Hourglass VII Blog Carnival
The latest Hourglass blog carnival is up, another look at the biology of aging: "Alex Palazzo over at The Daily Transcript gives us a very interesting introduction into the cell polarity theory of aging. With all the current interest in stem cells this theory could get plenty of attention and research, which will help provide additional information regarding this theory. .... Chris Patil from Ouroboros informs us about the interesting bridge between calorie restriction, DNA damage, and transcriptional deregulation in aging. It is an intriguing story about how Sirt1 (which increases with calorie restriction), among its many other jobs, both depresses transcription and also when required goes off to repair broken DNA. ... Mo at Neurophilosophy (great blog name) posts about a subject matter which I think will garner a great deal of attention in the coming years - aging and myelin. The traditional theory of brain aging usually concentrates on the loss of neurons as we age. However, Mo post concentrates of the loss of myelin and how it correlates with the behavioural decline in a number of cognitive measurements. By reading his post you will find out what correlates best with the cognitive decline observed with age - loss of neurons or loss of myelin."
Link: http://brainhealthhacks.com/2009/01/20/hourglass-vii-biology-of-aging-blog-carnival/