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The mitochondrial DNA mutation (deltamtDNA5286) in human oocytes: correlation with age and IVF outcome
Vered Yesodi1, Yuval Yaron, Joseph B Lessing
1Sara Racine IVF Unit, LIS Maternity Hospital, Tel Aviv Sourasky Medical Center, Israel.
Purpose:
To evaluate the correlation between the presence of a newly described mitochondrial DNA (mtDNA) mutation (deltamtDNA5286), patients' age, and in vitro fertilization (IVF) outcomes.
Methods:
The presence of deltamtDNA5286 was analyzed by nested-primer PCR in 224 unfertilized oocytes of 81 women undergoing IVF for various reasons. Age, number of oocytes retrieved, fertilization and embryo cleavage, number of embryos transferred, and pregnancy rates were compared between patients with and without a mtDNA mutation in their oocytes.
Results:
The 23 patients in which deltamtDNA5286 was detected in at least one oocyte were significantly younger than the other 58 with no mutations (30.9 years vs. 33.8 years, respectively, P = 0.03), and had a significantly lower fertilization rate (28.9% vs. 42.1%, respectively, P = 0.01). No other outcome variable was significantly different between the two groups.
Conclusion(S):
The mtDNA mutation deltamtDNA5286 may serve as a marker of decreased oocyte quality in IVF.
Insights
The mitochondrial DNA (mtDNA) mutation deltamtDNA5286 was associated with younger patients undergoing in vitro fertilization (IVF). This mutation may indicate reduced oocyte quality, impacting IVF success rates.
Area of Science:
- Reproductive biology
- Genetics
- Mitochondrial DNA research
Background:
- Mitochondrial dysfunction is implicated in aging and reduced fertility.
- Specific mitochondrial DNA mutations may impact oocyte quality and fertilization outcomes.
- The deltamtDNA5286 mutation is a newly identified genetic factor in oocytes.
Purpose of the Study:
- To investigate the association between the deltamtDNA5286 mutation and patient age.
- To determine the correlation between the deltamtDNA5286 mutation and in vitro fertilization (IVF) success metrics.
- To evaluate the deltamtDNA5286 mutation as a potential biomarker for oocyte quality.
Main Methods:
- Nested-primer PCR was used to detect the deltamtDNA5286 mutation in 224 unfertilized oocytes from 81 women undergoing IVF.
- Patient age, oocyte retrieval numbers, fertilization and cleavage rates, embryo transfer data, and pregnancy rates were compared.
- Statistical analysis was performed to identify significant differences between groups with and without the mutation.
Main Results:
- The deltamtDNA5286 mutation was detected in 23 patients, who were significantly younger (30.9 years) than the 58 patients without the mutation (33.8 years; P = 0.03).
- Patients with the deltamtDNA5286 mutation exhibited a significantly lower fertilization rate (28.9%) compared to those without the mutation (42.1%; P = 0.01).
- No significant differences were observed in other measured IVF outcomes, including oocyte retrieval, embryo cleavage, embryo transfer, or pregnancy rates.
Conclusions:
- The presence of the deltamtDNA5286 mutation in oocytes is linked to younger patient age.
- The deltamtDNA5286 mutation may be a significant indicator of diminished oocyte quality.
- This mutation could serve as a predictive marker for reduced fertilization rates in IVF procedures.