Cannot replicate RNA expression comparison between studies

[Francesco Tamiro]

I am probably making a naive and stupid question, but some months ago we received data from a collaborator that used cBioportal, showing a comparison of RNA and protein levels for a certain gene and the plots had different studies aggregated (mostly leukemia, but also some solid tumors, and then only leukemia-focused studies).

I need to replicate that kind of analysis. I explored the site, and I did my homework by reading around and watching the tutorials available, but I am not able to replicate that kind of plot and analysis. Am I missing something, or maybe there was an update and now we cannot compare across different studies?

Attaching a plot for reference. Please ignore red boxes and arrows as those were added later.

Thanks,

Francesco

[Aaron L]

Hi Francesco, 

Not stupid!  We apologize for the announced disappearance of this capability.   We decided to shut it off because expression data is not normalized across studies (except among the TCGA PanCan Atlas studies).   In the future there is a plan to further identify classes of studies that can be compared (a la PanCan) in this way.

Let us know if you have further questions.

--Aaron

    

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[Francesco Tamiro]

Hi Aaron, 

Thank you so much for the quick and informative answer. I strongly suspected this could be the reason, and I am well aware of the problem of comparing such data from different studies. But thanks for confirming this! 

Best,

Francesco

[Nikolaus Schultz]

Hi Francesco,

We still have this functionality for the TCGA Pan Cancer Atlas studies.

Try the link below, or get to this using the following steps:

1 -Quick Select TCGA PanCancer Atlas Studies

2 - Enter a gene of your choice and hit Query by Gene

3 - Select the Plots tab

4 - Under Examples, click on mRNA vs Study (all the way on the right).

Niki.

https://www.cbioportal.org/results/plots?cancer_study_list=laml_tcga_pan_can_atlas_2018%2Cacc_tcga_pan_can_atlas_2018%2Cblca_tcga_pan_can_atlas_2018%2Clgg_tcga_pan_can_atlas_2018%2Cbrca_tcga_pan_can_atlas_2018%2Ccesc_tcga_pan_can_atlas_2018%2Cchol_tcga_pan_can_atlas_2018%2Ccoadread_tcga_pan_can_atlas_2018%2Cdlbc_tcga_pan_can_atlas_2018%2Cesca_tcga_pan_can_atlas_2018%2Cgbm_tcga_pan_can_atlas_2018%2Chnsc_tcga_pan_can_atlas_2018%2Ckich_tcga_pan_can_atlas_2018%2Ckirc_tcga_pan_can_atlas_2018%2Ckirp_tcga_pan_can_atlas_2018%2Clihc_tcga_pan_can_atlas_2018%2Cluad_tcga_pan_can_atlas_2018%2Clusc_tcga_pan_can_atlas_2018%2Cmeso_tcga_pan_can_atlas_2018%2Cov_tcga_pan_can_atlas_2018%2Cpaad_tcga_pan_can_atlas_2018%2Cpcpg_tcga_pan_can_atlas_2018%2Cprad_tcga_pan_can_atlas_2018%2Csarc_tcga_pan_can_atlas_2018%2Cskcm_tcga_pan_can_atlas_2018%2Cstad_tcga_pan_can_atlas_2018%2Ctgct_tcga_pan_can_atlas_2018%2Cthym_tcga_pan_can_atlas_2018%2Cthca_tcga_pan_can_atlas_2018%2Cucs_tcga_pan_can_atlas_2018%2Cucec_tcga_pan_can_atlas_2018%2Cuvm_tcga_pan_can_atlas_2018&Z_SCORE_THRESHOLD=2.0&RPPA_SCORE_THRESHOLD=2.0&profileFilter=mutations%2Cstructural_variants%2Cgistic&case_set_id=all&gene_list=ERBB2&geneset_list=%20&tab_index=tab_visualize&Action=Submit&plots_horz_selection=%7B%22dataType%22%3A%22clinical_attribute%22%2C%22selectedDataSourceOption%22%3A%22CANCER_STUDY%22%7D&plots_vert_selection=%7B%22selectedGeneOption%22%3A2064%2C%22dataType%22%3A%22MRNA_EXPRESSION%22%2C%22selectedDataSourceOption%22%3A%22rna_seq_v2_mrna%22%2C%22logScale%22%3A%22true%22%7D&plots_coloring_selection=%7B%7D

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