Bioconjugate Chemistry最新文献

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Correction to "3D Printed Multifunctional Ti6Al4V-Based Hybrid Scaffold for the Management of Osteosarcoma". 更正“3D打印多功能ti6al4v复合支架治疗骨肉瘤”。
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-16 DOI: 10.1021/acs.bioconjchem.4c00585
Bianyun Cai, Leizhen Huang, Jingcheng Wang, Dan Sun, Ce Zhu, Yong Huang, Shujun Li, Zhijun Guo, Limin Liu, Ganjun Feng, Yubao Li, Li Zhang
{"title":"Correction to \"3D Printed Multifunctional Ti<sub>6</sub>Al<sub>4</sub>V-Based Hybrid Scaffold for the Management of Osteosarcoma\".","authors":"Bianyun Cai, Leizhen Huang, Jingcheng Wang, Dan Sun, Ce Zhu, Yong Huang, Shujun Li, Zhijun Guo, Limin Liu, Ganjun Feng, Yubao Li, Li Zhang","doi":"10.1021/acs.bioconjchem.4c00585","DOIUrl":"10.1021/acs.bioconjchem.4c00585","url":null,"abstract":"","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"309-310"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142996104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modular Synthesis of Anti-HER2 Dual-Drug Antibody-Drug Conjugates Demonstrating Improved Toxicity. 抗her2双药抗体-药物偶联物的模块化合成证明了更高的毒性。
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-22 DOI: 10.1021/acs.bioconjchem.4c00398
Christine S Nervig, Megan Rice, Marcello Marelli, R James Christie, Shawn C Owen
{"title":"Modular Synthesis of Anti-HER2 Dual-Drug Antibody-Drug Conjugates Demonstrating Improved Toxicity.","authors":"Christine S Nervig, Megan Rice, Marcello Marelli, R James Christie, Shawn C Owen","doi":"10.1021/acs.bioconjchem.4c00398","DOIUrl":"10.1021/acs.bioconjchem.4c00398","url":null,"abstract":"<p><p>Antibodies have gained clinical success in the last two decades for the targeted delivery of highly toxic small molecule chemotherapeutics. Yet antibody-drug conjugates (ADCs) often fail in the clinic due to the development of resistance. The delivery of two mechanistically distinct small molecule drugs on one antibody is of increasing interest to overcome these challenges with single-drug ADCs. We have developed a modular synthetic strategy for the construction of a library of 19 dual-drug ADCs where drugs are conjugated through unnatural cyclopentadiene-containing amino acids and native cysteine residues on an anti-HER2 trastuzumab scaffold. Importantly, this strategy utilizes the same functional group on the linker-drug construct; this allows for the facile addition of drugs at either conjugation site and enables the evaluation of different drug-to-antibody ratios and combinations of drug pairs. We tested the library on high- and mid-HER2 expressing cell lines and observed increased toxicity in several dual-drug ADCs compared with single-drug constructs. The strategy developed herein provides a method for the facile synthesis, characterization, and evaluation of dual-payload ADCs. Simultaneous delivery of combinations of drugs with distinct mechanisms of action is critical for the next generation of targeted drug delivery.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"190-202"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142996185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PEGylation of Dipeptide Linker Improves Therapeutic Index and Pharmacokinetics of Antibody-Drug Conjugates. 二肽连接物的聚乙二醇化改善了抗体-药物偶联物的治疗指标和药代动力学。
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-20 DOI: 10.1021/acs.bioconjchem.4c00392
Jing Long, Ting Shao, Yongmei Wang, Tianzhi Chen, Yuning Chen, Yi-Li Chen, Qi Wang, Xiong Yu, Jinghua Yu, Kaifeng He, Han-Bin Lin, Xingxing Diao, Guifeng Wang, Chunhe Wang
