Scientists Have Identified the Mechanism That Decides Between Cell Death and Genome Repair

Scientists Have Identified the Mechanism That Decides Between Cell Death and Genome Repair

The DNA double helix’s sequence is programmed with the genetic information of every cell. When a double DNA strand breaks, it poses a threat to the cells and, if the break is not correctly repaired, it can lead to cancer. Double strand breaks can be caused by exposure to radiation. When a cell is damaged in this way, it has to decide whether the break can be fixed, or whether it should be removed before it causes cancer. If the decision is made for removal, the cell is killed off by a cellular suicide program called “apoptosis”.

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DNA breakthrough finally gives ‘a face to this crime.’ But can it solve a woman’s 1992 murder?

DNA breakthrough finally gives ‘a face to this crime.’ But can it solve a woman’s 1992 murder?

Whoever kidnapped, raped and stabbed Lisa Ziegert before dumping her body in a wooded area in southern Massachusetts left a sliver of DNA on the middle school aide’s corpse. For a quarter-century, that DNA was a dead-end — like all the other evidence in the case — as investigators scoured New England for Ziegert’s killer. The DNA did not match convicted felons or sex offenders in federal or state databases. It did not pan out as new investigative methods made better use of blood and tissue samples found at crime scenes.

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The Americas Are Now Officially ‘Measles-Free’

The Americas Are Now Officially 'Measles-Free'

The Americas are now free of measles, the first region in the world to achieve that goal, the Pan American Health Organization announced this week. The success is credited to the effectiveness of mass vaccination programs over the past 22 years. Yet measles remains a significant problem in other parts of the world, public health officials warn. There were 244,704 cases reported in 2015. And outbreaks could still pop up in the Americas if unvaccinated travelers spread the disease.

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Soaring levels of antibiotic resistance found in supermarket chickens

Soaring levels of antibiotic resistance found in supermarket chickens

The UK’s most common type of food poisoning bug is showing drastically increased resistance to antibiotics, testing has revealed, which could mean the infection becomes harder and harder to treat. The Food Standards Agency (FSA) tested campylobacter bacteria found in chickens sold in supermarkets across the country, and discovered that resistance to certain antibiotics had more than doubled.

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