Valerio Falasca , Daniel S. Wenholz , Tsz Tin Yu , Naresh Kumar
{"title":"Synthesis of novel isoflavene derivatives with anti-tumour activity","authors":"Valerio Falasca , Daniel S. Wenholz , Tsz Tin Yu , Naresh Kumar","doi":"10.1016/j.bmcl.2025.130350","DOIUrl":"10.1016/j.bmcl.2025.130350","url":null,"abstract":"<div><div>A novel series of isoflavonoid derivatives were generated through click chemistry modifications of the biologically active isoflavene phenoxodiol (PXD). PXD is an effective anticancer and anti-inflammatory agent with estrogen modulating properties which has been evaluated in phase II and III clinical trials. This novel series of analogues was designed to improve PDX's potency and selectivity against estrogen-positive cancers. Although the resulting compounds demonstrated poor estrogen receptor binding affinity, in vitro evaluation nonetheless yielded hit compounds with a 19-fold improvement in anticancer activity compared to PXD (IC<sub>50</sub> = 1.5 μM in T-47-D), along with an understanding of the underlying structure activity relationships (SAR).</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130350"},"PeriodicalIF":2.2,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zi-Han Jia , Qing Xu , Yun-Hao Liu , Ri-Lei Yu , Qin Wang , Ya-Mu Xia , Wei-Wei Gao
{"title":"Discovery of anthraquinone-triazene derivatives as novel antitumor agents causing DNA damage","authors":"Zi-Han Jia , Qing Xu , Yun-Hao Liu , Ri-Lei Yu , Qin Wang , Ya-Mu Xia , Wei-Wei Gao","doi":"10.1016/j.bmcl.2025.130347","DOIUrl":"10.1016/j.bmcl.2025.130347","url":null,"abstract":"<div><div>In this study, 40 anthraquinone-triazene derivatives were designed, and <strong>AT-9</strong> and <strong>AT-10</strong> were screened out as potential antitumor candidates based on their strong binding affinities to DNA and topoisomerase II using molecular docking and molecular dynamics simulations. Antiproliferative assays revealed that <strong>AT-9</strong> and <strong>AT-10</strong> exhibited significantly stronger inhibitory effects on A549 and HeLa cell lines compared to the reference mitoxantrone. The binding modes of <strong>AT-9</strong> and <strong>AT-10</strong> with DNA were confirmed by spectra and gel electrophoresis. Metabolic pathway investigations showed that <strong>AT-9</strong> and <strong>AT-10</strong> were susceptible to nucleophilic attack by water molecules, leading to the release of nitrogen and degradation into an anthraquinone-amide compound. Thus, the synergistic antitumor mechanism arises from the DNA intercalation of the anthraquinone ring and the alkylating effect mediated by the triazene moiety. Furthermore, ADME analysis revealed that <strong>AT-9</strong> and <strong>AT-10</strong> possessed favorable drug-likeness and pharmacokinetic properties, indicating strong potential for further development.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130347"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144712848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design, molecular docking and suppression on NF-κB activity of sinomenine hybrid derivatives","authors":"Jian Tang , Chunbao Jiang , Yuling Zhu , Chongwei Wen , Xiuquan Xu , Haiping Xia","doi":"10.1016/j.bmcl.2025.130348","DOIUrl":"10.1016/j.bmcl.2025.130348","url":null,"abstract":"<div><div>Sinomenine possesses potent suppression on the nuclear factor kappa-B (NF-κB) pathway. The phenylpropanoid moiety was introduced into sinomenine for building dual-structure sinomenine hybrid derivatives. The software AutoDock Vina was used to dock the sinomenine hybrid derivatives with 3 key proteins (1VKX, 4KIK and 6YMN) of NF-κB activation, and the virtually screened derivatives were tested via molecular dynamics simulation. Three series of derivatives were synthesized by Heck cross-coupling reaction, and evaluated for their suppressive effects on NF-κB in HEK 293 cells transfected with plasmid pNF-κB-luc. Some 1-acrylate sinomenine derivatives showed more active suppressive effects than the parent sinomenine. Derivatives <strong>1</strong>–<strong>3</strong> of sinomenine series were more active on NF-κB than other three series. Derivative <strong>3</strong> with 1-phenethyl acrylate was the most active one.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130348"},"PeriodicalIF":2.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144717138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Theresa H. Nguyen , Omar Moukha-Chafiq , Shuklendu Karyakarte , Ana C. Jimenez-Torres , Ganesh Shrestha , Sixue Zhang , Jun Zhu , Corinne E. Augelli-Szafran
