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Published on: February 1, 2018
Programmed cell death during metamorphosis in the blow-fly Calliphora vomitoria
I D Bowen1, K Mullarkey, S M Morgan
1School of Pure and Applied Biology, University of Wales College Cardiff, United Kingdom.
Microscopy Research and Technique
|June 15, 1996
Summary
Blow-fly salivary glands undergo programmed cell death during metamorphosis. This process differs from classical apoptosis, showing cell swelling and autolysis rather than shrinkage and chromatin condensation.
Area of Science:
- Developmental Biology
- Cell Biology
- Insect Physiology
Background:
- Metamorphosis involves significant tissue remodeling in insects.
- Programmed cell death (PCD) is crucial for development.
- Classical apoptosis is a well-characterized form of PCD.
Purpose of the Study:
- To investigate the mechanism of programmed cell death in blow-fly salivary glands during metamorphosis.
- To compare this cell death pathway with classical apoptosis.
Main Methods:
- Morphological analysis of salivary gland cells during metamorphosis.
- Biochemical assays for enzyme activity (e.g., acid phosphatase).
- Comparison with experimentally induced necrosis.
Main Results:
- Salivary gland cell death involves vacuolation and swelling, not shrinkage.
- Transient enhancement of autophagy and increased acid phosphatase activity observed.
- Autolysis occurs via ribosomal and extracisternal enzyme sources without lysosomal leakage.
- Mitochondria persist, but nuclear changes differ from typical apoptosis.
- Distinct differences noted when compared to necrotic changes from anoxia.
Conclusions:
- Programmed cell death in blow-fly salivary glands during metamorphosis is a distinct pathway.
- This process does not fully emulate classical apoptosis.
- The findings reveal a unique mode of cell death in developmental contexts.
