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CENP-V As a Potential Diagnostic Marker of Damage in Human Oocytes

NCT06788379 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 160

Last updated 2025-01-23

No results posted yet for this study

Summary

Proper chromosome segregation is essential to avoid aneuploidy, yet in mammalian oocytes it progressively fails in an age-dependent manner. The ageing population and the increasing age of parenthood are leading to a declined fertility. Proteins contributing to correct chromosome segregation and oocyte ageing are therefore of central interest. Mouse oocytes deficient in CENP-V are strongly impaired in meiosis I. The spindle assembly checkpoint (SAC)-dependent arrest of about half of the Cenp-V -/- oocytes at metaphase I is only found in oocytes from young adults, not in oocytes \>12 months. This suggests SAC weakening in ageing oocytes allowing them to proceed despite continuous presence of mis-aligned chromosomes and present CENP-V depleted oocytes as a model for age dependent weakening of the SAC. Sporadic cases of very-low oocyte survival rate have been observed after vitrification and thawing protocols in the clinical practice. However, no diagnostic tools are currently available to detect these cases. The relevance of this problem has led to a demand on the scientific community to obtain specific and early biomarkers to predict decreased oocyte survival rates after thawing. The main goal of this project is to establish the expression levels of the CENP-V protein in human oocytes as a diagnostic tool for the aging of a cohort of oocytes. With this purpose, the immature oocytes from the oocytes cohort recovered from women with advanced maternal age (AMA) and control, will be matured in vitro in order to compare the CENP-V expression levels between both populations. In addition, in patients with AMA, these expression levels will be correlated with the aneuploidy rate from the blastocyst of the same oocyte cohort. CENP-V-deleted mouse oocytes show higher rate of aneuploidy and spindle aberrations after cold treatment compared to control oocytes. We hypothesize that alterations in the expression level of CENP-V could be responsible of the decrease in oocyte survival rate after thawing. The main objective of this project is to establish the expression levels of the CENP-V protein in human oocytes as a diagnostic tool to assess the damage of a cohort of oocytes. For this purpose, oocytes retrieved from advanced maternal age (AMA) and control patients, as well as oocytes undergoing vitrification / thawing procedures and controls oocytes, will be analyzed. In this study, only the immature oocytes of the patients, which are destined to be discarded and not used in their treatment, will be analyzed.

Conditions

  • Establish the Amount of CENPV Protein in Human Oocytes As a Diagnostic Tool Against Damage Caused by Ageing or by the Procedure of Vitrification of Oocytes
  • Advance Maternal Age
  • Vitrification and Thawing

Sponsors & Collaborators

  • University of Seville, Spain

    collaborator UNKNOWN

  • Vida Recoletas Sevilla

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
45 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2024-10-04
Primary Completion
2026-06-30
Completion
2026-12-31

Countries

  • Spain

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06788379 on ClinicalTrials.gov