{"title":"PEGylation of Dipeptide Linker Improves Therapeutic Index and Pharmacokinetics of Antibody-Drug Conjugates.","authors":"Jing Long, Ting Shao, Yongmei Wang, Tianzhi Chen, Yuning Chen, Yi-Li Chen, Qi Wang, Xiong Yu, Jinghua Yu, Kaifeng He, Han-Bin Lin, Xingxing Diao, Guifeng Wang, Chunhe Wang","doi":"10.1021/acs.bioconjchem.4c00392","DOIUrl":"10.1021/acs.bioconjchem.4c00392","url":null,"abstract":"<p><p>Hydrophobic payloads incorporated into antibody-drug conjugates (ADCs) typically are superior to hydrophilic ones in tumor penetration and \"bystander killing\" upon release from ADCs. However, they are prone to aggregation and accelerated plasma clearance, which lead to reduced efficacies and increased toxicities of ADC molecules. Shielding the hydrophobicity of payloads by incorporating polyethylene glycol (PEG) elements or sugar groups into the ADC linkers has emerged as a viable alternative to directly adopting hydrophilic payloads. In this study, ADC linkers incorporating PEG or sugar groups were synthesized by modifying dipeptide linkers, with hydrophobic monomethyl auristatin E (MMAE) serving as an exemplary hydrophobic payload. All drug-linkers (DLs) were conjugated to RS7, a humanized antibody targeting Trop-2, with drug-to-antibody ratio (DAR) values set at 4 or 8. Among these, the ADC molecule RS7-DL 11, featuring a methyl-PEG<sub>24</sub> (mPEG<sub>24</sub>) moiety as a side chain to the Valine-Lysine-PAB (VK) linker, demonstrated maximum hydrophilicity, biophysical stability, and tumor suppression, along with prolonged half-life and enhanced animal tolerability. In conclusion, through PEGylation of the traditional dipeptide linker, we have demonstrated an optimized ADC conjugation technology that can be employed for conjugating ultrahydrophobic payloads, thus enhancing both the therapeutic index and pharmacokinetics profile.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"179-189"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142996192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thymidine Phosphodiester Chemiluminescent Probe for Sensitive and Selective Detection of Ectonucleotide Pyrophosphatase 1. 胸苷磷酸二酯化学发光探针灵敏选择性检测外核苷酸焦磷酸酶1。
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-09 DOI: 10.1021/acs.bioconjchem.4c00454
Omri Shelef, Sara Gutkin, Molhm Nassir, Anne Krinsky, Ronit Satchi-Fainaro, Phil S Baran, Doron Shabat
{"title":"Thymidine Phosphodiester Chemiluminescent Probe for Sensitive and Selective Detection of Ectonucleotide Pyrophosphatase 1.","authors":"Omri Shelef, Sara Gutkin, Molhm Nassir, Anne Krinsky, Ronit Satchi-Fainaro, Phil S Baran, Doron Shabat","doi":"10.1021/acs.bioconjchem.4c00454","DOIUrl":"10.1021/acs.bioconjchem.4c00454","url":null,"abstract":"<p><p>ENPP-1 is a transmembrane enzyme involved in nucleotide metabolism, and its overexpression is associated with various cancers, making it a potential therapeutic target and biomarker for early tumor diagnosis. Current detection methods for ENPP-1 utilize a colorimetric probe, <b>TMP-</b><i><b>p</b></i><b>NP</b>, which has significant limitations in sensitivity. Here, we present probe <b>CL-ENPP-1</b>, the first nucleic acid-based chemiluminescent probe designed for rapid and highly sensitive detection of ENPP-1 activity. The design of probe <b>CL-ENPP-1</b> features a phenoxy-adamantyl-1,2-dioxetane luminophore linked to thymidine via a phosphodiesteric bond. Upon cleavage of the enzymatic substrate by ENPP-1, the probe undergoes an efficient chemiexcitation process to emit a green photon. Probe <b>CL-ENPP-1</b> demonstrates an exceptional signal-to-noise ratio of 15000 and a limit of detection value approximately 4500-fold lower than the widely used colorimetric probe <b>TMP-</b><i><b>p</b></i><b>NP</b>. A comparison of <b>TMP-</b><i><b>p</b></i><b>NP</b> activation by ENPP-1 versus alkaline phosphatase (ALP) reveals a complete lack of selectivity. Removal of the self-immolative spacer from probe <b>CL-ENPP-1</b> resulted in a new chemiluminescent