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Sil S, Mishra K, Pal SK. Liquid Crystal Biosensors: An Overview of Techniques to Monitor Enzyme Activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2025; 41:4959-4975. [PMID: 39963995 DOI: 10.1021/acs.langmuir.4c04395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/05/2025]
Abstract
Liquid crystals (LCs) have transformed the world of optoelectronic displays and are now recognized as useful soft materials for a broad range of biomedical applications. Combination of smart sensors with label-free imaging offers intriguing prospects for point-of-care diagnostics. Here, we outline a sophisticated collage of the most important discoveries that show how LC biosensors can be used to monitor different enzymatic activities for the diagnosis of specific disease biomarkers or infections in body fluids, cellular milieu, and clinical samples. In living organisms, enzymes have a primary regulatory role in both accelerating and controlling metabolic reactions. We mention the ubiquitous techniques that are used to fabricate LC-based enzyme biosensors in attaining specific strategies along with greater sensitivity for the detection of clinically important biomolecules.
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Affiliation(s)
- Soma Sil
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, Manauli 140306, India
| | - Kirtika Mishra
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, Manauli 140306, India
| | - Santanu Kumar Pal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, Manauli 140306, India
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Zhang X, Jia Y, Fei Y, Lu Y, Liu X, Shan H, Huan Y. Cu/Au nanoclusters with peroxidase-like activity for chemiluminescence detection of α-amylase. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1553-1558. [PMID: 36883451 DOI: 10.1039/d3ay00029j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Herein, a novel chemiluminescence method was developed for efficient and sensitive detection of α-amylase activity. α-Amylase is closely related to our life, and α-amylase concentration is a marker for the diagnosis of acute pancreatitis. In this paper, Cu/Au nanoclusters with peroxidase-like activity were prepared using starch as a stabilizer. Cu/Au nanoclusters can catalyze H2O2 to generate reactive oxygen species and increase the CL signal. The addition of α-amylase makes the starch decompose and causes the nanoclusters to aggregate. The aggregation of the nanoclusters caused them to increase in size and decrease in the peroxidase-like activity, resulting in a decrease in the CL signal. α-Amylase was detected by the CL method of signal changes caused by dispersion-aggregation in the range of 0.05-8 U mL-1 with a low detection limit of 0.006 U mL-1. The chemiluminescence scheme based on the luminol-H2O2-Cu/Au NC system is of great significance for the sensitive and selective determination of α-amylase in real samples, and the detection time is short. This work provides new ideas for the detection of α-amylase based on the chemiluminescence method and the signal lasts for a long time, which can realize timely detection.
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Affiliation(s)
- Xiaoxu Zhang
- College of Chemistry, Jilin University, Changchun 130023, People's Republic of China.
| | - Yuying Jia
- College of Chemistry, Jilin University, Changchun 130023, People's Republic of China.
| | - Yanqun Fei
- Changchun Zhuoyi Biological Co., Ltd., Changchun, 130616, People's Republic of China
| | - Yongzhuang Lu
- College of Chemistry, Jilin University, Changchun 130023, People's Republic of China.
| | - Xiaoli Liu
- College of Chemistry, Jilin University, Changchun 130023, People's Republic of China.
| | - Hongyan Shan
- College of Chemistry, Jilin University, Changchun 130023, People's Republic of China.
| | - Yanfu Huan
- College of Chemistry, Jilin University, Changchun 130023, People's Republic of China.
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Abbasi AD, Hussain Z, Yang KL. Aptamer-Based Gold Nanoparticles-PDMS Composite Stamps as a Platform for Micro-Contact Printing. BIOSENSORS 2022; 12:1067. [PMID: 36551034 PMCID: PMC9775676 DOI: 10.3390/bios12121067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
In the present study, a functional template made up of in situ synthesised gold nanoparticles (AuNPs) is prepared on polydimethylsiloxane (PDMS) for patterning of target protein onto the desired solid substrates. Unlike previous studies in which bioreceptor probes are randomly attached to the PDMS stamp through electrostatic interactions, herein, we propose an AuNPs-PDMS stamp, which provides a surface for the attachment of thiol-modified biorecognition probes to link to the stamp surface through a dative bond with a single anchoring point based on thiol chemistry. By using this platform, we have developed the ability for microcontact printing (µCP) to selectively capture and transfer target protein onto solid surfaces for detection purposes. After µCP, we also investigated whether liquid crystals (LCs) could be used as a label-free approach for identifying transfer protein. Our reported approach provides promise for biosensing of various analytes.
