Bladder cells regurgitate bacteria to prevent urinary tract infections

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1. Scientists reverse aging in human cell lines and give theory of aging a new lease of life Can the process of aging be delayed or even reversed? Research led by specially appointed Professor Jun-Ichi Hayashi from the University of Tsukuba in Japan has shown that, in human cell lines at least, it can. They also found that the regulation of two genes involved with the production of glycine, the smallest and simplest amino acid, is partly responsible for some of the characteristics of aging....
2. Targeted drug delivery could transform therapies A world expert in biomedical engineering will today argue that medical science has been focusing on the wrong problem for 30 years. Instead of inventing new drugs, making better use of the drugs we already have available by targeting them to the affected part of the body could hold the answer to tackling many of today's life threatening diseases....
3. Researchers call for more fairness in using testosterone levels to judge femaleness of elite athletes (Medical Xpress)—A pair of researchers, one with Stanford University, the other Barnard College, has published a Policy Forum piece in the journal Science, calling for changes to the way female athletes are judged on their fitness to compete as women in major sporting events. Katrina Karkazis and Rebecca Jordan-Young note that thus far there have only been two serious studies done on the topic and they came back with conflicting results, which suggests that sports organizations that use testosterone levels to exclude women from competing with other women are unfair....
4. Measles-flu comparison yields insights for vaccine design By comparing flu viruses to the virus that causes measles, researchers fine-tuned a tool that may enable faster vaccine design, according to a study led by Mount Sinai researchers and published online this week in the journal Cell Reports....
5. Scientists regenerate bone tissue using only proteins secreted by stem cells Scientists have discovered a way to regrow bone tissue using the protein signals produced by stem cells....