1
|
Chi R, Lin PY, Jhuo YS, Cheng FY, Ho JAA. Colorimetric detection of African swine fever (ASF)-associated microRNA based on rolling circle amplification and salt-induced gold nanoparticle aggregation. Talanta 2024; 267:125159. [PMID: 37738746 DOI: 10.1016/j.talanta.2023.125159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/31/2023] [Accepted: 09/03/2023] [Indexed: 09/24/2023]
Abstract
African swine fever (ASF) is a severe viral disease with a high mortality rate in domestic and wild pigs, for which no effective vaccine and antiviral drugs are available. The great infectivity of the ASF virus highlights the need for sensitive, simple, and on-site detection assays of ASF. We herein developed a colorimetric sensing strategy for the detection of an ASF-associated miRNA, based on isothermal rolling circle amplification (RCA) and salt-induced gold nanoparticle aggregation. Ssc-miR-451 was selected as the target ASF biomarker due to its high expression in ASF virus-infected pigs. With a red-purple-blue color shifting, this biosensing platform offers convenient detection of ssc-miR-451 with a UV-Vis spectrometer or the naked eye. The proposed assay exhibits a dose-response relationship between the optical absorbance ratio (A525/A640) and the amounts of ssc-miR-451, with a detection limit calculated as 3.56 fmol (equivalent to 11.86 pM in 300 μL reaction mixture). This assay's coefficient of variation (CV%) was determined to be less than 5.95%, revealing its reproducibility is satisfactory. In addition, the newly developed method was successfully applied in the detection of spiked ssc-miR-451 in pig serum samples. In light of its simplicity, convenience (colorimetric), sensitivity, and energy efficiency (isothermal amplification), this biosensing strategy presents great potential to be applied in the local swine industry and pig farming for screening of viral diseases affecting pigs.
Collapse
Affiliation(s)
- Rong Chi
- Department of Chemistry, National Taiwan University, 10617, Taipei, Taiwan
| | - Pei-Ying Lin
- Department of Biochemical Science and Technology, National Taiwan University, 10617, Taipei, Taiwan
| | - Yi-Syuan Jhuo
- Department of Chemistry, Chinese Culture University, 11114, Taipei, Taiwan
| | - Fong-Yu Cheng
- Department of Chemistry, Chinese Culture University, 11114, Taipei, Taiwan
| | - Ja-An Annie Ho
- Department of Chemistry, National Taiwan University, 10617, Taipei, Taiwan; Department of Biochemical Science and Technology, National Taiwan University, 10617, Taipei, Taiwan; Center for Emerging Materials and Advanced Devices, National Taiwan University, 10617, Taipei, Taiwan; Center for Biotechnology, National Taiwan University, 10617, Taipei, Taiwan.
| |
Collapse
|
2
|
Chen L, Qin G, Liu Y, Li M, Li Y, Guo LZ, Du L, Zheng W, Wu PC, Chuang YH, Wang X, Wang TD, Ho JAA, Liu TM. Label-free optical metabolic imaging of adipose tissues for prediabetes diagnosis. Theranostics 2023; 13:3550-3567. [PMID: 37441598 PMCID: PMC10334843 DOI: 10.7150/thno.82697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 05/11/2023] [Indexed: 07/15/2023] Open
Abstract
Rationale: Prediabetes can be reversed through lifestyle intervention, but its main pathologic hallmark, insulin resistance (IR), cannot be detected as conveniently as blood glucose testing. In consequence, the diagnosis of prediabetes is often delayed until patients have hyperglycemia. Therefore, developing a less invasive diagnostic method for rapid IR evaluation will contribute to the prognosis of prediabetes. Adipose tissue is an endocrine organ that plays a crucial role in the development and progression of prediabetes. Label-free visualizing the prediabetic microenvironment of adipose tissues provides a less invasive alternative for the characterization of IR and inflammatory pathology. Methods: Here, we successfully identified the differentiable features of prediabetic adipose tissues by employing the metabolic imaging of three endogenous fluorophores NAD(P)H, FAD, and lipofuscin-like pigments. Results: We discovered that 1040-nm excited lipofuscin-like autofluorescence could mark the location of macrophages. This unique feature helps separate the metabolic fluorescence signals of macrophages from those of adipocytes. In prediabetes fat tissues with IR, we found only adipocytes exhibited a low redox ratio of metabolic fluorescence and high free NAD(P)H fraction a1. This differential signature disappears for mice who quit the high-fat diet or high-fat-high-sucrose diet and recover from IR. When mice have diabetic hyperglycemia and inflamed fat tissues, both adipocytes and macrophages possess this kind of metabolic change. As confirmed with RNA-seq analysis and histopathology evidence, the change in adipocyte's metabolic fluorescence could be an indicator or risk factor of prediabetic IR. Conclusion: Our study provides an innovative approach to diagnosing prediabetes, which sheds light on the strategy for diabetes prevention.
Collapse
Affiliation(s)
- Liping Chen
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| | - Guihui Qin
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Moxin Li
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| | - Yue Li
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| | - Lun-Zhang Guo
- Institute of Biomedical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Lidong Du
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| | - Weiming Zheng
- Translational Medicine R&D Center, Zhuhai UM Science and Technology Research Institute, Zhuhai, China
| | - Pei-Chun Wu
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- Department of Biochemical Science & Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Yueh-Hsun Chuang
- Department of Anesthesiology, National Taiwan University Hospital and College of Medicine, Taipei 10002, Taiwan
| | - Xiaoyan Wang
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| | - Tzung-Dau Wang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei 10002, Taiwan
| | - Ja-An Annie Ho
- Department of Biochemical Science & Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Tzu-Ming Liu
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China
- MOE Frontiers Science Center for Precision Oncology, University of Macau, Macao SAR, China
| |
Collapse
|
3
|
Lin ZZ, Hu MCT, Hsu C, Wu YM, Lu YS, Ho JAA, Yeh SH, Chen PJ, Cheng AL. Synergistic efficacy of telomerase-specific oncolytic adenoviral therapy and histone deacetylase inhibition in human hepatocellular carcinoma. Cancer Lett 2023; 556:216063. [PMID: 36669725 DOI: 10.1016/j.canlet.2023.216063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 12/08/2022] [Accepted: 01/10/2023] [Indexed: 01/20/2023]
Abstract
The telomerase-specific oncolytic adenovirus Telomelysin and the histone deacetylase inhibitor AR42 have demonstrated anticancer effects in preclinical models of human hepatocellular carcinoma (HCC). However, the clinical development of Telomelysin may be hindered by human antiviral immunity and tumor resistance. Combining oncolytic and epigenetic therapies is a viable approach for treating various cancers. This study investigated the potential synergism of Telomelysin and AR42 and the relevant underlying mechanisms. Telomelysin and AR42 exhibited synergistic antiproliferative effects in human HCC models in vitro and in vivo. Apoptosis induced by Telomelysin was significantly enhanced by AR42 in both PLC5 and Hep3B HCC cells. AR42 treatment unexpectedly attenuated the expression of the coxsackievirus and adenovirus receptor and the mRNA levels of human telomerase reverse transcriptase, which may be positively associated with the cytotoxicity of Telomelysin. Meanwhile, the cellular antiviral interferon response was not altered by AR42 treatment. Further, we found that Telomelysin enhanced Akt phosphorylation in HCC cells. AR42 reduced Telomelysin-induced phospho-Akt activation and enhanced Telomelysin-induced apoptosis. The correlation of Akt phosphorylation with drug-induced apoptosis was validated in HCC cells with upregulated or downregulated Akt signaling. Combination therapy with Telomelysin and AR42 demonstrated synergistic anti-HCC efficacy. Clinical trials investigating this new combination regimen are warranted.
