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A novel microfluidic device for human sperm separation based on rheotaxis.

Alireza Heidarnejad1, Mohammadreza Sadeghi1, Saeid Arasteh1

  • 1Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.

Zygote (Cambridge, England)
|December 27, 2024
PubMed
Summary

A new microfluidic device effectively isolates highly motile sperm, improving sperm quality for potential fertilization. This rheotaxis-based separation method enhances motility and morphology compared to other techniques.

Keywords:
Density gradient centrifugationMicrofluidicsRheotaxisSperm separationSperm trajectories

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Area of Science:

  • Reproductive Biology
  • Biomedical Engineering
  • Microfluidics

Background:

  • Sperm separation techniques are crucial for assisted reproductive technologies.
  • Traditional methods like density gradient centrifugation have limitations in sperm quality enhancement.
  • Microfluidics offers a promising avenue for advanced sperm isolation.

Purpose of the Study:

  • To evaluate a novel microfluidic device for isolating rheotactic sperm.
  • To compare the efficacy of this device against a passive microfluidic device and density gradient centrifugation.
  • To assess the impact of the microfluidic device on key sperm parameters.

Main Methods:

  • Two microfluidic devices (rheotaxis-based and passive) were employed.
  • Sperm separation was compared with density gradient centrifugation.
  • Sperm concentration, morphology, viability, and motility were analyzed.
  • Statistical analysis utilized one-way analysis of variance.

Main Results:

  • The designed microfluidic device yielded sperm with the highest motility and normal morphology.
  • Sperm vitality was also higher when using the novel microfluidic device.
  • Significantly lower sperm concentrations were observed with the microfluidic device.
  • Differences in sperm attributes were noted across all separation techniques.

Conclusions:

  • The novel microfluidic device demonstrates significant potential for enhancing sperm quality.
  • This technology excels in isolating highly motile sperm, crucial for fertilization.
  • Microfluidic approaches, particularly the designed device, show capability in improving sperm parameters.