{"title":"Synthesis and evaluation of novel substituted N-(2-phenylbutyl)-5,6,7,8-tetrahydro-quinazolin-4-amines as allosteric modulators of HIV-DAT-tat interaction","authors":"Theresa H. Nguyen , Omar Moukha-Chafiq , Shuklendu Karyakarte , Ana C. Jimenez-Torres , Ganesh Shrestha , Sixue Zhang , Jun Zhu , Corinne E. Augelli-Szafran","doi":"10.1016/j.bmcl.2025.130345","DOIUrl":"10.1016/j.bmcl.2025.130345","url":null,"abstract":"<div><div>Allosteric modulation of interaction between Dopamine Transporter (DAT) and HIV-1 transactivator of transcription (Tat) by small molecules suggests a potential therapeutic intervention for HIV-infected patients with concurrent cocaine abuse. We have previously reported <em>in vitro</em> and <em>in vivo</em> studies on a novel allosteric modulator, <strong>SRI-32743</strong>, which was shown to attenuate Tat-induced inhibition of [<sup>3</sup>H]DA uptake and decrease the cocaine-mediated dissociation of [<sup>3</sup>H]WIN35,428 binding in CHO-K1 cells expressing hDAT. Herein we report our initial structure-activity relationship (SAR) studies on <strong>SRI-32743</strong> with the goal of identifying more potent analogs with improved absorption, distribution, metabolism, and excretion (ADME) properties, that can evolve into a pre-clinical candidate against HIV-1 associated neurocognitive disorders (HAND). Our investigation led to the discovery of a novel <em>N</em>-(2-phenylbutyl)-5,6,7,8-tetrahydroquinazolin-4-amine <strong>4e</strong> (<strong>SRI-45949</strong>), which exhibited comparable inhibitory potency and improved solubility as compared to <strong>SRI-32743</strong>.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130345"},"PeriodicalIF":2.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and synthesis of imidazo[2,1-b]thiazole derivatives as potent and selective phosphatidylinositol 4-kinase IIIβ inhibitors for antiviral activity","authors":"Koji Ochiai, Masahiko Kinebuchi, Takekazu Kondo, Takahiro Suezawa, Morio Higuchi, Motomichi Fujita, Akinobu Yokoyama, Hitomi Matsui, Makoto Rembutsu, Yuji Ishibashi, Yuta Tanaka, Aki Yonezawa, Hirotaka Ando, Yoshiaki Kitamura, Michiaki Nagasawa, Masahiro Ueno","doi":"10.1016/j.bmcl.2025.130346","DOIUrl":"10.1016/j.bmcl.2025.130346","url":null,"abstract":"<div><div>The type III phosphatidylinositol 4-kinase beta (PI4KB, PI4KIIIβ) is a lipid kinase that catalyzes the phosphorylation of phosphatidylinositol at the 4-position. PI4KB is widely understood to play a critical role in supporting viral replication, and PI4KB inhibitors are under investigation as potential host-targeting antivirals. In this study, we report potent and selective imidazo[2,1-<em>b</em>]thiazole inhibitors of PI4KB with antiviral activity. Guided by ligand efficiency, optimization efforts yielded potent PI4KB inhibitors, and reducing proton donor count enhanced cellular potency (anti HRV: EC<sub>50</sub> 0.027 μM for compound <strong>29</strong>, 0.007 μM for compound <strong>30</strong>). Furthermore, compound <strong>30</strong> selectively inhibited PI4KB, with minimal off-target kinase activity, as confirmed by profiling.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130346"},"PeriodicalIF":2.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144697224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaoyu Chen , Xuepei Ma , Zixuan Yang , Mei Mao , Wenjia Niu , Chengwei Zhang , Xiaolei Meng , Mengjun Ma , Zhuoyue Li , Xiao Wang , Shanshan Du , Shumin Ma , Siqi Zhang
