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NEW YORK — German scientists say cells from the testes of mice can behave like embryonic stem cells. If the same holds true in humans, it could provide a controversy-free source of versatile cells for use in treating disease. Embryonic stem cells can give rise to virtually any tissue in the body and scientists believe they may offer treatments for diseases like Parkinson's and diabetes and spinal cord injuries. But to harvest the cells, human embryos must be destroyed. Some religious groups and others oppose that. The new research into testicular cells, published online Friday by the journal Nature, comes...

Mice testicles yield 'ethical' stem cells * 16:22 24 March 2006 * NewScientist.com news service * Andy Coghlan Men’s testicles may provide an “ethical” source of embryonic stem cells (ESCs), suggest new experiments in mice. A team in Germany has successfully grown mouse ESC-like cells from spermatagonial stem cells which normally turn into sperm. The ESC-like cells can be grown into all tissues of the mouse body, suggesting that if the same could be done in men, it would provide patients with a source of tissue-matched cells for repairing any damaged organs or tissue. So far, all existing colonies of...

Men may cringe at the idea, but sperm-producing stem cells found in testicles could be extracted, grown in the lab, and frozen for future use Men may cringe at the idea, but sperm-producing stem cells found in testicles could be extracted, grown in the lab, and frozen for future use. A team in the Netherlands has successfully harvested spermatogonial stem cells from cows and cultured them inside mouse testes. The hope is that the same thing could be done for men. "This is a very promising route to help young cancer patients undergoing chemotherapy," Dirk de Rooij of Utrecht University,...

AP - Mon Jan 23, 11:19 PM ET A research team led by Syracuse University biologist Scott Pitnick, pictured in Syracuse, N.Y., Monday, Jan. 9, 2006, found that in bat species where the females are promiscuous, the males boasting the largest testicles also had the smallest brains. Conversely, where the females were faithful, the males had smaller testes and larger brains. (AP Photo/Kevin Rivoli) SYRACUSE, N.Y. - For some male bats, sexual prowess comes with a price — smaller brains. A research team led by Syracuse University biologist Scott Pitnick found that in bat species where the females are...

MEN are often accused by women of, to put it bluntly, having their brains in their balls. A joke, of course. But perhaps not as much of one as people might like to think. For a study of bats carried out by Scott Pitnick, of Syracuse University in New York State, and his colleagues, suggests that there really is a trade-off between the two organs. With about 1,000 species, bats are the second-largest group of mammals (rodents are top), so there is plenty of material for interspecies studies. Dr Pitnick's project, published in this week's Proceedings of the Royal Society,...

Big brain means small testes, finds bat study 12:16 07 December 2005 NewScientist.com news service Gaia Vince Proceedings of the Royal Society B: Biological Sciences The brainier male bats are, the smaller their testicles, according to a new study. Researchers suggest the correlation exists because both organs require a lot of energy to grow and maintain, leading individual species to find the optimum balance. The analysis of 334 species of bat found that in species where the females were promiscuous, the males had evolved larger testes but had relatively small brains. In species, where the females were monogamous, the situation...