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<\/div>An electron micrograph of HIV, which currently requires lifelong medication<\/p>\n
Scott Camazine\/Alamy Stock Photo<\/p>\n<\/div>\n<\/figcaption><\/figure>\n<\/p>\n
A new way to eradicate HIV from the body could one day be turned into a cure for infection by this virus, although it hasn\u2019t yet been shown to work in people.<\/p>\n
The strategy uses a relatively recent genetic technique called CRISPR, which can make cuts in DNA to introduce errors into viral genetic material within immune cells. \u201cThese findings represent a pivotal advancement towards designing a cure strategy,\u201d researcher\u00a0Elena Herrera Carrillo<\/a> at the University of Amsterdam in the Netherlands said in a statement.<\/p>\n While infection with HIV<\/a> was once nearly always fatal, those with the virus can now take drugs that stop it from reproducing. This gives them a nearly normal lifespan, as long as they diligently take their medicines every day.<\/p>\n But when people are first infected, some of the virus inserts its DNA into their immune cells, where it stays dormant. If they stop taking their HIV medicines, this DNA \u201creawakens\u201d and the virus starts spreading through their immune systems again.<\/p>\n For a cure, we need some way of killing any dormant virus in the body. Several strategies have been tried, but none has so far been found to work.<\/p>\n <\/p>\n The latest approach uses a gene-editing system called\u00a0CRISPR.<\/a> Originally discovered in bacteria, this homes in on a specific DNA sequence, making cuts in it. By changing the DNA sequence being targeted, the system can potentially be turned into a form of gene therapy for many conditions, with the first such treatment having been approved last year in the US and UK as a cure for sickle cell anaemia<\/a>.<\/p>\n Several groups are investigating using CRISPR that targets a gene in HIV as a way of disabling dormant virus. Now, Carrillo and her team have shown that, when tested on immune cells in a dish, their CRISPR system could disable all virus, eliminating it from these cells. The work is due to be presented at the European Congress of Clinical Microbiology and Infectious Diseases<\/a>\u00a0in Barcelona, Spain, next month.<\/p>\n Jonathan Stoye<\/a> at the Francis Crick Institute in London says that although the results are encouraging, the next step is trials in animals and eventually people to show the treatment can reach all the immune cells with dormant HIV. Some of these cells are thought to reside in bone marrow, but there may be other body sites involved too, he says. \u201cThere\u2019s still a fair amount of uncertainty about whether there are other reservoirs in other parts of the body,\u201d he says.<\/p>\n A Californian firm called Excision BioTherapeutics has previously shown that a CRISPR-based approach can reduce the amount of dormant virus in monkeys infected with a similar virus to HIV<\/a>.<\/p>\n Topics:<\/p>\n<\/section><\/div>\n