Pub Date : 2026-01-27DOI: 10.1016/j.bioorg.2026.109566
Roque Spinelli , Ivan Sanchis , Milagros de Orellana , Maria Veronica Humpola , Álvaro Rietmann , Álvaro Sebastían Siano
Alzheimer's disease (AD) is a multifactorial and progressive neurodegenerative disorder for which no effective treatment currently exists. The development of multitarget-directed ligands (MTDLs) capable of simultaneously modulating several pathological pathways represents a rational strategy to address its complex etiology. In this study, we report the isolation, chemical synthesis, and functional characterization of BcI-4, a short cationic peptide identified from the skin secretion of the Argentinean frog Boana cordobae. The peptide exhibited potent and reversible inhibitory activity against acetylcholinesterase (AChE), with IC₅₀ values of 1.10 and 0.9 μM for recombinant human and Electrophorus electricus AChE, respectively, acting through a non-competitive mechanism involving the peripheral anionic site (PAS). BcI-4 also inhibited AChE-induced β-amyloid (Aβ) aggregation, showed modest monoamine oxidase B (MAO-B) inhibition, and displayed both antioxidant and metal-chelating activities, including inhibition of lipid peroxidation. The peptide retained the multifuctional pharmacological profile previously observed for the crude extract of B. cordobae, with significantly enhanced potency and selectivity toward AChE. Moreover, BcI-4 was non-toxic in vitro (hemolysis and HeLa cell assays) and in vivo (Artemia salina test) even at the highest concentrations tested. Altogether, these findings position BcI-4 as a nature-inspired multitarget peptide with neuroprotective potential, combining reversible AChE inhibition, anti-amyloid, antioxidant, and MAO-B modulatory activities. BcI-4 represents a promising lead compound for the development of peptide-based therapeutics against AD.
{"title":"A nature-inspired peptide from the Boana cordobae frog as a potent and reversible AChE inhibitor with anti-amyloid and neuroprotective activities","authors":"Roque Spinelli , Ivan Sanchis , Milagros de Orellana , Maria Veronica Humpola , Álvaro Rietmann , Álvaro Sebastían Siano","doi":"10.1016/j.bioorg.2026.109566","DOIUrl":"10.1016/j.bioorg.2026.109566","url":null,"abstract":"<div><div>Alzheimer's disease (AD) is a multifactorial and progressive neurodegenerative disorder for which no effective treatment currently exists. The development of multitarget-directed ligands (MTDLs) capable of simultaneously modulating several pathological pathways represents a rational strategy to address its complex etiology. In this study, we report the isolation, chemical synthesis, and functional characterization of BcI-4, a short cationic peptide identified from the skin secretion of the Argentinean frog <em>Boana cordobae</em>. The peptide exhibited potent and reversible inhibitory activity against acetylcholinesterase (AChE), with IC₅₀ values of 1.10 and 0.9 μM for recombinant human and <em>Electrophorus electricus</em> AChE, respectively, acting through a non-competitive mechanism involving the peripheral anionic site (PAS). BcI-4 also inhibited AChE-induced β-amyloid (Aβ) aggregation, showed modest monoamine oxidase B (MAO-B) inhibition, and displayed both antioxidant and metal-chelating activities, including inhibition of lipid peroxidation. The peptide retained the multifuctional pharmacological profile previously observed for the crude extract of <em>B. cordobae</em>, with significantly enhanced potency and selectivity toward AChE. Moreover, BcI-4 was non-toxic in vitro (hemolysis and HeLa cell assays) and in vivo (<em>Artemia salina</em> test) even at the highest concentrations tested. Altogether, these findings position BcI-4 as a nature-inspired multitarget peptide with neuroprotective potential, combining reversible AChE inhibition, anti-amyloid, antioxidant, and MAO-B modulatory activities. BcI-4 represents a promising lead compound for the development of peptide-based therapeutics against AD.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109566"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-27DOI: 10.1016/j.bioorg.2026.109564
Shoaib Khan, Tayyiaba Iqbal, Ijaz Ali, Kasim Sakran Abass, Maher Fathalla, Eman Alzahrani, Nasir Ud Din, Hamdy Kashtoh, Abdulrahman Almehizia
A novel series of thiadiazole-based Schiff base derivatives (1-16) was synthesized via an efficient multi-step route and characterized using 1H NMR, 13C NMR, and HREI-MS. These compounds were evaluated for their anti-Alzheimer's and anti-urease potential. Among them, compounds 8 and 9 exhibited the most potent inhibition with IC₅₀ values of 6.60 ± 0.40 and 8.10 ± 0.10 μM for AChE, 7.40 ± 0.20 and 8.80 ± 0.40 μM for BChE, and 9.75 ± 1.60 and 10.15 ± 0.50 μM for urease, respectively. Donepezil and thiourea were used as standard inhibitors for comparative evaluation. Molecular docking and pharmacophore modeling supported the inhibitory potential of these compounds. ADMET profiling confirmed favorable drug-likeness and pharmacokinetic properties, while DFT and molecular dynamics simulations validated their stability and reactivity. These results highlight compounds 8 and 9 as promising leads for further development as multifunctional therapeutic agents against Alzheimer's disease and urease-related pathologies.
