Yoshihisa Hirota , Mika Okamoto , Masanori Baba , Yoshitomo Suhara
{"title":"Potential of fat-soluble vitamins as a platform for antiviral drug development","authors":"Yoshihisa Hirota , Mika Okamoto , Masanori Baba , Yoshitomo Suhara","doi":"10.1016/j.bmcl.2025.130292","DOIUrl":"10.1016/j.bmcl.2025.130292","url":null,"abstract":"<div><div>Fat-soluble vitamins, including vitamins A, D, E, and K, exhibit antioxidative, anti-inflammatory, and immunomodulatory effects, making them promising candidates for antiviral drug development. This review highlights their structural features, biological roles, and antiviral potential. Vitamin A derivatives modulate immunity and inhibit viral replication, including SARS-CoV-2. Vitamin D analogs enhance immune responses and target viral enzymes, while vitamin E derivatives reduce oxidative stress and may directly inhibit viral replication. Emerging research on vitamin K derivatives suggests potential antiviral applications. These findings underscore the potential of fat-soluble vitamins as innovative antiviral agents, warranting further investigation to optimize efficacy and clinical use.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"127 ","pages":"Article 130292"},"PeriodicalIF":2.5,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239935","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}
Chengwei Wu , Mengdie Ou , Bo Qin , Shuo Wang , Peng Li , Sheng Cui , Haihong Huang , Gang Li
{"title":"Discovery of 3-phenyl-1H-5-pyrazolylamides as PLpro inhibitors through virtual screening and structure optimization","authors":"Chengwei Wu , Mengdie Ou , Bo Qin , Shuo Wang , Peng Li , Sheng Cui , Haihong Huang , Gang Li","doi":"10.1016/j.bmcl.2025.130293","DOIUrl":"10.1016/j.bmcl.2025.130293","url":null,"abstract":"<div><div>The papain-like protease (PLpro) of SARS-CoV-2 has been identified as a pivotal enzyme in viral replication, indicating it a promising target for drug discovery. Utilizing a virtual screening strategy, compound <strong>1</strong> with the <em>N</em>-(3-(5-amino-1<em>H</em>-pyrazol-3-yl)phenyl) benzenesulfonamide scaffold was discovered as a hit targeting PLpro. Structural modification from virtually screened hit <strong>1</strong> led to the development of a series of substituted 3-phenyl-1<em>H</em>-5-pyrazolylamide derivatives. Notably, compounds <strong>14h</strong> and <strong>14e</strong> exhibited improved PLpro inhibitory activity (IC<sub>50</sub> = 14.2 μM and 12.0 μM, respectively) and low cytotoxicity. Further biological evaluation revealed that compound <strong>14e</strong> with a thiophene aldehyde group displayed potent binding activity (<em>K</em><sub>D</sub> = 1.86 μM). This 3-phenyl-1<em>H</em>-5-pyrazolylamide scaffold offers significant potential for further development as a novel class of PLpro inhibitors.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"127 ","pages":"Article 130293"},"PeriodicalIF":2.5,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144232817","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}
Simin Wang , Jiannan Zhao , Takashi Nakai , Suyi Chen , Yongtao Duan , Ruijun Li , Chuanjun Song , Yongfang Yao
{"title":"Discovery of a novel CD39 inhibitor by DNA-encoded library screening","authors":"Simin Wang , Jiannan Zhao , Takashi Nakai , Suyi Chen , Yongtao Duan , Ruijun Li , Chuanjun Song , Yongfang Yao","doi":"10.1016/j.bmcl.2025.130294","DOIUrl":"10.1016/j.bmcl.2025.130294","url":null,"abstract":"<div><div>The ATP-adenosine pathway, as a key regulator of adaptive immunity, can regulate tumor growth and proliferation, which is an important direction of anti-tumor immunity research. As a rate-limiting extracellular nucleotidase in eATP hydrolysis, CD39 is a promising target for anticancer therapy. In this study, we discovered a novel CD39 small molecule inhibitor (compound <strong>338</strong>) by DNA-encoded library (DEL) technology. Subsequently, compound <strong>338</strong> was synthesized and tested with promising inhibitory effect which IC<sub>50</sub> value was 68.7 nM against CD39. It also showed moderate anti-proliferative effects on tumor cells and low toxicity on normal cell lines. Meanwhile, molecular docking and SPR results demonstrated that <strong>338</strong> had a robust binding interaction with CD39. The druggability of <strong>338</strong> was predicted. In conclusion, the novel compound <strong>338</strong> showed strong CD39 inhibitory activity and good druggability, which can be used as a potential anti-tumor therapeutic agent and can be optimized in further studies.