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Use of LysoTracker to Detect Programmed Cell Death in Embryos and Differentiating Embryonic Stem Cells
Published on: October 11, 2012
The role of apoptosis in normal and abnormal embryonic development
A Brill1, A Torchinsky, H Carp
1Department of Embryology and Teratology, Sackler School of Medicine, Tel Aviv University, Israel.
Abstract:
Programmed cell death or apoptosis is a widespread biological phenomenon. Apoptosis is characterized by typical cell features such as membrane blebbing, chromatin condensation, and DNA fragmentation. It involves a number of membrane receptors (e.g., Fas, TNFR) and a cascade of signal transduction steps resulting in the activation of a number of cysteine proteases known as caspases. Disordered apoptosis may lead to carcinogenesis and participates in the pathogenesis of Alzheimer disease, Parkinson disease, or AIDS. Programmed cell death plays an important role in the processes of gamete maturation as well as in embryo development, contributing to the appropriate formation of various organs and structures. Apoptosis is one of the mechanisms of action of various cytotoxic agents and teratogens. Teratogen-induced excessive death of embryonic cells is undoubtedly one of the most important events preceding the occurrence of structural abnormalities, regardless of their nature. Therefore understanding the mechanisms involved in physiological as well as in disturbed or dysregulated apoptosis may lead to the development of new methods of preventive treatment of various developmental abnormalities. The present review summarizes data on the mechanisms of programmed cell death and concentrates on apoptosis involved in normal or disturbed gametogenesis and in normal and abnormal embryonic development.
Insights
Programmed cell death, or apoptosis, is vital for development and health. Dysregulated apoptosis contributes to diseases and birth defects, highlighting the need for understanding its mechanisms.
Area of Science:
- Cell Biology
- Developmental Biology
- Pathology
Background:
- Apoptosis, a form of programmed cell death, is characterized by distinct cellular changes like membrane blebbing and DNA fragmentation.
- This process involves membrane receptors and caspase activation, crucial for normal physiological functions.
- Disruptions in apoptosis are implicated in diseases such as cancer, Alzheimer's, Parkinson's, and AIDS.
Purpose of the Study:
- To review the mechanisms of programmed cell death, focusing on apoptosis.
- To concentrate on the role of apoptosis in normal and disturbed gametogenesis.
- To examine apoptosis in both normal and abnormal embryonic development.
Main Methods:
- Literature review of programmed cell death mechanisms.
- Analysis of apoptosis in gamete maturation and embryonic development.
- Examination of dysregulated apoptosis in developmental abnormalities.
Main Results:
- Apoptosis is essential for gamete maturation and proper embryonic development, including organ formation.
- Excessive embryonic cell death induced by teratogens is a key factor in structural abnormalities.
- Understanding apoptosis mechanisms is crucial for developing preventive treatments for developmental disorders.
Conclusions:
- Apoptosis plays a critical role in reproductive biology and embryogenesis.
- Dysregulation of apoptosis can lead to severe developmental abnormalities and diseases.
- Further research into apoptosis mechanisms may yield novel therapeutic strategies for preventing birth defects and treating related diseases.
Related Concept Videos
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Cellular Injury V: Apoptosis and Autophagy
Caspases
The Extrinsic Apoptotic Pathway
Teratogenicity
The Intrinsic Apoptotic Pathway

