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Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis
Characterizing the mechanisms underlying follicle development in the ovary is crucial to understanding female fertility and is an area of increasing research interest. The RNA binding protein Musashi is essential for post-transcriptional regulation of oocyte maturation in Xenopus and is expressed du...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598749/ https://www.ncbi.nlm.nih.gov/pubmed/26131972 http://dx.doi.org/10.3390/biom5031228 |
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author | Sutherland, Jessie M. Sobinoff, Alexander P. Gunter, Kara M. Fraser, Barbara A. Pye, Victoria Bernstein, Ilana R. Boon, Evan Siddall, Nicole A. De Andres, Luisa I. Hime, Gary R. Holt, Janet E. Graf, Thomas McLaughlin, Eileen A. |
author_facet | Sutherland, Jessie M. Sobinoff, Alexander P. Gunter, Kara M. Fraser, Barbara A. Pye, Victoria Bernstein, Ilana R. Boon, Evan Siddall, Nicole A. De Andres, Luisa I. Hime, Gary R. Holt, Janet E. Graf, Thomas McLaughlin, Eileen A. |
author_sort | Sutherland, Jessie M. |
collection | PubMed |
description | Characterizing the mechanisms underlying follicle development in the ovary is crucial to understanding female fertility and is an area of increasing research interest. The RNA binding protein Musashi is essential for post-transcriptional regulation of oocyte maturation in Xenopus and is expressed during ovarian development in Drosophila. In mammals Musashi is important for spermatogenesis and male fertility, but its role in the ovary has yet to be characterized. In this study we determined the expression of mammalian Musashi proteins MSI1 and MSI2 during mouse folliculogenesis, and through the use of a MSI2-specific knockout mouse model we identified that MSI2 is essential for normal follicle development. Time-course characterization of MSI1 and MSI2 revealed distinct differences in steady-state mRNA levels and protein expression/localization at important developmental time-points during folliculogenesis. Using a gene-trap mouse model that inactivates Msi2, we observed a significant decrease in ovarian mass, and change in follicle-stage composition due to developmental blocking of antral stage follicles and pre-antral follicle loss through atresia. We also confirmed that hormonally stimulated Msi2-deficient mice produce significantly fewer MII oocytes (60.9% less than controls, p < 0.05). Furthermore, the majority of these oocytes are of poor viability (62.2% non-viable/apoptotic, p < 0.05), which causes a reduction in female fertility evidenced by decreased litter size in Msi2-deficient animals (33.1% reduction to controls, p < 0.05). Our findings indicate that MSI1 and MSI2 display distinct expression profiles during mammalian folliculogenesis and that MSI2 is required for pre-antral follicle development. |
format | Online Article Text |
id | pubmed-4598749 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-45987492015-10-15 Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis Sutherland, Jessie M. Sobinoff, Alexander P. Gunter, Kara M. Fraser, Barbara A. Pye, Victoria Bernstein, Ilana R. Boon, Evan Siddall, Nicole A. De Andres, Luisa I. Hime, Gary R. Holt, Janet E. Graf, Thomas McLaughlin, Eileen A. Biomolecules Article Characterizing the mechanisms underlying follicle development in the ovary is crucial to understanding female fertility and is an area of increasing research interest. The RNA binding protein Musashi is essential for post-transcriptional regulation of oocyte maturation in Xenopus and is expressed during ovarian development in Drosophila. In mammals Musashi is important for spermatogenesis and male fertility, but its role in the ovary has yet to be characterized. In this study we determined the expression of mammalian Musashi proteins MSI1 and MSI2 during mouse folliculogenesis, and through the use of a MSI2-specific knockout mouse model we identified that MSI2 is essential for normal follicle development. Time-course characterization of MSI1 and MSI2 revealed distinct differences in steady-state mRNA levels and protein expression/localization at important developmental time-points during folliculogenesis. Using a gene-trap mouse model that inactivates Msi2, we observed a significant decrease in ovarian mass, and change in follicle-stage composition due to developmental blocking of antral stage follicles and pre-antral follicle loss through atresia. We also confirmed that hormonally stimulated Msi2-deficient mice produce significantly fewer MII oocytes (60.9% less than controls, p < 0.05). Furthermore, the majority of these oocytes are of poor viability (62.2% non-viable/apoptotic, p < 0.05), which causes a reduction in female fertility evidenced by decreased litter size in Msi2-deficient animals (33.1% reduction to controls, p < 0.05). Our findings indicate that MSI1 and MSI2 display distinct expression profiles during mammalian folliculogenesis and that MSI2 is required for pre-antral follicle development. MDPI 2015-06-26 /pmc/articles/PMC4598749/ /pubmed/26131972 http://dx.doi.org/10.3390/biom5031228 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Sutherland, Jessie M. Sobinoff, Alexander P. Gunter, Kara M. Fraser, Barbara A. Pye, Victoria Bernstein, Ilana R. Boon, Evan Siddall, Nicole A. De Andres, Luisa I. Hime, Gary R. Holt, Janet E. Graf, Thomas McLaughlin, Eileen A. Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis |
title | Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis |
title_full | Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis |
title_fullStr | Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis |
title_full_unstemmed | Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis |
title_short | Knockout of RNA Binding Protein MSI2 Impairs Follicle Development in the Mouse Ovary: Characterization of MSI1 and MSI2 during Folliculogenesis |
title_sort | knockout of rna binding protein msi2 impairs follicle development in the mouse ovary: characterization of msi1 and msi2 during folliculogenesis |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598749/ https://www.ncbi.nlm.nih.gov/pubmed/26131972 http://dx.doi.org/10.3390/biom5031228 |
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