{"title":"Mesoporous carbon nanospheres-assisted amplified electrochemiluminescence for l-cysteine detection","authors":"Ziqi Wang, Yahui Ji, Hui Zhang, Gen Liu","doi":"10.1016/j.ab.2025.115764","DOIUrl":"10.1016/j.ab.2025.115764","url":null,"abstract":"<div><div>Luminol-loaded mesoporous carbon nanospheres (MCs@LU) were utilized to develop a highly sensitive electrochemiluminescence (ECL) sensor for the detection of L-cysteine (L-Cys). L-Cys acted as the coreactant of luminol, and the pore confinement effect of mesoporous carbons (MCs) resulted in a robust ECL signal. Upon optimization, a linear correlation between the ECL intensity and L-Cys concentration was observed over the range of 5.0 × 10<sup>−10</sup> mol L<sup>−1</sup> to 5.0 × 10<sup>−6</sup> mol L<sup>−1</sup>. The detection limit, with a signal-to-noise ratio of 3, was determined to be 1.67 × 10<sup>−10</sup> mol L<sup>−1</sup>. Additionally, the ECL sensor exhibited good reproducibility, stability, and selectivity for L-Cys and was successfully applied to the quantification of L-Cys in drug samples.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"699 ","pages":"Article 115764"},"PeriodicalIF":2.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142926259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Twice target-recognition mediated exonuclease iii (Exo-iii)-Propelled cascade signal recycling MicroRNA detection system with improved accuracy","authors":"Yuling Jia , Jianhua Yuan , Yanlei Zheng , Yanzhen Huang , Juncai Zhang , Haibin Zhao , Jiefang Zhang","doi":"10.1016/j.ab.2024.115757","DOIUrl":"10.1016/j.ab.2024.115757","url":null,"abstract":"<div><div>Simple yet specific miRNA detection remains an enormous challenge due to its low abundance in samples and the high similarity among homologous miRNAs. Here, we propose a novel fluorescent approach for miRNA detection with greatly elevated accuracy by utilizing exonuclease-iii (Exo-iii) assisted twice target recognition. The proposed method involves a “Sensing probe” engineered with two loop sections to facilitate dual target miRNA recognition. The collaboration between Exo-iii and miRNA initiates target recycling for signal amplification, resulting in the formation of complete DNAzyme. The intact DNAzyme connects with the “Signal probe” and creates a nicking site within its loop region. The fluorescence signal of the “Signal probe” reemerges, correlating with the quantity of miRNA in the sensing system. The suggested technique demonstrates great selectivity for target miRNA and can readily differentiate sequences with a one-base mismatch, based on dual-target identification. Furthermore, the Exo-iii-assisted signal recycling imparts the approach with great sensitivity and a low detection limit of 548 aM. This method has the potential to be a robust alternative for the detection of miRNAs in real samples due to its high accuracy, simplicity, and resistance to potential fluorescence interferences.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"699 ","pages":"Article 115757"},"PeriodicalIF":2.6,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bartłomiej Tołpa , Wiesław Paja , Paweł Jakubczyk , Kornelia Łach , Elżbieta Trojnar , Agnieszka Gala-Błądzińska , Aneta Kowal , Bartosz Klębowski , Jozef Cebulski , Joanna Depciuch
{"title":"Differentiation of glioblastoma G4 and two types of meningiomas using FTIR spectra and machine learning","authors":"Bartłomiej Tołpa , Wiesław Paja , Paweł Jakubczyk , Kornelia Łach , Elżbieta Trojnar , Agnieszka Gala-Błądzińska , Aneta Kowal , Bartosz Klębowski , Jozef Cebulski , Joanna Depciuch","doi":"10.1016/j.ab.2024.115754","DOIUrl":"10.1016/j.ab.2024.115754","url":null,"abstract":"<div><div>Brain tumors are among the most dangerous, due to their location in the organ that governs all life processes. Moreover, the high differentiation of these poses a challenge in diagnostics. Therefore, this study focused on the chemical differentiation of glioblastoma G4 (GBM) and two types of meningiomas (atypical - MAtyp and angiomatous - MAng) were done using Fourier Transform InfraRed (FTIR) spectroscopy, combined with statistical, multivariate, machine learning and rate of spectrum changes methods. The positions of all analyzed peaks differed between GBM and meningiomas. However, for two types of meningiomas, only shift of peaks corresponding to CH<sub>2</sub> bending vibrations, symmetric stretching vibrations of CH<sub>2,</sub> amide A, amide I, C<img>O lipids vibrations, asymmetric stretching vibrations of CH<sub>3</sub> were observed. Principal Component Analysis showed clear differentiation between GBM and the meningiomas. Decision tree clearly showed that wavenumbers corresponding to C<img>O lipids vibrations provided the highest differentiation between GBM and meningiomas tissues, while amide I for two types of meningiomas. The accuracy and specificity of the results for GBM and meningiomas were more than 90 %, while for MAtyp and MAng, these parameters were around 80 %.