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A microfluidic sperm-sorting device reduces the proportion of sperm with double-stranded DNA fragmentation

Published online by Cambridge University Press:  27 July 2021

A. Pujol ,
A. García-Peiró ,
J. Ribas-Maynou ,
R. Lafuente ,
D. Mataró  and
R. Vassena Open the ORCID record for R. Vassena [Opens in a new window]
A. Pujol
Affiliation:
Centro de Infertilidad y Reproducción Humana (CIRH)-Eugin Group, Plaça Eguilaz 14, Barcelona 08017, Spain
A. García-Peiró
Affiliation:
CIMAB, C/ Vallcorba1A-3A, Sant Quirze del Valles 08195, Spain
J. Ribas-Maynou
Affiliation:
CIMAB, C/ Vallcorba1A-3A, Sant Quirze del Valles 08195, Spain
R. Lafuente
Affiliation:
Centro de Infertilidad y Reproducción Humana (CIRH)-Eugin Group, Plaça Eguilaz 14, Barcelona 08017, Spain
D. Mataró
Affiliation:
Centro de Infertilidad y Reproducción Humana (CIRH)-Eugin Group, Plaça Eguilaz 14, Barcelona 08017, Spain
R. Vassena*
Affiliation:
Clínica EUGIN-Eugin Group, C/ Balmes 236, Barcelona 08029, Spain
*
Author for correspondence: R. Vassena. Clínica EUGIN-Eugin Group, C/ Balmes 236, Barcelona 08029, Spain. E-mail: rvassena@eugin.es
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Summary

Sperm DNA fragmentation can be produced in one (ssSDF) or both (dsSDF) DNA strands, linked to difficulties in naturally achieving a pregnancy and recurrent miscarriages, respectively. The techniques more frequently used to select sperm require centrifugation, which may induce sperm DNA fragmentation (SDF). The objective of this study was to assess whether the microfluidic-based device FertileChip® (now ZyMot®ICSI) can diminish the proportion of sperm with dsSDF. First, in a blinded split pilot study, the semen of nine patients diagnosed with ≥60% dsSDF, was divided into three aliquots: not processed, processed with FertileChip®, and processed with swim up. The three aliquots were all analyzed using neutral COMET for the detection of dsSDF, resulting in a reduction of 46% (P < 0.001) with FertileChip® (dsSDF: 34.9%) compared with the ejaculate and the swim up (dsSDF: 65%). Thereafter, the FertileChip® was introduced into clinical practice and a cohort of 163 consecutive ICSI cycles of patients diagnosed with ≥60% dsSDF was analyzed. Fertilization rate was 75.41%. Pregnancy rates after the first embryo transfer were 53.2% (biochemical), 37.8% (clinical), 34% (ongoing) and the live birth rate was 28.8%. Cumulative pregnancy rates after one (65.4% of patients), two (27.6% of patients) or three (6.4% of patients) transfers were 66% (biochemical), 56.4% (clinical), 53.4% (ongoing) and the live birth rate was 42%. The selection of spermatozoa using Fertile Chip® significantly diminishes the percentage of dsSDF, compared with either the fresh ejaculate or after swim up. Its applicability in ICSI cycles of patients with high dsSDF resulted in good laboratory and clinical outcomes.

Keywords

DNA fragmentationMicrofluidicsMiscarriageSpermSwim up
Type
Research Article
Information
Zygote , Volume 30 , Issue 2 , April 2022 , pp. 200 - 205
Copyright
© The Author(s), 2021. Published by Cambridge University Press

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