probe, <b>CL-ENPP-2</b>, with an 18.4-fold increase in selectivity for ENPP-1 over ALP. The ability of probe <b>CL-ENPP-2</b> to detect ENPP-1 activity in mammalian cells was assessed using the human breast cancer cell line MDA-MB-231. This probe demonstrated a 19.5-fold improvement in the signal-to-noise ratio, highlighting its superior ability to detect ENPP-1 activity in a biological sample. As far as we know, to date, <b>CL-ENPP-1</b> and <b>CL-ENPP-2</b> are the most sensitive probes for the detection of ENPP-1 catalytic activity. We anticipate that our new chemiluminescent probes will be valuable for various applications requiring ENPP-1 detection, including enzyme inhibitor-based drug discovery assays. The insights gained from our probe design principles could advance the development of more selective probes for ENPP-1 and contribute to future innovations in chemiluminescence research.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"152-159"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11843602/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for Screening Sodium Cyanoborohydride for Free Cyanide Content and Its Impact on Bioconjugation Chemistry.
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-02-06 DOI: 10.1021/acs.bioconjchem.4c00514
Jarrod P Cohen, Adam DiCaprio, Jian He, Mikhail Reibarkh, James Small, Matthew Schombs
{"title":"Method for Screening Sodium Cyanoborohydride for Free Cyanide Content and Its Impact on Bioconjugation Chemistry.","authors":"Jarrod P Cohen, Adam DiCaprio, Jian He, Mikhail Reibarkh, James Small, Matthew Schombs","doi":"10.1021/acs.bioconjchem.4c00514","DOIUrl":"10.1021/acs.bioconjchem.4c00514","url":null,"abstract":"<p><p>Sodium cyanoborohydride (CBH) is commonly used as a mild reducing agent in the reductive amination of aldehydes and free amines. Within the pharmaceutical industry, this reaction is employed in the bioconjugation of proteins and peptides. Free cyanide species such as HCN and NaCN are known residual impurities in CBH that can contribute to the formation of undesired side products including cyanoamines and cyanohydrins. In commercial processes, the potential for bound cyanated species requires an analytical control strategy to monitor and mitigate any risk to human health. Given these concerns, minimization of cyanated side products is of utmost priority and can be achieved through a robust control strategy of quantitative screening of starting materials for free cyanide. Alternative risk mitigation strategies such as purification of bound cyanide containing species to pure species are less effective due to minor chemical differences between the expected product and bound cyanide species. Herein, we present a simple chromatographic assay for the quantitation of free cyanide in the raw material sodium cyanoborohydride. Method development, robustness evaluation, and scientific soundness assessment are reported with excellent linearity, accuracy, precision, and specificity. Additionally, this method was applied for the evaluation of raw material supplied from 10 commercial sources, none of which report a specification for free cyanide within their certificate of analysis. The measured free cyanide from these vendors ranged from 8 to 80 mM concentration, thereby confirming the value of screening these raw materials. Finally, we demonstrate the impact of free cyanide on a model bioconjugation reaction between ornithine and glyceraldehyde.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"245-252"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11843608/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143254206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of Transiently Strainable Benzocycloheptenes for Catalyst-Free, Visible-Light-Mediated [3 + 2]-Cycloadditions.