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"699 ","pages":"Article 115754"},"PeriodicalIF":2.6,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142902598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ilemobayo Victor Fasogbon , Erick Nyakundi Ondari , Deusdedit Tusubira , Loganathan Rangasamy , Janarthanan Venkatesan , Angela Mumbua Musyoka , Patrick Maduabuchi Aja
{"title":"Recent focus in non-SELEX-computational approach for de novo aptamer design: A mini review","authors":"Ilemobayo Victor Fasogbon , Erick Nyakundi Ondari , Deusdedit Tusubira , Loganathan Rangasamy , Janarthanan Venkatesan , Angela Mumbua Musyoka , Patrick Maduabuchi Aja","doi":"10.1016/j.ab.2024.115756","DOIUrl":"10.1016/j.ab.2024.115756","url":null,"abstract":"<div><div>Aptamers, single-stranded nucleic acids that bind to specific targets with high affinity and specificity, hold significant promise in various biomedical and biotechnological applications.</div><div>The traditional method of aptamer selection, SELEX (Systematic Evolution of Ligands by EXponential Enrichment) takes a lot of work and time. Recent advancements in computational methods have revolutionized aptamer design, offering efficient and effective alternatives. This review examines recent advances in non-SELEX and de novo aptamer design methods, such as Making Aptamers without SELEX (MAWS), AptaLoop, AptaDiff, RNAGEN, RaptGen, Apta-MCTS, UltraSelex, and Torkamanian-Afshar model. These computer methods utilize bioinformatics, machine learning, and molecular modeling to generate high-affinity aptamers, eliminating the need for multiple selection steps <em>in vitro</em> or <em>in vivo</em>. We provide a comprehensive analysis of each method's performance, including binding affinity, specificity, and stability, and discuss their practical applications in diagnostics, therapeutics, and environmental monitoring. Furthermore, we highlight the strengths and limitations of computational methods against the traditional one. The potential challenges, future directions, and emerging.technologies were also presented. This review underscores the transformative impact of computational aptamer design on research and industry, paving the way for rapid and cost-effective development of aptamer-based technologies.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"699 ","pages":"Article 115756"},"PeriodicalIF":2.6,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142891679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Atiah H. Almalki , Ahmed K. Bamaga , Adnan Alharbi , Maram H. Abduljabbar , Reem M. Alnemari , Fahad H. Baali , Majed A. Algarni , Marwa F. Ahmed , Sherif Ramzy
{"title":"Exploring the association between serum magnesium level and autism spectrum disorder using validated spectrofluorimetric method","authors":"Atiah H. Almalki , Ahmed K. Bamaga , Adnan Alharbi , Maram H. Abduljabbar , Reem M. Alnemari , Fahad H. Baali , Majed A. Algarni , Marwa F. Ahmed , Sherif Ramzy","doi":"10.1016/j.ab.2024.115755","DOIUrl":"10.1016/j.ab.2024.115755","url":null,"abstract":"<div><div>Magnesium is an essential mineral in biological systems and has a significant impact on brain health. Its deficiency has been found to correlate with irregular metabolic processes and neurodevelopmental disorders. The objective of this research was to establish and validate an analytical approach based on the standard addition methodology for determining endogenous magnesium levels in the serum of autistic and healthy children. Analytically, the approach involved functionalizing fluorescent graphene quantum dots with a magnesium-phosphomolybdic acid ion pair complex, followed by measuring magnesium-induced fluorescence quenching on the functionalized graphene quantum dots, which is concentration-dependent. The approach was validated in accordance with the ICH M10 requirements for bioanalytical technique validation, and it reliably quantified magnesium concentrations in the serum of both autistic and healthy children. The study found that autistic children have considerably lower serum magnesium concentrations than healthy children (<em>P</em> < 0.01), indicating a correlation between magnesium deficiency and autism spectrum disorder. The average serum magnesium levels (mg/dl) recorded for the autistic and healthy groups were 2.03 ± 0.33 and 2.28 ± 0.26, respectively.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"699 ","pages":"Article 115755"},"PeriodicalIF":2.6,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142891678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dinh Phi Long Nguyen , Hoa Thi Le , Dae Ho Kim , Chang-Wook Lee , Jiao Li , Choon Woo Lim , Kwang Pyo Kim , Tae Woo Kim
