Need an effective siRNA/ shRNA sequence for downregulating caveolin-1 - (Feb/16/2012 )

Do you know of any papers claiming absolute (or close to that) knockdown of cav-1 by RNAi in vitro? Will be glad if you could share the links of any here...thanks in advance!!

FYI: Working with human tumor cells...

check sigma's site. They might have the siRNA sequence. These sequences are supposed to have been tested in their labs.