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Off-target genome editing refers to nonspecific and unintended genetic modifications that can arise through the use of engineered nuclease technologies such as: clustered, regularly interspaced, short palindromic repeats ()-Cas9, transcription activator-like effector nucleases (), meganucleases, and zinc finger nucleases (ZFN). [1]
CRISPR interference (CRISPRi) is a genetic perturbation technique that allows for sequence-specific repression of gene expression in prokaryotic and eukaryotic cells. [1] It was first developed by Stanley Qi and colleagues in the laboratories of Wendell Lim , Adam Arkin, Jonathan Weissman , and Jennifer Doudna . [ 2 ]
On 26 November 2018, The CRISPR Journal published ahead of print an article by He, Ryan Ferrell, Chen Yuanlin, Qin Jinzhou, and Chen Yangran in which the authors justified the ethical use of CRISPR gene editing in humans. [74] As the news of CRISPR babies broke out, the editors reexamined the paper and retracted it on 28 December, announcing:
The greatest concern is frequently associated with gain-of-function mutations, which confer novel or increased functionality, and the risk of their release. Gain-of-function research on viruses has been occurring since the 1970s, and came to notoriety after influenza vaccines were serially passed through animal hosts. [citation needed]
The CDC says on its website that vaccines are “very safe,” noting that “the United States’ long-standing vaccine safety system ensures that vaccines are as safe as possible.”
The first clinical trial involving CRISPR started in 2016. It involved taking immune cells from people with lung cancer, using CRISPR to edit out the gene expressed PD-1, then administering the altered cells back to the same person. 20 other trials were under way or nearly ready, mostly in China, as of 2017. [159]
The percentage of teenagers who were up to date on their human papillomavirus (HPV) vaccines has fallen dramatically since 2020, according to new federal data released Thursday. The Centers for ...
The doctors and nurses didn’t believe Tomisa Starr was having trouble breathing. Two years ago, Starr, 61, of Sacramento, California, was in the hospital for a spike in her blood pressure.