{"title":"Development and biological evaluation of novel SOS1 inhibitors featuring 5,8-dihydropyrido[4,3-d]pyrimidin-7(6H)-one scaffold","authors":"Xiaoyu Chen , Xuepei Ma , Zixuan Yang , Mei Mao , Wenjia Niu , Chengwei Zhang , Xiaolei Meng , Mengjun Ma , Zhuoyue Li , Xiao Wang , Shanshan Du , Shumin Ma , Siqi Zhang","doi":"10.1016/j.bmcl.2025.130344","DOIUrl":"10.1016/j.bmcl.2025.130344","url":null,"abstract":"<div><div>SOS1 plays a pivotal role in RAS activation and has emerged as a promising therapeutic target for tumors driven by KRAS mutations. In this study, we designed and synthesized a novel series of SOS1 inhibitors based on the 5,8-dihydropyrido[4,3-<em>d</em>]pyrimidin-7(6<em>H</em>)-one scaffold. Biological evaluation revealed that most compounds displayed anti-proliferative activity against K562 leukemia cells. Among these, <strong>A15f</strong> and <strong>B5a</strong> emerged as the most potent compounds comparable to BI-3406. <strong>A15f</strong> and <strong>B5a</strong> exhibited inhibitory activity against KRAS-G12C/SOS1 complex formation, with IC₅₀ value of 40.28 and 11.11 nM respectively and led to a dose-dependent decrease in pERK levels. The combination therapy of KRAS G12C inhibitor and A15f shows enhanced <em>in vitro</em> efficacy. Molecular docking revealed that these two compounds shared a conserved binding mode with SOS1, similar to the reported inhibitors. These findings provide foundation for further development of SOS1-targeted anticancer therapeutics and offer valuable insights for structural optimization of this novel class of inhibitors.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130344"},"PeriodicalIF":2.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144697225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structure–activity relationship studies of tanzawaic acid A, an antifungal agent against Rhizopus oryzae","authors":"Kotaro Tanaka , Shiho Arima , Daiki Lee , Satoshi Ohte , Hiroshi Tomoda , Ryuji Uchida , Taichi Ohshiro , Tohru Nagamitsu","doi":"10.1016/j.bmcl.2025.130343","DOIUrl":"10.1016/j.bmcl.2025.130343","url":null,"abstract":"<div><div>Through structure–activity relationship studies of tanzawaic acid A (TZAA), this research aims to contribute the development of potent antifungal drugs for treating mucormycosis infections. To this end, new TZAA analogs bearing chemical modifications in the side chain and/or C8-methyl group moieties were synthesized. These analogs are not accessible from natural TZAA and therefore required total synthesis. As a result, four of the newly synthesized TZAA analogs exhibited more potent and selective inhibitory activity against <em>R. oryzae</em> compared to TZAA.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130343"},"PeriodicalIF":2.5,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yongcheng Wang , Lei Zhang , Mengjie Shao , Xianxin Hou , Ying Yang , Yifan Yang , Fei Ye , Xuechen Li , Zhiyan Xiao
{"title":"Discovery of novel benzomorpholine derivatives as potent URAT1 inhibitors with hypouricemic effects","authors":"Yongcheng Wang , Lei Zhang , Mengjie Shao , Xianxin Hou , Ying Yang , Yifan Yang , Fei Ye , Xuechen Li , Zhiyan Xiao","doi":"10.1016/j.bmcl.2025.130342","DOIUrl":"10.1016/j.bmcl.2025.130342","url":null,"abstract":"<div><div>Urate transporter 1 (URAT1) is a clinically validated therapeutic target for hyperuricemia and gout. To obtain structurally novel URAT1 inhibitors, a series of benzomorpholine derivatives were designed by adopting a pharmacophore guided molecular hybridization strategy. Most compounds potently inhibit the human URAT1 in HEK293 cells, and the most active compound <strong>7</strong> exhibited an IC<sub>50</sub> of 0.72 μM, which was much more potent than Lesinurad and comparable to Benzbromarone. The possible interaction mode of compound <strong>7</strong> with URAT1 was revealed by molecular modeling. Cell viability assays indicated that compound <strong>7</strong> was less cytotoxic than Benzbromarone in Hep-G2 cells. The urate-lowering effects of compounds <strong>1</strong> and <strong>7</strong> were confirmed in two different hyperuricemia mouse models, and no obvious toxicity was observed in the treated mice. The results provide new chemical prototypes for urate-lowering drug discovery targeting URAT1.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130342"},"PeriodicalIF":2.5,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144648103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carolyn J. Karns , Anchal Singh , Makenzie R. Walk , Emmanuel Adusah , Alyssa M. Pearson , Samuel J. Knebel , Michael W. Beck
