Question: RNA-seq Data for Kidney Tissue
0
gravatar for adena
16 days ago by
adena0
adena0 wrote:

Where can I find RNA-seq data for normal kidney tissue with expression levels so I can compare it to a type of kidney cancer? The data for the tumors were retrieved from GDC.

rna-seq • 104 views
ADD COMMENTlink modified 16 days ago by dsull1.5k • written 16 days ago by adena0
1
gravatar for swbarnes2
16 days ago by
swbarnes28.2k
United States
swbarnes28.2k wrote:

RNASeq is very sensitive to batch effects. If we compared normal kidneys from your lab and my lab, there would be significant differences.

If you get control tissues from another experiment, any differences you see might be due entirely to batch, not biology. The most you can do is exploratory work, meaning step one of any further experiments will be to try and verify that what you found is biology, and not batch.

ADD COMMENTlink written 16 days ago by swbarnes28.2k
1
gravatar for dsull
16 days ago by
dsull1.5k
UCLA
dsull1.5k wrote:

GDC has matched normal tissue controls for kidney cancer (TCGA-KIRC). You can use those.

Also, since batch effects were mentioned in another post: You can do some comparisons between tumor vs. normal from separate experiments -- you just have to be careful about how you do so. You can't do a robust differential gene expression analysis when your tumor/control condition is completely confounded by batches. But that doesn't make the data useless for comparisons: You can do gene sets, pathways, correlations, etc. analyses separately for the normal tissue and the tumor tissue. For example: Regardless of batch effects, kidney markers should generally be ranked highly in kidney normal tissue while tumor markers should generally be ranked highly in tumor tissue, if you rank all genes by expression within individual samples.

ADD COMMENTlink written 16 days ago by dsull1.5k
Please log in to add an answer.

Help
Access

Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
Powered by Biostar version 2.3.0
Traffic: 943 users visited in the last hour