{"title":"Design-led synthesis and multidimensional evaluation of novel thiadiazoles as multitarget anti-Alzheimer agents: kinetics, DFT and in silico mapping.","authors":"Shoaib Khan, Tayyiaba Iqbal, Ijaz Ali, Kasim Sakran Abass, Maher Fathalla, Eman Alzahrani, Nasir Ud Din, Hamdy Kashtoh, Abdulrahman Almehizia","doi":"10.1016/j.bioorg.2026.109564","DOIUrl":"https://doi.org/10.1016/j.bioorg.2026.109564","url":null,"abstract":"<p><p>A novel series of thiadiazole-based Schiff base derivatives (1-16) was synthesized via an efficient multi-step route and characterized using <sup>1</sup>H NMR, <sup>13</sup>C NMR, and HREI-MS. These compounds were evaluated for their anti-Alzheimer's and anti-urease potential. Among them, compounds 8 and 9 exhibited the most potent inhibition with IC₅₀ values of 6.60 ± 0.40 and 8.10 ± 0.10 μM for AChE, 7.40 ± 0.20 and 8.80 ± 0.40 μM for BChE, and 9.75 ± 1.60 and 10.15 ± 0.50 μM for urease, respectively. Donepezil and thiourea were used as standard inhibitors for comparative evaluation. Molecular docking and pharmacophore modeling supported the inhibitory potential of these compounds. ADMET profiling confirmed favorable drug-likeness and pharmacokinetic properties, while DFT and molecular dynamics simulations validated their stability and reactivity. These results highlight compounds 8 and 9 as promising leads for further development as multifunctional therapeutic agents against Alzheimer's disease and urease-related pathologies.</p>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"109564"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146103251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-27DOI: 10.1016/j.bioorg.2026.109568
Issam Ameziane El Hassani , Ahmet Altay , Esma Yeniçeri , Youness Boukharsa , Hamza Assila , Abdullah Yahya Abdullah Alzahrani , Sana Ben Moussa , M'’hammed Ansar , Khalid Karrouchi
In this research, a series of novel pyrazole-benzofuran hydrazone hybrids (3a-h) were designed, synthesis and evaluated for their anticancer potential. All hybrid pyrazole-benzofuran derivatives were purified and characterized by using 1H NMR, 13C NMR, and ESI-HRMS analyses. Their cytotoxic potentials were evaluated against human lung carcinoma (A-549) and colorectal adenocarcinoma (HT-29) cell lines, and mouse fibroblast (3T3-L1) cells using XTT assay. The findings demonstrated that all compounds exhibited a dose-dependent anti-proliferative effect against the cancer cell lines under investigation. Compound 3d was particularly distinguished by its noteworthy IC50 value of 0.28 μM and a selectivity index of 103.85 on A549 cells. Advanced mechanistic anticancer investigations employing flow cytometry revealed that compound 3d triggered apoptosis in A549 cells by inducing mitochondrial membrane disruption and activating multiple caspases. Furthermore, both flow cytometry and Western blot analysis showed that the 3d molecule significantly suppressed the PI3K/AKT/mTOR signaling pathway, which is vital for cellular proliferation. In summary, the findings suggest that compound 3d has the potential to be evaluated as a therapeutic agent for the treatment of lung cancer.
