Colloids and Surfaces B: Biointerfaces最新文献

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Dandelion inspired microparticles with highly efficient drug delivery to deep lung 以蒲公英为灵感的微颗粒可高效地向肺深部递送药物。
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-31 DOI: 10.1016/j.colsurfb.2024.114134
{"title":"Dandelion inspired microparticles with highly efficient drug delivery to deep lung","authors":"","doi":"10.1016/j.colsurfb.2024.114134","DOIUrl":"10.1016/j.colsurfb.2024.114134","url":null,"abstract":"<div><p>Active pharmaceutical ingredient (API) embedded dry powder for inhalation (AeDPI) shows higher drug loading and delivery dose for directly treating various lung infections. Inspired by the dandelion, we propose a novel kind of AeDPI microparticle structure fabricated by spray freeze drying technology, which would potentially enhance the alveoli deposition efficiency. When inhaling, such microparticles are expected to be easily broken-up into fragments containing API that acts as ‘seed’ and could be delivered to alveoli aided by the low density ‘pappus’ composed of excipient. Herein, itraconazole (ITZ), a first-line drug for treating pulmonary aspergillosis, was selected as model API. TPGS, an amphiphilic surfactant, was used to achieve stable primary ITZ nanocrystal (INc) suspensions for spray freeze drying. A series of microparticles were prepared, and the dandelion-like structure was successfully achieved. The effects of feed liquid compositions and freezing parameters on the microparticle size, morphology, surface energy, crystal properties and <em>in vitro</em> aerosol performance were systematically investigated. The optimal sample (SF<sub>(-50)</sub>D-INc<sub>7</sub>Leu<sub>3</sub>-2) in one-way experiment showed the highest fine particle fraction of ∼ 68.96 % and extra fine particle fraction of ∼ 36.87 %, equivalently ∼ 4.60 mg and ∼ 2.46 mg could reach the lung and alveoli, respectively, when inhaling 10 mg dry powders. The response surface methodology (RSM) analysis provided the optimized design space for fabricating microparticles with higher deep lung deposition performance. This study demonstrates the advantages of AeDPI microparticle with dandelion-like structure on promoting the delivery efficiency of high-dose drug to the deep lung.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141911008","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}
引用次数: 0
Langmuir monolayers provide an effective strategy for studying molecular recognition of nucleobases using alkylated nucleotides 朗缪尔单层膜为使用烷基化核苷酸研究核碱基的分子识别提供了一种有效的策略。
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-30 DOI: 10.1016/j.colsurfb.2024.114129
{"title":"Langmuir monolayers provide an effective strategy for studying molecular recognition of nucleobases using alkylated nucleotides","authors":"","doi":"10.1016/j.colsurfb.2024.114129","DOIUrl":"10.1016/j.colsurfb.2024.114129","url":null,"abstract":"<div><p>Molecular Recognition in nucleotides is crucial for medicine, underpinning precise interactions in genetic replication and therapy. Alkylated nucleotides, in particular, play a key role in modifying DNA to inhibit cancer cell growth. In this study, we focused on an alkylated nucleotide, PNM2 (3′,4′,6’-O-tristearoyl uridine or uridine tri-stearate), to investigate the interaction between adenine molecules in the aqueous subphase and PNM2 Langmuir monolayers. Utilizing techniques such as tensiometry, Brewster angle microscopy, infrared spectroscopy, surface potential measurements, and dilatational surface rheology, we found compelling evidence of molecular Recognition between the polar head of the insoluble amphiphile (uridine) in the monolayer and adenine in the aqueous subphase, attributed to hydrogen bonding. These interactions significantly influenced the physicochemical properties of the air-water interface, including monolayer expansion upon molecular recognition, decreased dilatational modulus, increased tensiometric stability of the monolayer when compressed to relevant surface pressures, and decreased surface potential. These findings are noteworthy for drug development, providing crucial insights into the mechanisms of nucleotide interactions.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141911009","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}
