cheesymuffin's comment is downvoted, but I think he's on to something. It would be very odd to consider inflammation of the brain to be a cause of any problem, because inflammation is a symptom of something else.
The distinction matters because the best treatment (greatest efficacy, most cost efficient) may target one or more of the links in the causative chain, but not necessarily the root cause.
Prevention can't, and to me Alzheimer's is something that should be prevented. But we work with what we have.
Some evidence the inflammation might be diet related too. Although I can't recall the source at the moment.