{"title":"Novel hydrazone-derived pyrazole-benzofuran compounds inhibit cancer cell growth by targeting MMPs, caspases, and PI3K/AKT/mTOR signaling pathway","authors":"Issam Ameziane El Hassani , Ahmet Altay , Esma Yeniçeri , Youness Boukharsa , Hamza Assila , Abdullah Yahya Abdullah Alzahrani , Sana Ben Moussa , M'’hammed Ansar , Khalid Karrouchi","doi":"10.1016/j.bioorg.2026.109568","DOIUrl":"10.1016/j.bioorg.2026.109568","url":null,"abstract":"<div><div>In this research, a series of novel pyrazole-benzofuran hydrazone hybrids (<strong>3a-h</strong>) were designed, synthesis and evaluated for their anticancer potential. All hybrid pyrazole-benzofuran derivatives were purified and characterized by using <sup>1</sup>H NMR, <sup>13</sup>C NMR, and ESI-HRMS analyses. Their cytotoxic potentials were evaluated against human lung carcinoma (A-549) and colorectal adenocarcinoma (HT-29) cell lines, and mouse fibroblast (3T3-L1) cells using XTT assay. The findings demonstrated that all compounds exhibited a dose-dependent anti-proliferative effect against the cancer cell lines under investigation. Compound <strong>3d</strong> was particularly distinguished by its noteworthy IC<sub>50</sub> value of 0.28 μM and a selectivity index of 103.85 on A549 cells. Advanced mechanistic anticancer investigations employing flow cytometry revealed that compound <strong>3d</strong> triggered apoptosis in A549 cells by inducing mitochondrial membrane disruption and activating multiple caspases. Furthermore, both flow cytometry and Western blot analysis showed that the <strong>3d</strong> molecule significantly suppressed the PI3K/AKT/mTOR signaling pathway, which is vital for cellular proliferation. In summary, the findings suggest that compound <strong>3d</strong> has the potential to be evaluated as a therapeutic agent for the treatment of lung cancer.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109568"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.bioorg.2026.109554
Sha Liu , Wenna Song , Qingliang Hu , Yibing Liang , Lifen Wang , Yebing Liu , Xinpan Chen , Liyan Wang , Dai Deng , Aihua Zhang , Yiming Guang , Xueqi Wang , Yongli Han , Hongdong Huang
A series of benzimidazole–oxadiazole–based Schiff base derivatives (1−10) was synthesized and evaluated as potential angiotensin-converting enzyme (ACE) inhibitors. The compounds were characterized using standard spectroscopic techniques and assessed for ACE inhibitory activity through in vitro enzyme assays, with ramipril used as the reference inhibitor. Several derivatives demonstrated significant inhibition, with analogue 8, bearing a trifluoromethyl (CF₃) substituent, exhibiting superior potency compared to ramipril. Molecular docking studies revealed favorable hydrogen bonding and hydrophobic interactions of the active compounds within the ACE catalytic pocket, supporting the observed inhibitory trends. Density functional theory (DFT) calculations provided insight into electronic features associated with enhanced activity, while in silico ADMET analysis suggested acceptable drug-likeness profiles. Furthermore, in vivo toxicity evaluation in rats indicated no observable adverse effects at the tested doses. Overall, the study identifies these benzimidazole–oxadiazole Schiff bases as promising ACE inhibitory scaffolds for further pharmacological optimization.
