scholarly journals Advanced maternal age alters expression of maternal effect genes that are essential for human oocyte quality

Aging ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 3950-3961 ◽  
Author(s):  
Jing-Jing Zhang ◽  
Xiaoyan Liu ◽  
Li Chen ◽  
Shouxin Zhang ◽  
Xia Zhang ◽  
...  
Keyword(s):  
Maternal Effect ◽  
Maternal Age ◽  
Advanced Maternal Age ◽  
Oocyte Quality ◽  
Human Oocyte ◽  
Maternal Effect Genes

Mitochondrial SIRT5 is present in follicular cells and is altered by reduced ovarian reserve and advanced maternal age

2014 ◽  
Vol 26 (8) ◽  
pp. 1072 ◽  
Author(s):  
Leanne Pacella-Ince ◽  
Deirdre L. Zander-Fox ◽  
Michelle Lane
Keyword(s):  
Follicular Fluid ◽  
Ovarian Reserve ◽  
Protein Function ◽  
Maternal Age ◽  
Cumulus Cells ◽  
Advanced Maternal Age ◽  
Oocyte Quality ◽  
Carbamoyl Phosphate ◽  
Protein Activity

Women with reduced ovarian reserve or advanced maternal age have an altered metabolic follicular microenvironment. As sirtuin 5 (SIRT5) senses cellular metabolic state and post-translationally alters protein function, its activity may directly impact on oocyte viability and pregnancy outcome. Therefore, we investigated the role of SIRT5 in relation to ovarian reserve and maternal age. Women (n = 47) undergoing routine IVF treatment were recruited and allocated to one of three cohorts based on ovarian reserve and maternal age. Surplus follicular fluid, granulosa and cumulus cells were collected. SIRT5 mRNA, protein and protein activity was confirmed in granulosa and cumulus cells via qPCR, immunohistochemistry, western blotting and desuccinylation activity. The presence of carbamoyl phosphate synthase I (CPS1), a target of SIRT5, was investigated by immunohistochemistry and follicular-fluid ammonium concentrations determined via microfluorometry. Women with reduced ovarian reserve or advanced maternal age had decreased SIRT5 mRNA, protein and desuccinylation activity in granulosa and cumulus cells resulting in an accumulation of follicular-fluid ammonium, presumably via alterations in activity of a SIRT5 target, CPS1, which was present in granulosa and cumulus cells. This suggests a role for SIRT5 in influencing oocyte quality and IVF outcomes.

scholarly journals Sirt2-BubR1 acetylation pathway mediates the effects of advanced maternal age on oocyte quality

Aging Cell ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. e12698 ◽  
Author(s):  
Danhong Qiu ◽  
Xiaojing Hou ◽  
Longsen Han ◽  
Xiaoyan Li ◽  
Juan Ge ◽  
...  
Keyword(s):  
Maternal Age ◽  
Advanced Maternal Age ◽  
Oocyte Quality

The maternal age effect: a hypothesis based on oxidative phosphorylation

Zygote ◽  
2005 ◽  
Vol 13 (4) ◽  
pp. 317-323 ◽  
Author(s):  
Martin Wilding ◽  
Loredana Di Matteo ◽  
Brian Dale
Keyword(s):  
Oxidative Phosphorylation ◽  
Maternal Age ◽  
Negative Relationship ◽  
Anaerobic Respiration ◽  
Oocyte Quality ◽  
Age Effect ◽  
Current Data ◽  
Human Reproduction ◽  
Human Oocyte ◽  
Maternal Age Effect

The ‘maternal age effect’ in human reproduction, characterized by a negative relationship between maternal age and reproductive efficiency, remains a poorly understood phenomenon. Current data suggest that oocyte physiology determines this relationship. In this review, we present a hypothesis of a mitochondrial role in the physiology of ageing in human oocytes. We suggest that the efficiency of oxidative phosphorylation in the ageing human oocyte is degraded by free radical attack on the primordial oocytes residing in the ovary. Although deficiencies in oxidative phosphorylation can be accounted for in the short term by anaerobic respiration, we suggest that, in the long term, the level of oxidative phosphorylation strongly influences oocyte quality.