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Affiliation(s)
- Amna Didar Abbasi
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
| | - Zakir Hussain
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
| | - Kun-Lin Yang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Engineering Drive 4, Singapore 117576, Singapore
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Rouhbakhsh Z, Huang JW, Ho TY, Chen CH. Liquid crystal-based chemical sensors and biosensors: From sensing mechanisms to the variety of analytical targets. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Lu S, Hu Q, Yu L. Construction of a liquid Crystal-based Sensing Platform for the Sensitive Detection of Catalase in Human Serum. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zhao M, Luo L, Guo Y, Zhao B, Chen X, Shi X, Khan M, Lin JM, Hu Q. Viscosity-Based Flow Sensor on Paper for Quantitative and Label-Free Detection of α-Amylase and Its Inhibitor. ACS Sens 2022; 7:593-600. [PMID: 35050602 DOI: 10.1021/acssensors.1c02489] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
α-Amylase (AMS) in human serum is a critical biomarker for the early diagnosis of pancreatic damage. In addition, the inhibition of α-amylase has long been thought to decrease the occurrence of diabetes. Thus, it is critical to construct a facile and convenient method for the determination of AMS and its inhibitor. In this study, we demonstrate a novel amylase sensor based on translating the viscosity change of the aqueous solution into the difference of the water diffusion length on a pH paper strip. AMS can be quantitatively detected by measuring the viscosity change of the amylopectin solution in the presence of AMS with different concentrations. The paper-based AMS sensor has a very high sensitivity with a detection limit of 0.017 U/mL and also shows excellent specificity. In addition, the inhibitory effect of acarbose on AMS is demonstrated with the IC50 value determined to be 21.66 ± 1.13 μg/mL. Furthermore, it is also evaluated for the detection of AMS in human serum samples of healthy people and acute pancreatitis patients. The difference in amylase levels between the two groups is unambiguously distinguished. Overall, this study provides a very simple, cost-effective, equipment-free, high-throughput, and label-free method for rapid and quantitative detection of α-amylase and may have significant applications in the diagnosis of acute pancreatitis and the screening of AMS inhibitors.
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Affiliation(s)
- Mei Zhao
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Limei Luo
- Maternal and Child Health Development Research Center, Shandong Provincial Maternal and Child Health Care Hospital, Jinan 250014, China
| | - Yongxian Guo
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Binglu Zhao
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Xiangfeng Chen
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Xingang Shi
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Mashooq Khan
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Qiongzheng Hu
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
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Wei W, Zhang X, Hou Z, Hu X, Wang Y, Wang C, Yang S, Cui H, Zhu L. Microbial Regulation of Deterioration and Preservation of Salted Kelp under Different Temperature and Salinity Conditions. Foods 2021; 10:foods10081723. [PMID: 34441501 PMCID: PMC8394645 DOI: 10.3390/foods10081723] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 11/25/2022] Open
Abstract
High salinity is an effective measure to preserve kelp, but salted kelp can still deteriorate after long-term preservation. In order to clarify the key conditions and microbial behavior of salted kelp preservation, 10% (S10), 20% (S20), and 30% (S30) salt concentrations were evaluated at 25 °C (T25) and 4 °C (T4). After 30 days storage, these salted kelps showed different states including rot (T25S10), softening (T25S20), and undamaged (other samples). By detecting polysaccharide lyase activity and performing high-throughput sequencing of the prokaryotic 16S rRNA sequence and metagenome, we found that deteriorated kelps (T25S10 and T25S20) had significantly higher alginate lyase activity and bacterial relative abundance than other undamaged samples. Dyella, Saccharophagus, Halomonas, Aromatoleum, Ulvibacter, Rhodopirellula, and Microbulbifer were annotated with genes encoding endonuclease-type alginate lyases, while Bacillus and Thiobacillus were annotated as the exonuclease type. Additionally, no alginate lyase activity was detected in undamaged kelps, whose dominant microorganisms were halophilic archaea without alginate lyase-encoding genes. These results indicated that room-temperature storage may promote salted kelp deterioration due to the secretion of bacterial alginate lyase, while ultra-high-salinity and low-temperature storage can inhibit bacterial alginate lyase and promote the growth of halophilic archaea without alginate lyase, thus achieving the preservation of salted kelp.
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Affiliation(s)
- Wei Wei
- School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China; (W.W.); (X.Z.); (S.Y.)
| | - Xin Zhang
- School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China; (W.W.); (X.Z.); (S.Y.)
| | - Zhaozhi Hou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (Z.H.); (X.H.); (Y.W.); (C.W.); (H.C.)
| | - Xinyu Hu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (Z.H.); (X.H.); (Y.W.); (C.W.); (H.C.)
| | - Yuan Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (Z.H.); (X.H.); (Y.W.); (C.W.); (H.C.)
| | - Caizheng Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (Z.H.); (X.H.); (Y.W.); (C.W.); (H.C.)
| | - Shujing Yang
- School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China; (W.W.); (X.Z.); (S.Y.)
| | - Henglin Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (Z.H.); (X.H.); (Y.W.); (C.W.); (H.C.)
| | - Lin Zhu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (Z.H.); (X.H.); (Y.W.); (C.W.); (H.C.)
- Correspondence: ; Tel.: +86-511-8878-0201
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