{"title":"Mechanistic enzyme-oriented investigation of benzimidazole derivatives associated with kidney dysfunction: synthesis, molecular docking and in vivo toxicological evaluation","authors":"Sha Liu , Wenna Song , Qingliang Hu , Yibing Liang , Lifen Wang , Yebing Liu , Xinpan Chen , Liyan Wang , Dai Deng , Aihua Zhang , Yiming Guang , Xueqi Wang , Yongli Han , Hongdong Huang","doi":"10.1016/j.bioorg.2026.109554","DOIUrl":"10.1016/j.bioorg.2026.109554","url":null,"abstract":"<div><div>A series of benzimidazole–oxadiazole–based Schiff base derivatives (1−10) was synthesized and evaluated as potential angiotensin-converting enzyme (ACE) inhibitors. The compounds were characterized using standard spectroscopic techniques and assessed for ACE inhibitory activity through in vitro enzyme assays, with ramipril used as the reference inhibitor. Several derivatives demonstrated significant inhibition, with analogue 8, bearing a trifluoromethyl (CF₃) substituent, exhibiting superior potency compared to ramipril. Molecular docking studies revealed favorable hydrogen bonding and hydrophobic interactions of the active compounds within the ACE catalytic pocket, supporting the observed inhibitory trends. Density functional theory (DFT) calculations provided insight into electronic features associated with enhanced activity, while in silico ADMET analysis suggested acceptable drug-likeness profiles. Furthermore, in vivo toxicity evaluation in rats indicated no observable adverse effects at the tested doses. Overall, the study identifies these benzimidazole–oxadiazole Schiff bases as promising ACE inhibitory scaffolds for further pharmacological optimization.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"172 ","pages":"Article 109554"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.bioorg.2026.109549
Yaqi Lu , Yuyao Feng , Miaoping Lin, Humu Lu, Xiaodong Jiang, Xinya Xu, Yonghong Liu, Xiaowei Luo
Decalin-containing natural products are a significant family of structurally diverse secondary metabolites harboring architecturally multifunctionalized substituents in the decalin core. These compounds are predominantly originated from microorganisms, especially fungi, by terpene or polyketide biosynthetic pathways. They were found with remarkable biological properties, mainly including antimicrobial, antitumor, and antiinflammatory properties. The continuous studies have significantly expanded the structural types and biological diversity of decalin-containing natural products. To provide a comprehensive understanding of recent advances in the chemistry and bioactivity of decalin-containing natural products, this review summarizes 532 new polyketide-type (77.4%) and isoprenoid-type decalins (22.6%) reported from both terrestrial and marine organisms between 2014 and 2025, along with their chemical synthesis, biosynthesis, and structure activity relationships. This review will shed light on further untapped potential pharmacological applications and drug discovery in human health based on decalin-containing natural products.
{"title":"Recent advances in chemistry and bioactivity of decalin-containing natural products (2014–2025)","authors":"Yaqi Lu , Yuyao Feng , Miaoping Lin, Humu Lu, Xiaodong Jiang, Xinya Xu, Yonghong Liu, Xiaowei Luo","doi":"10.1016/j.bioorg.2026.109549","DOIUrl":"10.1016/j.bioorg.2026.109549","url":null,"abstract":"<div><div>Decalin-containing natural products are a significant family of structurally diverse secondary metabolites harboring architecturally multifunctionalized substituents in the decalin core. These compounds are predominantly originated from microorganisms, especially fungi, by terpene or polyketide biosynthetic pathways. They were found with remarkable biological properties, mainly including antimicrobial, antitumor, and antiinflammatory properties. The continuous studies have significantly expanded the structural types and biological diversity of decalin-containing natural products. To provide a comprehensive understanding of recent advances in the chemistry and bioactivity of decalin-containing natural products, this review summarizes 532 new polyketide-type (77.4%) and isoprenoid-type decalins (22.6%) reported from both terrestrial and marine organisms between 2014 and 2025, along with their chemical synthesis, biosynthesis, and structure activity relationships. This review will shed light on further untapped potential pharmacological applications and drug discovery in human health based on decalin-containing natural products.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109549"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.bioorg.2026.109538
Xin Zhou , Qi Qin , Huizhi Yao , Yuxing Fu , Linxiao Wang , Wufu Zhu , Qiaoli Lv
Ataxia Telangiectasia and Rad3-related (ATR) kinase is a central orchestrator of the DNA replication stress response and a primary target for exploiting synthetic lethality in DDR-deficient cancers. This review systematically explores the molecular biology of ATR and the medicinal chemistry evolution of its inhibitors. We provide a detailed analysis of the structure-activity relationships (SAR) of leading clinical candidates, including berzosertib, ceralasertib, and elimusertib, focusing on strategic chemical modifications such as scaffold hopping and sulfoximine substitution to optimize selectivity and druggability. Furthermore, we critically examine the pharmacological limitations and developability hurdles associated with Proteolysis-Targeting Chimeras (PROTACs), while evaluating the progress of rational combination regimens in clinical trials. Critical challenges, specifically dose-limiting hematological toxicities and acquired resistance, are analyzed alongside the search for robust predictive biomarkers. By synthesizing current pharmacological and clinical data, this work outlines the trajectory for next-generation ATR-targeted precision medicine.
