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Speciation of selenium-containing small molecules in urine and cell lysate by CE-ICPMS with in-capillary enrichment. 利用毛细管内富集的 CE-ICPMS 对尿液和细胞裂解物中的含硒小分子进行定性。
IF 5.6 1区 化学
Talanta Pub Date : 2025-01-01 Epub Date: 2024-09-21 DOI: 10.1016/j.talanta.2024.126929
Yi Lu, Xue Men, Chengxin Wu, Xing Wei, Mingli Chen, Jianhua Wang
{"title":"Speciation of selenium-containing small molecules in urine and cell lysate by CE-ICPMS with in-capillary enrichment.","authors":"Yi Lu, Xue Men, Chengxin Wu, Xing Wei, Mingli Chen, Jianhua Wang","doi":"10.1016/j.talanta.2024.126929","DOIUrl":"10.1016/j.talanta.2024.126929","url":null,"abstract":"<p><p>The quantitative speciation of selenium in biological systems is highly important for evaluating health status and elucidating transformations of Se species in physiological and pathological processes. Hyphenation of capillary electrophoresis with inductively coupled plasma mass spectrometry (CE-ICPMS) is promising for this purpose. However, the unfavorable or insufficient sensitivity for selenium analysis with CE-ICPMS seriously limits its practical applications in biological analysis, e.g., cell analysis. Therefore, it is crucial to improve the detection sensitivity for Se species. In this study, CE-ICPMS sensitivities for five selenium species (selenocystamine (SeA), methyl-2-acetamido-2-deoxy-1-seleno-β-d-galactopyranoside (SeSug 1), selenomethionine (SeMet), Se-Methylselenocysteine (MeSeCys) and selenocystine (SeCys)) were improved by in-capillary stacking via pH gradient between the zones of sample-leading buffer and the incorporation of isopropanol. The improvement on sensitivity of up to 9.9 folds was achieved in different biological samples, with LODs of 0.29-0.52 μg L<sup>-1</sup>. This approach was further applied for Se speciation in cell lysate, urine and culture medium. It showed that SeMet was more readily reduced in the medium and favorably accumulated by HepG2, HuH-7 and HCCLM3 cells with respect to SeSug 1 and MeSeCys. In cells, all the three Se species were largely transformed into other Se species. Furthermore, more than 70 % of SeMet reduced in medium was transformed into unknown Se species after 48-h interaction with cells.</p>","PeriodicalId":435,"journal":{"name":"Talanta","volume":null,"pages":null},"PeriodicalIF":5.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142338765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Specific isolation and quantification of PD-L1 positive tumor derived exosomes for accurate breast cancer discrimination via aptamer-functionalized magnetic composites and SERS immunoassay. 通过aptamer功能化磁性复合材料和SERS免疫测定,特异性分离和定量PD-L1阳性肿瘤外泌体,以准确鉴别乳腺癌。
IF 5.6 1区 化学
Talanta Pub Date : 2025-01-01 Epub Date: 2024-09-25 DOI: 10.1016/j.talanta.2024.126956
Ning Su, Jin Zhang, Wei Liu, Haoyang Zheng, Mengran Li, Jiandong Zhao, Mingxia Gao, Xiangmin Zhang
{"title":"Specific isolation and quantification of PD-L1 positive tumor derived exosomes for accurate breast cancer discrimination via aptamer-functionalized magnetic composites and SERS immunoassay.","authors":"Ning Su, Jin Zhang, Wei Liu, Haoyang Zheng, Mengran Li, Jiandong Zhao, Mingxia Gao, Xiangmin Zhang","doi":"10.1016/j.talanta.2024.126956","DOIUrl":"10.1016/j.talanta.2024.126956","url":null,"abstract":"<p><p>PD-L1 positive tumor derived exosomes (TEXs<sup>PD-L1</sup>) play a significant role in disease progression, tumor metastasis and cancer immunotherapy. However, the overlap of PD-L1 between TEXs and non-tumor derived exosomes (non-TEXs) restricts the specific isolation and quantification of TEX<sup>PD-L1</sup> from clinical samples. Herein, a new