Hope for infertile men: Breakthrough as scientists grow sperm outside the body
- Mouse sperm successfuly grown in dish
- Team working 'as quickly as possible' to recreate result in humans
- Scientists believe it will be possible
Researchers in Germany and Israel were able to grow mouse sperm from a few cells in a laboratory dish. The scientists believe that the same technique - using 'germ cells' extracted from the testicles - will eventually work in humans
Scientists have made a major breakthrough that could lead to infertile men being able to father their own children, rather than using donor sperm.
Researchers in Germany and Israel were able to grow mouse sperm from a few cells in a laboratory dish.
The scientists believe that the same technique - using 'germ cells' extracted from the testicles - will eventually work in humans.
The team are now 'working as quickly as possible' to reproduce the result in humans.
In a world first a team headed by Professor Stefan Schlatt, at Muenster
University in Germany, were able to grow sperm by using germ cells.
the cells in testicles that are responsible for sperm production.
Scientists grew the sperm by surrounding the germ cells in a special compound called agar jelly to create an environment similar to that found in testicles.
Professor Mahmoud Huleihel, who also grew the sperm at Israel's Ben Gurion
University in Beersheba, said: ‘I believe it will eventually be possible to
routinely grow human male sperm to order by extracting tissue containing germ
cells from a man's testicle and stimulating sperm production in the laboratory.’
The findings of the sperm trial have been revealed in a major scientific journal published by Nature.
Now the scientists who made the discovery have begun experiments that will hopefully lead to the 'Holy Grail' - human sperm grown outside a man's body.
Stephen Gordon, a leading NHS male infertility consultant, praised the breakthrough. He said: ‘This is an amazing development that could revolutionise fertility treatment and allow every man to be a natural father.
‘Infertile men naturally want to be the father of their child but at present
have to accept that can't happen. With the mouse discovery, that could now be a
Professor Richard Sharpe, one of the UK's top fertility
scientists, based at Edinburgh University, who hopes to work on the project,
said: ‘This is a significant step forward towards making human sperm.’
The problem of male infertility has grown over the last 50 years and has been matched by huge decrease in sperm counts in men. Some of this has been attributed to environmental factors such as pollution and female hormones appearing in plastic packaging.
Mr Gordon, a urologist, who practises at Epsom Hopsital, Surrey, said: ‘Even
with our latest microsurgical techniques there are still thousands of men - who
are otherwise healthy -who can't naturally father babies and rely on sperm
Professor Huleihel said his team were now working 'as quickly as possible' to reproduce their success in mice to help infertile men.
‘We have already applied the same tests as we did with mice in the laboratory, using human cells, but as yet have not had success. We are confident that if it can be done in a mammal such as a mouse it can be done in humans.
‘We are experimenting with a number of different compounds to get the germ
cells to grow into sperm. And we believe it will be possible. And, hopefully,
The sperm production breakthrough is reported in the Asian Journal of Andrology this month.
Professor Huleihel added: ‘We were able to produce viable sperm that could have
been used to create baby mice. The sperm appeared healthy and were not
‘It has taken us several years to reach this stage
so a technique to create human sperm won't come overnight but we have started
that research already after our success with mice.’
In an attempt to speed up the search for a way of making human sperm Professor Huleihel's team is about to start talks with Professor Richard Sharpe at Edinburgh University.
Professor Sharpe said: ‘What this research shows is that it will be possible to make human sperm outside the body. The germ cells just need the right environment. That's the tricky part getting them to think they are in the testes Professor Sharpe believes that one novel way may make.it possible. He proposes using a live mouse as a 'host' to make human sperm.
He said: ‘What you would do is take some human testicular tissue with germ
cells and place that under the skin of the mouse and use it to incubate the
‘You could then extract any sperm and use it in fertility
treatment. But we would have to demonstrate that there were no mouse cells
present in the extracted sperm if we were to use this technique and I believe
Mr Gordon, who also treats infertile men at the private New Life Clinic, said: ‘Hundreds of millions have been poured into research into female infertility but research into male infertility attracts relatively little interest.
‘There will be a lot of infertile men hoping this research succeeds and that in
future they won't have to rely on a sperm donor to have child.’
Before human sperm grown in a laboratory could be used in fertility treatment it would have to be licensed. But researchers like Professor Sharpe believes that this hurdle will be overcome.
He said: ‘The main thing that would have to be proved is that the sperm was not genetically damaged and was the same as sperm produced in the testes. Similar checks are already carried out on eggs and embryos used in women's fertility treatment.’
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