{"title":"ATR inhibitors: from targeting the DNA damage response to exploiting synthetic lethality—A paradigm shift in Cancer therapy","authors":"Xin Zhou , Qi Qin , Huizhi Yao , Yuxing Fu , Linxiao Wang , Wufu Zhu , Qiaoli Lv","doi":"10.1016/j.bioorg.2026.109538","DOIUrl":"10.1016/j.bioorg.2026.109538","url":null,"abstract":"<div><div>Ataxia Telangiectasia and Rad3-related (ATR) kinase is a central orchestrator of the DNA replication stress response and a primary target for exploiting synthetic lethality in DDR-deficient cancers. This review systematically explores the molecular biology of ATR and the medicinal chemistry evolution of its inhibitors. We provide a detailed analysis of the structure-activity relationships (SAR) of leading clinical candidates, including berzosertib, ceralasertib, and elimusertib, focusing on strategic chemical modifications such as scaffold hopping and sulfoximine substitution to optimize selectivity and druggability. Furthermore, we critically examine the pharmacological limitations and developability hurdles associated with Proteolysis-Targeting Chimeras (PROTACs), while evaluating the progress of rational combination regimens in clinical trials. Critical challenges, specifically dose-limiting hematological toxicities and acquired resistance, are analyzed alongside the search for robust predictive biomarkers. By synthesizing current pharmacological and clinical data, this work outlines the trajectory for next-generation ATR-targeted precision medicine.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109538"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.bioorg.2026.109543
Hongyue Wei , Bing Liu , Ting Zhu , Yuchen Liu , Lijing Zhang , Ning Chen , Wenlan Li
Chiral compounds are highly valuable in pharmaceuticals and materials because of their distinct stereostructures. However, traditional synthesis methods often encounter difficulties, such as demanding reaction conditions and substantial pollution. Biosynthetic technologies, harnessing the intrinsic features of enzymatic catalysis—such as high stereoselectivity and environmental benignity—have established themselves as a pivotal strategy to surmount these traditional limitations. This article reviews recent advances in biocatalytic synthesis of chiral compounds. Key developments include enzyme engineering for precise chiral center formation—through modification of oxidoreductases and lyases, and design of bifunctional and artificial enzymes—as well as photo- and electro-enzymatic catalysis that merge energy-driven processes with biocatalysis for efficient synthesis under mild conditions. Microbial engineering using engineered Escherichia. coli and yeast enables scalable production of chiral compounds, including chiral sesquiterpenes (e.g., (-)-β-elemene, drimenol, albicanol), chiral alkaloid precursors (e.g., (-)-dehydrobrevianamide E), and other high-value chiral intermediates, via optimized metabolic pathways. Mechanistic studies on imine reductases and amino acid dehydrogenases support rational enzyme design. Current technologies exhibit green characteristics, yet confront challenges such as enzyme stability. Looking ahead, the integration of interdisciplinary technologies is expected to drive the intellectualization and sustainability of chiral synthesis technologies.
