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Updated: Jul 8, 2026

Lighting Up the Pathways to Caspase Activation Using Bimolecular Fluorescence Complementation
Published on: March 5, 2018
Caspase activation cascades in apoptosis
Susan E Logue1, Seamus J Martin
1Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College, Dublin 2, Ireland.
Abstract:
Apoptosis, a highly controlled mode of cell death, is utilized to eliminate superfluous, aged, injured or infected cells from the body. Caspases, a family of aspartic acid-specific proteases, are the major effectors of apoptosis. To curtail their activity, caspases are normally synthesized as inactive precursors, but become activated at the onset of apoptosis by activation signals. Once active, caspases preside over the ordered dismantling of the cell through restricted proteolysis of hundreds of substrate proteins. Over the last 10 years, intense research has focused upon the pathways that control caspase activation. Although some, such as the apoptosome and death receptor-mediated pathways to caspase activation, are well established, others are less clearly defined. In this review, we discuss current perspectives concerning the diverse pathways to caspase activation.
Insights
Apoptosis uses caspases (cysteine-aspartic proteases) to dismantle cells. This review explores diverse, well-established and emerging pathways controlling caspase activation during programmed cell death.
Area of Science:
- Cell Biology
- Biochemistry
Background:
- Apoptosis is a crucial, regulated process for removing unwanted cells.
- Caspases, aspartic acid-specific proteases, are key executioners of apoptosis.
- Caspases are synthesized as inactive precursors and activated by specific signals.
Discussion:
- This review examines current knowledge on caspase activation pathways.
- Focus is placed on both established pathways (e.g., apoptosome, death receptors) and less defined routes.
- Understanding caspase activation is vital for controlling cell death.
Key Insights:
- Caspase activation is tightly regulated to ensure controlled cell dismantling.
- Diverse signaling pathways converge to activate caspases.
- Research continues to uncover novel mechanisms of caspase regulation.
Outlook:
- Further elucidation of caspase activation pathways will offer therapeutic targets.
- Understanding these pathways is essential for disease intervention.
- Continued research will refine our knowledge of programmed cell death mechanisms.
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