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-02-04 DOI: 10.1021/acs.bioconjchem.4c00595
Shivangi Kharbanda, Osaid Alkhamayseh, Georgia Eastham, Jimmie D Weaver
{"title":"Development of Transiently Strainable Benzocycloheptenes for Catalyst-Free, Visible-Light-Mediated [3 + 2]-Cycloadditions.","authors":"Shivangi Kharbanda, Osaid Alkhamayseh, Georgia Eastham, Jimmie D Weaver","doi":"10.1021/acs.bioconjchem.4c00595","DOIUrl":"10.1021/acs.bioconjchem.4c00595","url":null,"abstract":"<p><p>Dynamic photogeneration of ephemeral and reactive species is enabling for chemical reactions, providing spatial and temporal control. A previous study from our group established the ability of 6,7-dihydro-5H-benzo[7]annulene, benzocycloheptene (<b>BC7</b>), to convert photochemical energy into ring strain, enabling the rapid cycloaddition of alkyl azides with the reversibly formed and transient <i>trans</i>-isomer, affording versatile nonaromatic triazolines. Despite the conceptual advances of the previous study, some challenges remained: the fragility of the triazoline products, the low regioselectivity for the cycloaddition, a need for an iridium-based photosensitizer and organic-based solvents, and a lack of convenient linchpin functional group handles. Herein, we communicate the development of a second generation of <b>BC7</b> molecules that overcome the issues of the first generation. A method to convert fragile triazoline products to stable triazoles was developed. The alkene component was polarized with a carbonyl group, dramatically improving the regioselectivity while simultaneously red-shifting the absorbance of the cycloalkene into the visible region, which was expected to facilitate direct excitation and eliminate the need for photocatalysts. However, experiments indicated that the cycloaddition involved passage through a triplet manifold, complicating the direct excitation strategy. This was successfully overcome by attaching a bromine atom directly to the alkene moiety, which accelerated singlet-to-triplet intersystem crossing by the heavy atom effect. Further exploration identified sites of substitution that can increase the water solubility and provide a handle for the loading of chemical tools and probes.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"302-308"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11843616/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Unique Prodrug Targeting the Prostate-Specific Membrane Antigen for the Delivery of Monomethyl Auristatin E.
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-29 DOI: 10.1021/acs.bioconjchem.4c00297
Hunter N Bomba, Melody D Fulton, Emily A Savoy, Beatrice Langton-Webster, Clifford E Berkman
{"title":"A Unique Prodrug Targeting the Prostate-Specific Membrane Antigen for the Delivery of Monomethyl Auristatin E.","authors":"Hunter N Bomba, Melody D Fulton, Emily A Savoy, Beatrice Langton-Webster, Clifford E Berkman","doi":"10.1021/acs.bioconjchem.4c00297","DOIUrl":"10.1021/acs.bioconjchem.4c00297","url":null,"abstract":"<p><p>Monomethyl auristatin E (MMAE) is a promising treatment option for patients diagnosed with prostate cancer (PCa); however, toxicities prevent MMAE from being administered as free drug. No MMAE-based treatment is currently marketed for PCa. Herein, we describe a small-molecule-drug conjugate, CTT2274, for the selective delivery of MMAE. CTT2274 is composed of a prostate-specific membrane antigen (PSMA)-binding scaffold, a biphenyl motif, a pH-sensitive phosphoramidate linker, and MMAE payload. We demonstrate that CTT2274 shows selective binding to PSMA, which is overexpressed on PCa cells, and induces tumor cell death <i>in vitro</i>. In a patient-derived xenograft tumor model of PCa in mice, we show that weekly intravenous dosing of CTT2274 at 3.6 mg/kg for six weeks is superior to treatment with free MMAE at equivalent doses. Mice treated with CTT2274 experienced prolonged tumor suppression and significantly greater overall survival than mice treated with PBS. Additionally, the safety of CTT2274 compared to an equivalent dose of MMAE was assessed in healthy, non-tumor-bearing mice. Our results demonstrate that CTT2274 therapy is as efficacious as MMAE, results in superior overall survival, and has a more favorable safety profile. Together, these data indicate that CTT2274 is a candidate for clinical translation for the treatment of PCa.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"169-178"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unlocking the Potential of Antimicrobial Peptides: Cutting-Edge Advances and Therapeutic Potential in Combating Bacterial Keratitis.