Collapse
Affiliation(s)
- Zhong-Zhe Lin
- Department of Medical Oncology, National Taiwan University Cancer Center, Taipei, Taiwan; Departments of Oncology, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | | - Chiun Hsu
- Department of Medical Oncology, National Taiwan University Cancer Center, Taipei, Taiwan; Departments of Oncology, National Taiwan University Hospital, Taipei, Taiwan; Graduate Institute of Oncology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yao-Ming Wu
- Department of Surgery, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yen-Shen Lu
- Departments of Oncology, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ja-An Annie Ho
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Shiou-Hwei Yeh
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Pei-Jer Chen
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ann-Lii Cheng
- Department of Medical Oncology, National Taiwan University Cancer Center, Taipei, Taiwan; Departments of Oncology, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Oncology, College of Medicine, National Taiwan University, Taipei, Taiwan.
| |
Collapse
|
4
|
Herianto S, Chien PJ, Ho JAA, Tu HL. Liposome-based artificial cells: From gene expression to reconstitution of cellular functions and phenotypes. Biomater Adv 2022; 142:213156. [PMID: 36302330 DOI: 10.1016/j.bioadv.2022.213156] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
Bottom-up approaches in creating artificial cells that can mimic natural cells have significant implications for both basic research and translational application. Among various artificial cell models, liposome is one of the most sophisticated systems. By encapsulating proteins and associated biomolecules, they can functionally reconstitute foundational features of biological cells, such as the ability to divide, communicate, and undergo shape deformation. Yet constructing liposome artificial cells from the genetic level, which is central to generate self-sustained systems remains highly challenging. Indeed, many studies have successfully established the expression of gene-coded proteins inside liposomes. Further, recent endeavors to build a direct integration of gene-expressed proteins for reconstituting molecular functions and phenotypes in liposomes have also significantly increased. Thus, this review presents the development of liposome-based artificial cells to demonstrate the process of gene-expressed proteins and their reconstitution to perform desired molecular and cell-like functions. The molecular and cellular phenotypes discussed here include the self-production of membrane phospholipids, division, shape deformation, self-DNA/RNA replication, fusion, and intercellular communication. Together, this review gives a comprehensive overview of gene-expressing liposomes that can stimulate further research of this technology and achieve artificial cells with superior properties in the future.
Collapse
Affiliation(s)
- Samuel Herianto
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan; Chemical Biology and Molecular Biophysics, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan; Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Po-Jen Chien
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Ja-An Annie Ho
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan; BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Hsiung-Lin Tu
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan; Chemical Biology and Molecular Biophysics, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.
| |
Collapse
|
5
|
Lee YL, Chou YT, Su BK, Wu CC, Wang CH, Chang KH, Ho JAA, Chou PT. Comprehensive Thione-Derived Perylene Diimides and Their Bio-Conjugation for Simultaneous Imaging, Tracking, and Targeted Photodynamic Therapy. J Am Chem Soc 2022; 144:17249-17260. [PMID: 36069676 DOI: 10.1021/jacs.2c07967] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, the chromophore 3,4,9,10-perylenetetracarboxylic diimide (PDI) is anchored with phenyl substituents at the imide N site, followed by thionation, yielding a series of thione products 1S-PDI-D, 2S-cis-PDI-D, 2S-trans-PDI-D, 3S-PDI-D, and 4S-PDI-D, respectively, with n = 1, 2, 3, and 4 thione. The photophysical properties are dependent on the number of anchored thiones, where the observed prominent lower-lying absorption is assigned to the S0 → S2(ππ*) transition and is red-shifted upon increasing the number of thiones; the lowest-lying excited state is ascribed to a transition-forbidden S1(nπ*) configuration. All nS-PDIs are non-emissive in solution but reveal an excellent two-photon absorption cross-section of >800 GM. Supported by the femtosecond transient absorption study, the S1(nπ*) → T1(ππ*) intersystem crossing (ISC) rate is > 1012 s-1, resulting in ∼100% triplet population. The lowest-lying T1(ππ*) energy is calculated to be in the order of 1S-PDI-D > 2S-cis-PDI-D ∼ 2S-trans-PDI-D > 3S-PDI-D > 4S-PDI-D, where the T1 energy of 1S-PDI-D (1.10 eV) is higher than that (0.97 eV) of the 1O2 1Δg state. 1S-PDI-D is further modified by either conjugation with peptide FC131 on the two terminal sides, forming 1S-FC131, or linkage with peptide FC131 and cyanine5 dye on each terminal, yielding Cy5-1S-FC131. In vitro experiments show power of 1S-FC131 and Cy5-1S-FC131 in recognizing A549 cells out of other three lung normal cells and effective photodynamic therapy. In vivo, both molecular composites demonstrate outstanding antitumor ability in A549 xenografted tumor mice, where Cy5-1S-FC131 shows superiority of simultaneous fluorescence tracking and targeted photodynamic therapy.
Collapse
Affiliation(s)
- Yao-Lin Lee
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Yi-Te Chou
- Department of Biochemical Science and Technology/Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Bo-Kang Su
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Chi-Chi Wu
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Chih-Hsing Wang
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Kai-Hsin Chang
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Ja-An Annie Ho
- Department of Biochemical Science and Technology/Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan
| |
Collapse
|
6
|
Lin PY, Chi R, Wu YL, Ho JAA. Applications of triplex DNA nanostructures in sensor development. Anal Bioanal Chem 2022; 414:5217-5237. [PMID: 35469098 DOI: 10.1007/s00216-022-04058-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 11/25/2022]
Abstract
Triplex DNA nanostructures are one of the most emerging and fascinating self-assembled nanostructures due to their unique nanoparticle-like organization and inherit characteristics. They have attracted numerous interests recently because of their versatile and powerful utility in diverse areas of science and technology, such as clinical or disease diagnosis and stimuli-based drug delivery. This review addresses particularly the utilization of DNA triplexes in the development of biosensors for detecting nucleic acid; strategies in sensing pH, protein activity, ions, or molecules. Finally, an outlook for potential applications of triplex DNA nanoswitches is provided.
Collapse
Affiliation(s)
- Pei-Ying Lin
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan
| | - Rong Chi
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Ling Wu
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan. .,Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan. .,Center for Emerging Materials and Advanced Devices, National Taiwan University, Taipei, 10617, Taiwan. .,Center for Biotechnology, National Taiwan University, Taipei, 10617, Taiwan.
| |
Collapse
|
7
|
Wu PC, Guo LZ, Yu S, Zeng N, Liu YC, Yu J, Zhang Z, Lu K, Sun L, Wang C, Chang YH, Lu YL, Shen YF, Tai S, Chuang YH, Ho JAA, Huang KW, Wu YM, Liu TM. Noninvasive assessment of liver function reserve with fluorescent dosimetry of indocyanine green. Biomed Opt Express 2022; 13:1995-2005. [PMID: 35519254 PMCID: PMC9045906 DOI: 10.1364/boe.446749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Using in vivo multiphoton fluorescent dosimetry, we demonstrate that the clearance dynamics of Indocyanine Green (ICG) in the blood can quickly reveal liver function reserve. In normal rats, the ICG retention rate was below 10% at the 15-minute post-administration; While in the rat with severe hepatocellular carcinoma (HCC), the 15-minute retention rate is over 40% due to poor liver metabolism. With a 785 nm CW laser, the fluorescence dosimeter can evaluate the liver function reserve at a 1/10 clinical dosage of ICG without any blood sampling. In the future, this low-dosage ICG 15-minute retention dosimetry can be applied for the preoperative assessment of hepatectomy or timely perioperative examination.
