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Discovery of a novel Nrf2 activator that modulates mitochondrial function in neurons by regulating DHRS3-Nrf2 interaction after ischemic stroke.

Overview

Authors: Xiaohui Sun1, Zhaofeng Liu1, Huanhuan An1, Hengwei Xu1,2, Fangxia Zou1,2, Jing Lu1,2, Xiaofan Zhang1, Xinyu Han1, Ziwei Song1,2, Yanli Sun3, Wenyan Wang1,2, Hongbo Wang1, Jianzhao Zhang1,2, Yunjie Wang1, Jingwei Tian1,2
  1. School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, China
  2. State Key Laboratory of Advanced Drug Delivery and Release Systems, Shandong Luye Pharmaceutical Co., Ltd., Yantai, Shandong, 264003, China
  3. School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
Institutions: Yantai University (China); Luye Pharma (China) (China); ShanghaiTech University (China)
Journal: Theranostics, volume 16, issue 10, pages 5713-5740
Dates: received 18 November 2025; accepted 19 March 2026; published online 30 March 2026
Type: Research article · Language: English
License: CC BY
Identifiers: DOI 10.7150/thno.128602 · PMID 41993611 · PMCID PMC13081163 · OpenAlex W7149983691
Open access: gold, a free copy (OpenAlex)
Status: code on request (how the code is found and verified)
Categories: human (organism), mouse (organism), stroke (population), cellular / molecular (subfield)
Methods: Statistics, Smoothing, state filtering, decompositions, Evoked potentials
Keywords: Nrf2 activator, acute ischemic stroke, DHRS3, Keap1, neurons, mitochondria
MeSH: Ischemic Stroke*, Mitochondria*, Neurons*, Neuroprotective Agents*, NF-E2-Related Factor 2*, Animals, Brain Ischemia, Humans, Kelch-Like ECH-Associated Protein 1, Male, Mice, Triterpenes (* major topic)
Topic: Genomics, phytochemicals, and oxidative stress (Molecular Biology, Biochemistry, Genetics and Molecular Biology), according to OpenAlex
Citations: cited by 2 papers (Europe PMC); 84 references in the paper
Research resources: Human neuroblastoma cell line RRID:CVCL_0019, astrocyte cell line RRID:CVCL_3670, microglia cell line RRID:CVCL_II76, Hek-293T RRID:CVCL_ZK70

Abstract

Rationale: Given the crucial role of the Nrf2 pathway in cellular adaptability to stress, targeting small-molecule activation of Nrf2 represents a promising therapeutic strategy for acute ischemic stroke (AIS). However, the clinical translation of existing Nrf2 activators is hindered by adverse effects, such as liver damage, and none are currently approved for AIS. Therefore, we aimed to develop a novel Nrf2 activator that specifically activates neuronal Nrf2 while mitigating adverse effects, with the goal of providing a lead compound for AIS.

Methods: We validated the anti-AIS effects and mitochondrial protective functions of the novel Nrf2 activator Cpd.51 through multiple in vivo and in vitro experiments. Mechanistic studies involving surface plasmon resonance, cellular thermal shift assay, co-immunoprecipitation, chromatin immunoprecipitation, GST pull-down, and RNA sequencing were used to determine how Cpd.51 activates Nrf2. A comparative toxicological evaluation was conducted to demonstrate its superior safety profile over parent compound (Omaveloxolone).

Results: Cpd.51 exhibited favorable blood-brain barrier permeability, improved safety profile, enhanced mitochondrial function protection and significant neuroprotective effect through the specific activation of neuronal Nrf2. Mechanistically, Cpd.51 interacted with Cys151 and Gly148 in the BTB domain of Keap1, inhibiting Nrf2 degradation, consequently suppressing the transcription of its downstream target DHRS3, a member of the short-chain dehydrogenase/reductase family. Furthermore, Cpd.51 exerted additional Nrf2-activating activity by disrupting protein-protein interactions between Nrf2 and DHRS3.

Conclusions: Our work identified Cpd.51 as a novel and safe Nrf2 activator and unveils a unique feedback mechanism involving Nrf2-DHRS3 interaction, providing a new therapeutic avenue for AIS.

Reproduced under the paper's license (CC BY), from the paper cited above.

Code

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The paper's code and data availability statement is in the Data section.

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Data

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Data and code availability

All data reported in this paper will be shared by the lead contact upon request. This paper does not report original code.

Any additional information required to reanalyze the data reported in this paper is available from the lead contact upon request.

Reproduced under the paper's license (CC BY), from the paper cited above.

Versions

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Version 1, 30 September 2026: the first record

Recorded: type, language, journal, volume, issue, pages, dates, 15 authors, 6 keywords, 12 MeSH terms, 2 funders, 84 references, 4 RRIDs.

Cite

This paper

Sun, X., Liu, Z., An, H., Xu, H., Zou, F., Lu, J., Zhang, X., Han, X., Song, Z., Sun, Y., Wang, W., Wang, H., Zhang, J., Wang, Y., & Tian, J. (2026). Discovery of a novel Nrf2 activator that modulates mitochondrial function in neurons by regulating DHRS3-Nrf2 interaction after ischemic stroke. Theranostics, 16(10), 5713-5740. https://doi.org/10.7150/thno.128602

BibTeX

@article{sun2026discovery,
author = {Sun, Xiaohui and Liu, Zhaofeng and An, Huanhuan and Xu, Hengwei and Zou, Fangxia and Lu, Jing and Zhang, Xiaofan and Han, Xinyu and Song, Ziwei and Sun, Yanli and Wang, Wenyan and Wang, Hongbo and Zhang, Jianzhao and Wang, Yunjie and Tian, Jingwei},
title = {{Discovery of a novel Nrf2 activator that modulates mitochondrial function in neurons by regulating DHRS3-Nrf2 interaction after ischemic stroke}},
journal = {Theranostics},
year = {2026},
month = mar,
volume = {16},
number = {10},
pages = {5713--5740},
publisher = {Ivyspring International Publisher},
issn = {1838-7640},
doi = {10.7150/thno.128602},
url = {https://doi.org/10.7150/thno.128602},
pmid = {41993611},
pmcid = {PMC13081163}
}

RIS

TY - JOUR
AU - Sun, Xiaohui
AU - Liu, Zhaofeng
AU - An, Huanhuan
AU - Xu, Hengwei
AU - Zou, Fangxia
AU - Lu, Jing
AU - Zhang, Xiaofan
AU - Han, Xinyu
AU - Song, Ziwei
AU - Sun, Yanli
AU - Wang, Wenyan
AU - Wang, Hongbo
AU - Zhang, Jianzhao
AU - Wang, Yunjie
AU - Tian, Jingwei
TI - Discovery of a novel Nrf2 activator that modulates mitochondrial function in neurons by regulating DHRS3-Nrf2 interaction after ischemic stroke
T2 - Theranostics
J2 - Theranostics
PY - 2026
DA - 2026/03/30
VL - 16
IS - 10
SP - 5713
EP - 5740
SN - 1838-7640
PB - Ivyspring International Publisher
DO - 10.7150/thno.128602
UR - https://doi.org/10.7150/thno.128602
LA - en
ER -

CSL-JSON

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