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Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos
Published on: February 22, 2016
Functional analysis of lysosomes during mouse preimplantation embryo development
Satoshi Tsukamoto1, Taichi Hara, Atsushi Yamamoto
1Laboratory Animal and Genome Sciences Section, National Institute of Radiological Sciences, Chiba 263-8555, Japan. s_tsuka@nirs.go.jp
The Journal of Reproduction and Development
|October 20, 2012
Summary
Lysosomes are crucial for early mouse embryo development, with their numbers and activity peaking at the morula stage. Disrupting lysosome function halts embryo progression, underscoring their essential role.
Area of Science:
- Cell Biology
- Developmental Biology
- Embryology
Background:
- Lysosomes are vital acidic organelles involved in cellular degradation and function.
- Lysosomal roles during early embryogenesis remain largely uncharacterized.
Purpose of the Study:
- To investigate lysosome dynamics and function during mouse preimplantation development.
- To determine the impact of lysosome dysfunction on early embryonic progression.
Main Methods:
- Quantification of lysosome numbers and cathepsin expression in mouse embryos.
- Inhibition of lysosome function using siRNA targeting LAMP1/LAMP2 and pharmacological agents.
Main Results:
- Lysosome numbers increase post-fertilization, peaking at the morula stage and decreasing in blastocysts.
- High expression of mature cathepsins B and D observed until the morula stage.
- Lysosome inhibition via siRNA or drugs caused developmental arrest at the two-cell stage and lipofuscin accumulation.
Conclusions:
- Lysosomes undergo significant functional changes during mouse preimplantation development.
- Lysosomal function is essential for successful progression through early embryogenesis.
- Dysfunctional lysosomes lead to developmental arrest and cellular pathology in early embryos.
