RNA extraction kits for small samples - (Jul/17/2012 )
I use RNaeasy mini kit from Qiagen to extract RNA. However, when extracting RNA from really small samples (100x103 cells) the quality is terrible and the amount it's not that great.
I've heard of kits which were design for such small samples.
Can anyone advise me one?
do you want to run RT-PCR? if so then just normalize your samples and go ahead. Don't worry about quality. How much is your concentration anyway?
You can alternatively use Trizol, but I can't promise a high quality with that.
I had seen there are some hybrid protocols which involved using both TRIZOL and RNeasy kit.
Hopefully this can help to solve both your yield and quality problem.
Here are some examples I found it from google:
Just my 2 cents.
I use Intron. Their kits usually work slightly better than Qiagen's.
In case of very small sample and the need for high amount and high purity RNA, I would consider some RNA amplification kits, if there is one suitable for microarrays.
You could get decent amount of RNA from small samples with Trizol, but you won't get microarray purity. If you use column to purify after that, you loose the RNA.
Only kits I heard of for small samples were those directly cell-to-Ct and such, where you amplify form kind of lysate and only for a special application, so not usable for microarray.