Friday, January 17, 2014
How sex can make you smarter: Scientists say it encourages the growth of brain cells and improves long-term memory
If you are a rodent
It gives night classes a whole new meaning. Having sex makes you smarter, research suggests.
A study found that middle-aged rats made more new brain cells after mating.
Researchers at the University of Maryland also credited frequent sexual activity with increased brainpower.
However, the benefits to the brain were lost if the creatures stopped mating.
A second study, also published last year, suggested that having sex counteracts the effect of stress on the brain – at least in mice.
Psychologist Tracey Shors told a Society for Neuroscience conference that hard work is needed if these cells are to survive.
She said: ‘You can make new cells with exercise, Prozac and sex.
‘If you do mental training, you’ll keep alive more of the cells you produced. ‘And if you do both, now you have the best of both worlds – you’re making more cells and keeping more alive.’
Gene breakthrough restores the sight of people with inherited eye disease and could save thousands from blindness
This sounds very good indeed. Hopefully the effects are lasting
A pioneering therapy could prevent thousands of people from going blind through old age. The treatment, which involves a single injection, has been found to help restore the sight of people who are suffering from inherited eye disease.
Its success in helping two men who were told they would go blind ‘surpassed expectations’ and it could be used to help the hundreds of thousands of people losing their sight through more common, age-related blindness in future.
How the therapy works
Early findings suggest it promotes an improvement for patients on the verge of losing their sight.
It appears to have halted progression of choroideremia, which is caused by a gene defect that destroys light-sensing cells in the retina at the back of the eye.
But researchers said it also had ‘huge’ implications for the treatment of those with common types of blindness affecting retinal cells.
These include age-related macular degeneration – a disorder affecting 200,000 Britons each year for which there is no preventative treatment, although laser surgery and drugs can help.
Professor Robert MacLaren, who led the operations at Oxford Eye Hospital, said he was ‘absolutely delighted’ with the results so far.
‘It is still too early to know if the gene therapy treatment will last indefinitely, but we can say that the vision improvements have been maintained for as long as we have been following up the patients, which is two years in one case.
'In truth, we did not expect to see such dramatic improvements.’
The trial, part-funded by the charity Fight for Sight and reported in The Lancet journal, involved six patients with different stages of choroideremia, a disease caused by a defect in the gene CHM.
Each patient had only one eye treated, so it could be compared with the other.
There was a marked improvement in the vision of two men whose eyesight had been seriously impaired, while the other four subjects – whose vision was so far largely unaffected – retained the same basic level of sight.
The treatment involves a one-off injection of a harmless virus carrying a properly functioning copy of the CHM gene directly into the retina’s light-sensitive cells.
It cannot replace dead cells, but Prof MacLaren believes that it can help heal ‘sick’ cells and protect healthy cells. ‘If we were able to treat people early, we’d be getting the virus in before their vision is lost,’ he said.
However, choroideremia has one defective gene that needs replacing, whereas macular degeneration involves a number of genes that have to be identified. Trials involving six new subjects are being carried out.
Posted by jonjayray at 12:16 AM