You could try storage in a cell lysis buffer such as a guanidine thiocyanate buffer (Qiagen etc) and this could protect the RNA and denature degrading RNAses providing that you carry out the initial lysis step as advised in manufacturer handbook. I never have a problem with RNA later providing that the original solution has been kept at ambient temps and not cooled.

Hi Arjun,

I suggest to ship your sample in RNA-later. I agree with Stephen ... Also, I would test it before I even mail them. I mean that store some in RNA later in the lab in room temp and extract RNA and see how it work...

Good luck...