— The drug Dimebon failed to produce significant improvements in Alzheimer’s among 600 participants in a phase 3 trial. The results deal a blow to Pfizer, which reportedly purchased development rights from Medivation for $250 million; the latter company had previously done a study of nearly 200 patients, which showed positive results. (WSJ)

– Mosquitoes, hold your disease – and your pee. Researchers found that blocking a renal protein keeps Aedis aegypti mosquitoes from urinating fully. If the dengue-carriers can’t go No.1, they won’t be able to fly and further spread disease.

— What’s next for medical innovation? A replacement organ generated from a patient’s stem cells. At least that’s according to Peter Diamandis, chairman of the X Prize Foundation, which hosts competitions for scientific research (CNet). Also, check out our Q&A on the X Prize in genomics, which will award $10 million to the group that can sequence 100 genomes in 10 days for less than $10,000 each.

— I gut-ta feeling: We might share a lot of the same gut bacteria. In a study of more than 100 Europeans, people shared 40% of the same bacterial species DNA with at least half of the other participants.

Image by Roger Saunders via Flickr Creative Commons