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"127 ","pages":"Article 130294"},"PeriodicalIF":2.5,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221760","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}
Xinrong Tian, Ken Newlander, Louis LaFrance, James Mack, James Brackley, Charles McHugh, Yanan He, Neil Johnson, Maggie Truong, Melissa B. Pappalardi, Michael T. McCabe, Steven D. Knight
{"title":"Asymmetric synthesis of potent and orally bioavailable thiophene-based EZH2 inhibitors","authors":"Xinrong Tian, Ken Newlander, Louis LaFrance, James Mack, James Brackley, Charles McHugh, Yanan He, Neil Johnson, Maggie Truong, Melissa B. Pappalardi, Michael T. McCabe, Steven D. Knight","doi":"10.1016/j.bmcl.2025.130291","DOIUrl":"10.1016/j.bmcl.2025.130291","url":null,"abstract":"<div><div>An efficient synthesis of 6,7-dihydrothieno[3,2-<em>c</em>]pyridin-4(5H)-one bearing 3-methyl-2-(<em>R</em>)-(1-(piperidin-4-yl)ethyl) substituents (<strong>3</strong>), a pivotal intermediate for the development of EZH2 inhibitors, is described. The key steps include a highly enantioselective iridium-catalyzed hydrogenation of a 1,1-disubstituted alkene, cyanomethylation of a bromo thiophene using the Suzuki coupling-isoxazole fragmentation protocol, and subsequent tandem nitrile reduction/lactamization. Potent and orally bioavailable EZH2 inhibitors, such as <strong>25</strong> and <strong>26</strong>, were discovered from <strong>3</strong> by optimizing substitutions at the piperidine ring.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"127 ","pages":"Article 130291"},"PeriodicalIF":2.5,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197908","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}
Emil Salim , Hilkatul Ilmi , Aty Widyawaruyanti , Natsuhisa Oka
{"title":"Design and synthesis of hydroxychloroquine-sugar conjugates as promising antimalarial agents","authors":"Emil Salim , Hilkatul Ilmi , Aty Widyawaruyanti , Natsuhisa Oka","doi":"10.1016/j.bmcl.2025.130289","DOIUrl":"10.1016/j.bmcl.2025.130289","url":null,"abstract":"<div><div>Novel hydroxychloroquine (HCQ)-sugar conjugates were evaluated for their antimalarial activity against chloroquine-sensitive (<em>Pf</em>3D7) and multi-resistant (<em>Pf</em>Dd2) strains of <em>Plasmodium falciparum</em>, cytotoxicity, and hydrolytic stability. HCQ-galactose conjugate with a 1,2-orthioester linkage exhibited the highest activity against <em>Pf</em>3D7 (IC<sub>50</sub> value of 0.018 ± 0.001 μg/mL). Per-<em>O</em>-acetyl-β-<span>d</span>-glucopyranosyl-HCQ exhibited the highest activity against <em>Pf</em>Dd2 (IC<sub>50</sub> = 0.20 ± 0.02 μg/mL), while also maintaining comparable activity against <em>Pf</em>3D7. Orthoester-linked conjugates were gradually hydrolyzed in human serum, resulting in HCQ release, which may contribute to their high activity. Glycosidic bond-linked conjugates showed high hydrolytic stability, retaining a certain level of activity, possibly without releasing HCQ. Toxicity assessments using the BHK21 cell line indicated significantly lower cytotoxicity for all HCQ-sugar conjugates compared to HCQ.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"125 ","pages":"Article 130289"},"PeriodicalIF":2.