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Structural Analysis of Sperm Centrioles Using N-STORM.

Abigail Royfman1, Sushil Khanal1, Tomer Avidor-Reiss2,3

  • 1Department of Biological Sciences, University of Toledo, Toledo, OH, USA.

Methods in Molecular Biology (Clifton, N.J.)
|October 19, 2023
PubMed
Summary

Researchers developed a new method to image sperm head and tail positions simultaneously. This technique uses super-resolution microscopy to reveal centriole structure and sperm movement dynamics.

Keywords:
CentrioleDensity gradient techniqueImmunofluorescence stainingSTORMSpermatozoaSwim-up technique

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Area of Science:

  • Cell Biology
  • Microscopy
  • Reproductive Biology

Background:

  • Imaging motile sperm presents challenges due to high frequency beating, rotation, and size differences between head and tail.
  • Precisely determining the position of subcellular structures like the centriole in the sperm neck is complex.

Purpose of the Study:

  • To overcome technical barriers in simultaneously imaging sperm head and tail positions at high resolution.
  • To analyze the relationship between sperm head and tail during the beating cycle and visualize centriolar substructures.

Main Methods:

  • Developed a snap-freezing technique for mobile sperm at various beating cycle stages.
  • Utilized super-resolution microscopy (3D N-STORM) for high-resolution imaging.
  • Detailed procedures for sperm preparation, antibody staining, and image quantification were established.

Main Results:

  • Successfully captured simultaneous microscale positions of sperm head and tail.
  • Achieved nanoscale visualization of centriolar substructure details.
  • Enabled analysis of sperm movement dynamics and subcellular structure relationships.

Conclusions:

  • The developed method overcomes previous imaging limitations for motile sperm.
  • Provides unprecedented detail on sperm structure and movement, crucial for understanding reproductive biology.
  • Offers a robust protocol for studying sperm morphology and function using advanced microscopy.