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Related Experiment Videos

Apoptosis and lens vesicle development.

Y H Mohamed1, T Amemiya

  • 1Department of Ophthalmology and Visual Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Sakamoto, Nagasaki, Japan.

European Journal of Ophthalmology
|March 15, 2003
PubMed
Summary

Apoptosis plays a key role in rat lens vesicle development, eliminating cells to facilitate invagination and separation from the ectoderm. This programmed cell death is crucial for proper lens formation.

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Ophthalmology

Background:

  • Lens vesicle development is a complex process involving precise cellular events.
  • Apoptosis, or programmed cell death, is a fundamental biological mechanism.
  • Understanding cell fate during embryonic development is crucial for developmental biology.

Purpose of the Study:

  • To investigate the role of apoptosis in the development of the rat lens vesicle.
  • To correlate apoptotic changes with specific developmental stages of the lens vesicle.

Main Methods:

  • Utilized Wistar Kyoto rat fetuses from day 10-15 of gestation.
  • Employed TUNEL technique for DNA fragmentation analysis (apoptosis detection).
  • Used immunohistochemistry for macrophage staining and transmission electron microscopy (TEM) for ultrastructural examination.

Main Results:

  • Apoptotic changes and phagocytic cells were observed as early as day 11 of gestation, prior to lens invagination.
  • Apoptotic cells were identified at critical junctions, including the surface ectoderm, lens placode, and optic vesicle.
  • Macrophages were present in the extracellular space, aiding in the clearance of apoptotic cells during lens vesicle separation.

Conclusions:

  • Apoptosis is integral to lens vesicle development, from initial invagination to final separation.
  • Programmed cell death aids in eliminating cells between the ectoderm and optic vesicle, promoting invagination.
  • Apoptosis likely contributes to the morphogenetic shaping of the optic vesicle during lens formation.

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