Luciano Pirone, Bianca Fiorillo, Annarita Del Gatto, Rita Russo, Alessandra Guarracino, Chiara Cassiano, Laura Zaccaro, Federica Moraca, Emilia Pedone, Bruno Catalanotti
{"title":"Identification of the first peptide inhibitor of UBE2C enzymatic activity: insights from metadynamics-guided folding and binding studies.","authors":"Luciano Pirone, Bianca Fiorillo, Annarita Del Gatto, Rita Russo, Alessandra Guarracino, Chiara Cassiano, Laura Zaccaro, Federica Moraca, Emilia Pedone, Bruno Catalanotti","doi":"10.1080/14756366.2025.2605383","DOIUrl":"10.1080/14756366.2025.2605383","url":null,"abstract":"<p><p>UBE2C (also known as UbcH10) is a ubiquitin-conjugating enzyme essential for mitotic progression and a potential therapeutic target in cancer. Here, we report a structure-based design and characterisation of peptides derived from a natural interacting partner (U1) aimed at modulating UBE2C activity. Biophysical and biochemical assays identified peptide <b>5</b> as a lead compound, capable of binding UBE2C with micromolar affinity and inhibiting the formation of the UBE2C-Ub thioester complex. Enhanced sampling molecular dynamics simulations revealed that peptide folding landscapes are correlated with activity, with active peptides sampling transient β-sheet conformations compatible with binding. To the best of our knowledge, this is the first report of a peptide inhibitor of UBE2C enzymatic activity.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2605383"},"PeriodicalIF":5.4,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12777749/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145911943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yun-Jeong Ji, Min Hye Kang, Sin Hee Han, Young-Seob Lee, Myoung-Jin Kim, Jang Hoon Kim, Gwi Yeong Jang
{"title":"<i>Cynanchum wilfordii</i> modulates inflammatory responses in LPS-stimulated RAW264.7 cells via the NF-κB and MAPK pathways.","authors":"Yun-Jeong Ji, Min Hye Kang, Sin Hee Han, Young-Seob Lee, Myoung-Jin Kim, Jang Hoon Kim, Gwi Yeong Jang","doi":"10.1080/14756366.2025.2568085","DOIUrl":"10.1080/14756366.2025.2568085","url":null,"abstract":"<p><p><i>Cynanchum wilfordii</i> is a widely used herb in Oriental medicine, known for its wide range of therapeutic applications. The present study was conducted with the aim of evaluating the effects of selected compounds isolated from <i>C. wilfordii</i>, including 4-hydroxyacetophenone (CW1), 2,4-dihydroxyacetophenone (CW2), <i>wilfoside</i> K1N (CW3), and <i>cynandione</i> A (CW4), on the inflammatory response induced by treatment of macrophages with LPS. The study focused on the analysis of the MAPK and NF-κB pathways. The results showed that treatment with CW1, CW2, CW3 and CW4 inhibited the expression of p-ERK, p-JNK, p-p38 and p-IkBa in LPS-induced macrophages, with CW4 exhibiting the greatest inhibitory effects. Furthermore, CW4 treatment showed the most significant inhibitory effect on p-IκB-α/IκB-α expression in the NF-κB pathway. In conclusion, the data demonstrate that CW4 exerts a robust inhibitory effect on macrophage inflammatory signalling pathways in the LPS-induced inflammatory response.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2568085"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12829426/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146018894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthetic strategies and therapeutic insights into FDA-approved indole-containing drugs.","authors":"Tengjiao Yang, Yanfeng Zhang, Peng Liu, Peng Qi, Xiankai Li, Wubin Zhi, Lijie Zhao","doi":"10.1080/14756366.2026.2616556","DOIUrl":"10.1080/14756366.2026.2616556","url":null,"abstract":"<p><p>Indole is a privileged heteroaromatic scaffold in medicinal chemistry, characterised by its unique physicochemical properties, hydrogen-bonding potential, and bioisosteric versatility. Over the past decades, numerous indole-containing drugs have been approved by the Food and Drug Administration (FDA), spanning diverse therapeutic areas including oncology, infectious diseases, gastrointestinal disorders, neurological conditions, and cardiovascular diseases. This review provides a comprehensive survey of FDA-approved indole-based drugs, with particular emphasis on those approved from 2013 to the present. Representative synthetic strategies are highlighted to illustrate the versatility of the indole framework in drug design. Furthermore, we systematically discuss each drug's pharmacology, mechanisms of action, and clinical applications. By integrating synthetic chemistry with clinical applications, this review aims to provide medicinal chemists and drug developers with guidance for leveraging indole scaffolds in next-generation therapeutic discovery and development.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2616556"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12854230/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146064180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yishu Zhao, Haiying Jia, Yan Wang, Shanshan Sha, Dong An, Shufeng Yang, Lei Qian, Yufang Ma, Liming Xu