{"title":"Fluorescein diacetate (FDA) should not be used to study human carboxylesterase 2 (CES2) in complex biological systems without validation","authors":"Carolyn J. Karns , Anchal Singh , Makenzie R. Walk , Emmanuel Adusah , Alyssa M. Pearson , Samuel J. Knebel , Michael W. Beck","doi":"10.1016/j.bmcl.2025.130331","DOIUrl":"10.1016/j.bmcl.2025.130331","url":null,"abstract":"<div><div>The utility of fluorogenic chemical tools for investigating processes in biologically complex systems depends on validating their specificity in the same system. This is particularly crucial for tools that report on enzymatic activity, especially when enzymes with similar activity are also present which is often true for serine hydrolases. One such serine hydrolase is human carboxylesterase 2 (CES2). CES2 is a key xenobiotic metabolism enzyme responsible for the hydrolysis of drugs belonging to multiple classes. Due to its importance in drug metabolism and potential as a cancer biomarker, there is a need for reliable and accessible tools to study CES2. Fluorescein DiAcetate (FDA) is a commercially available fluorogenic compound that has been employed to study CES2 activity in various systems. Studies carried out <em>in vitro</em> have shown FDA prefers hydrolysis by CES2 over closely related CES1. However, the specificity of FDA for CES2 over CES1 and other hydrolases in complex biological systems has not been rigorously evaluated. This study aimed to characterize FDA as a tool for studying CES2 in complex biological systems using computational, biochemical, and live cell imaging. Our results indicate that FDA is unsuitable for studying CES2 in systems with multiple hydrolases, like HepG2 cells, but may be used when CES2 is the predominant hydrolase, such as in overexpression models. We advise caution when using FDA to study CES2 and emphasize that rigorous validation is necessary to ensure that chemical tools used in complex biological systems specifically report on the intended molecular target in each experimental context.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130331"},"PeriodicalIF":2.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yaru Zhang , Tingnan Ma , Tao Yuan , Lingyu Su , Dongke Yu , Lei Zhong
{"title":"Recent advances and perspectives in therapeutics for mpox","authors":"Yaru Zhang , Tingnan Ma , Tao Yuan , Lingyu Su , Dongke Yu , Lei Zhong","doi":"10.1016/j.bmcl.2025.130330","DOIUrl":"10.1016/j.bmcl.2025.130330","url":null,"abstract":"<div><div>Mpox, a viral illness caused by the monkeypox virus (MPXV), has gained global attention due to its outbreaks worldwide in recent years. MPXV infections pose significant public health threats with notable transmission risks, yet specific antiviral treatments remain limited. Current therapeutic approaches primarily rely on smallpox vaccines and a limited number of broad-spectrum antiviral agents, such as tecovirimat, lacking specific drugs against MPXV. Thus, it remains a significant clinical need to develop anti-MPXV agents for the prevention and control of mpox outbreaks. In this review, we summarized the characteristics of MPXV in terms of viral structure, genome, and replication while reporting the recent progress in the development of small molecule anti-MPXV agents. Additionally, we discussed major obstacles in anti-MPXV drug development, including insufficient understanding of virus biology, the lack of reliable disease models, and limited resources for conducting large-scale clinical evaluations, and provided insights and perspectives for anti-MPXV therapies, with the aims of accelerating the development of effective treatments and contributing to preparedness against emerging orthopoxvirus threats.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"128 ","pages":"Article 130330"},"PeriodicalIF":2.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}