death threats, and the Chinese government has launched an investigation into his work.
The case points to the urgency of international regulation for research involving human life, such as gene manipulation. Such regulations can be under the auspices of the Nações Unidas. Esta peça foi produzida pela Ásia e Pacífico mesa de SciDev.Net.

Se conectar com US

Assine a nossa newsletter