引用次数: 0
Surface-modified, zinc-incorporated mesoporous silica nanoparticles with improved antibacterial and rapid hemostatic properties 表面修饰的锌掺杂介孔二氧化硅纳米粒子具有更好的抗菌和快速止血性能。
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-30 DOI: 10.1016/j.colsurfb.2024.114132
{"title":"Surface-modified, zinc-incorporated mesoporous silica nanoparticles with improved antibacterial and rapid hemostatic properties","authors":"","doi":"10.1016/j.colsurfb.2024.114132","DOIUrl":"10.1016/j.colsurfb.2024.114132","url":null,"abstract":"<div><p>Severe bleeding and bacterial infections pose significant challenges to the global public health. Effective hemostatic materials have the potential to be used for rapid control of bleeding at the wound site. In this study, mesoporous silica nanoparticles (MSN) were doped with zinc ions (MSN@Zn) and subsequently functionalized with carboxyl (-COOH) groups through post-grafting, resulting in (MSN@Zn-COOH). The results demonstrated the successful functionalization of carboxyl groups on the surface of MSN@Zn mesoporous materials with minimal impact on the morphology. The released zinc ions showed potent antibacterial activity (above ∼80 %) against <em>Escherichia coli (E. coli)</em> and <em>Staphylococcus aureus (S. aureus). In vitro</em> and <em>in vivo</em> assessments of MSN@Zn-COOH revealed excellent hemostatic effects and favorable blood compatibility. Hemolysis percentages associated with MSN@Zn-COOH exhibited noteworthy reductions in comparison to MSN. Furthermore, a decrease in APTT (a test evaluating the intrinsic coagulation pathway) of modified MSN@Zn indicated enhanced hemostasis, supported by their negative zeta potential (∼ –14 to –43 mV). Importantly, all samples showed no cytotoxicity. This work underscores the potential of MSN@Zn-COOH, with its combined hemostatic performance and antibacterial activity, for emergency clinical applications.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141878062","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}
引用次数: 0
Photodynamic therapy based on bismuth oxyiodide nanoparticles for nondestructive tooth whitening 基于氧碘化铋纳米粒子的光动力疗法用于无损牙齿美白。
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-30 DOI: 10.1016/j.colsurfb.2024.114133
{"title":"Photodynamic therapy based on bismuth oxyiodide nanoparticles for nondestructive tooth whitening","authors":"","doi":"10.1016/j.colsurfb.2024.114133","DOIUrl":"10.1016/j.colsurfb.2024.114133","url":null,"abstract":"<div><p>Achieving a desired whitening effect through short treatments without using peroxide and without compromising the integrity of tooth enamel remains a challenge in teeth whitening. Here, we developed a highly safe and efficient photodynamic therapy (PDT) strategy based on visible light-activated bismuth oxyiodide nanoparticles for nondestructive tooth whitening. The Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub> nanoparticles (NPs) exhibited efficient photocatalytic activity owing to their narrow band gap, effectively harnessing the broad spectrum of visible light to generate ample electrons and holes. Meanwhile, the presence of oxygen vacancies, low oxidation state Bi<sup>3+</sup> and the high specific surface area endow Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub> NPs with effective electron-hole separation ability and potent redox potentials. Empowered by these characteristics, Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub> NPs effectively catalyzed O<sub>2</sub> into radicals (O<sub>2</sub><sup>•-</sup>), facilitating the degradation of dental surface pigment molecules for tooth whitening. Concurrently, they eradicated oral bacteria and bacterial biofilms adhering to tooth surfaces, thereby having a positive effect on the effectiveness of tooth whitening. This PDT strategy with Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub> NPs shows broad application prospects in tooth whitening.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141887841","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}
引用次数: 0
Release of ions enhanced the antibacterial performance of laser-generated, uncoated Ag nanoparticles 离子释放增强了激光生成的无涂层银纳米粒子的抗菌性能。
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-29 DOI: 10.1016/j.colsurfb.2024.114131