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 DOI: 10.1021/acs.bioconjchem.4c00594
Bingru Xiao, Jie Wang, Jie Xing, Lulu He, Chen Xu, Aiguo Wu, Juan Li
{"title":"Unlocking the Potential of Antimicrobial Peptides: Cutting-Edge Advances and Therapeutic Potential in Combating Bacterial Keratitis.","authors":"Bingru Xiao, Jie Wang, Jie Xing, Lulu He, Chen Xu, Aiguo Wu, Juan Li","doi":"10.1021/acs.bioconjchem.4c00594","DOIUrl":"https://doi.org/10.1021/acs.bioconjchem.4c00594","url":null,"abstract":"<p><p>Bacterial keratitis is a prevalent, and severe corneal illness resulting from bacterial pathogens. Failure to administer a timely and suitable therapy may lead to corneal opacity, ulceration, significant vision impairment, or potential blindness. Current clinical interventions for bacterial keratitis involve the administration of topical antimicrobial agents and systemic antibiotics. However, the misuse and overuse of antibiotics have led to the rapid emergence of antibiotic-resistant bacteria. Additionally, the restricted antibacterial spectrum and possible adverse effects of antibiotics have provided considerable obstacles to traditional therapies. This highlights the urgent need for novel and highly effective antimicrobial agents. Antimicrobial peptides (AMPs) are a class of naturally occurring or synthetically designed small molecules that have gained significant attention due to their unique antimicrobial mechanisms and low risk of resistance development. AMPs exhibit promising potential in treating bacterial keratitis through direct antibacterial mechanisms, such as inhibiting cell wall synthesis, disrupting cell membranes, and interfering with nucleic acid metabolism, as well as indirect mechanisms, including modulation of the host immune response. This review provides a comprehensive overview of the antibacterial mechanisms of AMPs and their advancements in the treatment of bacterial keratitis. It emphasizes the role of various modification strategies and artificial-intelligence-assisted design in enhancing the antibacterial efficacy, stability, and biocompatibility of AMPs. Furthermore, this review discusses the latest progress in combining AMPs with delivery systems for improved therapeutic outcomes. Finally, the review highlights the current challenges and future perspectives of AMPs in bacterial keratitis treatment, providing valuable insights for developing novel AMPs with high antibacterial efficacy, stability, and safety for bacterial keratitis therapies.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum Dot Erythropoietin Bioconjugates Enhance EPO-Receptor Clustering on Transfected Human Embryonic Kidney Cells. 量子点促红细胞生成素生物偶联物增强转染人胚胎肾细胞的epo受体聚类。
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-21 DOI: 10.1021/acs.bioconjchem.4c00521
Ryan N Porell, Okhil K Nag, Michael H Stewart, Kimihiro Susumu, Eunkeu Oh, James B Delehanty
{"title":"Quantum Dot Erythropoietin Bioconjugates Enhance EPO-Receptor Clustering on Transfected Human Embryonic Kidney Cells.","authors":"Ryan N Porell, Okhil K Nag, Michael H Stewart, Kimihiro Susumu, Eunkeu Oh, James B Delehanty","doi":"10.1021/acs.bioconjchem.4c00521","DOIUrl":"10.1021/acs.bioconjchem.4c00521","url":null,"abstract":"<p><p>Erythropoietin (EPO)-induced cellular signaling through the EPO receptor (EPOR) is a fundamental pathway for the modulation of cellular behavior and activity. In our previous work, we showed in primary human astrocytes that the multivalent display of EPO on the surface of semiconductor quantum dots (QDs) mediates augmented JAK/STAT signaling, a concomitant 1.8-fold increase in the expression of