{"title":"Over-expression, purification, and kinetic analysis of <i>Mycobacterium tuberculosis</i> WecA.","authors":"Yishu Zhao, Haiying Jia, Yan Wang, Shanshan Sha, Dong An, Shufeng Yang, Lei Qian, Yufang Ma, Liming Xu","doi":"10.1080/14756366.2025.2610028","DOIUrl":"10.1080/14756366.2025.2610028","url":null,"abstract":"<p><p>The N-acetylglucosamine-1-phosphate transferase (WecA)is a potential target for developing anti-tuberculosis drugs, due to its critical role in the synthesis of mycobacterial cell wall. The enzymatic study of WecA and the discovery of WecA inhibitors are therefore justified. However, WecA is a membrane protein with 11 transmembrane domains, making it difficult to be obtained, and even more difficult to perform activity studies. In order to gain sufficient WecA protein for activity investigation, the <i>Escherichia coli</i> (<i>E. coli</i>) Lemo21(DE3) strain was utilised in this study. The expression level of WecA was precisely regulated by T7 lysozyme. Purified WecA was obtained by affinity chromatography and identified by mass spectrometry. The kinetic properties of WecA were determined based on the detection of the product UMP. In addition, tunicamycin proved to be a competitive inhibitor. These results will lay theoretical foundations for the elucidation of WecA catalytic mechanism and the development of WecA inhibitors.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2610028"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12784632/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145933639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shuai Liu, Yongfeng Lao, Long Cheng, Xi Xiao, Longtu Ma, Wenyun Wang, Kun Zhao, Wenxuan Li, Zhongze Zhou, Qingchao Li, Yan Tao, Shanhui Liu, Zhilong Dong
{"title":"Integrating virtual screening and molecular dynamics simulations to identify emodin as a PYCR1 inhibitor modulating docetaxel sensitivity in prostate cancer.","authors":"Shuai Liu, Yongfeng Lao, Long Cheng, Xi Xiao, Longtu Ma, Wenyun Wang, Kun Zhao, Wenxuan Li, Zhongze Zhou, Qingchao Li, Yan Tao, Shanhui Liu, Zhilong Dong","doi":"10.1080/14756366.2026.2622725","DOIUrl":"10.1080/14756366.2026.2622725","url":null,"abstract":"<p><p>Docetaxel (DTX) resistance is the main cause of treatment failure in castration-resistant prostate cancer (CRPC). Pyrroline-5-carboxylic acid reductase 1 (PYCR1) is an enzyme involved in proline metabolism. It is highly expressed in various cancers and promotes malignant progression, yet its role in DTX resistance in prostate cancer remains unclear. In this study, bioinformatics analyses and <i>in vitro</i>/<i>vivo</i> experiments demonstrated that interfering with PYCR1 expression modulates the sensitivity of prostate cancer cells to DTX. Subsequently, via structure-based virtual screening, molecular dynamics simulations, and cellular thermal shift assay (CETSA), emodin-an anthraquinone compound-was identified as a PYCR1-targeting agent. Collectively, these findings suggest that PYCR1 may serve as a key target mediating DTX resistance in prostate cancer, and the emodin-DTX combination provides a promising potential clinical strategy to overcome such resistance. Finally, its functions and safety were also verified through <i>in vitro</i> experiments.