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Li J, Chu LT, Hartanto H, Guo G, Liu L, Wu J, Wu M, Cui C, Wang G, Liu W, Kwong HK, Wu S, Chen TH. Microfluidic particle counter visualizing mucosal antibodies against SARS-CoV-2 in the upper respiratory tract for rapid evaluation of immune protection. Lab Chip 2024; 24:2658-2668. [PMID: 38660972 DOI: 10.1039/d4lc00118d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Mucosal antibodies in the upper respiratory tract are the earliest and most critical responders to prevent respiratory infections, providing an indication for the rapid evaluation of immune protection. Here, we report a microfluidic particle counter that directly visualizes mucosal antibody levels in nasal mucus. The mucosal anti-SARS-CoV-2 spike receptor binding domain (RBD) antibodies in nasal secretions first react with magnetic microparticles (MMPs) and polystyrene microparticles (PMPs) that are surface-modified to form a "MMPs-anti-spike RBD IgG-PMPs" complex when RBD is present. After magnetic separation and loading into the microfluidic particle counter, the free PMPs, which are reduced with increasing anti-spike RBD IgG antibody levels, are trapped by a microfluidic particle dam and accumulate in the trapping channel. A sensitive mode [limit of detection (LOD): 14.0 ng mL-1; sample-to-answer time: 70 min] and an equipment-free rapid mode (LOD: 37.4 ng mL-1; sample-to-answer time: 20 min) were achieved. Eighty-seven nasal secretion (NS) samples from vaccinees were analyzed using our microfluidic particle counter, and the results closely resemble those of the gold-standard enzyme-linked immunosorbent assay (ELISA). The analysis shows that higher antibody levels were found in convalescent volunteers compared to noninfected volunteers. Together, we demonstrate a rapid kit that directly indicates immune status, which can guide vaccine strategy for individuals and the government.
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Affiliation(s)
- Jiaheng Li
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Lok Ting Chu
- Department of Chemistry and Molecular Biology, School of Basic Medical Sciences, Guang Dong Medical University, Zhanjiang, China
| | - Hogi Hartanto
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Guihuan Guo
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Lu Liu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Jianpeng Wu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Minghui Wu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Chenyu Cui
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering, Hong Kong Science Park, Hong Kong, SAR, China
| | - Gaobo Wang
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Wengang Liu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Hoi Kwan Kwong
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Siying Wu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
| | - Ting-Hsuan Chen
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, SAR, China.
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering, Hong Kong Science Park, Hong Kong, SAR, China
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Suseno M, Hayat B, Putra MDK, Bien JK, Rachmawati R, Hartanto H. A differential item functioning (DIF) analysis of the mobile phone problem use scale in Indonesian schools with and without smartphone banned policy. Cogent Psychology 2022. [DOI: 10.1080/23311908.2022.2137306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
- Muchlas Suseno
- Department of English Language Education, State University of Jakarta, jakarta, Indonesia
| | - Bahrul Hayat
- Faculty of Psychology, Syarif Hidayatullah State Islamic University Jakarta, Indonesia
| | | | - Jonna Karla Bien
- Department of Psychology, Polytechnic University of the Philippines, Manila, Philippines
| | - R. Rachmawati
- Faculty of Medicine, Sriwijaya University, Palembang, Indonesia
| | - H. Hartanto
- Faculty of Psychology, Widya Dharma University, Klaten, Indonesia
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Chu LT, Kwong HK, Hartanto H, Chen TH. Detection of intracellular sodium ions based on phenotype-specific activation of NaA43 DNAzyme. Biosens Bioelectron 2022; 218:114753. [DOI: 10.1016/j.bios.2022.114753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/19/2022] [Accepted: 09/23/2022] [Indexed: 11/02/2022]
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Hartanto H, Wu M, Lam ML, Chen TH. Microfluidic immunoassay for detection of serological antibodies: A potential tool for rapid evaluation of immunity against SARS-CoV-2. Biomicrofluidics 2020; 14:061507. [PMID: 33343783 PMCID: PMC7738199 DOI: 10.1063/5.0031521] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/23/2020] [Indexed: 05/06/2023]
Abstract
In December 2019, coronavirus disease 2019 became a pandemic affecting more than 200 countries and territories. Millions of lives are still affected because of mandatory quarantines, which hamstring economies and induce panic. Immunology plays a major role in the modern field of medicine, especially against virulent infectious diseases. In this field, neutralizing antibodies are heavily studied because they reflect the level of infection and individuals' immune status, which are essential when considering resumption of work, flight travel, and border entry control. More importantly, it also allows evaluating the antiviral vaccine efficacy as vaccines are still known for being the ultimate intervention method to inhibit the rapid spread of virulent infectious diseases. In this Review, we first introduce the host immune response after the infection of SARS-CoV-2 and discuss the latest results using conventional immunoassays. Next, as an enabling platform for detection with sufficient sensitivity while saving analysis time and sample size, the progress of microfluidic-based immunoassays is discussed and compared based on surface modification, microfluidic kinetics, signal output, signal amplification, sample matrix, and the detection of anti-SARS-CoV-2 antibodies. Based on the overall comparison, this Review concludes by proposing the future integration of visual quantitative signals on microfluidic devices as a more suitable approach for general use and large-scale surveillance.