aquaporin-4 (AQPN-4) channel proteins, and a 2-fold increase in the AQPN-4-mediated water transport activity. Our hypothesis is that this enhanced signaling involves the simultaneous ligation and clustering of EPOR by QD-EPO conjugates. Here, we utilized a human embryonic kidney (HEK 293T/17) cell line transfected with EPOR fused to enhanced green fluorescent protein (eGFP) to visualize EPOR clustering. We demonstrate that QDs displaying five copies of EPO (bearing a C-terminal 6-histidine tract) on the nanoparticle surface induce a 1.8-fold increase in EPOR clustering compared to monomeric EPO at the same concentration. Our findings confirm the critical role played by the multivalent display of EPO in mediating clustering of the EPOR. More generally, these results illustrate the capability of nanoparticle-growth factor bioconjugates to control the activity of cognate receptors and the important role played by multivalent display in the modulation of selective cellular delivery and signaling.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"160-168"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142996195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Biological Evaluation of Bile Acid-Triclosan Conjugates: A Study on Antibacterial, Antibiofilm, and Molecular Docking.
IF 4 2区 化学
Bioconjugate Chemistry Pub Date : 2025-02-19 Epub Date: 2025-01-22 DOI: 10.1021/acs.bioconjchem.4c00539
Neha V Rathod, Satyendra Mishra
{"title":"Synthesis and Biological Evaluation of Bile Acid-Triclosan Conjugates: A Study on Antibacterial, Antibiofilm, and Molecular Docking.","authors":"Neha V Rathod, Satyendra Mishra","doi":"10.1021/acs.bioconjchem.4c00539","DOIUrl":"10.1021/acs.bioconjchem.4c00539","url":null,"abstract":"<p><p>This work describes the synthesis, characterization, and antibacterial properties of four bile acid-triclosan conjugates. The in vitro antibacterial activity of synthetic bile acid-triclosan conjugates was investigated against a panel of Gram-positive and Gram-negative bacteria. Conjugates <b>3</b> and <b>4</b> show high activity against <i>Escherichia coli</i> (ATCC25922), with IC<sub>50</sub> values of 2.94 ± 0.7 and 1.51 ± 0.05 μM, respectively. Conjugate <b>4</b> demonstrated 9 times the activity of triclosan (6.77 μM) and 18 times the potency of kanamycin, a well-known antibiotic. Compound <b>3</b> showed higher potential activity against all evaluated strains, including <i>Bacillus megaterium</i> (IC<sub>50</sub>: 3.05 ± 0.02), <i>Bacillus amyloquefaciens</i> (IC<sub>50</sub>: 8.79 ± 0.01), <i>Serratia marcescens</i> (IC<sub>50</sub>: 6.77 ± 0.4), and <i>E. coli</i> (IC<sub>50</sub>: 1.51 ± 0.05 μM). These findings indicate that it has broad-spectrum antibacterial activity. Bile acid-triclosan conjugates prevent biofilms by up to 99% at low doses (conjugates <b>4</b>; 4.16 ± 0.8 μM), compared to triclosan. Conjugate <b>5</b> was most potent against <i>B. amyloquefaciens</i> (IC<sub>50</sub> = 5.23 ± 0.2 μM), while conjugate <b>4</b> was most effective against <i>B. megaterium</i> (IC<sub>50</sub> = 4.16 ± 0.8 μM) in biofilm formation. These conjugates inhibit biofilm formation by limiting the extracellular polymeric substance generation. The in vitro antibacterial study revealed that bile acid-triclosan conjugates were more effective than the parent molecule triclosan at inhibiting bacterial growth and biofilm formation against both Gram-positive and Gram-negative bacteria.</p>","PeriodicalId":29,"journal":{"name":"Bioconjugate Chemistry","volume":" ","pages":"276-290"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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