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Updated: Jun 8, 2026

Measuring Caspase Activity Using a Fluorometric Assay or Flow Cytometry
Published on: March 24, 2023
Swords of cell death: caspase activation and regulation
Faris Q Alenzi1, Mahmoud Lotfy, Richard Wyse
1Department of Med. Lab. Sci., College of Appl. Med. Sci., Al-Kharj University, Al-Kharj, Saudi Arabia. fqalenzi@ksu.edu.sa
Abstract:
Apoptosis represents a crucial process in modulating organ development in the embryo, in organ homeostasis in the adult, and in fostering appropriate immunological function. Caspases represent two central classes of molecules that are either involved with the stimulation of the apoptotic cascade (initiator caspases), or the various sequential biological pathways required for its execution (effector caspases). With an eye towards therapeutic opportunities, this review discusses in detail the lineage of initiator and effector caspases, how they are each activated, their substrates, their regulation, and maps out how they interact throughout the process from initiation of the first apoptotic signal to the final consequential breakdown of cellular integrity.
Insights
This review details initiator and effector caspases, crucial for apoptosis, cell death, and immune function. Understanding their activation, substrates, and interactions offers therapeutic potential.
Area of Science:
- Cellular Biology
- Biochemistry
Background:
- Apoptosis is vital for embryonic development, adult homeostasis, and immune function.
- Caspases are key molecular players, categorized as initiator or effector types.
Purpose of the Study:
- To review the lineage, activation, substrates, regulation, and interactions of initiator and effector caspases.
- To explore therapeutic opportunities related to caspase pathways.
Main Methods:
- Literature review of caspase research.
- Detailed analysis of caspase activation mechanisms and substrates.
- Mapping of caspase interactions in the apoptotic cascade.
Main Results:
- Initiator caspases trigger apoptosis; effector caspases execute it.
- Detailed understanding of caspase activation, substrate specificity, and regulatory networks.
- Interactions map from initial apoptotic signal to cellular breakdown.
Conclusions:
- Caspases are central to apoptosis and cellular integrity.
- Insights into caspase pathways offer significant therapeutic avenues.
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