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Updated: Oct 17, 2025
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Analysis of Translation in the Developing Mouse Brain using Polysome Profiling
Published on: May 22, 2021
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Accessing the Human Pluripotent Stem Cell Translatome by Polysome Profiling.
Rubens Gomes-Júnior1, Patrícia Shigunov1, Bruno Dallagiovanna1
1Instituto Carlos Chagas-FIOCRUZ-PR, Paraná, Brazil.
Methods in Molecular Biology (Clifton, N.J.)
|October 6, 2021
Summary
This study details polysome profiling in human pluripotent stem cells (hPSCs) to analyze mRNA translation. The method uses sucrose density gradient ultracentrifugation to reveal how noncoding RNAs impact translation.
Area of Science:
- Molecular Biology
- Cell Biology
- Genomics
Background:
- Polysome profiling is crucial for understanding mRNA translation dynamics.
- Analyzing translation in human pluripotent stem cells (hPSCs) is vital for developmental biology and regenerative medicine.
- Existing methods require optimization for complex cellular systems like hPSCs.
Purpose of the Study:
- To establish and optimize a polysome profiling protocol for human pluripotent stem cells (hPSCs).
- To enable the analysis of translational control mechanisms in hPSCs.
- To investigate the role of noncoding RNAs in regulating mRNA translation.
Main Methods:
- Sucrose density gradient ultracentrifugation to separate ribosome-mRNA complexes.
- Utilizing a continuous ultraviolet spectrophotometer and gradient fractionator for precise fraction collection.
- RNA isolation from fractions for downstream analysis via RT-qPCR and large-scale sequencing.
Main Results:
- Successfully implemented polysome profiling in hPSCs, yielding high-resolution separation of polysomal fractions.
- Developed protocols for RNA extraction and analysis from gradient fractions.
- Demonstrated the capability to assess the translational status of specific mRNAs and identify noncoding RNA involvement.
Conclusions:
- The described polysome profiling method is effective for studying translation in hPSCs.
- This technique provides a powerful tool for dissecting translational regulation and the function of noncoding RNAs in stem cell biology.
- The optimized protocol facilitates future research into mRNA translation control in pluripotent cells.
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