scholarly journals Maternal control of early embryogenesis in mammals

2015 ◽  
Vol 27 (6) ◽  
pp. 880 ◽  
Author(s):  
Kun Zhang ◽  
George W. Smith
Keyword(s):  
Maternal Effect ◽  
Oocyte Quality ◽  
Farm Animals ◽  
Maternal Control ◽  
Close Link ◽  
Embryonic Genome Activation ◽  
Ovarian Aging ◽  
Embryonic Genome ◽  
Maternal Effect Genes ◽  
Genome Activation

Oocyte quality is a critical factor limiting the efficiency of assisted reproductive technologies (ART) and pregnancy success in farm animals and humans. ART success is diminished with increased maternal age, suggesting a close link between poor oocyte quality and ovarian aging. However, the regulation of oocyte quality remains poorly understood. Oocyte quality is functionally linked to ART success because the maternal-to-embryonic transition (MET) is dependent on stored maternal factors, which are accumulated in oocytes during oocyte development and growth. The MET consists of critical developmental processes, including maternal RNA depletion and embryonic genome activation. In recent years, key maternal proteins encoded by maternal-effect genes have been determined, primarily using genetically modified mouse models. These proteins are implicated in various aspects of early embryonic development, including maternal mRNA degradation, epigenetic reprogramming, signal transduction, protein translation and initiation of embryonic genome activation. Species differences exist in the number of cell divisions encompassing the MET and maternal-effect genes controlling this developmental window. Perturbations of maternal control, some of which are associated with ovarian aging, result in decreased oocyte quality.

Advanced Maternal Age and Adverse Maternal and Neonatal Outcomes in Pregnant Women

2020 ◽  
Vol 16 ◽  
Author(s):  
Reza Omani-Samani ◽  
Saman Maroufizadeh ◽  
Nafise Saedi ◽  
Nasim Shokouhi ◽  
Arezoo Esmailzadeh ◽  
...  
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Low Birth Weight ◽  
Cesarean Section ◽  
Pregnant Women ◽  
Maternal Age ◽  
Unwanted Pregnancy ◽  
Advanced Maternal Age ◽  
Neonatal Outcomes ◽  
Maternal And Neonatal Outcomes

Background: Advanced maternal age is an important predictor for maternal and neonatal outcomes such as maternal mortality, low birth weight, stillbirth, preterm birth, cesarean section and preeclampsia. Objective: To determine the association of advanced maternal age and adverse maternal and neonatal outcomes in Iranian pregnant women. Methods: In this hospital-based cross-sectional study, 5117 pregnant women from 103 hospitals in Tehran, Iran, were participated in the study in 2015. The required data were gathered from hospitals which equipped to the department of obstetrics and gynecology. Advanced maternal age was considered as an independent variable and unwanted pregnancy, preeclampsia, preterm birth, cesarean section and low birth weight were considered as interested outcomes. Results: In our study, the prevalence of advanced maternal age was 12.08%. Advanced maternal age was significantly associated with higher risk of unwanted pregnancy (OR: 1.39, 95% CI: 1.12-1.73), preterm birth (OR: 1.75, 95% CI: 1.28- 2.39) and cesarean section (OR: 1.34, 95% CI: 1.03-1.74). In our study, there was no significant relationship between advanced maternal age and preeclampsia but this relationship could be clinically important (OR: 1.48, 95% CI: 0.99-2.20, P=0.052), and there is no significant relationship between advanced maternal age and low birth weight (OR: 1.08, 95% CI: 0.67-1.74, P=0.736). Conclusion: Advanced maternal age is associated with higher risk of unintended pregnancy, preterm birth and cesarean section but our findings did not support advanced maternal age as a risk factor associated with low birth weight.

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