Cited by 100Genomics, phytochemicals, and oxidative stressRedox biology and oxidative stressEndoplasmic Reticulum Stress and Disease

Dihydro-CDDO-Trifluoroethyl Amide (dh404), a Novel Nrf2 Activator, Suppresses Oxidative Stress in Cardiomyocytes

Open access
Ichikawa, Tomonaga, Li, Jinqing, Meyer, Colin J., Janicki, Joseph S., Hannink, Mark, Cui, Taixing·2009·PLoS ONE

Abstract

Targeting Nrf2 signaling appears to be an attractive approach for the treatment of maladaptive cardiac remodeling and dysfunction; however, pharmacological modulation of the Nrf2 pathway in the cardiovascular system remains to be established. Herein, we report that a novel synthetic triterpenoid derivative, dihydro-CDDO-trifluoroethyl amide (dh404), activates Nrf2 and suppresses oxidative stress in cardiomyocytes. Dh404 interrupted the Keap1-Cul3-Rbx1 E3 ligase complex-mediated Nrf2 ubiquitination and subsequent degradation saturating the binding capacity of Keap1 to Nrf2, thereby rendering more Nrf2 to be translocated into the nuclei to activate Nrf2-driven gene transcription. A mutant Keap1 protein containing a single cysteine-to-serine substitution at residue 151 within the BTB domain of Keap1 was resistant to dh404-induced stabilization of Nrf2 protein. In addition, dh404 did not dissociate the interaction of Nrf2 with the Keap1-Cul3-Rbx1 E3 ligase complex. Thus, it is likely that dh404 inhibits the ability of Keap1-Cul3-Rbx1 E3 ligase complex to target Nrf2 for ubiquitination and degradation via modifying Cys-151 of Keap1 to change the conformation of the complex. Moreover, dh404 was able to stabilize Nrf2 protein, to enhance Nrf2 nuclear translocation, to activate Nrf2-driven transcription, and to suppress angiotensin II (Ang II)-induced oxidative stress in cardiomyocytes. Knockdown of Nrf2 almost blocked the anti-oxidative effect of dh404. Dh404 activated Nrf2 signaling in the heart. Taken together, dh404 appears to be a novel Nrf2 activator with a therapeutic potential for cardiac diseases via suppressing oxidative stress.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1371/journal.pone.0008391

Cites

51 of 51 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

2 retracted

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Ichikawa, T., Li, J., Meyer, C. J., Janicki, J. S., Hannink, M., & Cui, T.
Affiliations
  • University of South Carolina (US)
  • Reata Pharmaceuticals (United States) (US)
  • University of Missouri (US)
Corresponding author
  • Hannink, Mark
  • Cui, Taixing
Venue
PLoS ONE
Published
2009-12-21
Volume
4
Issue
12
Pages
e8391
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2040499888
Cited by
99
References
50
Citations by year
2025: 1 · 2024: 3 · 2023: 4 · 2022: 5 · 2021: 3 · 2020: 8 · 2019: 7 · 2018: 5 · 2017: 4 · 2016: 7 · 2015: 5 · 2014: 12 · 2013: 9 · 2012: 17
FWCI
3.49
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
American Heart Association
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics, phytochemicals, and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
Keywords
Nrf2 activation, oxidative stress, cardiomyocytes, Keap1, Nrf2 ubiquitination, Nrf2 nuclear translocation, triterpenoid derivatives, angiotensin II, cardiac remodeling
MeSH terms
Animals, Animals, Newborn, Carrier Proteins, Cell Line, Cell Nucleus, Cytoskeletal Proteins, Humans, Hypertrophy, Myocardium, Oleanolic Acid, Transcription, Genetic, Reactive Oxygen Species, Oxidative Stress, Protein Transport, Reactive Nitrogen Species, Myocytes, Cardiac, Cullin Proteins, NF-E2-Related Factor 2, Mice, Rats, Ubiquitination, Protein Stability

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review