Can't help you with "Защита Лужина", I'm afraid (if it were Pnin you were after, you'd be in luck...), but I'd be interested in anything you could tell me about the film version of "Собачье сердце".

When was it released (post-1991, I would imagine)? Is it any good? It must have constituted - above all else - a real technical feat to adapt it successfully, considering the theme.