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Updated: Jul 14, 2026

Protein Target Prediction and Validation of Small Molecule Compound
Published on: February 23, 2024
Small molecule inhibitors of the XIAP protein-protein interaction
1Department of Medicinal Chemistry, Merck Research Laboratories, WP14-3 P.O. Box 4, West Point, PA 19486, USA. hemaka_rajapakse@merck.com
Abstract:
The X-linked inhibitor of apoptosis proteins (XIAP) is thought to play a key role in the unchecked proliferation of cancer cells by interfering with the signaling cascade leading to cell death. The structure and mechanism of XIAP has been widely investigated and characterized over the past few years, to the point where this may be the best understood apoptosis protein inhibitor. As a result, XIAP is viewed as an attractive target for the treatment of cancer. To date, several research groups have reported on the discovery of small molecule inhibitors of this protein. This review focuses on the discovery and optimization of these leads.
Insights
Small molecule inhibitors targeting X-linked inhibitor of apoptosis proteins (XIAP) show promise for cancer treatment. This review details the discovery and optimization of these XIAP inhibitors, crucial for combating cancer cell proliferation.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- X-linked inhibitor of apoptosis proteins (XIAP) are key regulators of apoptosis.
- XIAP dysregulation contributes to unchecked cancer cell proliferation by inhibiting cell death pathways.
- XIAP is a well-characterized protein and an attractive therapeutic target for cancer treatment.
Purpose of the Study:
- To review the discovery and optimization of small molecule inhibitors targeting XIAP.
- To highlight the therapeutic potential of XIAP inhibition in cancer treatment.
Main Methods:
- Literature review of published studies on XIAP inhibitors.
- Analysis of structure-activity relationships for small molecule XIAP inhibitors.
Main Results:
- Several research groups have identified and characterized small molecule inhibitors of XIAP.
- Optimization efforts have led to potent and selective XIAP inhibitors.
Conclusions:
- Small molecule XIAP inhibitors represent a promising therapeutic strategy for various cancers.
- Further development of these inhibitors could lead to novel cancer treatments.
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