{"title":"Enrichment and MALDI-TOF-MS/MS analysis of phosphatidylinositol bisphosphates in brain tissue","authors":"Dinh Phi Long Nguyen , Hoa Thi Le , Dae Ho Kim , Chang-Wook Lee , Jiao Li , Choon Woo Lim , Kwang Pyo Kim , Tae Woo Kim","doi":"10.1016/j.ab.2024.115749","DOIUrl":"10.1016/j.ab.2024.115749","url":null,"abstract":"<div><div>Triazolium α-cyclodextrin click cluster-magnetic agarose bead conjugate (<sup><strong>+</strong></sup><strong>CCC-MAB</strong>) was used to enrich phosphatidylinositol bisphosphates in brain tissue. The enriched sample was phosphate-methylated and analyzed by MALDI-TOF-MS/MS in positive ion mode. <sup><strong>+</strong></sup><strong>CCC-MAB</strong> effectively removed weak-binding interferences from the phosphoinositide extract and improved the signal-to-noise ratio. The MALDI-TOF-MS/MS fragment ion revealed sodium adducts of polar head groups, exhibiting a converse fragmentation pattern compared to LC-ESI fragmentation. Our <strong><sup>+</sup>CCC-MAB</strong>-based phosphoinositide enrichment method enabled MALDI-TOF-MS/MS to assign 38 peaks in brain tissue and identify two phosphatidylinositol monophosphates, fifteen bisphosphates, and two trisphosphates. To our knowledge, this is the first study to analyze phosphatidylinositol bisphosphates in brain tissue using specific PIP enrichment and phosphate-methylation with MALDI-TOF-MS/MS.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"698 ","pages":"Article 115749"},"PeriodicalIF":2.6,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142885106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nanoparticle-assisted plasmonic sensors: Recent developments in clinical applications","authors":"Duygu Çimen , Serhat Ünal , Adil Denizli","doi":"10.1016/j.ab.2024.115753","DOIUrl":"10.1016/j.ab.2024.115753","url":null,"abstract":"<div><div>Nanotechnology is an important science that finds a wide range of applications from energy production to industrial production processes and biomedical applications. Nanoparti-cles, which are the most frequently preferred nanomaterials that form the basis of nanotechnolo-gy, are prepared with different composition, size, shape and surface chemistry to provide new techniques in applications in many different fields. The use of nanoparticles in the preparation of plasmonic sensors has increased the interest in plasmonic sensors such as surface plasmon resonance, electrochemical sensors, surface enhanced raman scattering and colorimetric sensors due to their increased sensing capacity on sensor surfaces. Plasmonic sensors are an important option in many different fields, such as medicine, environmental agriculture and food safety, thanks to their ability to solve a multitude of challenges. Because, plasmonic sensors are defined as sensing devices with important features such as sensitive and fast detection, no need for labels, real-time analysis, portability. In this review, the information about nanoparticles and their types and working principles of plasmonic sensors is given. Then, examples in clinical applications using different plasmonic sensors prepared with plasmonic nanoparticles are discussed in detail.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"698 ","pages":"Article 115753"},"PeriodicalIF":2.6,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142885115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"In silico selection against progesterone receptor DNA-binding domain","authors":"Tholasi Nadhan Navien, Ramesh Thevendran, Marimuthu Citartan","doi":"10.1016/j.ab.2024.115752","DOIUrl":"10.1016/j.ab.2024.115752","url":null,"abstract":"<div><div>Progesterone receptor is one of the markers used in antibody-based immunohistochemistry for the diagnostics of breast cancer. The shortcomings of antibodies raise the need to focus on alternative molecular recognition. Aptamers are chosen due to their many advantages as compared to antibodies. However, the rigor of conventional SELEX intensifies the efforts to select DNA aptamers using <em>in silico-</em>docking approach. In this study, we