{"title":"Advances in green technologies for biocatalytic synthesis of chiral compounds: from enzymatic catalysis to multidisciplinary collaborative innovation","authors":"Hongyue Wei , Bing Liu , Ting Zhu , Yuchen Liu , Lijing Zhang , Ning Chen , Wenlan Li","doi":"10.1016/j.bioorg.2026.109543","DOIUrl":"10.1016/j.bioorg.2026.109543","url":null,"abstract":"<div><div>Chiral compounds are highly valuable in pharmaceuticals and materials because of their distinct stereostructures. However, traditional synthesis methods often encounter difficulties, such as demanding reaction conditions and substantial pollution. Biosynthetic technologies, harnessing the intrinsic features of enzymatic catalysis—such as high stereoselectivity and environmental benignity—have established themselves as a pivotal strategy to surmount these traditional limitations. This article reviews recent advances in biocatalytic synthesis of chiral compounds. Key developments include enzyme engineering for precise chiral center formation—through modification of oxidoreductases and lyases, and design of bifunctional and artificial enzymes—as well as photo- and electro-enzymatic catalysis that merge energy-driven processes with biocatalysis for efficient synthesis under mild conditions. Microbial engineering using engineered <em>Escherichia. coli</em> and yeast enables scalable production of chiral compounds, including chiral sesquiterpenes (e.g., (-)-β-elemene, drimenol, albicanol), chiral alkaloid precursors (e.g., (-)-dehydrobrevianamide E), and other high-value chiral intermediates, via optimized metabolic pathways. Mechanistic studies on imine reductases and amino acid dehydrogenases support rational enzyme design. Current technologies exhibit green characteristics, yet confront challenges such as enzyme stability. Looking ahead, the integration of interdisciplinary technologies is expected to drive the intellectualization and sustainability of chiral synthesis technologies.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109543"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.bioorg.2026.109563
Huma Basheer , Chandra S. Azad , M. Samim , Imran A. Khan
Cholera toxin B subunit (CTB) is a validated target for anticholera therapeutics, but current inhibitors often suffer from synthetic complexity and limited tunability. This study aimed to develop a compact, tunable triazole scaffold exhibiting low-micromolar potency combined with high synthetic tractability. We applied a unified, QSAR-driven, multiscale computational-experimental workflow integrating molecular docking, induced fit docking (IFD), molecular dynamics (MD), QM/MM calculations, and descriptor-based QSAR modeling to prioritize a focused library of 44 N-sulfonyl triazole inhibitors.
QSAR modeling employed multiple regression techniques on molecular descriptors derived from E-Dragon software and quantum mechanical (QM/QM-MM) parameters. Models including Ordinary Linear Regression, LASSO, Ridge, Elastic Net, Random Forest, Support Vector Machine (SVM), and Gradient Boosting Machine (GBM) were developed. The best predictive performance was achieved by SVM (test R2 = 0.79, RMSE = 0.49) and Random Forest (test R2 = 0.77, RMSE = 0.52) on E-Dragon descriptors, while multiple linear regression yielded outstanding fits on QM descriptors (test R2 up to 0.98, RMSE ∼0.14). Key molecular descriptors influencing activity included hydrogen bond donor count (ndonr), polarizability (AlogP), and topological indices (Jhetv).
Guided by these QSAR models, lead candidates were synthesized via regioselective Cu(I)/Ru-catalyzed click chemistry, with experimental CTB-ELISA screening confirming compound 5d as the most potent inhibitor (IC₅₀ = 11.78 ± 1.2 μM). Computational studies consistently supported these findings, demonstrating favorable binding energetics, dynamic adaptability, and optimal electronic complementarity for lead compounds.
This integrated strategy not only delivers a potent, synthetically accessible monovalent CTB inhibitor but also provides a rational, data-driven platform for rapid design and optimization for multivalent cholera toxin antagonists with improved efficacy.