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2622725"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12893152/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146149826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Solvent-controlled Rh-catalysed hydrodehalogenation and construction of phenanthridinone skeleton from a common precursor in one-step sequence and the antitumor activity of its derivatives.","authors":"De-Xuan Hu, Chao Qin, Xiang Gao, Ling Tang, Yaxin Zheng, Rui Yin","doi":"10.1080/14756366.2026.2704432","DOIUrl":"10.1080/14756366.2026.2704432","url":null,"abstract":"<p><p>Herein, we report a solvent-controlled, operationally convenient and highly efficient rhodium(II)-catalysed protocol enabling hydrodehalogenation and phenanthridinone skeleton construction from 2-halobenzamide. This methodology facilitates the hydrodehalogenation of diverse 2-halobenzamides using isopropanol, providing quantitative yields without further purification. Furthermore, this strategy allows the direct and efficient conversion of 2‑halobenzamides into phenanthridinones by aprotic solvent. Additionally, a series of phenanthridinone derivatives were synthesised and evaluated for their inhibitory activities against tyrosyl-DNA phosphodiesterase 1 (TDP1) and topoisomerase IB (TOP1), as well as their cytotoxicity. Compound <b>3a</b> showed potent TDP1 inhibitory activity (IC<sub>50</sub> = 4.5 ± 0.4 μM) and synergistic effect with topotecan and radiosensitising effect in HCT116 cells by stabilising cellular TDP1 cleavage complexes (TDP1cc). Compound <b>3c</b> exhibited strong TOP1 inhibition (+++) and induced the formation of cellular TOP1 cleavage complexes (TOP1cc) and DNA damage, and consequently triggered apoptosis. <i>In vivo</i> studies indicated that <b>3c</b> exhibits antitumor efficacy in HCT116 xenograft model.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2704432"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13417644/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148604091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shangqi Yin, Wuzheng Liu, Chunxiao Gao, Chunyan Li, Jun Wu
{"title":"Diethyl Phthalate (DEP) as a potential osteosarcoma risk factor: a multi-omics study integrating network Toxicology, single-cell RNA sequencing, and molecular docking.","authors":"Shangqi Yin, Wuzheng Liu, Chunxiao Gao, Chunyan Li, Jun Wu","doi":"10.1080/14756366.2025.2611582","DOIUrl":"10.1080/14756366.2025.2611582","url":null,"abstract":"<p><p>Diethyl phthalate (DEP), a common plasticiser and endocrine disruptor, has been linked to cancer, but its role in osteosarcoma (OS) remains unclear. This study integrated network toxicology, transcriptomics, protein-protein interaction (PPI) analysis, machine learning, molecular docking, molecular dynamics (MD), single-cell RNA sequencing (scRNA-seq), and external validation to investigate DEP-related mechanisms in OS. We identified 45 DEP-responsive genes enriched in extracellular matrix-related pathways. PPI network analysis revealed 11 hub genes, of which LASSO, SVM-RFE, and Boruta algorithms consistently prioritised P4HA2, COL18A1, and COL10A1. Docking and MD simulations supported stable binding of DEP to P4HA2 and COL18A1 via hydrogen bonds and hydrophobic interactions. scRNA-seq demonstrated celltype-specific expression of these genes. Validation cohorts confirmed their upregulation in OS, with AUC values up to 0.950. These findings suggest that DEP may promote OS progression by targeting extracellular matrix remodelling, offering new diagnostic biomarkers and hypothesis-generating evidence for environmental osteocarcinogenesis.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2611582"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912210/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146201859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design, synthesis, and anti-inflammatory evaluation of novel analogues derived from the natural product reticuline.","authors":"Yanyan Feng, Tong Li, Cheng Chen, Ziwei Tang, Zhouyan Liu, Chenglei Gu, Yang Pan, Jichao Chen","doi":"10.1080/14756366.2026.2682077","DOIUrl":"10.1080/14756366.2026.2682077","url":null,"abstract":"<p><p>The natural alkaloid reticuline exhibits promising anti-inflammatory activity in preclinical models; however, its development is hindered by moderate potency and limited accessibility. To overcome these hurdles, we developed an efficient synthetic route to reticuline, enabling the design and synthesis of 21 structural analogues. Through systematic structure-activity relationship (SAR) exploration, compound <b>10f</b> was identified as a lead candidate, demonstrating potent anti-inflammatory effects coupled with low cytotoxicity in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages. Mechanistic studies revealed that <b>10f</b> suppressed the production of nitric oxide (NO), reactive oxygen species (ROS), and the pro-inflammatory cytokines TNF-<i>α</i> and IL-6. This anti-inflammatory effect was accompanied by the downregulation of iNOS and COX-2 expression and the inhibition of MAPK signalling pathway. Collectively, this work presents <b>10f</b> as a promising anti-inflammatory lead compound and provides a rational strategy for the structural optimisation of natural product-inspired scaffolds.