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Superovulation Does Not Alter Calcium Oscillations Following Fertilization
Superovulation is a common approach to maximize the number of eggs available for either clinical assisted reproductive technologies or experimental animal studies. This procedure provides supraphysiological amounts of gonadotropins to promote continued growth and maturation of ovarian follicles that...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8601230/ https://www.ncbi.nlm.nih.gov/pubmed/34805168 http://dx.doi.org/10.3389/fcell.2021.762057 |
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author | Savy, Virginia Stein, Paula Shi, Min Williams, Carmen J. |
author_facet | Savy, Virginia Stein, Paula Shi, Min Williams, Carmen J. |
author_sort | Savy, Virginia |
collection | PubMed |
description | Superovulation is a common approach to maximize the number of eggs available for either clinical assisted reproductive technologies or experimental animal studies. This procedure provides supraphysiological amounts of gonadotropins to promote continued growth and maturation of ovarian follicles that otherwise would undergo atresia. There is evidence in mice, cows, sheep, and humans that superovulation has a detrimental impact on the quality of the resulting ovulated eggs or embryos. Here we tested the hypothesis that eggs derived from superovulation have a reduced capacity to support calcium oscillations, which are a critical factor in the success of embryo development. Eggs were obtained from mice that were either naturally cycling or underwent a standard superovulation protocol. The eggs were either parthenogenetically activated using strontium or fertilized in vitro while undergoing monitoring of calcium oscillatory patterns. Following parthenogenetic activation, superovulated eggs had a slightly delayed onset and longer duration of the first calcium transient, but no differences in oscillation persistence, frequency, or total calcium signal. However, in vitro fertilized superovulated eggs had no differences in any of these measures of calcium oscillatory behavior relative to spontaneously ovulated eggs. These findings indicate that although subtle differences in calcium signaling can be detected following parthenogenetic activation, superovulation does not disrupt physiological calcium signaling at fertilization, supporting the use of this method for both clinical and experimental purposes. |
format | Online Article Text |
id | pubmed-8601230 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-86012302021-11-19 Superovulation Does Not Alter Calcium Oscillations Following Fertilization Savy, Virginia Stein, Paula Shi, Min Williams, Carmen J. Front Cell Dev Biol Cell and Developmental Biology Superovulation is a common approach to maximize the number of eggs available for either clinical assisted reproductive technologies or experimental animal studies. This procedure provides supraphysiological amounts of gonadotropins to promote continued growth and maturation of ovarian follicles that otherwise would undergo atresia. There is evidence in mice, cows, sheep, and humans that superovulation has a detrimental impact on the quality of the resulting ovulated eggs or embryos. Here we tested the hypothesis that eggs derived from superovulation have a reduced capacity to support calcium oscillations, which are a critical factor in the success of embryo development. Eggs were obtained from mice that were either naturally cycling or underwent a standard superovulation protocol. The eggs were either parthenogenetically activated using strontium or fertilized in vitro while undergoing monitoring of calcium oscillatory patterns. Following parthenogenetic activation, superovulated eggs had a slightly delayed onset and longer duration of the first calcium transient, but no differences in oscillation persistence, frequency, or total calcium signal. However, in vitro fertilized superovulated eggs had no differences in any of these measures of calcium oscillatory behavior relative to spontaneously ovulated eggs. These findings indicate that although subtle differences in calcium signaling can be detected following parthenogenetic activation, superovulation does not disrupt physiological calcium signaling at fertilization, supporting the use of this method for both clinical and experimental purposes. Frontiers Media S.A. 2021-11-04 /pmc/articles/PMC8601230/ /pubmed/34805168 http://dx.doi.org/10.3389/fcell.2021.762057 Text en Copyright © 2021 Savy, Stein, Shi and Williams. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Cell and Developmental Biology Savy, Virginia Stein, Paula Shi, Min Williams, Carmen J. Superovulation Does Not Alter Calcium Oscillations Following Fertilization |
title | Superovulation Does Not Alter Calcium Oscillations Following Fertilization |
title_full | Superovulation Does Not Alter Calcium Oscillations Following Fertilization |
title_fullStr | Superovulation Does Not Alter Calcium Oscillations Following Fertilization |
title_full_unstemmed | Superovulation Does Not Alter Calcium Oscillations Following Fertilization |
title_short | Superovulation Does Not Alter Calcium Oscillations Following Fertilization |
title_sort | superovulation does not alter calcium oscillations following fertilization |
topic | Cell and Developmental Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8601230/ https://www.ncbi.nlm.nih.gov/pubmed/34805168 http://dx.doi.org/10.3389/fcell.2021.762057 |
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