aptamer-functionalized and hydrophilic immunomagnetic substrate was designed by decorating generation 5 polyamidoamine dendrimers (G5 PAMAM), zwitterionic trimethylamine N-oxide (TMAO) and EpCAM (Epithelial cell adhesion molecule) aptamers on magnetic cores sequentially (Fe<sub>3</sub>O<sub>4</sub>@PAMAM@TMAO@Aptamer, named as FPTA) for rapid target and efficient capture of TEXs. The FPTA substrate gathered excellent characters of strong magnetic responsiveness of Fe<sub>3</sub>O<sub>4</sub>, abundant affinity sites of PAMAM, strong hydrophilicity of TMAO and enhanced affinity properties of EpCAM aptamers. Because of these advantages, FPTA can isolate TEXs quickly within 30min with high capture efficiency of 90.5 % ± 3.0 % and low nonspecific absorption of 8.2 % ± 2.0 % for non-TEXs. Furthermore, PD-L1 (Programmed cell death-ligand 1) positive TEXs (TEXs<sup>PD-L1</sup>) from the captured TEXs were recognized and quantitatively analyzed by utilizing SERS (surface-enhanced Raman spectroscopy) reporter molecules 4-NTP (4-Nitrothiophenol) on PD-L1 aptamers-functionalized gold immunoaffinity probe. The signal of TEXs<sup>PD-L1</sup> was converted to SERS signal of 4-NTP at 1344 cm<sup>-1</sup> which exhibited a linear correlation to concentration of TEXs<sup>PD-L1</sup>(R<sup>2</sup> = 0.9905). With these merits, this strategy was further applied to clinical plasma samples from breast cancer (BC) patients and healthy controls (HC), exhibited an excellent diagnosis accuracy with area under curve (AUC) of receiver operating characteristic (ROC) curve reaching 0.988. All these results demonstrate that the FPTA immunomagnetic substrate combined with SERS immunoaffinity probe may become a generic tool for specific isolation and quantitative analysis of PD-L1 positive tumor-derived exosomes in clinics.</p>","PeriodicalId":435,"journal":{"name":"Talanta","volume":null,"pages":null},"PeriodicalIF":5.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142338766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Silk fibroin-based bioelectronic devices for high-sensitivity, stable, and prolonged in vivo recording. 基于蚕丝纤维的生物电子器件,用于高灵敏度、稳定和长时间的体内记录。
IF 10.7 1区 生物学
Biosensors and Bioelectronics Pub Date : 2025-01-01 Epub Date: 2024-10-17 DOI: 10.1016/j.bios.2024.116853
Huiran Yang, Ziyi Zhu, Siyuan Ni, Xueying Wang, Yanyan Nie, Chen Tao, Dujuan Zou, Wanqi Jiang, Ying Zhao, Zhitao Zhou, Liuyang Sun, Meng Li, Tiger H Tao, Keyin Liu, Xiaoling Wei
{"title":"Silk fibroin-based bioelectronic devices for high-sensitivity, stable, and prolonged in vivo recording.","authors":"Huiran Yang, Ziyi Zhu, Siyuan Ni, Xueying Wang, Yanyan Nie, Chen Tao, Dujuan Zou, Wanqi Jiang, Ying Zhao, Zhitao Zhou, Liuyang Sun, Meng Li, Tiger H Tao, Keyin Liu, Xiaoling Wei","doi":"10.1016/j.bios.2024.116853","DOIUrl":"10.1016/j.bios.2024.116853","url":null,"abstract":"<p><p>Silk fibroin, recognized for its biocompatibility and modifiable properties, has significant potential in bioelectronics. Traditional silk bioelectronic devices, however, face rapid functional losses in aqueous or in vivo environments due to high water absorption of silk fibroin, which leads to expansion, structural damage, and conductive failure. In this study, we developed a novel approach by creating oriented crystallization (OC) silk fibroin through physical modification of the silk protein. This advancement enabled the fabrication of electronic interfaces for chronic biopotential recording. A pre-stretching treatment of the silk membrane allowed for tunable molecular orientation and crystallization, markedly enhancing its aqueous stability, biocompatibility, and electronic shielding capabilities. The OC devices demonstrated robust performance in sensitive detection and motion tracking of cutaneous electrical signals, long-term (over seven days) electromyographic signal acquisition in live mice with high signal-to-noise ratio (SNR >20), and accurate detection of high-frequency oscillations (HFO) in epileptic models (200-500 Hz). This work not only improves the structural and functional integrity of silk fibroin but also extends its application in durable bioelectronics and interfaces suited for long-term physiological environments.