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189981","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":"Synthesis of substrate peptides incorporating non-natural amino acids and screening study using BACE1","authors":"Shinji Katsuoka, Ryo Watanabe, Yuma Uchida, Masaki Midorikawa, Reo Yamada, Taeko Kakizawa","doi":"10.1016/j.bmcl.2025.130290","DOIUrl":"10.1016/j.bmcl.2025.130290","url":null,"abstract":"<div><div>Peptide library screening is used to detect optimal sequences for enzymatic cleavage; moreover, the data obtained through this screening are useful for the establishment of a fast screening system and designing of substrate-based enzyme inhibitors. In this study, peptide libraries were prepared and digested with the beta-site amyloid precursor protein cleaving enzyme (BACE1). BACE1 has been used as a target enzyme for drug development against Alzheimer's disease (AD). The library sequences were derived from our previous screening study based on amyloid-beta precursor protein (APP) substrates. Then, newly selected non-natural amino acids were incorporated into several positions on these sequences. After digestion with BACE1, the reaction mixtures were analyzed with high-performance liquid chromatography followed by mass spectrometry to identify the peptides undergoing efficient cleavage. The data obtained from this study can be used for designing drugs against AD in the future.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"127 ","pages":"Article 130290"},"PeriodicalIF":2.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144186118","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}
Heng Wu , Liangfeng Zhang , Xuehao Lu , Yuting Han , Zan Wang , Yanqiu Meng
{"title":"Design, synthesis, and activity evaluation of Asiatic acid derivatives as Survivin inhibitors","authors":"Heng Wu , Liangfeng Zhang , Xuehao Lu , Yuting Han , Zan Wang , Yanqiu Meng","doi":"10.1016/j.bmcl.2025.130288","DOIUrl":"10.1016/j.bmcl.2025.130288","url":null,"abstract":"<div><div>Asiatic acid, a triterpenoid isolated from <em>Centella asiatica</em>, putatively functions through inhibition of Survivin—a member of the Inhibitor of Apoptosis Protein (IAP) family that modulates tumor survival. Taking <em>GDP366</em> and <em>LQZ-7I</em>, two Survivin inhibitors of preclinical stage, as reference compounds, two classes of novel Asiatic acid derivatives (24 compounds in total) were designed and synthesized. These compounds demonstrated favorable docking capabilities and binding modes with the three-dimensional crystal structure of Survivin. The MTT assay demonstrated that these compounds exhibited anti-proliferative effects against <em>A549</em> and <em>MCF-7</em> cell lines, with compounds <strong>I</strong><sub><strong>3</strong></sub>, <strong>I</strong><sub><strong>9</strong></sub>, <strong>II</strong><sub><strong>3</strong></sub>, <strong>II</strong><sub><strong>5</strong></sub>, and <strong>II</strong><sub><strong>12</strong></sub> showing potency comparable to the positive control drug. Furthermore, Western blot analysis revealed that compound <strong>II</strong><sub><strong>3</strong></sub> dose-dependently reduced Survivin protein levels. Compound <strong>II</strong><sub><strong>3</strong></sub> provides a valuable reference for further research on Survivin inhibitors.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"125 ","pages":"Article 130288"},"PeriodicalIF":2.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144141019","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":"Discovery of nonpungent Transient Receptor Potential Vanilloid (TRPV1) agonist antedrugs for treatment of dysphagia","authors":"Hiroyuki Kitano , Yuki Mizukami, Masanori Miyauchi, Itaru Natsutani, Kozo Yoshida","doi":"10.1016/j.bmcl.2025.130287","DOIUrl":"10.1016/j.bmcl.2025.130287","url":null,"abstract":"<div><div>Transient Receptor Potential Vanilloid 1 (TRPV1) is a ligand-gated nonselective cation channel that functions as a cellular sensor for heat and chemical stimuli, such as vanilloids. In recent years, TRPV1 has gained attention as a therapeutic target for treating dysphagia, with both preclinical and clinical trials utilizing capsaicin, a member of the vanilloid family. However, TRPV1 agonists often have pronounced irritant properties and may potentially induce hypothermia upon systemic exposure. Here, we describe the synthesis and characterization of a series of nonpungent TRPV1 agonists with antedrug properties. The discovered compounds exhibit similar agonistic properties to capsaicin, while demonstrating low irritancy in animal models and showing no systemic exposure when administered orally. As these compounds selectively act within the oral cavity without causing a sensation of spiciness, they offer a useful alternative to address the challenges associated with TRPV1 agonists as therapeutic agents for improving dysphagia.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"125 ","pages":"Article 130287"},"PeriodicalIF":2.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134186","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}
