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Comparative Proteomic Analysis of Buffalo Oocytes Matured in vitro Using iTRAQ Technique
Lingsheng Chen1,2, Linhui Zhai2,3, Chunfeng Qu1,4
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning 530005, China.
Scientific Reports
|August 27, 2016
Summary
This study identified thousands of proteins in buffalo oocytes, revealing key differences between immature and mature stages. These findings offer potential biomarkers for predicting oocyte developmental competence.
Area of Science:
- Reproductive biology
- Proteomics
- Mammalian oocyte development
Background:
- Buffalo oocyte maturation is crucial for reproductive success.
- Understanding the molecular changes during oocyte maturation is essential for improving assisted reproductive technologies.
- Limited proteomic data exists for buffalo oocytes at different developmental stages.
Purpose of the Study:
- To perform comprehensive protein profiling of buffalo oocytes at germinal vesicle (GV) and metaphase II (MII) stages.
- To identify differentially expressed proteins between GV and MII oocytes, and between competent and incompetent MII oocytes.
- To elucidate the molecular mechanisms underlying buffalo oocyte maturation and identify potential biomarkers for developmental competence.
Main Methods:
- An iTRAQ (isobaric tag for relative and absolute quantitation)-based proteomic strategy was employed.
- Mass spectrometry was used for protein identification and quantification.
- Bioinformatic analyses, including functional annotation and KEGG pathway analysis, were performed.
Main Results:
- A total of 3,763 proteins were identified, creating the largest buffalo oocyte proteome dataset to date.
- 173 proteins were differentially expressed between GV and competent MII oocytes.
- 146 proteins were differentially abundant between competent and incompetent MII oocytes.
- Up-regulated proteins in competent MII oocytes were associated with chromosome segregation, microtubule-based processes, protein transport, oxidation-reduction, ribosome function, and oxidative phosphorylation.
Conclusions:
- This study provides the first proteomic analysis of buffalo oocytes across different maturation stages and developmental competence.
- The identified differentially expressed proteins offer insights into the molecular regulation of buffalo oocyte maturation.
- These proteins may serve as potential biomarkers for predicting the developmental competence of buffalo oocytes during in vitro maturation.
