Selection of Non Apoptotic Human Sperm for in Vitro Fertilization by Using Magnetic Activated Cell Sorting (MACS)

NCT ID: NCT03988361

Last Updated: 2019-06-21

Basic Information

• Recruitment Status: UNKNOWN
• Total Enrollment: 30 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2019-09-01
• Study Completion Date: 2021-10-01

Brief Summary

This clinical study has been organised to help improve the embryo quality in couples having high rate of sperm showing apoptotic signs. For this, the investigators intend to use a procedure (MACS: magnetic-activated cell sorting) that allows the identification and the removal of the apoptotic sperm cells. This procedure will increase the chance of using non-apoptotic sperm during in vitro fertilization via Intracytoplasmic Sperm Injection (ICSI). By using this procedure the investigators aim to increase the rate of embryos with good quality for these particular couples.

Detailed Description

Studies of infertile couples have demonstrated that male factor plays a role in infertility. Spermatozoa can present damages at molecular levels that have an effect on fertilization and embryo development. One of these molecular damages is represented by DeoxyriboNucleic Acid (DNA) fragmentation whose negative impact on embryological outcome appears during genome activation after fertilization and is also correlated with increased miscarriage rate.

DNA fragmentation represents one of the late manifestations of apoptosis. Identification of spermatozoa showing DNA fragmentation (apoptotic spermatozoa) requires fixation and staining. Therefore this method cannot be applied in clinical practice to select for non-apoptotic spermatozoa for ICSI. However, this selection is possible by using magnetic-activated cell sorting (MACS). The procedure is based on the identification and depletion of spermatozoa showing the early marker of apoptosis, namely the externalization of phosphatidylserine (PS), by using the ability of Annexin V to recognize this antigen in the plasma membrane of apoptotic sperm cells. After MACS, the fraction that is enriched in non-apoptotic cells (Annexin V-negative cells) can be further used for clinical application.

The MACS system makes use of a separation column placed in a magnetic field, and of Annexin-V reagent labeled with paramagnetic beads.

Initially, the semen sample will be subject to Density Gradient Centrifugation (DGC). The sample obtained will be divided in 2 fractions: one fraction will be subject to magnetic sorting (fraction 1) and the other fraction will represent the control (no sorting; fraction 2).

The cells from fraction 1 will be incubated with Annexin-V and then passed through the separation column located in a magnetic field. The apoptotic cells (Annexin V-positive cells) will be selectively retained in the column. The non-apoptotic cells, not being labeled by Annexin V, will pass through the column and will be collected for further use.

At the moment of ICSI, sibling mature oocytes will be inseminated with spermatozoa from fraction 1 (enriched in non-apoptotic cells) or from fraction 2 (control, conventionally prepared spermatozoa). Following ICSI, all the inseminated oocytes will be individually cultured in the same conditions in the same culture dish. The choice of embryo(s) for transfer will be based on embryo quality. The supernumerary good-quality embryos from both arms will be frozen for further use.

The present study aims to determine whether the use of MACS improves the embryo quality/utilization rate in couples with high sperm DNA fragmentation rate. To avoid inter-patient variation, the study is design as a sibling oocyte study. Descriptive statistics will be performed by analysing median, mean, proportions, standard deviation, ranges and 95% confidence intervals as appropriate. Standard parametric and non-parametric tests will be used, as appropriate, to compare primary and secondary outcomes between groups. Sample size calculation: a number of 142 mature oocytes in each arm will be necessary to achieve 80% power of detecting, as significant at the 5% level, an increase in the primary outcome measure from 13% in the control group to 26% in the experimental group.

Conditions

Infertility, Male

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

Control group

Half of the mature oocytes of the same patient will be injected with sperm obtained after DGC only (conventionally semen preparation).

No interventions assigned to this group

Study group

Half of the mature oocytes of the same patient will be injected with sperm obtained after DGC and MACS.

The sperm used in this group is considered to be enriched in non apoptotic cells.

Magnetic Activated Cell Sorting

Intervention Type: DIAGNOSTIC_TEST

At the moment of ICSI, sibling mature oocytes will be inseminated with spermatozoa from Study group or from Control group. Following ICSI, all the inseminated oocytes will be individually cultured in the same conditions in the same culture dish. The choice of embryo(s) for transfer will be based on embryo quality. The supernumerary good-quality embryos from both arms will be frozen for further use.

Interventions

Magnetic Activated Cell Sorting

At the moment of ICSI, sibling mature oocytes will be inseminated with spermatozoa from Study group or from Control group. Following ICSI, all the inseminated oocytes will be individually cultured in the same conditions in the same culture dish. The choice of embryo(s) for transfer will be based on embryo quality. The supernumerary good-quality embryos from both arms will be frozen for further use.

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Patients with poor embryo quality in the previous cycles:

• Cycles with no embryo transfer due to insufficient embryo quality
• "Freeze all" cycles without cryopreservation
• Cycles with transfer of embryos with fair and/or poor quality
• Previous diagnostic semen analysis with minimum 30% DNA fragmentation
• ICSI cycles with fresh ejaculated semen with ≥1 mil spermatozoa after DGC.
• Minimum 6 mature oocytes after oocyte pick up.

Exclusion Criteria

• Cycles with frozen semen sample
• Cycles with testicular sample
• In vitro fertilization (IVF) cycles
• Cycles with pre-implantation genetic diagnosis
• In vitro maturation cycles

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 43 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Universitair Ziekenhuis Brussel

OTHER

Sponsor Role: lead

Responsible Party

Ileana Mateizel

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Central Contacts

Ileana Mateizel, PhD

Role: CONTACT

ileana.mateizel@uzbrussel.be

003224749119

Elsie Nulens

Role: CONTACT

elsie.nulens@uzbrussel.be

003228012676

Other Identifiers

2018-183

Identifier Type: -

Identifier Source: org_study_id