CrankTexts is the brain child of stand-up comic Theo Von . Theo spends his days texting completely random phone numbers, and seeing what insane conversations he can get his victims into. (This is a new type of crank where I post an ad on Craigslist, then only respond by text message after the people contact me about the item for sale.) Written 2011-03-04 08:00:04 by Theo Von 58 likes

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By Julie Steenhuysen CHICAGO | Fri Mar 4, 2011 3:28pm EST CHICAGO (Reuters) – U.S. researchers have coaxed stem cells into becoming a type of brain cell that dies off early in people with Alzheimer’s disease. The new technology would provide a ready supply of cells for use in testing new drugs or even transplants to help restore lost memory, the team reported on Friday in the journal Stem Cell. While most Alzheimer’s research is done in genetically modified mice, the new technique would allow researchers to study a key aspect of the disease in human cells. “These are cells that are critically important for memory functions,” said Dr. Jack Kessler of Northwestern University Feinberg School of Medicine in Chicago, who worked on the study. Kessler said the team used embryonic stem cells to create the neurons, which are thought to be among the earliest brain cells lost in Alzheimer’s disease. Stem cells are the body’s master cells, the source of all other cells. Embryonic stem cells, taken from days-old human embryos, are especially pliable. The technique to convert stem cells into neurons was developed by Christopher Bissonnette, a former doctoral student in Kessler’s lab, who was inspired by the death of his own grandfather from Alzheimer’s disease, a fatal brain-wasting form of dementia that affects memory, thinking and behavior. When Kessler and Bissonnette implanted the newly grown nerve cells into the brains of mice, they functioned normally, producing nerve fibers called axons and making the brain chemical acetylcholine, used to retrieve memories from other parts of the brain. The researchers say the technique can produce an almost infinite number of these cells, giving other scientists the chance to study these cells. ORDINARY SKIN CELLS The team has used the same approach to make induced pluripotent stem cells, in which ordinary skin cells are reprogrammed into an embryonic-like state. Using these cells, also known as iPS cells, the researchers converted them into brain cells or neurons. The advantage of iPS cells, Kessler said, is they can be made from people with known Alzheimer’s disease, allowing researchers to study differences between healthy cells and diseased cells. The team made neurons from Alzheimer’s patients, healthy people with no family history of Alzheimer’s, and people who are healthy but have a genetic predisposition to develop the disease. “These are real people with real disease. That’s why it’s exciting,” Kessler said. Kessler said the technology is far from ready, but that eventually it may be possible to make replacement memory cells that can be transplanted into people with Alzheimer’s. 1 2 Next

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WASHINGTON – Call them brain pacemakers, tiny implants that hold promise for fighting tough psychiatric diseases — if scientists can figure out just where in all that gray matter to put them. Deep brain stimulation, or DBS, has proved a powerful way to block the tremors of Parkinson’s disease. Blocking mental illness isn’t nearly as easy a task. But a push is on to expand research into how well these brain stimulators tackle the most severe cases of depression, obsessive-compulsive disorder and Tourette’s syndrome — to know best how to use them before too many doctors and patients clamor to try. “It’s not a light switch,” cautions Dr. Michael Okun of the University of Florida. Unlike with tremor patients, the psychiatric patients who respond to DBS tend to improve gradually, sometimes to their frustration. And just because the tics of Tourette’s fade or depression lightens doesn’t mean patients can abandon traditional therapy. They also need help learning to function much as recipients of hip replacements undergo physical therapy, says Dr. Helen Mayberg of Emory University. “Once your brain is returned to you, now you have to learn to use it,” she told the annual meeting of the American Association for the Advancement of Science. Roughly 70,000 people around the world have undergone deep brain stimulation for Parkinson’s or other movement disorders when standard medications fail, says Okun, among leading researchers who gathered at that meeting last week to assess the field. How does it work? Surgeons implant a wire deep in the brain. Tiny electrical jolts — running from a pacemaker-like generator near the collarbone up the neck to that electrode — disable overactive nerve cells to curb the shaking. Scientists figured out which spot to target based on surgery that sometimes helps worst-case Parkinson’s patients by destroying patches of brain tissue. But with deep brain stimulation, the electrodes don’t destroy that tissue. The electrical signals can be adjusted or even turned off if they don’t help, or if they cause neurological side effects. (The surgery, however, does sometimes cause dangerous brain bleeding or infections.) Psychiatric illnesses require a similar operation — but surgeons must implant the electrode into a different spot in the brain. There’s the rub: It’s not clear which spot is best for which psychiatric disease. In fact, two manufacturers — Medtronic and St. Jude Medical — have begun major studies of DBS’ effects on depression. Each places the implant in a different region, based on promising pilot studies. And the Food and Drug Administration in 2009 approved Medtronic’s version for a small group of obsessive-compulsive patients who get no relief from today’s treatments, under a special program that lets devices for rare conditions sell before there’s final proof that they work. Dr. Joseph Fins, medical ethics chief at New York Presbyterian Hospital, worries that may hurt efforts to get such proof. The more available the electrodes are, the more people may seek to try the $30,000 surgeries without enrolling in strict trials. How good is the evidence so far? The researchers are pushing for a registry to track DBS recipients to better tell, but overall they’re cautiously optimistic. Just over 60 people with intractable obsessive-compulsive disorder have undergone DBS since 2000, says Dr. Benjamin Greenberg, a Brown University psychiatrist who is heading a major study funded by the National Institute of Mental Health. About three-fourths of the first few dozen patients studied significantly improved, some as long as eight years. “You still have a burden, but you have a life,” is how he describes the improvement. These are people who try to relieve fears or anxiety with obsessive behavior, such as washing their hands or checking locks repeatedly — many of whom never got out of the house because their daily rituals consumed so much time, Greenberg says.They’d failed behavior therapy designed to teach that whatever they fear doesn’t happen if they skip the ritual. But with the brain pacemaker, somehow that behavior therapy starts working, Greenberg says — maybe by enabling their brains to better remember the lessons. One big hurdle: The battery, tucked near the collarbone, tends to last less than two years. Changing it entails outpatient surgery, one reason that about a third of studied patients stop getting zapped. So Greenberg just began testing a newer version that patients can recharge every few days. Results on about 100 DBS patients with severe depression have been published so far, and roughly half improve regardless of which of the two targeted brain regions is zapped, says Emory’s Mayberg, who shares a patent licensed to St. Jude. Separately, she’s now studying what the successfully treated brains have in common that might help predict the best candidates, hoping to ease “a tremendous burden on the patients” as they decide whether to try these experiments. ___ EDITOR’s NOTE — Lauran Neergaard covers health and medical issues for The Associated Press in Washington. Follow Yahoo! News on Twitter , become a fan on Facebook

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