performed <em>in silico</em> selection and experimental validation of DNA aptamers against the progesterone receptor DNA binding domain (PR DBD) using the ssDNA sequences derived from human progesterone response elements (PREs). Firstly, a library of sixty-four different ssDNA was subjected to secondary and tertiary structural determination prior to docking using PatchDock. PRDBDapt17 appeared to be the best candidate, with the highest docking scores of 11334. Molecular dynamic simulation also substantiates PRDBDapt17 as the most potent aptamer. This aptamer, PRDBDapt17 was validated by using direct ELASA. Direct ELASA demonstrated a limit of detection of 3.91 nM while the equilibrium dissociation constant was estimated at 366.6 nM. As PRDBDapt17 also interacts with estrogen receptor and androgen receptor, it can also be a potential universal binder of steroid hormone receptors. PRDBDapt17 can be used in the diagnostics of breast cancer.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"699 ","pages":"Article 115752"},"PeriodicalIF":2.6,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142885110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hend Samy Magar , Muhammad Fayez , Ferdinando Febbraio , Rabeay Y.A. Hassan
{"title":"Esterase-2 mutant-based nanostructured amperometric biosensors for the selective determination of paraoxon (Neurotoxin)","authors":"Hend Samy Magar , Muhammad Fayez , Ferdinando Febbraio , Rabeay Y.A. Hassan","doi":"10.1016/j.ab.2024.115751","DOIUrl":"10.1016/j.ab.2024.115751","url":null,"abstract":"<div><div>Organophosphate pesticides (OPs) are causing non-selective inhibition in enzymatic bioreceptors, thus the enzymatic-inhibition-based traditional assays are not suitable for their specific detection in food and environmental samples. Accordingly, a selective nanostructured electrochemical biosensing system was designed using six mutants of the esterase-2 (EST2 protein) enzymes from <em>A. acidocaldarius</em> to be exploited as targeting bio-receptors for the specific detection of OPs. Each of the EST2 mutant enzymes was immobilized on disposable screen-printed electrodes modified with Aluminum oxide (Al<sub>2</sub>O<sub>3</sub>)/Copper (Cu) nanocomposite. Consequently, chronoamperometric assay was fully optimized, and cross-reactivity study was carried out using paraoxon, malathion and chlorpyrifos. The comparative cross-reactivity study was performed on the six mutant proteins in terms of inhibitory percentage over a wide range of pesticide concentrations. Eventually, a wide dynamic inhibition range was achieved while the limit of detection for the paraoxon toxicity was 0.01 nM and the limit of quantification was 0.05 nM. Finally, paraoxon was selectively determined using the newly developed EST-based biosensor in different spiked food samples.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"698 ","pages":"Article 115751"},"PeriodicalIF":2.6,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Norovirus detection technologies: From conventional methods to innovative biosensors","authors":"David Septian Sumanto Marpaung , Ayu Oshin Yap Sinaga , Damayanti Damayanti","doi":"10.1016/j.ab.2024.115750","DOIUrl":"10.1016/j.ab.2024.115750","url":null,"abstract":"<div><div>The norovirus (NoV), known for its high contagion rate, is the leading cause of acute gastroenteritis. The development of a NoV vaccine is hindered by significant antigenic variation, lack of suitable models, unknown vaccine protection duration, limited human challenge studies, complex performance patterns, and the absence of a reliable in vitro cultivation system, making prevention, early detection, and control the only effective measures to mitigate outbreaks. This review aims to discuss about several norovirus biosensor for point-of-care analysis. Several innovative biosensors have been developed, including techniques such as electrochemical NoV biosensors, colorimetric NoV biosensors, fluorescence NoV biosensors, CRISPR-based NoV biosensors, and other NoV biosensors. These approaches have detected norovirus in biological samples with high sensitivity and specificity. This biosensing technique holds significant promise, not only in improving the speed and accuracy of diagnostic processes but also in strengthening the global response to norovirus infections, thereby underscoring its pivotal role in public health and disease prevention.</div></div>","PeriodicalId":7830,"journal":{"name":"Analytical biochemistry","volume":"698 ","pages":"Article 115750"},"PeriodicalIF":2.6,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}