Testing the effect of the diabetes drug Liraglutide in Alzheimer's disease

I found this after reading these pop-science articles. It seems like an interesting line of thought. Does anyone know of any other studies that have already been run?

http://www.popsci.com/science/article/2012-09/newest-impact-...

http://www.guardian.co.uk/commentisfree/2012/sep/10/alzheime...