Dissecting morphogenetic apoptosis through a genetic screen in Drosophila

Area of Science:

• Cell Biology
• Developmental Biology
• Genetics

Background:

• Apoptosis is crucial for development and disease, but its non-autonomous signaling remains poorly understood.
• Previous research focused on cell-autonomous apoptosis, neglecting signals from dying cells and their impact on surroundings.
• The morphogenetic apoptosis pathway, governing tissue shaping via cell death, requires further investigation.

Purpose of the Study:

• To identify novel genes regulating the non-autonomous aspects of apoptosis during morphogenesis.
• To investigate the role of apoptosis in tissue development using a genetic screen.
• To understand the signals involved in the morphogenetic apoptosis pathway.

Main Methods:

• Conducted an unbiased RNAi-based genetic screen in the *Drosophila* leg model system.
• Screened approximately 1,400 candidate genes.
• Utilized adult joint morphology, morphogenetic fold formation, and apoptotic patterns as key readouts.

Main Results:

• Identified 41 genes potentially involved in morphogenetic apoptosis.
• Discovered genes regulating the apoptotic process itself.
• Found genes associated with the formation, extrusion, and elimination of apoptotic bodies.
• Identified genes contributing to morphogenesis downstream of apoptosis.

Conclusions:

• The study elucidates key components of the morphogenetic apoptosis pathway.
• Identified genes offer new targets for understanding how apoptosis shapes tissues during development.
• This research expands knowledge of non-autonomous apoptosis signaling in developmental contexts.