Collapse
Affiliation(s)
- Pei-Chun Wu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
- Department of Biomedical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
- Contributed equally
| | - Lun-Zhang Guo
- Department of Biomedical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Contributed equally
| | - Shan Yu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
- Department of Pathology, The Secondary Affiliated Hospital of Harbin Medical University, Harbin 150080, China
- Contributed equally
| | - Ning Zeng
- First Department of Hepatobiliary Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
- Guangdong Provincial Clinical and Engineering Technology Center of Digital Medicine, Guangzhou 510280, China
- Contributed equally
| | - Yu-Cheng Liu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| | - Jia Yu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| | - Zhiming Zhang
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| | - Ke Lu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| | - Liangyu Sun
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| | - Chunfei Wang
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| | - Yu-Han Chang
- Department of Biomedical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
| | - Yin-Lin Lu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Fang Shen
- 3D Printing Medical Research Institute, Asia University, Taichung 41354, Taiwan
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 41354, Taiwan
| | - Sheng Tai
- Department of Hepatopancreatobiliary Surgery, The Secondary Affiliated Hospital of Harbin Medical University, Harbin 150080, China
| | - Yueh-Hsun Chuang
- Department of Anesthesiology, National Taiwan University Hospital, Taipei 10002, Taiwan
| | - Ja-An Annie Ho
- Bioanalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science & Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Kai-Wen Huang
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei 10002, Taiwan
| | - Yao-Ming Wu
- Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei 10002, Taiwan
| | - Tzu-Ming Liu
- Institute of Translational Medicine, Faculty of Health Sciences & Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau, China
| |
Collapse
|
8
|
Jou AFJ, Chou YT, Willner I, Ho JAA. Imaging of Cancer Cells and Dictated Cytotoxicity Using Aptamer-Guided Hybridization Chain Reaction (HCR)-Generated G-Quadruplex Chains. Angew Chem Int Ed Engl 2021; 60:21673-21678. [PMID: 34350685 DOI: 10.1002/anie.202106147] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/14/2021] [Indexed: 01/07/2023]
Abstract
DNA nanotechnology provides powerful tools for developing cancer theranostics. Here we introduce the autonomous surface-nucleolin-guided HCR that leads to the polymerization of G-quadruplex polymer chains, in which the ZnII -protoporphyrin IX is intercalated. We demonstrate that MDA-MB-231 (Triple Negative Breast Cancer cells, TNBC) with overexpressed surface nucleolin were able to induce HCR leading to the formation of the ZnII PPIX-loaded G-quadruplex polymer chains, while the M10 epithelial breast cells served as control. The ZnII PPIX-loaded nanowires allow the selective imaging of TNBC, and their permeation into the TNBC leads to selective cytotoxicity and guided photodynamic therapy toward the cancer cells due to structural perturbation of the membranes. The aptamer-guided HCR-generated G-quadruplex polymer chains may serve as a versatile tool to target TNBC featuring poor prognosis and high pathological risk of recurrence, thus offering a promising theranostic platform.
Collapse
Affiliation(s)
- Amily Fang-Ju Jou
- Bioanalytical Chemistry and Nanobiomedicine Laboratory Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.,Department of Chemistry, Chung Yuan Christian University, No. 200, Chung Pei Road, Taoyuan City, 320314, Taiwan
| | - Yi-Te Chou
- Bioanalytical Chemistry and Nanobiomedicine Laboratory Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Itamar Willner
- Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Ja-An Annie Ho
- Bioanalytical Chemistry and Nanobiomedicine Laboratory Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.,Department of Chemistry, National (Taiwan) University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.,Center for Emerging Materials and Advance Devices, National (Taiwan) University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.,Center for Biotechnology, National (Taiwan) University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan
| |
Collapse
|
9
|
Chang KH, Chao WC, Yang YH, Wu CH, Li ZB, Chen HC, Chou YT, Annie Ho JA, Li XC, Peng YC, Liao YC, Liu KM, Chao CM, Chou PT. Cyano Derivatives of 7-Aminoquinoline That Are Highly Emissive in Water: Potential for Sensing Applications. Chemistry 2021; 27:8040-8047. [PMID: 33904607 DOI: 10.1002/chem.202100413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Indexed: 12/20/2022]
Abstract
6-Cyano-7-aminoquinoline (6CN-7AQ) and 3-cyano-7-aminoquinoline (3CN-7AQ) were synthesized and found to exhibit intense emission with quantum yield as high as 63 % and 85 %, respectively, in water. Conversely, their derivatives 6-cyano-7-azidoquinoline (6CN-7N3 Q) and 3-cyano-7-azidoquinoline (3CN-7N3 Q) show virtually no emission, which makes them suitable to be used as recognition agents in azide reactions based on fluorescence recovery. Moreover, conjugation of 6CN-7AQ with a hydrophobic biomembrane-penetration peptide PFVYLI renders a nearly non-emissive 6CN-7AQ-PFVYLI composite, which can be digested by proteinase K, recovering the highly emissive 6CN-7AQ with ∼200-fold enhancement. The result provides an effective early confirmation for RT-qPCR in viral detection.
Collapse
Affiliation(s)
- Kai-Hsin Chang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Wei-Chih Chao
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Yu-Hsuan Yang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Cheng-Ham Wu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Zhi-Bin Li
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Hung-Che Chen
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Yi-Te Chou
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Center for Emerging Materials and Advanced Devices, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Center for Biotechnology, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Xin-Cheng Li
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Yu-Chiang Peng
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Yu-Chan Liao
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Kuan-Miao Liu
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Chi-Min Chao
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| |
Collapse
|
10
|
Chang YF, Chou YT, Cheng CY, Hsu JF, Su LC, Ho JAA. Amplification-free Detection of Cytomegalovirus miRNA Using a Modification-free Surface Plasmon Resonance Biosensor. Anal Chem 2021; 93:8002-8009. [PMID: 34024100 DOI: 10.1021/acs.analchem.1c01093] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cytomegalovirus (CMV) is the most frequent cause of congenital infection worldwide; congenital CMV may lead to significant mortality, morbidity, or long-term sequelae, such as sensorineural hearing loss. The current study presents a newly designed surface plasmon resonance (SPR) biosensor for CMV-specific microRNAs that does not involve extra care for receptor immobilization or treatment to prevent fouling on bare gold surfaces. The modification-free approach, which utilizes a poly-adenine [poly(A)]-Au interaction, exhibited a high affinity that was comparable to that of the gold-sulfur (Au-S) interaction. In addition, magnetic nanoparticles (MNPs) were used to separate the analyte from complex sample matrixes that significantly reduced nonspecific adsorption. Moreover, the MNPs also played an important role in SPR signal amplification due to the binding-induced change in the refractive index. Our SPR biosensing platform was used successfully for the multi-detection of the microRNAs, UL22A-5p, and UL112-3p, which were associated with CMV. Our SPR biosensor offered the detection limits of 108 fM and 24 fM for UL22A-5p and UL112-3p, respectively, with an R2 of 0.9661 and 0.9985, respectively. The precision of this biosensor has an acceptable CV (coefficient of variation) value of <10%. In addition, our sensor is capable of discriminating between serum samples collected from healthy and CMV-infected newborns. Taken together, we believe that our newly developed SPR biosensing platform is a promising alternative for the diagnosis of CMV-specific microRNA in clinical settings, and its application for the detection of other miRNAs may be extended further.