{"title":"Release of ions enhanced the antibacterial performance of laser-generated, uncoated Ag nanoparticles","authors":"","doi":"10.1016/j.colsurfb.2024.114131","DOIUrl":"10.1016/j.colsurfb.2024.114131","url":null,"abstract":"<div><p>Identifying the antibacterial mechanisms of elemental silver at the nanoscale remains a significant challenge due to the intertwining behaviors between the particles and their released ions. The open question is which of the above factor dominate the antibacterial behaviors when silver nanoparticles (Ag NPs) with different sizes. Considering the high reactivity of Ag NPs, prior research has primarily concentrated on coated particles, which inevitably hinder the release of Ag<sup>+</sup> ions due to additional chemical agents. In this study, we synthesized various Ag NPs, both coated and uncoated, using the laser ablation in liquids (LAL) technique. By analyzing both the changes in particle size and Ag<sup>+</sup> ions release, the impacts of various Ag NPs on the cellular activity and morphological changes of gram-negative (<em>E. coil</em>) and gram-positive (<em>S. aureus</em>) bacteria were evaluated. Our findings revealed that for uncoated Ag NPs, smaller particles exhibited greater ions release efficiency and enhanced antibacterial efficacy. Specifically, particles approximately 1.5 nm in size released up to 55 % of their Ag<sup>+</sup> ions within 4 h, significantly inhibiting bacterial growth. Additionally, larger particles tended to aggregate on the bacterial cell membrane surface, whereas smaller particles were more likely to be internalized by the bacteria. Notably, treatment with smaller Ag NPs led to more pronounced bacterial morphological changes and elevated levels of intracellular reactive oxygen species (ROS). We proposed that the bactericidal activity of Ag NPs stems from the synergistic effect between particle-cell interaction and the ionic silver, which is dependent on the crucial parameter of particle size.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141878061","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}
引用次数: 0
An injectable composite hydrogel containing polydopamine-coated curcumin nanoparticles and indoximod for the enhanced combinational chemo-photothermal-immunotherapy of breast tumors 一种含有聚多巴胺包裹的姜黄素纳米颗粒和吲哚西莫德的可注射复合水凝胶,用于增强乳腺肿瘤的化疗-光热-免疫联合疗法
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-28 DOI: 10.1016/j.colsurfb.2024.114130
{"title":"An injectable composite hydrogel containing polydopamine-coated curcumin nanoparticles and indoximod for the enhanced combinational chemo-photothermal-immunotherapy of breast tumors","authors":"","doi":"10.1016/j.colsurfb.2024.114130","DOIUrl":"10.1016/j.colsurfb.2024.114130","url":null,"abstract":"<div><p>The complexity and compensatory evolution of tumors weaken the effectiveness of single antitumor therapies. Therefore, multimodal combination therapies hold great promise in defeating tumors. Herein, we constructed a multi-level regulatory co-delivery system based on chemotherapy, phototherapy, and immunotherapy. Briefly, curcumin (Cur) was prepared as nanoparticles and coated with polydopamine (PDA) to form PCur-NPs, which along with an immune checkpoint inhibitor (indoximod, IND) were then loaded into a thermosensitive Pluronic F127 (F127) hydrogel to form a multifunctional nanocomposite hydrogel (PCur/IND@Gel). The <em>in situ</em>-formed hydrogel exhibited excellent photothermal conversion efficiency and sustained drug release behavior both <em>in vitro</em> and <em>in vivo</em>. In addition, PCur-NPs showed enhanced cellular uptake and cytotoxicity under NIR laser irradiation and induced potent immunogenic cell death (ICD). After intratumoral injection of PCur/IND@Gel, significant apoptosis in 4T1 tumors was induced, dendritic cells in lymph nodes were highly activated, potent CD8<sup>+</sup> and CD4<sup>+</sup> antitumor immune responses were elicited and regulative T cells in tumors were significantly reduced, which notably inhibited the tumor growth and prolonged the survive time of 4T1 tumor-bearing mice. Therefore, this injectable nanocomposite hydrogel is a promising drug co-delivery platform for chemo-photothermal-immunotherapy of breast tumors.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848244","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}
