How Losing SMARCB1 Affects Rhabdoid Tumor Cells
Author Information
Author(s): Nguyen Linh T., Hains Anastasia E., Aziz-Zanjani Mohammad O., Dalsass Mattia, Farooqee Sheikh B.U.D., Lu Yingzhou, Jackson Peter K., Van Rechem Capucine
Primary Institution: Stanford University
Hypothesis
Does the absence of SMARCB1 in rhabdoid tumor cells alter their sensitivity to translation inhibitors and affect translation efficiency of specific mRNAs?
Conclusion
The loss of SMARCB1 in rhabdoid tumors increases sensitivity to translation inhibitors and alters the translation efficiency of specific mRNAs.
Supporting Evidence
- Rhabdoid tumor cells are more sensitive to the translation inhibitor homoharringtonine when SMARCB1 is absent.
- Re-expression of SMARCB1 increases global translation by 35%.
- 180 mRNAs showed increased translation efficiency upon SMARCB1 re-expression.
Takeaway
When a protein called SMARCB1 is missing in certain cancer cells, those cells become more sensitive to a drug that stops protein making, and they also change how they use their instructions to make proteins.
Methodology
The study used cell viability assays, polysome profiling, immunoprecipitation, global translation assays, and ribosome profiling to assess the effects of SMARCB1 re-expression in rhabdoid tumor cells.
Limitations
The study could not directly compare re-expressed levels of SMARCB1 to original levels due to unknown cell of origin.
Participant Demographics
Cell lines derived from rhabdoid tumors of different origins (brain, kidney, liver).
Statistical Information
P-Value
adjusted p value < 0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website