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Live-cell imaging of human spermatozoa using structured illumination microscopy.
Ida S Opstad1,2, Daria A Popova3,2, Ganesh Acharya3,4
1Department of Physics and Technology, UiT The Arctic University of Norway, 9037 Tromsø, Norway.
Biomedical Optics Express
|May 9, 2019
Summary
Researchers developed live-cell super-resolution microscopy for human sperm. This technique allows detailed observation of sperm structures, aiding research into male infertility and improving in vitro fertilization.
Area of Science:
- Spermatozoa structural biology
- Reproductive health research
- Live-cell super-resolution microscopy
Background:
- Spermatozoa nanostructural studies traditionally used fixed cells and electron microscopy.
- Limited understanding of live sperm dynamics hinders fundamental biology and reproductive health insights.
Purpose of the Study:
- To establish protocols for live-cell multi-color super-resolution imaging of human spermatozoa.
- To enable high-resolution visualization of key sperm structures in living cells.
Main Methods:
- Utilized structured illumination microscopy (SIM) for super-resolution imaging.
- Employed agarose patches for immobilizing live human spermatozoa.
- Achieved four-channel 3D SIM imaging of plasma membrane, nucleus, mitochondria, and microtubules in the same cell.
Main Results:
- Demonstrated successful live-cell multi-color 3D SIM imaging of human spermatozoa.
- Visualized multiple key subcellular structures (plasma membrane, nucleus, mitochondria, microtubules) simultaneously in living sperm.
Conclusions:
- High-resolution live-cell imaging of spermatozoa is now feasible.
- This technique can advance research on fundamental cellular mechanisms and male infertility.
- Potential applications include improved sperm selection for in vitro fertilization treatments.
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