If you're going to replace lost brain cells why not make a pig of yourself (literally)! See attached link.
This method is being used for another CNS disease but no doubt will come to the aid of MS in due course. With pig brain cells and goat serum, I don't think I'll be able to tick 'human' in my next passport application.
PS I'm on holiday for two weeks from this time next week (no internet access). Please can someone keep these stories coming - you couldn't make them up if you tried! Pig brain cells wrapped in a seaweed derivative sounds like something from my Chinese take-away!