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2682077"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13237792/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148156726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hai Zhang, Shudan Yang, Yuting Wang, Miao-Miao Niu, Jingjiang She
{"title":"Discovery of a novel and potent KRAS<sup>G12V</sup>-targeting peptide with antiproliferative activity against colorectal cancer cells.","authors":"Hai Zhang, Shudan Yang, Yuting Wang, Miao-Miao Niu, Jingjiang She","doi":"10.1080/14756366.2026.2684700","DOIUrl":"10.1080/14756366.2026.2684700","url":null,"abstract":"<p><p>Despite the clinical relevance of KRAS<sup>G12V</sup> in colorectal cancer, KRAS<sup>G12V</sup>-specific inhibitors remain limited. Through structure-based virtual screening of a 59,319-member peptide library, we identified four KRAS<sup>G12V</sup>-targeting peptides, among which Peptide-1 showed the most favourable docking profile. MST assays confirmed Peptide-1 had the highest affinity among Peptides 1-4, with stronger binding to KRAS<sup>G12V</sup> than to other KRAS mutants. Structural analysis, molecular dynamics simulations, and free-energy calculations indicated that Peptide-1 formed a stable and energetically favourable complex with KRAS<sup>G12V</sup> through extensive hydrogen bonding and hydrophobic interactions. Peptide-1 showed favourable human serum stability and cellular NanoBRET-supported engagement with KRAS<sup>G12V</sup>. Functionally, Peptide-1 displayed potent antiproliferative activity in colorectal cancer cell lines, weaker effects on normal cells and reduced efficacy after KRAS<sup>G12V</sup> knockdown. In SW480 cells, Peptide-1 was associated with reduced ERK1/2 phosphorylation, p21 upregulation, and G0/G1 accumulation. Overall, these findings support further investigation of Peptide-1 as a KRAS<sup>G12V</sup>-targeting peptide for colorectal cancer drug discovery.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2684700"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13262105/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148218003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yunqin Sun, Yunchang Yang, Xinyao Kang, Yaofeng Wang
{"title":"Nanozymes: bridging nanoscale characteristics and catalytic mechanisms for advanced biomedical applications.","authors":"Yunqin Sun, Yunchang Yang, Xinyao Kang, Yaofeng Wang","doi":"10.1080/14756366.2026.2690829","DOIUrl":"10.1080/14756366.2026.2690829","url":null,"abstract":"<p><p>Nanozymes-nanomaterials with intrinsic enzyme-like activity-have emerged as a transformative paradigm in biomedicine. Their catalytic proficiency is fundamentally dictated by unique nanoscale characteristics, particularly tuneable surface defects and geometric configurations. This review critically re-evaluates nanozyme catalytic mechanisms, precisely categorising them into reactive oxygen species (ROS)-generating pathways and electron-transfer processes. We highlight recent structural breakthroughs, emphasising the evolution from conventional nanoparticles to single-atom and dual-atom nanozymes (SANs/DANs) that exhibit unprecedented reaction kinetics. Furthermore, we synthesise their advanced applications across in vitro diagnostics, synergistic tumour therapy, antibacterial interventions, and regenerative medicine. Finally, we address current clinical translational bottlenecks and envision how artificial intelligence (AI)-guided rational design will shape the field's future. By bridging fundamental physical chemistry with clinical utility, this review provides a definitive mechanistic roadmap for deploying nanozymes in precision nanomedicine.</p>","PeriodicalId":15769,"journal":{"name":"Journal of Enzyme Inhibition and Medicinal Chemistry","volume":"41 1","pages":"2690829"},"PeriodicalIF":5.3,"publicationDate":"2026-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13292316/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148301786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}