Abstract
Purpose
Sperm quality plays a vital role in successful fertilization and pregnancy. Patients with fertilization failure (total failure or low-fertilization rate) despite having normal semen parameters are a challenging group whose sperm cannot fertilize the oocyte via the intracytoplasmic sperm injection (ICSI) technique. Microfluidics is offered as a new method for proper sperm sorting.
Methods
This study aimed to evaluate sperm parameters, DNA fragmentation index (DFI), expression of phospholipase C zeta 1 (PLCZ1), and transition nuclear proteins 1 (TNP1) mRNAs in sperm selected by microfluidic sperm sorting (MSS) chip compared with conventional density gradient centrifugation technique in patients with fertilization failure following ICSI. Subsequence fertilization rate and embryo quality were assayed.
Results
Normal morphology and total motility were significantly higher, and DFI was significantly lower in sperm selected by the MSS chip in fertilization failure and control groups. The RT-PCR results demonstrated a significant increase in the expression of PLCZ1 and TNP1 genes in sperm of both groups selected by MSS chips compared to the DGC method. In addition, with the selected sperm by MSS chip, an increase in fertilization rate and improvement of embryo quality was obtained.
Conclusion
The present study findings show that sperm sorting by the microfluidic method improves fertilization rate in patients with poor fertilization outcomes following ICSI.
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Funding
This work was supported by the Iran University of Medical Sciences under Grant (number 13580).
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FA contributed to the design of the study, acquisition, revision and gave input at all stages of the study. JSM, ZZ, MM, RA, MST and ASM took part in collection and analysis of data. NS contributed to drafting the article and critical discussion. All the authors read and approved the final manuscript.
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The authors have no relevant financial or non-financial interests to disclose.
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The present study was approved by the Ethics Committee of Iran University of Medical Sciences (IR.IUMS.FMD.REC.1398.179).
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All the participants provided written informed consent before sample collection.
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Mirsanei, J.S., Sheibak, N., Zandieh, Z. et al. Microfluidic chips as a method for sperm selection improve fertilization rate in couples with fertilization failure. Arch Gynecol Obstet 306, 901–910 (2022). https://doi.org/10.1007/s00404-022-06618-w
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DOI: https://doi.org/10.1007/s00404-022-06618-w