Collapse
Affiliation(s)
- Ying-Feng Chang
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan.,Artificial Intelligence Research Center, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yi-Te Chou
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Chia-Yu Cheng
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Jen-Fu Hsu
- Division of Pediatric Neonatology, Department of Pediatrics, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan.,College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Li-Chen Su
- General Education Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan.,Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan.,Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.,Center for Emerging Materials and Advanced Devices, National Taiwan University, Taipei 10617, Taiwan.,Center for Biotechnology, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|
11
|
Chou YT, Lin CY, Wen JW, Hung LC, Chang YF, Yang CM, Wu LC, Ho JAA. Targeting triple-negative breast cancer with an aptamer-functionalized nanoformulation: a synergistic treatment that combines photodynamic and bioreductive therapies. J Nanobiotechnology 2021; 19:89. [PMID: 33781277 PMCID: PMC8008604 DOI: 10.1186/s12951-021-00786-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 01/29/2021] [Indexed: 12/17/2022] Open
Abstract
Background Areas of hypoxia are often found in triple-negative breast cancer (TNBC), it is thus more difficult to treat than other types of breast cancer, and may require combination therapies. A new strategy that combined bioreductive therapy with photodynamic therapy (PDT) was developed herein to improve the efficacy of cancer treatment. Our design utilized the characteristics of protoporphyrin IX (PpIX) molecules that reacted and consumed O2 at the tumor site, which led to the production of cytotoxic reactive oxygen species (ROS). The low microenvironmental oxygen levels enabled activation of a bioreductive prodrug, tirapazamine (TPZ), to become a toxic radical. The TPZ radical not only eradicated hypoxic tumor cells, but it also promoted therapeutic efficacy of PDT. Results To achieve the co-delivery of PpIX and TPZ for advanced breast cancer therapy, thin-shell hollow mesoporous Ia3d silica nanoparticles, designated as MMT-2, was employed herein. This nanocarrier designed to target the human breast cancer cell MDA-MB-231 was functionalized with PpIX and DNA aptamer (LXL-1), and loaded with TPZ, resulting in the formation of TPZ@LXL-1-PpIX-MMT-2 nanoVector. A series of studies confirmed that our nanoVectors (TPZ@LXL-1-PpIX-MMT-2) facilitated in vitro and in vivo targeting, and significantly reduced tumor volume in a xenograft mouse model. Histological analysis also revealed that this nanoVector killed tumor cells in hypoxic regions efficiently. Conclusions Taken together, the synergism and efficacy of this new therapeutic design was confirmed. Therefore, we concluded that this new therapeutic strategy, which exploited a complementary combination of PpIX and TPZ, functioned well in both normoxia and hypoxia, and is a promising medical procedure for effective treatment of TNBC. ![]()
Collapse
Affiliation(s)
- Yi-Te Chou
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan
| | - Chih-Yu Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Jyun-Wei Wen
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan
| | - Ling-Chun Hung
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan.,NTU Instrumentation Center, Technology Commons, College of Life Science, National Taiwan University, Taipei, 10617, Taiwan
| | - Ying-Feng Chang
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan
| | - Chia-Min Yang
- Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan. .,Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan.
| | - Li-Chen Wu
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, 54561, Taiwan.
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan. .,Center for Biotechnology, National Taiwan University, Taipei, 10617, Taiwan. .,Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.
| |
Collapse
|
12
|
Thiruppathi M, Tsai CY, Wang TW, Tsao Y, Wu TH, Ho JAA. Simple and Cost-effective Enzymatic Detection of Cholesterol Using Flow Injection Analysis. ANAL SCI 2020; 36:1119-1124. [PMID: 32908068 DOI: 10.2116/analsci.20p080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A flow-injection analytical (FIA) system was developed for the determination of cholesterol concentrations based on enzymatic reactions that occurred in a cholesterol oxidase (CHOx)-immobilized, fused-silica capillary followed by electrochemical detection. The production of hydrogen peroxide from cholesterol in an enzymatic reaction catalyzed by CHOx was subsequently oxidized electrochemically at an electrode. Our FlA system demonstrated its cost-effectiveness and utility at an applied potential of 0.6 V (vs. Ag/AgCl), a flow rate of 100 μL/min and, under optimal conditions, the resulting signal demonstrated a linear dynamic range from 50 μM to 1.0 mM with a limit of detection (LOD) of 12.4 μM, limit of quantification (LOQ) of 44.9 μM, and the coefficient of variation of 5.17%. In addition, validation of our proposed system using a reference HDL-cholesterol kit used for clinical diagnosis suggested our FIA system was comparable to commercial kits for the determination of the cholesterol incorporation amount in various aqueous liposomal suspensions. These good analytical features achieved by FIA could make the implementation of this methodology possible for on-line monitoring of cholesterol in various types of samples.
Collapse
Affiliation(s)
- Murugan Thiruppathi
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University
| | - Ching-Ying Tsai
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University
| | - Tzu-Wen Wang
- Department of Chemistry, National Tsing Hua University
| | - Yu Tsao
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University
| | - Tsung-Hung Wu
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University.,Department of Chemistry, National Tsing Hua University.,Department of Chemistry, National Taiwan University.,Center for Biotechnology, National Taiwan University
| |
Collapse
|
13
|
Thiruppathi M, Lin PY, Chou YT, Ho HY, Wu LC, Ho JAA. Simple aminophenol-based electrochemical probes for non-enzymatic, dual amperometric detection of NADH and hydrogen peroxide. Talanta 2019; 200:450-457. [PMID: 31036208 DOI: 10.1016/j.talanta.2019.03.083] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 11/30/2022]
Abstract
Non enzymatic detection of NADH and H2O2 is of practical significance for both environmental and biological prospective. However, there is no simple, straight forward electrochemical sensor available for sensing of them in real samples. Addressing this challenge, we report a simple stimuli responsive aminophenol, pre-anodized screen printed carbon electrode (SPCE*/AP) based electrochemical probes for dual detection of NADH and H2O2. Aminophenol prepared and adsorbed on the electrode from aminophenylboronic acid via boronic acid deprotection with H2O2. The SPCE*/AP fabricated with this process was characterized by cyclic voltammetry (CV), scanning electron microscope (SEM), Raman spectroscopy, UV-visible spectroscopy, and X-ray photoelectron spectroscopy (XPS). Amperometric detection results showed that SPCE*/AP electrodes exhibited linearity from 50 µM to 500 µM and from 200 µM to 2 mM with a detection limit (S/N = 3) of 4.2 µM and 28.9 µM for NADH and H2O2, respectively. Excellent reproducibility and selectivity for NADH and H2O2 were observed for this electrochemical platform. In addition, the matrix effect was investigated further using the same technique to analyze NADH and H2O2 in human urine samples, human serum samples, cell culture medium (containing 10% fetal bovine serum, FBS), and environmental water samples (tap water and rain water). Also, the present sensor demonstrated promising outcomes with living cells (normal cells and cancer cells).
