genetic engineering

There are new concerns about the world's first genetically modified babies.

It appears that the genetic variation a Chinese scientist was trying to re-create when he edited twin girls' DNA may be more harmful than helpful to health overall, according to a study published Monday. The study, in Nature Medicine, involves the DNA of more than 400,000 people.

A scientist in New York is conducting experiments designed to modify DNA in human embryos as a step toward someday preventing inherited diseases, NPR has learned.

For now, the work is confined to a laboratory. But the research, if successful, would mark another step toward turning CRISPR, a powerful form of gene editing, into a tool for medical treatment.

Editor's note: This story was updated at 11:52 a.m. to add information about an ethics committee investigation into the DNA-editing experiment.

For the first time, a scientist claims to have used a powerful new gene-editing technique to create genetically modified human babies.

The United Kingdom's fertility regulator has put its seal of approval on the "cautious use" of techniques to create a baby from the DNA of three people. The Human Fertilisation and Embryology Authority, or HFEA, announced Thursday that it will now begin to accept applications from fertility clinics that wish to become licensed to perform the procedure.

The decision means the U.K. will sanction and regulate the techniques, known broadly as mitochondrial donation, "in certain, specific cases."

Keys Prepare For Genetically Modified Mosquito Release

Oct 29, 2014
Javier Devilman / Flickr Creative Commons

Two storage rooms at the Florida Keys Mosquito Control District's Marathon building are being converted into a temporary laboratory to raise genetically modified mosquitoes.

If the FDA approves, the Keys could become the first in the U.S. to release the mosquitos, which are intended to reduce the population of aedes aegypti mosquitoes that carry diseases including dengue fever, malaria and chikungunya.