</p>","PeriodicalId":259,"journal":{"name":"Biosensors and Bioelectronics","volume":null,"pages":null},"PeriodicalIF":10.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142454497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Field-deployable pencil lead-based electrochemical cell for the determination of the emerging contaminant and antidepressant drug venlafaxine in wastewater. 用于检测废水中新出现的污染物和抗抑郁药物文拉法辛的现场部署铅笔式电化学电池。
IF 10.7 1区 生物学
Biosensors and Bioelectronics Pub Date : 2025-01-01 Epub Date: 2024-10-16 DOI: 10.1016/j.bios.2024.116851
Maria Cerrato-Alvarez, Pablo Rioboó-Legaspi, Estefania Costa-Rama, M Teresa Fernández-Abedul
{"title":"Field-deployable pencil lead-based electrochemical cell for the determination of the emerging contaminant and antidepressant drug venlafaxine in wastewater.","authors":"Maria Cerrato-Alvarez, Pablo Rioboó-Legaspi, Estefania Costa-Rama, M Teresa Fernández-Abedul","doi":"10.1016/j.bios.2024.116851","DOIUrl":"10.1016/j.bios.2024.116851","url":null,"abstract":"<p><p>Screening and quantification of emerging contaminants in water is of enormous relevance due to its scarcity and harmful effects on aquatic life and human health. We present a simple and cost-effective electrochemical cell for determination of the antidepressant venlafaxine, an emerging contaminant included in the EU Watch list 2022. The cell consists of pencil leads used as electrodes and a microcentrifuge tube. Modification of the working electrode with carbon nanomaterials improved the signal. Cell-related (e.g., type of pencil leads or electroactive area) as well as experimental (e.g., pH, accumulation potential and time, and scan rate) parameters were thoroughly optimized. The adsorptive nature of venlafaxine process allowed the use of an adsorptive stripping square wave voltammetry methodology to increase the sensitivity. Under optimized variables, a linear range from 0.8 to 10 μmol L<sup>-1</sup> with a correlation coefficient of 0.996, a sensitivity of 1.48 μmol L<sup>-1</sup>, a LOD of 0.4 μmol L<sup>-1</sup> and a RSD of 2.4 % were achieved. Selectivity was also studied, especially with respect to the main metabolite, o-desmethylvenlafaxine. The methodology distinguishes its signal from that of the main compound, allowing its determination. A similar linear range was obtained for the metabolite, with a LOD of 0.6 μmol L<sup>-1</sup>. The platform developed was applied for venlafaxine quantification in spiked wastewaters from the Febros plant in Portugal, obtaining satisfactory recoveries. Furthermore, the versatility of pencil leads made it possible to combine them with modified paper for sampling and buffering in order to decentralize the determination, showing promising results.</p>","PeriodicalId":259,"journal":{"name":"Biosensors and Bioelectronics","volume":null,"pages":null},"PeriodicalIF":10.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142491904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Saline based microfluidic soft pressure sensor utilizing a three-dimensional focused electric field for motion and healthcare monitoring. 基于生理盐水的微流体软压力传感器,利用三维聚焦电场进行运动和医疗监控。