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Affiliation(s)
- Hogi Hartanto
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong Special Administrative Region 999077, China
| | - Minghui Wu
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong Special Administrative Region 999077, China
| | - Miu Ling Lam
- School of Creative Media, City University of Hong Kong, Hong Kong Special Administrative Region 999077, China
| | - Ting-Hsuan Chen
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong Special Administrative Region 999077, China
- Author to whom correspondence should be addressed:
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Bao Y, Wu S, Chu LT, Kwong HK, Hartanto H, Huang Y, Lam ML, Lam RHW, Chen TH. Early Committed Clockwise Cell Chirality Upregulates Adipogenic Differentiation of Mesenchymal Stem Cells. ACTA ACUST UNITED AC 2020; 4:e2000161. [PMID: 32864891 DOI: 10.1002/adbi.202000161] [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] [Received: 06/22/2020] [Revised: 08/03/2020] [Indexed: 11/11/2022]
Abstract
Cell chirality is observed with diverse forms and coordinates various left-right (LR) asymmetry in tissue morphogenesis. To give rise to such diversity, cell chirality may be coupled with cell differentiation. Here, using micropatterned human mesenchymal stem cells (hMSCs), an early committed clockwise (CW) cell chirality that can itself upregulate the adipogenic differentiation is reported. hMSC chirality enables a positively tilted chiral orientation on micropatterned stripes. When cultured as single cells on circular micropatterns, an anticlockwise (ACW)-biased nucleus rotation and swirling pattern of actin filament are observed. Interestingly, with adipogenic induction for 3-6 days, such chirality is reversed to negative chiral orientation and CW-biased rotation, which is earlier than the maturation of other differentiation markers, and consistently expressed in terminally differentiated adipocytes. Using latrunculin A (LatA), cytochalasin D (CD), and nocodazole (Noco) that forces a CW-biased actin filament and nucleus rotation resembling the early differentiated chirality upon adipogenic induction, an upregulation of adipogenic differentiation is found. The result demonstrates that the early differentiated chirality may serve as a mechanical precursor to engage the lineage commitment, suggesting a feedback mechanism of chiral actin in regulating cell differentiation and LR morphogenesis.
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Affiliation(s)
- Yuanye Bao
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Siying Wu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Lok Ting Chu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Hoi Kwan Kwong
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Hogi Hartanto
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Yaozhun Huang
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Miu Ling Lam
- School of Creative Media, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Raymond H W Lam
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
| | - Ting-Hsuan Chen
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region
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Abstract
Lead contamination in drinking water is a primary concern in public health, but it is difficult to monitor by end-users. Here, we provide a rapid and power-free microfluidic particle dam which enables visual quantification of lead ions (Pb2+) by the naked eye. GR-5 DNAzyme with extended termini can connect magnetic microparticles (MMPs) and polystyrene microparticles (PMPs) by DNA hybridization, forming "MMPs-GR-5-PMPs". When Pb2+ is present, GR-5 is cleaved, resulting in an increasing number of free PMPs. To visually count the free PMPs, the solution is loaded to a capillary-driven microfluidic device that consists of a magnetic separator to remove the MMPs-GR-5-PMPs, followed by a particle dam that traps and accumulates the free PMPs into a visual bar with growing length proportional to the concentration of lead. The device achieved a limit of detection at 2.12 nM (0.44 ppb), high selectivity (>20,000-fold) against other metal ions, high tolerance to different pH and water hardness, and is compatible with tap water with a high recovery rate, enabling visual quantification and user-friendly interface for rapid screening of water safety.
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Hartanto H, Ott KH. [Clinical study of electrical root canal length instruments]. ZWR 1991; 100:394-7. [PMID: 1882585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In a clinical study on 100 root canals we measured the difference between the length, which can be received by a roentgenogramme, and the length, which can be received by an electrical device. In cases with vital exstirpation in 80% we got a good conincidence, but in cases of pulp gangraena there were great differences. Indication of electrical devices for measuring tooth length only can be seen together with an existing X-ray; it is very important, whether the canal is dry enough for exact measuring.
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Affiliation(s)
- H Hartanto
- Poliklinik für Zahnerhaltung B der Westfälischen Wilhelms-Universität
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Hartanto H, van Benthem H, Ott KH. [Study of temperature of composite resins during polymerization]. ZWR 1990; 99:986-8. [PMID: 2100454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Temperature was measured during polymerization of 24 composite materials within 5 minutes (up to 10 minutes) after starting polymerization. A sudden rise (10 K-18 K) of temperature could be observed in most of the materials; soon afterwards the primary situation was reached again. The measured high temperatures should be considered to might be one of the factors, which lead to an affection of the pulp tissue.
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Affiliation(s)
- H Hartanto
- Poliklinik für Zahnerhaltung B, der Westfälischen Wilhelms-Universität Münster
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