Collapse
Affiliation(s)
- Murugan Thiruppathi
- Bioanalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Pei-Ying Lin
- Bioanalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Te Chou
- Bioanalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Hsin-Yu Ho
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou 54561, Taiwan
| | - Li-Chen Wu
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou 54561, Taiwan
| | - Ja-An Annie Ho
- Bioanalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan; Center for Biotechnology, National Taiwan University, Taipei 10617, Taiwan.
| |
Collapse
|
14
|
Li MC, Chang YF, Wang HY, Lin YX, Kuo CC, Annie Ho JA, Lee CC, Su LC. An innovative application of time-domain spectroscopy on localized surface plasmon resonance sensing. Sci Rep 2017; 7:44555. [PMID: 28281689 PMCID: PMC5345092 DOI: 10.1038/srep44555] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 02/08/2017] [Indexed: 12/20/2022] Open
Abstract
White-light scanning interferometry (WLSI) is often used to study the surface profiles and properties of thin films because the strength of the technique lies in its ability to provide fast and high resolution measurements. An innovative attempt is made in this paper to apply WLSI as a time-domain spectroscopic system for localized surface plasmon resonance (LSPR) sensing. A WLSI-based spectrometer is constructed with a breadboard of WLSI in combination with a spectral centroid algorithm for noise reduction and performance improvement. Experimentally, the WLSI-based spectrometer exhibits a limit of detection (LOD) of 1.2 × 10-3 refractive index units (RIU), which is better than that obtained with a conventional UV-Vis spectrometer, by resolving the LSPR peak shift. Finally, the bio-applicability of the proposed spectrometer was investigated using the rs242557 tau gene, an Alzheimer's and Parkinson's disease biomarker. The LOD was calculated as 15 pM. These results demonstrate that the proposed WLSI-based spectrometer could become a sensitive time-domain spectroscopic biosensing platform.
Collapse
Affiliation(s)
- Meng-Chi Li
- Thin Film Technology Center/Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Ying-Feng Chang
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Huai-Yi Wang
- Thin Film Technology Center/Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Yu-Xen Lin
- Thin Film Technology Center/Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Chien-Cheng Kuo
- Thin Film Technology Center/Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Cheng-Chung Lee
- Thin Film Technology Center/Department of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan
| | - Li-Chen Su
- Department of Optoelectric Physics, Chinese Culture University, Taipei 11114, Taiwan
| |
Collapse
|
15
|
Li Y, Hsieh CH, Lai CW, Chang YF, Chan HY, Tsai CF, Ho JAA, Wu LC. Tyramine detection using PEDOT:PSS/AuNPs/1-methyl-4-mercaptopyridine modified screen-printed carbon electrode with molecularly imprinted polymer solid phase extraction. Biosens Bioelectron 2016; 87:142-149. [PMID: 27543858 DOI: 10.1016/j.bios.2016.08.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/29/2016] [Accepted: 08/02/2016] [Indexed: 12/30/2022]
Abstract
Tyramine (4-hydroxyphenethylamine), which is a monoamine metabolized by monoamine oxidase (MAO), exists widely in plants, animals, fermented foods, and salted foods. The incidence of hypertension, or "cheese effect", which is associated with a large dietary intake of tyramine while taking MAO inhibitors has been reported; therefore, the measurement of tyramine is an urgent concern. Herein, an efficient approach that integrates a molecular imprinting polymer for solid phase extraction (MISPE) technique with a sensitive electrochemical sensing platform (SPCE/PEDOT: PSS/AuNP/1-m-4-MP) for the quantification of tyramine is presented. Enhanced electrode conductivity was achieved sequentially by constructing a conductive polymer (PEDOT: PSS) on a screen-printed carbon electrode (SPCE), followed by electrodeposition with gold nanoparticles (AuNPs) and, finally, by modification with positively charged 1-methyl-4-mercaptopyridine (1-m-4-MP) using an Au-S bond. Tyramine was isolated selectively and pre-concentrated by the MISPE technique; electroanalysis that used differential pulse voltammetry (DPV) in NaOH (0.1M, pH 13) was conducted successively. Experimental parameters (such as modes of electrode modification, ratio of PEDOT: PSS, pH of electrolyte, time required for AuNP deposition, and 1-m-4-MP concentrations) that were associated with optimal detection conditions were evaluated also. We obtained a linear concentration range (5-100nM, R2=0.9939) with LOD and sensitivity at 2.31nM, and 3.11μAnM-1cm-2, respectively. The applicability of our technique was demonstrated by analyzing tyramine in spiked serum and milk. The feature of our newly developed analytical methods that coupled sample pre-treatment (sample clean-up and pre-concentration) with sensitive detection makes it a promising tool for quantifying of tyramine.
Collapse
Affiliation(s)
- Ying Li
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617 Taiwan
| | - Cheng-Hung Hsieh
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, 545 Taiwan
| | - Chi-Wei Lai
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, 545 Taiwan
| | - Ying-Feng Chang
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617 Taiwan
| | - Hsin-Yi Chan
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, 545 Taiwan
| | - Chang-Feng Tsai
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, 545 Taiwan
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617 Taiwan
| | - Li-Chen Wu
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, 545 Taiwan.
| |
Collapse
|
16
|
Lee MTG, Wang HM, Ho JAA, Fan NC, Yang YL, Lee CC, Chen SC. Resuscitation Using Liposomal Vasopressin in an Animal Model of Uncontrolled Hemorrhagic Shock. PLoS One 2015; 10:e0130655. [PMID: 26154286 PMCID: PMC4496076 DOI: 10.1371/journal.pone.0130655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 05/25/2015] [Indexed: 11/18/2022] Open
Abstract
Background Current research suggests that administration of vasopressin to patients with uncontrolled hemorrhagic shock (UHS) can avoid the detrimental effects associated with aggressive fluid resuscitation. However, vasopressin has a short half-life of 10~35 minutes in in vivo use and precludes its use in the pre-hospital setting. To increase the half-life of vasopressin, we proposed to synthesize liposome-encapsulated vasopressin and test it in a rat model of UHS. Methods The film hydration method was used to prepare liposomal vasopressin consisting of: Dipalmitoylphosphatidylcholine, cholesterol, and dipalmitoyl phosphatidylethanolamine (20:20:1 mole ratio). 42 rats were subjected to UHS and randomly received 5 different treatments (vasopressin, liposomal vasopressin, lactate ringer (LR), liposome only and sham). Outcome of UHS were measured using 4 common prognostic tests: mean arterial pressure (MAP), serum lactate level, inflammatory profile and pulmonary edema. Results The dynamic light scattering results confirmed that we had prepared a successful liposomal vasopressin complex. Comparing the serum vasopressin concentration of liposomal vasopressin and vasopressin treated animals by ELISA, we found that the concentration of vasopressin for the liposomal vasopressin treated group is higher at 60 minutes. However, there was no significant difference between the MAP profile of rats treated with vasopressin and liposomal vasopressin in UHS. We also observed that animals treated with liposomal vasopressin performed indifferently to vasopressin treated rats in serum lactate level, inflammatory profile and edema profile. For most of our assays, the liposome only control behaves similarly to LR resuscitation in UHS rats. Conclusion We have synthesized a liposomal vasopressin complex that can prolong the serum concentration of vasopressin in a rat model of UHS. Although UHS rats treated with either liposomal vasopressin or vasopressin showed no statistical differences, it would be worthwhile to repeat the experiments with different liposomal compositions.
Collapse
Affiliation(s)
- Meng-Tse Gabriel Lee
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Hsuan-Mao Wang
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Ja-An Annie Ho
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Nien-Chu Fan
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Ya-Lin Yang
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chien-Chang Lee
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Department of Emergency Medicine, National Taiwan University Hospital Yunlin Branch, Douliou, Taiwan
- Department of General Medicine, National Taiwan University Hospital Yunlin Branch, Douliou, Taiwan
- * E-mail: (C-CL); (S-CC)
| | - Shyr-Chyr Chen
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
- * E-mail: (C-CL); (S-CC)
| |
Collapse
|
17
|
Jou AFJ, Lu CH, Ou YC, Wang SS, Hsu SL, Willner I, Ho JAA. Diagnosing the miR-141 prostate cancer biomarker using nucleic acid-functionalized CdSe/ZnS QDs and telomerase. Chem Sci 2014; 6:659-665. [PMID: 28706633 PMCID: PMC5491954 DOI: 10.1039/c4sc02104e] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 08/28/2014] [Indexed: 01/05/2023] Open
Abstract
The miR-141 prostate cancer biomarker is optically detected by a two-step analytical platform that includes telomerase and semiconductor quantum dots.