IF 10.7 1区 生物学
Biosensors and Bioelectronics Pub Date : 2025-01-01 Epub Date: 2024-10-21 DOI: 10.1016/j.bios.2024.116868
Suhyeon Kim, Hyeonsu Woo, Seungbin Yoon, HyungGon Shin, Keehoon Kim, Geonhwee Kim, Geunbae Lim
{"title":"Saline based microfluidic soft pressure sensor utilizing a three-dimensional focused electric field for motion and healthcare monitoring.","authors":"Suhyeon Kim, Hyeonsu Woo, Seungbin Yoon, HyungGon Shin, Keehoon Kim, Geonhwee Kim, Geunbae Lim","doi":"10.1016/j.bios.2024.116868","DOIUrl":"10.1016/j.bios.2024.116868","url":null,"abstract":"<p><p>This paper introduces the 'Spatially Focused Saline-based Pressure Sensor (SF-SaPS)', a novel soft microfluidic pressure sensor featuring a distinctive three-dimensional focusing structure. By critically reducing the cross-sectional area of the microchannel at the focused structure, the SF-SaPS achieves excellent sensitivity to pressure within the sensing region. With the spatially focused region, the SF-SaPS could detect a wide range of pressure from gentle touches to human weight, which is typically unachievable with low-conductivity sensing media such as saline, a medium inherently safe for human use. Beyond its sensitivity, the SF-SaPS exhibits sensing performance and stability comparable with conventional liquid metal-based pressure sensors. Our sensor demonstrated minimal signal drift, a rapid response time of 70 ms under cyclic loading, and 20-day long-term stability tests immersed in water. Additionally, the sensor possesses a transparency advantage unattainable by liquid metal sensors as we utilized transparent polymers and saline. A unique advantage of the SF-SaPS lies in its selective spatial and mechanical sensitivity; as the electrical resistance is highly dependent on changes in the cross-sectional area of the microchannels, the sensor has superior pressure sensitivity compared to bending and strain. Finally, various application examples highlight the SF-SaPS's advantages. By configuring the sensor in a two-axis array, the SF-SaPS facilitates pressure mapping across a plane. Additionally, it proves effective in healthcare monitoring, from radial pulse to finger movements. In conclusion, the SF-SaPS's combination of performance, stability, biocompatibility, and transparency positions this sensor as a versatile tool for applications extending beyond healthcare, as demonstrated in this study.</p>","PeriodicalId":259,"journal":{"name":"Biosensors and Bioelectronics","volume":null,"pages":null},"PeriodicalIF":10.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142491918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aggregation-induced emission luminogens for intracellular bacteria imaging and elimination. 用于细胞内细菌成像和消除的聚集诱导发射发光剂。
IF 10.7 1区 生物学
Biosensors and Bioelectronics Pub Date : 2025-01-01 Epub Date: 2024-10-22 DOI: 10.1016/j.bios.2024.116873
Mingji Jiang, Jing Kang, Alideertu Dong
{"title":"Aggregation-induced emission luminogens for intracellular bacteria imaging and elimination.","authors":"Mingji Jiang, Jing Kang, Alideertu Dong","doi":"10.1016/j.bios.2024.116873","DOIUrl":"10.1016/j.bios.2024.116873","url":null,"abstract":"<p><p>Intracellular bacterial infections are a serious threat to human health due to their ability to escape immunity and develop drug resistance. Recent attention has been devoted to identifying and ablating intracellular bacteria with fluorescence probes. Aggregation-induced emission luminogens (AIEgens) photosensitizers as fluorescence probes possess excellent photostability and rapid response, which have emerged as powerful fluorescent tools for intracellular bacterial detection and antibacterial therapy. This