引用次数: 0
Photothermal induction of pyroptosis in malignant glioma spheroids using (16-mercaptohexadecyl)trimethylammonium bromide-modified cationic gold nanorods 使用(16-巯基十六烷基)三甲基溴化铵修饰的阳离子金纳米棒光热诱导恶性胶质瘤球体内的热变态反应
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-26 DOI: 10.1016/j.colsurfb.2024.114128
{"title":"Photothermal induction of pyroptosis in malignant glioma spheroids using (16-mercaptohexadecyl)trimethylammonium bromide-modified cationic gold nanorods","authors":"","doi":"10.1016/j.colsurfb.2024.114128","DOIUrl":"10.1016/j.colsurfb.2024.114128","url":null,"abstract":"<div><p>Plasmonic photothermal therapy (PPTT) employing plasmonic gold nanorods (GNRs) presents a potent strategy for eradication of tumors including aggressive brain gliomas. Despite its promise, there is a pressing need for a more comprehensive evaluation of PPTT using sophisticated <em>in vitro</em> models that closely resemble tumor tissues, thereby facilitating the elucidation of therapeutic mechanisms. In this study, we exposed 3D glioma spheroids (tumoroids) to (16-mercaptohexadecyl)trimethylammonium bromide-functionalized gold nanorods (MTAB-GNRs) and a near-infrared (NIR) laser. We demonstrate that the photothermal effect can be fine-tuned by adjusting the nanoparticle concentration and laser power. Depending on the selected parameters, the laser can trigger either regulated or non-regulated cell death (necrosis) in both mouse GL261 and human U-87 MG glioma cell lines, accompanied by translocation of phosphatidylserine in the membrane. Our investigation into the mechanism of regulated cell death induced by PPTT revealed an absence of markers associated with classical apoptosis pathways, such as cleaved caspase 3. Instead, we observed the presence of cleaved caspase 1, gasdermin D, and elevated levels of NLRP3 in NIR-irradiated tumoroids, indicating the activation of pyroptosis. This finding correlates with previous observations of lysosomal accumulation of MTAB-GNRs and the known lysosomal pathway of pyroptosis activation. We further confirmed the absence of toxic breakdown products of GNRs using electron microscopy, which showed no melting or fragmentation of gold nanoparticles under the conditions causing regulated cell death. In conclusion, PPTT using coated gold nanorods offers significant potential for glioma cell elimination occurring through the activation of pyroptosis rather than classical apoptosis pathways.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0927776524003874/pdfft?md5=f94aa5ac49a11caf6d0b6a0f5085ed99&pid=1-s2.0-S0927776524003874-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tannic acid based multifunctional hydrogels with mechanical stability for wound healing 具有伤口愈合机械稳定性的单宁酸基多功能水凝胶
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-26 DOI: 10.1016/j.colsurfb.2024.114127
{"title":"Tannic acid based multifunctional hydrogels with mechanical stability for wound healing","authors":"","doi":"10.1016/j.colsurfb.2024.114127","DOIUrl":"10.1016/j.colsurfb.2024.114127","url":null,"abstract":"<div><p>Conventional wound dressings have poor tissue adhesion and mechanical stability, restricting their applications in dynamic motion environments. Tannic acid (TA) was ideal candidates for current dressing materials due to their well-known antioxidant and anti-inflammatory properties. However, the inevitable polymerization problem of TA limited the one-step synthesis of dressings. Herein, we reported a simple one-pot method to prepare double-network hydrogels containing N-acryloyl glycinamide (NAGA), N-hydroxyethyl acrylamide (HEAA) and TA. The resulting NHT hydrogel exhibited excellent tensile properties, fatigue resistance, and notch insensitivity to ensure mechanical stability under large deformation and stress in vitro. The NHT hydrogel also demonstrated room-temperature self-healing, broad adhesion to various substrates, synergistic swelling ability. In addition, catechol and benzene rings from TA helped shield against UV radiation and acted as free radical scavengers to relieve oxidative stress in wound damage. As a result, full-layer wounds in mice treated with NHT patches showed a higher healing rate, in which epithelialization was completed within 14 days. The integrated function enables hydrogel to maintain mechanical stability in dynamic motion environments with high strain and defects, with great potential for future clinical translation.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848237","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}