The microRNA, miR-141, is a promising biomarker for prostate cancer. We implement here a two-step sensing platform for the sensitive detection of miR-141. The first step involves the use of semiconductor CdSe/ZnS quantum dots (QDs) modified by FRET quencher-functionalized nucleic acids, that include the recognition sequence for miR-141 and a telomerase primer sequence for the second step of the analytical platform. Subjecting the probe-modified QDs to miR-141, in the presence of duplex specific nuclease, DSN, leads to the formation of a miR-141/probe duplex and to its DSN-mediated cleavage, while regenerating the miR-141. The DSN-induced cleavage of the quencher units leads to the activation of the fluorescence of the QDs, thus allowing the optical detection of miR-141 with a sensitivity corresponding to 1.0 × 10–12 M. The nucleic acid residues associated with the QDs after cleavage of the probe nucleic acids by DSN act as primers for telomerase. The subsequent telomerase/dNTPs-stimulated elongation of the primer units forms G-quadruplex telomer chains. Incorporation of hemin in the resulting G-quadruplex telomer chains yields horseradish peroxidase-mimicking DNAzyme units, that catalyze the generation of chemiluminescence in the presence of luminol/H2O2. The resulting chemiluminescence intensities provide a readout signal for miR-141, DL = 2.8 × 10–13 M. The first step of the sensing platform is non-selective toward miR-141 and the resulting fluorescence may be considered only as an indicator for the existence of miR-141. The second step in the sensing protocol, involving telomerase, provides a selective chemiluminescence signal for the existence of miR-141. The two-step sensing platform is implemented for the analysis of miR-141 in serum samples from healthy individuals and prostate cancer carriers. Impressive discrimination between healthy individuals and prostate cancer carriers is demonstrated.
Collapse
Affiliation(s)
- Amily Fang-Ju Jou
- BioAnalytical Chemistry and Nanobiomedicine Laboratory , Department of Biochemical Science & Technology , National Taiwan University , Taipei 10617 , Taiwan .
| | - Chun-Hua Lu
- Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel .
| | - Yen-Chuan Ou
- VACRS Division of Urology , Department of Surgery , Taichung Veterans General Hospital , Taichung 40705 , Taiwan .
| | - Shian-Shiang Wang
- VACRS Division of Urology , Department of Surgery , Taichung Veterans General Hospital , Taichung 40705 , Taiwan .
| | - Shih-Lan Hsu
- Department of Education and Research , Taichung Veterans General Hospital , Taichung 40705 , Taiwan
| | - Itamar Willner
- Institute of Chemistry , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel .
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory , Department of Biochemical Science & Technology , National Taiwan University , Taipei 10617 , Taiwan .
| |
Collapse
|
18
|
Chang HC, Chang YF, Fan NC, Ho JAA. Facile preparation of high-quantum-yield gold nanoclusters: application to probing mercuric ions and biothiols. ACS Appl Mater Interfaces 2014; 6:18824-31. [PMID: 25323388 DOI: 10.1021/am504546f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This paper describes an eco-friendly, one-pot strategy for the synthesis of water-soluble, high-quantum-yield gold nanoclusters (AuNCs) stabilized with 11-mercaptoundecanoic acid (MUA) on their surfaces. The as-prepared ultrasmall MUA-AuNCs (1.9 nm) exhibited a quantum yield (QY) of 13%, higher than those of most previously described thiol-protected AuNCs. We applied these MUA-AuNCs as a versatile probe to develop a fluorescence "turn-off" assay for sensing Hg(2+) ions as well as a fluorescence "turn-on" assay for sensing biothiols. The former assay operated through aggregation-induced fluorescence quenching upon interaction of the MUA-AuNCs with Hg(2+) ions in a buffer containing 2,6-pyridinedicarboxylic acid (PDCA); this probe provided high sensitivity and remarkable selectivity over other selected metal ions with a limit of detection (LOD) for Hg(2+) ions of 450 pM and linearity from 2 to 50 nM. In the latter assay for biothiols [i.e., cysteine (Cys), homocysteine (Hcy), glutathione (GSH)], the fluorescence of the Hg(2+)-MUA-AuNCs complexes was turned on because the affinity of Hg(2+) ions toward the SH group of the biothiols was greater than that toward the COOH groups of the MUA units on the surface of the AuNCs. This assay provided good linearity for the tested biothiols, ranging from 10 to 100 nM for Cys, from 10 to 100 nM for Hcy, and from 5 to 75 nM for GSH, with LODs of 5.4, 4.2, and 2.1 nM, respectively. In addition, these environmentally and biologically friendly AuNC probes tested satisfactorily against interference from a range of amino acids.
Collapse
Affiliation(s)
- Heng-Chia Chang
- Department of Chemistry, National Tsing Hua University , No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | | | | | | |
Collapse
|
19
|
Liao WC, Annie Ho JA. Improved activity of immobilized antibody by paratope orientation controller: probing paratope orientation by electrochemical strategy and surface plasmon resonance spectroscopy. Biosens Bioelectron 2013; 55:32-8. [PMID: 24355463 DOI: 10.1016/j.bios.2013.10.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 10/16/2013] [Accepted: 10/26/2013] [Indexed: 01/22/2023]
Abstract
Electrochemical method and surface plasmon resonance (SPR) spectroscopic analysis are utilized herein to investigate antibody immobilization without and with orientation control for site-positioning paratopes (antigen binding site) of the antibody molecules. Biotin and its antibody were selected in current study as model. Such an approach employed thiophene-3-boronic acid (T3BA) as paratope orientation controller, (i) enabled site orientation of the antibody molecules reducing the hiding of paratopes, and (ii) maintained the activity of the captured antibodies, as confirmed by electrochemical and SPR analysis. Anti-biotin antibody (a glycoprotein) was covalently bound to a self-assembled monolayer of T3BA modified on a nanogold-electrodeposited screen-printed electrode through boronic acid-saccharide interactions, with the boronic acid units specifically binding to the glycosylation sites of the antibody molecules. The immunosensor functioned based on competition between the analyte biotin and biotin-tagged, potassium hexacyanoferrate(II)-encapsulated liposomes. The current signal produced by the released liposomal Fe(CN)6(4-), measured using square wave voltammetry, yielded a sigmoidally shaped dose-response curve that was linear over eight orders of magnitude (from 10(-11) to 10(-3)M). Furthermore this biosensing system fabricated based on T3BA approach was found to possess significantly improved sensitivity, and the limit of detection toward biotin was calculated as 0.102 ng mL(-1) (equivalent to 6 μL of 4.19 × 10(-10)M biotin).
Collapse
Affiliation(s)
- Wei-Ching Liao
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Department of Chemistry, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Department of Chemistry, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.
| |
Collapse
|
20
|
Abstract
Theranostics is referred to as a treatment strategy that combines therapeutics with diagnostics, aiming to monitor the response to treatment and increase drug efficacy and safety, which would be a key part of personalized medicine and require considerable advances in predictive medicine. Theranostics associates with both a diagnosis that tests patients for possible reactions to taking new medication and targeted drug delivery based on the test results. Emerging nanotechnology provides a great deal of opportunity to design and develop such combination agents, permitting the delivery of therapeutics and concurrently allowing the detection modality to be used not only before or after but also throughout the entire treatment regimen. The introduction of nanotheranostics into routine health care has still a long way to go, since evaluations on cytotoxicity, genotoxicity, and immunotoxicity of prospective nanotheranostics, demonstration of cost-effectiveness, and availability of appropriate accessible testing systems are still required. An extensive review, from a chemistry point of view, of the recent development of nanotheranostics and its in vitro and in vivo applications are herein presented.
