In vitro matured oocytes are more susceptible than in vivo matured oocytes to mock ICSI induced functional and genetic changes

Concerns regarding the safety of ICSI have been intensified recently due to increased risk of birth defects in ICSI born children. Although fertilization rate is significantly higher in ICSI cycles, studies have failed to demonstrate the benefits of ICSI in improving the pregnancy rate. Poor technic...

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Veröffentlicht in:PloS one 2015-03, Vol.10 (3), p.e0119735-e0119735
Hauptverfasser: Uppangala, Shubhashree, Dhiman, Shilly, Salian, Sujit Raj, Singh, Vikram Jeet, Kalthur, Guruprasad, Adiga, Satish Kumar
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container_title PloS one
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creator Uppangala, Shubhashree
Dhiman, Shilly
Salian, Sujit Raj
Singh, Vikram Jeet
Kalthur, Guruprasad
Adiga, Satish Kumar
description Concerns regarding the safety of ICSI have been intensified recently due to increased risk of birth defects in ICSI born children. Although fertilization rate is significantly higher in ICSI cycles, studies have failed to demonstrate the benefits of ICSI in improving the pregnancy rate. Poor technical skill, and suboptimal in vitro conditions may account for the ICSI results however, there is no report on the effects of oocyte manipulations on the ICSI outcome. The present study elucidates the influence of mock ICSI on the functional and genetic integrity of the mouse oocytes. Reactive Oxygen Species (ROS) level, mitochondrial status, and phosphorylation of H2AX were assessed in the in vivo matured and IVM oocytes subjected to mock ICSI. A significant increase in ROS level was observed in both in vivo matured and IVM oocytes subjected to mock ICSI (P
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Although fertilization rate is significantly higher in ICSI cycles, studies have failed to demonstrate the benefits of ICSI in improving the pregnancy rate. Poor technical skill, and suboptimal in vitro conditions may account for the ICSI results however, there is no report on the effects of oocyte manipulations on the ICSI outcome. The present study elucidates the influence of mock ICSI on the functional and genetic integrity of the mouse oocytes. Reactive Oxygen Species (ROS) level, mitochondrial status, and phosphorylation of H2AX were assessed in the in vivo matured and IVM oocytes subjected to mock ICSI. A significant increase in ROS level was observed in both in vivo matured and IVM oocytes subjected to mock ICSI (P&lt;0.05-0.001) whereas unique mitochondrial distribution pattern was found only in IVM oocytes (P&lt;0.01-0.001). Importantly, differential H2AX phosphorylation was observed in both in vivo matured and IVM oocytes subjected to mock ICSI (P &lt;0.001). 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subjects Animals
Birth defects
Children
Congenital defects
Deoxyribonucleic acid
DNA
Embryology
Female
Fertilization
Gynecology
Histones - metabolism
In Vitro Techniques - methods
Integrity
Mammals
Mice
Mitochondria
Mitochondria - physiology
Obstetrics
Oocytes
Oocytes - metabolism
Oocytes - physiology
Oxygen
Phosphorylation
Pregnancy
Reactive oxygen species
Reactive Oxygen Species - metabolism
Risk factors
Sperm
Sperm Injections, Intracytoplasmic - adverse effects
Statistics, Nonparametric
title In vitro matured oocytes are more susceptible than in vivo matured oocytes to mock ICSI induced functional and genetic changes
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