IAP proteins as targets for drug development in oncology
Laurence Dubrez1, Jean Berthelet, Valérie Glorian
1Institut National de la Santé et de la Recherche Médicale (Inserm), Dijon, France ; Université de Bourgogne, Dijon, France.
Abstract:
The inhibitors of apoptosis (IAPs) constitute a family of proteins involved in the regulation of various cellular processes, including cell death, immune and inflammatory responses, cell proliferation, cell differentiation, and cell motility. There is accumulating evidence supporting IAP-targeting in tumors: IAPs regulate various cellular processes that contribute to tumor development, such as cell death, cell proliferation, and cell migration; their expression is increased in a number of human tumor samples, and IAP overexpression has been correlated with tumor growth, and poor prognosis or low response to treatment; and IAP expression can be rapidly induced in response to chemotherapy or radiotherapy because of the presence of an internal ribosome entry site (IRES)-dependent mechanism of translation initiation, which could contribute to resistance to antitumor therapy. The development of IAP antagonists is an important challenge and was subject to intense research over the past decade. Six molecules are currently in clinical trials. This review focuses on the role of IAPs in tumors and the development of IAP-targeting molecules for anticancer therapy.
Insights
Inhibitors of apoptosis proteins (IAPs) are key regulators of cell processes implicated in cancer. Targeting IAPs shows promise for new anticancer therapies, with several drug candidates in clinical trials.
Area of Science:
- Molecular Biology
- Oncology
- Biochemistry
Background:
- Inhibitors of apoptosis proteins (IAPs) regulate critical cellular functions, including cell death, proliferation, and migration.
- IAP overexpression is observed in various human tumors, correlating with tumor progression and poor treatment response.
- IAPs can be rapidly induced by chemotherapy/radiotherapy via IRES-dependent translation, potentially causing therapeutic resistance.
Purpose of the Study:
- To review the multifaceted role of IAPs in tumor development and progression.
- To discuss the development of IAP-targeting molecules as a therapeutic strategy against cancer.
- To highlight the current status of IAP antagonists in clinical trials.
Main Methods:
- Literature review of studies on IAPs in cancer.
- Analysis of IAP expression patterns in human tumor samples.
- Examination of mechanisms underlying IAP-mediated chemoresistance.
- Overview of preclinical and clinical development of IAP antagonists.
Main Results:
- IAPs play a significant role in promoting tumor growth, survival, and metastasis.
- IAP overexpression is a validated biomarker for poor prognosis in several cancers.
- IAP antagonists have demonstrated potential in preclinical models and are advancing in clinical trials.
Conclusions:
- IAPs represent a promising therapeutic target for novel anticancer strategies.
- Targeting IAPs may overcome resistance mechanisms and improve treatment outcomes.
- The ongoing clinical evaluation of IAP antagonists is crucial for their future application in oncology.
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