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Analysis of Translation in the Developing Mouse Brain using Polysome Profiling
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Polysome Profiling in Adult Mouse Testes.

Jun-Yan Kang1, Ai Zhong1, Ze Wen1

  • 1State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, China.

Bio-Protocol
|June 16, 2023
PubMed
Summary
This summary is machine-generated.

Polysome profiling offers a simpler method to isolate actively translating messenger RNAs (mRNAs) in mouse testes. This technique aids in understanding gene expression regulation during spermiogenesis.

Keywords:
Germ cellMouse testesPolysome profilingRNA extractionSpermatidSucrose density gradient purificationTesticular lysate preparationTranslation efficiencymRNA translation

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Area of Science:

  • Molecular Biology
  • Genetics
  • Reproductive Biology

Background:

  • Spermiogenesis involves decoupled transcription and translation, making translation regulation crucial for gene expression in post-meiotic spermatids.
  • Understanding the translational state of messenger RNAs (mRNAs) is essential for studying spermiogenesis.
  • Existing methods like ribosome profiling have limitations in speed and complexity.

Purpose of the Study:

  • To describe a simplified and efficient polysome profiling protocol for identifying translating mRNAs in mouse testes.
  • To enable the analysis of translational efficiency discrepancies in mouse testes from different lines.

Main Methods:

  • Mouse testes homogenization and lysis to release polysomes.
  • Sucrose density gradient centrifugation to isolate polysome-bound mRNAs.
  • RNA sequencing (RNA-seq) for characterizing isolated translating mRNAs.

Main Results:

  • The protocol allows for the rapid isolation of polysome RNAs from testes.
  • It bypasses the need for RNase digestion and RNA recovery from gels.
  • The method demonstrates high efficiency and robustness compared to ribosome sequencing (ribo-seq).

Conclusions:

  • Polysome profiling provides a simpler, faster, and robust alternative for analyzing translating mRNAs in mouse testes.
  • This protocol facilitates the study of translational regulation during spermiogenesis.
  • It enables comparative analysis of translational efficiency across different mouse lines.