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Updated: Oct 31, 2025
Author Spotlight: Advanced Single-Molecule Techniques for Investigating Telomeric Protein-DNA Interactions
Published on: August 30, 2024
Identification of peptidomimetic telomere dysfunction inhibitor (TELODIN) through telomere dysfunction-induced foci
Lihui Wang1, Zhiguo Wang1, Jun-Ping Liu1,2,3,4
1Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, Zhejiang Province 311121, China.
Abstract:
Telomere dysfunction-induced focus (TIF) assay allows efficient profiling of telomere dysfunctions in cells and tissues. Here, we describe the use of the TIF assay to screen synthetic peptides from E3 ubiquitin ligase FBW7, a tumor suppressor gene product, to prevent TIFs caused by environmental radiation stress. We demonstrate peptidomimetic telomere dysfunction inhibitor as a potentially intervening therapeutic drug candidate in aging-related diseases. This work demonstrates a novel utility of the TIF assay protocol in identifying telomere dysfunction inhibitors. For complete details on the use and execution of this protocol, please refer to Wang et al (2020).
Insights
Synthetic peptides targeting FBW7, a tumor suppressor, were screened using the telomere dysfunction-induced focus (TIF) assay. This identified a peptidomimetic inhibitor that prevents radiation-induced telomere dysfunction, offering potential for aging-related disease therapies.
Area of Science:
- Cellular biology
- Molecular genetics
- Biochemistry
Background:
- Telomere dysfunction is implicated in aging and age-related diseases.
- The telomere dysfunction-induced focus (TIF) assay is a method for detecting telomere damage.
- FBW7 is a tumor suppressor gene product involved in protein degradation.
Purpose of the Study:
- To screen synthetic peptides derived from FBW7 for their ability to prevent telomere dysfunction.
- To evaluate the potential of identified inhibitors as therapeutic agents for aging-related diseases.
Main Methods:
- Utilized the telomere dysfunction-induced focus (TIF) assay to screen synthetic peptides.
- Exposed cells to environmental radiation stress to induce telomere dysfunction.
- Assessed the efficacy of FBW7-derived peptides in preventing TIFs.
Main Results:
- Identified specific synthetic peptides from FBW7 that inhibit radiation-induced TIFs.
- Demonstrated that a peptidomimetic inhibitor can prevent telomere dysfunction.
- Validated the utility of the TIF assay in discovering telomere dysfunction inhibitors.
Conclusions:
- FBW7-derived peptides show promise in preventing telomere dysfunction.
- Peptidomimetic telomere dysfunction inhibitors represent potential therapeutic candidates for aging-related diseases.
- The TIF assay is a valuable tool for identifying novel telomere dysfunction inhibitors.
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