review is intended to highlight the current advances in AIEgens on intracellular bacteria imaging and elimination, which covers topics from intracellular AIE mechanism, intracellular bacteria imaging of AIEgens to the elimination of intracellular bacteria with AIEgens. AIEgens utilized different interactions to detect intracellular bacteria, emitting bright light due to restricted intramolecular movement to visualize intracellular bacteria. Photosensitive AIEgens generate reactive oxygen species (ROS) in the aggregate state to elimate intracellular bacteria. Moreover, the prospects and application of AIEgens in intracellular bacteria imaging and elimination are also discussed, which provides insights for the development of AIE-based diagnostic and therapeutic materials and technologies.</p>","PeriodicalId":259,"journal":{"name":"Biosensors and Bioelectronics","volume":null,"pages":null},"PeriodicalIF":10.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Achieving precise dual detection: One-tube reverse transcription-recombinase aided amplification (RT-RAA) combined with lateral flow strip (LFS) assay for RNA and DNA target genes from pepper mild mottle virus and Colletotrichum species in crude plant samples. 实现精确的双重检测:单管反转录-重组酶辅助扩增(RT-RAA)结合侧流条带(LFS)检测植物粗样品中辣椒轻度斑驳病病毒和壳斗孢菌的 RNA 和 DNA 目标基因。
IF 5.6 1区 化学
Talanta Pub Date : 2025-01-01 Epub Date: 2024-09-18 DOI: 10.1016/j.talanta.2024.126908
Yuhao Cao, Dankan Yan, Huijie Zhou, Kelei Han, Qionglian Wan, Jiejun Peng, Hongying Zheng, Lin Lin, Fei Yan, Xuemei Song
{"title":"Achieving precise dual detection: One-tube reverse transcription-recombinase aided amplification (RT-RAA) combined with lateral flow strip (LFS) assay for RNA and DNA target genes from pepper mild mottle virus and Colletotrichum species in crude plant samples.","authors":"Yuhao Cao, Dankan Yan, Huijie Zhou, Kelei Han, Qionglian Wan, Jiejun Peng, Hongying Zheng, Lin Lin, Fei Yan, Xuemei Song","doi":"10.1016/j.talanta.2024.126908","DOIUrl":"10.1016/j.talanta.2024.126908","url":null,"abstract":"<p><p>Ensuring the detection sensitivity of both RNA-derived and DNA-derived target genes in a single reaction has posed a significant challenge for on-site detection of plant pathogens. This challenge was addressed by developing a one-tube dual RT-RAA assay combined with LFS for the rapid on-site detection of pepper mild mottle virus (PMMoV) and four Colletotrichum species causing anthracnose in Solanaceous crops. By testing four different combinations of primer groups, two combinations were precisely adjusted within the dual RT-RAA system to balance amplification efficiency and maintain consistent levels of amplification in crude plant samples. Utilizing commercially accessible small-scale equipment and following a streamlined optimization strategy, the assay achieved a limit of detection of 0.32 copies/μL of target genes in the reaction. Importantly, it demonstrated no cross-reactivity with other plant pathogens, thereby affirming the high sensitivity and specificity of the developed dual RT-RAA-LFS detection assay. Moreover, the entire process took only 25 min from sample collection to the visible presentation of results. The assay was validated with 60 field samples and 10 seed samples, producing results consistent with reverse transcription quantitative polymerase chain reaction (RT-qPCR). Notably, it successfully detected PMMoV in systemic leaves without visible symptoms three days post-inoculation, underscoring its effectiveness in early disease detection. This streamlined strategy offers a valuable approach for rapid, low-cost, and highly sensitive on-site simultaneous detection of RNA genome-contained PMMoV and DNA genome-contained Colletotrichum species.</p>","PeriodicalId":435,"journal":{"name":"Talanta","volume":null,"pages":null},"PeriodicalIF":5.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142278331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Fluorescence of europium activated by molecular-like silver clusters for the detection of alkaline phosphatase activity. 用于检测碱性磷酸酶活性的分子样银簇激活的铕荧光。
