Cell-Permeable Peptide Inhibitors of JNK
Open accessAbstract
Stress conditions and proinflammatory cytokines activate the c-Jun NH2-terminal kinase (JNK), a member of the stress-activated group of mitogen-activated protein kinases (MAPKs). We recently demonstrated that inhibition of JNK signaling with the use of the islet-brain (IB) 1 and 2 proteins prevented interleukin (IL)-1β—induced pancreatic β-cell death. Bioactive cell-permeable peptide inhibitors of JNK were engineered by linking the minimal 20-amino acid inhibitory domains of the IB proteins to the 10-amino acid HIV-TAT sequence that rapidly translocates inside cells. Kinase assays indicate that the inhibitors block activation of the transcription factor c-Jun by JNK. Addition of the peptides to the insulin-secreting βTC-3 cell line results in a marked inhibition of IL-1β—induced c-jun and c-fos expression. The peptides protect βTC-3 cells against apoptosis induced by IL-1β. All-D retro-inverso peptides penetrate cells as efficiently as the L-enantiomers, decrease c-Jun activation by JNK, and remain highly stable inside cells. These latter peptides confer full protection against IL-1β—induced apoptosis for up to 2 weeks of continual treatment with IL-1β. These data establish these bioactive cell-permeable peptides as potent pharmacological compounds that decrease intracellular JNK signaling and confer long-term protection to pancreatic β-cells from IL-1β—induced apoptosis.
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The minimal JNK-binding region of JIP1 (pepJIP1) inhibits JNK activity in vitro toward c-jun, Elk, and ATF2 up to 90% with selectivity over Erk and p38.
“This peptide, pepJIP1 (a peptide version of JIP1), inhibited JNK activity in vitro toward recombinant c-jun, Elk, and ATF2 up to 90% with significant selectivity of no inhibition of the related Erk and p38 MAPKs.”
From Structural basis for the selective inhibition of JNK1 by the scaffolding protein JIP1 and SP600125 (2004) · cites this paper as Bonny et al , 2001
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- Authors
- Bonny, C., Oberson, A., Negri, S., Sauser, C., & Schorderet, D. F.
- Affiliations
- Centre Hospitalier Universitaire Vaudois (CH)
- From the Division of Medical Genetics, Centre Hospitalier Universitaire Vaudois—University Hospital, 1011 Lausanne, Switzerland.
- Venue
- Diabetes
- Publisher
- American Diabetes Association
- Published
- 2001-01-01
- Volume
- 50
- Issue
- 1
- Pages
- 77-82
- ISSN
- 0012-1797 (ISSN-L)
- 1939-327X
- OpenAlex
- W2059995799
- Cited by
- 571
- References
- 46
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 9 · 2023: 14 · 2022: 9 · 2021: 5 · 2020: 11 · 2019: 7 · 2018: 11 · 2017: 16 · 2016: 17 · 2015: 13 · 2014: 21 · 2013: 19 · 2012: 25
- FWCI
- 35.95
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Diabetes (publishedVersion)
- PubMed (publishedVersion)
- IRIS (submittedVersion)
- SERVAL (Université de Lausanne) (submittedVersion)
- Topics
- Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
- Keywords
- JNK inhibition, cell-permeable peptide, c-Jun activation, pancreatic beta-cell destruction, retro-inverso peptides, Fos expression, peptide stability
- MeSH terms
- Amino Acid Sequence, Cell Line, Cell Membrane Permeability, Enzyme Inhibitors, Humans, Interleukin-1, Islets of Langerhans, Molecular Sequence Data, Nuclear Proteins, Peptides, Trans-Activators, Proto-Oncogene Proteins c-jun, Proto-Oncogene Proteins c-fos, Cell Death, Conserved Sequence, Apoptosis, Mitogen-Activated Protein Kinases, JNK Mitogen-Activated Protein Kinases, Adaptor Proteins, Signal Transducing
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