引用次数: 0
Bacterial membrane vesicles combined with nanoparticles for bacterial vaccines and cancer immunotherapy 细菌膜囊泡与纳米颗粒相结合,用于细菌疫苗和癌症免疫疗法
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-25 DOI: 10.1016/j.colsurfb.2024.114125
{"title":"Bacterial membrane vesicles combined with nanoparticles for bacterial vaccines and cancer immunotherapy","authors":"","doi":"10.1016/j.colsurfb.2024.114125","DOIUrl":"10.1016/j.colsurfb.2024.114125","url":null,"abstract":"<div><p>Similar to mammalian cells, most bacteria can release nano-sized membrane vesicles (MVs) into the extracellular environment. MVs contain lipids, bioactive proteins, nucleic acids, and metabolites, and play important roles in microbial physiology. MVs have great potential for immunotherapeutic applications, such as bacterial vaccines and cancer immunotherapy. However, because of the diversity in content and heterogeneity in size of MVs, the clinical application of MVs has been limited. Recently, the use of MVs combined with nanoparticles (NPs) has been shown to be effective in improving the homogeneity, stability and function of MVs. In this review, we focus on studies of MVs combined with NPs (MV-NPs) and describe the use of these MV-NPs in biotechnology, especially in bacterial vaccine and cancer immunotherapy.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141852671","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}
引用次数: 0
An electrochemical/SERS dual-mode immunosensor using TMB/Au nanotag and Au@2D-MoS2 modified screen-printed electrode for sensitive detection of prostate cancer biomarker 使用 TMB/Au 纳米标签和 Au@2D-MoS2 改良丝网印刷电极的电化学/SERS 双模免疫传感器,用于灵敏检测前列腺癌生物标记物
IF 5.4 2区 医学
Colloids and Surfaces B: Biointerfaces Pub Date : 2024-07-25 DOI: 10.1016/j.colsurfb.2024.114124
{"title":"An electrochemical/SERS dual-mode immunosensor using TMB/Au nanotag and Au@2D-MoS2 modified screen-printed electrode for sensitive detection of prostate cancer biomarker","authors":"","doi":"10.1016/j.colsurfb.2024.114124","DOIUrl":"10.1016/j.colsurfb.2024.114124","url":null,"abstract":"<div><p>This study describes a novel dual-mode immunosensor that combines electrochemical (EC) and surface-enhanced Raman scattering (SERS) techniques for the detection of prostate-specific antigen (PSA), a biomarker associated with prostate cancer. The sensor consists of a nanocomposite of gold nanoparticles (AuNPs) deposited on two-dimensional (2D) molybdenum disulfide (Au@MoS<sub>2</sub>) modified on a working carbon electrode of a screen-printed electrode (SPE). Subsequently, the primary antibody (Ab1) is immobilized on the modified electrode, creating Ab1/Au@MoS<sub>2</sub>/SPE for specific recognition of the target PSA. In parallel, AuNPs are conjugated with a secondary antibody (Ab2) and a probe molecule, 3,3′,5,5′-tetramethylbenzidine (TMB), leading nanotags (TMB/Ab2/AuNPs) formation exhibiting strong SERS and EC responses. Upon the presence of the target, sandwich immunocomplexes can be formed through antigen-antibody interactions (Ab1-PSA-Ab2). The differential pulse voltammetry (DPV) technique is employed for EC detection mode, while a handheld Raman spectrometer with a 785 nm excitation laser is utilized to collect SERS signals. The developed system demonstrates excellent selectivity and sensitivity, with low limits of detection (LODs) of 3.58 pg mL<sup>−1</sup> and 4.83 pg mL<sup>−1</sup> for EC and SERS sensing, respectively. Importantly, the dual-mode immunosensor proves effective quantifying PSA protein in human serum samples with good recovery. Given its high sensitivity and proficiency in analyzing biological samples, this proposed immunosensor holds promise as an alternative tool for the early diagnosis of cancers.</p></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844624","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}
引用次数: 0
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