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Misregulation and mutations of the transcription factor Nrf2 are involved in the development of a variety of human diseases. In this study, we employed the technology of stapled peptides to address a protein-DNA-complex and designed a set of Nrf2-based derivatives. Varying the length and position of the hydrocarbon staple, we chose the best peptide for further evaluation in both fixed and living cells. Peptide 4 revealed significant enrichment within the nucleus compared to its linear counterpart 5, indicating potent binding to DNA. Our studies suggest that these molecules offer an interesting strategy to target activated Nrf2 in cancer cells.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9216541 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0267651 | PLOS |
Bioorg Med Chem Lett
September 2025
Department of Radiology, The University of Chicago, Chicago, IL 60637, United States. Electronic address:
Murine double minute 2 (MDM2, also known as human double minute 2 or HDM2) is a negative regulator of the tumor suppressor protein p53 and is overexpressed in many cancers. Over the past two decades, substantial progress has been made in developing inhibitors of the MDM2-p53 interaction, thereby allowing the p53 protein to exert antitumor effects through cell apoptosis and cycle arrest. While there are currently no FDA-approved MDM2 inhibitors available, several small molecule MDM2 inhibitors and a stapled peptide inhibitor of the MDM2-p53 interaction are in clinical development.
View Article and Find Full Text PDFInvest New Drugs
September 2025
Departamento de Química and Institute for Advanced Research in Chemical Science (IAdChem), Facultad de Ciencias, Universidad Autónoma de Madrid, Módulo 13, 28049, Madrid, Spain.
The oncogenic transcription factor MYC drives proliferation, metabolism, and therapy resistance in the majority of human cancers, yet its large, nuclear protein-protein interface has long frustrated direct drug discovery. A pivotal breakthrough was the identification of Tribbles pseudokinase 3 (TRIB3) as a high-affinity scaffold that binds the helix-loop-helix/leucine zipper region of MYC, blocks the E3-ubiquitin-ligase, UBE3B, from tagging critical lysines, and thereby prolongs MYC protein half-life while enhancing MYC-MAX transcriptional output. This review integrates structural, biochemical, and in vivo data to show how genetic deletion or pharmacological eviction of TRIB3 collapses MYC levels, silences its gene program, and suppresses tumor growth in B-cell lymphomas and selected solid tumors.
View Article and Find Full Text PDFiScience
September 2025
Department of Oncology, NHC Key Laboratory of Cancer Proteomics & State Local Joint Engineering Laboratory for Anticancer Drugs, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China.
BH3 mimetics targeting the BCL-2 family hold broad promise for cancer therapy. High similarity between the anti-apoptotic proteins BCL-XL and BCL-2 challenges the engineering of selective inhibitors. The BH3-only protein HRK is a natural selective inhibitor of BCL-XL and to a less extent of BCL-2.
View Article and Find Full Text PDFJ Pept Sci
October 2025
Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
The development of novel candidate molecules for breast cancer treatment holds significant clinical value. Panurgines (PNG), derived from the venom of the wild bee Panurgus calcaratus, are particularly noteworthy for their anti-breast cancer activity and antibacterial properties. However, linear peptides are often hindered by poor stability and limited cell membrane permeability, making them highly susceptible to protease degradation.
View Article and Find Full Text PDFAcc Chem Res
August 2025
Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne, Switzerland.
ConspectusAlkynes are one of the most fundamental functional groups in organic synthesis due to the versatile chemistry of the triple bond, their unique rigid structure, and their use in bioconjugation. The introduction of alkynes onto organic molecules traditionally relies on nucleophilic activation, often requiring strong bases or metal catalysts. These conditions, however, restrict applications involving biomolecules such as peptides and proteins due to functional group incompatibility.
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