Collapse
Affiliation(s)
- Li-Sheng Wang
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | | | | |
Collapse
|
21
|
Prasad KS, Chuang MC, Ho JAA. Synthesis, characterization, and electrochemical applications of carbon nanoparticles derived from castor oil soot. Talanta 2011; 88:445-9. [PMID: 22265524 DOI: 10.1016/j.talanta.2011.10.056] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 10/23/2011] [Accepted: 10/25/2011] [Indexed: 11/15/2022]
Abstract
A simple procedure for the modification of carbon nanoparticles (CNPs) from castor oil soot using acid treatment was described herein. Characterization studies revealed the presence of edge plane sites and surface carbon-oxygen functionalities at the surface of the CNP material. Voltammetric studies revealed the increased electrochemical activity of the CNP-modified electrode toward various biologically important molecules, including dopamine, uric acid, dihydronicotinamide adenine dinucleotide, tyrosine, and serotonin, relative to those obtained using the unmodified electrode. The improved electro-oxidation potentials for these compounds-and, thereby, the enhanced sensitivity of related sensors-was due directly to the presence of surface C(δ+)O(δ-) functional groups and the greater number of edge plane sites developed after acid treatment of the soot sample.
Collapse
Affiliation(s)
- K Sudhakara Prasad
- BioAnalytical and Nanobiomedicinal Laboratory, Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | | | | |
Collapse
|
22
|
Wang LS, Wu LC, Lu SY, Chang LL, Teng IT, Yang CM, Ho JAA. Biofunctionalized phospholipid-capped mesoporous silica nanoshuttles for targeted drug delivery: improved water suspensibility and decreased nonspecific protein binding. ACS Nano 2010; 4:4371-9. [PMID: 20731423 DOI: 10.1021/nn901376h] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A main challenge in nanobiomedicine is the engineering of nanostructures or nanomaterials that can efficiently encapsulate drugs at high load, cross cell membranes, and controllably release their cargo at target sites. Although mesoporous silica nanoparticles (MSNs) are safe, versatile, and promising carrier materials for targeted drug delivery, their aggregation phenomena under physiological conditions (or salt-containing environments) and their nonspecific binding in protein-containing solutions (or serum) limit their applications in biological science and biomedicine. To address this challenge, we have developed a novel delivery system, termed a nanoshuttle, comprising a nanoscale PEGylated-phospholipid coating and 13-(chlorodimethylsilylmethyl)heptacosane-derivatized MSNs, in which therapeutic or imaging agents may be trapped and ligand-assisted targeted delivery may be achieved through surface functionalization of the phospholipids. As a proof of concept in this study, we selected fluorescein isothiocyanate and folate as the imaging tracer and targeted ligand, respectively. Relative to the bare MSNs, the lipid-capped MSNs exhibited superior suspensibility in phosphate-buffered saline and much lower nonspecific binding in vitro. Furthermore, enhanced specific cellular uptake by Hela cells occurred after administering the folate-sensitized phospholipid-capped MSNs. Our results suggest that these highly versatile multifunctional MSNs are promising vectors for nanomedicine applications.
Collapse
Affiliation(s)
- Li-Sheng Wang
- BioAnalytical Lab, Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | | | | | | | | | | |
Collapse
|
23
|
Ho JAA, Chiu JK, Hong JC, Lin CC, Hwang KC, Hwu JRR. Gold-nanostructured immunosensor for the electrochemical sensing of biotin based on liposomal competitive assay. J Nanosci Nanotechnol 2009; 9:2324-2329. [PMID: 19437971 DOI: 10.1166/jnn.2009.se40] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This work describes the development of a cost-effective, easy-to-use, portable immunoanalytical platform technology with sufficient sensitivity for use in the detection of physiologically important targets. Biotin, also known as vitamin H, was selected as the model analyte. The detecting system employs biotin-tagged, potassium ferrocyanide-encapsulated liposomes as the signal amplifier and PAH (poly allylamine hydrochloride)-modified, nanosized-Au particles assembled screen-printed electrode (nanoAu-SPE) as the working electrode. The diagnostic procedures are based on selective immunoanalytical recognitions and sensitive electrochemical detection. The model analyte biotin was determined based on a "competitive-type" immunoassay in which competition occurs between the analyte biotin and potassium ferrocyanide-encapsulated, biotin-tagged liposomes for a limited number of anti-biotin antibody binding sites, which were immobilized on the PAH/nanoAu/SPE surface. The nanostructured Au SPE surface was covalently bonded to the PAH layer, which subsequently interacted with anti-biotin antibodies. The ferrocyanide released from ruptured bound-liposomes was finally measured using square-wave voltammetry. The calibration curve for biotin had a linear range of 10(-11)-10(-2) M, covering nine orders of magnitude. The detection limit of this immunodetecting system was as low as 9.1 pg of biotin (equivalent to 4.5/microL of 8.3 x 10(-9) M).
Collapse
Affiliation(s)
- Ja-An Annie Ho
- BioAnalytical Lab, Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan
| | | | | | | | | | | |
Collapse
|
24
|
Viswanathan S, Rani C, Vijay Anand A, Ho JAA. Disposable electrochemical immunosensor for carcinoembryonic antigen using ferrocene liposomes and MWCNT screen-printed electrode. Biosens Bioelectron 2008; 24:1984-9. [PMID: 19038538 DOI: 10.1016/j.bios.2008.10.006] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2008] [Revised: 09/22/2008] [Accepted: 10/06/2008] [Indexed: 01/16/2023]
Abstract
Disposable electrochemical immunosensor for the detection of carcinoembryonic antigen (CEA) in saliva and serum was developed. Monoclonal anti-CEA antibodies (alphaCEA) were covalently immobilized on polyethyleneimine wrapped multiwalled carbon nanotubes screen-printed electrode. A sandwich immunoassay was performed with CEA and alphaCEA tagged ferrocene carboxylic acid encapsulated liposomes (alphaCEA-FCL). The square wave voltammetry (SWV) was employed to analyze faradic redox responses of the released ferrocene carboxylic acid from the immunoconjugated liposomes on the electrode surface. The magnitude of the SWV peak current was directly related to the concentration of CEA. The calibration curve for CEA concentration was in the range of 5 x 10(-12) to 5 x 10(-7)gmL(-1) with a detection limit of 1 x 10(-12)gmL(-1) (S/N=3). This method provides a high precise and sensitive determination of CEA in human blood serum and saliva samples.
