Couldn't find much out about nude mice so far, but have a look at this:
Strains Of Laboratory Mice More Varied Than Previously Thought
http://www.sciencedaily.com/releases...0730092539.htm
"if one is studying mouse strains for responses to particular drugs, you make assumptions that the strains have certain pedigrees. If they don't, what you are doing may not mean anything."
Wow.