{"title":"Tunable triazole-based cholera toxin inhibitors: A QSAR-guided design and evaluation approach","authors":"Huma Basheer , Chandra S. Azad , M. Samim , Imran A. Khan","doi":"10.1016/j.bioorg.2026.109563","DOIUrl":"10.1016/j.bioorg.2026.109563","url":null,"abstract":"<div><div>Cholera toxin B subunit (CTB) is a validated target for anticholera therapeutics, but current inhibitors often suffer from synthetic complexity and limited tunability. This study aimed to develop a compact, tunable triazole scaffold exhibiting low-micromolar potency combined with high synthetic tractability. We applied a unified, QSAR-driven, multiscale computational-experimental workflow integrating molecular docking, induced fit docking (IFD), molecular dynamics (MD), QM/MM calculations, and descriptor-based QSAR modeling to prioritize a focused library of 44 N-sulfonyl triazole inhibitors.</div><div>QSAR modeling employed multiple regression techniques on molecular descriptors derived from <em>E</em>-Dragon software and quantum mechanical (QM/QM-MM) parameters. Models including Ordinary Linear Regression, LASSO, Ridge, Elastic Net, Random Forest, Support Vector Machine (SVM), and Gradient Boosting Machine (GBM) were developed. The best predictive performance was achieved by SVM (test R<sup>2</sup> = 0.79, RMSE = 0.49) and Random Forest (test R<sup>2</sup> = 0.77, RMSE = 0.52) on <em>E</em>-Dragon descriptors, while multiple linear regression yielded outstanding fits on QM descriptors (test R<sup>2</sup> up to 0.98, RMSE ∼0.14). Key molecular descriptors influencing activity included hydrogen bond donor count (ndonr), polarizability (AlogP), and topological indices (Jhetv).</div><div>Guided by these QSAR models, lead candidates were synthesized <em>via</em> regioselective Cu(I)/Ru-catalyzed click chemistry, with experimental CTB-ELISA screening confirming compound <strong>5d</strong> as the most potent inhibitor (IC₅₀ = 11.78 ± 1.2 μM). Computational studies consistently supported these findings, demonstrating favorable binding energetics, dynamic adaptability, and optimal electronic complementarity for lead compounds.</div><div>This integrated strategy not only delivers a potent, synthetically accessible monovalent CTB inhibitor but also provides a rational, data-driven platform for rapid design and optimization for multivalent cholera toxin antagonists with improved efficacy.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109563"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.bioorg.2026.109561
Esraa Z. Mohammed , Heba S. Rateb , Amira A. Helwa , Nourhan G. Naga , Mona E.M. Mabrouk , Ahmed B.M. Mehany , Hatem A. Abdel Aziz , Nehad M. El-Dydamony
The rapid emergence of antibiotic-resistant pathogens highlights the crucial need for alternate anti-infective strategies. Quorum sensing inhibition (QSI) offers compelling approaches to attenuate bacterial virulence while limiting the resistance. In this study, fourteen Benzo[d]imidazole derivatives were synthesized and proposed as potential LasR antagonists exhibiting quorum-sensing inhibitory activity. Among these, compounds 7f, 7h, 11b, 11c, and 11f demonstrated a marked ability to suppress biofilm formation in P. aeruginosa by (83%, 87%, 84%, 87%, 86%), pyocyanin production (76%, 84%, 86%, 82%, 81%), and motility activity; swimming (90%, 86%, 91%, 88%, 90%), twitching (90%, 94%, 93%, 86%, 92%), respectively. Additionally, compounds 7f and 11c effectively inhibited LasR, with IC50 values equal to 0.74 ± 0.005, 0.79 ± 0.001 μM, respectively. Moreover, a 200-ns molecular dynamics simulation (MDS) of the 7f analogue indicated its potential to disrupt the dimeric structure of the LasR protein, thereby confirming its inhibitory activity toward LasR. Collectively, these results establish benzo[d]imidazole scaffolds as promising leads for the development of next-generation quorum sensing modulators aimed at disarming bacterial pathogenicity and countering antimicrobial resistance.
{"title":"Design, regioselective, time gated synthesis of novel benzo[d]imidazole analogues as potential quorum sensing inhibitors targeting LasR in Pseudomonas aeruginosa","authors":"Esraa Z. Mohammed , Heba S. Rateb , Amira A. Helwa , Nourhan G. Naga , Mona E.M. Mabrouk , Ahmed B.M. Mehany , Hatem A. Abdel Aziz , Nehad M. El-Dydamony","doi":"10.1016/j.bioorg.2026.109561","DOIUrl":"10.1016/j.bioorg.2026.109561","url":null,"abstract":"<div><div>The rapid emergence of antibiotic-resistant pathogens highlights the crucial need for alternate anti-infective strategies. Quorum sensing inhibition (QSI) offers compelling approaches to attenuate bacterial virulence while limiting the resistance. In this study, fourteen <strong>Benzo[<em>d</em>]imidazole</strong> derivatives were synthesized and proposed as potential LasR antagonists exhibiting quorum-sensing inhibitory activity. Among these, compounds <strong>7f</strong>, <strong>7</strong> <strong>h</strong>, <strong>11b, 11c</strong>, and <strong>11f</strong> demonstrated a marked ability to suppress biofilm formation in <em>P. aeruginosa</em> by (83%, 87%, 84%, 87%, 86%), pyocyanin production (76%, 84%, 86%, 82%, 81%), and motility