IF 5.6 1区 化学
Talanta Pub Date : 2025-01-01 Epub Date: 2024-09-16 DOI: 10.1016/j.talanta.2024.126892
Chen-Xi Zhao, Xiao-Xia Li, Yang Shu
{"title":"Fluorescence of europium activated by molecular-like silver clusters for the detection of alkaline phosphatase activity.","authors":"Chen-Xi Zhao, Xiao-Xia Li, Yang Shu","doi":"10.1016/j.talanta.2024.126892","DOIUrl":"10.1016/j.talanta.2024.126892","url":null,"abstract":"<p><p>Alkaline phosphatase (ALP) is abnormally expressed in some cancers and promotes the growth, metastasis, and invasion of cancer cells. The detection of ALP is of great significance for both pathological study and clinical detection. In this work, a europium (Eu)-based fluorescence detection sensor was prepared in a mild reaction condition. LaF<sub>3</sub>:Eu nanoparticles was mixed with ethylene imine polymer (PEI) and Ag<sup>+</sup> ions. PEI was used as stabilizer and reducing agent, and Ag<sup>+</sup> ions were reduced as molecular-like silver clusters (ML-Ag NCs). The fluorescence of LaF<sub>3</sub>:Eu nanoparticles was enhanced by ML-Ag NCs through energy transfer. When ascorbic acid 2-phosphate (AAP) was hydrolyzed to ascorbic acid (AA) in the presence of ALP, AA reduced Ag<sup>+</sup> ions to silver nanoparticles (Ag NPs) and quenched the fluorescence of LaF<sub>3</sub>:Eu/PEI/Ag. The activity of ALP was detected by measuring the fluorescence intensity of Eu<sup>3+</sup> at 618 nm. In the concentration range from 2.0 to 16.0 U/L, the fluorescence intensity ratio ((F<sub>0</sub>-F)/F<sub>0</sub>) had a linear relationship with the logarithm of ALP concentration. The limit of detection (LOD) was 1.3 U/L. Moreover, the ALP activity was detected successfully in cancer cells by this method. The sensing platform has application potential in the detection of ALP activity in biological systems.</p>","PeriodicalId":435,"journal":{"name":"Talanta","volume":null,"pages":null},"PeriodicalIF":5.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142278354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Multipath collaboration-based signal amplification on Z-scheme In2O3/g-C3N4 heterojunction photoelectrode for sensitive photoelectrochemical immunoassay. 在 Z 型 In2O3/g-C3N4 异质结光电电极上进行基于多径协作的信号放大,用于灵敏的光电化学免疫分析。
IF 5.6 1区 化学
Talanta Pub Date : 2025-01-01 Epub Date: 2024-09-23 DOI: 10.1016/j.talanta.2024.126935
Yuxiang Dong, Weisa Wang, Cheng Guo, Jialin Wang, Dan Li, Changqing Ye
{"title":"Multipath collaboration-based signal amplification on Z-scheme In<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction photoelectrode for sensitive photoelectrochemical immunoassay.","authors":"Yuxiang Dong, Weisa Wang, Cheng Guo, Jialin Wang, Dan Li, Changqing Ye","doi":"10.1016/j.talanta.2024.126935","DOIUrl":"10.1016/j.talanta.2024.126935","url":null,"abstract":"<p><p>The ideal photoelectrode and efficient signaling strategy are pivotal to achieve sensitive photoelectrochemical (PEC) analysis. Here, a multipath collaborative signal amplification-based PEC immunosensor was constructed for the ultrasensitive detection of cytokeratin 19 fragment 21-1. Specifically, the photoelectrode fabricated by Z-scheme In<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction showed enhanced photocurrent intensity in response to