Grant B. Frost , Yue Liu , Stephen J. Kron , Karl A. Scheidt
{"title":"Telomerase reverse transcriptase degradation via a rationally designed covalent proteolysis targeting chimera","authors":"Grant B. Frost , Yue Liu , Stephen J. Kron , Karl A. Scheidt","doi":"10.1016/j.bmcl.2025.130286","DOIUrl":"10.1016/j.bmcl.2025.130286","url":null,"abstract":"<div><div>Expression of telomerase reverse transcriptase (TERT) is a hallmark of cancer, maintaining telomere integrity to enable replicative immortality. However, TERT also serves multiple enzyme-dependent and -independent functions to support cancer growth and survival, including enhanced DNA damage response. Agents that inhibit TERT reverse transcriptase activity prevent telomere elongation but may fail to limit other TERT functions that mediate cancer therapy resistance. Thus, we applied structure-based design, modular synthesis, and biochemical assays towards developing a proteolysis targeting chimera (PROTAC) to drive proteasomal degradation of TERT in cancer cells. This yielded <strong>NU-PRO-1</strong>, a PROTAC linking the TERT active site-targeted covalent inhibitor <strong>NU-1</strong> to the VHL E3-ligase ligand (<em>S</em>,<em>R</em>,<em>S</em>)-AHPC. Applied to cancer cells, <strong>NU-PRO-1</strong> induced transient VHL- and proteasome-dependent TERT degradation. <strong>NU-PRO-1</strong> did not induce DNA damage on its own but acted to further delay DNA repair after irradiation compared to <strong>NU-1</strong>. TERT-degrading PROTACs provide novel chemical probes of TERT's non-catalytic functions and may overcome the limitations of current telomerase inhibitors as cancer therapeutics.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"125 ","pages":"Article 130286"},"PeriodicalIF":2.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144141024","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}
Zhixian Zhang , Qianhui Shen , Yanping Chen , Zhi Liang , Yuan Liu , Yu Ren , Cailv Wei , Kang Jia , Chao Ding , Shisong Wang , Rongbiao Pi
{"title":"Design and characterization of N-oxide cinnamanilide derivative PX5–9: Improved solubility and BDNF upregulation","authors":"Zhixian Zhang , Qianhui Shen , Yanping Chen , Zhi Liang , Yuan Liu , Yu Ren , Cailv Wei , Kang Jia , Chao Ding , Shisong Wang , Rongbiao Pi","doi":"10.1016/j.bmcl.2025.130266","DOIUrl":"10.1016/j.bmcl.2025.130266","url":null,"abstract":"<div><div>Compound <strong>5</strong>, a cinnamanilide derivative, upregulates brain derivated neurotrophic factor (BDNF) expression but with low soluablity. In this study, <strong>PX5–9</strong>, a N-oxide derivative of <strong>5</strong>, demonstrated significant protective effects in the HT22 glutamate-induced toxicity model and showed no significant toxicity at 30 μM. Western blot analysis confirmed that <strong>PX5–9</strong> increased BDNF levels similar to <strong>5</strong>. Solubility tests revealed a significant improvement in <strong>PX5–9</strong> (37.10 ± 0.33 μg/mL) compared to <strong>5</strong> (< 15 ng/mL). Pharmacokinetic studies of <strong>PX5–9</strong> revealed favorable properties, fast absorption and also can be transformated into parent compound <strong>5</strong>, suggesting it is a potential candidate for these diseases involving with BDNF. The N-oxide modification might be a good prodrug design to enhance solubility while preserving biological activity.</div></div>","PeriodicalId":256,"journal":{"name":"Bioorganic & Medicinal Chemistry Letters","volume":"125 ","pages":"Article 130266"},"PeriodicalIF":2.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125083","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}