activity; swimming (90%, 86%, 91%, 88%, 90%), twitching (90%, 94%, 93%, 86%, 92%), respectively. Additionally, compounds <strong>7f</strong> and <strong>11c</strong> effectively inhibited LasR, with IC<sub>50</sub> values equal to 0.74 ± 0.005, 0.79 ± 0.001 μM, respectively. Moreover, a 200-ns molecular dynamics simulation (MDS) of the <strong>7f</strong> analogue indicated its potential to disrupt the dimeric structure of the LasR protein, thereby confirming its inhibitory activity toward LasR. Collectively, these results establish <strong>benzo[<em>d</em>]imidazole</strong> scaffolds as promising leads for the development of next-generation quorum sensing modulators aimed at disarming bacterial pathogenicity and countering antimicrobial resistance.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"171 ","pages":"Article 109561"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-25DOI: 10.1016/j.bioorg.2026.109546
Ya-Lan Wang , Wen-Zhe Nie , Feng-Zhi Lu , Jin-Ying Liu , Ji-Hang He , Ya-Mei Li , Xiaoting Li , Qing-Kun Shen
PARPi exerts synthetic lethality by exploiting homologous recombination repair (HRR) deficiencies in tumor cells, demonstrating breakthrough efficacy in the treatment of various cancers with BRCA mutations, and has thus become one of the cornerstone strategies in precision oncology. However, primary insensitivity and acquired resistance observed in clinical practice significantly limit its long-term therapeutic benefits. Cyclin-dependent kinases (CDKs), as critical regulators of cell cycle progression and DNA damage repair pathways, represent promising therapeutic targets for overcoming PARPi resistance and enhancing treatment sensitivity. Through modulation of HRR-related gene transcription, activation of cell cycle checkpoints, and regulation of pro-survival signaling pathways in tumors, CDKs play a pivotal role in mediating these effects.This article systematically reviews the core mechanisms underlying the synergistic interaction between CDK inhibitors (CDKi) and PARPi. From a translational perspective, multiple clinical trials have confirmed the safety and preliminary efficacy of this combination strategy in solid tumors, particularly demonstrating synergistic antitumor activity in settings of PARPi resistance or in tumors with intact HRR function. The combinatorial approach of CDKi and PARPi, through multi-dimensional mechanistic integration, holds strong potential as a key strategy to overcome PARPi resistance and expand the population of patients who can benefit from this class of therapies.
{"title":"Is it feasible for CDKs inhibitors to herald a new era in tackling the low sensitivity and drug resistance associated with PARP inhibitors?","authors":"Ya-Lan Wang , Wen-Zhe Nie , Feng-Zhi Lu , Jin-Ying Liu , Ji-Hang He , Ya-Mei Li , Xiaoting Li , Qing-Kun Shen","doi":"10.1016/j.bioorg.2026.109546","DOIUrl":"10.1016/j.bioorg.2026.109546","url":null,"abstract":"<div><div>PARPi exerts synthetic lethality by exploiting homologous recombination repair (HRR) deficiencies in tumor cells, demonstrating breakthrough efficacy in the treatment of various cancers with BRCA mutations, and has thus become one of the cornerstone strategies in precision oncology. However, primary insensitivity and acquired resistance observed in clinical practice significantly limit its long-term therapeutic benefits. Cyclin-dependent kinases (CDKs), as critical regulators of cell cycle progression and DNA damage repair pathways, represent promising therapeutic targets for overcoming PARPi resistance and enhancing treatment sensitivity. Through modulation of HRR-related gene transcription, activation of cell cycle checkpoints, and regulation of pro-survival signaling pathways in tumors, CDKs play a pivotal role in mediating these effects.This article systematically reviews the core mechanisms underlying the synergistic interaction between CDK inhibitors (CDKi) and PARPi. From a translational perspective, multiple clinical trials have confirmed the safety and preliminary efficacy of this combination strategy in solid tumors, particularly demonstrating synergistic antitumor activity in settings of PARPi resistance or in tumors with intact HRR function. The combinatorial approach of CDKi and PARPi, through multi-dimensional mechanistic integration, holds strong potential as a key strategy to overcome PARPi resistance and expand the population of patients who can benefit from this class of therapies.</div></div>","PeriodicalId":257,"journal":{"name":"Bioorganic Chemistry","volume":"172 ","pages":"Article 109546"},"PeriodicalIF":4.7,"publicationDate":"2026-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}