visible light. Meanwhile, the signal probe, horseradish peroxidase functionalized dopamine-melanin nanosphere@Au nanoparticles (HRP-Dpa-melanin NS@AuNPs), were introduced into the system. When the target exists, the signal probe can induce multiple quenching of the photocurrent due to the competition of light absorption, steric hindrance and HRP-mediated biocatalytic precipitation, which effectively inhibit light, electron donor, and electron access to the photoelectrode. The fabricated immunosensor exhibits a wide linear range from 1.0 × 10<sup>-3</sup> - 1.0 × 10<sup>2</sup> ng mL<sup>-1</sup> with the detection limit of 0.35 pg mL<sup>-1</sup> (S/N = 3) for cytokeratin 19 fragment 21-1 detection. The study enhances sensitivity for PEC detection by utilizing the superior Z-scheme heterojunction photoelectrode, providing a valuable method that combines multiple signal pathways for a synergistic effect in bioanalysis.</p>","PeriodicalId":435,"journal":{"name":"Talanta","volume":null,"pages":null},"PeriodicalIF":5.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142338761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Novel electrochemiluminescence platform utilizing AuNPs@Uio-66-NH2 bridged luminescent substrates and aptamers for the detection of pesticide residues in Chinese herbal medicines. 利用 AuNPs@Uio-66-NH2 桥接发光底物和适配体的新型电化学发光平台检测中药材中的农药残留。
IF 5.6 1区 化学
Talanta Pub Date : 2025-01-01 Epub Date: 2024-09-20 DOI: 10.1016/j.talanta.2024.126924
Chengqiang Li, Haifang Wang, Jiashuai Sun, Peisen Li, Jiwei Dong, Jingcheng Huang, Haowei Dong, Lingjun Geng, Zhiping Yu, Pengwei Zhang, Wei Chen, Yemin Guo, Xia Sun
{"title":"Novel electrochemiluminescence platform utilizing AuNPs@Uio-66-NH<sub>2</sub> bridged luminescent substrates and aptamers for the detection of pesticide residues in Chinese herbal medicines.","authors":"Chengqiang Li, Haifang Wang, Jiashuai Sun, Peisen Li, Jiwei Dong, Jingcheng Huang, Haowei Dong, Lingjun Geng, Zhiping Yu, Pengwei Zhang, Wei Chen, Yemin Guo, Xia Sun","doi":"10.1016/j.talanta.2024.126924","DOIUrl":"10.1016/j.talanta.2024.126924","url":null,"abstract":"<p><p>A large number of Chinese herbal medicines (CHMs) are included in daily recipes, but their pesticide residues have aroused more and more concerns. In this paper, an electrochemiluminescence aptasensor was constructed for the trace detection of acetamiprid (ACE) in Angelica sinensis and Lycium barbarum. Possessing a large specific surface area, UiO-66 was modified with amino groups to improve biocompatibility, and the addition of AuNPs allowed UiO-66-NH<sub>2</sub> to catalyze the formation of excited states of luminescent molecules (TPrA<sup>⁎</sup>; Ru(bpy)<sub>3</sub><sup>2+</sup><sup>⁎</sup>), and AuNPs@UiO-66-NH<sub>2</sub> was used to bridge the aptamer (Au-S) and luminescent substrate (peptide bond). The conventional luminescent reagent Ru(bpy)<sub>3</sub><sup>2+</sup> was doped with multi-walled carbon nanotubes (MWCNTs) to obtain a more powerful and stable light signal. After optimizing the experimental parameters, the aptasensor could give results in 10 min with a detection range from 1×10<sup>-2</sup>-1×10<sup>4</sup> nM and a lower limit of detection (LOD) of 0.8 pM. The LOD of the study was at least one order of magnitude lower than that of the fluorescence detection method. Furthermore, the accuracy of the aptasensor was validated for spiked recovery experiments.</p>","PeriodicalId":435,"journal":{"name":"Talanta","volume":null,"pages":null},"PeriodicalIF":5.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142338762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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