Manipulation of immune system removes amyloid plaques from mice brain

To do this, the researchers over-expressed IL-6 in the brains of newborn mice that had yet to develop any amyloid plaques, as well in mice with pre-existing plaques. Using somatic brain transgenesis technology, scientists analyzed the effect of IL-6 on brain neuro-inflammation and plaque deposition. In both groups of mice, the presence of IL-6 lead to the clearance of amyloid plaques from the brain.

http://esciencenews.com/articles/2009/10/15/scientists.remove.amyloid.plaques.brains.live.animals.with.alzheimers.disease