Collapse
Affiliation(s)
- Subramanian Viswanathan
- Department of Biosensors, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-747 Olsztyn, Poland
| | | | | | | |
Collapse
|
25
|
Ho JAA, Wu LC, Huang MR, Lin YJ, Baeumner AJ, Durst RA. Application of Ganglioside-Sensitized Liposomes in a Flow Injection Immunoanalytical System for the Determination of Cholera Toxin. Anal Chem 2006; 79:246-50. [PMID: 17194147 DOI: 10.1021/ac060889n] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cholera, an acute infectious disease associated with water and seafood contamination, is caused by the bacterium Vibrio cholerae, which lives and colonizes in the small intestine and secretes cholera toxin (CT), a causative agent for diarrhea in humans. Based on earlier lateral flow assays, a flow injection liposome immunoanalysis (FILIA) system with excellent sensitivity was developed in this study for the determination of CT at zeptomole levels. Ganglioside (GM1), found to have specific affinity toward CT, was inserted into the phospholipid bilayer during the liposome synthesis. These GM1-sensitized, sulforhodamine B (SRB) dye-entrapping liposomes were used as probes in the FILIA system. Anti-CT antibodies were immobilized in its microcapillary. CT was detected by the formation of a sandwich complex between the immobilized antibody and GM1 liposomes. During the assay, the sample was introduced first into the column, and then liposomes were injected to bind to all CT captured by the antibody in the microcapillary. Subsequently, the SRB dye molecules were released from the bound liposomes via the addition of the detergent octyl glucopyranoside. The released dye molecules were transported to a flow-through fluorescence detector for quantification. The FILIA system was optimized with respect to flow rate, antibody concentration, liposome concentration, and injected sample volume. The calibration curve for CT had a linear range of 10-16 to 10-14 g mL-1. The detection limit of this immunosensor was 6.6 x 10(-17) g mL-1 in 200-microL samples (equivalent to 13 ag or 1.1 zmol).
Collapse
Affiliation(s)
- Ja-An Annie Ho
- BioAnalytical Chemistry Laboratory, Department of Chemistry, National Tsing Hua University, Hsinchu, 300 Taiwan.
| | | | | | | | | | | |
Collapse
|
26
|
Ho JAA, Wu LC, Fan NC, Lee MS, Kuo HY, Yang CS. Development of a long-life capillary enzyme bioreactor for the determination of blood glucose. Talanta 2006; 71:391-6. [PMID: 19071317 DOI: 10.1016/j.talanta.2006.04.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Revised: 04/11/2006] [Accepted: 04/11/2006] [Indexed: 11/29/2022]
Abstract
A long-life capillary enzyme bioreactor was developed that determines glucose concentrations with high sensitivity and better stability than previous systems. The bioreactor was constructed by immobilizing glucose oxidase (GOx) onto the inner surface of a 0.53mm i.d. fused-silica capillary that was part of a continuous-flow system. In the presence of oxygen, GOx converts glucose to gluconic acid and hydrogen peroxide (H(2)O(2)). Hydrogen peroxide detection was accomplished using an amperometric electrochemical detector. The integration of this capillary reactor into a flow-injection (FIA) system offered a larger surface-to-volume ratio, reduced band-broadening effects, and reduced reagent consumption compared to packed column in FIA or other settings. To obtain operational (at ambient temp) and storage (at 4 degrees C) stability for 20 weeks, the glucose biosensing system was prepared using an optimal GOx concentration (200mg/mL). This exhibited an FIA peak response of 7min and a detection limit of 10muM (S/N=3) with excellent reproducibility (coefficient of variation, CV<0.75%). It also had a linear working range from 10(1) to 10(4)muM. The enzyme activity in this proposed capillary enzyme reactor was well maintained for 20 weeks. Furthermore, 20 serum samples were analyzed using this system, and these correlated favorably (correlation coefficient, r(2)=0.935) with results for the same samples obtained using a routine clinical method. The resulting biosensing system exhibited characteristics that make it suitable for in vivo application.
Collapse
Affiliation(s)
- Ja-An Annie Ho
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan; Department of Applied Chemistry, National Chi-Nan University, Puli, Nantou 545, Taiwan
| | | | | | | | | | | |
Collapse
|
27
|
Viswanathan S, Wu LC, Huang MR, Ho JAA. Electrochemical Immunosensor for Cholera Toxin Using Liposomes and Poly(3,4-ethylenedioxythiophene)-Coated Carbon Nanotubes. Anal Chem 2006; 78:1115-21. [PMID: 16478102 DOI: 10.1021/ac051435d] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A sensitive method for the detection of cholera toxin (CT) using an electrochemical immunosensor with liposomic magnification followed by adsorptive square-wave stripping voltammetry is described. Potassium ferrocyanide-encapsulated and ganglioside (GM1)-functionalized liposomes act as highly specific recognition labels for the amplified detection of cholera toxin. The sensing interface consists of monoclonal antibody against the B subunit of CT that is linked to poly(3,4-ethylenedioxythiophene) coated on Nafion-supported multiwalled carbon nanotube caste film on a glassy carbon electrode. The CT is detected by a "sandwich-type" assay on the electronic transducers, where the toxin is first bound to the anti-CT antibody and then to the GM1-functionalized liposome. The potassium ferrocyanide molecules are released from the bounded liposomes on the electrode by lyses with methanolic solution of Triton X-100. The released electroactive marker is measured by adsorptive square-wave stripping voltammetry. The sandwich assay provides the amplification route for the detection of the CT present in ultratrace levels. The calibration curve for CT had a linear range of 10(-14)-10(-7)g mL(-1). The detection limit of this immunosensor was 10(-16) g of cholera toxin (equivalent to 100 microL of 10(-15) g mL(-1)).
Collapse
Affiliation(s)
- Subramanian Viswanathan
- BioAnalytical Chemistry Laboratory, Department of Chemistry, National Tsing Hua University, Hsinchu, 300 Taiwan
| | | | | | | |
Collapse
|
28
|
Abstract
Red koji has been recognized as a cholesterol-lowering diet supplement because of it contains fungi metabolites, monacolins, which reduce cholesterol synthesis by inhibiting HMG-CoA reductase. In this study, water extracts of red koji were loaded onto a C(18) cartridge, and the acetonitrile eluate was collected as test fraction. Red koji water extracts and its C(18) cartridge acetonitrile eluent had total phenols concentrations of 5.57 and 1.89 mg/g of red koji and condensed tannins concentrations of 2.71 and 1.20 mg/g of red koji, respectively. Both exhibited an antioxidant activity and an inhibitory activity to mushroom tyrosinase. The higher antioxidant activity of the red koji acetonitrile eluent was due to the existence of a high percentage of condensed tannins. The results from the kinetic study for inhibition of mushroom tyrosinase by red koji extracts showed that the compounds in the extracts competitively inhibited the oxidation of tyrosine catalyzed by mushroom tyrosinase with an ID(50) of 5.57 mg/mL.
Collapse
Affiliation(s)
- Li-Chen Wu
- Department of Applied Chemistry, National Chi-Nan University, Puli, Nantou 545, Taiwan.
| | | | | | | |
Collapse
|
29
|
Abstract
A technique has been developed for the preparation of aflatoxin B1 (AFB1)-tagged liposomes encapsulating a visible dye. These liposomes have several useful potential analytical applications, one of which is demonstrated. A simple plastic-backed nitrocellulose strip is the basis for an assay for detecting AFB1. Samples containing aflatoxin B1 are allowed to migrate by capillary action along the strip into a zone containing immobilized antibodies; then aflatoxin B1-tagged, dye-containing liposomes are allowed to migrate into the same area, filling any remaining antibody sites. The liposomes that bound to the antibody zone exhibit an intense purplish pink color whose optical density is inversely proportional to the aflatoxin concentration in the sample. The device is capable of detecting aflatoxin B1 at levels down to 20 ng and could serve as a rapid procedure for visual screening of agricultural and food samples for AFB1 or, with densitometry, as an inexpensive quantitative assay.
Collapse
Affiliation(s)
- J A A Ho
- University of Georgia Coastal Plain Experiment Station, Tifton 31793, USA.
| | | |
Collapse
|