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Updated: Feb 10, 2026

Measuring Oxidative Stress Resistance of Caenorhabditis elegans in 96-well Microtiter Plates
Published on: May 9, 2015
Oxidation resistance 1 is a novel senolytic target
Xin Zhang1, Suping Zhang1,2, Xingui Liu1
1Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
Piperlongumine (PL) is a senolytic agent that targets oxidation resistance 1 (OXR1). Degrading OXR1 selectively kills senescent cells, offering a new therapeutic strategy for age-related diseases.
Area of Science:
- Cellular senescence
- Aging research
- Drug discovery
Background:
- Senescent cells (SCs) contribute to age-related diseases.
- Senolytic agents selectively eliminate SCs.
- Piperlongumine (PL) is a newly identified senolytic agent with an unknown mechanism.
Purpose of the Study:
- To elucidate the molecular mechanism and targets of Piperlongumine (PL) in senescent cells (SCs).
- To identify novel senolytic targets for therapeutic development.
Main Methods:
- Utilized a PL-based chemical probe for protein pull-down assays in live cells.
- Employed mass spectrometry-based proteomics to identify PL-binding proteins in SCs.
- Investigated the role of oxidation resistance 1 (OXR1) in SCs using RNA interference and oxidative stress models.
Main Results:
- Identified oxidation resistance 1 (OXR1) as a prominent PL-binding protein upregulated in senescent human WI38 fibroblasts.
- Demonstrated that PL directly binds to OXR1 and induces its degradation via the ubiquitin-proteasome system in an SC-specific manner.
- Showed that OXR1 knockdown selectively increases reactive oxygen species production and induces apoptosis in SCs, sensitizing them to oxidative stress.
Conclusions:
- OXR1 is a novel senolytic target that plays a crucial role in the resistance of senescent cells to oxidative stress.
- Targeting OXR1 degradation offers a promising strategy for developing new senolytic agents to treat age-related conditions and therapy side effects.
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