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Updated: May 13, 2026

In vitro Cell Migration and Invasion Assays
Published on: June 1, 2014
Regulation of cell migration, invasion and metastasis by IAP proteins and their antagonists
1Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Frankfurt, Germany.
Abstract:
Inhibitor of apoptosis (IAP) proteins are a family comprised of a total of eight mammalian members that were initially described to act as endogenous inhibitors of caspases. In addition, extensive evidence has been accumulated over the last years showing that IAP proteins can regulate various signal transduction pathways, thereby exerting non-apoptotic functions beyond the inhibition of apoptosis. For example, IAP proteins have been implied in the control of cell motility, migration, invasion and metastasis. However, currently the question is controversially discussed whether or not they positively or negatively control these processes. As small-molecule inhibitors of IAP proteins have entered the stage of clinical evaluation as experimental cancer therapeutics, a better understanding of their various cellular effects will be critical for their rational use in the treatment of human diseases.
Insights
Inhibitor of apoptosis (IAP) proteins regulate cell signaling and non-apoptotic functions like migration. Understanding their complex roles is crucial as IAP inhibitors advance in cancer therapy.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- Inhibitor of apoptosis (IAP) proteins are a family of eight mammalian proteins.
- Initially identified as caspase inhibitors, IAPs also regulate diverse signal transduction pathways.
- Emerging evidence links IAPs to non-apoptotic functions, including cell motility, migration, invasion, and metastasis.
Purpose of the Study:
- To elucidate the multifaceted roles of IAP proteins beyond apoptosis inhibition.
- To clarify the controversial functions of IAPs in controlling cell migration, invasion, and metastasis.
- To provide a foundation for the rational application of IAP inhibitors in cancer treatment.
Main Methods:
- Review of existing scientific literature on IAP protein functions.
- Analysis of studies investigating IAP involvement in signal transduction pathways.
- Examination of research on IAP roles in cell motility, migration, invasion, and metastasis.
Main Results:
- IAP proteins exhibit significant non-apoptotic functions by regulating key signaling pathways.
- The precise role of IAPs in promoting or inhibiting cell migration, invasion, and metastasis remains debated.
- Small-molecule IAP inhibitors are progressing towards clinical evaluation for cancer therapy.
Conclusions:
- IAP proteins possess critical non-apoptotic functions that influence cancer progression.
- Further research is necessary to resolve the dual roles of IAPs in cancer metastasis.
- A comprehensive understanding of IAP biology is essential for optimizing IAP-targeted cancer therapies.
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